1 /* C Compatible Compiler Preprocessor (CCCP)
2 Copyright (C) 1986, 87, 89, 92, 93, 1994 Free Software Foundation, Inc.
3 Written by Paul Rubin, June 1986
4 Adapted to ANSI C, Richard Stallman, Jan 1987
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding! */
24 typedef unsigned char U_CHAR;
28 #include "../src/config.h"
36 /* The macro EMACS is defined when cpp is distributed as part of Emacs,
37 for the sake of machines with limited C compilers. */
40 #endif /* not EMACS */
42 #ifndef STANDARD_INCLUDE_DIR
43 #define STANDARD_INCLUDE_DIR "/usr/include"
46 #ifndef LOCAL_INCLUDE_DIR
47 #define LOCAL_INCLUDE_DIR "/usr/local/include"
50 #if 0 /* We can't get ptrdiff_t, so I arranged not to need PTR_INT_TYPE. */
52 #define PTR_INT_TYPE ptrdiff_t
54 #define PTR_INT_TYPE long
64 /* By default, colon separates directories in a path. */
65 #ifndef PATH_SEPARATOR
66 #define PATH_SEPARATOR ':'
69 /* In case config.h defines these. */
74 #include <sys/types.h>
82 #include <sys/time.h> /* for __DATE__ and __TIME__ */
83 #include <sys/resource.h>
90 /* This defines "errno" properly for VMS, and gives us EACCES. */
93 /* VMS-specific definitions */
97 #define O_RDONLY 0 /* Open arg for Read/Only */
98 #define O_WRONLY 1 /* Open arg for Write/Only */
99 #define read(fd,buf,size) VMS_read (fd,buf,size)
100 #define write(fd,buf,size) VMS_write (fd,buf,size)
101 #define open(fname,mode,prot) VMS_open (fname,mode,prot)
102 #define fopen(fname,mode) VMS_fopen (fname,mode)
103 #define freopen(fname,mode,ofile) VMS_freopen (fname,mode,ofile)
104 #define strncat(dst,src,cnt) VMS_strncat (dst,src,cnt)
105 static char * VMS_strncat ();
106 static int VMS_read ();
107 static int VMS_write ();
108 static int VMS_open ();
109 static FILE * VMS_fopen ();
110 static FILE * VMS_freopen ();
111 static void hack_vms_include_specification ();
112 typedef struct { unsigned :16, :16, :16; } vms_ino_t;
113 #define ino_t vms_ino_t
114 #define INCLUDE_LEN_FUDGE 10 /* leave room for VMS syntax conversion */
116 #define BSTRING /* VMS/GCC supplies the bstring routines */
117 #endif /* __GNUC__ */
120 extern char *index ();
121 extern char *rindex ();
129 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
130 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
132 /* Find the largest host integer type and set its size and type. */
134 #ifndef HOST_BITS_PER_WIDE_INT
136 #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT
137 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
138 #define HOST_WIDE_INT long
140 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT
141 #define HOST_WIDE_INT int
147 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
151 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
154 /* Define a generic NULL if one hasn't already been defined. */
161 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
162 #define GENERIC_PTR void *
164 #define GENERIC_PTR char *
169 #define NULL_PTR ((GENERIC_PTR)0)
172 #ifndef INCLUDE_LEN_FUDGE
173 #define INCLUDE_LEN_FUDGE 0
176 /* Forward declarations. */
182 /* External declarations. */
184 extern char *getenv ();
185 extern FILE *fdopen ();
186 extern char *version_string;
187 extern struct tm *localtime ();
189 #ifndef HAVE_STRERROR
191 #if defined(bsd4_4) || defined(__NetBSD__)
192 extern const char *const sys_errlist[];
194 extern char *sys_errlist[];
196 #else /* HAVE_STERRROR */
200 char *strerror (int,...);
202 extern int parse_escape ();
208 /* Forward declarations. */
215 #if defined(USG) || defined(VMS)
223 /* These functions are declared to return int instead of void since they
224 are going to be placed in a table and some old compilers have trouble with
225 pointers to functions returning void. */
227 static int do_define ();
228 static int do_line ();
229 static int do_include ();
230 static int do_undef ();
231 static int do_error ();
232 static int do_pragma ();
233 static int do_ident ();
235 static int do_xifdef ();
236 static int do_else ();
237 static int do_elif ();
238 static int do_endif ();
239 static int do_sccs ();
240 static int do_once ();
241 static int do_assert ();
242 static int do_unassert ();
243 static int do_warning ();
245 static void add_import ();
246 static void append_include_chain ();
247 static void deps_output ();
248 static void make_undef ();
249 static void make_definition ();
250 static void make_assertion ();
251 static void path_include ();
252 static void initialize_builtins ();
253 static void initialize_char_syntax ();
254 static void dump_arg_n ();
255 static void dump_defn_1 ();
256 static void delete_macro ();
257 static void trigraph_pcp ();
258 static void rescan ();
259 static void finclude ();
260 static void validate_else ();
261 static int comp_def_part ();
262 static void error_from_errno ();
263 static void error_with_line ();
265 void pedwarn_with_line ();
266 static void pedwarn_with_file_and_line ();
267 static void fatal ();
269 static void pfatal_with_name ();
270 static void perror_with_name ();
271 static void pipe_closed ();
272 static void print_containing_files ();
273 static int lookup_import ();
274 static int redundant_include_p ();
275 static is_system_include ();
276 static struct file_name_map *read_name_map ();
277 static char *read_filename_string ();
278 static int open_include_file ();
279 static int check_preconditions ();
280 static void pcfinclude ();
281 static void pcstring_used ();
282 static void write_output ();
283 static int check_macro_name ();
284 static int compare_defs ();
285 static int compare_token_lists ();
286 static int eval_if_expression ();
287 static int discard_comments ();
288 static int change_newlines ();
289 static int line_for_error ();
291 static int file_size_and_mode ();
293 static struct arglist *read_token_list ();
294 static void free_token_list ();
296 static struct hashnode *install ();
297 struct hashnode *lookup ();
299 static struct assertion_hashnode *assertion_install ();
300 static struct assertion_hashnode *assertion_lookup ();
302 static char *xrealloc ();
303 static char *xcalloc ();
304 static char *savestring ();
306 static void delete_assertion ();
307 static void macroexpand ();
308 static void dump_all_macros ();
309 static void conditional_skip ();
310 static void skip_if_group ();
311 static void output_line_command ();
313 /* Last arg to output_line_command. */
314 enum file_change_code {same_file, enter_file, leave_file};
316 static int grow_outbuf ();
317 static int handle_directive ();
318 static void memory_full ();
320 static U_CHAR *macarg1 ();
321 static char *macarg ();
323 static U_CHAR *skip_to_end_of_comment ();
324 static U_CHAR *skip_quoted_string ();
325 static U_CHAR *skip_paren_group ();
326 static char *quote_string ();
328 static char *check_precompiled ();
329 /* static struct macrodef create_definition (); [moved below] */
330 static void dump_single_macro ();
331 static void output_dots ();
333 #ifndef FAILURE_EXIT_CODE
334 #define FAILURE_EXIT_CODE 33 /* gnu cc command understands this */
337 #ifndef SUCCESS_EXIT_CODE
338 #define SUCCESS_EXIT_CODE 0 /* 0 means success on Unix. */
341 /* Name under which this program was invoked. */
343 static char *progname;
345 /* Nonzero means use extra default include directories for C++. */
347 static int cplusplus;
349 /* Nonzero means handle cplusplus style comments */
351 static int cplusplus_comments;
353 /* Nonzero means handle #import, for objective C. */
357 /* Nonzero means this is an assembly file, and allow
358 unknown directives, which could be comments. */
362 /* Current maximum length of directory names in the search path
363 for include files. (Altered as we get more of them.) */
365 static int max_include_len;
367 /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */
369 static int for_lint = 0;
371 /* Nonzero means copy comments into the output file. */
373 static int put_out_comments = 0;
375 /* Nonzero means don't process the ANSI trigraph sequences. */
377 static int no_trigraphs = 0;
379 /* Nonzero means print the names of included files rather than
380 the preprocessed output. 1 means just the #include "...",
381 2 means #include <...> as well. */
383 static int print_deps = 0;
385 /* Nonzero if missing .h files in -M output are assumed to be generated
386 files and not errors. */
388 static int print_deps_missing_files = 0;
390 /* Nonzero means print names of header files (-H). */
392 static int print_include_names = 0;
394 /* Nonzero means don't output line number information. */
396 static int no_line_commands;
398 /* Nonzero means output the text in failing conditionals,
399 inside #failed ... #endfailed. */
401 static int output_conditionals;
403 /* dump_only means inhibit output of the preprocessed text
404 and instead output the definitions of all user-defined
405 macros in a form suitable for use as input to cccp.
406 dump_names means pass #define and the macro name through to output.
407 dump_definitions means pass the whole definition (plus #define) through
410 static enum {dump_none, dump_only, dump_names, dump_definitions}
411 dump_macros = dump_none;
413 /* Nonzero means pass all #define and #undef directives which we actually
414 process through to the output stream. This feature is used primarily
415 to allow cc1 to record the #defines and #undefs for the sake of
416 debuggers which understand about preprocessor macros, but it may
417 also be useful with -E to figure out how symbols are defined, and
418 where they are defined. */
419 static int debug_output = 0;
421 /* Nonzero indicates special processing used by the pcp program. The
422 special effects of this mode are:
424 Inhibit all macro expansion, except those inside #if directives.
426 Process #define directives normally, and output their contents
429 Output preconditions to pcp_outfile indicating all the relevant
430 preconditions for use of this file in a later cpp run.
432 static FILE *pcp_outfile;
434 /* Nonzero means we are inside an IF during a -pcp run. In this mode
435 macro expansion is done, and preconditions are output for all macro
436 uses requiring them. */
437 static int pcp_inside_if;
439 /* Nonzero means never to include precompiled files.
440 This is 1 since there's no way now to make precompiled files,
441 so it's not worth testing for them. */
442 static int no_precomp = 1;
444 /* Nonzero means give all the error messages the ANSI standard requires. */
448 /* Nonzero means try to make failure to fit ANSI C an error. */
450 static int pedantic_errors;
452 /* Nonzero means don't print warning messages. -w. */
454 static int inhibit_warnings = 0;
456 /* Nonzero means warn if slash-star appears in a comment. */
458 static int warn_comments;
460 /* Nonzero means warn if a macro argument is (or would be)
461 stringified with -traditional. */
463 static int warn_stringify;
465 /* Nonzero means warn if there are any trigraphs. */
467 static int warn_trigraphs;
469 /* Nonzero means warn if #import is used. */
471 static int warn_import = 1;
473 /* Nonzero means turn warnings into errors. */
475 static int warnings_are_errors;
477 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
481 /* Nonzero causes output not to be done,
482 but directives such as #define that have side effects
485 static int no_output;
487 /* Nonzero means this file was included with a -imacros or -include
488 command line and should not be recorded as an include file. */
490 static int no_record_file;
492 /* Nonzero means that we have finished processing the command line options.
493 This flag is used to decide whether or not to issue certain errors
496 static int done_initializing = 0;
498 /* Line where a newline was first seen in a string constant. */
500 static int multiline_string_line = 0;
502 /* I/O buffer structure.
503 The `fname' field is nonzero for source files and #include files
504 and for the dummy text used for -D and -U.
505 It is zero for rescanning results of macro expansion
506 and for expanding macro arguments. */
507 #define INPUT_STACK_MAX 400
508 static struct file_buf {
510 /* Filename specified with #line command. */
512 /* Record where in the search path this file was found.
513 For #include_next. */
514 struct file_name_list *dir;
519 /* Macro that this level is the expansion of.
520 Included so that we can reenable the macro
521 at the end of this level. */
522 struct hashnode *macro;
523 /* Value of if_stack at start of this file.
524 Used to prohibit unmatched #endif (etc) in an include file. */
525 struct if_stack *if_stack;
526 /* Object to be freed at end of input at this level. */
528 /* True if this is a header file included using <FILENAME>. */
529 char system_header_p;
530 } instack[INPUT_STACK_MAX];
532 static int last_error_tick; /* Incremented each time we print it. */
533 static int input_file_stack_tick; /* Incremented when the status changes. */
535 /* Current nesting level of input sources.
536 `instack[indepth]' is the level currently being read. */
537 static int indepth = -1;
538 #define CHECK_DEPTH(code) \
539 if (indepth >= (INPUT_STACK_MAX - 1)) \
541 error_with_line (line_for_error (instack[indepth].lineno), \
542 "macro or `#include' recursion too deep"); \
546 /* Current depth in #include directives that use <...>. */
547 static int system_include_depth = 0;
549 typedef struct file_buf FILE_BUF;
551 /* The output buffer. Its LENGTH field is the amount of room allocated
552 for the buffer, not the number of chars actually present. To get
553 that, subtract outbuf.buf from outbuf.bufp. */
555 #define OUTBUF_SIZE 10 /* initial size of output buffer */
556 static FILE_BUF outbuf;
558 /* Grow output buffer OBUF points at
559 so it can hold at least NEEDED more chars. */
561 #define check_expand(OBUF, NEEDED) \
562 (((OBUF)->length - ((OBUF)->bufp - (OBUF)->buf) <= (NEEDED)) \
563 ? grow_outbuf ((OBUF), (NEEDED)) : 0)
565 struct file_name_list
567 struct file_name_list *next;
569 /* If the following is nonzero, it is a macro name.
570 Don't include the file again if that macro is defined. */
571 U_CHAR *control_macro;
572 /* If the following is nonzero, it is a C-language system include
574 int c_system_include_path;
575 /* Mapping of file names for this directory. */
576 struct file_name_map *name_map;
577 /* Non-zero if name_map is valid. */
581 /* #include "file" looks in source file dir, then stack. */
582 /* #include <file> just looks in the stack. */
583 /* -I directories are added to the end, then the defaults are added. */
585 static struct default_include {
586 char *fname; /* The name of the directory. */
587 int cplusplus; /* Only look here if we're compiling C++. */
588 int cxx_aware; /* Includes in this directory don't need to
589 be wrapped in extern "C" when compiling
591 } include_defaults_array[]
592 #ifdef INCLUDE_DEFAULTS
596 /* Pick up GNU C++ specific include files. */
597 { GPLUSPLUS_INCLUDE_DIR, 1, 1 },
599 /* This is the dir for fixincludes. Put it just before
600 the files that we fix. */
601 { GCC_INCLUDE_DIR, 0, 0 },
602 /* For cross-compilation, this dir name is generated
603 automatically in Makefile.in. */
604 { CROSS_INCLUDE_DIR, 0, 0 },
605 /* This is another place that the target system's headers might be. */
606 { TOOL_INCLUDE_DIR, 0, 1 },
607 #else /* not CROSS_COMPILE */
608 /* This should be /usr/local/include and should come before
609 the fixincludes-fixed header files. */
610 { LOCAL_INCLUDE_DIR, 0, 1 },
611 /* This is here ahead of GCC_INCLUDE_DIR because assert.h goes here.
612 Likewise, behind LOCAL_INCLUDE_DIR, where glibc puts its assert.h. */
613 { TOOL_INCLUDE_DIR, 0, 1 },
614 /* This is the dir for fixincludes. Put it just before
615 the files that we fix. */
616 { GCC_INCLUDE_DIR, 0, 0 },
617 /* Some systems have an extra dir of include files. */
618 #ifdef SYSTEM_INCLUDE_DIR
619 { SYSTEM_INCLUDE_DIR, 0, 0 },
621 { STANDARD_INCLUDE_DIR, 0, 0 },
622 #endif /* not CROSS_COMPILE */
625 #endif /* no INCLUDE_DEFAULTS */
627 /* The code looks at the defaults through this pointer, rather than through
628 the constant structure above. This pointer gets changed if an environment
629 variable specifies other defaults. */
630 static struct default_include *include_defaults = include_defaults_array;
632 static struct file_name_list *include = 0; /* First dir to search */
633 /* First dir to search for <file> */
634 /* This is the first element to use for #include <...>.
635 If it is 0, use the entire chain for such includes. */
636 static struct file_name_list *first_bracket_include = 0;
637 /* This is the first element in the chain that corresponds to
638 a directory of system header files. */
639 static struct file_name_list *first_system_include = 0;
640 static struct file_name_list *last_include = 0; /* Last in chain */
642 /* Chain of include directories to put at the end of the other chain. */
643 static struct file_name_list *after_include = 0;
644 static struct file_name_list *last_after_include = 0; /* Last in chain */
646 /* Chain to put at the start of the system include files. */
647 static struct file_name_list *before_system = 0;
648 static struct file_name_list *last_before_system = 0; /* Last in chain */
650 /* List of included files that contained #pragma once. */
651 static struct file_name_list *dont_repeat_files = 0;
653 /* List of other included files.
654 If ->control_macro if nonzero, the file had a #ifndef
655 around the entire contents, and ->control_macro gives the macro name. */
656 static struct file_name_list *all_include_files = 0;
658 /* Directory prefix that should replace `/usr' in the standard
659 include file directories. */
660 static char *include_prefix;
662 /* Global list of strings read in from precompiled files. This list
663 is kept in the order the strings are read in, with new strings being
664 added at the end through stringlist_tailp. We use this list to output
665 the strings at the end of the run.
667 static STRINGDEF *stringlist;
668 static STRINGDEF **stringlist_tailp = &stringlist;
671 /* Structure returned by create_definition */
672 typedef struct macrodef MACRODEF;
675 struct definition *defn;
680 static struct macrodef create_definition ();
683 /* Structure allocated for every #define. For a simple replacement
686 nargs = -1, the `pattern' list is null, and the expansion is just
687 the replacement text. Nargs = 0 means a functionlike macro with no args,
689 #define getchar() getc (stdin) .
690 When there are args, the expansion is the replacement text with the
691 args squashed out, and the reflist is a list describing how to
692 build the output from the input: e.g., "3 chars, then the 1st arg,
693 then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
694 The chars here come from the expansion. Whatever is left of the
695 expansion after the last arg-occurrence is copied after that arg.
696 Note that the reflist can be arbitrarily long---
697 its length depends on the number of times the arguments appear in
698 the replacement text, not how many args there are. Example:
699 #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
701 { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
702 where (x, y) means (nchars, argno). */
704 typedef struct definition DEFINITION;
707 int length; /* length of expansion string */
708 int predefined; /* True if the macro was builtin or */
709 /* came from the command line */
711 int line; /* Line number of definition */
712 char *file; /* File of definition */
713 char rest_args; /* Nonzero if last arg. absorbs the rest */
715 struct reflist *next;
716 char stringify; /* nonzero if this arg was preceded by a
718 char raw_before; /* Nonzero if a ## operator before arg. */
719 char raw_after; /* Nonzero if a ## operator after arg. */
720 char rest_args; /* Nonzero if this arg. absorbs the rest */
721 int nchars; /* Number of literal chars to copy before
722 this arg occurrence. */
723 int argno; /* Number of arg to substitute (origin-0) */
726 /* Names of macro args, concatenated in reverse order
727 with comma-space between them.
728 The only use of this is that we warn on redefinition
729 if this differs between the old and new definitions. */
734 /* different kinds of things that can appear in the value field
735 of a hash node. Actually, this may be useless now. */
744 * special extension string that can be added to the last macro argument to
745 * allow it to absorb the "rest" of the arguments when expanded. Ex:
746 * #define wow(a, b...) process (b, a, b)
747 * { wow (1, 2, 3); } -> { process (2, 3, 1, 2, 3); }
748 * { wow (one, two); } -> { process (two, one, two); }
749 * if this "rest_arg" is used with the concat token '##' and if it is not
750 * supplied then the token attached to with ## will not be outputted. Ex:
751 * #define wow (a, b...) process (b ## , a, ## b)
752 * { wow (1, 2); } -> { process (2, 1, 2); }
753 * { wow (one); } -> { process (one); {
755 static char rest_extension[] = "...";
756 #define REST_EXTENSION_LENGTH (sizeof (rest_extension) - 1)
758 /* The structure of a node in the hash table. The hash table
759 has entries for all tokens defined by #define commands (type T_MACRO),
760 plus some special tokens like __LINE__ (these each have their own
761 type, and the appropriate code is run when that type of node is seen.
762 It does not contain control words like "#define", which are recognized
763 by a separate piece of code. */
765 /* different flavors of hash nodes --- also used in keyword table */
767 T_DEFINE = 1, /* the `#define' keyword */
768 T_INCLUDE, /* the `#include' keyword */
769 T_INCLUDE_NEXT, /* the `#include_next' keyword */
770 T_IMPORT, /* the `#import' keyword */
771 T_IFDEF, /* the `#ifdef' keyword */
772 T_IFNDEF, /* the `#ifndef' keyword */
773 T_IF, /* the `#if' keyword */
774 T_ELSE, /* `#else' */
775 T_PRAGMA, /* `#pragma' */
776 T_ELIF, /* `#elif' */
777 T_UNDEF, /* `#undef' */
778 T_LINE, /* `#line' */
779 T_ERROR, /* `#error' */
780 T_WARNING, /* `#warning' */
781 T_ENDIF, /* `#endif' */
782 T_SCCS, /* `#sccs', used on system V. */
783 T_IDENT, /* `#ident', used on system V. */
784 T_ASSERT, /* `#assert', taken from system V. */
785 T_UNASSERT, /* `#unassert', taken from system V. */
786 T_SPECLINE, /* special symbol `__LINE__' */
787 T_DATE, /* `__DATE__' */
788 T_FILE, /* `__FILE__' */
789 T_BASE_FILE, /* `__BASE_FILE__' */
790 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
791 T_VERSION, /* `__VERSION__' */
792 T_SIZE_TYPE, /* `__SIZE_TYPE__' */
793 T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */
794 T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */
795 T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */
796 T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */
797 T_TIME, /* `__TIME__' */
798 T_CONST, /* Constant value, used by `__STDC__' */
799 T_MACRO, /* macro defined by `#define' */
800 T_DISABLED, /* macro temporarily turned off for rescan */
801 T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */
802 T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */
803 T_UNUSED /* Used for something not defined. */
807 struct hashnode *next; /* double links for easy deletion */
808 struct hashnode *prev;
809 struct hashnode **bucket_hdr; /* also, a back pointer to this node's hash
810 chain is kept, in case the node is the head
811 of the chain and gets deleted. */
812 enum node_type type; /* type of special token */
813 int length; /* length of token, for quick comparison */
814 U_CHAR *name; /* the actual name */
815 union hashval value; /* pointer to expansion, or whatever */
818 typedef struct hashnode HASHNODE;
820 /* Some definitions for the hash table. The hash function MUST be
821 computed as shown in hashf () below. That is because the rescan
822 loop computes the hash value `on the fly' for most tokens,
823 in order to avoid the overhead of a lot of procedure calls to
824 the hashf () function. Hashf () only exists for the sake of
825 politeness, for use when speed isn't so important. */
827 #define HASHSIZE 1403
828 static HASHNODE *hashtab[HASHSIZE];
829 #define HASHSTEP(old, c) ((old << 2) + c)
830 #define MAKE_POS(v) (v & 0x7fffffff) /* make number positive */
832 /* Symbols to predefine. */
834 #ifdef CPP_PREDEFINES
835 static char *predefs = CPP_PREDEFINES;
837 static char *predefs = "";
840 /* We let tm.h override the types used here, to handle trivial differences
841 such as the choice of unsigned int or long unsigned int for size_t.
842 When machines start needing nontrivial differences in the size type,
843 it would be best to do something here to figure out automatically
844 from other information what type to use. */
846 /* The string value for __SIZE_TYPE__. */
849 #define SIZE_TYPE "long unsigned int"
852 /* The string value for __PTRDIFF_TYPE__. */
855 #define PTRDIFF_TYPE "long int"
858 /* The string value for __WCHAR_TYPE__. */
861 #define WCHAR_TYPE "int"
863 char * wchar_type = WCHAR_TYPE;
866 /* The string value for __USER_LABEL_PREFIX__ */
868 #ifndef USER_LABEL_PREFIX
869 #define USER_LABEL_PREFIX ""
872 /* The string value for __REGISTER_PREFIX__ */
874 #ifndef REGISTER_PREFIX
875 #define REGISTER_PREFIX ""
878 /* In the definition of a #assert name, this structure forms
879 a list of the individual values asserted.
880 Each value is itself a list of "tokens".
881 These are strings that are compared by name. */
883 struct tokenlist_list {
884 struct tokenlist_list *next;
885 struct arglist *tokens;
888 struct assertion_hashnode {
889 struct assertion_hashnode *next; /* double links for easy deletion */
890 struct assertion_hashnode *prev;
891 /* also, a back pointer to this node's hash
892 chain is kept, in case the node is the head
893 of the chain and gets deleted. */
894 struct assertion_hashnode **bucket_hdr;
895 int length; /* length of token, for quick comparison */
896 U_CHAR *name; /* the actual name */
897 /* List of token-sequences. */
898 struct tokenlist_list *value;
901 typedef struct assertion_hashnode ASSERTION_HASHNODE;
903 /* Some definitions for the hash table. The hash function MUST be
904 computed as shown in hashf below. That is because the rescan
905 loop computes the hash value `on the fly' for most tokens,
906 in order to avoid the overhead of a lot of procedure calls to
907 the hashf function. hashf only exists for the sake of
908 politeness, for use when speed isn't so important. */
910 #define ASSERTION_HASHSIZE 37
911 static ASSERTION_HASHNODE *assertion_hashtab[ASSERTION_HASHSIZE];
913 /* Nonzero means inhibit macroexpansion of what seem to be
914 assertion tests, in rescan. For #if. */
915 static int assertions_flag;
917 /* `struct directive' defines one #-directive, including how to handle it. */
920 int length; /* Length of name */
921 int (*func)(); /* Function to handle directive */
922 char *name; /* Name of directive */
923 enum node_type type; /* Code which describes which directive. */
924 char angle_brackets; /* Nonzero => <...> is special. */
925 char traditional_comments; /* Nonzero: keep comments if -traditional. */
926 char pass_thru; /* Copy preprocessed directive to output file. */
929 /* Here is the actual list of #-directives, most-often-used first. */
931 static struct directive directive_table[] = {
932 { 6, do_define, "define", T_DEFINE, 0, 1},
933 { 2, do_if, "if", T_IF},
934 { 5, do_xifdef, "ifdef", T_IFDEF},
935 { 6, do_xifdef, "ifndef", T_IFNDEF},
936 { 5, do_endif, "endif", T_ENDIF},
937 { 4, do_else, "else", T_ELSE},
938 { 4, do_elif, "elif", T_ELIF},
939 { 4, do_line, "line", T_LINE},
940 { 7, do_include, "include", T_INCLUDE, 1},
941 { 12, do_include, "include_next", T_INCLUDE_NEXT, 1},
942 { 6, do_include, "import", T_IMPORT, 1},
943 { 5, do_undef, "undef", T_UNDEF},
944 { 5, do_error, "error", T_ERROR},
945 { 7, do_warning, "warning", T_WARNING},
946 #ifdef SCCS_DIRECTIVE
947 { 4, do_sccs, "sccs", T_SCCS},
949 { 6, do_pragma, "pragma", T_PRAGMA, 0, 0, 1},
950 { 5, do_ident, "ident", T_IDENT},
951 { 6, do_assert, "assert", T_ASSERT},
952 { 8, do_unassert, "unassert", T_UNASSERT},
953 { -1, 0, "", T_UNUSED},
956 /* When a directive handler is called,
957 this points to the # that started the directive. */
958 U_CHAR *directive_start;
960 /* table to tell if char can be part of a C identifier. */
961 U_CHAR is_idchar[256];
962 /* table to tell if char can be first char of a c identifier. */
963 U_CHAR is_idstart[256];
964 /* table to tell if c is horizontal space. */
965 U_CHAR is_hor_space[256];
966 /* table to tell if c is horizontal or vertical space. */
967 static U_CHAR is_space[256];
969 #define SKIP_WHITE_SPACE(p) do { while (is_hor_space[*p]) p++; } while (0)
970 #define SKIP_ALL_WHITE_SPACE(p) do { while (is_space[*p]) p++; } while (0)
972 static int errors = 0; /* Error counter for exit code */
974 /* Name of output file, for error messages. */
975 static char *out_fname;
977 /* Zero means dollar signs are punctuation.
978 -$ stores 0; -traditional may store 1. Default is 1 for VMS, 0 otherwise.
979 This must be 0 for correct processing of this ANSI C program:
981 #define lose(b) foo (b)
984 static int dollars_in_ident;
985 #ifndef DOLLARS_IN_IDENTIFIERS
986 #define DOLLARS_IN_IDENTIFIERS 1
989 static FILE_BUF expand_to_temp_buffer ();
991 static DEFINITION *collect_expansion ();
993 /* Stack of conditionals currently in progress
994 (including both successful and failing conditionals). */
997 struct if_stack *next; /* for chaining to the next stack frame */
998 char *fname; /* copied from input when frame is made */
999 int lineno; /* similarly */
1000 int if_succeeded; /* true if a leg of this if-group
1001 has been passed through rescan */
1002 U_CHAR *control_macro; /* For #ifndef at start of file,
1003 this is the macro name tested. */
1004 enum node_type type; /* type of last directive seen in this group */
1006 typedef struct if_stack IF_STACK_FRAME;
1007 static IF_STACK_FRAME *if_stack = NULL;
1009 /* Buffer of -M output. */
1010 static char *deps_buffer;
1012 /* Number of bytes allocated in above. */
1013 static int deps_allocated_size;
1015 /* Number of bytes used. */
1016 static int deps_size;
1018 /* Number of bytes since the last newline. */
1019 static int deps_column;
1021 /* Nonzero means -I- has been seen,
1022 so don't look for #include "foo" the source-file directory. */
1023 static int ignore_srcdir;
1025 /* Read LEN bytes at PTR from descriptor DESC, for file FILENAME,
1026 retrying if necessary. Return a negative value if an error occurs,
1027 otherwise return the actual number of bytes read,
1028 which must be LEN unless end-of-file was reached. */
1031 safe_read (desc, ptr, len)
1038 int nchars = read (desc, ptr, left);
1055 /* Write LEN bytes at PTR to descriptor DESC,
1056 retrying if necessary, and treating any real error as fatal. */
1059 safe_write (desc, ptr, len)
1065 int written = write (desc, ptr, len);
1072 pfatal_with_name (out_fname);
1090 char **pend_files = (char **) xmalloc (argc * sizeof (char *));
1091 char **pend_defs = (char **) xmalloc (argc * sizeof (char *));
1092 char **pend_undefs = (char **) xmalloc (argc * sizeof (char *));
1093 char **pend_assertions = (char **) xmalloc (argc * sizeof (char *));
1094 char **pend_includes = (char **) xmalloc (argc * sizeof (char *));
1096 /* Record the option used with each element of pend_assertions.
1097 This is preparation for supporting more than one option for making
1099 char **pend_assertion_options = (char **) xmalloc (argc * sizeof (char *));
1100 int inhibit_predefs = 0;
1101 int no_standard_includes = 0;
1102 int no_standard_cplusplus_includes = 0;
1103 int missing_newline = 0;
1105 /* Non-0 means don't output the preprocessed program. */
1106 int inhibit_output = 0;
1107 /* Non-0 means -v, so print the full set of include dirs. */
1110 /* File name which deps are being written to.
1111 This is 0 if deps are being written to stdout. */
1112 char *deps_file = 0;
1113 /* Fopen file mode to open deps_file with. */
1114 char *deps_mode = "a";
1115 /* Stream on which to print the dependency information. */
1116 FILE *deps_stream = 0;
1117 /* Target-name to write with the dependency information. */
1118 char *deps_target = 0;
1121 /* Get rid of any avoidable limit on stack size. */
1125 /* Set the stack limit huge so that alloca (particularly stringtab
1126 * in dbxread.c) does not fail. */
1127 getrlimit (RLIMIT_STACK, &rlim);
1128 rlim.rlim_cur = rlim.rlim_max;
1129 setrlimit (RLIMIT_STACK, &rlim);
1131 #endif /* RLIMIT_STACK defined */
1134 signal (SIGPIPE, pipe_closed);
1137 p = argv[0] + strlen (argv[0]);
1138 while (p != argv[0] && p[-1] != '/') --p;
1143 /* Remove directories from PROGNAME. */
1146 progname = savestring (argv[0]);
1148 if (!(s = rindex (progname, ']')))
1149 s = rindex (progname, ':');
1151 strcpy (progname, s+1);
1152 if (s = rindex (progname, '.'))
1160 /* Initialize is_idchar to allow $. */
1161 dollars_in_ident = 1;
1162 initialize_char_syntax ();
1163 dollars_in_ident = DOLLARS_IN_IDENTIFIERS > 0;
1165 no_line_commands = 0;
1167 dump_macros = dump_none;
1170 cplusplus_comments = 0;
1172 bzero ((char *) pend_files, argc * sizeof (char *));
1173 bzero ((char *) pend_defs, argc * sizeof (char *));
1174 bzero ((char *) pend_undefs, argc * sizeof (char *));
1175 bzero ((char *) pend_assertions, argc * sizeof (char *));
1176 bzero ((char *) pend_includes, argc * sizeof (char *));
1178 /* Process switches and find input file name. */
1180 for (i = 1; i < argc; i++) {
1181 if (argv[i][0] != '-') {
1182 if (out_fname != NULL)
1183 fatal ("Usage: %s [switches] input output", argv[0]);
1184 else if (in_fname != NULL)
1185 out_fname = argv[i];
1189 switch (argv[i][1]) {
1192 if (!strcmp (argv[i], "-include")) {
1194 fatal ("Filename missing after `-include' option");
1196 pend_includes[i] = argv[i+1], i++;
1198 if (!strcmp (argv[i], "-imacros")) {
1200 fatal ("Filename missing after `-imacros' option");
1202 pend_files[i] = argv[i+1], i++;
1204 if (!strcmp (argv[i], "-iprefix")) {
1206 fatal ("Filename missing after `-iprefix' option");
1208 include_prefix = argv[++i];
1210 if (!strcmp (argv[i], "-ifoutput")) {
1211 output_conditionals = 1;
1213 if (!strcmp (argv[i], "-isystem")) {
1214 struct file_name_list *dirtmp;
1217 fatal ("Filename missing after `-isystem' option");
1219 dirtmp = (struct file_name_list *)
1220 xmalloc (sizeof (struct file_name_list));
1222 dirtmp->control_macro = 0;
1223 dirtmp->c_system_include_path = 1;
1224 dirtmp->fname = (char *) xmalloc (strlen (argv[i+1]) + 1);
1225 strcpy (dirtmp->fname, argv[++i]);
1226 dirtmp->got_name_map = 0;
1228 if (before_system == 0)
1229 before_system = dirtmp;
1231 last_before_system->next = dirtmp;
1232 last_before_system = dirtmp; /* Tail follows the last one */
1234 /* Add directory to end of path for includes,
1235 with the default prefix at the front of its name. */
1236 if (!strcmp (argv[i], "-iwithprefix")) {
1237 struct file_name_list *dirtmp;
1240 if (include_prefix != 0)
1241 prefix = include_prefix;
1243 prefix = savestring (GCC_INCLUDE_DIR);
1244 /* Remove the `include' from /usr/local/lib/gcc.../include. */
1245 if (!strcmp (prefix + strlen (prefix) - 8, "/include"))
1246 prefix[strlen (prefix) - 7] = 0;
1249 dirtmp = (struct file_name_list *)
1250 xmalloc (sizeof (struct file_name_list));
1251 dirtmp->next = 0; /* New one goes on the end */
1252 dirtmp->control_macro = 0;
1253 dirtmp->c_system_include_path = 0;
1255 fatal ("Directory name missing after `-iwithprefix' option");
1257 dirtmp->fname = (char *) xmalloc (strlen (argv[i+1])
1258 + strlen (prefix) + 1);
1259 strcpy (dirtmp->fname, prefix);
1260 strcat (dirtmp->fname, argv[++i]);
1261 dirtmp->got_name_map = 0;
1263 if (after_include == 0)
1264 after_include = dirtmp;
1266 last_after_include->next = dirtmp;
1267 last_after_include = dirtmp; /* Tail follows the last one */
1269 /* Add directory to main path for includes,
1270 with the default prefix at the front of its name. */
1271 if (!strcmp (argv[i], "-iwithprefixbefore")) {
1272 struct file_name_list *dirtmp;
1275 if (include_prefix != 0)
1276 prefix = include_prefix;
1278 prefix = savestring (GCC_INCLUDE_DIR);
1279 /* Remove the `include' from /usr/local/lib/gcc.../include. */
1280 if (!strcmp (prefix + strlen (prefix) - 8, "/include"))
1281 prefix[strlen (prefix) - 7] = 0;
1284 dirtmp = (struct file_name_list *)
1285 xmalloc (sizeof (struct file_name_list));
1286 dirtmp->next = 0; /* New one goes on the end */
1287 dirtmp->control_macro = 0;
1288 dirtmp->c_system_include_path = 0;
1290 fatal ("Directory name missing after `-iwithprefixbefore' option");
1292 dirtmp->fname = (char *) xmalloc (strlen (argv[i+1])
1293 + strlen (prefix) + 1);
1294 strcpy (dirtmp->fname, prefix);
1295 strcat (dirtmp->fname, argv[++i]);
1296 dirtmp->got_name_map = 0;
1298 append_include_chain (dirtmp, dirtmp);
1300 /* Add directory to end of path for includes. */
1301 if (!strcmp (argv[i], "-idirafter")) {
1302 struct file_name_list *dirtmp;
1304 dirtmp = (struct file_name_list *)
1305 xmalloc (sizeof (struct file_name_list));
1306 dirtmp->next = 0; /* New one goes on the end */
1307 dirtmp->control_macro = 0;
1308 dirtmp->c_system_include_path = 0;
1310 fatal ("Directory name missing after `-idirafter' option");
1312 dirtmp->fname = argv[++i];
1313 dirtmp->got_name_map = 0;
1315 if (after_include == 0)
1316 after_include = dirtmp;
1318 last_after_include->next = dirtmp;
1319 last_after_include = dirtmp; /* Tail follows the last one */
1324 if (out_fname != NULL)
1325 fatal ("Output filename specified twice");
1327 fatal ("Filename missing after -o option");
1328 out_fname = argv[++i];
1329 if (!strcmp (out_fname, "-"))
1334 if (!strcmp (argv[i], "-pedantic"))
1336 else if (!strcmp (argv[i], "-pedantic-errors")) {
1338 pedantic_errors = 1;
1339 } else if (!strcmp (argv[i], "-pcp")) {
1342 fatal ("Filename missing after -pcp option");
1343 pcp_fname = argv[++i];
1345 ((pcp_fname[0] != '-' || pcp_fname[1] != '\0')
1346 ? fopen (pcp_fname, "w")
1347 : fdopen (dup (fileno (stdout)), "w"));
1348 if (pcp_outfile == 0)
1349 pfatal_with_name (pcp_fname);
1355 if (!strcmp (argv[i], "-traditional")) {
1357 if (dollars_in_ident > 0)
1358 dollars_in_ident = 1;
1359 } else if (!strcmp (argv[i], "-trigraphs")) {
1365 if (! strcmp (argv[i], "-lang-c"))
1366 cplusplus = 0, cplusplus_comments = 0, objc = 0;
1367 if (! strcmp (argv[i], "-lang-c++"))
1368 cplusplus = 1, cplusplus_comments = 1, objc = 0;
1369 if (! strcmp (argv[i], "-lang-c-c++-comments"))
1370 cplusplus = 0, cplusplus_comments = 1, objc = 0;
1371 if (! strcmp (argv[i], "-lang-objc"))
1372 objc = 1, cplusplus = 0, cplusplus_comments = 1;
1373 if (! strcmp (argv[i], "-lang-objc++"))
1374 objc = 1, cplusplus = 1, cplusplus_comments = 1;
1375 if (! strcmp (argv[i], "-lang-asm"))
1377 if (! strcmp (argv[i], "-lint"))
1382 cplusplus = 1, cplusplus_comments = 1;
1386 inhibit_warnings = 1;
1390 if (!strcmp (argv[i], "-Wtrigraphs"))
1392 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1394 else if (!strcmp (argv[i], "-Wcomment"))
1396 else if (!strcmp (argv[i], "-Wno-comment"))
1398 else if (!strcmp (argv[i], "-Wcomments"))
1400 else if (!strcmp (argv[i], "-Wno-comments"))
1402 else if (!strcmp (argv[i], "-Wtraditional"))
1404 else if (!strcmp (argv[i], "-Wno-traditional"))
1406 else if (!strcmp (argv[i], "-Wimport"))
1408 else if (!strcmp (argv[i], "-Wno-import"))
1410 else if (!strcmp (argv[i], "-Werror"))
1411 warnings_are_errors = 1;
1412 else if (!strcmp (argv[i], "-Wno-error"))
1413 warnings_are_errors = 0;
1414 else if (!strcmp (argv[i], "-Wall"))
1422 /* The style of the choices here is a bit mixed.
1423 The chosen scheme is a hybrid of keeping all options in one string
1424 and specifying each option in a separate argument:
1425 -M|-MM|-MD file|-MMD file [-MG]. An alternative is:
1426 -M|-MM|-MD file|-MMD file|-MG|-MMG; or more concisely:
1427 -M[M][G][D file]. This is awkward to handle in specs, and is not
1429 /* ??? -MG must be specified in addition to one of -M or -MM.
1430 This can be relaxed in the future without breaking anything.
1431 The converse isn't true. */
1433 /* -MG isn't valid with -MD or -MMD. This is checked for later. */
1434 if (!strcmp (argv[i], "-MG"))
1436 print_deps_missing_files = 1;
1439 if (!strcmp (argv[i], "-M"))
1441 else if (!strcmp (argv[i], "-MM"))
1443 else if (!strcmp (argv[i], "-MD"))
1445 else if (!strcmp (argv[i], "-MMD"))
1447 /* For -MD and -MMD options, write deps on file named by next arg. */
1448 if (!strcmp (argv[i], "-MD")
1449 || !strcmp (argv[i], "-MMD")) {
1451 fatal ("Filename missing after %s option", argv[i]);
1453 deps_file = argv[i];
1456 /* For -M and -MM, write deps on standard output
1457 and suppress the usual output. */
1458 deps_stream = stdout;
1465 char *p = argv[i] + 2;
1468 /* Arg to -d specifies what parts of macros to dump */
1471 dump_macros = dump_only;
1475 dump_macros = dump_names;
1478 dump_macros = dump_definitions;
1486 if (argv[i][2] == '3')
1491 fprintf (stderr, "GNU CPP version %s", version_string);
1492 #ifdef TARGET_VERSION
1495 fprintf (stderr, "\n");
1500 print_include_names = 1;
1504 if (argv[i][2] != 0)
1505 pend_defs[i] = argv[i] + 2;
1506 else if (i + 1 == argc)
1507 fatal ("Macro name missing after -D option");
1509 i++, pend_defs[i] = argv[i];
1516 if (argv[i][2] != 0)
1518 else if (i + 1 == argc)
1519 fatal ("Assertion missing after -A option");
1523 if (!strcmp (p, "-")) {
1524 /* -A- eliminates all predefined macros and assertions.
1525 Let's include also any that were specified earlier
1526 on the command line. That way we can get rid of any
1527 that were passed automatically in from GCC. */
1529 inhibit_predefs = 1;
1530 for (j = 0; j < i; j++)
1531 pend_defs[j] = pend_assertions[j] = 0;
1533 pend_assertions[i] = p;
1534 pend_assertion_options[i] = "-A";
1539 case 'U': /* JF #undef something */
1540 if (argv[i][2] != 0)
1541 pend_undefs[i] = argv[i] + 2;
1542 else if (i + 1 == argc)
1543 fatal ("Macro name missing after -U option");
1545 pend_undefs[i] = argv[i+1], i++;
1549 put_out_comments = 1;
1552 case 'E': /* -E comes from cc -E; ignore it. */
1556 no_line_commands = 1;
1559 case '$': /* Don't include $ in identifiers. */
1560 dollars_in_ident = 0;
1563 case 'I': /* Add directory to path for includes. */
1565 struct file_name_list *dirtmp;
1567 if (! ignore_srcdir && !strcmp (argv[i] + 2, "-")) {
1569 /* Don't use any preceding -I directories for #include <...>. */
1570 first_bracket_include = 0;
1573 dirtmp = (struct file_name_list *)
1574 xmalloc (sizeof (struct file_name_list));
1575 dirtmp->next = 0; /* New one goes on the end */
1576 dirtmp->control_macro = 0;
1577 dirtmp->c_system_include_path = 0;
1578 if (argv[i][2] != 0)
1579 dirtmp->fname = argv[i] + 2;
1580 else if (i + 1 == argc)
1581 fatal ("Directory name missing after -I option");
1583 dirtmp->fname = argv[++i];
1584 dirtmp->got_name_map = 0;
1585 append_include_chain (dirtmp, dirtmp);
1591 if (!strcmp (argv[i], "-nostdinc"))
1592 /* -nostdinc causes no default include directories.
1593 You must specify all include-file directories with -I. */
1594 no_standard_includes = 1;
1595 else if (!strcmp (argv[i], "-nostdinc++"))
1596 /* -nostdinc++ causes no default C++-specific include directories. */
1597 no_standard_cplusplus_includes = 1;
1598 else if (!strcmp (argv[i], "-noprecomp"))
1603 /* Sun compiler passes undocumented switch "-undef".
1604 Let's assume it means to inhibit the predefined symbols. */
1605 inhibit_predefs = 1;
1608 case '\0': /* JF handle '-' as file name meaning stdin or stdout */
1609 if (in_fname == NULL) {
1612 } else if (out_fname == NULL) {
1615 } /* else fall through into error */
1618 fatal ("Invalid option `%s'", argv[i]);
1623 /* Add dirs from CPATH after dirs from -I. */
1624 /* There seems to be confusion about what CPATH should do,
1625 so for the moment it is not documented. */
1626 /* Some people say that CPATH should replace the standard include dirs,
1627 but that seems pointless: it comes before them, so it overrides them
1629 p = (char *) getenv ("CPATH");
1630 if (p != 0 && ! no_standard_includes)
1633 /* Now that dollars_in_ident is known, initialize is_idchar. */
1634 initialize_char_syntax ();
1636 /* Initialize output buffer */
1638 outbuf.buf = (U_CHAR *) xmalloc (OUTBUF_SIZE);
1639 outbuf.bufp = outbuf.buf;
1640 outbuf.length = OUTBUF_SIZE;
1642 /* Do partial setup of input buffer for the sake of generating
1643 early #line directives (when -g is in effect). */
1645 fp = &instack[++indepth];
1646 if (in_fname == NULL)
1648 fp->nominal_fname = fp->fname = in_fname;
1651 /* In C++, wchar_t is a distinct basic type, and we can expect
1652 __wchar_t to be defined by cc1plus. */
1654 wchar_type = "__wchar_t";
1656 /* Install __LINE__, etc. Must follow initialize_char_syntax
1657 and option processing. */
1658 initialize_builtins (fp, &outbuf);
1660 /* Do standard #defines and assertions
1661 that identify system and machine type. */
1663 if (!inhibit_predefs) {
1664 char *p = (char *) alloca (strlen (predefs) + 1);
1665 strcpy (p, predefs);
1668 while (*p == ' ' || *p == '\t')
1670 /* Handle -D options. */
1671 if (p[0] == '-' && p[1] == 'D') {
1673 while (*p && *p != ' ' && *p != '\t')
1678 output_line_command (fp, &outbuf, 0, same_file);
1679 make_definition (q, &outbuf);
1680 while (*p == ' ' || *p == '\t')
1682 } else if (p[0] == '-' && p[1] == 'A') {
1683 /* Handle -A options (assertions). */
1692 past_name = assertion;
1693 /* Locate end of name. */
1694 while (*past_name && *past_name != ' '
1695 && *past_name != '\t' && *past_name != '(')
1697 /* Locate `(' at start of value. */
1699 while (*value && (*value == ' ' || *value == '\t'))
1701 if (*value++ != '(')
1703 while (*value && (*value == ' ' || *value == '\t'))
1706 /* Locate end of value. */
1707 while (*past_value && *past_value != ' '
1708 && *past_value != '\t' && *past_value != ')')
1710 termination = past_value;
1711 while (*termination && (*termination == ' ' || *termination == '\t'))
1713 if (*termination++ != ')')
1715 if (*termination && *termination != ' ' && *termination != '\t')
1717 /* Temporarily null-terminate the value. */
1718 save_char = *termination;
1719 *termination = '\0';
1720 /* Install the assertion. */
1721 make_assertion ("-A", assertion);
1722 *termination = (char) save_char;
1724 while (*p == ' ' || *p == '\t')
1732 /* Now handle the command line options. */
1734 /* Do -U's, -D's and -A's in the order they were seen. */
1735 for (i = 1; i < argc; i++) {
1736 if (pend_undefs[i]) {
1738 output_line_command (fp, &outbuf, 0, same_file);
1739 make_undef (pend_undefs[i], &outbuf);
1743 output_line_command (fp, &outbuf, 0, same_file);
1744 make_definition (pend_defs[i], &outbuf);
1746 if (pend_assertions[i])
1747 make_assertion (pend_assertion_options[i], pend_assertions[i]);
1750 done_initializing = 1;
1752 { /* read the appropriate environment variable and if it exists
1753 replace include_defaults with the listed path. */
1755 switch ((objc << 1) + cplusplus)
1758 epath = getenv ("C_INCLUDE_PATH");
1761 epath = getenv ("CPLUS_INCLUDE_PATH");
1764 epath = getenv ("OBJC_INCLUDE_PATH");
1767 epath = getenv ("OBJCPLUS_INCLUDE_PATH");
1770 /* If the environment var for this language is set,
1771 add to the default list of include directories. */
1773 char *nstore = (char *) alloca (strlen (epath) + 2);
1775 char *startp, *endp;
1777 for (num_dirs = 1, startp = epath; *startp; startp++)
1778 if (*startp == PATH_SEPARATOR)
1781 = (struct default_include *) xmalloc ((num_dirs
1782 * sizeof (struct default_include))
1783 + sizeof (include_defaults_array));
1784 startp = endp = epath;
1787 /* Handle cases like c:/usr/lib:d:/gcc/lib */
1788 if ((*endp == PATH_SEPARATOR
1789 #if 0 /* Obsolete, now that we use semicolons as the path separator. */
1791 && (endp-startp != 1 || !isalpha (*startp))
1796 strncpy (nstore, startp, endp-startp);
1798 strcpy (nstore, ".");
1800 nstore[endp-startp] = '\0';
1802 include_defaults[num_dirs].fname = savestring (nstore);
1803 include_defaults[num_dirs].cplusplus = cplusplus;
1804 include_defaults[num_dirs].cxx_aware = 1;
1808 endp = startp = endp + 1;
1812 /* Put the usual defaults back in at the end. */
1813 bcopy ((char *) include_defaults_array,
1814 (char *) &include_defaults[num_dirs],
1815 sizeof (include_defaults_array));
1819 append_include_chain (before_system, last_before_system);
1820 first_system_include = before_system;
1822 /* Unless -fnostdinc,
1823 tack on the standard include file dirs to the specified list */
1824 if (!no_standard_includes) {
1825 struct default_include *p = include_defaults;
1826 char *specd_prefix = include_prefix;
1827 char *default_prefix = savestring (GCC_INCLUDE_DIR);
1828 int default_len = 0;
1829 /* Remove the `include' from /usr/local/lib/gcc.../include. */
1830 if (!strcmp (default_prefix + strlen (default_prefix) - 8, "/include")) {
1831 default_len = strlen (default_prefix) - 7;
1832 default_prefix[default_len] = 0;
1834 /* Search "translated" versions of GNU directories.
1835 These have /usr/local/lib/gcc... replaced by specd_prefix. */
1836 if (specd_prefix != 0 && default_len != 0)
1837 for (p = include_defaults; p->fname; p++) {
1838 /* Some standard dirs are only for C++. */
1839 if (!p->cplusplus || (cplusplus && !no_standard_cplusplus_includes)) {
1840 /* Does this dir start with the prefix? */
1841 if (!strncmp (p->fname, default_prefix, default_len)) {
1842 /* Yes; change prefix and add to search list. */
1843 struct file_name_list *new
1844 = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
1845 int this_len = strlen (specd_prefix) + strlen (p->fname) - default_len;
1846 char *str = (char *) xmalloc (this_len + 1);
1847 strcpy (str, specd_prefix);
1848 strcat (str, p->fname + default_len);
1850 new->control_macro = 0;
1851 new->c_system_include_path = !p->cxx_aware;
1852 new->got_name_map = 0;
1853 append_include_chain (new, new);
1854 if (first_system_include == 0)
1855 first_system_include = new;
1859 /* Search ordinary names for GNU include directories. */
1860 for (p = include_defaults; p->fname; p++) {
1861 /* Some standard dirs are only for C++. */
1862 if (!p->cplusplus || (cplusplus && !no_standard_cplusplus_includes)) {
1863 struct file_name_list *new
1864 = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
1865 new->control_macro = 0;
1866 new->c_system_include_path = !p->cxx_aware;
1867 new->fname = p->fname;
1868 new->got_name_map = 0;
1869 append_include_chain (new, new);
1870 if (first_system_include == 0)
1871 first_system_include = new;
1876 /* Tack the after_include chain at the end of the include chain. */
1877 append_include_chain (after_include, last_after_include);
1878 if (first_system_include == 0)
1879 first_system_include = after_include;
1881 /* With -v, print the list of dirs to search. */
1883 struct file_name_list *p;
1884 fprintf (stderr, "#include \"...\" search starts here:\n");
1885 for (p = include; p; p = p->next) {
1886 if (p == first_bracket_include)
1887 fprintf (stderr, "#include <...> search starts here:\n");
1888 fprintf (stderr, " %s\n", p->fname);
1890 fprintf (stderr, "End of search list.\n");
1893 /* Scan the -imacros files before the main input.
1894 Much like #including them, but with no_output set
1895 so that only their macro definitions matter. */
1897 no_output++; no_record_file++;
1898 for (i = 1; i < argc; i++)
1899 if (pend_files[i]) {
1900 int fd = open (pend_files[i], O_RDONLY, 0666);
1902 perror_with_name (pend_files[i]);
1903 return FAILURE_EXIT_CODE;
1905 finclude (fd, pend_files[i], &outbuf, 0, NULL_PTR);
1907 no_output--; no_record_file--;
1909 /* Copy the entire contents of the main input file into
1910 the stacked input buffer previously allocated for it. */
1912 /* JF check for stdin */
1913 if (in_fname == NULL || *in_fname == 0) {
1916 } else if ((f = open (in_fname, O_RDONLY, 0666)) < 0)
1919 /* -MG doesn't select the form of output and must be specified with one of
1920 -M or -MM. -MG doesn't make sense with -MD or -MMD since they don't
1921 inhibit compilation. */
1922 if (print_deps_missing_files && (print_deps == 0 || !inhibit_output))
1923 fatal ("-MG must be specified with one of -M or -MM");
1925 /* Either of two environment variables can specify output of deps.
1926 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1927 where OUTPUT_FILE is the file to write deps info to
1928 and DEPS_TARGET is the target to mention in the deps. */
1931 && (getenv ("SUNPRO_DEPENDENCIES") != 0
1932 || getenv ("DEPENDENCIES_OUTPUT") != 0)) {
1933 char *spec = getenv ("DEPENDENCIES_OUTPUT");
1938 spec = getenv ("SUNPRO_DEPENDENCIES");
1945 /* Find the space before the DEPS_TARGET, if there is one. */
1946 /* This should use index. (mrs) */
1947 while (*s != 0 && *s != ' ') s++;
1949 deps_target = s + 1;
1950 output_file = (char *) xmalloc (s - spec + 1);
1951 bcopy (spec, output_file, s - spec);
1952 output_file[s - spec] = 0;
1959 deps_file = output_file;
1963 /* For -M, print the expected object file name
1964 as the target of this Make-rule. */
1966 deps_allocated_size = 200;
1967 deps_buffer = (char *) xmalloc (deps_allocated_size);
1973 deps_output (deps_target, ':');
1974 } else if (*in_fname == 0) {
1975 deps_output ("-", ':');
1980 /* Discard all directory prefixes from filename. */
1981 if ((q = rindex (in_fname, '/')) != NULL)
1986 /* Copy remainder to mungable area. */
1987 p = (char *) alloca (strlen(q) + 8);
1990 /* Output P, but remove known suffixes. */
1994 && p[len - 2] == '.'
1995 && index("cCsSm", p[len - 1]))
1998 && p[len - 3] == '.'
1999 && p[len - 2] == 'c'
2000 && p[len - 1] == 'c')
2003 && p[len - 4] == '.'
2004 && p[len - 3] == 'c'
2005 && p[len - 2] == 'x'
2006 && p[len - 1] == 'x')
2009 && p[len - 4] == '.'
2010 && p[len - 3] == 'c'
2011 && p[len - 2] == 'p'
2012 && p[len - 1] == 'p')
2015 /* Supply our own suffix. */
2022 deps_output (p, ':');
2023 deps_output (in_fname, ' ');
2027 file_size_and_mode (f, &st_mode, &st_size);
2028 fp->nominal_fname = fp->fname = in_fname;
2030 fp->system_header_p = 0;
2031 /* JF all this is mine about reading pipes and ttys */
2032 if (! S_ISREG (st_mode)) {
2033 /* Read input from a file that is not a normal disk file.
2034 We cannot preallocate a buffer with the correct size,
2035 so we must read in the file a piece at the time and make it bigger. */
2042 fp->buf = (U_CHAR *) xmalloc (bsize + 2);
2044 cnt = safe_read (f, fp->buf + size, bsize - size);
2045 if (cnt < 0) goto perror; /* error! */
2047 if (size != bsize) break; /* End of file */
2049 fp->buf = (U_CHAR *) xrealloc (fp->buf, bsize + 2);
2053 /* Read a file whose size we can determine in advance.
2054 For the sake of VMS, st_size is just an upper bound. */
2055 fp->buf = (U_CHAR *) xmalloc (st_size + 2);
2056 fp->length = safe_read (f, fp->buf, st_size);
2057 if (fp->length < 0) goto perror;
2060 fp->if_stack = if_stack;
2062 /* Make sure data ends with a newline. And put a null after it. */
2064 if ((fp->length > 0 && fp->buf[fp->length - 1] != '\n')
2065 /* Backslash-newline at end is not good enough. */
2066 || (fp->length > 1 && fp->buf[fp->length - 2] == '\\')) {
2067 fp->buf[fp->length++] = '\n';
2068 missing_newline = 1;
2070 fp->buf[fp->length] = '\0';
2072 /* Unless inhibited, convert trigraphs in the input. */
2077 /* Now that we know the input file is valid, open the output. */
2079 if (!out_fname || !strcmp (out_fname, ""))
2080 out_fname = "stdout";
2081 else if (! freopen (out_fname, "w", stdout))
2082 pfatal_with_name (out_fname);
2084 output_line_command (fp, &outbuf, 0, same_file);
2086 /* Scan the -include files before the main input. */
2089 for (i = 1; i < argc; i++)
2090 if (pend_includes[i]) {
2091 int fd = open (pend_includes[i], O_RDONLY, 0666);
2093 perror_with_name (pend_includes[i]);
2094 return FAILURE_EXIT_CODE;
2096 finclude (fd, pend_includes[i], &outbuf, 0, NULL_PTR);
2100 /* Scan the input, processing macros and directives. */
2102 rescan (&outbuf, 0);
2104 if (missing_newline)
2107 if (pedantic && missing_newline)
2108 pedwarn ("file does not end in newline");
2110 /* Now we have processed the entire input
2111 Write whichever kind of output has been requested. */
2113 if (dump_macros == dump_only)
2115 else if (! inhibit_output) {
2120 /* Don't actually write the deps file if compilation has failed. */
2122 if (deps_file && ! (deps_stream = fopen (deps_file, deps_mode)))
2123 pfatal_with_name (deps_file);
2124 fputs (deps_buffer, deps_stream);
2125 putc ('\n', deps_stream);
2127 if (ferror (deps_stream) || fclose (deps_stream) != 0)
2128 fatal ("I/O error on output");
2133 if (pcp_outfile && pcp_outfile != stdout
2134 && (ferror (pcp_outfile) || fclose (pcp_outfile) != 0))
2135 fatal ("I/O error on `-pcp' output");
2137 if (ferror (stdout) || fclose (stdout) != 0)
2138 fatal ("I/O error on output");
2141 exit (FAILURE_EXIT_CODE);
2142 exit (SUCCESS_EXIT_CODE);
2145 pfatal_with_name (in_fname);
2149 /* Given a colon-separated list of file names PATH,
2150 add all the names to the search path for include files. */
2164 struct file_name_list *dirtmp;
2166 /* Find the end of this name. */
2167 while (*q != 0 && *q != PATH_SEPARATOR) q++;
2169 /* An empty name in the path stands for the current directory. */
2170 name = (char *) xmalloc (2);
2174 /* Otherwise use the directory that is named. */
2175 name = (char *) xmalloc (q - p + 1);
2176 bcopy (p, name, q - p);
2180 dirtmp = (struct file_name_list *)
2181 xmalloc (sizeof (struct file_name_list));
2182 dirtmp->next = 0; /* New one goes on the end */
2183 dirtmp->control_macro = 0;
2184 dirtmp->c_system_include_path = 0;
2185 dirtmp->fname = name;
2186 dirtmp->got_name_map = 0;
2187 append_include_chain (dirtmp, dirtmp);
2189 /* Advance past this name. */
2193 /* Skip the colon. */
2198 /* Return the address of the first character in S that equals C.
2199 S is an array of length N, possibly containing '\0's, and followed by '\0'.
2200 Return 0 if there is no such character. Assume that C itself is not '\0'.
2201 If we knew we could use memchr, we could just invoke memchr (S, C, N),
2202 but unfortunately memchr isn't autoconfigured yet. */
2211 char *q = index (s, c);
2213 return (U_CHAR *) q;
2225 /* Pre-C-Preprocessor to translate ANSI trigraph idiocy in BUF
2226 before main CCCP processing. Name `pcp' is also in honor of the
2227 drugs the trigraph designers must have been on.
2229 Using an extra pass through the buffer takes a little extra time,
2230 but is infinitely less hairy than trying to handle trigraphs inside
2231 strings, etc. everywhere, and also makes sure that trigraphs are
2232 only translated in the top level of processing. */
2238 register U_CHAR c, *fptr, *bptr, *sptr, *lptr;
2241 fptr = bptr = sptr = buf->buf;
2242 lptr = fptr + buf->length;
2243 while ((sptr = (U_CHAR *) index0 (sptr, '?', lptr - sptr)) != NULL) {
2280 len = sptr - fptr - 2;
2282 /* BSD doc says bcopy () works right for overlapping strings. In ANSI
2283 C, this will be memmove (). */
2284 if (bptr != fptr && len > 0)
2285 bcopy ((char *) fptr, (char *) bptr, len);
2291 len = buf->length - (fptr - buf->buf);
2292 if (bptr != fptr && len > 0)
2293 bcopy ((char *) fptr, (char *) bptr, len);
2294 buf->length -= fptr - bptr;
2295 buf->buf[buf->length] = '\0';
2296 if (warn_trigraphs && fptr != bptr)
2297 warning ("%d trigraph(s) encountered", (fptr - bptr) / 2);
2300 /* Move all backslash-newline pairs out of embarrassing places.
2301 Exchange all such pairs following BP
2302 with any potentially-embarrassing characters that follow them.
2303 Potentially-embarrassing characters are / and *
2304 (because a backslash-newline inside a comment delimiter
2305 would cause it not to be recognized). */
2311 register U_CHAR *p = bp;
2312 register int count = 0;
2314 /* First count the backslash-newline pairs here. */
2320 else if (p[1] == '\r' && p[2] == '\n')
2328 /* What follows the backslash-newlines is not embarrassing. */
2330 if (count == 0 || (*p != '/' && *p != '*'))
2333 /* Copy all potentially embarrassing characters
2334 that follow the backslash-newline pairs
2335 down to where the pairs originally started. */
2337 while (*p == '*' || *p == '/')
2340 /* Now write the same number of pairs after the embarrassing chars. */
2341 while (count-- > 0) {
2347 /* Like newline_fix but for use within a directive-name.
2348 Move any backslash-newlines up past any following symbol constituents. */
2351 name_newline_fix (bp)
2354 register U_CHAR *p = bp;
2355 register int count = 0;
2357 /* First count the backslash-newline pairs here. */
2362 else if (p[1] == '\r' && p[2] == '\n')
2370 /* What follows the backslash-newlines is not embarrassing. */
2372 if (count == 0 || !is_idchar[*p])
2375 /* Copy all potentially embarrassing characters
2376 that follow the backslash-newline pairs
2377 down to where the pairs originally started. */
2379 while (is_idchar[*p])
2382 /* Now write the same number of pairs after the embarrassing chars. */
2383 while (count-- > 0) {
2389 /* Look for lint commands in comments.
2391 When we come in here, ibp points into a comment. Limit is as one expects.
2392 scan within the comment -- it should start, after lwsp, with a lint command.
2393 If so that command is returned as a (constant) string.
2395 Upon return, any arg will be pointed to with argstart and will be
2396 arglen long. Note that we don't parse that arg since it will just
2397 be printed out again.
2401 get_lintcmd (ibp, limit, argstart, arglen, cmdlen)
2402 register U_CHAR *ibp;
2403 register U_CHAR *limit;
2404 U_CHAR **argstart; /* point to command arg */
2405 int *arglen, *cmdlen; /* how long they are */
2408 register U_CHAR *numptr; /* temp for arg parsing */
2412 SKIP_WHITE_SPACE (ibp);
2414 if (ibp >= limit) return NULL;
2416 linsize = limit - ibp;
2418 /* Oh, I wish C had lexical functions... hell, I'll just open-code the set */
2419 if ((linsize >= 10) && !strncmp (ibp, "NOTREACHED", 10)) {
2421 return "NOTREACHED";
2423 if ((linsize >= 8) && !strncmp (ibp, "ARGSUSED", 8)) {
2427 if ((linsize >= 11) && !strncmp (ibp, "LINTLIBRARY", 11)) {
2429 return "LINTLIBRARY";
2431 if ((linsize >= 7) && !strncmp (ibp, "VARARGS", 7)) {
2433 ibp += 7; linsize -= 7;
2434 if ((linsize == 0) || ! isdigit (*ibp)) return "VARARGS";
2436 /* OK, read a number */
2437 for (numptr = *argstart = ibp; (numptr < limit) && isdigit (*numptr);
2439 *arglen = numptr - *argstart;
2446 * The main loop of the program.
2448 * Read characters from the input stack, transferring them to the
2451 * Macros are expanded and push levels on the input stack.
2452 * At the end of such a level it is popped off and we keep reading.
2453 * At the end of any other kind of level, we return.
2454 * #-directives are handled, except within macros.
2456 * If OUTPUT_MARKS is nonzero, keep Newline markers found in the input
2457 * and insert them when appropriate. This is set while scanning macro
2458 * arguments before substitution. It is zero when scanning for final output.
2459 * There are three types of Newline markers:
2460 * * Newline - follows a macro name that was not expanded
2461 * because it appeared inside an expansion of the same macro.
2462 * This marker prevents future expansion of that identifier.
2463 * When the input is rescanned into the final output, these are deleted.
2464 * These are also deleted by ## concatenation.
2465 * * Newline Space (or Newline and any other whitespace character)
2466 * stands for a place that tokens must be separated or whitespace
2467 * is otherwise desirable, but where the ANSI standard specifies there
2468 * is no whitespace. This marker turns into a Space (or whichever other
2469 * whitespace char appears in the marker) in the final output,
2470 * but it turns into nothing in an argument that is stringified with #.
2471 * Such stringified arguments are the only place where the ANSI standard
2472 * specifies with precision that whitespace may not appear.
2474 * During this function, IP->bufp is kept cached in IBP for speed of access.
2475 * Likewise, OP->bufp is kept in OBP. Before calling a subroutine
2476 * IBP, IP and OBP must be copied back to memory. IP and IBP are
2477 * copied back with the RECACHE macro. OBP must be copied back from OP->bufp
2478 * explicitly, and before RECACHE, since RECACHE uses OBP.
2482 rescan (op, output_marks)
2486 /* Character being scanned in main loop. */
2489 /* Length of pending accumulated identifier. */
2490 register int ident_length = 0;
2492 /* Hash code of pending accumulated identifier. */
2493 register int hash = 0;
2495 /* Current input level (&instack[indepth]). */
2498 /* Pointer for scanning input. */
2499 register U_CHAR *ibp;
2501 /* Pointer to end of input. End of scan is controlled by LIMIT. */
2502 register U_CHAR *limit;
2504 /* Pointer for storing output. */
2505 register U_CHAR *obp;
2507 /* REDO_CHAR is nonzero if we are processing an identifier
2508 after backing up over the terminating character.
2509 Sometimes we process an identifier without backing up over
2510 the terminating character, if the terminating character
2511 is not special. Backing up is done so that the terminating character
2512 will be dispatched on again once the identifier is dealt with. */
2515 /* 1 if within an identifier inside of which a concatenation
2516 marker (Newline -) has been seen. */
2517 int concatenated = 0;
2519 /* While scanning a comment or a string constant,
2520 this records the line it started on, for error messages. */
2523 /* Record position of last `real' newline. */
2524 U_CHAR *beg_of_line;
2526 /* Pop the innermost input stack level, assuming it is a macro expansion. */
2529 do { ip->macro->type = T_MACRO; \
2530 if (ip->free_ptr) free (ip->free_ptr); \
2531 --indepth; } while (0)
2533 /* Reload `rescan's local variables that describe the current
2534 level of the input stack. */
2537 do { ip = &instack[indepth]; \
2539 limit = ip->buf + ip->length; \
2541 check_expand (op, limit - ibp); \
2543 obp = op->bufp; } while (0)
2545 if (no_output && instack[indepth].fname != 0)
2546 skip_if_group (&instack[indepth], 1, NULL);
2553 /* Our caller must always put a null after the end of
2554 the input at each input stack level. */
2567 /* Always merge lines ending with backslash-newline,
2568 even in middle of identifier. */
2571 --obp; /* remove backslash from obuf */
2574 /* Otherwise, backslash suppresses specialness of following char,
2575 so copy it here to prevent the switch from seeing it.
2576 But first get any pending identifier processed. */
2577 if (ident_length > 0)
2583 if (assertions_flag) {
2584 /* Copy #foo (bar lose) without macro expansion. */
2585 SKIP_WHITE_SPACE (ibp);
2586 while (is_idchar[*ibp])
2588 SKIP_WHITE_SPACE (ibp);
2591 skip_paren_group (ip);
2592 bcopy ((char *) ibp, (char *) obp, ip->bufp - ibp);
2593 obp += ip->bufp - ibp;
2598 /* If this is expanding a macro definition, don't recognize
2599 preprocessor directives. */
2602 /* If this is expand_into_temp_buffer, recognize them
2603 only after an actual newline at this level,
2604 not at the beginning of the input level. */
2605 if (ip->fname == 0 && beg_of_line == ip->buf)
2611 /* # keyword: a # must be first nonblank char on the line */
2612 if (beg_of_line == 0)
2617 /* Scan from start of line, skipping whitespace, comments
2618 and backslash-newlines, and see if we reach this #.
2619 If not, this # is not special. */
2621 /* If -traditional, require # to be at beginning of line. */
2624 if (is_hor_space[*bp])
2626 else if (*bp == '\\' && bp[1] == '\n')
2628 else if (*bp == '/' && bp[1] == '*') {
2630 while (!(*bp == '*' && bp[1] == '/'))
2634 /* There is no point in trying to deal with C++ // comments here,
2635 because if there is one, then this # must be part of the
2636 comment and we would never reach here. */
2643 /* This # can start a directive. */
2645 --obp; /* Don't copy the '#' */
2649 if (! handle_directive (ip, op)) {
2653 /* Not a known directive: treat it as ordinary text.
2654 IP, OP, IBP, etc. have not been changed. */
2655 if (no_output && instack[indepth].fname) {
2656 /* If not generating expanded output,
2657 what we do with ordinary text is skip it.
2658 Discard everything until next # directive. */
2659 skip_if_group (&instack[indepth], 1, 0);
2664 ++obp; /* Copy the '#' after all */
2665 /* Don't expand an identifier that could be a macro directive.
2666 (Section 3.8.3 of the ANSI C standard) */
2667 SKIP_WHITE_SPACE (ibp);
2668 if (is_idstart[*ibp])
2671 while (is_idchar[*ibp])
2679 /* A # directive has been successfully processed. */
2680 /* If not generating expanded output, ignore everything until
2681 next # directive. */
2682 if (no_output && instack[indepth].fname)
2683 skip_if_group (&instack[indepth], 1, 0);
2689 case '\"': /* skip quoted string */
2691 /* A single quoted string is treated like a double -- some
2692 programs (e.g., troff) are perverse this way */
2697 start_line = ip->lineno;
2699 /* Skip ahead to a matching quote. */
2703 if (ip->macro != 0) {
2704 /* try harder: this string crosses a macro expansion boundary.
2705 This can happen naturally if -traditional.
2706 Otherwise, only -D can make a macro with an unmatched quote. */
2712 error_with_line (line_for_error (start_line),
2713 "unterminated string or character constant");
2714 error_with_line (multiline_string_line,
2715 "possible real start of unterminated constant");
2716 multiline_string_line = 0;
2725 /* Traditionally, end of line ends a string constant with no error.
2726 So exit the loop and record the new line. */
2732 error_with_line (line_for_error (start_line),
2733 "unterminated character constant");
2736 if (pedantic && multiline_string_line == 0) {
2737 pedwarn_with_line (line_for_error (start_line),
2738 "string constant runs past end of line");
2740 if (multiline_string_line == 0)
2741 multiline_string_line = ip->lineno - 1;
2748 /* Backslash newline is replaced by nothing at all,
2749 but keep the line counts correct. */
2754 /* ANSI stupidly requires that in \\ the second \
2755 is *not* prevented from combining with a newline. */
2756 while (*ibp == '\\' && ibp[1] == '\n') {
2775 if (*ibp == '\\' && ibp[1] == '\n')
2779 && !(cplusplus_comments && *ibp == '/'))
2787 /* C++ style comment... */
2788 start_line = ip->lineno;
2790 --ibp; /* Back over the slash */
2793 /* Comments are equivalent to spaces. */
2794 if (! put_out_comments)
2797 /* must fake up a comment here */
2802 U_CHAR *before_bp = ibp+2;
2804 while (ibp < limit) {
2805 if (ibp[-1] != '\\' && *ibp == '\n') {
2806 if (put_out_comments) {
2807 bcopy ((char *) before_bp, (char *) obp, ibp - before_bp);
2808 obp += ibp - before_bp;
2814 /* Copy the newline into the output buffer, in order to
2815 avoid the pain of a #line every time a multiline comment
2817 if (!put_out_comments)
2828 /* Ordinary C comment. Skip it, optionally copying it to output. */
2830 start_line = ip->lineno;
2832 ++ibp; /* Skip the star. */
2834 /* If this cpp is for lint, we peek inside the comments: */
2838 char *lintcmd = get_lintcmd (ibp, limit, &argbp, &arglen, &cmdlen);
2840 if (lintcmd != NULL) {
2842 check_expand (op, cmdlen + arglen + 14);
2844 /* I believe it is always safe to emit this newline: */
2846 bcopy ("#pragma lint ", (char *) obp, 13);
2848 bcopy (lintcmd, (char *) obp, cmdlen);
2853 bcopy (argbp, (char *) obp, arglen);
2857 /* OK, now bring us back to the state we were in before we entered
2858 this branch. We need #line because the #pragma's newline always
2859 messes up the line count. */
2861 output_line_command (ip, op, 0, same_file);
2862 check_expand (op, limit - ibp + 2);
2868 /* Comments are equivalent to spaces.
2869 Note that we already output the slash; we might not want it.
2870 For -traditional, a comment is equivalent to nothing. */
2871 if (! put_out_comments) {
2881 U_CHAR *before_bp = ibp;
2883 while (ibp < limit) {
2886 if (warn_comments && ibp < limit && *ibp == '*')
2887 warning ("`/*' within comment");
2890 if (*ibp == '\\' && ibp[1] == '\n')
2892 if (ibp >= limit || *ibp == '/')
2897 /* Copy the newline into the output buffer, in order to
2898 avoid the pain of a #line every time a multiline comment
2900 if (!put_out_comments)
2908 error_with_line (line_for_error (start_line),
2909 "unterminated comment");
2912 if (put_out_comments) {
2913 bcopy ((char *) before_bp, (char *) obp, ibp - before_bp);
2914 obp += ibp - before_bp;
2921 if (!dollars_in_ident)
2925 case '0': case '1': case '2': case '3': case '4':
2926 case '5': case '6': case '7': case '8': case '9':
2927 /* If digit is not part of identifier, it starts a number,
2928 which means that following letters are not an identifier.
2929 "0x5" does not refer to an identifier "x5".
2930 So copy all alphanumerics that follow without accumulating
2931 as an identifier. Periods also, for sake of "3.e7". */
2933 if (ident_length == 0) {
2934 while (ibp < limit) {
2935 while (ibp < limit && ibp[0] == '\\' && ibp[1] == '\n') {
2940 /* ".." terminates a preprocessing number. This is useless for C
2941 code but useful for preprocessing other things. */
2942 if (!isalnum (c) && (c != '.' || *ibp == '.') && c != '_') {
2947 /* A sign can be part of a preprocessing number
2948 if it follows an e. */
2949 if (c == 'e' || c == 'E') {
2950 while (ibp < limit && ibp[0] == '\\' && ibp[1] == '\n') {
2954 if (ibp < limit && (*ibp == '+' || *ibp == '-')) {
2956 /* But traditional C does not let the token go past the sign. */
2967 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
2968 case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
2969 case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
2970 case 's': case 't': case 'u': case 'v': case 'w': case 'x':
2972 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
2973 case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
2974 case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
2975 case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
2979 /* Compute step of hash function, to avoid a proc call on every token */
2980 hash = HASHSTEP (hash, c);
2984 if (ip->fname == 0 && *ibp == '-') {
2985 /* Newline - inhibits expansion of preceding token.
2986 If expanding a macro arg, we keep the newline -.
2987 In final output, it is deleted.
2988 We recognize Newline - in macro bodies and macro args. */
2989 if (! concatenated) {
2994 if (!output_marks) {
2997 /* If expanding a macro arg, keep the newline -. */
3003 /* If reprocessing a macro expansion, newline is a special marker. */
3004 else if (ip->macro != 0) {
3005 /* Newline White is a "funny space" to separate tokens that are
3006 supposed to be separate but without space between.
3007 Here White means any whitespace character.
3008 Newline - marks a recursive macro use that is not
3009 supposed to be expandable. */
3011 if (is_space[*ibp]) {
3012 /* Newline Space does not prevent expansion of preceding token
3013 so expand the preceding token and then come back. */
3014 if (ident_length > 0)
3017 /* If generating final output, newline space makes a space. */
3018 if (!output_marks) {
3020 /* And Newline Newline makes a newline, so count it. */
3021 if (obp[-1] == '\n')
3024 /* If expanding a macro arg, keep the newline space.
3025 If the arg gets stringified, newline space makes nothing. */
3028 } else abort (); /* Newline followed by something random? */
3032 /* If there is a pending identifier, handle it and come back here. */
3033 if (ident_length > 0)
3038 /* Update the line counts and output a #line if necessary. */
3041 if (ip->lineno != op->lineno) {
3043 output_line_command (ip, op, 1, same_file);
3044 check_expand (op, limit - ibp);
3049 /* Come here either after (1) a null character that is part of the input
3050 or (2) at the end of the input, because there is a null there. */
3053 /* Our input really contains a null character. */
3056 /* At end of a macro-expansion level, pop it and read next level. */
3057 if (ip->macro != 0) {
3060 /* If traditional, and we have an identifier that ends here,
3061 process it now, so we get the right error for recursion. */
3062 if (traditional && ident_length
3063 && ! is_idchar[*instack[indepth - 1].bufp]) {
3072 /* If we don't have a pending identifier,
3073 return at end of input. */
3074 if (ident_length == 0) {
3082 /* If we do have a pending identifier, just consider this null
3083 a special character and arrange to dispatch on it again.
3084 The second time, IDENT_LENGTH will be zero so we will return. */
3090 /* Handle the case of a character such as /, ', " or null
3091 seen following an identifier. Back over it so that
3092 after the identifier is processed the special char
3093 will be dispatched on again. */
3103 if (ident_length > 0) {
3104 register HASHNODE *hp;
3106 /* We have just seen an identifier end. If it's a macro, expand it.
3108 IDENT_LENGTH is the length of the identifier
3109 and HASH is its hash code.
3111 The identifier has already been copied to the output,
3112 so if it is a macro we must remove it.
3114 If REDO_CHAR is 0, the char that terminated the identifier
3115 has been skipped in the output and the input.
3116 OBP-IDENT_LENGTH-1 points to the identifier.
3117 If the identifier is a macro, we must back over the terminator.
3119 If REDO_CHAR is 1, the terminating char has already been
3120 backed over. OBP-IDENT_LENGTH points to the identifier. */
3122 if (!pcp_outfile || pcp_inside_if) {
3124 for (hp = hashtab[MAKE_POS (hash) % HASHSIZE]; hp != NULL;
3127 if (hp->length == ident_length) {
3128 int obufp_before_macroname;
3129 int op_lineno_before_macroname;
3130 register int i = ident_length;
3131 register U_CHAR *p = hp->name;
3132 register U_CHAR *q = obp - i;
3138 do { /* All this to avoid a strncmp () */
3143 /* We found a use of a macro name.
3144 see if the context shows it is a macro call. */
3146 /* Back up over terminating character if not already done. */
3152 /* Save this as a displacement from the beginning of the output
3153 buffer. We can not save this as a position in the output
3154 buffer, because it may get realloc'ed by RECACHE. */
3155 obufp_before_macroname = (obp - op->buf) - ident_length;
3156 op_lineno_before_macroname = op->lineno;
3158 if (hp->type == T_PCSTRING) {
3159 pcstring_used (hp); /* Mark the definition of this key
3160 as needed, ensuring that it
3162 break; /* Exit loop, since the key cannot have a
3163 definition any longer. */
3166 /* Record whether the macro is disabled. */
3167 disabled = hp->type == T_DISABLED;
3169 /* This looks like a macro ref, but if the macro was disabled,
3170 just copy its name and put in a marker if requested. */
3174 /* This error check caught useful cases such as
3175 #define foo(x,y) bar (x (y,0), y)
3178 error ("recursive use of macro `%s'", hp->name);
3182 check_expand (op, limit - ibp + 2);
3189 /* If macro wants an arglist, verify that a '(' follows.
3190 first skip all whitespace, copying it to the output
3191 after the macro name. Then, if there is no '(',
3192 decide this is not a macro call and leave things that way. */
3193 if ((hp->type == T_MACRO || hp->type == T_DISABLED)
3194 && hp->value.defn->nargs >= 0)
3196 U_CHAR *old_ibp = ibp;
3197 U_CHAR *old_obp = obp;
3198 int old_iln = ip->lineno;
3199 int old_oln = op->lineno;
3202 /* Scan forward over whitespace, copying it to the output. */
3203 if (ibp == limit && ip->macro != 0) {
3208 old_iln = ip->lineno;
3209 old_oln = op->lineno;
3211 /* A comment: copy it unchanged or discard it. */
3212 else if (*ibp == '/' && ibp+1 != limit && ibp[1] == '*') {
3213 if (put_out_comments) {
3216 } else if (! traditional) {
3220 while (ibp + 1 != limit
3221 && !(ibp[0] == '*' && ibp[1] == '/')) {
3222 /* We need not worry about newline-marks,
3223 since they are never found in comments. */
3225 /* Newline in a file. Count it. */
3229 if (put_out_comments)
3235 if (put_out_comments) {
3240 else if (is_space[*ibp]) {
3242 if (ibp[-1] == '\n') {
3243 if (ip->macro == 0) {
3244 /* Newline in a file. Count it. */
3247 } else if (!output_marks) {
3248 /* A newline mark, and we don't want marks
3249 in the output. If it is newline-hyphen,
3250 discard it entirely. Otherwise, it is
3251 newline-whitechar, so keep the whitechar. */
3261 /* A newline mark; copy both chars to the output. */
3269 /* It isn't a macro call.
3270 Put back the space that we just skipped. */
3273 ip->lineno = old_iln;
3274 op->lineno = old_oln;
3275 /* Exit the for loop. */
3280 /* This is now known to be a macro call.
3281 Discard the macro name from the output,
3282 along with any following whitespace just copied. */
3283 obp = op->buf + obufp_before_macroname;
3284 op->lineno = op_lineno_before_macroname;
3286 /* Prevent accidental token-pasting with a character
3287 before the macro call. */
3288 if (!traditional && obp != op->buf
3289 && (obp[-1] == '-' || obp[1] == '+' || obp[1] == '&'
3290 || obp[-1] == '|' || obp[1] == '<' || obp[1] == '>')) {
3291 /* If we are expanding a macro arg, make a newline marker
3292 to separate the tokens. If we are making real output,
3293 a plain space will do. */
3299 /* Expand the macro, reading arguments as needed,
3300 and push the expansion on the input stack. */
3303 macroexpand (hp, op);
3305 /* Reexamine input stack, since macroexpand has pushed
3306 a new level on it. */
3313 } /* End hash-table-search loop */
3315 ident_length = hash = 0; /* Stop collecting identifier */
3318 } /* End if (ident_length > 0) */
3320 } /* End per-char loop */
3322 /* Come here to return -- but first give an error message
3323 if there was an unterminated successful conditional. */
3325 if (if_stack != ip->if_stack)
3327 char *str = "unknown";
3329 switch (if_stack->type)
3348 error_with_line (line_for_error (if_stack->lineno),
3349 "unterminated `#%s' conditional", str);
3351 if_stack = ip->if_stack;
3355 * Rescan a string into a temporary buffer and return the result
3356 * as a FILE_BUF. Note this function returns a struct, not a pointer.
3358 * OUTPUT_MARKS nonzero means keep Newline markers found in the input
3359 * and insert such markers when appropriate. See `rescan' for details.
3360 * OUTPUT_MARKS is 1 for macroexpanding a macro argument separately
3361 * before substitution; it is 0 for other uses.
3364 expand_to_temp_buffer (buf, limit, output_marks, assertions)
3365 U_CHAR *buf, *limit;
3366 int output_marks, assertions;
3368 register FILE_BUF *ip;
3370 int length = limit - buf;
3372 int odepth = indepth;
3373 int save_assertions_flag = assertions_flag;
3375 assertions_flag = assertions;
3380 /* Set up the input on the input stack. */
3382 buf1 = (U_CHAR *) alloca (length + 1);
3384 register U_CHAR *p1 = buf;
3385 register U_CHAR *p2 = buf1;
3392 /* Set up to receive the output. */
3394 obuf.length = length * 2 + 100; /* Usually enough. Why be stingy? */
3395 obuf.bufp = obuf.buf = (U_CHAR *) xmalloc (obuf.length);
3400 CHECK_DEPTH ({return obuf;});
3404 ip = &instack[indepth];
3406 ip->nominal_fname = 0;
3407 ip->system_header_p = 0;
3410 ip->length = length;
3411 ip->buf = ip->bufp = buf1;
3412 ip->if_stack = if_stack;
3414 ip->lineno = obuf.lineno = 1;
3416 /* Scan the input, create the output. */
3417 rescan (&obuf, output_marks);
3419 /* Pop input stack to original state. */
3422 if (indepth != odepth)
3425 /* Record the output. */
3426 obuf.length = obuf.bufp - obuf.buf;
3428 assertions_flag = save_assertions_flag;
3433 * Process a # directive. Expects IP->bufp to point after the '#', as in
3434 * `#define foo bar'. Passes to the command handler
3435 * (do_define, do_include, etc.): the addresses of the 1st and
3436 * last chars of the command (starting immediately after the #
3437 * keyword), plus op and the keyword table pointer. If the command
3438 * contains comments it is copied into a temporary buffer sans comments
3439 * and the temporary buffer is passed to the command handler instead.
3440 * Likewise for backslash-newlines.
3442 * Returns nonzero if this was a known # directive.
3443 * Otherwise, returns zero, without advancing the input pointer.
3447 handle_directive (ip, op)
3450 register U_CHAR *bp, *cp;
3451 register struct directive *kt;
3452 register int ident_length;
3455 /* Nonzero means we must copy the entire command
3456 to get rid of comments or backslash-newlines. */
3457 int copy_command = 0;
3459 U_CHAR *ident, *after_ident;
3463 /* Record where the directive started. do_xifdef needs this. */
3464 directive_start = bp - 1;
3466 /* Skip whitespace and \-newline. */
3468 if (is_hor_space[*bp]) {
3469 if ((*bp == '\f' || *bp == '\v') && pedantic)
3470 pedwarn ("%s in preprocessing directive",
3471 *bp == '\f' ? "formfeed" : "vertical tab");
3473 } else if (*bp == '/' && (bp[1] == '*'
3474 || (cplusplus_comments && bp[1] == '/'))) {
3476 skip_to_end_of_comment (ip, &ip->lineno, 0);
3478 } else if (*bp == '\\' && bp[1] == '\n') {
3479 bp += 2; ip->lineno++;
3483 /* Now find end of directive name.
3484 If we encounter a backslash-newline, exchange it with any following
3485 symbol-constituents so that we end up with a contiguous name. */
3492 if (*cp == '\\' && cp[1] == '\n')
3493 name_newline_fix (cp);
3499 ident_length = cp - bp;
3503 /* A line of just `#' becomes blank. */
3505 if (ident_length == 0 && *after_ident == '\n') {
3506 ip->bufp = after_ident;
3510 if (ident_length == 0 || !is_idstart[*ident]) {
3512 while (is_idchar[*p]) {
3513 if (*p < '0' || *p > '9')
3517 /* Handle # followed by a line number. */
3518 if (p != ident && !is_idchar[*p]) {
3519 static struct directive line_directive_table[] = {
3520 { 4, do_line, "line", T_LINE},
3523 pedwarn ("`#' followed by integer");
3524 after_ident = ident;
3525 kt = line_directive_table;
3529 /* Avoid error for `###' and similar cases unless -pedantic. */
3531 while (*p == '#' || is_hor_space[*p]) p++;
3533 if (pedantic && !lang_asm)
3534 warning ("invalid preprocessor directive");
3540 error ("invalid preprocessor directive name");
3546 * Decode the keyword and call the appropriate expansion
3547 * routine, after moving the input pointer up to the next line.
3549 for (kt = directive_table; kt->length > 0; kt++) {
3550 if (kt->length == ident_length && !strncmp (kt->name, ident, ident_length)) {
3551 register U_CHAR *buf;
3552 register U_CHAR *limit;
3555 int *already_output;
3557 /* Nonzero means do not delete comments within the directive.
3558 #define needs this when -traditional. */
3563 limit = ip->buf + ip->length;
3566 keep_comments = traditional && kt->traditional_comments;
3567 /* #import is defined only in Objective C, or when on the NeXT. */
3568 if (kt->type == T_IMPORT && !(objc || lookup ("__NeXT__", -1, -1)))
3571 /* Find the end of this command (first newline not backslashed
3572 and not in a string or comment).
3573 Set COPY_COMMAND if the command must be copied
3574 (it contains a backslash-newline or a comment). */
3576 buf = bp = after_ident;
3577 while (bp < limit) {
3578 register U_CHAR c = *bp++;
3592 bp = skip_quoted_string (bp - 1, limit, ip->lineno, &ip->lineno, ©_command, &unterminated);
3593 /* Don't bother calling the directive if we already got an error
3594 message due to unterminated string. Skip everything and pretend
3595 we called the directive. */
3598 /* Traditional preprocessing permits unterminated strings. */
3607 /* <...> is special for #include. */
3609 if (!kt->angle_brackets)
3611 while (bp < limit && *bp != '>' && *bp != '\n') {
3612 if (*bp == '\\' && bp[1] == '\n') {
3622 if (*bp == '\\' && bp[1] == '\n')
3625 || (cplusplus_comments && *bp == '/')) {
3626 U_CHAR *obp = bp - 1;
3628 skip_to_end_of_comment (ip, &ip->lineno, 0);
3630 /* No need to copy the command because of a comment at the end;
3631 just don't include the comment in the directive. */
3632 if (bp == limit || *bp == '\n') {
3636 /* Don't remove the comments if -traditional. */
3637 if (! keep_comments)
3645 pedwarn ("%s in preprocessing directive",
3646 c == '\f' ? "formfeed" : "vertical tab");
3650 --bp; /* Point to the newline */
3658 resume_p = ip->bufp;
3659 /* BP is the end of the directive.
3660 RESUME_P is the next interesting data after the directive.
3661 A comment may come between. */
3663 /* If a directive should be copied through, and -E was given,
3664 pass it through before removing comments. */
3665 if (!no_output && kt->pass_thru && put_out_comments) {
3668 /* Output directive name. */
3669 check_expand (op, kt->length + 2);
3670 /* Make sure # is at the start of a line */
3671 if (op->bufp > op->buf && op->bufp[-1] != '\n') {
3676 bcopy (kt->name, op->bufp, kt->length);
3677 op->bufp += kt->length;
3679 /* Output arguments. */
3681 check_expand (op, len);
3682 bcopy (buf, (char *) op->bufp, len);
3684 /* Take account of any (escaped) newlines just output. */
3686 if (buf[len] == '\n')
3689 already_output = &junk;
3690 } /* Don't we need a newline or #line? */
3693 register U_CHAR *xp = buf;
3694 /* Need to copy entire command into temp buffer before dispatching */
3696 cp = (U_CHAR *) alloca (bp - buf + 5); /* room for cmd plus
3700 /* Copy to the new buffer, deleting comments
3701 and backslash-newlines (and whitespace surrounding the latter). */
3704 register U_CHAR c = *xp++;
3709 abort (); /* A bare newline should never part of the line. */
3712 /* <...> is special for #include. */
3714 if (!kt->angle_brackets)
3716 while (xp < bp && c != '>') {
3718 if (c == '\\' && xp < bp && *xp == '\n')
3729 if (cp != buf && is_space[cp[-1]]) {
3730 while (cp != buf && is_space[cp[-1]]) cp--;
3732 SKIP_WHITE_SPACE (xp);
3733 } else if (is_space[*xp]) {
3735 SKIP_WHITE_SPACE (xp);
3745 register U_CHAR *bp1
3746 = skip_quoted_string (xp - 1, bp, ip->lineno,
3747 NULL_PTR, NULL_PTR, NULL_PTR);
3761 || (cplusplus_comments && *xp == '/')) {
3763 /* If we already copied the command through,
3764 already_output != 0 prevents outputting comment now. */
3765 skip_to_end_of_comment (ip, already_output, 0);
3767 while (xp != ip->bufp)
3769 /* Delete or replace the slash. */
3770 else if (traditional)
3779 /* Null-terminate the copy. */
3785 ip->bufp = resume_p;
3787 /* Some directives should be written out for cc1 to process,
3788 just as if they were not defined. And sometimes we're copying
3789 definitions through. */
3791 if (!no_output && already_output == 0
3793 || (kt->type == T_DEFINE
3794 && (dump_macros == dump_names
3795 || dump_macros == dump_definitions)))) {
3798 /* Output directive name. */
3799 check_expand (op, kt->length + 1);
3801 bcopy (kt->name, (char *) op->bufp, kt->length);
3802 op->bufp += kt->length;
3804 if (kt->pass_thru || dump_macros == dump_definitions) {
3805 /* Output arguments. */
3807 check_expand (op, len);
3808 bcopy (buf, (char *) op->bufp, len);
3810 } else if (kt->type == T_DEFINE && dump_macros == dump_names) {
3813 SKIP_WHITE_SPACE (xp);
3815 while (is_idchar[*xp]) xp++;
3817 check_expand (op, len + 1);
3819 bcopy (yp, op->bufp, len);
3822 } /* Don't we need a newline or #line? */
3824 /* Call the appropriate command handler. buf now points to
3825 either the appropriate place in the input buffer, or to
3826 the temp buffer if it was necessary to make one. cp
3827 points to the first char after the contents of the (possibly
3828 copied) command, in either case. */
3829 (*kt->func) (buf, cp, op, kt);
3830 check_expand (op, ip->length - (ip->bufp - ip->buf));
3836 /* It is deliberate that we don't warn about undefined directives.
3837 That is the responsibility of cc1. */
3844 static struct tm *timebuf;
3846 time_t t = time (0);
3847 timebuf = localtime (&t);
3852 static char *monthnames[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
3853 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
3857 * expand things like __FILE__. Place the expansion into the output
3858 * buffer *without* rescanning.
3862 special_symbol (hp, op)
3869 FILE_BUF *ip = NULL;
3872 int paren = 0; /* For special `defined' keyword */
3874 if (pcp_outfile && pcp_inside_if
3875 && hp->type != T_SPEC_DEFINED && hp->type != T_CONST)
3876 error ("Predefined macro `%s' used inside `#if' during precompilation",
3879 for (i = indepth; i >= 0; i--)
3880 if (instack[i].fname != NULL) {
3885 error ("cccp error: not in any file?!");
3886 return; /* the show must go on */
3894 if (hp->type == T_FILE)
3895 string = ip->nominal_fname;
3897 string = instack[0].nominal_fname;
3901 buf = (char *) alloca (3 + 4 * strlen (string));
3902 quote_string (buf, string);
3910 case T_INCLUDE_LEVEL:
3912 for (i = indepth; i >= 0; i--)
3913 if (instack[i].fname != NULL)
3916 buf = (char *) alloca (8); /* Eight bytes ought to be more than enough */
3917 sprintf (buf, "%d", true_indepth - 1);
3921 buf = (char *) alloca (3 + strlen (version_string));
3922 sprintf (buf, "\"%s\"", version_string);
3925 #ifndef NO_BUILTIN_SIZE_TYPE
3931 #ifndef NO_BUILTIN_PTRDIFF_TYPE
3932 case T_PTRDIFF_TYPE:
3941 case T_USER_LABEL_PREFIX_TYPE:
3942 buf = USER_LABEL_PREFIX;
3945 case T_REGISTER_PREFIX_TYPE:
3946 buf = REGISTER_PREFIX;
3950 buf = (char *) alloca (4 * sizeof (int));
3951 sprintf (buf, "%d", hp->value.ival);
3952 if (pcp_inside_if && pcp_outfile)
3953 /* Output a precondition for this macro use */
3954 fprintf (pcp_outfile, "#define %s %d\n", hp->name, hp->value.ival);
3958 buf = (char *) alloca (10);
3959 sprintf (buf, "%d", ip->lineno);
3964 buf = (char *) alloca (20);
3965 timebuf = timestamp ();
3966 if (hp->type == T_DATE)
3967 sprintf (buf, "\"%s %2d %4d\"", monthnames[timebuf->tm_mon],
3968 timebuf->tm_mday, timebuf->tm_year + 1900);
3970 sprintf (buf, "\"%02d:%02d:%02d\"", timebuf->tm_hour, timebuf->tm_min,
3974 case T_SPEC_DEFINED:
3975 buf = " 0 "; /* Assume symbol is not defined */
3976 ip = &instack[indepth];
3977 SKIP_WHITE_SPACE (ip->bufp);
3978 if (*ip->bufp == '(') {
3980 ip->bufp++; /* Skip over the paren */
3981 SKIP_WHITE_SPACE (ip->bufp);
3984 if (!is_idstart[*ip->bufp])
3986 if (hp = lookup (ip->bufp, -1, -1)) {
3987 if (pcp_outfile && pcp_inside_if
3988 && (hp->type == T_CONST
3989 || (hp->type == T_MACRO && hp->value.defn->predefined)))
3990 /* Output a precondition for this macro use. */
3991 fprintf (pcp_outfile, "#define %s\n", hp->name);
3995 if (pcp_outfile && pcp_inside_if) {
3996 /* Output a precondition for this macro use */
3997 U_CHAR *cp = ip->bufp;
3998 fprintf (pcp_outfile, "#undef ");
3999 while (is_idchar[*cp]) /* Ick! */
4000 fputc (*cp++, pcp_outfile);
4001 putc ('\n', pcp_outfile);
4003 while (is_idchar[*ip->bufp])
4005 SKIP_WHITE_SPACE (ip->bufp);
4007 if (*ip->bufp != ')')
4015 error ("`defined' without an identifier");
4019 error ("cccp error: invalid special hash type"); /* time for gdb */
4023 check_expand (op, len);
4024 bcopy (buf, (char *) op->bufp, len);
4031 /* Routines to handle #directives */
4033 /* Handle #include and #import.
4034 This function expects to see "fname" or <fname> on the input. */
4037 do_include (buf, limit, op, keyword)
4038 U_CHAR *buf, *limit;
4040 struct directive *keyword;
4042 int importing = (keyword->type == T_IMPORT);
4043 int skip_dirs = (keyword->type == T_INCLUDE_NEXT);
4044 static int import_warning = 0;
4045 char *fname; /* Dynamically allocated fname buffer */
4048 U_CHAR *fbeg, *fend; /* Beginning and end of fname */
4050 struct file_name_list *search_start = include; /* Chain of dirs to search */
4051 struct file_name_list dsp[1]; /* First in chain, if #include "..." */
4052 struct file_name_list *searchptr = 0;
4055 int f; /* file number */
4057 int retried = 0; /* Have already tried macro
4058 expanding the include line*/
4059 FILE_BUF trybuf; /* It got expanded into here */
4060 int angle_brackets = 0; /* 0 for "...", 1 for <...> */
4065 f= -1; /* JF we iz paranoid! */
4067 if (importing && warn_import && !inhibit_warnings
4068 && !instack[indepth].system_header_p && !import_warning) {
4070 warning ("using `#import' is not recommended");
4071 fprintf (stderr, "The fact that a certain header file need not be processed more than once\n");
4072 fprintf (stderr, "should be indicated in the header file, not where it is used.\n");
4073 fprintf (stderr, "The best way to do this is with a conditional of this form:\n\n");
4074 fprintf (stderr, " #ifndef _FOO_H_INCLUDED\n");
4075 fprintf (stderr, " #define _FOO_H_INCLUDED\n");
4076 fprintf (stderr, " ... <real contents of file> ...\n");
4077 fprintf (stderr, " #endif /* Not _FOO_H_INCLUDED */\n\n");
4078 fprintf (stderr, "Then users can use `#include' any number of times.\n");
4079 fprintf (stderr, "GNU C automatically avoids processing the file more than once\n");
4080 fprintf (stderr, "when it is equipped with such a conditional.\n");
4086 SKIP_WHITE_SPACE (fbeg);
4087 /* Discard trailing whitespace so we can easily see
4088 if we have parsed all the significant chars we were given. */
4089 while (limit != fbeg && is_hor_space[limit[-1]]) limit--;
4095 /* Copy the operand text, concatenating the strings. */
4098 fbeg = (U_CHAR *) alloca (limit - fbeg + 1);
4100 while (fin != limit) {
4101 while (fin != limit && *fin != '\"')
4106 /* If not at the end, there had better be another string. */
4107 /* Skip just horiz space, and don't go past limit. */
4108 while (fin != limit && is_hor_space[*fin]) fin++;
4109 if (fin != limit && *fin == '\"')
4117 /* We have "filename". Figure out directory this source
4118 file is coming from and put it on the front of the list. */
4120 /* If -I- was specified, don't search current dir, only spec'd ones. */
4121 if (ignore_srcdir) break;
4123 for (fp = &instack[indepth]; fp >= instack; fp--)
4128 if ((nam = fp->nominal_fname) != NULL) {
4129 /* Found a named file. Figure out dir of the file,
4130 and put it in front of the search list. */
4131 dsp[0].next = search_start;
4134 ep = rindex (nam, '/');
4136 ep = rindex (nam, ']');
4137 if (ep == NULL) ep = rindex (nam, '>');
4138 if (ep == NULL) ep = rindex (nam, ':');
4139 if (ep != NULL) ep++;
4143 dsp[0].fname = (char *) alloca (n + 1);
4144 strncpy (dsp[0].fname, nam, n);
4145 dsp[0].fname[n] = '\0';
4146 if (n + INCLUDE_LEN_FUDGE > max_include_len)
4147 max_include_len = n + INCLUDE_LEN_FUDGE;
4149 dsp[0].fname = 0; /* Current directory */
4151 dsp[0].got_name_map = 0;
4160 while (fend != limit && *fend != '>') fend++;
4161 if (*fend == '>' && fend + 1 == limit) {
4163 /* If -I-, start with the first -I dir after the -I-. */
4164 if (first_bracket_include)
4165 search_start = first_bracket_include;
4173 * Support '#include xyz' like VAX-C to allow for easy use of all the
4174 * decwindow include files. It defaults to '#include <xyz.h>' (so the
4175 * code from case '<' is repeated here) and generates a warning.
4177 if (isalpha(*(--fbeg))) {
4179 while (fend != limit && (!isspace(*fend))) fend++;
4180 warning ("VAX-C-style include specification found, use '#include <filename.h>' !");
4181 if (fend == limit) {
4183 /* If -I-, start with the first -I dir after the -I-. */
4184 if (first_bracket_include)
4185 search_start = first_bracket_include;
4193 error ("`#%s' expects \"FILENAME\" or <FILENAME>", keyword->name);
4196 trybuf = expand_to_temp_buffer (buf, limit, 0, 0);
4197 buf = (U_CHAR *) alloca (trybuf.bufp - trybuf.buf + 1);
4198 bcopy ((char *) trybuf.buf, (char *) buf, trybuf.bufp - trybuf.buf);
4199 limit = buf + (trybuf.bufp - trybuf.buf);
4206 /* For #include_next, skip in the search path
4207 past the dir in which the containing file was found. */
4210 for (fp = &instack[indepth]; fp >= instack; fp--)
4211 if (fp->fname != NULL) {
4212 /* fp->dir is null if the containing file was specified
4213 with an absolute file name. In that case, don't skip anything. */
4215 search_start = fp->dir->next;
4224 error ("empty file name in `#%s'", keyword->name);
4228 /* Allocate this permanently, because it gets stored in the definitions
4230 fname = (char *) xmalloc (max_include_len + flen + 4);
4231 /* + 2 above for slash and terminating null. */
4232 /* + 2 added for '.h' on VMS (to support '#include filename') */
4234 /* If specified file name is absolute, just open it. */
4237 strncpy (fname, fbeg, flen);
4239 if (redundant_include_p (fname))
4242 f = lookup_import (fname, NULL_PTR);
4244 f = open_include_file (fname, NULL_PTR);
4246 return 0; /* Already included this file */
4248 /* Search directory path, trying to open the file.
4249 Copy each filename tried into FNAME. */
4251 for (searchptr = search_start; searchptr; searchptr = searchptr->next) {
4252 if (searchptr->fname) {
4253 /* The empty string in a search path is ignored.
4254 This makes it possible to turn off entirely
4255 a standard piece of the list. */
4256 if (searchptr->fname[0] == 0)
4258 strcpy (fname, searchptr->fname);
4259 strcat (fname, "/");
4260 fname[strlen (fname) + flen] = 0;
4264 strncat (fname, fbeg, flen);
4266 /* Change this 1/2 Unix 1/2 VMS file specification into a
4267 full VMS file specification */
4268 if (searchptr->fname && (searchptr->fname[0] != 0)) {
4269 /* Fix up the filename */
4270 hack_vms_include_specification (fname);
4272 /* This is a normal VMS filespec, so use it unchanged. */
4273 strncpy (fname, fbeg, flen);
4275 /* if it's '#include filename', add the missing .h */
4276 if (index(fname,'.')==NULL) {
4277 strcat (fname, ".h");
4282 f = lookup_import (fname, searchptr);
4284 f = open_include_file (fname, searchptr);
4286 return 0; /* Already included this file */
4288 else if (f == -1 && errno == EACCES)
4289 warning ("Header file %s exists, but is not readable", fname);
4291 if (redundant_include_p (fname)) {
4301 /* A file that was not found. */
4303 strncpy (fname, fbeg, flen);
4305 /* If generating dependencies and -MG was specified, we assume missing
4306 files are leaf files, living in the same directory as the source file
4307 or other similar place; these missing files may be generated from
4308 other files and may not exist yet (eg: y.tab.h). */
4309 if (print_deps_missing_files
4310 && print_deps > (angle_brackets || (system_include_depth > 0)))
4312 /* If it was requested as a system header file,
4313 then assume it belongs in the first place to look for such. */
4316 for (searchptr = search_start; searchptr; searchptr = searchptr->next)
4318 if (searchptr->fname)
4322 if (searchptr->fname[0] == 0)
4324 p = xmalloc (strlen (searchptr->fname)
4325 + strlen (fname) + 2);
4326 strcpy (p, searchptr->fname);
4329 deps_output (p, ' ');
4336 /* Otherwise, omit the directory, as if the file existed
4337 in the directory with the source. */
4338 deps_output (fname, ' ');
4341 /* If -M was specified, and this header file won't be added to the
4342 dependency list, then don't count this as an error, because we can
4343 still produce correct output. Otherwise, we can't produce correct
4344 output, because there may be dependencies we need inside the missing
4345 file, and we don't know what directory this missing file exists in. */
4347 && (print_deps <= (angle_brackets || (system_include_depth > 0))))
4348 warning ("No include path in which to find %s", fname);
4349 else if (search_start)
4350 error_from_errno (fname);
4352 error ("No include path in which to find %s", fname);
4356 /* Check to see if this include file is a once-only include file.
4359 struct file_name_list* ptr;
4361 for (ptr = dont_repeat_files; ptr; ptr = ptr->next) {
4362 if (!strcmp (ptr->fname, fname)) {
4364 return 0; /* This file was once'd. */
4368 for (ptr = all_include_files; ptr; ptr = ptr->next) {
4369 if (!strcmp (ptr->fname, fname))
4370 break; /* This file was included before. */
4374 /* This is the first time for this file. */
4375 /* Add it to list of files included. */
4377 ptr = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
4378 ptr->control_macro = 0;
4379 ptr->c_system_include_path = 0;
4380 ptr->next = all_include_files;
4381 all_include_files = ptr;
4382 ptr->fname = savestring (fname);
4383 ptr->got_name_map = 0;
4385 /* For -M, add this file to the dependencies. */
4386 if (print_deps > (angle_brackets || (system_include_depth > 0)))
4387 deps_output (fname, ' ');
4390 /* Handle -H option. */
4391 if (print_include_names) {
4392 output_dots (stderr, indepth);
4393 fprintf (stderr, "%s\n", fname);
4397 system_include_depth++;
4399 /* Actually process the file. */
4400 add_import (f, fname); /* Record file on "seen" list for #import. */
4402 pcftry = (char *) alloca (strlen (fname) + 30);
4410 sprintf (pcftry, "%s%d", fname, pcfnum++);
4412 pcf = open (pcftry, O_RDONLY, 0666);
4418 if (bcmp ((char *) &stat_f.st_ino, (char *) &s.st_ino,
4420 || stat_f.st_dev != s.st_dev)
4422 pcfbuf = check_precompiled (pcf, fname, &pcfbuflimit);
4423 /* Don't need it any more. */
4428 /* Don't need it at all. */
4433 } while (pcf != -1 && !pcfbuf);
4435 /* Actually process the file */
4437 pcfname = xmalloc (strlen (pcftry) + 1);
4438 strcpy (pcfname, pcftry);
4439 pcfinclude (pcfbuf, pcfbuflimit, fname, op);
4442 finclude (f, fname, op, is_system_include (fname), searchptr);
4445 system_include_depth--;
4450 /* Return nonzero if there is no need to include file NAME
4451 because it has already been included and it contains a conditional
4452 to make a repeated include do nothing. */
4455 redundant_include_p (name)
4458 struct file_name_list *l = all_include_files;
4459 for (; l; l = l->next)
4460 if (! strcmp (name, l->fname)
4462 && lookup (l->control_macro, -1, -1))
4467 /* Return nonzero if the given FILENAME is an absolute pathname which
4468 designates a file within one of the known "system" include file
4469 directories. We assume here that if the given FILENAME looks like
4470 it is the name of a file which resides either directly in a "system"
4471 include file directory, or within any subdirectory thereof, then the
4472 given file must be a "system" include file. This function tells us
4473 if we should suppress pedantic errors/warnings for the given FILENAME.
4475 The value is 2 if the file is a C-language system header file
4476 for which C++ should (on most systems) assume `extern "C"'. */
4479 is_system_include (filename)
4480 register char *filename;
4482 struct file_name_list *searchptr;
4484 for (searchptr = first_system_include; searchptr;
4485 searchptr = searchptr->next)
4486 if (searchptr->fname) {
4487 register char *sys_dir = searchptr->fname;
4488 register unsigned length = strlen (sys_dir);
4490 if (! strncmp (sys_dir, filename, length) && filename[length] == '/')
4492 if (searchptr->c_system_include_path)
4501 /* The file_name_map structure holds a mapping of file names for a
4502 particular directory. This mapping is read from the file named
4503 FILE_NAME_MAP_FILE in that directory. Such a file can be used to
4504 map filenames on a file system with severe filename restrictions,
4505 such as DOS. The format of the file name map file is just a series
4506 of lines with two tokens on each line. The first token is the name
4507 to map, and the second token is the actual name to use. */
4509 struct file_name_map
4511 struct file_name_map *map_next;
4516 #define FILE_NAME_MAP_FILE "header.gcc"
4518 /* Read a space delimited string of unlimited length from a stdio
4522 read_filename_string (ch, f)
4530 set = alloc = xmalloc (len + 1);
4534 while ((ch = getc (f)) != EOF && ! is_space[ch])
4536 if (set - alloc == len)
4539 alloc = xrealloc (alloc, len + 1);
4540 set = alloc + len / 2;
4550 /* Read the file name map file for DIRNAME. */
4552 static struct file_name_map *
4553 read_name_map (dirname)
4556 /* This structure holds a linked list of file name maps, one per
4558 struct file_name_map_list
4560 struct file_name_map_list *map_list_next;
4561 char *map_list_name;
4562 struct file_name_map *map_list_map;
4564 static struct file_name_map_list *map_list;
4565 register struct file_name_map_list *map_list_ptr;
4569 for (map_list_ptr = map_list; map_list_ptr;
4570 map_list_ptr = map_list_ptr->map_list_next)
4571 if (! strcmp (map_list_ptr->map_list_name, dirname))
4572 return map_list_ptr->map_list_map;
4574 map_list_ptr = ((struct file_name_map_list *)
4575 xmalloc (sizeof (struct file_name_map_list)));
4576 map_list_ptr->map_list_name = savestring (dirname);
4577 map_list_ptr->map_list_map = NULL;
4579 name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2);
4580 strcpy (name, dirname);
4583 strcat (name, FILE_NAME_MAP_FILE);
4584 f = fopen (name, "r");
4586 map_list_ptr->map_list_map = NULL;
4590 int dirlen = strlen (dirname);
4592 while ((ch = getc (f)) != EOF)
4595 struct file_name_map *ptr;
4599 from = read_filename_string (ch, f);
4600 while ((ch = getc (f)) != EOF && is_hor_space[ch])
4602 to = read_filename_string (ch, f);
4604 ptr = ((struct file_name_map *)
4605 xmalloc (sizeof (struct file_name_map)));
4606 ptr->map_from = from;
4608 /* Make the real filename absolute. */
4613 ptr->map_to = xmalloc (dirlen + strlen (to) + 2);
4614 strcpy (ptr->map_to, dirname);
4615 ptr->map_to[dirlen] = '/';
4616 strcpy (ptr->map_to + dirlen + 1, to);
4620 ptr->map_next = map_list_ptr->map_list_map;
4621 map_list_ptr->map_list_map = ptr;
4623 while ((ch = getc (f)) != '\n')
4630 map_list_ptr->map_list_next = map_list;
4631 map_list = map_list_ptr;
4633 return map_list_ptr->map_list_map;
4636 /* Try to open include file FILENAME. SEARCHPTR is the directory
4637 being tried from the include file search path. This function maps
4638 filenames on file systems based on information read by
4642 open_include_file (filename, searchptr)
4644 struct file_name_list *searchptr;
4646 register struct file_name_map *map;
4647 register char *from;
4650 if (searchptr && ! searchptr->got_name_map)
4652 searchptr->name_map = read_name_map (searchptr->fname
4653 ? searchptr->fname : ".");
4654 searchptr->got_name_map = 1;
4657 /* First check the mapping for the directory we are using. */
4658 if (searchptr && searchptr->name_map)
4661 if (searchptr->fname)
4662 from += strlen (searchptr->fname) + 1;
4663 for (map = searchptr->name_map; map; map = map->map_next)
4665 if (! strcmp (map->map_from, from))
4667 /* Found a match. */
4668 return open (map->map_to, O_RDONLY, 0666);
4673 /* Try to find a mapping file for the particular directory we are
4674 looking in. Thus #include <sys/types.h> will look up sys/types.h
4675 in /usr/include/header.gcc and look up types.h in
4676 /usr/include/sys/header.gcc. */
4677 p = rindex (filename, '/');
4682 && strlen (searchptr->fname) == p - filename
4683 && ! strncmp (searchptr->fname, filename, p - filename))
4685 /* FILENAME is in SEARCHPTR, which we've already checked. */
4686 return open (filename, O_RDONLY, 0666);
4696 dir = (char *) alloca (p - filename + 1);
4697 bcopy (filename, dir, p - filename);
4698 dir[p - filename] = '\0';
4701 for (map = read_name_map (dir); map; map = map->map_next)
4702 if (! strcmp (map->map_from, from))
4703 return open (map->map_to, O_RDONLY, 0666);
4705 return open (filename, O_RDONLY, 0666);
4708 /* Process the contents of include file FNAME, already open on descriptor F,
4710 SYSTEM_HEADER_P is 1 if this file resides in any one of the known
4711 "system" include directories (as decided by the `is_system_include'
4713 DIRPTR is the link in the dir path through which this file was found,
4714 or 0 if the file name was absolute. */
4717 finclude (f, fname, op, system_header_p, dirptr)
4721 int system_header_p;
4722 struct file_name_list *dirptr;
4727 FILE_BUF *fp; /* For input stack frame */
4728 int missing_newline = 0;
4730 CHECK_DEPTH (return;);
4732 if (file_size_and_mode (f, &st_mode, &st_size) < 0)
4734 perror_with_name (fname);
4739 fp = &instack[indepth + 1];
4740 bzero ((char *) fp, sizeof (FILE_BUF));
4741 fp->nominal_fname = fp->fname = fname;
4744 fp->if_stack = if_stack;
4745 fp->system_header_p = system_header_p;
4748 if (S_ISREG (st_mode)) {
4749 fp->buf = (U_CHAR *) xmalloc (st_size + 2);
4752 /* Read the file contents, knowing that st_size is an upper bound
4753 on the number of bytes we can read. */
4754 fp->length = safe_read (f, fp->buf, st_size);
4755 if (fp->length < 0) goto nope;
4757 else if (S_ISDIR (st_mode)) {
4758 error ("directory `%s' specified in #include", fname);
4762 /* Cannot count its file size before reading.
4763 First read the entire file into heap and
4764 copy them into buffer on stack. */
4769 fp->buf = (U_CHAR *) xmalloc (bsize + 2);
4772 i = safe_read (f, fp->buf + st_size, bsize - st_size);
4774 goto nope; /* error! */
4776 if (st_size != bsize)
4777 break; /* End of file */
4779 fp->buf = (U_CHAR *) xrealloc (fp->buf, bsize + 2);
4782 fp->length = st_size;
4785 if ((fp->length > 0 && fp->buf[fp->length - 1] != '\n')
4786 /* Backslash-newline at end is not good enough. */
4787 || (fp->length > 1 && fp->buf[fp->length - 2] == '\\')) {
4788 fp->buf[fp->length++] = '\n';
4789 missing_newline = 1;
4791 fp->buf[fp->length] = '\0';
4793 /* Close descriptor now, so nesting does not use lots of descriptors. */
4796 /* Must do this before calling trigraph_pcp, so that the correct file name
4797 will be printed in warning messages. */
4800 input_file_stack_tick++;
4805 output_line_command (fp, op, 0, enter_file);
4808 if (missing_newline)
4811 if (pedantic && missing_newline)
4812 pedwarn ("file does not end in newline");
4815 input_file_stack_tick++;
4816 output_line_command (&instack[indepth], op, 0, leave_file);
4822 perror_with_name (fname);
4827 /* Record that inclusion of the file named FILE
4828 should be controlled by the macro named MACRO_NAME.
4829 This means that trying to include the file again
4830 will do something if that macro is defined. */
4833 record_control_macro (file, macro_name)
4837 struct file_name_list *new;
4839 for (new = all_include_files; new; new = new->next) {
4840 if (!strcmp (new->fname, file)) {
4841 new->control_macro = macro_name;
4846 /* If the file is not in all_include_files, something's wrong. */
4850 /* Maintain and search list of included files, for #import. */
4852 #define IMPORT_HASH_SIZE 31
4854 struct import_file {
4858 struct import_file *next;
4861 /* Hash table of files already included with #include or #import. */
4863 static struct import_file *import_hash_table[IMPORT_HASH_SIZE];
4865 /* Hash a file name for import_hash_table. */
4873 while (*f) val += *f++;
4874 return (val%IMPORT_HASH_SIZE);
4877 /* Search for file FILENAME in import_hash_table.
4878 Return -2 if found, either a matching name or a matching inode.
4879 Otherwise, open the file and return a file descriptor if successful
4880 or -1 if unsuccessful. */
4883 lookup_import (filename, searchptr)
4885 struct file_name_list *searchptr;
4887 struct import_file *i;
4893 hashval = import_hash (filename);
4895 /* Attempt to find file in list of already included files */
4896 i = import_hash_table[hashval];
4899 if (!strcmp (filename, i->name))
4900 return -2; /* return found */
4903 /* Open it and try a match on inode/dev */
4904 fd = open_include_file (filename, searchptr);
4908 for (h = 0; h < IMPORT_HASH_SIZE; h++) {
4909 i = import_hash_table[h];
4911 /* Compare the inode and the device.
4912 Supposedly on some systems the inode is not a scalar. */
4913 if (!bcmp ((char *) &i->inode, (char *) &sb.st_ino, sizeof (sb.st_ino))
4914 && i->dev == sb.st_dev) {
4916 return -2; /* return found */
4921 return fd; /* Not found, return open file */
4924 /* Add the file FNAME, open on descriptor FD, to import_hash_table. */
4927 add_import (fd, fname)
4931 struct import_file *i;
4935 hashval = import_hash (fname);
4937 i = (struct import_file *)xmalloc (sizeof (struct import_file));
4938 i->name = (char *)xmalloc (strlen (fname)+1);
4939 strcpy (i->name, fname);
4940 bcopy ((char *) &sb.st_ino, (char *) &i->inode, sizeof (sb.st_ino));
4942 i->next = import_hash_table[hashval];
4943 import_hash_table[hashval] = i;
4946 /* Load the specified precompiled header into core, and verify its
4947 preconditions. PCF indicates the file descriptor to read, which must
4948 be a regular file. FNAME indicates the file name of the original
4949 header. *LIMIT will be set to an address one past the end of the file.
4950 If the preconditions of the file are not satisfied, the buffer is
4951 freed and we return 0. If the preconditions are satisfied, return
4952 the address of the buffer following the preconditions. The buffer, in
4953 this case, should never be freed because various pieces of it will
4954 be referred to until all precompiled strings are output at the end of
4958 check_precompiled (pcf, fname, limit)
4972 if (file_size_and_mode (pcf, &st_mode, &st_size) < 0)
4975 if (S_ISREG (st_mode))
4977 buf = xmalloc (st_size + 2);
4978 length = safe_read (pcf, buf, st_size);
4985 if (length > 0 && buf[length-1] != '\n')
4986 buf[length++] = '\n';
4989 *limit = buf + length;
4991 /* File is in core. Check the preconditions. */
4992 if (!check_preconditions (buf))
4994 for (cp = buf; *cp; cp++)
4997 fprintf (stderr, "Using preinclude %s\n", fname);
5003 fprintf (stderr, "Cannot use preinclude %s\n", fname);
5009 /* PREC (null terminated) points to the preconditions of a
5010 precompiled header. These are a series of #define and #undef
5011 lines which must match the current contents of the hash
5014 check_preconditions (prec)
5021 lineend = (char *) index (prec, '\n');
5023 if (*prec++ != '#') {
5024 error ("Bad format encountered while reading precompiled file");
5027 if (!strncmp (prec, "define", 6)) {
5031 mdef = create_definition (prec, lineend, NULL_PTR);
5036 if ((hp = lookup (mdef.symnam, mdef.symlen, -1)) == NULL
5037 || (hp->type != T_MACRO && hp->type != T_CONST)
5038 || (hp->type == T_MACRO
5039 && !compare_defs (mdef.defn, hp->value.defn)
5040 && (mdef.defn->length != 2
5041 || mdef.defn->expansion[0] != '\n'
5042 || mdef.defn->expansion[1] != ' ')))
5044 } else if (!strncmp (prec, "undef", 5)) {
5049 while (is_hor_space[(U_CHAR) *prec])
5052 while (is_idchar[(U_CHAR) *prec])
5056 if (lookup (name, len, -1))
5059 error ("Bad format encountered while reading precompiled file");
5064 /* They all passed successfully */
5068 /* Process the main body of a precompiled file. BUF points to the
5069 string section of the file, following the preconditions. LIMIT is one
5070 character past the end. NAME is the name of the file being read
5071 in. OP is the main output buffer */
5073 pcfinclude (buf, limit, name, op)
5074 U_CHAR *buf, *limit, *name;
5081 /* First in the file comes 4 bytes indicating the number of strings, */
5082 /* in network byte order. (MSB first). */
5084 nstrings = (nstrings << 8) | *cp++;
5085 nstrings = (nstrings << 8) | *cp++;
5086 nstrings = (nstrings << 8) | *cp++;
5088 /* Looping over each string... */
5089 while (nstrings--) {
5090 U_CHAR *string_start;
5091 U_CHAR *endofthiskey;
5095 /* Each string starts with a STRINGDEF structure (str), followed */
5096 /* by the text of the string (string_start) */
5098 /* First skip to a longword boundary */
5099 /* ??? Why a 4-byte boundary? On all machines? */
5100 /* NOTE: This works correctly even if HOST_WIDE_INT
5101 is narrower than a pointer.
5102 Do not try risky measures here to get another type to use!
5103 Do not include stddef.h--it will fail! */
5104 if ((HOST_WIDE_INT) cp & 3)
5105 cp += 4 - ((HOST_WIDE_INT) cp & 3);
5107 /* Now get the string. */
5108 str = (STRINGDEF *) cp;
5109 string_start = cp += sizeof (STRINGDEF);
5111 for (; *cp; cp++) /* skip the string */
5114 /* We need to macro expand the string here to ensure that the
5115 proper definition environment is in place. If it were only
5116 expanded when we find out it is needed, macros necessary for
5117 its proper expansion might have had their definitions changed. */
5118 tmpbuf = expand_to_temp_buffer (string_start, cp++, 0, 0);
5119 /* Lineno is already set in the precompiled file */
5120 str->contents = tmpbuf.buf;
5121 str->len = tmpbuf.length;
5123 str->filename = name;
5124 str->output_mark = outbuf.bufp - outbuf.buf;
5127 *stringlist_tailp = str;
5128 stringlist_tailp = &str->chain;
5130 /* Next comes a fourbyte number indicating the number of keys */
5131 /* for this string. */
5133 nkeys = (nkeys << 8) | *cp++;
5134 nkeys = (nkeys << 8) | *cp++;
5135 nkeys = (nkeys << 8) | *cp++;
5137 /* If this number is -1, then the string is mandatory. */
5141 /* Otherwise, for each key, */
5142 for (; nkeys--; free (tmpbuf.buf), cp = endofthiskey + 1) {
5143 KEYDEF *kp = (KEYDEF *) cp;
5146 /* It starts with a KEYDEF structure */
5147 cp += sizeof (KEYDEF);
5149 /* Find the end of the key. At the end of this for loop we
5150 advance CP to the start of the next key using this variable. */
5151 endofthiskey = cp + strlen (cp);
5154 /* Expand the key, and enter it into the hash table. */
5155 tmpbuf = expand_to_temp_buffer (cp, endofthiskey, 0, 0);
5156 tmpbuf.bufp = tmpbuf.buf;
5158 while (is_hor_space[*tmpbuf.bufp])
5160 if (!is_idstart[*tmpbuf.bufp]
5161 || tmpbuf.bufp == tmpbuf.buf + tmpbuf.length) {
5166 hp = lookup (tmpbuf.bufp, -1, -1);
5169 install (tmpbuf.bufp, -1, T_PCSTRING, 0, (char *) kp, -1);
5171 else if (hp->type == T_PCSTRING) {
5172 kp->chain = hp->value.keydef;
5173 hp->value.keydef = kp;
5179 /* This output_line_command serves to switch us back to the current
5180 input file in case some of these strings get output (which will
5181 result in line commands for the header file being output). */
5182 output_line_command (&instack[indepth], op, 0, enter_file);
5185 /* Called from rescan when it hits a key for strings. Mark them all */
5186 /* used and clean up. */
5193 for (kp = hp->value.keydef; kp; kp = kp->chain)
5194 kp->str->writeflag = 1;
5198 /* Write the output, interspersing precompiled strings in their */
5199 /* appropriate places. */
5203 STRINGDEF *next_string;
5204 U_CHAR *cur_buf_loc;
5205 int line_command_len = 80;
5206 char *line_command = xmalloc (line_command_len);
5209 /* In each run through the loop, either cur_buf_loc == */
5210 /* next_string_loc, in which case we print a series of strings, or */
5211 /* it is less than next_string_loc, in which case we write some of */
5213 cur_buf_loc = outbuf.buf;
5214 next_string = stringlist;
5216 while (cur_buf_loc < outbuf.bufp || next_string) {
5218 && cur_buf_loc - outbuf.buf == next_string->output_mark) {
5219 if (next_string->writeflag) {
5220 len = 4 * strlen (next_string->filename) + 32;
5221 while (len > line_command_len)
5222 line_command = xrealloc (line_command,
5223 line_command_len *= 2);
5224 sprintf (line_command, "\n# %d ", next_string->lineno);
5225 strcpy (quote_string (line_command + strlen (line_command),
5226 next_string->filename),
5228 safe_write (fileno (stdout), line_command, strlen (line_command));
5229 safe_write (fileno (stdout), next_string->contents, next_string->len);
5231 next_string = next_string->chain;
5235 ? (next_string->output_mark
5236 - (cur_buf_loc - outbuf.buf))
5237 : outbuf.bufp - cur_buf_loc);
5239 safe_write (fileno (stdout), cur_buf_loc, len);
5243 free (line_command);
5246 /* Pass a directive through to the output file.
5247 BUF points to the contents of the directive, as a contiguous string.
5248 LIMIT points to the first character past the end of the directive.
5249 KEYWORD is the keyword-table entry for the directive. */
5252 pass_thru_directive (buf, limit, op, keyword)
5253 U_CHAR *buf, *limit;
5255 struct directive *keyword;
5257 register unsigned keyword_length = keyword->length;
5259 check_expand (op, 1 + keyword_length + (limit - buf));
5261 bcopy (keyword->name, (char *) op->bufp, keyword_length);
5262 op->bufp += keyword_length;
5263 if (limit != buf && buf[0] != ' ')
5265 bcopy ((char *) buf, (char *) op->bufp, limit - buf);
5266 op->bufp += (limit - buf);
5269 /* Count the line we have just made in the output,
5270 to get in sync properly. */
5275 /* The arglist structure is built by do_define to tell
5276 collect_definition where the argument names begin. That
5277 is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist
5278 would contain pointers to the strings x, y, and z.
5279 Collect_definition would then build a DEFINITION node,
5280 with reflist nodes pointing to the places x, y, and z had
5281 appeared. So the arglist is just convenience data passed
5282 between these two routines. It is not kept around after
5283 the current #define has been processed and entered into the
5287 struct arglist *next;
5294 /* Create a DEFINITION node from a #define directive. Arguments are
5295 as for do_define. */
5297 create_definition (buf, limit, op)
5298 U_CHAR *buf, *limit;
5301 U_CHAR *bp; /* temp ptr into input buffer */
5302 U_CHAR *symname; /* remember where symbol name starts */
5303 int sym_length; /* and how long it is */
5304 int line = instack[indepth].lineno;
5305 char *file = instack[indepth].nominal_fname;
5309 int arglengths = 0; /* Accumulate lengths of arg names
5310 plus number of args. */
5315 while (is_hor_space[*bp])
5318 symname = bp; /* remember where it starts */
5319 sym_length = check_macro_name (bp, "macro");
5322 /* Lossage will occur if identifiers or control keywords are broken
5323 across lines using backslash. This is not the right place to take
5327 struct arglist *arg_ptrs = NULL;
5330 bp++; /* skip '(' */
5331 SKIP_WHITE_SPACE (bp);
5333 /* Loop over macro argument names. */
5334 while (*bp != ')') {
5335 struct arglist *temp;
5337 temp = (struct arglist *) alloca (sizeof (struct arglist));
5339 temp->next = arg_ptrs;
5340 temp->argno = argno++;
5341 temp->rest_args = 0;
5345 pedwarn ("another parameter follows `%s'",
5348 if (!is_idstart[*bp])
5349 pedwarn ("invalid character in macro parameter name");
5351 /* Find the end of the arg name. */
5352 while (is_idchar[*bp]) {
5354 /* do we have a "special" rest-args extension here? */
5355 if (limit - bp > REST_EXTENSION_LENGTH &&
5356 strncmp (rest_extension, bp, REST_EXTENSION_LENGTH) == 0) {
5358 temp->rest_args = 1;
5362 temp->length = bp - temp->name;
5364 bp += REST_EXTENSION_LENGTH;
5365 arglengths += temp->length + 2;
5366 SKIP_WHITE_SPACE (bp);
5367 if (temp->length == 0 || (*bp != ',' && *bp != ')')) {
5368 error ("badly punctuated parameter list in `#define'");
5373 SKIP_WHITE_SPACE (bp);
5376 error ("unterminated parameter list in `#define'");
5380 struct arglist *otemp;
5382 for (otemp = temp->next; otemp != NULL; otemp = otemp->next)
5383 if (temp->length == otemp->length &&
5384 strncmp (temp->name, otemp->name, temp->length) == 0) {
5387 name = (U_CHAR *) alloca (temp->length + 1);
5388 (void) strncpy (name, temp->name, temp->length);
5389 name[temp->length] = '\0';
5390 error ("duplicate argument name `%s' in `#define'", name);
5396 ++bp; /* skip paren */
5397 /* Skip spaces and tabs if any. */
5398 while (bp < limit && (*bp == ' ' || *bp == '\t'))
5400 /* now everything from bp before limit is the definition. */
5401 defn = collect_expansion (bp, limit, argno, arg_ptrs);
5402 defn->rest_args = rest_args;
5404 /* Now set defn->args.argnames to the result of concatenating
5405 the argument names in reverse order
5406 with comma-space between them. */
5407 defn->args.argnames = (U_CHAR *) xmalloc (arglengths + 1);
5409 struct arglist *temp;
5411 for (temp = arg_ptrs; temp; temp = temp->next) {
5412 bcopy (temp->name, &defn->args.argnames[i], temp->length);
5414 if (temp->next != 0) {
5415 defn->args.argnames[i++] = ',';
5416 defn->args.argnames[i++] = ' ';
5419 defn->args.argnames[i] = 0;
5422 /* Simple expansion or empty definition. */
5428 case '\t': case ' ':
5429 /* Skip spaces and tabs. */
5430 while (++bp < limit && (*bp == ' ' || *bp == '\t'))
5434 case '!': case '"': case '#': case '%': case '&': case '\'':
5435 case ')': case '*': case '+': case ',': case '-': case '.':
5436 case '/': case ':': case ';': case '<': case '=': case '>':
5437 case '?': case '[': case '\\': case ']': case '^': case '{':
5438 case '|': case '}': case '~':
5439 warning ("missing white space after `#define %.*s'",
5440 sym_length, symname);
5444 pedwarn ("missing white space after `#define %.*s'",
5445 sym_length, symname);
5449 /* Now everything from bp before limit is the definition. */
5450 defn = collect_expansion (bp, limit, -1, NULL_PTR);
5451 defn->args.argnames = (U_CHAR *) "";
5457 /* OP is null if this is a predefinition */
5458 defn->predefined = !op;
5460 mdef.symnam = symname;
5461 mdef.symlen = sym_length;
5470 /* Process a #define command.
5471 BUF points to the contents of the #define command, as a contiguous string.
5472 LIMIT points to the first character past the end of the definition.
5473 KEYWORD is the keyword-table entry for #define. */
5476 do_define (buf, limit, op, keyword)
5477 U_CHAR *buf, *limit;
5479 struct directive *keyword;
5484 /* If this is a precompiler run (with -pcp) pass thru #define commands. */
5485 if (pcp_outfile && op)
5486 pass_thru_directive (buf, limit, op, keyword);
5488 mdef = create_definition (buf, limit, op);
5492 hashcode = hashf (mdef.symnam, mdef.symlen, HASHSIZE);
5496 if ((hp = lookup (mdef.symnam, mdef.symlen, hashcode)) != NULL) {
5498 /* Redefining a precompiled key is ok. */
5499 if (hp->type == T_PCSTRING)
5501 /* Redefining a macro is ok if the definitions are the same. */
5502 else if (hp->type == T_MACRO)
5503 ok = ! compare_defs (mdef.defn, hp->value.defn);
5504 /* Redefining a constant is ok with -D. */
5505 else if (hp->type == T_CONST)
5506 ok = ! done_initializing;
5507 /* Print the warning if it's not ok. */
5509 U_CHAR *msg; /* what pain... */
5511 /* If we are passing through #define and #undef directives, do
5512 that for this re-definition now. */
5513 if (debug_output && op)
5514 pass_thru_directive (buf, limit, op, keyword);
5516 msg = (U_CHAR *) alloca (mdef.symlen + 22);
5518 bcopy ((char *) mdef.symnam, (char *) (msg + 1), mdef.symlen);
5519 strcpy ((char *) (msg + mdef.symlen + 1), "' redefined");
5521 if (hp->type == T_MACRO)
5522 pedwarn_with_file_and_line (hp->value.defn->file, hp->value.defn->line,
5523 "this is the location of the previous definition");
5525 /* Replace the old definition. */
5527 hp->value.defn = mdef.defn;
5529 /* If we are passing through #define and #undef directives, do
5530 that for this new definition now. */
5531 if (debug_output && op)
5532 pass_thru_directive (buf, limit, op, keyword);
5533 install (mdef.symnam, mdef.symlen, T_MACRO, 0,
5534 (char *) mdef.defn, hashcode);
5545 /* Check a purported macro name SYMNAME, and yield its length.
5546 USAGE is the kind of name this is intended for. */
5549 check_macro_name (symname, usage)
5556 for (p = symname; is_idchar[*p]; p++)
5558 sym_length = p - symname;
5559 if (sym_length == 0)
5560 error ("invalid %s name", usage);
5561 else if (!is_idstart[*symname]) {
5562 U_CHAR *msg; /* what pain... */
5563 msg = (U_CHAR *) alloca (sym_length + 1);
5564 bcopy ((char *) symname, (char *) msg, sym_length);
5565 msg[sym_length] = 0;
5566 error ("invalid %s name `%s'", usage, msg);
5568 if (! strncmp (symname, "defined", 7) && sym_length == 7)
5569 error ("invalid %s name `defined'", usage);
5575 * return zero if two DEFINITIONs are isomorphic
5578 compare_defs (d1, d2)
5579 DEFINITION *d1, *d2;
5581 register struct reflist *a1, *a2;
5582 register U_CHAR *p1 = d1->expansion;
5583 register U_CHAR *p2 = d2->expansion;
5586 if (d1->nargs != d2->nargs)
5588 if (strcmp ((char *)d1->args.argnames, (char *)d2->args.argnames))
5590 for (a1 = d1->pattern, a2 = d2->pattern; a1 && a2;
5591 a1 = a1->next, a2 = a2->next) {
5592 if (!((a1->nchars == a2->nchars && ! strncmp (p1, p2, a1->nchars))
5593 || ! comp_def_part (first, p1, a1->nchars, p2, a2->nchars, 0))
5594 || a1->argno != a2->argno
5595 || a1->stringify != a2->stringify
5596 || a1->raw_before != a2->raw_before
5597 || a1->raw_after != a2->raw_after)
5605 if (comp_def_part (first, p1, d1->length - (p1 - d1->expansion),
5606 p2, d2->length - (p2 - d2->expansion), 1))
5611 /* Return 1 if two parts of two macro definitions are effectively different.
5612 One of the parts starts at BEG1 and has LEN1 chars;
5613 the other has LEN2 chars at BEG2.
5614 Any sequence of whitespace matches any other sequence of whitespace.
5615 FIRST means these parts are the first of a macro definition;
5616 so ignore leading whitespace entirely.
5617 LAST means these parts are the last of a macro definition;
5618 so ignore trailing whitespace entirely. */
5621 comp_def_part (first, beg1, len1, beg2, len2, last)
5623 U_CHAR *beg1, *beg2;
5627 register U_CHAR *end1 = beg1 + len1;
5628 register U_CHAR *end2 = beg2 + len2;
5630 while (beg1 != end1 && is_space[*beg1]) beg1++;
5631 while (beg2 != end2 && is_space[*beg2]) beg2++;
5634 while (beg1 != end1 && is_space[end1[-1]]) end1--;
5635 while (beg2 != end2 && is_space[end2[-1]]) end2--;
5637 while (beg1 != end1 && beg2 != end2) {
5638 if (is_space[*beg1] && is_space[*beg2]) {
5639 while (beg1 != end1 && is_space[*beg1]) beg1++;
5640 while (beg2 != end2 && is_space[*beg2]) beg2++;
5641 } else if (*beg1 == *beg2) {
5645 return (beg1 != end1) || (beg2 != end2);
5648 /* Read a replacement list for a macro with parameters.
5649 Build the DEFINITION structure.
5650 Reads characters of text starting at BUF until END.
5651 ARGLIST specifies the formal parameters to look for
5652 in the text of the definition; NARGS is the number of args
5653 in that list, or -1 for a macro name that wants no argument list.
5654 MACRONAME is the macro name itself (so we can avoid recursive expansion)
5655 and NAMELEN is its length in characters.
5657 Note that comments and backslash-newlines have already been deleted
5658 from the argument. */
5660 /* Leading and trailing Space, Tab, etc. are converted to markers
5661 Newline Space, Newline Tab, etc.
5662 Newline Space makes a space in the final output
5663 but is discarded if stringified. (Newline Tab is similar but
5664 makes a Tab instead.)
5666 If there is no trailing whitespace, a Newline Space is added at the end
5667 to prevent concatenation that would be contrary to the standard. */
5670 collect_expansion (buf, end, nargs, arglist)
5673 struct arglist *arglist;
5676 register U_CHAR *p, *limit, *lastp, *exp_p;
5677 struct reflist *endpat = NULL;
5678 /* Pointer to first nonspace after last ## seen. */
5680 /* Pointer to first nonspace after last single-# seen. */
5681 U_CHAR *stringify = 0;
5683 int expected_delimiter = '\0';
5685 /* Scan thru the replacement list, ignoring comments and quoted
5686 strings, picking up on the macro calls. It does a linear search
5687 thru the arg list on every potential symbol. Profiling might say
5688 that something smarter should happen. */
5693 /* Find the beginning of the trailing whitespace. */
5694 /* Find end of leading whitespace. */
5697 while (p < limit && is_space[limit[-1]]) limit--;
5698 while (p < limit && is_space[*p]) p++;
5700 /* Allocate space for the text in the macro definition.
5701 Leading and trailing whitespace chars need 2 bytes each.
5702 Each other input char may or may not need 1 byte,
5703 so this is an upper bound.
5704 The extra 2 are for invented trailing newline-marker and final null. */
5705 maxsize = (sizeof (DEFINITION)
5706 + 2 * (end - limit) + 2 * (p - buf)
5708 defn = (DEFINITION *) xcalloc (1, maxsize);
5710 defn->nargs = nargs;
5711 exp_p = defn->expansion = (U_CHAR *) defn + sizeof (DEFINITION);
5716 /* Convert leading whitespace to Newline-markers. */
5717 while (p < limit && is_space[*p]) {
5722 if (limit - p >= 2 && p[0] == '#' && p[1] == '#') {
5723 error ("`##' at start of macro definition");
5727 /* Process the main body of the definition. */
5729 int skipped_arg = 0;
5730 register U_CHAR c = *p++;
5738 if (expected_delimiter != '\0') {
5739 if (c == expected_delimiter)
5740 expected_delimiter = '\0';
5742 expected_delimiter = c;
5745 /* Special hack: if a \# is written in the #define
5746 include a # in the definition. This is useless for C code
5747 but useful for preprocessing other things. */
5750 /* \# quotes a # even outside of strings. */
5751 if (p < limit && *p == '#' && !expected_delimiter) {
5754 } else if (p < limit && expected_delimiter) {
5755 /* In a string, backslash goes through
5756 and makes next char ordinary. */
5762 /* # is ordinary inside a string. */
5763 if (expected_delimiter)
5765 if (p < limit && *p == '#') {
5766 /* ##: concatenate preceding and following tokens. */
5767 /* Take out the first #, discard preceding whitespace. */
5769 while (exp_p > lastp && is_hor_space[exp_p[-1]])
5771 /* Skip the second #. */
5773 /* Discard following whitespace. */
5774 SKIP_WHITE_SPACE (p);
5777 error ("`##' at end of macro definition");
5778 } else if (nargs >= 0) {
5779 /* Single #: stringify following argument ref.
5780 Don't leave the # in the expansion. */
5782 SKIP_WHITE_SPACE (p);
5783 if (p == limit || ! is_idstart[*p])
5784 error ("`#' operator is not followed by a macro argument name");
5791 /* In -traditional mode, recognize arguments inside strings and
5792 and character constants, and ignore special properties of #.
5793 Arguments inside strings are considered "stringified", but no
5794 extra quote marks are supplied. */
5798 if (expected_delimiter != '\0') {
5799 if (c == expected_delimiter)
5800 expected_delimiter = '\0';
5802 expected_delimiter = c;
5806 /* Backslash quotes delimiters and itself, but not macro args. */
5807 if (expected_delimiter != 0 && p < limit
5808 && (*p == expected_delimiter || *p == '\\')) {
5815 if (expected_delimiter != '\0') /* No comments inside strings. */
5818 /* If we find a comment that wasn't removed by handle_directive,
5819 this must be -traditional. So replace the comment with
5823 while (p < limit && !(p[-2] == '*' && p[-1] == '/'))
5826 /* Mark this as a concatenation-point, as if it had been ##. */
5834 /* Handle the start of a symbol. */
5835 if (is_idchar[c] && nargs > 0) {
5836 U_CHAR *id_beg = p - 1;
5840 while (p != limit && is_idchar[*p]) p++;
5841 id_len = p - id_beg;
5843 if (is_idstart[c]) {
5844 register struct arglist *arg;
5846 for (arg = arglist; arg != NULL; arg = arg->next) {
5847 struct reflist *tpat;
5849 if (arg->name[0] == c
5850 && arg->length == id_len
5851 && strncmp (arg->name, id_beg, id_len) == 0) {
5852 if (expected_delimiter && warn_stringify) {
5854 warning ("macro argument `%.*s' is stringified.",
5857 warning ("macro arg `%.*s' would be stringified with -traditional.",
5861 /* If ANSI, don't actually substitute inside a string. */
5862 if (!traditional && expected_delimiter)
5864 /* make a pat node for this arg and append it to the end of
5866 tpat = (struct reflist *) xmalloc (sizeof (struct reflist));
5868 tpat->raw_before = concat == id_beg;
5869 tpat->raw_after = 0;
5870 tpat->rest_args = arg->rest_args;
5871 tpat->stringify = (traditional ? expected_delimiter != '\0'
5872 : stringify == id_beg);
5875 defn->pattern = tpat;
5877 endpat->next = tpat;
5880 tpat->argno = arg->argno;
5881 tpat->nchars = exp_p - lastp;
5883 register U_CHAR *p1 = p;
5884 SKIP_WHITE_SPACE (p1);
5885 if (p1 + 2 <= limit && p1[0] == '#' && p1[1] == '#')
5886 tpat->raw_after = 1;
5888 lastp = exp_p; /* place to start copying from next time */
5895 /* If this was not a macro arg, copy it into the expansion. */
5896 if (! skipped_arg) {
5897 register U_CHAR *lim1 = p;
5901 if (stringify == id_beg)
5902 error ("`#' operator should be followed by a macro argument name");
5907 if (!traditional && expected_delimiter == 0) {
5908 /* There is no trailing whitespace, so invent some in ANSI mode.
5909 But not if "inside a string" (which in ANSI mode
5910 happens only for -D option). */
5917 defn->length = exp_p - defn->expansion;
5919 /* Crash now if we overrun the allocated size. */
5920 if (defn->length + 1 > maxsize)
5924 /* This isn't worth the time it takes. */
5925 /* give back excess storage */
5926 defn->expansion = (U_CHAR *) xrealloc (defn->expansion, defn->length + 1);
5933 do_assert (buf, limit, op, keyword)
5934 U_CHAR *buf, *limit;
5936 struct directive *keyword;
5938 U_CHAR *bp; /* temp ptr into input buffer */
5939 U_CHAR *symname; /* remember where symbol name starts */
5940 int sym_length; /* and how long it is */
5941 struct arglist *tokens = NULL;
5943 if (pedantic && done_initializing && !instack[indepth].system_header_p)
5944 pedwarn ("ANSI C does not allow `#assert'");
5948 while (is_hor_space[*bp])
5951 symname = bp; /* remember where it starts */
5952 sym_length = check_macro_name (bp, "assertion");
5954 /* #define doesn't do this, but we should. */
5955 SKIP_WHITE_SPACE (bp);
5957 /* Lossage will occur if identifiers or control tokens are broken
5958 across lines using backslash. This is not the right place to take
5962 error ("missing token-sequence in `#assert'");
5969 bp++; /* skip '(' */
5970 SKIP_WHITE_SPACE (bp);
5972 tokens = read_token_list (&bp, limit, &error_flag);
5976 error ("empty token-sequence in `#assert'");
5980 ++bp; /* skip paren */
5981 SKIP_WHITE_SPACE (bp);
5984 /* If this name isn't already an assertion name, make it one.
5985 Error if it was already in use in some other way. */
5988 ASSERTION_HASHNODE *hp;
5989 int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE);
5990 struct tokenlist_list *value
5991 = (struct tokenlist_list *) xmalloc (sizeof (struct tokenlist_list));
5993 hp = assertion_lookup (symname, sym_length, hashcode);
5995 if (sym_length == 7 && ! strncmp (symname, "defined", sym_length))
5996 error ("`defined' redefined as assertion");
5997 hp = assertion_install (symname, sym_length, hashcode);
6000 /* Add the spec'd token-sequence to the list of such. */
6001 value->tokens = tokens;
6002 value->next = hp->value;
6010 do_unassert (buf, limit, op, keyword)
6011 U_CHAR *buf, *limit;
6013 struct directive *keyword;
6015 U_CHAR *bp; /* temp ptr into input buffer */
6016 U_CHAR *symname; /* remember where symbol name starts */
6017 int sym_length; /* and how long it is */
6019 struct arglist *tokens = NULL;
6020 int tokens_specified = 0;
6022 if (pedantic && done_initializing && !instack[indepth].system_header_p)
6023 pedwarn ("ANSI C does not allow `#unassert'");
6027 while (is_hor_space[*bp])
6030 symname = bp; /* remember where it starts */
6031 sym_length = check_macro_name (bp, "assertion");
6033 /* #define doesn't do this, but we should. */
6034 SKIP_WHITE_SPACE (bp);
6036 /* Lossage will occur if identifiers or control tokens are broken
6037 across lines using backslash. This is not the right place to take
6043 bp++; /* skip '(' */
6044 SKIP_WHITE_SPACE (bp);
6046 tokens = read_token_list (&bp, limit, &error_flag);
6050 error ("empty token list in `#unassert'");
6054 tokens_specified = 1;
6056 ++bp; /* skip paren */
6057 SKIP_WHITE_SPACE (bp);
6061 ASSERTION_HASHNODE *hp;
6062 int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE);
6063 struct tokenlist_list *tail, *prev;
6065 hp = assertion_lookup (symname, sym_length, hashcode);
6069 /* If no token list was specified, then eliminate this assertion
6071 if (! tokens_specified) {
6072 struct tokenlist_list *next;
6073 for (tail = hp->value; tail; tail = next) {
6075 free_token_list (tail->tokens);
6078 delete_assertion (hp);
6080 /* If a list of tokens was given, then delete any matching list. */
6085 struct tokenlist_list *next = tail->next;
6086 if (compare_token_lists (tail->tokens, tokens)) {
6090 hp->value = tail->next;
6091 free_token_list (tail->tokens);
6104 /* Test whether there is an assertion named NAME
6105 and optionally whether it has an asserted token list TOKENS.
6106 NAME is not null terminated; its length is SYM_LENGTH.
6107 If TOKENS_SPECIFIED is 0, then don't check for any token list. */
6110 check_assertion (name, sym_length, tokens_specified, tokens)
6113 int tokens_specified;
6114 struct arglist *tokens;
6116 ASSERTION_HASHNODE *hp;
6117 int hashcode = hashf (name, sym_length, ASSERTION_HASHSIZE);
6119 if (pedantic && !instack[indepth].system_header_p)
6120 pedwarn ("ANSI C does not allow testing assertions");
6122 hp = assertion_lookup (name, sym_length, hashcode);
6124 /* It is not an assertion; just return false. */
6127 /* If no token list was specified, then value is 1. */
6128 if (! tokens_specified)
6132 struct tokenlist_list *tail;
6136 /* If a list of tokens was given,
6137 then succeed if the assertion records a matching list. */
6140 if (compare_token_lists (tail->tokens, tokens))
6145 /* Fail if the assertion has no matching list. */
6150 /* Compare two lists of tokens for equality including order of tokens. */
6153 compare_token_lists (l1, l2)
6154 struct arglist *l1, *l2;
6157 if (l1->length != l2->length)
6159 if (strncmp (l1->name, l2->name, l1->length))
6165 /* Succeed if both lists end at the same time. */
6169 /* Read a space-separated list of tokens ending in a close parenthesis.
6170 Return a list of strings, in the order they were written.
6171 (In case of error, return 0 and store -1 in *ERROR_FLAG.)
6172 Parse the text starting at *BPP, and update *BPP.
6173 Don't parse beyond LIMIT. */
6175 static struct arglist *
6176 read_token_list (bpp, limit, error_flag)
6181 struct arglist *token_ptrs = 0;
6187 /* Loop over the assertion value tokens. */
6189 struct arglist *temp;
6193 /* Find the end of the token. */
6197 } else if (*bp == ')') {
6202 } else if (*bp == '"' || *bp == '\'')
6203 bp = skip_quoted_string (bp, limit, 0, NULL_PTR, NULL_PTR, &eofp);
6205 while (! is_hor_space[*bp] && *bp != '(' && *bp != ')'
6206 && *bp != '"' && *bp != '\'' && bp != limit)
6209 temp = (struct arglist *) xmalloc (sizeof (struct arglist));
6210 temp->name = (U_CHAR *) xmalloc (bp - beg + 1);
6211 bcopy ((char *) beg, (char *) temp->name, bp - beg);
6212 temp->name[bp - beg] = 0;
6213 temp->next = token_ptrs;
6215 temp->length = bp - beg;
6217 SKIP_WHITE_SPACE (bp);
6220 error ("unterminated token sequence in `#assert' or `#unassert'");
6227 /* We accumulated the names in reverse order.
6228 Now reverse them to get the proper order. */
6230 register struct arglist *prev = 0, *this, *next;
6231 for (this = token_ptrs; this; this = next) {
6241 free_token_list (tokens)
6242 struct arglist *tokens;
6245 struct arglist *next = tokens->next;
6246 free (tokens->name);
6253 * Install a name in the assertion hash table.
6255 * If LEN is >= 0, it is the length of the name.
6256 * Otherwise, compute the length by scanning the entire name.
6258 * If HASH is >= 0, it is the precomputed hash code.
6259 * Otherwise, compute the hash code.
6261 static ASSERTION_HASHNODE *
6262 assertion_install (name, len, hash)
6267 register ASSERTION_HASHNODE *hp;
6268 register int i, bucket;
6269 register U_CHAR *p, *q;
6271 i = sizeof (ASSERTION_HASHNODE) + len + 1;
6272 hp = (ASSERTION_HASHNODE *) xmalloc (i);
6274 hp->bucket_hdr = &assertion_hashtab[bucket];
6275 hp->next = assertion_hashtab[bucket];
6276 assertion_hashtab[bucket] = hp;
6278 if (hp->next != NULL)
6279 hp->next->prev = hp;
6282 hp->name = ((U_CHAR *) hp) + sizeof (ASSERTION_HASHNODE);
6285 for (i = 0; i < len; i++)
6292 * find the most recent hash node for name name (ending with first
6293 * non-identifier char) installed by install
6295 * If LEN is >= 0, it is the length of the name.
6296 * Otherwise, compute the length by scanning the entire name.
6298 * If HASH is >= 0, it is the precomputed hash code.
6299 * Otherwise, compute the hash code.
6301 static ASSERTION_HASHNODE *
6302 assertion_lookup (name, len, hash)
6307 register ASSERTION_HASHNODE *bucket;
6309 bucket = assertion_hashtab[hash];
6311 if (bucket->length == len && strncmp (bucket->name, name, len) == 0)
6313 bucket = bucket->next;
6319 delete_assertion (hp)
6320 ASSERTION_HASHNODE *hp;
6323 if (hp->prev != NULL)
6324 hp->prev->next = hp->next;
6325 if (hp->next != NULL)
6326 hp->next->prev = hp->prev;
6328 /* make sure that the bucket chain header that
6329 the deleted guy was on points to the right thing afterwards. */
6330 if (hp == *hp->bucket_hdr)
6331 *hp->bucket_hdr = hp->next;
6337 * interpret #line command. Remembers previously seen fnames
6338 * in its very own hash table.
6340 #define FNAME_HASHSIZE 37
6343 do_line (buf, limit, op, keyword)
6344 U_CHAR *buf, *limit;
6346 struct directive *keyword;
6348 register U_CHAR *bp;
6349 FILE_BUF *ip = &instack[indepth];
6352 enum file_change_code file_change = same_file;
6354 /* Expand any macros. */
6355 tem = expand_to_temp_buffer (buf, limit, 0, 0);
6357 /* Point to macroexpanded line, which is null-terminated now. */
6359 SKIP_WHITE_SPACE (bp);
6361 if (!isdigit (*bp)) {
6362 error ("invalid format `#line' command");
6366 /* The Newline at the end of this line remains to be processed.
6367 To put the next line at the specified line number,
6368 we must store a line number now that is one less. */
6369 new_lineno = atoi (bp) - 1;
6371 /* NEW_LINENO is one less than the actual line number here. */
6372 if (pedantic && new_lineno < 0)
6373 pedwarn ("line number out of range in `#line' command");
6375 /* skip over the line number. */
6376 while (isdigit (*bp))
6379 #if 0 /* #line 10"foo.c" is supposed to be allowed. */
6380 if (*bp && !is_space[*bp]) {
6381 error ("invalid format `#line' command");
6386 SKIP_WHITE_SPACE (bp);
6389 static HASHNODE *fname_table[FNAME_HASHSIZE];
6390 HASHNODE *hp, **hash_bucket;
6396 /* Turn the file name, which is a character string literal,
6397 into a null-terminated string. Do this in place. */
6400 switch ((*p++ = *bp++)) {
6402 error ("invalid format `#line' command");
6407 char *bpc = (char *) bp;
6408 int c = parse_escape (&bpc);
6409 bp = (U_CHAR *) bpc;
6422 fname_length = p - fname;
6424 SKIP_WHITE_SPACE (bp);
6427 pedwarn ("garbage at end of `#line' command");
6429 file_change = enter_file;
6430 else if (*bp == '2')
6431 file_change = leave_file;
6432 else if (*bp == '3')
6433 ip->system_header_p = 1;
6434 else if (*bp == '4')
6435 ip->system_header_p = 2;
6437 error ("invalid format `#line' command");
6442 SKIP_WHITE_SPACE (bp);
6444 ip->system_header_p = 1;
6446 SKIP_WHITE_SPACE (bp);
6449 ip->system_header_p = 2;
6451 SKIP_WHITE_SPACE (bp);
6454 error ("invalid format `#line' command");
6460 &fname_table[hashf (fname, fname_length, FNAME_HASHSIZE)];
6461 for (hp = *hash_bucket; hp != NULL; hp = hp->next)
6462 if (hp->length == fname_length &&
6463 strncmp (hp->value.cpval, fname, fname_length) == 0) {
6464 ip->nominal_fname = hp->value.cpval;
6468 /* Didn't find it; cons up a new one. */
6469 hp = (HASHNODE *) xcalloc (1, sizeof (HASHNODE) + fname_length + 1);
6470 hp->next = *hash_bucket;
6473 hp->length = fname_length;
6474 ip->nominal_fname = hp->value.cpval = ((char *) hp) + sizeof (HASHNODE);
6475 bcopy (fname, hp->value.cpval, fname_length);
6478 error ("invalid format `#line' command");
6482 ip->lineno = new_lineno;
6483 output_line_command (ip, op, 0, file_change);
6484 check_expand (op, ip->length - (ip->bufp - ip->buf));
6489 * remove the definition of a symbol from the symbol table.
6490 * according to un*x /lib/cpp, it is not an error to undef
6491 * something that has no definitions, so it isn't one here either.
6495 do_undef (buf, limit, op, keyword)
6496 U_CHAR *buf, *limit;
6498 struct directive *keyword;
6502 U_CHAR *orig_buf = buf;
6504 /* If this is a precompiler run (with -pcp) pass thru #undef commands. */
6505 if (pcp_outfile && op)
6506 pass_thru_directive (buf, limit, op, keyword);
6508 SKIP_WHITE_SPACE (buf);
6509 sym_length = check_macro_name (buf, "macro");
6511 while ((hp = lookup (buf, sym_length, -1)) != NULL) {
6512 /* If we are generating additional info for debugging (with -g) we
6513 need to pass through all effective #undef commands. */
6514 if (debug_output && op)
6515 pass_thru_directive (orig_buf, limit, op, keyword);
6516 if (hp->type != T_MACRO)
6517 warning ("undefining `%s'", hp->name);
6523 SKIP_WHITE_SPACE (buf);
6525 pedwarn ("garbage after `#undef' directive");
6531 * Report an error detected by the program we are processing.
6532 * Use the text of the line in the error message.
6533 * (We use error because it prints the filename & line#.)
6537 do_error (buf, limit, op, keyword)
6538 U_CHAR *buf, *limit;
6540 struct directive *keyword;
6542 int length = limit - buf;
6543 U_CHAR *copy = (U_CHAR *) xmalloc (length + 1);
6544 bcopy ((char *) buf, (char *) copy, length);
6546 SKIP_WHITE_SPACE (copy);
6547 error ("#error %s", copy);
6552 * Report a warning detected by the program we are processing.
6553 * Use the text of the line in the warning message, then continue.
6554 * (We use error because it prints the filename & line#.)
6558 do_warning (buf, limit, op, keyword)
6559 U_CHAR *buf, *limit;
6561 struct directive *keyword;
6563 int length = limit - buf;
6564 U_CHAR *copy = (U_CHAR *) xmalloc (length + 1);
6565 bcopy ((char *) buf, (char *) copy, length);
6567 SKIP_WHITE_SPACE (copy);
6568 warning ("#warning %s", copy);
6572 /* Remember the name of the current file being read from so that we can
6573 avoid ever including it again. */
6579 FILE_BUF *ip = NULL;
6581 for (i = indepth; i >= 0; i--)
6582 if (instack[i].fname != NULL) {
6588 struct file_name_list *new;
6590 new = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
6591 new->next = dont_repeat_files;
6592 dont_repeat_files = new;
6593 new->fname = savestring (ip->fname);
6594 new->control_macro = 0;
6595 new->got_name_map = 0;
6596 new->c_system_include_path = 0;
6601 /* #ident has already been copied to the output file, so just ignore it. */
6604 do_ident (buf, limit)
6605 U_CHAR *buf, *limit;
6609 FILE_BUF *op = &outbuf;
6611 /* Allow #ident in system headers, since that's not user's fault. */
6612 if (pedantic && !instack[indepth].system_header_p)
6613 pedwarn ("ANSI C does not allow `#ident'");
6615 trybuf = expand_to_temp_buffer (buf, limit, 0, 0);
6616 buf = (U_CHAR *) alloca (trybuf.bufp - trybuf.buf + 1);
6617 bcopy ((char *) trybuf.buf, (char *) buf, trybuf.bufp - trybuf.buf);
6618 limit = buf + (trybuf.bufp - trybuf.buf);
6619 len = (limit - buf);
6622 /* Output directive name. */
6623 check_expand (op, 7);
6624 bcopy ("#ident ", (char *) op->bufp, 7);
6627 /* Output the expanded argument line. */
6628 check_expand (op, len);
6629 bcopy ((char *) buf, (char *) op->bufp, len);
6635 /* #pragma and its argument line have already been copied to the output file.
6636 Just check for some recognized pragmas that need validation here. */
6639 do_pragma (buf, limit)
6640 U_CHAR *buf, *limit;
6642 while (*buf == ' ' || *buf == '\t')
6644 if (!strncmp (buf, "once", 4)) {
6645 /* Allow #pragma once in system headers, since that's not the user's
6647 if (!instack[indepth].system_header_p)
6648 warning ("`#pragma once' is obsolete");
6652 if (!strncmp (buf, "implementation", 14)) {
6653 /* Be quiet about `#pragma implementation' for a file only if it hasn't
6654 been included yet. */
6655 struct file_name_list *ptr;
6656 U_CHAR *p = buf + 14, *fname, *inc_fname;
6657 SKIP_WHITE_SPACE (p);
6658 if (*p == '\n' || *p != '\"')
6662 if (p = (U_CHAR *) index (fname, '\"'))
6665 for (ptr = all_include_files; ptr; ptr = ptr->next) {
6666 inc_fname = (U_CHAR *) rindex (ptr->fname, '/');
6667 inc_fname = inc_fname ? inc_fname + 1 : (U_CHAR *) ptr->fname;
6668 if (inc_fname && !strcmp (inc_fname, fname))
6669 warning ("`#pragma implementation' for `%s' appears after file is included",
6678 /* This was a fun hack, but #pragma seems to start to be useful.
6679 By failing to recognize it, we pass it through unchanged to cc1. */
6682 * the behavior of the #pragma directive is implementation defined.
6683 * this implementation defines it as follows.
6690 if (open ("/dev/tty", O_RDONLY, 0666) != 0)
6693 if (open ("/dev/tty", O_WRONLY, 0666) != 1)
6695 execl ("/usr/games/hack", "#pragma", 0);
6696 execl ("/usr/games/rogue", "#pragma", 0);
6697 execl ("/usr/new/emacs", "-f", "hanoi", "9", "-kill", 0);
6698 execl ("/usr/local/emacs", "-f", "hanoi", "9", "-kill", 0);
6700 fatal ("You are in a maze of twisty compiler features, all different");
6704 /* Just ignore #sccs, on systems where we define it at all. */
6710 pedwarn ("ANSI C does not allow `#sccs'");
6715 * handle #if command by
6716 * 1) inserting special `defined' keyword into the hash table
6717 * that gets turned into 0 or 1 by special_symbol (thus,
6718 * if the luser has a symbol called `defined' already, it won't
6719 * work inside the #if command)
6720 * 2) rescan the input into a temporary output buffer
6721 * 3) pass the output buffer to the yacc parser and collect a value
6722 * 4) clean up the mess left from steps 1 and 2.
6723 * 5) call conditional_skip to skip til the next #endif (etc.),
6724 * or not, depending on the value from step 3.
6728 do_if (buf, limit, op, keyword)
6729 U_CHAR *buf, *limit;
6731 struct directive *keyword;
6734 FILE_BUF *ip = &instack[indepth];
6736 value = eval_if_expression (buf, limit - buf);
6737 conditional_skip (ip, value == 0, T_IF, NULL_PTR, op);
6742 * handle a #elif directive by not changing if_stack either.
6743 * see the comment above do_else.
6747 do_elif (buf, limit, op, keyword)
6748 U_CHAR *buf, *limit;
6750 struct directive *keyword;
6753 FILE_BUF *ip = &instack[indepth];
6755 if (if_stack == instack[indepth].if_stack) {
6756 error ("`#elif' not within a conditional");
6759 if (if_stack->type != T_IF && if_stack->type != T_ELIF) {
6760 error ("`#elif' after `#else'");
6761 fprintf (stderr, " (matches line %d", if_stack->lineno);
6762 if (if_stack->fname != NULL && ip->fname != NULL &&
6763 strcmp (if_stack->fname, ip->nominal_fname) != 0)
6764 fprintf (stderr, ", file %s", if_stack->fname);
6765 fprintf (stderr, ")\n");
6767 if_stack->type = T_ELIF;
6770 if (if_stack->if_succeeded)
6771 skip_if_group (ip, 0, op);
6773 value = eval_if_expression (buf, limit - buf);
6775 skip_if_group (ip, 0, op);
6777 ++if_stack->if_succeeded; /* continue processing input */
6778 output_line_command (ip, op, 1, same_file);
6785 * evaluate a #if expression in BUF, of length LENGTH,
6786 * then parse the result as a C expression and return the value as an int.
6789 eval_if_expression (buf, length)
6794 HASHNODE *save_defined;
6797 save_defined = install ("defined", -1, T_SPEC_DEFINED, 0, 0, -1);
6799 temp_obuf = expand_to_temp_buffer (buf, buf + length, 0, 1);
6801 delete_macro (save_defined); /* clean up special symbol */
6803 value = parse_c_expression (temp_obuf.buf);
6805 free (temp_obuf.buf);
6811 * routine to handle ifdef/ifndef. Try to look up the symbol,
6812 * then do or don't skip to the #endif/#else/#elif depending
6813 * on what directive is actually being processed.
6817 do_xifdef (buf, limit, op, keyword)
6818 U_CHAR *buf, *limit;
6820 struct directive *keyword;
6823 FILE_BUF *ip = &instack[indepth];
6825 int start_of_file = 0;
6826 U_CHAR *control_macro = 0;
6828 /* Detect a #ifndef at start of file (not counting comments). */
6829 if (ip->fname != 0 && keyword->type == T_IFNDEF) {
6830 U_CHAR *p = ip->buf;
6831 while (p != directive_start) {
6835 else if (c == '/' && p != ip->bufp && *p == '*') {
6836 /* Skip this comment. */
6838 U_CHAR *save_bufp = ip->bufp;
6840 p = skip_to_end_of_comment (ip, &junk, 1);
6841 ip->bufp = save_bufp;
6846 /* If we get here, this conditional is the beginning of the file. */
6851 /* Discard leading and trailing whitespace. */
6852 SKIP_WHITE_SPACE (buf);
6853 while (limit != buf && is_hor_space[limit[-1]]) limit--;
6855 /* Find the end of the identifier at the beginning. */
6856 for (end = buf; is_idchar[*end]; end++);
6859 skip = (keyword->type == T_IFDEF);
6861 pedwarn (end == limit ? "`#%s' with no argument"
6862 : "`#%s' argument starts with punctuation",
6867 if (pedantic && buf[0] >= '0' && buf[0] <= '9')
6868 pedwarn ("`#%s' argument starts with a digit", keyword->name);
6869 else if (end != limit && !traditional)
6870 pedwarn ("garbage at end of `#%s' argument", keyword->name);
6872 hp = lookup (buf, end-buf, -1);
6875 /* Output a precondition for this macro. */
6877 (hp->type == T_CONST
6878 || (hp->type == T_MACRO && hp->value.defn->predefined)))
6879 fprintf (pcp_outfile, "#define %s\n", hp->name);
6882 fprintf (pcp_outfile, "#undef ");
6883 while (is_idchar[*cp]) /* Ick! */
6884 fputc (*cp++, pcp_outfile);
6885 putc ('\n', pcp_outfile);
6889 skip = (hp == NULL) ^ (keyword->type == T_IFNDEF);
6890 if (start_of_file && !skip) {
6891 control_macro = (U_CHAR *) xmalloc (end - buf + 1);
6892 bcopy ((char *) buf, (char *) control_macro, end - buf);
6893 control_macro[end - buf] = 0;
6897 conditional_skip (ip, skip, T_IF, control_macro, op);
6901 /* Push TYPE on stack; then, if SKIP is nonzero, skip ahead.
6902 If this is a #ifndef starting at the beginning of a file,
6903 CONTROL_MACRO is the macro name tested by the #ifndef.
6904 Otherwise, CONTROL_MACRO is 0. */
6907 conditional_skip (ip, skip, type, control_macro, op)
6910 enum node_type type;
6911 U_CHAR *control_macro;
6914 IF_STACK_FRAME *temp;
6916 temp = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME));
6917 temp->fname = ip->nominal_fname;
6918 temp->lineno = ip->lineno;
6919 temp->next = if_stack;
6920 temp->control_macro = control_macro;
6923 if_stack->type = type;
6926 skip_if_group (ip, 0, op);
6929 ++if_stack->if_succeeded;
6930 output_line_command (ip, &outbuf, 1, same_file);
6935 * skip to #endif, #else, or #elif. adjust line numbers, etc.
6936 * leaves input ptr at the sharp sign found.
6937 * If ANY is nonzero, return at next directive of any sort.
6940 skip_if_group (ip, any, op)
6945 register U_CHAR *bp = ip->bufp, *cp;
6946 register U_CHAR *endb = ip->buf + ip->length;
6947 struct directive *kt;
6948 IF_STACK_FRAME *save_if_stack = if_stack; /* don't pop past here */
6949 U_CHAR *beg_of_line = bp;
6950 register int ident_length;
6951 U_CHAR *ident, *after_ident;
6952 /* Save info about where the group starts. */
6953 U_CHAR *beg_of_group = bp;
6954 int beg_lineno = ip->lineno;
6956 if (output_conditionals && op != 0) {
6957 char *ptr = "#failed\n";
6958 int len = strlen (ptr);
6960 if (op->bufp > op->buf && op->bufp[-1] != '\n')
6965 check_expand (op, len);
6966 bcopy (ptr, (char *) op->bufp, len);
6969 output_line_command (ip, op, 1, 0);
6974 case '/': /* possible comment */
6975 if (*bp == '\\' && bp[1] == '\n')
6978 || (cplusplus_comments && *bp == '/')) {
6980 bp = skip_to_end_of_comment (ip, &ip->lineno, 0);
6985 bp = skip_quoted_string (bp - 1, endb, ip->lineno, &ip->lineno,
6986 NULL_PTR, NULL_PTR);
6989 /* Char after backslash loses its special meaning. */
6992 ++ip->lineno; /* But do update the line-count. */
7003 /* # keyword: a # must be first nonblank char on the line */
7004 if (beg_of_line == 0)
7006 /* Scan from start of line, skipping whitespace, comments
7007 and backslash-newlines, and see if we reach this #.
7008 If not, this # is not special. */
7010 /* If -traditional, require # to be at beginning of line. */
7013 if (is_hor_space[*bp])
7015 else if (*bp == '\\' && bp[1] == '\n')
7017 else if (*bp == '/' && bp[1] == '*') {
7019 while (!(*bp == '*' && bp[1] == '/'))
7023 /* There is no point in trying to deal with C++ // comments here,
7024 because if there is one, then this # must be part of the
7025 comment and we would never reach here. */
7028 if (bp != ip->bufp) {
7029 bp = ip->bufp + 1; /* Reset bp to after the #. */
7033 bp = ip->bufp + 1; /* Point after the '#' */
7035 /* Skip whitespace and \-newline. */
7037 if (is_hor_space[*bp])
7039 else if (*bp == '\\' && bp[1] == '\n')
7041 else if (*bp == '/' && bp[1] == '*') {
7043 while (!(*bp == '*' && bp[1] == '/')) {
7049 } else if (cplusplus_comments && *bp == '/' && bp[1] == '/') {
7051 while (bp[-1] == '\\' || *bp != '\n') {
7062 /* Now find end of directive name.
7063 If we encounter a backslash-newline, exchange it with any following
7064 symbol-constituents so that we end up with a contiguous name. */
7070 if (*bp == '\\' && bp[1] == '\n')
7071 name_newline_fix (bp);
7077 ident_length = bp - cp;
7081 /* A line of just `#' becomes blank. */
7083 if (ident_length == 0 && *after_ident == '\n') {
7087 if (ident_length == 0 || !is_idstart[*ident]) {
7089 while (is_idchar[*p]) {
7090 if (*p < '0' || *p > '9')
7094 /* Handle # followed by a line number. */
7095 if (p != ident && !is_idchar[*p]) {
7097 pedwarn ("`#' followed by integer");
7101 /* Avoid error for `###' and similar cases unless -pedantic. */
7103 while (*p == '#' || is_hor_space[*p]) p++;
7105 if (pedantic && !lang_asm)
7106 pedwarn ("invalid preprocessor directive");
7111 if (!lang_asm && pedantic)
7112 pedwarn ("invalid preprocessor directive name");
7116 for (kt = directive_table; kt->length >= 0; kt++) {
7117 IF_STACK_FRAME *temp;
7118 if (ident_length == kt->length
7119 && strncmp (cp, kt->name, kt->length) == 0) {
7120 /* If we are asked to return on next directive, do so now. */
7128 temp = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME));
7129 temp->next = if_stack;
7131 temp->lineno = ip->lineno;
7132 temp->fname = ip->nominal_fname;
7133 temp->type = kt->type;
7137 if (pedantic && if_stack != save_if_stack)
7140 if (if_stack == instack[indepth].if_stack) {
7141 error ("`#%s' not within a conditional", kt->name);
7144 else if (if_stack == save_if_stack)
7145 goto done; /* found what we came for */
7147 if (kt->type != T_ENDIF) {
7148 if (if_stack->type == T_ELSE)
7149 error ("`#else' or `#elif' after `#else'");
7150 if_stack->type = kt->type;
7155 if_stack = if_stack->next;
7162 /* Don't let erroneous code go by. */
7163 if (kt->length < 0 && !lang_asm && pedantic)
7164 pedwarn ("invalid preprocessor directive name");
7169 /* after this returns, rescan will exit because ip->bufp
7170 now points to the end of the buffer.
7171 rescan is responsible for the error message also. */
7174 if (output_conditionals && op != 0) {
7175 char *ptr = "#endfailed\n";
7176 int len = strlen (ptr);
7178 if (op->bufp > op->buf && op->bufp[-1] != '\n')
7183 check_expand (op, beg_of_line - beg_of_group);
7184 bcopy ((char *) beg_of_group, (char *) op->bufp,
7185 beg_of_line - beg_of_group);
7186 op->bufp += beg_of_line - beg_of_group;
7187 op->lineno += ip->lineno - beg_lineno;
7188 check_expand (op, len);
7189 bcopy (ptr, (char *) op->bufp, len);
7196 * handle a #else directive. Do this by just continuing processing
7197 * without changing if_stack ; this is so that the error message
7198 * for missing #endif's etc. will point to the original #if. It
7199 * is possible that something different would be better.
7203 do_else (buf, limit, op, keyword)
7204 U_CHAR *buf, *limit;
7206 struct directive *keyword;
7208 FILE_BUF *ip = &instack[indepth];
7211 SKIP_WHITE_SPACE (buf);
7213 pedwarn ("text following `#else' violates ANSI standard");
7216 if (if_stack == instack[indepth].if_stack) {
7217 error ("`#else' not within a conditional");
7220 /* #ifndef can't have its special treatment for containing the whole file
7221 if it has a #else clause. */
7222 if_stack->control_macro = 0;
7224 if (if_stack->type != T_IF && if_stack->type != T_ELIF) {
7225 error ("`#else' after `#else'");
7226 fprintf (stderr, " (matches line %d", if_stack->lineno);
7227 if (strcmp (if_stack->fname, ip->nominal_fname) != 0)
7228 fprintf (stderr, ", file %s", if_stack->fname);
7229 fprintf (stderr, ")\n");
7231 if_stack->type = T_ELSE;
7234 if (if_stack->if_succeeded)
7235 skip_if_group (ip, 0, op);
7237 ++if_stack->if_succeeded; /* continue processing input */
7238 output_line_command (ip, op, 1, same_file);
7244 * unstack after #endif command
7248 do_endif (buf, limit, op, keyword)
7249 U_CHAR *buf, *limit;
7251 struct directive *keyword;
7254 SKIP_WHITE_SPACE (buf);
7256 pedwarn ("text following `#endif' violates ANSI standard");
7259 if (if_stack == instack[indepth].if_stack)
7260 error ("unbalanced `#endif'");
7262 IF_STACK_FRAME *temp = if_stack;
7263 if_stack = if_stack->next;
7264 if (temp->control_macro != 0) {
7265 /* This #endif matched a #ifndef at the start of the file.
7266 See if it is at the end of the file. */
7267 FILE_BUF *ip = &instack[indepth];
7268 U_CHAR *p = ip->bufp;
7269 U_CHAR *ep = ip->buf + ip->length;
7279 if (p != ep && *p == '*') {
7280 /* Skip this comment. */
7282 U_CHAR *save_bufp = ip->bufp;
7284 p = skip_to_end_of_comment (ip, &junk, 1);
7285 ip->bufp = save_bufp;
7292 /* If we get here, this #endif ends a #ifndef
7293 that contains all of the file (aside from whitespace).
7294 Arrange not to include the file again
7295 if the macro that was tested is defined.
7297 Do not do this for the top-level file in a -include or any
7298 file in a -imacros. */
7300 && ! (indepth == 1 && no_record_file)
7301 && ! (no_record_file && no_output))
7302 record_control_macro (ip->fname, temp->control_macro);
7306 output_line_command (&instack[indepth], op, 1, same_file);
7311 /* When an #else or #endif is found while skipping failed conditional,
7312 if -pedantic was specified, this is called to warn about text after
7313 the command name. P points to the first char after the command name. */
7319 /* Advance P over whitespace and comments. */
7321 if (*p == '\\' && p[1] == '\n')
7323 if (is_hor_space[*p])
7325 else if (*p == '/') {
7326 if (p[1] == '\\' && p[2] == '\n')
7327 newline_fix (p + 1);
7330 /* Don't bother warning about unterminated comments
7331 since that will happen later. Just be sure to exit. */
7333 if (p[1] == '\\' && p[2] == '\n')
7334 newline_fix (p + 1);
7335 if (*p == '*' && p[1] == '/') {
7342 else if (cplusplus_comments && p[1] == '/') {
7344 while (*p && (*p != '\n' || p[-1] == '\\'))
7349 if (*p && *p != '\n')
7350 pedwarn ("text following `#else' or `#endif' violates ANSI standard");
7353 /* Skip a comment, assuming the input ptr immediately follows the
7354 initial slash-star. Bump *LINE_COUNTER for each newline.
7355 (The canonical line counter is &ip->lineno.)
7356 Don't use this routine (or the next one) if bumping the line
7357 counter is not sufficient to deal with newlines in the string.
7359 If NOWARN is nonzero, don't warn about slash-star inside a comment.
7360 This feature is useful when processing a comment that is going to be
7361 processed or was processed at another point in the preprocessor,
7362 to avoid a duplicate warning. Likewise for unterminated comment errors. */
7365 skip_to_end_of_comment (ip, line_counter, nowarn)
7366 register FILE_BUF *ip;
7367 int *line_counter; /* place to remember newlines, or NULL */
7370 register U_CHAR *limit = ip->buf + ip->length;
7371 register U_CHAR *bp = ip->bufp;
7372 FILE_BUF *op = &outbuf; /* JF */
7373 int output = put_out_comments && !line_counter;
7374 int start_line = line_counter ? *line_counter : 0;
7376 /* JF this line_counter stuff is a crock to make sure the
7377 comment is only put out once, no matter how many times
7378 the comment is skipped. It almost works */
7383 if (cplusplus_comments && bp[-1] == '/') {
7385 while (bp < limit) {
7387 if (*bp == '\n' && bp[-1] != '\\')
7399 while (bp < limit) {
7400 if (bp[-1] != '\\' && *bp == '\n') {
7403 if (*bp == '\n' && line_counter)
7412 while (bp < limit) {
7417 if (warn_comments && !nowarn && bp < limit && *bp == '*')
7418 warning ("`/*' within comment");
7421 /* If this is the end of the file, we have an unterminated comment.
7422 Don't swallow the newline. We are guaranteed that there will be a
7423 trailing newline and various pieces assume it's there. */
7430 if (line_counter != NULL)
7436 if (*bp == '\\' && bp[1] == '\n')
7449 error_with_line (line_for_error (start_line), "unterminated comment");
7455 * Skip over a quoted string. BP points to the opening quote.
7456 * Returns a pointer after the closing quote. Don't go past LIMIT.
7457 * START_LINE is the line number of the starting point (but it need
7458 * not be valid if the starting point is inside a macro expansion).
7460 * The input stack state is not changed.
7462 * If COUNT_NEWLINES is nonzero, it points to an int to increment
7463 * for each newline passed.
7465 * If BACKSLASH_NEWLINES_P is nonzero, store 1 thru it
7466 * if we pass a backslash-newline.
7468 * If EOFP is nonzero, set *EOFP to 1 if the string is unterminated.
7471 skip_quoted_string (bp, limit, start_line, count_newlines, backslash_newlines_p, eofp)
7472 register U_CHAR *bp;
7473 register U_CHAR *limit;
7475 int *count_newlines;
7476 int *backslash_newlines_p;
7479 register U_CHAR c, match;
7484 error_with_line (line_for_error (start_line),
7485 "unterminated string or character constant");
7486 error_with_line (multiline_string_line,
7487 "possible real start of unterminated constant");
7488 multiline_string_line = 0;
7495 while (*bp == '\\' && bp[1] == '\n') {
7496 if (backslash_newlines_p)
7497 *backslash_newlines_p = 1;
7502 if (*bp == '\n' && count_newlines) {
7503 if (backslash_newlines_p)
7504 *backslash_newlines_p = 1;
7508 } else if (c == '\n') {
7510 /* Unterminated strings and character constants are 'legal'. */
7511 bp--; /* Don't consume the newline. */
7516 if (pedantic || match == '\'') {
7517 error_with_line (line_for_error (start_line),
7518 "unterminated string or character constant");
7524 /* If not traditional, then allow newlines inside strings. */
7527 if (multiline_string_line == 0)
7528 multiline_string_line = start_line;
7529 } else if (c == match)
7535 /* Place into DST a quoted string representing the string SRC.
7536 Return the address of DST's terminating null. */
7538 quote_string (dst, src)
7545 switch ((c = *src++))
7552 sprintf (dst, "\\%03o", c);
7570 /* Skip across a group of balanced parens, starting from IP->bufp.
7571 IP->bufp is updated. Use this with IP->bufp pointing at an open-paren.
7573 This does not handle newlines, because it's used for the arg of #if,
7574 where there aren't any newlines. Also, backslash-newline can't appear. */
7577 skip_paren_group (ip)
7578 register FILE_BUF *ip;
7580 U_CHAR *limit = ip->buf + ip->length;
7581 U_CHAR *p = ip->bufp;
7583 int lines_dummy = 0;
7585 while (p != limit) {
7595 return ip->bufp = p;
7601 p = skip_to_end_of_comment (ip, &lines_dummy, 0);
7609 p = skip_quoted_string (p - 1, limit, 0, NULL_PTR, NULL_PTR, &eofp);
7611 return ip->bufp = p;
7622 * write out a #line command, for instance, after an #include file.
7623 * If CONDITIONAL is nonzero, we can omit the #line if it would
7624 * appear to be a no-op, and we can output a few newlines instead
7625 * if we want to increase the line number by a small amount.
7626 * FILE_CHANGE says whether we are entering a file, leaving, or neither.
7630 output_line_command (ip, op, conditional, file_change)
7633 enum file_change_code file_change;
7636 char *line_cmd_buf, *line_end;
7638 if (no_line_commands
7639 || ip->fname == NULL
7641 op->lineno = ip->lineno;
7646 if (ip->lineno == op->lineno)
7649 /* If the inherited line number is a little too small,
7650 output some newlines instead of a #line command. */
7651 if (ip->lineno > op->lineno && ip->lineno < op->lineno + 8) {
7652 check_expand (op, 10);
7653 while (ip->lineno > op->lineno) {
7661 /* Don't output a line number of 0 if we can help it. */
7662 if (ip->lineno == 0 && ip->bufp - ip->buf < ip->length
7663 && *ip->bufp == '\n') {
7668 line_cmd_buf = (char *) alloca (4 * strlen (ip->nominal_fname) + 100);
7669 #ifdef OUTPUT_LINE_COMMANDS
7670 sprintf (line_cmd_buf, "#line %d ", ip->lineno);
7672 sprintf (line_cmd_buf, "# %d ", ip->lineno);
7674 line_end = quote_string (line_cmd_buf + strlen (line_cmd_buf),
7676 if (file_change != same_file) {
7678 *line_end++ = file_change == enter_file ? '1' : '2';
7680 /* Tell cc1 if following text comes from a system header file. */
7681 if (ip->system_header_p) {
7685 #ifndef NO_IMPLICIT_EXTERN_C
7686 /* Tell cc1plus if following text should be treated as C. */
7687 if (ip->system_header_p == 2 && cplusplus) {
7693 len = line_end - line_cmd_buf;
7694 check_expand (op, len + 1);
7695 if (op->bufp > op->buf && op->bufp[-1] != '\n')
7697 bcopy ((char *) line_cmd_buf, (char *) op->bufp, len);
7699 op->lineno = ip->lineno;
7702 /* This structure represents one parsed argument in a macro call.
7703 `raw' points to the argument text as written (`raw_length' is its length).
7704 `expanded' points to the argument's macro-expansion
7705 (its length is `expand_length').
7706 `stringified_length' is the length the argument would have
7708 `use_count' is the number of times this macro arg is substituted
7709 into the macro. If the actual use count exceeds 10,
7710 the value stored is 10.
7711 `free1' and `free2', if nonzero, point to blocks to be freed
7712 when the macro argument data is no longer needed. */
7715 U_CHAR *raw, *expanded;
7716 int raw_length, expand_length;
7717 int stringified_length;
7718 U_CHAR *free1, *free2;
7724 /* Expand a macro call.
7725 HP points to the symbol that is the macro being called.
7726 Put the result of expansion onto the input stack
7727 so that subsequent input by our caller will use it.
7729 If macro wants arguments, caller has already verified that
7730 an argument list follows; arguments come from the input stack. */
7733 macroexpand (hp, op)
7738 DEFINITION *defn = hp->value.defn;
7739 register U_CHAR *xbuf;
7741 int start_line = instack[indepth].lineno;
7742 int rest_args, rest_zero;
7744 CHECK_DEPTH (return;);
7746 /* it might not actually be a macro. */
7747 if (hp->type != T_MACRO) {
7748 special_symbol (hp, op);
7752 /* This macro is being used inside a #if, which means it must be */
7753 /* recorded as a precondition. */
7754 if (pcp_inside_if && pcp_outfile && defn->predefined)
7755 dump_single_macro (hp, pcp_outfile);
7757 nargs = defn->nargs;
7761 struct argdata *args;
7762 char *parse_error = 0;
7764 args = (struct argdata *) alloca ((nargs + 1) * sizeof (struct argdata));
7766 for (i = 0; i < nargs; i++) {
7767 args[i].raw = (U_CHAR *) "";
7768 args[i].expanded = 0;
7769 args[i].raw_length = args[i].expand_length
7770 = args[i].stringified_length = 0;
7771 args[i].free1 = args[i].free2 = 0;
7772 args[i].use_count = 0;
7775 /* Parse all the macro args that are supplied. I counts them.
7776 The first NARGS args are stored in ARGS.
7777 The rest are discarded.
7778 If rest_args is set then we assume macarg absorbed the rest of the args.
7783 /* Discard the open-parenthesis or comma before the next arg. */
7784 ++instack[indepth].bufp;
7787 if (i < nargs || (nargs == 0 && i == 0)) {
7788 /* if we are working on last arg which absorbs rest of args... */
7789 if (i == nargs - 1 && defn->rest_args)
7791 parse_error = macarg (&args[i], rest_args);
7794 parse_error = macarg (NULL_PTR, 0);
7796 error_with_line (line_for_error (start_line), parse_error);
7800 } while (*instack[indepth].bufp != ')');
7802 /* If we got one arg but it was just whitespace, call that 0 args. */
7804 register U_CHAR *bp = args[0].raw;
7805 register U_CHAR *lim = bp + args[0].raw_length;
7806 /* cpp.texi says for foo ( ) we provide one argument.
7807 However, if foo wants just 0 arguments, treat this as 0. */
7809 while (bp != lim && is_space[*bp]) bp++;
7814 /* Don't output an error message if we have already output one for
7815 a parse error above. */
7817 if (nargs == 0 && i > 0) {
7819 error ("arguments given to macro `%s'", hp->name);
7820 } else if (i < nargs) {
7821 /* traditional C allows foo() if foo wants one argument. */
7822 if (nargs == 1 && i == 0 && traditional)
7824 /* the rest args token is allowed to absorb 0 tokens */
7825 else if (i == nargs - 1 && defn->rest_args)
7827 else if (parse_error)
7830 error ("macro `%s' used without args", hp->name);
7832 error ("macro `%s' used with just one arg", hp->name);
7834 error ("macro `%s' used with only %d args", hp->name, i);
7835 } else if (i > nargs) {
7837 error ("macro `%s' used with too many (%d) args", hp->name, i);
7840 /* Swallow the closeparen. */
7841 ++instack[indepth].bufp;
7843 /* If macro wants zero args, we parsed the arglist for checking only.
7844 Read directly from the macro definition. */
7846 xbuf = defn->expansion;
7847 xbuf_len = defn->length;
7849 register U_CHAR *exp = defn->expansion;
7850 register int offset; /* offset in expansion,
7851 copied a piece at a time */
7852 register int totlen; /* total amount of exp buffer filled so far */
7854 register struct reflist *ap, *last_ap;
7856 /* Macro really takes args. Compute the expansion of this call. */
7858 /* Compute length in characters of the macro's expansion.
7859 Also count number of times each arg is used. */
7860 xbuf_len = defn->length;
7861 for (ap = defn->pattern; ap != NULL; ap = ap->next) {
7863 xbuf_len += args[ap->argno].stringified_length;
7864 else if (ap->raw_before || ap->raw_after || traditional)
7865 /* Add 4 for two newline-space markers to prevent
7866 token concatenation. */
7867 xbuf_len += args[ap->argno].raw_length + 4;
7869 /* We have an ordinary (expanded) occurrence of the arg.
7870 So compute its expansion, if we have not already. */
7871 if (args[ap->argno].expanded == 0) {
7873 obuf = expand_to_temp_buffer (args[ap->argno].raw,
7874 args[ap->argno].raw + args[ap->argno].raw_length,
7877 args[ap->argno].expanded = obuf.buf;
7878 args[ap->argno].expand_length = obuf.length;
7879 args[ap->argno].free2 = obuf.buf;
7882 /* Add 4 for two newline-space markers to prevent
7883 token concatenation. */
7884 xbuf_len += args[ap->argno].expand_length + 4;
7886 if (args[ap->argno].use_count < 10)
7887 args[ap->argno].use_count++;
7890 xbuf = (U_CHAR *) xmalloc (xbuf_len + 1);
7892 /* Generate in XBUF the complete expansion
7893 with arguments substituted in.
7894 TOTLEN is the total size generated so far.
7895 OFFSET is the index in the definition
7896 of where we are copying from. */
7897 offset = totlen = 0;
7898 for (last_ap = NULL, ap = defn->pattern; ap != NULL;
7899 last_ap = ap, ap = ap->next) {
7900 register struct argdata *arg = &args[ap->argno];
7901 int count_before = totlen;
7903 /* Add chars to XBUF. */
7904 for (i = 0; i < ap->nchars; i++, offset++)
7905 xbuf[totlen++] = exp[offset];
7907 /* If followed by an empty rest arg with concatenation,
7908 delete the last run of nonwhite chars. */
7909 if (rest_zero && totlen > count_before
7910 && ((ap->rest_args && ap->raw_before)
7911 || (last_ap != NULL && last_ap->rest_args
7912 && last_ap->raw_after))) {
7913 /* Delete final whitespace. */
7914 while (totlen > count_before && is_space[xbuf[totlen - 1]]) {
7918 /* Delete the nonwhites before them. */
7919 while (totlen > count_before && ! is_space[xbuf[totlen - 1]]) {
7924 if (ap->stringify != 0) {
7925 int arglen = arg->raw_length;
7931 && (c = arg->raw[i], is_space[c]))
7934 && (c = arg->raw[arglen - 1], is_space[c]))
7937 xbuf[totlen++] = '\"'; /* insert beginning quote */
7938 for (; i < arglen; i++) {
7941 /* Special markers Newline Space
7942 generate nothing for a stringified argument. */
7943 if (c == '\n' && arg->raw[i+1] != '\n') {
7948 /* Internal sequences of whitespace are replaced by one space
7949 except within an string or char token. */
7951 && (c == '\n' ? arg->raw[i+1] == '\n' : is_space[c])) {
7953 /* Note that Newline Space does occur within whitespace
7954 sequences; consider it part of the sequence. */
7955 if (c == '\n' && is_space[arg->raw[i+1]])
7957 else if (c != '\n' && is_space[c])
7974 } else if (c == '\"' || c == '\'')
7978 /* Escape these chars */
7979 if (c == '\"' || (in_string && c == '\\'))
7980 xbuf[totlen++] = '\\';
7984 sprintf ((char *) &xbuf[totlen], "\\%03o", (unsigned int) c);
7989 xbuf[totlen++] = '\"'; /* insert ending quote */
7990 } else if (ap->raw_before || ap->raw_after || traditional) {
7991 U_CHAR *p1 = arg->raw;
7992 U_CHAR *l1 = p1 + arg->raw_length;
7993 if (ap->raw_before) {
7994 while (p1 != l1 && is_space[*p1]) p1++;
7995 while (p1 != l1 && is_idchar[*p1])
7996 xbuf[totlen++] = *p1++;
7997 /* Delete any no-reexpansion marker that follows
7998 an identifier at the beginning of the argument
7999 if the argument is concatenated with what precedes it. */
8000 if (p1[0] == '\n' && p1[1] == '-')
8002 } else if (!traditional) {
8003 /* Ordinary expanded use of the argument.
8004 Put in newline-space markers to prevent token pasting. */
8005 xbuf[totlen++] = '\n';
8006 xbuf[totlen++] = ' ';
8008 if (ap->raw_after) {
8009 /* Arg is concatenated after: delete trailing whitespace,
8010 whitespace markers, and no-reexpansion markers. */
8012 if (is_space[l1[-1]]) l1--;
8013 else if (l1[-1] == '-') {
8014 U_CHAR *p2 = l1 - 1;
8015 /* If a `-' is preceded by an odd number of newlines then it
8016 and the last newline are a no-reexpansion marker. */
8017 while (p2 != p1 && p2[-1] == '\n') p2--;
8018 if ((l1 - 1 - p2) & 1) {
8027 bcopy ((char *) p1, (char *) (xbuf + totlen), l1 - p1);
8029 if (!traditional && !ap->raw_after) {
8030 /* Ordinary expanded use of the argument.
8031 Put in newline-space markers to prevent token pasting. */
8032 xbuf[totlen++] = '\n';
8033 xbuf[totlen++] = ' ';
8036 /* Ordinary expanded use of the argument.
8037 Put in newline-space markers to prevent token pasting. */
8039 xbuf[totlen++] = '\n';
8040 xbuf[totlen++] = ' ';
8042 bcopy ((char *) arg->expanded, (char *) (xbuf + totlen),
8043 arg->expand_length);
8044 totlen += arg->expand_length;
8046 xbuf[totlen++] = '\n';
8047 xbuf[totlen++] = ' ';
8049 /* If a macro argument with newlines is used multiple times,
8050 then only expand the newlines once. This avoids creating output
8051 lines which don't correspond to any input line, which confuses
8053 if (arg->use_count > 1 && arg->newlines > 0) {
8054 /* Don't bother doing change_newlines for subsequent
8058 = change_newlines (arg->expanded, arg->expand_length);
8062 if (totlen > xbuf_len)
8066 /* if there is anything left of the definition
8067 after handling the arg list, copy that in too. */
8069 for (i = offset; i < defn->length; i++) {
8070 /* if we've reached the end of the macro */
8073 if (! (rest_zero && last_ap != NULL && last_ap->rest_args
8074 && last_ap->raw_after))
8075 xbuf[totlen++] = exp[i];
8081 for (i = 0; i < nargs; i++) {
8082 if (args[i].free1 != 0)
8083 free (args[i].free1);
8084 if (args[i].free2 != 0)
8085 free (args[i].free2);
8089 xbuf = defn->expansion;
8090 xbuf_len = defn->length;
8093 /* Now put the expansion on the input stack
8094 so our caller will commence reading from it. */
8096 register FILE_BUF *ip2;
8098 ip2 = &instack[++indepth];
8101 ip2->nominal_fname = 0;
8102 /* This may not be exactly correct, but will give much better error
8103 messages for nested macro calls than using a line number of zero. */
8104 ip2->lineno = start_line;
8106 ip2->length = xbuf_len;
8108 ip2->free_ptr = (nargs > 0) ? xbuf : 0;
8110 ip2->if_stack = if_stack;
8111 ip2->system_header_p = 0;
8113 /* Recursive macro use sometimes works traditionally.
8114 #define foo(x,y) bar (x (y,0), y)
8118 hp->type = T_DISABLED;
8123 * Parse a macro argument and store the info on it into *ARGPTR.
8124 * REST_ARGS is passed to macarg1 to make it absorb the rest of the args.
8125 * Return nonzero to indicate a syntax error.
8129 macarg (argptr, rest_args)
8130 register struct argdata *argptr;
8133 FILE_BUF *ip = &instack[indepth];
8138 /* Try to parse as much of the argument as exists at this
8139 input stack level. */
8140 U_CHAR *bp = macarg1 (ip->bufp, ip->buf + ip->length,
8141 &paren, &newlines, &comments, rest_args);
8143 /* If we find the end of the argument at this level,
8144 set up *ARGPTR to point at it in the input stack. */
8145 if (!(ip->fname != 0 && (newlines != 0 || comments != 0))
8146 && bp != ip->buf + ip->length) {
8148 argptr->raw = ip->bufp;
8149 argptr->raw_length = bp - ip->bufp;
8150 argptr->newlines = newlines;
8154 /* This input stack level ends before the macro argument does.
8155 We must pop levels and keep parsing.
8156 Therefore, we must allocate a temporary buffer and copy
8157 the macro argument into it. */
8158 int bufsize = bp - ip->bufp;
8159 int extra = newlines;
8160 U_CHAR *buffer = (U_CHAR *) xmalloc (bufsize + extra + 1);
8161 int final_start = 0;
8163 bcopy ((char *) ip->bufp, (char *) buffer, bufsize);
8165 ip->lineno += newlines;
8167 while (bp == ip->buf + ip->length) {
8168 if (instack[indepth].macro == 0) {
8170 return "unterminated macro call";
8172 ip->macro->type = T_MACRO;
8174 free (ip->free_ptr);
8175 ip = &instack[--indepth];
8178 bp = macarg1 (ip->bufp, ip->buf + ip->length, &paren,
8179 &newlines, &comments, rest_args);
8180 final_start = bufsize;
8181 bufsize += bp - ip->bufp;
8183 buffer = (U_CHAR *) xrealloc (buffer, bufsize + extra + 1);
8184 bcopy ((char *) ip->bufp, (char *) (buffer + bufsize - (bp - ip->bufp)),
8187 ip->lineno += newlines;
8190 /* Now, if arg is actually wanted, record its raw form,
8191 discarding comments and duplicating newlines in whatever
8192 part of it did not come from a macro expansion.
8193 EXTRA space has been preallocated for duplicating the newlines.
8194 FINAL_START is the index of the start of that part. */
8196 argptr->raw = buffer;
8197 argptr->raw_length = bufsize;
8198 argptr->free1 = buffer;
8199 argptr->newlines = newlines;
8200 argptr->comments = comments;
8201 if ((newlines || comments) && ip->fname != 0)
8204 discard_comments (argptr->raw + final_start,
8205 argptr->raw_length - final_start,
8207 argptr->raw[argptr->raw_length] = 0;
8208 if (argptr->raw_length > bufsize + extra)
8213 /* If we are not discarding this argument,
8214 macroexpand it and compute its length as stringified.
8215 All this info goes into *ARGPTR. */
8218 register U_CHAR *buf, *lim;
8219 register int totlen;
8222 lim = buf + argptr->raw_length;
8224 while (buf != lim && is_space[*buf])
8226 while (buf != lim && is_space[lim[-1]])
8228 totlen = traditional ? 0 : 2; /* Count opening and closing quote. */
8229 while (buf != lim) {
8230 register U_CHAR c = *buf++;
8232 /* Internal sequences of whitespace are replaced by one space
8233 in most cases, but not always. So count all the whitespace
8234 in case we need to keep it all. */
8237 SKIP_ALL_WHITE_SPACE (buf);
8240 if (c == '\"' || c == '\\') /* escape these chars */
8242 else if (!isprint (c))
8245 argptr->stringified_length = totlen;
8250 /* Scan text from START (inclusive) up to LIMIT (exclusive),
8251 counting parens in *DEPTHPTR,
8252 and return if reach LIMIT
8253 or before a `)' that would make *DEPTHPTR negative
8254 or before a comma when *DEPTHPTR is zero.
8255 Single and double quotes are matched and termination
8256 is inhibited within them. Comments also inhibit it.
8257 Value returned is pointer to stopping place.
8259 Increment *NEWLINES each time a newline is passed.
8260 REST_ARGS notifies macarg1 that it should absorb the rest of the args.
8261 Set *COMMENTS to 1 if a comment is seen. */
8264 macarg1 (start, limit, depthptr, newlines, comments, rest_args)
8266 register U_CHAR *limit;
8267 int *depthptr, *newlines, *comments;
8270 register U_CHAR *bp = start;
8272 while (bp < limit) {
8278 if (--(*depthptr) < 0)
8282 /* Traditionally, backslash makes following char not special. */
8283 if (bp + 1 < limit && traditional)
8286 /* But count source lines anyway. */
8295 if (bp[1] == '\\' && bp[2] == '\n')
8296 newline_fix (bp + 1);
8297 if (cplusplus_comments && bp[1] == '/') {
8300 while (bp < limit && (*bp != '\n' || bp[-1] == '\\')) {
8301 if (*bp == '\n') ++*newlines;
8306 if (bp[1] != '*' || bp + 1 >= limit)
8310 while (bp + 1 < limit) {
8312 && bp[1] == '\\' && bp[2] == '\n')
8313 newline_fix (bp + 1);
8314 if (bp[0] == '*' && bp[1] == '/')
8316 if (*bp == '\n') ++*newlines;
8324 for (quotec = *bp++; bp + 1 < limit && *bp != quotec; bp++) {
8329 while (*bp == '\\' && bp[1] == '\n') {
8332 } else if (*bp == '\n') {
8341 /* if we've returned to lowest level and we aren't absorbing all args */
8342 if ((*depthptr) == 0 && rest_args == 0)
8352 /* Discard comments and duplicate newlines
8353 in the string of length LENGTH at START,
8354 except inside of string constants.
8355 The string is copied into itself with its beginning staying fixed.
8357 NEWLINES is the number of newlines that must be duplicated.
8358 We assume that that much extra space is available past the end
8362 discard_comments (start, length, newlines)
8367 register U_CHAR *ibp;
8368 register U_CHAR *obp;
8369 register U_CHAR *limit;
8372 /* If we have newlines to duplicate, copy everything
8373 that many characters up. Then, in the second part,
8374 we will have room to insert the newlines
8376 NEWLINES may actually be too large, because it counts
8377 newlines in string constants, and we don't duplicate those.
8378 But that does no harm. */
8380 ibp = start + length;
8381 obp = ibp + newlines;
8383 while (limit != ibp)
8387 ibp = start + newlines;
8388 limit = start + length + newlines;
8391 while (ibp < limit) {
8392 *obp++ = c = *ibp++;
8395 /* Duplicate the newline. */
8407 if (*ibp == '\\' && ibp[1] == '\n')
8409 /* Delete any comment. */
8410 if (cplusplus_comments && ibp[0] == '/') {
8411 /* Comments are equivalent to spaces. */
8414 while (ibp < limit && (*ibp != '\n' || ibp[-1] == '\\'))
8418 if (ibp[0] != '*' || ibp + 1 >= limit)
8420 /* Comments are equivalent to spaces. */
8423 while (ibp + 1 < limit) {
8425 && ibp[1] == '\\' && ibp[2] == '\n')
8426 newline_fix (ibp + 1);
8427 if (ibp[0] == '*' && ibp[1] == '/')
8436 /* Notice and skip strings, so that we don't
8437 think that comments start inside them,
8438 and so we don't duplicate newlines in them. */
8441 while (ibp < limit) {
8442 *obp++ = c = *ibp++;
8445 if (c == '\n' && quotec == '\'')
8447 if (c == '\\' && ibp < limit) {
8448 while (*ibp == '\\' && ibp[1] == '\n')
8461 /* Turn newlines to spaces in the string of length LENGTH at START,
8462 except inside of string constants.
8463 The string is copied into itself with its beginning staying fixed. */
8466 change_newlines (start, length)
8470 register U_CHAR *ibp;
8471 register U_CHAR *obp;
8472 register U_CHAR *limit;
8476 limit = start + length;
8479 while (ibp < limit) {
8480 *obp++ = c = *ibp++;
8483 /* If this is a NEWLINE NEWLINE, then this is a real newline in the
8484 string. Skip past the newline and its duplicate.
8485 Put a space in the output. */
8496 /* Notice and skip strings, so that we don't delete newlines in them. */
8499 while (ibp < limit) {
8500 *obp++ = c = *ibp++;
8503 if (c == '\n' && quotec == '\'')
8515 * my_strerror - return the descriptive text associated with an `errno' code.
8519 my_strerror (errnum)
8525 #ifndef HAVE_STRERROR
8526 result = (char *) ((errnum < sys_nerr) ? sys_errlist[errnum] : 0);
8528 result = strerror (errnum);
8531 /* VAXCRTL's strerror() takes an optional second argument, which only
8532 matters when the first argument is EVMSERR. However, it's simplest
8533 just to pass it unconditionally. `vaxc$errno' is declared in
8534 <errno.h>, and maintained by the library in parallel with `errno'.
8535 We assume that caller's `errnum' either matches the last setting of
8536 `errno' by the library or else does not have the value `EVMSERR'. */
8538 result = strerror (errnum, vaxc$errno);
8542 result = "undocumented I/O error";
8548 * error - print error message and increment count of errors.
8552 error (msg, arg1, arg2, arg3)
8554 char *arg1, *arg2, *arg3;
8557 FILE_BUF *ip = NULL;
8559 print_containing_files ();
8561 for (i = indepth; i >= 0; i--)
8562 if (instack[i].fname != NULL) {
8568 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8569 fprintf (stderr, msg, arg1, arg2, arg3);
8570 fprintf (stderr, "\n");
8574 /* Error including a message from `errno'. */
8577 error_from_errno (name)
8581 FILE_BUF *ip = NULL;
8583 print_containing_files ();
8585 for (i = indepth; i >= 0; i--)
8586 if (instack[i].fname != NULL) {
8592 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8594 fprintf (stderr, "%s: %s\n", name, my_strerror (errno));
8599 /* Print error message but don't count it. */
8602 warning (msg, arg1, arg2, arg3)
8604 char *arg1, *arg2, *arg3;
8607 FILE_BUF *ip = NULL;
8609 if (inhibit_warnings)
8612 if (warnings_are_errors)
8615 print_containing_files ();
8617 for (i = indepth; i >= 0; i--)
8618 if (instack[i].fname != NULL) {
8624 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8625 fprintf (stderr, "warning: ");
8626 fprintf (stderr, msg, arg1, arg2, arg3);
8627 fprintf (stderr, "\n");
8631 error_with_line (line, msg, arg1, arg2, arg3)
8634 char *arg1, *arg2, *arg3;
8637 FILE_BUF *ip = NULL;
8639 print_containing_files ();
8641 for (i = indepth; i >= 0; i--)
8642 if (instack[i].fname != NULL) {
8648 fprintf (stderr, "%s:%d: ", ip->nominal_fname, line);
8649 fprintf (stderr, msg, arg1, arg2, arg3);
8650 fprintf (stderr, "\n");
8655 warning_with_line (line, msg, arg1, arg2, arg3)
8658 char *arg1, *arg2, *arg3;
8661 FILE_BUF *ip = NULL;
8663 if (inhibit_warnings)
8666 if (warnings_are_errors)
8669 print_containing_files ();
8671 for (i = indepth; i >= 0; i--)
8672 if (instack[i].fname != NULL) {
8678 fprintf (stderr, "%s:%d: ", ip->nominal_fname, line);
8679 fprintf (stderr, "warning: ");
8680 fprintf (stderr, msg, arg1, arg2, arg3);
8681 fprintf (stderr, "\n");
8684 /* print an error message and maybe count it. */
8687 pedwarn (msg, arg1, arg2, arg3)
8689 char *arg1, *arg2, *arg3;
8691 if (pedantic_errors)
8692 error (msg, arg1, arg2, arg3);
8694 warning (msg, arg1, arg2, arg3);
8698 pedwarn_with_line (line, msg, arg1, arg2, arg3)
8701 char *arg1, *arg2, *arg3;
8703 if (pedantic_errors)
8704 error_with_line (line, msg, arg1, arg2, arg3);
8706 warning_with_line (line, msg, arg1, arg2, arg3);
8709 /* Report a warning (or an error if pedantic_errors)
8710 giving specified file name and line number, not current. */
8713 pedwarn_with_file_and_line (file, line, msg, arg1, arg2, arg3)
8717 char *arg1, *arg2, *arg3;
8719 if (!pedantic_errors && inhibit_warnings)
8722 fprintf (stderr, "%s:%d: ", file, line);
8723 if (pedantic_errors)
8725 if (!pedantic_errors)
8726 fprintf (stderr, "warning: ");
8727 fprintf (stderr, msg, arg1, arg2, arg3);
8728 fprintf (stderr, "\n");
8731 /* Print the file names and line numbers of the #include
8732 commands which led to the current file. */
8735 print_containing_files ()
8737 FILE_BUF *ip = NULL;
8741 /* If stack of files hasn't changed since we last printed
8742 this info, don't repeat it. */
8743 if (last_error_tick == input_file_stack_tick)
8746 for (i = indepth; i >= 0; i--)
8747 if (instack[i].fname != NULL) {
8752 /* Give up if we don't find a source file. */
8756 /* Find the other, outer source files. */
8757 for (i--; i >= 0; i--)
8758 if (instack[i].fname != NULL) {
8762 fprintf (stderr, "In file included");
8764 fprintf (stderr, ",\n ");
8767 fprintf (stderr, " from %s:%d", ip->nominal_fname, ip->lineno);
8770 fprintf (stderr, ":\n");
8772 /* Record we have printed the status as of this time. */
8773 last_error_tick = input_file_stack_tick;
8776 /* Return the line at which an error occurred.
8777 The error is not necessarily associated with the current spot
8778 in the input stack, so LINE says where. LINE will have been
8779 copied from ip->lineno for the current input level.
8780 If the current level is for a file, we return LINE.
8781 But if the current level is not for a file, LINE is meaningless.
8782 In that case, we return the lineno of the innermost file. */
8785 line_for_error (line)
8791 for (i = indepth; i >= 0; ) {
8792 if (instack[i].fname != 0)
8797 line1 = instack[i].lineno;
8805 * If OBUF doesn't have NEEDED bytes after OPTR, make it bigger.
8807 * As things stand, nothing is ever placed in the output buffer to be
8808 * removed again except when it's KNOWN to be part of an identifier,
8809 * so flushing and moving down everything left, instead of expanding,
8813 /* You might think void was cleaner for the return type,
8814 but that would get type mismatch in check_expand in strict ANSI. */
8816 grow_outbuf (obuf, needed)
8817 register FILE_BUF *obuf;
8818 register int needed;
8823 if (obuf->length - (obuf->bufp - obuf->buf) > needed)
8826 /* Make it at least twice as big as it is now. */
8828 /* Make it have at least 150% of the free space we will need. */
8829 minsize = (3 * needed) / 2 + (obuf->bufp - obuf->buf);
8830 if (minsize > obuf->length)
8831 obuf->length = minsize;
8833 if ((p = (U_CHAR *) xrealloc (obuf->buf, obuf->length)) == NULL)
8836 obuf->bufp = p + (obuf->bufp - obuf->buf);
8842 /* Symbol table for macro names and special symbols */
8845 * install a name in the main hash table, even if it is already there.
8846 * name stops with first non alphanumeric, except leading '#'.
8847 * caller must check against redefinition if that is desired.
8848 * delete_macro () removes things installed by install () in fifo order.
8849 * this is important because of the `defined' special symbol used
8850 * in #if, and also if pushdef/popdef directives are ever implemented.
8852 * If LEN is >= 0, it is the length of the name.
8853 * Otherwise, compute the length by scanning the entire name.
8855 * If HASH is >= 0, it is the precomputed hash code.
8856 * Otherwise, compute the hash code.
8859 install (name, len, type, ivalue, value, hash)
8862 enum node_type type;
8867 register HASHNODE *hp;
8868 register int i, bucket;
8869 register U_CHAR *p, *q;
8873 while (is_idchar[*p])
8879 hash = hashf (name, len, HASHSIZE);
8881 i = sizeof (HASHNODE) + len + 1;
8882 hp = (HASHNODE *) xmalloc (i);
8884 hp->bucket_hdr = &hashtab[bucket];
8885 hp->next = hashtab[bucket];
8886 hashtab[bucket] = hp;
8888 if (hp->next != NULL)
8889 hp->next->prev = hp;
8892 if (hp->type == T_CONST)
8893 hp->value.ival = ivalue;
8895 hp->value.cpval = value;
8896 hp->name = ((U_CHAR *) hp) + sizeof (HASHNODE);
8899 for (i = 0; i < len; i++)
8906 * find the most recent hash node for name name (ending with first
8907 * non-identifier char) installed by install
8909 * If LEN is >= 0, it is the length of the name.
8910 * Otherwise, compute the length by scanning the entire name.
8912 * If HASH is >= 0, it is the precomputed hash code.
8913 * Otherwise, compute the hash code.
8916 lookup (name, len, hash)
8921 register U_CHAR *bp;
8922 register HASHNODE *bucket;
8925 for (bp = name; is_idchar[*bp]; bp++) ;
8930 hash = hashf (name, len, HASHSIZE);
8932 bucket = hashtab[hash];
8934 if (bucket->length == len && strncmp (bucket->name, name, len) == 0)
8936 bucket = bucket->next;
8942 * Delete a hash node. Some weirdness to free junk from macros.
8943 * More such weirdness will have to be added if you define more hash
8944 * types that need it.
8947 /* Note that the DEFINITION of a macro is removed from the hash table
8948 but its storage is not freed. This would be a storage leak
8949 except that it is not reasonable to keep undefining and redefining
8950 large numbers of macros many times.
8951 In any case, this is necessary, because a macro can be #undef'd
8952 in the middle of reading the arguments to a call to it.
8953 If #undef freed the DEFINITION, that would crash. */
8960 if (hp->prev != NULL)
8961 hp->prev->next = hp->next;
8962 if (hp->next != NULL)
8963 hp->next->prev = hp->prev;
8965 /* make sure that the bucket chain header that
8966 the deleted guy was on points to the right thing afterwards. */
8967 if (hp == *hp->bucket_hdr)
8968 *hp->bucket_hdr = hp->next;
8971 if (hp->type == T_MACRO) {
8972 DEFINITION *d = hp->value.defn;
8973 struct reflist *ap, *nextap;
8975 for (ap = d->pattern; ap != NULL; ap = nextap) {
8986 * return hash function on name. must be compatible with the one
8987 * computed a step at a time, elsewhere
8990 hashf (name, len, hashsize)
8991 register U_CHAR *name;
8998 r = HASHSTEP (r, *name++);
9000 return MAKE_POS (r) % hashsize;
9004 /* Dump the definition of a single macro HP to OF. */
9006 dump_single_macro (hp, of)
9007 register HASHNODE *hp;
9010 register DEFINITION *defn = hp->value.defn;
9016 /* Print the definition of the macro HP. */
9018 fprintf (of, "#define %s", hp->name);
9020 if (defn->nargs >= 0) {
9024 for (i = 0; i < defn->nargs; i++) {
9025 dump_arg_n (defn, i, of);
9026 if (i + 1 < defn->nargs)
9036 for (ap = defn->pattern; ap != NULL; ap = ap->next) {
9037 dump_defn_1 (defn->expansion, offset, ap->nchars, of);
9038 if (ap->nchars != 0)
9040 offset += ap->nchars;
9043 if (ap->raw_before && !concat)
9044 fprintf (of, " ## ");
9046 dump_arg_n (defn, ap->argno, of);
9047 if (ap->raw_after) {
9048 fprintf (of, " ## ");
9052 dump_defn_1 (defn->expansion, offset, defn->length - offset, of);
9056 /* Dump all macro definitions as #defines to stdout. */
9063 for (bucket = 0; bucket < HASHSIZE; bucket++) {
9064 register HASHNODE *hp;
9066 for (hp = hashtab[bucket]; hp; hp= hp->next) {
9067 if (hp->type == T_MACRO)
9068 dump_single_macro (hp, stdout);
9073 /* Output to OF a substring of a macro definition.
9074 BASE is the beginning of the definition.
9075 Output characters START thru LENGTH.
9076 Discard newlines outside of strings, thus
9077 converting funny-space markers to ordinary spaces. */
9080 dump_defn_1 (base, start, length, of)
9086 U_CHAR *p = base + start;
9087 U_CHAR *limit = base + start + length;
9090 if (*p == '\"' || *p =='\'') {
9091 U_CHAR *p1 = skip_quoted_string (p, limit, 0, NULL_PTR,
9092 NULL_PTR, NULL_PTR);
9093 fwrite (p, p1 - p, 1, of);
9103 /* Print the name of argument number ARGNUM of macro definition DEFN
9105 Recall that DEFN->args.argnames contains all the arg names
9106 concatenated in reverse order with comma-space in between. */
9109 dump_arg_n (defn, argnum, of)
9114 register U_CHAR *p = defn->args.argnames;
9115 while (argnum + 1 < defn->nargs) {
9116 p = (U_CHAR *) index (p, ' ') + 1;
9120 while (*p && *p != ',') {
9126 /* Initialize syntactic classifications of characters. */
9129 initialize_char_syntax ()
9134 * Set up is_idchar and is_idstart tables. These should be
9135 * faster than saying (is_alpha (c) || c == '_'), etc.
9136 * Set up these things before calling any routines tthat
9139 for (i = 'a'; i <= 'z'; i++) {
9140 is_idchar[i - 'a' + 'A'] = 1;
9142 is_idstart[i - 'a' + 'A'] = 1;
9145 for (i = '0'; i <= '9'; i++)
9148 is_idstart['_'] = 1;
9149 is_idchar['$'] = dollars_in_ident;
9150 is_idstart['$'] = dollars_in_ident;
9152 /* horizontal space table */
9153 is_hor_space[' '] = 1;
9154 is_hor_space['\t'] = 1;
9155 is_hor_space['\v'] = 1;
9156 is_hor_space['\f'] = 1;
9157 is_hor_space['\r'] = 1;
9167 /* Initialize the built-in macros. */
9170 initialize_builtins (inp, outp)
9174 install ("__LINE__", -1, T_SPECLINE, 0, 0, -1);
9175 install ("__DATE__", -1, T_DATE, 0, 0, -1);
9176 install ("__FILE__", -1, T_FILE, 0, 0, -1);
9177 install ("__BASE_FILE__", -1, T_BASE_FILE, 0, 0, -1);
9178 install ("__INCLUDE_LEVEL__", -1, T_INCLUDE_LEVEL, 0, 0, -1);
9179 install ("__VERSION__", -1, T_VERSION, 0, 0, -1);
9180 #ifndef NO_BUILTIN_SIZE_TYPE
9181 install ("__SIZE_TYPE__", -1, T_SIZE_TYPE, 0, 0, -1);
9183 #ifndef NO_BUILTIN_PTRDIFF_TYPE
9184 install ("__PTRDIFF_TYPE__ ", -1, T_PTRDIFF_TYPE, 0, 0, -1);
9186 install ("__WCHAR_TYPE__", -1, T_WCHAR_TYPE, 0, 0, -1);
9187 install ("__USER_LABEL_PREFIX__", -1, T_USER_LABEL_PREFIX_TYPE, 0, 0, -1);
9188 install ("__REGISTER_PREFIX__", -1, T_REGISTER_PREFIX_TYPE, 0, 0, -1);
9189 install ("__TIME__", -1, T_TIME, 0, 0, -1);
9191 install ("__STDC__", -1, T_CONST, STDC_VALUE, 0, -1);
9193 install ("__OBJC__", -1, T_CONST, 1, 0, -1);
9194 /* This is supplied using a -D by the compiler driver
9195 so that it is present only when truly compiling with GNU C. */
9196 /* install ("__GNUC__", -1, T_CONST, 2, 0, -1); */
9200 char directive[2048];
9201 register struct directive *dp = &directive_table[0];
9202 struct tm *timebuf = timestamp ();
9204 sprintf (directive, " __BASE_FILE__ \"%s\"\n",
9205 instack[0].nominal_fname);
9206 output_line_command (inp, outp, 0, same_file);
9207 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9209 sprintf (directive, " __VERSION__ \"%s\"\n", version_string);
9210 output_line_command (inp, outp, 0, same_file);
9211 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9213 #ifndef NO_BUILTIN_SIZE_TYPE
9214 sprintf (directive, " __SIZE_TYPE__ %s\n", SIZE_TYPE);
9215 output_line_command (inp, outp, 0, same_file);
9216 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9219 #ifndef NO_BUILTIN_PTRDIFF_TYPE
9220 sprintf (directive, " __PTRDIFF_TYPE__ %s\n", PTRDIFF_TYPE);
9221 output_line_command (inp, outp, 0, same_file);
9222 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9225 sprintf (directive, " __WCHAR_TYPE__ %s\n", wchar_type);
9226 output_line_command (inp, outp, 0, same_file);
9227 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9229 sprintf (directive, " __DATE__ \"%s %2d %4d\"\n",
9230 monthnames[timebuf->tm_mon],
9231 timebuf->tm_mday, timebuf->tm_year + 1900);
9232 output_line_command (inp, outp, 0, same_file);
9233 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9235 sprintf (directive, " __TIME__ \"%02d:%02d:%02d\"\n",
9236 timebuf->tm_hour, timebuf->tm_min, timebuf->tm_sec);
9237 output_line_command (inp, outp, 0, same_file);
9238 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9242 sprintf (directive, " __STDC__ 1");
9243 output_line_command (inp, outp, 0, same_file);
9244 pass_thru_directive (directive, &directive[strlen (directive)],
9249 sprintf (directive, " __OBJC__ 1");
9250 output_line_command (inp, outp, 0, same_file);
9251 pass_thru_directive (directive, &directive[strlen (directive)],
9258 * process a given definition string, for initialization
9259 * If STR is just an identifier, define it with value 1.
9260 * If STR has anything after the identifier, then it should
9261 * be identifier=definition.
9265 make_definition (str, op)
9270 struct directive *kt;
9275 if (!is_idstart[*p]) {
9276 error ("malformed option `-D %s'", str);
9279 while (is_idchar[*++p])
9282 buf = (U_CHAR *) alloca (p - buf + 4);
9283 strcpy ((char *)buf, str);
9284 strcat ((char *)buf, " 1");
9285 } else if (*p != '=') {
9286 error ("malformed option `-D %s'", str);
9290 /* Copy the entire option so we can modify it. */
9291 buf = (U_CHAR *) alloca (2 * strlen (str) + 1);
9292 strncpy (buf, str, p - str);
9293 /* Change the = to a space. */
9295 /* Scan for any backslash-newline and remove it. */
9299 if (*p == '\"' || *p == '\'') {
9300 int unterminated = 0;
9301 U_CHAR *p1 = skip_quoted_string (p, p + strlen (p), 0,
9302 NULL_PTR, NULL_PTR, &unterminated);
9306 if (*p == '\\' && p[1] == '\n')
9310 } else if (*p == '\\' && p[1] == '\n')
9312 /* Change newline chars into newline-markers. */
9313 else if (*p == '\n')
9325 ip = &instack[++indepth];
9326 ip->nominal_fname = ip->fname = "*Initialization*";
9328 ip->buf = ip->bufp = buf;
9329 ip->length = strlen (buf);
9333 ip->if_stack = if_stack;
9334 ip->system_header_p = 0;
9336 for (kt = directive_table; kt->type != T_DEFINE; kt++)
9339 /* Pass NULL instead of OP, since this is a "predefined" macro. */
9340 do_define (buf, buf + strlen (buf), NULL, kt);
9344 /* JF, this does the work for the -U option */
9347 make_undef (str, op)
9352 struct directive *kt;
9354 ip = &instack[++indepth];
9355 ip->nominal_fname = ip->fname = "*undef*";
9357 ip->buf = ip->bufp = str;
9358 ip->length = strlen (str);
9362 ip->if_stack = if_stack;
9363 ip->system_header_p = 0;
9365 for (kt = directive_table; kt->type != T_UNDEF; kt++)
9368 do_undef (str, str + strlen (str), op, kt);
9372 /* Process the string STR as if it appeared as the body of a #assert.
9373 OPTION is the option name for which STR was the argument. */
9376 make_assertion (option, str)
9381 struct directive *kt;
9382 U_CHAR *buf, *p, *q;
9384 /* Copy the entire option so we can modify it. */
9385 buf = (U_CHAR *) alloca (strlen (str) + 1);
9386 strcpy ((char *) buf, str);
9387 /* Scan for any backslash-newline and remove it. */
9390 if (*p == '\\' && p[1] == '\n')
9398 if (!is_idstart[*p]) {
9399 error ("malformed option `%s %s'", option, str);
9402 while (is_idchar[*++p])
9404 while (*p == ' ' || *p == '\t') p++;
9405 if (! (*p == 0 || *p == '(')) {
9406 error ("malformed option `%s %s'", option, str);
9410 ip = &instack[++indepth];
9411 ip->nominal_fname = ip->fname = "*Initialization*";
9413 ip->buf = ip->bufp = buf;
9414 ip->length = strlen (buf);
9418 ip->if_stack = if_stack;
9419 ip->system_header_p = 0;
9421 for (kt = directive_table; kt->type != T_ASSERT; kt++)
9424 /* pass NULL as output ptr to do_define since we KNOW it never
9425 does any output.... */
9426 do_assert (buf, buf + strlen (buf) , NULL_PTR, kt);
9430 /* Append a chain of `struct file_name_list's
9431 to the end of the main include chain.
9432 FIRST is the beginning of the chain to append, and LAST is the end. */
9435 append_include_chain (first, last)
9436 struct file_name_list *first, *last;
9438 struct file_name_list *dir;
9440 if (!first || !last)
9446 last_include->next = first;
9448 if (first_bracket_include == 0)
9449 first_bracket_include = first;
9451 for (dir = first; ; dir = dir->next) {
9452 int len = strlen (dir->fname) + INCLUDE_LEN_FUDGE;
9453 if (len > max_include_len)
9454 max_include_len = len;
9460 last_include = last;
9463 /* Add output to `deps_buffer' for the -M switch.
9464 STRING points to the text to be output.
9465 SPACER is ':' for targets, ' ' for dependencies, zero for text
9466 to be inserted literally. */
9469 deps_output (string, spacer)
9473 int size = strlen (string);
9478 #ifndef MAX_OUTPUT_COLUMNS
9479 #define MAX_OUTPUT_COLUMNS 72
9483 && (deps_column + size) > MAX_OUTPUT_COLUMNS)
9485 deps_output (" \\\n ", 0);
9489 if (deps_size + size + 8 > deps_allocated_size) {
9490 deps_allocated_size = (deps_size + size + 50) * 2;
9491 deps_buffer = (char *) xrealloc (deps_buffer, deps_allocated_size);
9493 if (spacer == ' ' && deps_column > 0)
9494 deps_buffer[deps_size++] = ' ';
9495 bcopy (string, &deps_buffer[deps_size], size);
9497 deps_column += size;
9499 deps_buffer[deps_size++] = ':';
9500 deps_buffer[deps_size] = 0;
9503 #if defined(USG) || defined(VMS)
9509 register unsigned length;
9511 while (length-- > 0)
9516 bcopy (b1, b2, length)
9519 register unsigned length;
9521 while (length-- > 0)
9526 bcmp (b1, b2, length) /* This could be a macro! */
9529 register unsigned length;
9531 while (length-- > 0)
9537 #endif /* not BSTRING */
9538 #endif /* USG or VMS */
9545 fprintf (stderr, "%s: ", progname);
9546 fprintf (stderr, str, arg);
9547 fprintf (stderr, "\n");
9548 exit (FAILURE_EXIT_CODE);
9551 /* More 'friendly' abort that prints the line and file.
9552 config.h can #define abort fancy_abort if you like that sort of thing. */
9557 fatal ("Internal gcc abort.");
9561 perror_with_name (name)
9564 fprintf (stderr, "%s: ", progname);
9565 fprintf (stderr, "%s: %s\n", name, my_strerror (errno));
9570 pfatal_with_name (name)
9573 perror_with_name (name);
9577 exit (FAILURE_EXIT_CODE);
9581 /* Handler for SIGPIPE. */
9585 /* If this is missing, some compilers complain. */
9588 fatal ("output pipe has been closed");
9594 fatal ("Memory exhausted.");
9602 register char *ptr = (char *) malloc (size);
9603 if (ptr != 0) return (ptr);
9610 xrealloc (old, size)
9614 register char *ptr = (char *) realloc (old, size);
9615 if (ptr != 0) return (ptr);
9622 xcalloc (number, size)
9623 unsigned number, size;
9625 register unsigned total = number * size;
9626 register char *ptr = (char *) malloc (total);
9631 /* It's not too long, so loop, zeroing by longs.
9632 It must be safe because malloc values are always well aligned. */
9633 register long *zp = (long *) ptr;
9634 register long *zl = (long *) (ptr + total - 4);
9635 register int i = total - 4;
9654 unsigned size = strlen (input);
9655 char *output = xmalloc (size + 1);
9656 strcpy (output, input);
9660 /* Get the file-mode and data size of the file open on FD
9661 and store them in *MODE_POINTER and *SIZE_POINTER. */
9664 file_size_and_mode (fd, mode_pointer, size_pointer)
9667 long int *size_pointer;
9671 if (fstat (fd, &sbuf) < 0) return (-1);
9672 if (mode_pointer) *mode_pointer = sbuf.st_mode;
9673 if (size_pointer) *size_pointer = sbuf.st_size;
9678 output_dots (fd, depth)
9691 /* Under VMS we need to fix up the "include" specification
9692 filename so that everything following the 1st slash is
9693 changed into its correct VMS file specification. */
9696 hack_vms_include_specification (fname)
9699 register char *cp, *cp1, *cp2;
9700 int f, check_filename_before_returning, no_prefix_seen;
9703 check_filename_before_returning = 0;
9706 /* Ignore leading "./"s */
9707 while (fname[0] == '.' && fname[1] == '/') {
9708 strcpy (fname, fname+2);
9709 no_prefix_seen = 1; /* mark this for later */
9711 /* Look for the boundary between the VMS and UNIX filespecs */
9712 cp = rindex (fname, ']'); /* Look for end of dirspec. */
9713 if (cp == 0) cp = rindex (fname, '>'); /* ... Ditto */
9714 if (cp == 0) cp = rindex (fname, ':'); /* Look for end of devspec. */
9718 cp = index (fname, '/'); /* Look for the "/" */
9722 * Check if we have a vax-c style '#include filename'
9723 * and add the missing .h
9726 if (index(fname,'.') == 0)
9727 strcat(fname, ".h");
9729 if (index(cp,'.') == 0)
9733 cp2 = Local; /* initialize */
9735 /* We are trying to do a number of things here. First of all, we are
9736 trying to hammer the filenames into a standard format, such that later
9737 processing can handle them.
9739 If the file name contains something like [dir.], then it recognizes this
9740 as a root, and strips the ".]". Later processing will add whatever is
9741 needed to get things working properly.
9743 If no device is specified, then the first directory name is taken to be
9744 a device name (or a rooted logical). */
9746 /* See if we found that 1st slash */
9747 if (cp == 0) return; /* Nothing to do!!! */
9748 if (*cp != '/') return; /* Nothing to do!!! */
9749 /* Point to the UNIX filename part (which needs to be fixed!) */
9751 /* If the directory spec is not rooted, we can just copy
9752 the UNIX filename part and we are done */
9753 if (((cp - fname) > 1) && ((cp[-1] == ']') || (cp[-1] == '>'))) {
9754 if (cp[-2] != '.') {
9756 * The VMS part ends in a `]', and the preceding character is not a `.'.
9757 * We strip the `]', and then splice the two parts of the name in the
9758 * usual way. Given the default locations for include files in cccp.c,
9759 * we will only use this code if the user specifies alternate locations
9760 * with the /include (-I) switch on the command line. */
9761 cp -= 1; /* Strip "]" */
9762 cp1--; /* backspace */
9765 * The VMS part has a ".]" at the end, and this will not do. Later
9766 * processing will add a second directory spec, and this would be a syntax
9767 * error. Thus we strip the ".]", and thus merge the directory specs.
9768 * We also backspace cp1, so that it points to a '/'. This inhibits the
9769 * generation of the 000000 root directory spec (which does not belong here
9772 cp -= 2; /* Strip ".]" */
9773 cp1--; }; /* backspace */
9776 /* We drop in here if there is no VMS style directory specification yet.
9777 * If there is no device specification either, we make the first dir a
9778 * device and try that. If we do not do this, then we will be essentially
9779 * searching the users default directory (as if they did a #include "asdf.h").
9781 * Then all we need to do is to push a '[' into the output string. Later
9782 * processing will fill this in, and close the bracket.
9784 if (cp[-1] != ':') *cp2++ = ':'; /* dev not in spec. take first dir */
9785 *cp2++ = '['; /* Open the directory specification */
9788 /* at this point we assume that we have the device spec, and (at least
9789 the opening "[" for a directory specification. We may have directories
9790 specified already */
9792 /* If there are no other slashes then the filename will be
9793 in the "root" directory. Otherwise, we need to add
9794 directory specifications. */
9795 if (index (cp1, '/') == 0) {
9796 /* Just add "000000]" as the directory string */
9797 strcpy (cp2, "000000]");
9798 cp2 += strlen (cp2);
9799 check_filename_before_returning = 1; /* we might need to fool with this later */
9801 /* As long as there are still subdirectories to add, do them. */
9802 while (index (cp1, '/') != 0) {
9803 /* If this token is "." we can ignore it */
9804 if ((cp1[0] == '.') && (cp1[1] == '/')) {
9808 /* Add a subdirectory spec. Do not duplicate "." */
9809 if (cp2[-1] != '.' && cp2[-1] != '[' && cp2[-1] != '<')
9811 /* If this is ".." then the spec becomes "-" */
9812 if ((cp1[0] == '.') && (cp1[1] == '.') && (cp[2] == '/')) {
9813 /* Add "-" and skip the ".." */
9818 /* Copy the subdirectory */
9819 while (*cp1 != '/') *cp2++= *cp1++;
9820 cp1++; /* Skip the "/" */
9822 /* Close the directory specification */
9823 if (cp2[-1] == '.') /* no trailing periods */
9827 /* Now add the filename */
9828 while (*cp1) *cp2++ = *cp1++;
9830 /* Now append it to the original VMS spec. */
9833 /* If we put a [000000] in the filename, try to open it first. If this fails,
9834 remove the [000000], and return that name. This provides flexibility
9835 to the user in that they can use both rooted and non-rooted logical names
9836 to point to the location of the file. */
9838 if (check_filename_before_returning && no_prefix_seen) {
9839 f = open (fname, O_RDONLY, 0666);
9841 /* The file name is OK as it is, so return it as is. */
9845 /* The filename did not work. Try to remove the [000000] from the name,
9847 cp = index (fname, '[');
9848 cp2 = index (fname, ']') + 1;
9849 strcpy (cp, cp2); /* this gets rid of it */
9857 /* These are the read/write replacement routines for
9858 VAX-11 "C". They make read/write behave enough
9859 like their UNIX counterparts that CCCP will work */
9862 read (fd, buf, size)
9867 #undef read /* Get back the REAL read routine */
9869 register int total = 0;
9871 /* Read until the buffer is exhausted */
9873 /* Limit each read to 32KB */
9874 i = (size > (32*1024)) ? (32*1024) : size;
9875 i = read (fd, buf, i);
9877 if (i == 0) return (total);
9880 /* Account for this read */
9889 write (fd, buf, size)
9894 #undef write /* Get back the REAL write routine */
9898 /* Limit individual writes to 32Kb */
9901 j = (i > (32*1024)) ? (32*1024) : i;
9902 if (write (fd, buf, j) < 0) return (-1);
9903 /* Account for the data written */
9910 /* The following wrapper functions supply additional arguments to the VMS
9911 I/O routines to optimize performance with file handling. The arguments
9913 "mbc=16" - Set multi-block count to 16 (use a 8192 byte buffer).
9914 "deq=64" - When extending the file, extend it in chunks of 32Kbytes.
9915 "fop=tef"- Truncate unused portions of file when closing file.
9916 "shr=nil"- Disallow file sharing while file is open.
9920 freopen (fname, type, oldfile)
9925 #undef freopen /* Get back the REAL fopen routine */
9926 if (strcmp (type, "w") == 0)
9927 return freopen (fname, type, oldfile, "mbc=16", "deq=64", "fop=tef", "shr=nil");
9928 return freopen (fname, type, oldfile, "mbc=16");
9936 #undef fopen /* Get back the REAL fopen routine */
9937 if (strcmp (type, "w") == 0)
9938 return fopen (fname, type, "mbc=16", "deq=64", "fop=tef", "shr=nil");
9939 return fopen (fname, type, "mbc=16");
9943 open (fname, flags, prot)
9948 #undef open /* Get back the REAL open routine */
9949 return open (fname, flags, prot, "mbc=16", "deq=64", "fop=tef");
9952 /* Avoid run-time library bug, where copying M out of N+M characters with
9953 N >= 65535 results in VAXCRTL's strncat falling into an infinite loop.
9954 gcc-cpp exercises this particular bug. */
9957 strncat (dst, src, cnt)
9962 register char *d = dst, *s = (char *) src;
9963 register int n = cnt; /* convert to _signed_ type */
9965 while (*d) d++; /* advance to end */
9967 if (!(*d++ = *s++)) break;
9968 if (n < 0) *d = '\0';