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 /* Pre-C-Preprocessor to translate ANSI trigraph idiocy in BUF
2199 before main CCCP processing. Name `pcp' is also in honor of the
2200 drugs the trigraph designers must have been on.
2202 Using an extra pass through the buffer takes a little extra time,
2203 but is infinitely less hairy than trying to handle trigraphs inside
2204 strings, etc. everywhere, and also makes sure that trigraphs are
2205 only translated in the top level of processing. */
2211 register U_CHAR c, *fptr, *bptr, *sptr;
2214 fptr = bptr = sptr = buf->buf;
2215 while ((sptr = (U_CHAR *) index (sptr, '?')) != NULL) {
2252 len = sptr - fptr - 2;
2254 /* BSD doc says bcopy () works right for overlapping strings. In ANSI
2255 C, this will be memmove (). */
2256 if (bptr != fptr && len > 0)
2257 bcopy ((char *) fptr, (char *) bptr, len);
2263 len = buf->length - (fptr - buf->buf);
2264 if (bptr != fptr && len > 0)
2265 bcopy ((char *) fptr, (char *) bptr, len);
2266 buf->length -= fptr - bptr;
2267 buf->buf[buf->length] = '\0';
2268 if (warn_trigraphs && fptr != bptr)
2269 warning ("%d trigraph(s) encountered", (fptr - bptr) / 2);
2272 /* Move all backslash-newline pairs out of embarrassing places.
2273 Exchange all such pairs following BP
2274 with any potentially-embarrassing characters that follow them.
2275 Potentially-embarrassing characters are / and *
2276 (because a backslash-newline inside a comment delimiter
2277 would cause it not to be recognized). */
2283 register U_CHAR *p = bp;
2284 register int count = 0;
2286 /* First count the backslash-newline pairs here. */
2292 else if (p[1] == '\r' && p[2] == '\n')
2300 /* What follows the backslash-newlines is not embarrassing. */
2302 if (count == 0 || (*p != '/' && *p != '*'))
2305 /* Copy all potentially embarrassing characters
2306 that follow the backslash-newline pairs
2307 down to where the pairs originally started. */
2309 while (*p == '*' || *p == '/')
2312 /* Now write the same number of pairs after the embarrassing chars. */
2313 while (count-- > 0) {
2319 /* Like newline_fix but for use within a directive-name.
2320 Move any backslash-newlines up past any following symbol constituents. */
2323 name_newline_fix (bp)
2326 register U_CHAR *p = bp;
2327 register int count = 0;
2329 /* First count the backslash-newline pairs here. */
2334 else if (p[1] == '\r' && p[2] == '\n')
2342 /* What follows the backslash-newlines is not embarrassing. */
2344 if (count == 0 || !is_idchar[*p])
2347 /* Copy all potentially embarrassing characters
2348 that follow the backslash-newline pairs
2349 down to where the pairs originally started. */
2351 while (is_idchar[*p])
2354 /* Now write the same number of pairs after the embarrassing chars. */
2355 while (count-- > 0) {
2361 /* Look for lint commands in comments.
2363 When we come in here, ibp points into a comment. Limit is as one expects.
2364 scan within the comment -- it should start, after lwsp, with a lint command.
2365 If so that command is returned as a (constant) string.
2367 Upon return, any arg will be pointed to with argstart and will be
2368 arglen long. Note that we don't parse that arg since it will just
2369 be printed out again.
2373 get_lintcmd (ibp, limit, argstart, arglen, cmdlen)
2374 register U_CHAR *ibp;
2375 register U_CHAR *limit;
2376 U_CHAR **argstart; /* point to command arg */
2377 int *arglen, *cmdlen; /* how long they are */
2380 register U_CHAR *numptr; /* temp for arg parsing */
2384 SKIP_WHITE_SPACE (ibp);
2386 if (ibp >= limit) return NULL;
2388 linsize = limit - ibp;
2390 /* Oh, I wish C had lexical functions... hell, I'll just open-code the set */
2391 if ((linsize >= 10) && !strncmp (ibp, "NOTREACHED", 10)) {
2393 return "NOTREACHED";
2395 if ((linsize >= 8) && !strncmp (ibp, "ARGSUSED", 8)) {
2399 if ((linsize >= 11) && !strncmp (ibp, "LINTLIBRARY", 11)) {
2401 return "LINTLIBRARY";
2403 if ((linsize >= 7) && !strncmp (ibp, "VARARGS", 7)) {
2405 ibp += 7; linsize -= 7;
2406 if ((linsize == 0) || ! isdigit (*ibp)) return "VARARGS";
2408 /* OK, read a number */
2409 for (numptr = *argstart = ibp; (numptr < limit) && isdigit (*numptr);
2411 *arglen = numptr - *argstart;
2418 * The main loop of the program.
2420 * Read characters from the input stack, transferring them to the
2423 * Macros are expanded and push levels on the input stack.
2424 * At the end of such a level it is popped off and we keep reading.
2425 * At the end of any other kind of level, we return.
2426 * #-directives are handled, except within macros.
2428 * If OUTPUT_MARKS is nonzero, keep Newline markers found in the input
2429 * and insert them when appropriate. This is set while scanning macro
2430 * arguments before substitution. It is zero when scanning for final output.
2431 * There are three types of Newline markers:
2432 * * Newline - follows a macro name that was not expanded
2433 * because it appeared inside an expansion of the same macro.
2434 * This marker prevents future expansion of that identifier.
2435 * When the input is rescanned into the final output, these are deleted.
2436 * These are also deleted by ## concatenation.
2437 * * Newline Space (or Newline and any other whitespace character)
2438 * stands for a place that tokens must be separated or whitespace
2439 * is otherwise desirable, but where the ANSI standard specifies there
2440 * is no whitespace. This marker turns into a Space (or whichever other
2441 * whitespace char appears in the marker) in the final output,
2442 * but it turns into nothing in an argument that is stringified with #.
2443 * Such stringified arguments are the only place where the ANSI standard
2444 * specifies with precision that whitespace may not appear.
2446 * During this function, IP->bufp is kept cached in IBP for speed of access.
2447 * Likewise, OP->bufp is kept in OBP. Before calling a subroutine
2448 * IBP, IP and OBP must be copied back to memory. IP and IBP are
2449 * copied back with the RECACHE macro. OBP must be copied back from OP->bufp
2450 * explicitly, and before RECACHE, since RECACHE uses OBP.
2454 rescan (op, output_marks)
2458 /* Character being scanned in main loop. */
2461 /* Length of pending accumulated identifier. */
2462 register int ident_length = 0;
2464 /* Hash code of pending accumulated identifier. */
2465 register int hash = 0;
2467 /* Current input level (&instack[indepth]). */
2470 /* Pointer for scanning input. */
2471 register U_CHAR *ibp;
2473 /* Pointer to end of input. End of scan is controlled by LIMIT. */
2474 register U_CHAR *limit;
2476 /* Pointer for storing output. */
2477 register U_CHAR *obp;
2479 /* REDO_CHAR is nonzero if we are processing an identifier
2480 after backing up over the terminating character.
2481 Sometimes we process an identifier without backing up over
2482 the terminating character, if the terminating character
2483 is not special. Backing up is done so that the terminating character
2484 will be dispatched on again once the identifier is dealt with. */
2487 /* 1 if within an identifier inside of which a concatenation
2488 marker (Newline -) has been seen. */
2489 int concatenated = 0;
2491 /* While scanning a comment or a string constant,
2492 this records the line it started on, for error messages. */
2495 /* Record position of last `real' newline. */
2496 U_CHAR *beg_of_line;
2498 /* Pop the innermost input stack level, assuming it is a macro expansion. */
2501 do { ip->macro->type = T_MACRO; \
2502 if (ip->free_ptr) free (ip->free_ptr); \
2503 --indepth; } while (0)
2505 /* Reload `rescan's local variables that describe the current
2506 level of the input stack. */
2509 do { ip = &instack[indepth]; \
2511 limit = ip->buf + ip->length; \
2513 check_expand (op, limit - ibp); \
2515 obp = op->bufp; } while (0)
2517 if (no_output && instack[indepth].fname != 0)
2518 skip_if_group (&instack[indepth], 1, NULL);
2525 /* Our caller must always put a null after the end of
2526 the input at each input stack level. */
2539 /* Always merge lines ending with backslash-newline,
2540 even in middle of identifier. */
2543 --obp; /* remove backslash from obuf */
2546 /* Otherwise, backslash suppresses specialness of following char,
2547 so copy it here to prevent the switch from seeing it.
2548 But first get any pending identifier processed. */
2549 if (ident_length > 0)
2555 if (assertions_flag) {
2556 /* Copy #foo (bar lose) without macro expansion. */
2557 SKIP_WHITE_SPACE (ibp);
2558 while (is_idchar[*ibp])
2560 SKIP_WHITE_SPACE (ibp);
2563 skip_paren_group (ip);
2564 bcopy ((char *) ibp, (char *) obp, ip->bufp - ibp);
2565 obp += ip->bufp - ibp;
2570 /* If this is expanding a macro definition, don't recognize
2571 preprocessor directives. */
2574 /* If this is expand_into_temp_buffer, recognize them
2575 only after an actual newline at this level,
2576 not at the beginning of the input level. */
2577 if (ip->fname == 0 && beg_of_line == ip->buf)
2583 /* # keyword: a # must be first nonblank char on the line */
2584 if (beg_of_line == 0)
2589 /* Scan from start of line, skipping whitespace, comments
2590 and backslash-newlines, and see if we reach this #.
2591 If not, this # is not special. */
2593 /* If -traditional, require # to be at beginning of line. */
2596 if (is_hor_space[*bp])
2598 else if (*bp == '\\' && bp[1] == '\n')
2600 else if (*bp == '/' && bp[1] == '*') {
2602 while (!(*bp == '*' && bp[1] == '/'))
2606 /* There is no point in trying to deal with C++ // comments here,
2607 because if there is one, then this # must be part of the
2608 comment and we would never reach here. */
2615 /* This # can start a directive. */
2617 --obp; /* Don't copy the '#' */
2621 if (! handle_directive (ip, op)) {
2625 /* Not a known directive: treat it as ordinary text.
2626 IP, OP, IBP, etc. have not been changed. */
2627 if (no_output && instack[indepth].fname) {
2628 /* If not generating expanded output,
2629 what we do with ordinary text is skip it.
2630 Discard everything until next # directive. */
2631 skip_if_group (&instack[indepth], 1, 0);
2636 ++obp; /* Copy the '#' after all */
2637 /* Don't expand an identifier that could be a macro directive.
2638 (Section 3.8.3 of the ANSI C standard) */
2639 SKIP_WHITE_SPACE (ibp);
2640 if (is_idstart[*ibp])
2643 while (is_idchar[*ibp])
2651 /* A # directive has been successfully processed. */
2652 /* If not generating expanded output, ignore everything until
2653 next # directive. */
2654 if (no_output && instack[indepth].fname)
2655 skip_if_group (&instack[indepth], 1, 0);
2661 case '\"': /* skip quoted string */
2663 /* A single quoted string is treated like a double -- some
2664 programs (e.g., troff) are perverse this way */
2669 start_line = ip->lineno;
2671 /* Skip ahead to a matching quote. */
2675 if (ip->macro != 0) {
2676 /* try harder: this string crosses a macro expansion boundary.
2677 This can happen naturally if -traditional.
2678 Otherwise, only -D can make a macro with an unmatched quote. */
2684 error_with_line (line_for_error (start_line),
2685 "unterminated string or character constant");
2686 error_with_line (multiline_string_line,
2687 "possible real start of unterminated constant");
2688 multiline_string_line = 0;
2697 /* Traditionally, end of line ends a string constant with no error.
2698 So exit the loop and record the new line. */
2704 error_with_line (line_for_error (start_line),
2705 "unterminated character constant");
2708 if (pedantic && multiline_string_line == 0) {
2709 pedwarn_with_line (line_for_error (start_line),
2710 "string constant runs past end of line");
2712 if (multiline_string_line == 0)
2713 multiline_string_line = ip->lineno - 1;
2720 /* Backslash newline is replaced by nothing at all,
2721 but keep the line counts correct. */
2726 /* ANSI stupidly requires that in \\ the second \
2727 is *not* prevented from combining with a newline. */
2728 while (*ibp == '\\' && ibp[1] == '\n') {
2747 if (*ibp == '\\' && ibp[1] == '\n')
2751 && !(cplusplus_comments && *ibp == '/'))
2759 /* C++ style comment... */
2760 start_line = ip->lineno;
2762 --ibp; /* Back over the slash */
2765 /* Comments are equivalent to spaces. */
2766 if (! put_out_comments)
2769 /* must fake up a comment here */
2774 U_CHAR *before_bp = ibp+2;
2776 while (ibp < limit) {
2777 if (ibp[-1] != '\\' && *ibp == '\n') {
2778 if (put_out_comments) {
2779 bcopy ((char *) before_bp, (char *) obp, ibp - before_bp);
2780 obp += ibp - before_bp;
2786 /* Copy the newline into the output buffer, in order to
2787 avoid the pain of a #line every time a multiline comment
2789 if (!put_out_comments)
2800 /* Ordinary C comment. Skip it, optionally copying it to output. */
2802 start_line = ip->lineno;
2804 ++ibp; /* Skip the star. */
2806 /* If this cpp is for lint, we peek inside the comments: */
2810 char *lintcmd = get_lintcmd (ibp, limit, &argbp, &arglen, &cmdlen);
2812 if (lintcmd != NULL) {
2814 check_expand (op, 13 + cmdlen);
2816 /* I believe it is always safe to emit this newline: */
2818 bcopy ("#pragma lint ", (char *) obp, 13);
2820 bcopy (lintcmd, (char *) obp, cmdlen);
2825 bcopy (argbp, (char *) obp, arglen);
2829 /* OK, now bring us back to the state we were in before we entered
2830 this branch. We need #line because the #pragma's newline always
2831 messes up the line count. */
2833 output_line_command (ip, op, 0, same_file);
2834 check_expand (op, ip->length - (ip->bufp - ip->buf));
2840 /* Comments are equivalent to spaces.
2841 Note that we already output the slash; we might not want it.
2842 For -traditional, a comment is equivalent to nothing. */
2843 if (! put_out_comments) {
2853 U_CHAR *before_bp = ibp;
2855 while (ibp < limit) {
2858 if (warn_comments && ibp < limit && *ibp == '*')
2859 warning ("`/*' within comment");
2862 if (*ibp == '\\' && ibp[1] == '\n')
2864 if (ibp >= limit || *ibp == '/')
2869 /* Copy the newline into the output buffer, in order to
2870 avoid the pain of a #line every time a multiline comment
2872 if (!put_out_comments)
2880 error_with_line (line_for_error (start_line),
2881 "unterminated comment");
2884 if (put_out_comments) {
2885 bcopy ((char *) before_bp, (char *) obp, ibp - before_bp);
2886 obp += ibp - before_bp;
2893 if (!dollars_in_ident)
2897 case '0': case '1': case '2': case '3': case '4':
2898 case '5': case '6': case '7': case '8': case '9':
2899 /* If digit is not part of identifier, it starts a number,
2900 which means that following letters are not an identifier.
2901 "0x5" does not refer to an identifier "x5".
2902 So copy all alphanumerics that follow without accumulating
2903 as an identifier. Periods also, for sake of "3.e7". */
2905 if (ident_length == 0) {
2906 while (ibp < limit) {
2907 while (ibp < limit && ibp[0] == '\\' && ibp[1] == '\n') {
2912 /* ".." terminates a preprocessing number. This is useless for C
2913 code but useful for preprocessing other things. */
2914 if (!isalnum (c) && (c != '.' || *ibp == '.') && c != '_') {
2919 /* A sign can be part of a preprocessing number
2920 if it follows an e. */
2921 if (c == 'e' || c == 'E') {
2922 while (ibp < limit && ibp[0] == '\\' && ibp[1] == '\n') {
2926 if (ibp < limit && (*ibp == '+' || *ibp == '-')) {
2928 /* But traditional C does not let the token go past the sign. */
2939 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
2940 case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
2941 case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
2942 case 's': case 't': case 'u': case 'v': case 'w': case 'x':
2944 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
2945 case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
2946 case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
2947 case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
2951 /* Compute step of hash function, to avoid a proc call on every token */
2952 hash = HASHSTEP (hash, c);
2956 if (ip->fname == 0 && *ibp == '-') {
2957 /* Newline - inhibits expansion of preceding token.
2958 If expanding a macro arg, we keep the newline -.
2959 In final output, it is deleted.
2960 We recognize Newline - in macro bodies and macro args. */
2961 if (! concatenated) {
2966 if (!output_marks) {
2969 /* If expanding a macro arg, keep the newline -. */
2975 /* If reprocessing a macro expansion, newline is a special marker. */
2976 else if (ip->macro != 0) {
2977 /* Newline White is a "funny space" to separate tokens that are
2978 supposed to be separate but without space between.
2979 Here White means any whitespace character.
2980 Newline - marks a recursive macro use that is not
2981 supposed to be expandable. */
2983 if (is_space[*ibp]) {
2984 /* Newline Space does not prevent expansion of preceding token
2985 so expand the preceding token and then come back. */
2986 if (ident_length > 0)
2989 /* If generating final output, newline space makes a space. */
2990 if (!output_marks) {
2992 /* And Newline Newline makes a newline, so count it. */
2993 if (obp[-1] == '\n')
2996 /* If expanding a macro arg, keep the newline space.
2997 If the arg gets stringified, newline space makes nothing. */
3000 } else abort (); /* Newline followed by something random? */
3004 /* If there is a pending identifier, handle it and come back here. */
3005 if (ident_length > 0)
3010 /* Update the line counts and output a #line if necessary. */
3013 if (ip->lineno != op->lineno) {
3015 output_line_command (ip, op, 1, same_file);
3016 check_expand (op, ip->length - (ip->bufp - ip->buf));
3021 /* Come here either after (1) a null character that is part of the input
3022 or (2) at the end of the input, because there is a null there. */
3025 /* Our input really contains a null character. */
3028 /* At end of a macro-expansion level, pop it and read next level. */
3029 if (ip->macro != 0) {
3032 /* If traditional, and we have an identifier that ends here,
3033 process it now, so we get the right error for recursion. */
3034 if (traditional && ident_length
3035 && ! is_idchar[*instack[indepth - 1].bufp]) {
3044 /* If we don't have a pending identifier,
3045 return at end of input. */
3046 if (ident_length == 0) {
3054 /* If we do have a pending identifier, just consider this null
3055 a special character and arrange to dispatch on it again.
3056 The second time, IDENT_LENGTH will be zero so we will return. */
3062 /* Handle the case of a character such as /, ', " or null
3063 seen following an identifier. Back over it so that
3064 after the identifier is processed the special char
3065 will be dispatched on again. */
3075 if (ident_length > 0) {
3076 register HASHNODE *hp;
3078 /* We have just seen an identifier end. If it's a macro, expand it.
3080 IDENT_LENGTH is the length of the identifier
3081 and HASH is its hash code.
3083 The identifier has already been copied to the output,
3084 so if it is a macro we must remove it.
3086 If REDO_CHAR is 0, the char that terminated the identifier
3087 has been skipped in the output and the input.
3088 OBP-IDENT_LENGTH-1 points to the identifier.
3089 If the identifier is a macro, we must back over the terminator.
3091 If REDO_CHAR is 1, the terminating char has already been
3092 backed over. OBP-IDENT_LENGTH points to the identifier. */
3094 if (!pcp_outfile || pcp_inside_if) {
3096 for (hp = hashtab[MAKE_POS (hash) % HASHSIZE]; hp != NULL;
3099 if (hp->length == ident_length) {
3100 int obufp_before_macroname;
3101 int op_lineno_before_macroname;
3102 register int i = ident_length;
3103 register U_CHAR *p = hp->name;
3104 register U_CHAR *q = obp - i;
3110 do { /* All this to avoid a strncmp () */
3115 /* We found a use of a macro name.
3116 see if the context shows it is a macro call. */
3118 /* Back up over terminating character if not already done. */
3124 /* Save this as a displacement from the beginning of the output
3125 buffer. We can not save this as a position in the output
3126 buffer, because it may get realloc'ed by RECACHE. */
3127 obufp_before_macroname = (obp - op->buf) - ident_length;
3128 op_lineno_before_macroname = op->lineno;
3130 if (hp->type == T_PCSTRING) {
3131 pcstring_used (hp); /* Mark the definition of this key
3132 as needed, ensuring that it
3134 break; /* Exit loop, since the key cannot have a
3135 definition any longer. */
3138 /* Record whether the macro is disabled. */
3139 disabled = hp->type == T_DISABLED;
3141 /* This looks like a macro ref, but if the macro was disabled,
3142 just copy its name and put in a marker if requested. */
3146 /* This error check caught useful cases such as
3147 #define foo(x,y) bar (x (y,0), y)
3150 error ("recursive use of macro `%s'", hp->name);
3154 check_expand (op, limit - ibp + 2);
3161 /* If macro wants an arglist, verify that a '(' follows.
3162 first skip all whitespace, copying it to the output
3163 after the macro name. Then, if there is no '(',
3164 decide this is not a macro call and leave things that way. */
3165 if ((hp->type == T_MACRO || hp->type == T_DISABLED)
3166 && hp->value.defn->nargs >= 0)
3168 U_CHAR *old_ibp = ibp;
3169 U_CHAR *old_obp = obp;
3170 int old_iln = ip->lineno;
3171 int old_oln = op->lineno;
3174 /* Scan forward over whitespace, copying it to the output. */
3175 if (ibp == limit && ip->macro != 0) {
3180 old_iln = ip->lineno;
3181 old_oln = op->lineno;
3183 /* A comment: copy it unchanged or discard it. */
3184 else if (*ibp == '/' && ibp+1 != limit && ibp[1] == '*') {
3185 if (put_out_comments) {
3188 } else if (! traditional) {
3192 while (ibp + 1 != limit
3193 && !(ibp[0] == '*' && ibp[1] == '/')) {
3194 /* We need not worry about newline-marks,
3195 since they are never found in comments. */
3197 /* Newline in a file. Count it. */
3201 if (put_out_comments)
3207 if (put_out_comments) {
3212 else if (is_space[*ibp]) {
3214 if (ibp[-1] == '\n') {
3215 if (ip->macro == 0) {
3216 /* Newline in a file. Count it. */
3219 } else if (!output_marks) {
3220 /* A newline mark, and we don't want marks
3221 in the output. If it is newline-hyphen,
3222 discard it entirely. Otherwise, it is
3223 newline-whitechar, so keep the whitechar. */
3233 /* A newline mark; copy both chars to the output. */
3241 /* It isn't a macro call.
3242 Put back the space that we just skipped. */
3245 ip->lineno = old_iln;
3246 op->lineno = old_oln;
3247 /* Exit the for loop. */
3252 /* This is now known to be a macro call.
3253 Discard the macro name from the output,
3254 along with any following whitespace just copied. */
3255 obp = op->buf + obufp_before_macroname;
3256 op->lineno = op_lineno_before_macroname;
3258 /* Prevent accidental token-pasting with a character
3259 before the macro call. */
3260 if (!traditional && obp != op->buf
3261 && (obp[-1] == '-' || obp[1] == '+' || obp[1] == '&'
3262 || obp[-1] == '|' || obp[1] == '<' || obp[1] == '>')) {
3263 /* If we are expanding a macro arg, make a newline marker
3264 to separate the tokens. If we are making real output,
3265 a plain space will do. */
3271 /* Expand the macro, reading arguments as needed,
3272 and push the expansion on the input stack. */
3275 macroexpand (hp, op);
3277 /* Reexamine input stack, since macroexpand has pushed
3278 a new level on it. */
3285 } /* End hash-table-search loop */
3287 ident_length = hash = 0; /* Stop collecting identifier */
3290 } /* End if (ident_length > 0) */
3292 } /* End per-char loop */
3294 /* Come here to return -- but first give an error message
3295 if there was an unterminated successful conditional. */
3297 if (if_stack != ip->if_stack)
3299 char *str = "unknown";
3301 switch (if_stack->type)
3320 error_with_line (line_for_error (if_stack->lineno),
3321 "unterminated `#%s' conditional", str);
3323 if_stack = ip->if_stack;
3327 * Rescan a string into a temporary buffer and return the result
3328 * as a FILE_BUF. Note this function returns a struct, not a pointer.
3330 * OUTPUT_MARKS nonzero means keep Newline markers found in the input
3331 * and insert such markers when appropriate. See `rescan' for details.
3332 * OUTPUT_MARKS is 1 for macroexpanding a macro argument separately
3333 * before substitution; it is 0 for other uses.
3336 expand_to_temp_buffer (buf, limit, output_marks, assertions)
3337 U_CHAR *buf, *limit;
3338 int output_marks, assertions;
3340 register FILE_BUF *ip;
3342 int length = limit - buf;
3344 int odepth = indepth;
3345 int save_assertions_flag = assertions_flag;
3347 assertions_flag = assertions;
3352 /* Set up the input on the input stack. */
3354 buf1 = (U_CHAR *) alloca (length + 1);
3356 register U_CHAR *p1 = buf;
3357 register U_CHAR *p2 = buf1;
3364 /* Set up to receive the output. */
3366 obuf.length = length * 2 + 100; /* Usually enough. Why be stingy? */
3367 obuf.bufp = obuf.buf = (U_CHAR *) xmalloc (obuf.length);
3372 CHECK_DEPTH ({return obuf;});
3376 ip = &instack[indepth];
3378 ip->nominal_fname = 0;
3379 ip->system_header_p = 0;
3382 ip->length = length;
3383 ip->buf = ip->bufp = buf1;
3384 ip->if_stack = if_stack;
3386 ip->lineno = obuf.lineno = 1;
3388 /* Scan the input, create the output. */
3389 rescan (&obuf, output_marks);
3391 /* Pop input stack to original state. */
3394 if (indepth != odepth)
3397 /* Record the output. */
3398 obuf.length = obuf.bufp - obuf.buf;
3400 assertions_flag = save_assertions_flag;
3405 * Process a # directive. Expects IP->bufp to point after the '#', as in
3406 * `#define foo bar'. Passes to the command handler
3407 * (do_define, do_include, etc.): the addresses of the 1st and
3408 * last chars of the command (starting immediately after the #
3409 * keyword), plus op and the keyword table pointer. If the command
3410 * contains comments it is copied into a temporary buffer sans comments
3411 * and the temporary buffer is passed to the command handler instead.
3412 * Likewise for backslash-newlines.
3414 * Returns nonzero if this was a known # directive.
3415 * Otherwise, returns zero, without advancing the input pointer.
3419 handle_directive (ip, op)
3422 register U_CHAR *bp, *cp;
3423 register struct directive *kt;
3424 register int ident_length;
3427 /* Nonzero means we must copy the entire command
3428 to get rid of comments or backslash-newlines. */
3429 int copy_command = 0;
3431 U_CHAR *ident, *after_ident;
3435 /* Record where the directive started. do_xifdef needs this. */
3436 directive_start = bp - 1;
3438 /* Skip whitespace and \-newline. */
3440 if (is_hor_space[*bp]) {
3441 if ((*bp == '\f' || *bp == '\v') && pedantic)
3442 pedwarn ("%s in preprocessing directive",
3443 *bp == '\f' ? "formfeed" : "vertical tab");
3445 } else if (*bp == '/' && (bp[1] == '*'
3446 || (cplusplus_comments && bp[1] == '/'))) {
3448 skip_to_end_of_comment (ip, &ip->lineno, 0);
3450 } else if (*bp == '\\' && bp[1] == '\n') {
3451 bp += 2; ip->lineno++;
3455 /* Now find end of directive name.
3456 If we encounter a backslash-newline, exchange it with any following
3457 symbol-constituents so that we end up with a contiguous name. */
3464 if (*cp == '\\' && cp[1] == '\n')
3465 name_newline_fix (cp);
3471 ident_length = cp - bp;
3475 /* A line of just `#' becomes blank. */
3477 if (ident_length == 0 && *after_ident == '\n') {
3478 ip->bufp = after_ident;
3482 if (ident_length == 0 || !is_idstart[*ident]) {
3484 while (is_idchar[*p]) {
3485 if (*p < '0' || *p > '9')
3489 /* Handle # followed by a line number. */
3490 if (p != ident && !is_idchar[*p]) {
3491 static struct directive line_directive_table[] = {
3492 { 4, do_line, "line", T_LINE},
3495 pedwarn ("`#' followed by integer");
3496 after_ident = ident;
3497 kt = line_directive_table;
3501 /* Avoid error for `###' and similar cases unless -pedantic. */
3503 while (*p == '#' || is_hor_space[*p]) p++;
3505 if (pedantic && !lang_asm)
3506 warning ("invalid preprocessor directive");
3512 error ("invalid preprocessor directive name");
3518 * Decode the keyword and call the appropriate expansion
3519 * routine, after moving the input pointer up to the next line.
3521 for (kt = directive_table; kt->length > 0; kt++) {
3522 if (kt->length == ident_length && !strncmp (kt->name, ident, ident_length)) {
3523 register U_CHAR *buf;
3524 register U_CHAR *limit;
3527 int *already_output;
3529 /* Nonzero means do not delete comments within the directive.
3530 #define needs this when -traditional. */
3535 limit = ip->buf + ip->length;
3538 keep_comments = traditional && kt->traditional_comments;
3539 /* #import is defined only in Objective C, or when on the NeXT. */
3540 if (kt->type == T_IMPORT && !(objc || lookup ("__NeXT__", -1, -1)))
3543 /* Find the end of this command (first newline not backslashed
3544 and not in a string or comment).
3545 Set COPY_COMMAND if the command must be copied
3546 (it contains a backslash-newline or a comment). */
3548 buf = bp = after_ident;
3549 while (bp < limit) {
3550 register U_CHAR c = *bp++;
3564 bp = skip_quoted_string (bp - 1, limit, ip->lineno, &ip->lineno, ©_command, &unterminated);
3565 /* Don't bother calling the directive if we already got an error
3566 message due to unterminated string. Skip everything and pretend
3567 we called the directive. */
3570 /* Traditional preprocessing permits unterminated strings. */
3579 /* <...> is special for #include. */
3581 if (!kt->angle_brackets)
3583 while (*bp && *bp != '>') bp++;
3587 if (*bp == '\\' && bp[1] == '\n')
3590 || (cplusplus_comments && *bp == '/')) {
3591 U_CHAR *obp = bp - 1;
3593 skip_to_end_of_comment (ip, &ip->lineno, 0);
3595 /* No need to copy the command because of a comment at the end;
3596 just don't include the comment in the directive. */
3597 if (bp == limit || *bp == '\n') {
3601 /* Don't remove the comments if -traditional. */
3602 if (! keep_comments)
3610 pedwarn ("%s in preprocessing directive",
3611 c == '\f' ? "formfeed" : "vertical tab");
3615 --bp; /* Point to the newline */
3623 resume_p = ip->bufp;
3624 /* BP is the end of the directive.
3625 RESUME_P is the next interesting data after the directive.
3626 A comment may come between. */
3628 /* If a directive should be copied through, and -E was given,
3629 pass it through before removing comments. */
3630 if (!no_output && kt->pass_thru && put_out_comments) {
3633 /* Output directive name. */
3634 check_expand (op, kt->length + 2);
3635 /* Make sure # is at the start of a line */
3636 if (op->bufp > op->buf && op->bufp[-1] != '\n') {
3641 bcopy (kt->name, op->bufp, kt->length);
3642 op->bufp += kt->length;
3644 /* Output arguments. */
3646 check_expand (op, len);
3647 bcopy (buf, (char *) op->bufp, len);
3649 /* Take account of any (escaped) newlines just output. */
3651 if (buf[len] == '\n')
3654 already_output = &junk;
3655 } /* Don't we need a newline or #line? */
3658 register U_CHAR *xp = buf;
3659 /* Need to copy entire command into temp buffer before dispatching */
3661 cp = (U_CHAR *) alloca (bp - buf + 5); /* room for cmd plus
3665 /* Copy to the new buffer, deleting comments
3666 and backslash-newlines (and whitespace surrounding the latter). */
3669 register U_CHAR c = *xp++;
3674 abort (); /* A bare newline should never part of the line. */
3677 /* <...> is special for #include. */
3679 if (!kt->angle_brackets)
3681 while (xp < bp && c != '>') {
3683 if (c == '\\' && xp < bp && *xp == '\n')
3694 if (cp != buf && is_space[cp[-1]]) {
3695 while (cp != buf && is_space[cp[-1]]) cp--;
3697 SKIP_WHITE_SPACE (xp);
3698 } else if (is_space[*xp]) {
3700 SKIP_WHITE_SPACE (xp);
3710 register U_CHAR *bp1
3711 = skip_quoted_string (xp - 1, bp, ip->lineno,
3712 NULL_PTR, NULL_PTR, NULL_PTR);
3726 || (cplusplus_comments && *xp == '/')) {
3728 /* If we already copied the command through,
3729 already_output != 0 prevents outputting comment now. */
3730 skip_to_end_of_comment (ip, already_output, 0);
3732 while (xp != ip->bufp)
3734 /* Delete or replace the slash. */
3735 else if (traditional)
3744 /* Null-terminate the copy. */
3750 ip->bufp = resume_p;
3752 /* Some directives should be written out for cc1 to process,
3753 just as if they were not defined. And sometimes we're copying
3754 definitions through. */
3756 if (!no_output && already_output == 0
3758 || (kt->type == T_DEFINE
3759 && (dump_macros == dump_names
3760 || dump_macros == dump_definitions)))) {
3763 /* Output directive name. */
3764 check_expand (op, kt->length + 1);
3766 bcopy (kt->name, (char *) op->bufp, kt->length);
3767 op->bufp += kt->length;
3769 if (kt->pass_thru || dump_macros == dump_definitions) {
3770 /* Output arguments. */
3772 check_expand (op, len);
3773 bcopy (buf, (char *) op->bufp, len);
3775 } else if (kt->type == T_DEFINE && dump_macros == dump_names) {
3778 SKIP_WHITE_SPACE (xp);
3780 while (is_idchar[*xp]) xp++;
3782 check_expand (op, len + 1);
3784 bcopy (yp, op->bufp, len);
3787 } /* Don't we need a newline or #line? */
3789 /* Call the appropriate command handler. buf now points to
3790 either the appropriate place in the input buffer, or to
3791 the temp buffer if it was necessary to make one. cp
3792 points to the first char after the contents of the (possibly
3793 copied) command, in either case. */
3794 (*kt->func) (buf, cp, op, kt);
3795 check_expand (op, ip->length - (ip->bufp - ip->buf));
3801 /* It is deliberate that we don't warn about undefined directives.
3802 That is the responsibility of cc1. */
3809 static struct tm *timebuf;
3811 time_t t = time (0);
3812 timebuf = localtime (&t);
3817 static char *monthnames[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
3818 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
3822 * expand things like __FILE__. Place the expansion into the output
3823 * buffer *without* rescanning.
3827 special_symbol (hp, op)
3834 FILE_BUF *ip = NULL;
3837 int paren = 0; /* For special `defined' keyword */
3839 if (pcp_outfile && pcp_inside_if
3840 && hp->type != T_SPEC_DEFINED && hp->type != T_CONST)
3841 error ("Predefined macro `%s' used inside `#if' during precompilation",
3844 for (i = indepth; i >= 0; i--)
3845 if (instack[i].fname != NULL) {
3850 error ("cccp error: not in any file?!");
3851 return; /* the show must go on */
3859 if (hp->type == T_FILE)
3860 string = ip->nominal_fname;
3862 string = instack[0].nominal_fname;
3866 buf = (char *) alloca (3 + 4 * strlen (string));
3867 quote_string (buf, string);
3875 case T_INCLUDE_LEVEL:
3877 for (i = indepth; i >= 0; i--)
3878 if (instack[i].fname != NULL)
3881 buf = (char *) alloca (8); /* Eight bytes ought to be more than enough */
3882 sprintf (buf, "%d", true_indepth - 1);
3886 buf = (char *) alloca (3 + strlen (version_string));
3887 sprintf (buf, "\"%s\"", version_string);
3890 #ifndef NO_BUILTIN_SIZE_TYPE
3896 #ifndef NO_BUILTIN_PTRDIFF_TYPE
3897 case T_PTRDIFF_TYPE:
3906 case T_USER_LABEL_PREFIX_TYPE:
3907 buf = USER_LABEL_PREFIX;
3910 case T_REGISTER_PREFIX_TYPE:
3911 buf = REGISTER_PREFIX;
3915 buf = (char *) alloca (4 * sizeof (int));
3916 sprintf (buf, "%d", hp->value.ival);
3917 if (pcp_inside_if && pcp_outfile)
3918 /* Output a precondition for this macro use */
3919 fprintf (pcp_outfile, "#define %s %d\n", hp->name, hp->value.ival);
3923 buf = (char *) alloca (10);
3924 sprintf (buf, "%d", ip->lineno);
3929 buf = (char *) alloca (20);
3930 timebuf = timestamp ();
3931 if (hp->type == T_DATE)
3932 sprintf (buf, "\"%s %2d %4d\"", monthnames[timebuf->tm_mon],
3933 timebuf->tm_mday, timebuf->tm_year + 1900);
3935 sprintf (buf, "\"%02d:%02d:%02d\"", timebuf->tm_hour, timebuf->tm_min,
3939 case T_SPEC_DEFINED:
3940 buf = " 0 "; /* Assume symbol is not defined */
3941 ip = &instack[indepth];
3942 SKIP_WHITE_SPACE (ip->bufp);
3943 if (*ip->bufp == '(') {
3945 ip->bufp++; /* Skip over the paren */
3946 SKIP_WHITE_SPACE (ip->bufp);
3949 if (!is_idstart[*ip->bufp])
3951 if (hp = lookup (ip->bufp, -1, -1)) {
3952 if (pcp_outfile && pcp_inside_if
3953 && (hp->type == T_CONST
3954 || (hp->type == T_MACRO && hp->value.defn->predefined)))
3955 /* Output a precondition for this macro use. */
3956 fprintf (pcp_outfile, "#define %s\n", hp->name);
3960 if (pcp_outfile && pcp_inside_if) {
3961 /* Output a precondition for this macro use */
3962 U_CHAR *cp = ip->bufp;
3963 fprintf (pcp_outfile, "#undef ");
3964 while (is_idchar[*cp]) /* Ick! */
3965 fputc (*cp++, pcp_outfile);
3966 putc ('\n', pcp_outfile);
3968 while (is_idchar[*ip->bufp])
3970 SKIP_WHITE_SPACE (ip->bufp);
3972 if (*ip->bufp != ')')
3980 error ("`defined' without an identifier");
3984 error ("cccp error: invalid special hash type"); /* time for gdb */
3988 check_expand (op, len);
3989 bcopy (buf, (char *) op->bufp, len);
3996 /* Routines to handle #directives */
3998 /* Handle #include and #import.
3999 This function expects to see "fname" or <fname> on the input. */
4002 do_include (buf, limit, op, keyword)
4003 U_CHAR *buf, *limit;
4005 struct directive *keyword;
4007 int importing = (keyword->type == T_IMPORT);
4008 int skip_dirs = (keyword->type == T_INCLUDE_NEXT);
4009 static int import_warning = 0;
4010 char *fname; /* Dynamically allocated fname buffer */
4013 U_CHAR *fbeg, *fend; /* Beginning and end of fname */
4015 struct file_name_list *search_start = include; /* Chain of dirs to search */
4016 struct file_name_list dsp[1]; /* First in chain, if #include "..." */
4017 struct file_name_list *searchptr = 0;
4020 int f; /* file number */
4022 int retried = 0; /* Have already tried macro
4023 expanding the include line*/
4024 FILE_BUF trybuf; /* It got expanded into here */
4025 int angle_brackets = 0; /* 0 for "...", 1 for <...> */
4030 f= -1; /* JF we iz paranoid! */
4032 if (importing && warn_import && !inhibit_warnings
4033 && !instack[indepth].system_header_p && !import_warning) {
4035 warning ("using `#import' is not recommended");
4036 fprintf (stderr, "The fact that a certain header file need not be processed more than once\n");
4037 fprintf (stderr, "should be indicated in the header file, not where it is used.\n");
4038 fprintf (stderr, "The best way to do this is with a conditional of this form:\n\n");
4039 fprintf (stderr, " #ifndef _FOO_H_INCLUDED\n");
4040 fprintf (stderr, " #define _FOO_H_INCLUDED\n");
4041 fprintf (stderr, " ... <real contents of file> ...\n");
4042 fprintf (stderr, " #endif /* Not _FOO_H_INCLUDED */\n\n");
4043 fprintf (stderr, "Then users can use `#include' any number of times.\n");
4044 fprintf (stderr, "GNU C automatically avoids processing the file more than once\n");
4045 fprintf (stderr, "when it is equipped with such a conditional.\n");
4051 SKIP_WHITE_SPACE (fbeg);
4052 /* Discard trailing whitespace so we can easily see
4053 if we have parsed all the significant chars we were given. */
4054 while (limit != fbeg && is_hor_space[limit[-1]]) limit--;
4060 /* Copy the operand text, concatenating the strings. */
4063 fbeg = (U_CHAR *) alloca (limit - fbeg + 1);
4065 while (fin != limit) {
4066 while (fin != limit && *fin != '\"')
4071 /* If not at the end, there had better be another string. */
4072 /* Skip just horiz space, and don't go past limit. */
4073 while (fin != limit && is_hor_space[*fin]) fin++;
4074 if (fin != limit && *fin == '\"')
4082 /* We have "filename". Figure out directory this source
4083 file is coming from and put it on the front of the list. */
4085 /* If -I- was specified, don't search current dir, only spec'd ones. */
4086 if (ignore_srcdir) break;
4088 for (fp = &instack[indepth]; fp >= instack; fp--)
4093 if ((nam = fp->nominal_fname) != NULL) {
4094 /* Found a named file. Figure out dir of the file,
4095 and put it in front of the search list. */
4096 dsp[0].next = search_start;
4099 ep = rindex (nam, '/');
4101 ep = rindex (nam, ']');
4102 if (ep == NULL) ep = rindex (nam, '>');
4103 if (ep == NULL) ep = rindex (nam, ':');
4104 if (ep != NULL) ep++;
4108 dsp[0].fname = (char *) alloca (n + 1);
4109 strncpy (dsp[0].fname, nam, n);
4110 dsp[0].fname[n] = '\0';
4111 if (n + INCLUDE_LEN_FUDGE > max_include_len)
4112 max_include_len = n + INCLUDE_LEN_FUDGE;
4114 dsp[0].fname = 0; /* Current directory */
4116 dsp[0].got_name_map = 0;
4125 while (fend != limit && *fend != '>') fend++;
4126 if (*fend == '>' && fend + 1 == limit) {
4128 /* If -I-, start with the first -I dir after the -I-. */
4129 if (first_bracket_include)
4130 search_start = first_bracket_include;
4138 * Support '#include xyz' like VAX-C to allow for easy use of all the
4139 * decwindow include files. It defaults to '#include <xyz.h>' (so the
4140 * code from case '<' is repeated here) and generates a warning.
4142 if (isalpha(*(--fbeg))) {
4144 while (fend != limit && (!isspace(*fend))) fend++;
4145 warning ("VAX-C-style include specification found, use '#include <filename.h>' !");
4146 if (fend == limit) {
4148 /* If -I-, start with the first -I dir after the -I-. */
4149 if (first_bracket_include)
4150 search_start = first_bracket_include;
4158 error ("`#%s' expects \"FILENAME\" or <FILENAME>", keyword->name);
4161 trybuf = expand_to_temp_buffer (buf, limit, 0, 0);
4162 buf = (U_CHAR *) alloca (trybuf.bufp - trybuf.buf + 1);
4163 bcopy ((char *) trybuf.buf, (char *) buf, trybuf.bufp - trybuf.buf);
4164 limit = buf + (trybuf.bufp - trybuf.buf);
4171 /* For #include_next, skip in the search path
4172 past the dir in which the containing file was found. */
4175 for (fp = &instack[indepth]; fp >= instack; fp--)
4176 if (fp->fname != NULL) {
4177 /* fp->dir is null if the containing file was specified
4178 with an absolute file name. In that case, don't skip anything. */
4180 search_start = fp->dir->next;
4189 error ("empty file name in `#%s'", keyword->name);
4193 /* Allocate this permanently, because it gets stored in the definitions
4195 fname = (char *) xmalloc (max_include_len + flen + 4);
4196 /* + 2 above for slash and terminating null. */
4197 /* + 2 added for '.h' on VMS (to support '#include filename') */
4199 /* If specified file name is absolute, just open it. */
4202 strncpy (fname, fbeg, flen);
4204 if (redundant_include_p (fname))
4207 f = lookup_import (fname, NULL_PTR);
4209 f = open_include_file (fname, NULL_PTR);
4211 return 0; /* Already included this file */
4213 /* Search directory path, trying to open the file.
4214 Copy each filename tried into FNAME. */
4216 for (searchptr = search_start; searchptr; searchptr = searchptr->next) {
4217 if (searchptr->fname) {
4218 /* The empty string in a search path is ignored.
4219 This makes it possible to turn off entirely
4220 a standard piece of the list. */
4221 if (searchptr->fname[0] == 0)
4223 strcpy (fname, searchptr->fname);
4224 strcat (fname, "/");
4225 fname[strlen (fname) + flen] = 0;
4229 strncat (fname, fbeg, flen);
4231 /* Change this 1/2 Unix 1/2 VMS file specification into a
4232 full VMS file specification */
4233 if (searchptr->fname && (searchptr->fname[0] != 0)) {
4234 /* Fix up the filename */
4235 hack_vms_include_specification (fname);
4237 /* This is a normal VMS filespec, so use it unchanged. */
4238 strncpy (fname, fbeg, flen);
4240 /* if it's '#include filename', add the missing .h */
4241 if (index(fname,'.')==NULL) {
4242 strcat (fname, ".h");
4247 f = lookup_import (fname, searchptr);
4249 f = open_include_file (fname, searchptr);
4251 return 0; /* Already included this file */
4253 else if (f == -1 && errno == EACCES)
4254 warning ("Header file %s exists, but is not readable", fname);
4256 if (redundant_include_p (fname)) {
4266 /* A file that was not found. */
4268 strncpy (fname, fbeg, flen);
4270 /* If generating dependencies and -MG was specified, we assume missing
4271 files are leaf files, living in the same directory as the source file
4272 or other similar place; these missing files may be generated from
4273 other files and may not exist yet (eg: y.tab.h). */
4274 if (print_deps_missing_files
4275 && print_deps > (angle_brackets || (system_include_depth > 0)))
4277 /* If it was requested as a system header file,
4278 then assume it belongs in the first place to look for such. */
4281 for (searchptr = search_start; searchptr; searchptr = searchptr->next)
4283 if (searchptr->fname)
4287 if (searchptr->fname[0] == 0)
4289 p = xmalloc (strlen (searchptr->fname)
4290 + strlen (fname) + 2);
4291 strcpy (p, searchptr->fname);
4294 deps_output (p, ' ');
4301 /* Otherwise, omit the directory, as if the file existed
4302 in the directory with the source. */
4303 deps_output (fname, ' ');
4306 /* If -M was specified, and this header file won't be added to the
4307 dependency list, then don't count this as an error, because we can
4308 still produce correct output. Otherwise, we can't produce correct
4309 output, because there may be dependencies we need inside the missing
4310 file, and we don't know what directory this missing file exists in. */
4312 && (print_deps <= (angle_brackets || (system_include_depth > 0))))
4313 warning ("No include path in which to find %s", fname);
4314 else if (search_start)
4315 error_from_errno (fname);
4317 error ("No include path in which to find %s", fname);
4321 /* Check to see if this include file is a once-only include file.
4324 struct file_name_list* ptr;
4326 for (ptr = dont_repeat_files; ptr; ptr = ptr->next) {
4327 if (!strcmp (ptr->fname, fname)) {
4329 return 0; /* This file was once'd. */
4333 for (ptr = all_include_files; ptr; ptr = ptr->next) {
4334 if (!strcmp (ptr->fname, fname))
4335 break; /* This file was included before. */
4339 /* This is the first time for this file. */
4340 /* Add it to list of files included. */
4342 ptr = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
4343 ptr->control_macro = 0;
4344 ptr->c_system_include_path = 0;
4345 ptr->next = all_include_files;
4346 all_include_files = ptr;
4347 ptr->fname = savestring (fname);
4348 ptr->got_name_map = 0;
4350 /* For -M, add this file to the dependencies. */
4351 if (print_deps > (angle_brackets || (system_include_depth > 0)))
4352 deps_output (fname, ' ');
4355 /* Handle -H option. */
4356 if (print_include_names) {
4357 output_dots (stderr, indepth);
4358 fprintf (stderr, "%s\n", fname);
4362 system_include_depth++;
4364 /* Actually process the file. */
4365 add_import (f, fname); /* Record file on "seen" list for #import. */
4367 pcftry = (char *) alloca (strlen (fname) + 30);
4375 sprintf (pcftry, "%s%d", fname, pcfnum++);
4377 pcf = open (pcftry, O_RDONLY, 0666);
4383 if (bcmp ((char *) &stat_f.st_ino, (char *) &s.st_ino,
4385 || stat_f.st_dev != s.st_dev)
4387 pcfbuf = check_precompiled (pcf, fname, &pcfbuflimit);
4388 /* Don't need it any more. */
4393 /* Don't need it at all. */
4398 } while (pcf != -1 && !pcfbuf);
4400 /* Actually process the file */
4402 pcfname = xmalloc (strlen (pcftry) + 1);
4403 strcpy (pcfname, pcftry);
4404 pcfinclude (pcfbuf, pcfbuflimit, fname, op);
4407 finclude (f, fname, op, is_system_include (fname), searchptr);
4410 system_include_depth--;
4415 /* Return nonzero if there is no need to include file NAME
4416 because it has already been included and it contains a conditional
4417 to make a repeated include do nothing. */
4420 redundant_include_p (name)
4423 struct file_name_list *l = all_include_files;
4424 for (; l; l = l->next)
4425 if (! strcmp (name, l->fname)
4427 && lookup (l->control_macro, -1, -1))
4432 /* Return nonzero if the given FILENAME is an absolute pathname which
4433 designates a file within one of the known "system" include file
4434 directories. We assume here that if the given FILENAME looks like
4435 it is the name of a file which resides either directly in a "system"
4436 include file directory, or within any subdirectory thereof, then the
4437 given file must be a "system" include file. This function tells us
4438 if we should suppress pedantic errors/warnings for the given FILENAME.
4440 The value is 2 if the file is a C-language system header file
4441 for which C++ should (on most systems) assume `extern "C"'. */
4444 is_system_include (filename)
4445 register char *filename;
4447 struct file_name_list *searchptr;
4449 for (searchptr = first_system_include; searchptr;
4450 searchptr = searchptr->next)
4451 if (searchptr->fname) {
4452 register char *sys_dir = searchptr->fname;
4453 register unsigned length = strlen (sys_dir);
4455 if (! strncmp (sys_dir, filename, length) && filename[length] == '/')
4457 if (searchptr->c_system_include_path)
4466 /* The file_name_map structure holds a mapping of file names for a
4467 particular directory. This mapping is read from the file named
4468 FILE_NAME_MAP_FILE in that directory. Such a file can be used to
4469 map filenames on a file system with severe filename restrictions,
4470 such as DOS. The format of the file name map file is just a series
4471 of lines with two tokens on each line. The first token is the name
4472 to map, and the second token is the actual name to use. */
4474 struct file_name_map
4476 struct file_name_map *map_next;
4481 #define FILE_NAME_MAP_FILE "header.gcc"
4483 /* Read a space delimited string of unlimited length from a stdio
4487 read_filename_string (ch, f)
4495 set = alloc = xmalloc (len + 1);
4499 while ((ch = getc (f)) != EOF && ! is_space[ch])
4501 if (set - alloc == len)
4504 alloc = xrealloc (alloc, len + 1);
4505 set = alloc + len / 2;
4515 /* Read the file name map file for DIRNAME. */
4517 static struct file_name_map *
4518 read_name_map (dirname)
4521 /* This structure holds a linked list of file name maps, one per
4523 struct file_name_map_list
4525 struct file_name_map_list *map_list_next;
4526 char *map_list_name;
4527 struct file_name_map *map_list_map;
4529 static struct file_name_map_list *map_list;
4530 register struct file_name_map_list *map_list_ptr;
4534 for (map_list_ptr = map_list; map_list_ptr;
4535 map_list_ptr = map_list_ptr->map_list_next)
4536 if (! strcmp (map_list_ptr->map_list_name, dirname))
4537 return map_list_ptr->map_list_map;
4539 map_list_ptr = ((struct file_name_map_list *)
4540 xmalloc (sizeof (struct file_name_map_list)));
4541 map_list_ptr->map_list_name = savestring (dirname);
4542 map_list_ptr->map_list_map = NULL;
4544 name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2);
4545 strcpy (name, dirname);
4548 strcat (name, FILE_NAME_MAP_FILE);
4549 f = fopen (name, "r");
4551 map_list_ptr->map_list_map = NULL;
4555 int dirlen = strlen (dirname);
4557 while ((ch = getc (f)) != EOF)
4560 struct file_name_map *ptr;
4564 from = read_filename_string (ch, f);
4565 while ((ch = getc (f)) != EOF && is_hor_space[ch])
4567 to = read_filename_string (ch, f);
4569 ptr = ((struct file_name_map *)
4570 xmalloc (sizeof (struct file_name_map)));
4571 ptr->map_from = from;
4573 /* Make the real filename absolute. */
4578 ptr->map_to = xmalloc (dirlen + strlen (to) + 2);
4579 strcpy (ptr->map_to, dirname);
4580 ptr->map_to[dirlen] = '/';
4581 strcpy (ptr->map_to + dirlen + 1, to);
4585 ptr->map_next = map_list_ptr->map_list_map;
4586 map_list_ptr->map_list_map = ptr;
4588 while ((ch = getc (f)) != '\n')
4595 map_list_ptr->map_list_next = map_list;
4596 map_list = map_list_ptr;
4598 return map_list_ptr->map_list_map;
4601 /* Try to open include file FILENAME. SEARCHPTR is the directory
4602 being tried from the include file search path. This function maps
4603 filenames on file systems based on information read by
4607 open_include_file (filename, searchptr)
4609 struct file_name_list *searchptr;
4611 register struct file_name_map *map;
4612 register char *from;
4615 if (searchptr && ! searchptr->got_name_map)
4617 searchptr->name_map = read_name_map (searchptr->fname
4618 ? searchptr->fname : ".");
4619 searchptr->got_name_map = 1;
4622 /* First check the mapping for the directory we are using. */
4623 if (searchptr && searchptr->name_map)
4626 if (searchptr->fname)
4627 from += strlen (searchptr->fname) + 1;
4628 for (map = searchptr->name_map; map; map = map->map_next)
4630 if (! strcmp (map->map_from, from))
4632 /* Found a match. */
4633 return open (map->map_to, O_RDONLY, 0666);
4638 /* Try to find a mapping file for the particular directory we are
4639 looking in. Thus #include <sys/types.h> will look up sys/types.h
4640 in /usr/include/header.gcc and look up types.h in
4641 /usr/include/sys/header.gcc. */
4642 p = rindex (filename, '/');
4647 && strlen (searchptr->fname) == p - filename
4648 && ! strncmp (searchptr->fname, filename, p - filename))
4650 /* FILENAME is in SEARCHPTR, which we've already checked. */
4651 return open (filename, O_RDONLY, 0666);
4661 dir = (char *) alloca (p - filename + 1);
4662 bcopy (filename, dir, p - filename);
4663 dir[p - filename] = '\0';
4666 for (map = read_name_map (dir); map; map = map->map_next)
4667 if (! strcmp (map->map_from, from))
4668 return open (map->map_to, O_RDONLY, 0666);
4670 return open (filename, O_RDONLY, 0666);
4673 /* Process the contents of include file FNAME, already open on descriptor F,
4675 SYSTEM_HEADER_P is 1 if this file resides in any one of the known
4676 "system" include directories (as decided by the `is_system_include'
4678 DIRPTR is the link in the dir path through which this file was found,
4679 or 0 if the file name was absolute. */
4682 finclude (f, fname, op, system_header_p, dirptr)
4686 int system_header_p;
4687 struct file_name_list *dirptr;
4692 FILE_BUF *fp; /* For input stack frame */
4693 int missing_newline = 0;
4695 CHECK_DEPTH (return;);
4697 if (file_size_and_mode (f, &st_mode, &st_size) < 0)
4699 perror_with_name (fname);
4704 fp = &instack[indepth + 1];
4705 bzero ((char *) fp, sizeof (FILE_BUF));
4706 fp->nominal_fname = fp->fname = fname;
4709 fp->if_stack = if_stack;
4710 fp->system_header_p = system_header_p;
4713 if (S_ISREG (st_mode)) {
4714 fp->buf = (U_CHAR *) xmalloc (st_size + 2);
4717 /* Read the file contents, knowing that st_size is an upper bound
4718 on the number of bytes we can read. */
4719 fp->length = safe_read (f, fp->buf, st_size);
4720 if (fp->length < 0) goto nope;
4722 else if (S_ISDIR (st_mode)) {
4723 error ("directory `%s' specified in #include", fname);
4727 /* Cannot count its file size before reading.
4728 First read the entire file into heap and
4729 copy them into buffer on stack. */
4734 fp->buf = (U_CHAR *) xmalloc (bsize + 2);
4737 i = safe_read (f, fp->buf + st_size, bsize - st_size);
4739 goto nope; /* error! */
4741 if (st_size != bsize)
4742 break; /* End of file */
4744 fp->buf = (U_CHAR *) xrealloc (fp->buf, bsize + 2);
4747 fp->length = st_size;
4750 if ((fp->length > 0 && fp->buf[fp->length - 1] != '\n')
4751 /* Backslash-newline at end is not good enough. */
4752 || (fp->length > 1 && fp->buf[fp->length - 2] == '\\')) {
4753 fp->buf[fp->length++] = '\n';
4754 missing_newline = 1;
4756 fp->buf[fp->length] = '\0';
4758 /* Close descriptor now, so nesting does not use lots of descriptors. */
4761 /* Must do this before calling trigraph_pcp, so that the correct file name
4762 will be printed in warning messages. */
4765 input_file_stack_tick++;
4770 output_line_command (fp, op, 0, enter_file);
4773 if (missing_newline)
4776 if (pedantic && missing_newline)
4777 pedwarn ("file does not end in newline");
4780 input_file_stack_tick++;
4781 output_line_command (&instack[indepth], op, 0, leave_file);
4787 perror_with_name (fname);
4792 /* Record that inclusion of the file named FILE
4793 should be controlled by the macro named MACRO_NAME.
4794 This means that trying to include the file again
4795 will do something if that macro is defined. */
4798 record_control_macro (file, macro_name)
4802 struct file_name_list *new;
4804 for (new = all_include_files; new; new = new->next) {
4805 if (!strcmp (new->fname, file)) {
4806 new->control_macro = macro_name;
4811 /* If the file is not in all_include_files, something's wrong. */
4815 /* Maintain and search list of included files, for #import. */
4817 #define IMPORT_HASH_SIZE 31
4819 struct import_file {
4823 struct import_file *next;
4826 /* Hash table of files already included with #include or #import. */
4828 static struct import_file *import_hash_table[IMPORT_HASH_SIZE];
4830 /* Hash a file name for import_hash_table. */
4838 while (*f) val += *f++;
4839 return (val%IMPORT_HASH_SIZE);
4842 /* Search for file FILENAME in import_hash_table.
4843 Return -2 if found, either a matching name or a matching inode.
4844 Otherwise, open the file and return a file descriptor if successful
4845 or -1 if unsuccessful. */
4848 lookup_import (filename, searchptr)
4850 struct file_name_list *searchptr;
4852 struct import_file *i;
4858 hashval = import_hash (filename);
4860 /* Attempt to find file in list of already included files */
4861 i = import_hash_table[hashval];
4864 if (!strcmp (filename, i->name))
4865 return -2; /* return found */
4868 /* Open it and try a match on inode/dev */
4869 fd = open_include_file (filename, searchptr);
4873 for (h = 0; h < IMPORT_HASH_SIZE; h++) {
4874 i = import_hash_table[h];
4876 /* Compare the inode and the device.
4877 Supposedly on some systems the inode is not a scalar. */
4878 if (!bcmp ((char *) &i->inode, (char *) &sb.st_ino, sizeof (sb.st_ino))
4879 && i->dev == sb.st_dev) {
4881 return -2; /* return found */
4886 return fd; /* Not found, return open file */
4889 /* Add the file FNAME, open on descriptor FD, to import_hash_table. */
4892 add_import (fd, fname)
4896 struct import_file *i;
4900 hashval = import_hash (fname);
4902 i = (struct import_file *)xmalloc (sizeof (struct import_file));
4903 i->name = (char *)xmalloc (strlen (fname)+1);
4904 strcpy (i->name, fname);
4905 bcopy ((char *) &sb.st_ino, (char *) &i->inode, sizeof (sb.st_ino));
4907 i->next = import_hash_table[hashval];
4908 import_hash_table[hashval] = i;
4911 /* Load the specified precompiled header into core, and verify its
4912 preconditions. PCF indicates the file descriptor to read, which must
4913 be a regular file. FNAME indicates the file name of the original
4914 header. *LIMIT will be set to an address one past the end of the file.
4915 If the preconditions of the file are not satisfied, the buffer is
4916 freed and we return 0. If the preconditions are satisfied, return
4917 the address of the buffer following the preconditions. The buffer, in
4918 this case, should never be freed because various pieces of it will
4919 be referred to until all precompiled strings are output at the end of
4923 check_precompiled (pcf, fname, limit)
4937 if (file_size_and_mode (pcf, &st_mode, &st_size) < 0)
4940 if (S_ISREG (st_mode))
4942 buf = xmalloc (st_size + 2);
4943 length = safe_read (pcf, buf, st_size);
4950 if (length > 0 && buf[length-1] != '\n')
4951 buf[length++] = '\n';
4954 *limit = buf + length;
4956 /* File is in core. Check the preconditions. */
4957 if (!check_preconditions (buf))
4959 for (cp = buf; *cp; cp++)
4962 fprintf (stderr, "Using preinclude %s\n", fname);
4968 fprintf (stderr, "Cannot use preinclude %s\n", fname);
4974 /* PREC (null terminated) points to the preconditions of a
4975 precompiled header. These are a series of #define and #undef
4976 lines which must match the current contents of the hash
4979 check_preconditions (prec)
4986 lineend = (char *) index (prec, '\n');
4988 if (*prec++ != '#') {
4989 error ("Bad format encountered while reading precompiled file");
4992 if (!strncmp (prec, "define", 6)) {
4996 mdef = create_definition (prec, lineend, NULL_PTR);
5001 if ((hp = lookup (mdef.symnam, mdef.symlen, -1)) == NULL
5002 || (hp->type != T_MACRO && hp->type != T_CONST)
5003 || (hp->type == T_MACRO
5004 && !compare_defs (mdef.defn, hp->value.defn)
5005 && (mdef.defn->length != 2
5006 || mdef.defn->expansion[0] != '\n'
5007 || mdef.defn->expansion[1] != ' ')))
5009 } else if (!strncmp (prec, "undef", 5)) {
5014 while (is_hor_space[(U_CHAR) *prec])
5017 while (is_idchar[(U_CHAR) *prec])
5021 if (lookup (name, len, -1))
5024 error ("Bad format encountered while reading precompiled file");
5029 /* They all passed successfully */
5033 /* Process the main body of a precompiled file. BUF points to the
5034 string section of the file, following the preconditions. LIMIT is one
5035 character past the end. NAME is the name of the file being read
5036 in. OP is the main output buffer */
5038 pcfinclude (buf, limit, name, op)
5039 U_CHAR *buf, *limit, *name;
5046 /* First in the file comes 4 bytes indicating the number of strings, */
5047 /* in network byte order. (MSB first). */
5049 nstrings = (nstrings << 8) | *cp++;
5050 nstrings = (nstrings << 8) | *cp++;
5051 nstrings = (nstrings << 8) | *cp++;
5053 /* Looping over each string... */
5054 while (nstrings--) {
5055 U_CHAR *string_start;
5056 U_CHAR *endofthiskey;
5060 /* Each string starts with a STRINGDEF structure (str), followed */
5061 /* by the text of the string (string_start) */
5063 /* First skip to a longword boundary */
5064 /* ??? Why a 4-byte boundary? On all machines? */
5065 /* NOTE: This works correctly even if HOST_WIDE_INT
5066 is narrower than a pointer.
5067 Do not try risky measures here to get another type to use!
5068 Do not include stddef.h--it will fail! */
5069 if ((HOST_WIDE_INT) cp & 3)
5070 cp += 4 - ((HOST_WIDE_INT) cp & 3);
5072 /* Now get the string. */
5073 str = (STRINGDEF *) cp;
5074 string_start = cp += sizeof (STRINGDEF);
5076 for (; *cp; cp++) /* skip the string */
5079 /* We need to macro expand the string here to ensure that the
5080 proper definition environment is in place. If it were only
5081 expanded when we find out it is needed, macros necessary for
5082 its proper expansion might have had their definitions changed. */
5083 tmpbuf = expand_to_temp_buffer (string_start, cp++, 0, 0);
5084 /* Lineno is already set in the precompiled file */
5085 str->contents = tmpbuf.buf;
5086 str->len = tmpbuf.length;
5088 str->filename = name;
5089 str->output_mark = outbuf.bufp - outbuf.buf;
5092 *stringlist_tailp = str;
5093 stringlist_tailp = &str->chain;
5095 /* Next comes a fourbyte number indicating the number of keys */
5096 /* for this string. */
5098 nkeys = (nkeys << 8) | *cp++;
5099 nkeys = (nkeys << 8) | *cp++;
5100 nkeys = (nkeys << 8) | *cp++;
5102 /* If this number is -1, then the string is mandatory. */
5106 /* Otherwise, for each key, */
5107 for (; nkeys--; free (tmpbuf.buf), cp = endofthiskey + 1) {
5108 KEYDEF *kp = (KEYDEF *) cp;
5111 /* It starts with a KEYDEF structure */
5112 cp += sizeof (KEYDEF);
5114 /* Find the end of the key. At the end of this for loop we
5115 advance CP to the start of the next key using this variable. */
5116 endofthiskey = cp + strlen (cp);
5119 /* Expand the key, and enter it into the hash table. */
5120 tmpbuf = expand_to_temp_buffer (cp, endofthiskey, 0, 0);
5121 tmpbuf.bufp = tmpbuf.buf;
5123 while (is_hor_space[*tmpbuf.bufp])
5125 if (!is_idstart[*tmpbuf.bufp]
5126 || tmpbuf.bufp == tmpbuf.buf + tmpbuf.length) {
5131 hp = lookup (tmpbuf.bufp, -1, -1);
5134 install (tmpbuf.bufp, -1, T_PCSTRING, 0, (char *) kp, -1);
5136 else if (hp->type == T_PCSTRING) {
5137 kp->chain = hp->value.keydef;
5138 hp->value.keydef = kp;
5144 /* This output_line_command serves to switch us back to the current
5145 input file in case some of these strings get output (which will
5146 result in line commands for the header file being output). */
5147 output_line_command (&instack[indepth], op, 0, enter_file);
5150 /* Called from rescan when it hits a key for strings. Mark them all */
5151 /* used and clean up. */
5158 for (kp = hp->value.keydef; kp; kp = kp->chain)
5159 kp->str->writeflag = 1;
5163 /* Write the output, interspersing precompiled strings in their */
5164 /* appropriate places. */
5168 STRINGDEF *next_string;
5169 U_CHAR *cur_buf_loc;
5170 int line_command_len = 80;
5171 char *line_command = xmalloc (line_command_len);
5174 /* In each run through the loop, either cur_buf_loc == */
5175 /* next_string_loc, in which case we print a series of strings, or */
5176 /* it is less than next_string_loc, in which case we write some of */
5178 cur_buf_loc = outbuf.buf;
5179 next_string = stringlist;
5181 while (cur_buf_loc < outbuf.bufp || next_string) {
5183 && cur_buf_loc - outbuf.buf == next_string->output_mark) {
5184 if (next_string->writeflag) {
5185 len = 4 * strlen (next_string->filename) + 32;
5186 while (len > line_command_len)
5187 line_command = xrealloc (line_command,
5188 line_command_len *= 2);
5189 sprintf (line_command, "\n# %d ", next_string->lineno);
5190 strcpy (quote_string (line_command + strlen (line_command),
5191 next_string->filename),
5193 safe_write (fileno (stdout), line_command, strlen (line_command));
5194 safe_write (fileno (stdout), next_string->contents, next_string->len);
5196 next_string = next_string->chain;
5200 ? (next_string->output_mark
5201 - (cur_buf_loc - outbuf.buf))
5202 : outbuf.bufp - cur_buf_loc);
5204 safe_write (fileno (stdout), cur_buf_loc, len);
5208 free (line_command);
5211 /* Pass a directive through to the output file.
5212 BUF points to the contents of the directive, as a contiguous string.
5213 LIMIT points to the first character past the end of the directive.
5214 KEYWORD is the keyword-table entry for the directive. */
5217 pass_thru_directive (buf, limit, op, keyword)
5218 U_CHAR *buf, *limit;
5220 struct directive *keyword;
5222 register unsigned keyword_length = keyword->length;
5224 check_expand (op, 1 + keyword_length + (limit - buf));
5226 bcopy (keyword->name, (char *) op->bufp, keyword_length);
5227 op->bufp += keyword_length;
5228 if (limit != buf && buf[0] != ' ')
5230 bcopy ((char *) buf, (char *) op->bufp, limit - buf);
5231 op->bufp += (limit - buf);
5234 /* Count the line we have just made in the output,
5235 to get in sync properly. */
5240 /* The arglist structure is built by do_define to tell
5241 collect_definition where the argument names begin. That
5242 is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist
5243 would contain pointers to the strings x, y, and z.
5244 Collect_definition would then build a DEFINITION node,
5245 with reflist nodes pointing to the places x, y, and z had
5246 appeared. So the arglist is just convenience data passed
5247 between these two routines. It is not kept around after
5248 the current #define has been processed and entered into the
5252 struct arglist *next;
5259 /* Create a DEFINITION node from a #define directive. Arguments are
5260 as for do_define. */
5262 create_definition (buf, limit, op)
5263 U_CHAR *buf, *limit;
5266 U_CHAR *bp; /* temp ptr into input buffer */
5267 U_CHAR *symname; /* remember where symbol name starts */
5268 int sym_length; /* and how long it is */
5269 int line = instack[indepth].lineno;
5270 char *file = instack[indepth].nominal_fname;
5274 int arglengths = 0; /* Accumulate lengths of arg names
5275 plus number of args. */
5280 while (is_hor_space[*bp])
5283 symname = bp; /* remember where it starts */
5284 sym_length = check_macro_name (bp, "macro");
5287 /* Lossage will occur if identifiers or control keywords are broken
5288 across lines using backslash. This is not the right place to take
5292 struct arglist *arg_ptrs = NULL;
5295 bp++; /* skip '(' */
5296 SKIP_WHITE_SPACE (bp);
5298 /* Loop over macro argument names. */
5299 while (*bp != ')') {
5300 struct arglist *temp;
5302 temp = (struct arglist *) alloca (sizeof (struct arglist));
5304 temp->next = arg_ptrs;
5305 temp->argno = argno++;
5306 temp->rest_args = 0;
5310 pedwarn ("another parameter follows `%s'",
5313 if (!is_idstart[*bp])
5314 pedwarn ("invalid character in macro parameter name");
5316 /* Find the end of the arg name. */
5317 while (is_idchar[*bp]) {
5319 /* do we have a "special" rest-args extension here? */
5320 if (limit - bp > REST_EXTENSION_LENGTH &&
5321 strncmp (rest_extension, bp, REST_EXTENSION_LENGTH) == 0) {
5323 temp->rest_args = 1;
5327 temp->length = bp - temp->name;
5329 bp += REST_EXTENSION_LENGTH;
5330 arglengths += temp->length + 2;
5331 SKIP_WHITE_SPACE (bp);
5332 if (temp->length == 0 || (*bp != ',' && *bp != ')')) {
5333 error ("badly punctuated parameter list in `#define'");
5338 SKIP_WHITE_SPACE (bp);
5341 error ("unterminated parameter list in `#define'");
5345 struct arglist *otemp;
5347 for (otemp = temp->next; otemp != NULL; otemp = otemp->next)
5348 if (temp->length == otemp->length &&
5349 strncmp (temp->name, otemp->name, temp->length) == 0) {
5352 name = (U_CHAR *) alloca (temp->length + 1);
5353 (void) strncpy (name, temp->name, temp->length);
5354 name[temp->length] = '\0';
5355 error ("duplicate argument name `%s' in `#define'", name);
5361 ++bp; /* skip paren */
5362 /* Skip spaces and tabs if any. */
5363 while (bp < limit && (*bp == ' ' || *bp == '\t'))
5365 /* now everything from bp before limit is the definition. */
5366 defn = collect_expansion (bp, limit, argno, arg_ptrs);
5367 defn->rest_args = rest_args;
5369 /* Now set defn->args.argnames to the result of concatenating
5370 the argument names in reverse order
5371 with comma-space between them. */
5372 defn->args.argnames = (U_CHAR *) xmalloc (arglengths + 1);
5374 struct arglist *temp;
5376 for (temp = arg_ptrs; temp; temp = temp->next) {
5377 bcopy (temp->name, &defn->args.argnames[i], temp->length);
5379 if (temp->next != 0) {
5380 defn->args.argnames[i++] = ',';
5381 defn->args.argnames[i++] = ' ';
5384 defn->args.argnames[i] = 0;
5387 /* Simple expansion or empty definition. */
5393 case '\t': case ' ':
5394 /* Skip spaces and tabs. */
5395 while (++bp < limit && (*bp == ' ' || *bp == '\t'))
5399 case '!': case '"': case '#': case '%': case '&': case '\'':
5400 case ')': case '*': case '+': case ',': case '-': case '.':
5401 case '/': case ':': case ';': case '<': case '=': case '>':
5402 case '?': case '[': case '\\': case ']': case '^': case '{':
5403 case '|': case '}': case '~':
5404 warning ("missing white space after `#define %.*s'",
5405 sym_length, symname);
5409 pedwarn ("missing white space after `#define %.*s'",
5410 sym_length, symname);
5414 /* Now everything from bp before limit is the definition. */
5415 defn = collect_expansion (bp, limit, -1, NULL_PTR);
5416 defn->args.argnames = (U_CHAR *) "";
5422 /* OP is null if this is a predefinition */
5423 defn->predefined = !op;
5425 mdef.symnam = symname;
5426 mdef.symlen = sym_length;
5435 /* Process a #define command.
5436 BUF points to the contents of the #define command, as a contiguous string.
5437 LIMIT points to the first character past the end of the definition.
5438 KEYWORD is the keyword-table entry for #define. */
5441 do_define (buf, limit, op, keyword)
5442 U_CHAR *buf, *limit;
5444 struct directive *keyword;
5449 /* If this is a precompiler run (with -pcp) pass thru #define commands. */
5450 if (pcp_outfile && op)
5451 pass_thru_directive (buf, limit, op, keyword);
5453 mdef = create_definition (buf, limit, op);
5457 hashcode = hashf (mdef.symnam, mdef.symlen, HASHSIZE);
5461 if ((hp = lookup (mdef.symnam, mdef.symlen, hashcode)) != NULL) {
5463 /* Redefining a precompiled key is ok. */
5464 if (hp->type == T_PCSTRING)
5466 /* Redefining a macro is ok if the definitions are the same. */
5467 else if (hp->type == T_MACRO)
5468 ok = ! compare_defs (mdef.defn, hp->value.defn);
5469 /* Redefining a constant is ok with -D. */
5470 else if (hp->type == T_CONST)
5471 ok = ! done_initializing;
5472 /* Print the warning if it's not ok. */
5474 U_CHAR *msg; /* what pain... */
5476 /* If we are passing through #define and #undef directives, do
5477 that for this re-definition now. */
5478 if (debug_output && op)
5479 pass_thru_directive (buf, limit, op, keyword);
5481 msg = (U_CHAR *) alloca (mdef.symlen + 22);
5483 bcopy ((char *) mdef.symnam, (char *) (msg + 1), mdef.symlen);
5484 strcpy ((char *) (msg + mdef.symlen + 1), "' redefined");
5486 if (hp->type == T_MACRO)
5487 pedwarn_with_file_and_line (hp->value.defn->file, hp->value.defn->line,
5488 "this is the location of the previous definition");
5490 /* Replace the old definition. */
5492 hp->value.defn = mdef.defn;
5494 /* If we are passing through #define and #undef directives, do
5495 that for this new definition now. */
5496 if (debug_output && op)
5497 pass_thru_directive (buf, limit, op, keyword);
5498 install (mdef.symnam, mdef.symlen, T_MACRO, 0,
5499 (char *) mdef.defn, hashcode);
5510 /* Check a purported macro name SYMNAME, and yield its length.
5511 USAGE is the kind of name this is intended for. */
5514 check_macro_name (symname, usage)
5521 for (p = symname; is_idchar[*p]; p++)
5523 sym_length = p - symname;
5524 if (sym_length == 0)
5525 error ("invalid %s name", usage);
5526 else if (!is_idstart[*symname]) {
5527 U_CHAR *msg; /* what pain... */
5528 msg = (U_CHAR *) alloca (sym_length + 1);
5529 bcopy ((char *) symname, (char *) msg, sym_length);
5530 msg[sym_length] = 0;
5531 error ("invalid %s name `%s'", usage, msg);
5533 if (! strncmp (symname, "defined", 7) && sym_length == 7)
5534 error ("invalid %s name `defined'", usage);
5540 * return zero if two DEFINITIONs are isomorphic
5543 compare_defs (d1, d2)
5544 DEFINITION *d1, *d2;
5546 register struct reflist *a1, *a2;
5547 register U_CHAR *p1 = d1->expansion;
5548 register U_CHAR *p2 = d2->expansion;
5551 if (d1->nargs != d2->nargs)
5553 if (strcmp ((char *)d1->args.argnames, (char *)d2->args.argnames))
5555 for (a1 = d1->pattern, a2 = d2->pattern; a1 && a2;
5556 a1 = a1->next, a2 = a2->next) {
5557 if (!((a1->nchars == a2->nchars && ! strncmp (p1, p2, a1->nchars))
5558 || ! comp_def_part (first, p1, a1->nchars, p2, a2->nchars, 0))
5559 || a1->argno != a2->argno
5560 || a1->stringify != a2->stringify
5561 || a1->raw_before != a2->raw_before
5562 || a1->raw_after != a2->raw_after)
5570 if (comp_def_part (first, p1, d1->length - (p1 - d1->expansion),
5571 p2, d2->length - (p2 - d2->expansion), 1))
5576 /* Return 1 if two parts of two macro definitions are effectively different.
5577 One of the parts starts at BEG1 and has LEN1 chars;
5578 the other has LEN2 chars at BEG2.
5579 Any sequence of whitespace matches any other sequence of whitespace.
5580 FIRST means these parts are the first of a macro definition;
5581 so ignore leading whitespace entirely.
5582 LAST means these parts are the last of a macro definition;
5583 so ignore trailing whitespace entirely. */
5586 comp_def_part (first, beg1, len1, beg2, len2, last)
5588 U_CHAR *beg1, *beg2;
5592 register U_CHAR *end1 = beg1 + len1;
5593 register U_CHAR *end2 = beg2 + len2;
5595 while (beg1 != end1 && is_space[*beg1]) beg1++;
5596 while (beg2 != end2 && is_space[*beg2]) beg2++;
5599 while (beg1 != end1 && is_space[end1[-1]]) end1--;
5600 while (beg2 != end2 && is_space[end2[-1]]) end2--;
5602 while (beg1 != end1 && beg2 != end2) {
5603 if (is_space[*beg1] && is_space[*beg2]) {
5604 while (beg1 != end1 && is_space[*beg1]) beg1++;
5605 while (beg2 != end2 && is_space[*beg2]) beg2++;
5606 } else if (*beg1 == *beg2) {
5610 return (beg1 != end1) || (beg2 != end2);
5613 /* Read a replacement list for a macro with parameters.
5614 Build the DEFINITION structure.
5615 Reads characters of text starting at BUF until END.
5616 ARGLIST specifies the formal parameters to look for
5617 in the text of the definition; NARGS is the number of args
5618 in that list, or -1 for a macro name that wants no argument list.
5619 MACRONAME is the macro name itself (so we can avoid recursive expansion)
5620 and NAMELEN is its length in characters.
5622 Note that comments and backslash-newlines have already been deleted
5623 from the argument. */
5625 /* Leading and trailing Space, Tab, etc. are converted to markers
5626 Newline Space, Newline Tab, etc.
5627 Newline Space makes a space in the final output
5628 but is discarded if stringified. (Newline Tab is similar but
5629 makes a Tab instead.)
5631 If there is no trailing whitespace, a Newline Space is added at the end
5632 to prevent concatenation that would be contrary to the standard. */
5635 collect_expansion (buf, end, nargs, arglist)
5638 struct arglist *arglist;
5641 register U_CHAR *p, *limit, *lastp, *exp_p;
5642 struct reflist *endpat = NULL;
5643 /* Pointer to first nonspace after last ## seen. */
5645 /* Pointer to first nonspace after last single-# seen. */
5646 U_CHAR *stringify = 0;
5648 int expected_delimiter = '\0';
5650 /* Scan thru the replacement list, ignoring comments and quoted
5651 strings, picking up on the macro calls. It does a linear search
5652 thru the arg list on every potential symbol. Profiling might say
5653 that something smarter should happen. */
5658 /* Find the beginning of the trailing whitespace. */
5659 /* Find end of leading whitespace. */
5662 while (p < limit && is_space[limit[-1]]) limit--;
5663 while (p < limit && is_space[*p]) p++;
5665 /* Allocate space for the text in the macro definition.
5666 Leading and trailing whitespace chars need 2 bytes each.
5667 Each other input char may or may not need 1 byte,
5668 so this is an upper bound.
5669 The extra 2 are for invented trailing newline-marker and final null. */
5670 maxsize = (sizeof (DEFINITION)
5671 + 2 * (end - limit) + 2 * (p - buf)
5673 defn = (DEFINITION *) xcalloc (1, maxsize);
5675 defn->nargs = nargs;
5676 exp_p = defn->expansion = (U_CHAR *) defn + sizeof (DEFINITION);
5681 /* Convert leading whitespace to Newline-markers. */
5682 while (p < limit && is_space[*p]) {
5687 if (limit - p >= 2 && p[0] == '#' && p[1] == '#') {
5688 error ("`##' at start of macro definition");
5692 /* Process the main body of the definition. */
5694 int skipped_arg = 0;
5695 register U_CHAR c = *p++;
5703 if (expected_delimiter != '\0') {
5704 if (c == expected_delimiter)
5705 expected_delimiter = '\0';
5707 expected_delimiter = c;
5710 /* Special hack: if a \# is written in the #define
5711 include a # in the definition. This is useless for C code
5712 but useful for preprocessing other things. */
5715 /* \# quotes a # even outside of strings. */
5716 if (p < limit && *p == '#' && !expected_delimiter) {
5719 } else if (p < limit && expected_delimiter) {
5720 /* In a string, backslash goes through
5721 and makes next char ordinary. */
5727 /* # is ordinary inside a string. */
5728 if (expected_delimiter)
5730 if (p < limit && *p == '#') {
5731 /* ##: concatenate preceding and following tokens. */
5732 /* Take out the first #, discard preceding whitespace. */
5734 while (exp_p > lastp && is_hor_space[exp_p[-1]])
5736 /* Skip the second #. */
5738 /* Discard following whitespace. */
5739 SKIP_WHITE_SPACE (p);
5742 error ("`##' at end of macro definition");
5743 } else if (nargs >= 0) {
5744 /* Single #: stringify following argument ref.
5745 Don't leave the # in the expansion. */
5747 SKIP_WHITE_SPACE (p);
5748 if (p == limit || ! is_idstart[*p])
5749 error ("`#' operator is not followed by a macro argument name");
5756 /* In -traditional mode, recognize arguments inside strings and
5757 and character constants, and ignore special properties of #.
5758 Arguments inside strings are considered "stringified", but no
5759 extra quote marks are supplied. */
5763 if (expected_delimiter != '\0') {
5764 if (c == expected_delimiter)
5765 expected_delimiter = '\0';
5767 expected_delimiter = c;
5771 /* Backslash quotes delimiters and itself, but not macro args. */
5772 if (expected_delimiter != 0 && p < limit
5773 && (*p == expected_delimiter || *p == '\\')) {
5780 if (expected_delimiter != '\0') /* No comments inside strings. */
5783 /* If we find a comment that wasn't removed by handle_directive,
5784 this must be -traditional. So replace the comment with
5788 while (p < limit && !(p[-2] == '*' && p[-1] == '/'))
5791 /* Mark this as a concatenation-point, as if it had been ##. */
5799 /* Handle the start of a symbol. */
5800 if (is_idchar[c] && nargs > 0) {
5801 U_CHAR *id_beg = p - 1;
5805 while (p != limit && is_idchar[*p]) p++;
5806 id_len = p - id_beg;
5808 if (is_idstart[c]) {
5809 register struct arglist *arg;
5811 for (arg = arglist; arg != NULL; arg = arg->next) {
5812 struct reflist *tpat;
5814 if (arg->name[0] == c
5815 && arg->length == id_len
5816 && strncmp (arg->name, id_beg, id_len) == 0) {
5817 if (expected_delimiter && warn_stringify) {
5819 warning ("macro argument `%.*s' is stringified.",
5822 warning ("macro arg `%.*s' would be stringified with -traditional.",
5826 /* If ANSI, don't actually substitute inside a string. */
5827 if (!traditional && expected_delimiter)
5829 /* make a pat node for this arg and append it to the end of
5831 tpat = (struct reflist *) xmalloc (sizeof (struct reflist));
5833 tpat->raw_before = concat == id_beg;
5834 tpat->raw_after = 0;
5835 tpat->rest_args = arg->rest_args;
5836 tpat->stringify = (traditional ? expected_delimiter != '\0'
5837 : stringify == id_beg);
5840 defn->pattern = tpat;
5842 endpat->next = tpat;
5845 tpat->argno = arg->argno;
5846 tpat->nchars = exp_p - lastp;
5848 register U_CHAR *p1 = p;
5849 SKIP_WHITE_SPACE (p1);
5850 if (p1 + 2 <= limit && p1[0] == '#' && p1[1] == '#')
5851 tpat->raw_after = 1;
5853 lastp = exp_p; /* place to start copying from next time */
5860 /* If this was not a macro arg, copy it into the expansion. */
5861 if (! skipped_arg) {
5862 register U_CHAR *lim1 = p;
5866 if (stringify == id_beg)
5867 error ("`#' operator should be followed by a macro argument name");
5872 if (!traditional && expected_delimiter == 0) {
5873 /* There is no trailing whitespace, so invent some in ANSI mode.
5874 But not if "inside a string" (which in ANSI mode
5875 happens only for -D option). */
5882 defn->length = exp_p - defn->expansion;
5884 /* Crash now if we overrun the allocated size. */
5885 if (defn->length + 1 > maxsize)
5889 /* This isn't worth the time it takes. */
5890 /* give back excess storage */
5891 defn->expansion = (U_CHAR *) xrealloc (defn->expansion, defn->length + 1);
5898 do_assert (buf, limit, op, keyword)
5899 U_CHAR *buf, *limit;
5901 struct directive *keyword;
5903 U_CHAR *bp; /* temp ptr into input buffer */
5904 U_CHAR *symname; /* remember where symbol name starts */
5905 int sym_length; /* and how long it is */
5906 struct arglist *tokens = NULL;
5908 if (pedantic && done_initializing && !instack[indepth].system_header_p)
5909 pedwarn ("ANSI C does not allow `#assert'");
5913 while (is_hor_space[*bp])
5916 symname = bp; /* remember where it starts */
5917 sym_length = check_macro_name (bp, "assertion");
5919 /* #define doesn't do this, but we should. */
5920 SKIP_WHITE_SPACE (bp);
5922 /* Lossage will occur if identifiers or control tokens are broken
5923 across lines using backslash. This is not the right place to take
5927 error ("missing token-sequence in `#assert'");
5934 bp++; /* skip '(' */
5935 SKIP_WHITE_SPACE (bp);
5937 tokens = read_token_list (&bp, limit, &error_flag);
5941 error ("empty token-sequence in `#assert'");
5945 ++bp; /* skip paren */
5946 SKIP_WHITE_SPACE (bp);
5949 /* If this name isn't already an assertion name, make it one.
5950 Error if it was already in use in some other way. */
5953 ASSERTION_HASHNODE *hp;
5954 int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE);
5955 struct tokenlist_list *value
5956 = (struct tokenlist_list *) xmalloc (sizeof (struct tokenlist_list));
5958 hp = assertion_lookup (symname, sym_length, hashcode);
5960 if (sym_length == 7 && ! strncmp (symname, "defined", sym_length))
5961 error ("`defined' redefined as assertion");
5962 hp = assertion_install (symname, sym_length, hashcode);
5965 /* Add the spec'd token-sequence to the list of such. */
5966 value->tokens = tokens;
5967 value->next = hp->value;
5975 do_unassert (buf, limit, op, keyword)
5976 U_CHAR *buf, *limit;
5978 struct directive *keyword;
5980 U_CHAR *bp; /* temp ptr into input buffer */
5981 U_CHAR *symname; /* remember where symbol name starts */
5982 int sym_length; /* and how long it is */
5984 struct arglist *tokens = NULL;
5985 int tokens_specified = 0;
5987 if (pedantic && done_initializing && !instack[indepth].system_header_p)
5988 pedwarn ("ANSI C does not allow `#unassert'");
5992 while (is_hor_space[*bp])
5995 symname = bp; /* remember where it starts */
5996 sym_length = check_macro_name (bp, "assertion");
5998 /* #define doesn't do this, but we should. */
5999 SKIP_WHITE_SPACE (bp);
6001 /* Lossage will occur if identifiers or control tokens are broken
6002 across lines using backslash. This is not the right place to take
6008 bp++; /* skip '(' */
6009 SKIP_WHITE_SPACE (bp);
6011 tokens = read_token_list (&bp, limit, &error_flag);
6015 error ("empty token list in `#unassert'");
6019 tokens_specified = 1;
6021 ++bp; /* skip paren */
6022 SKIP_WHITE_SPACE (bp);
6026 ASSERTION_HASHNODE *hp;
6027 int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE);
6028 struct tokenlist_list *tail, *prev;
6030 hp = assertion_lookup (symname, sym_length, hashcode);
6034 /* If no token list was specified, then eliminate this assertion
6036 if (! tokens_specified) {
6037 struct tokenlist_list *next;
6038 for (tail = hp->value; tail; tail = next) {
6040 free_token_list (tail->tokens);
6043 delete_assertion (hp);
6045 /* If a list of tokens was given, then delete any matching list. */
6050 struct tokenlist_list *next = tail->next;
6051 if (compare_token_lists (tail->tokens, tokens)) {
6055 hp->value = tail->next;
6056 free_token_list (tail->tokens);
6069 /* Test whether there is an assertion named NAME
6070 and optionally whether it has an asserted token list TOKENS.
6071 NAME is not null terminated; its length is SYM_LENGTH.
6072 If TOKENS_SPECIFIED is 0, then don't check for any token list. */
6075 check_assertion (name, sym_length, tokens_specified, tokens)
6078 int tokens_specified;
6079 struct arglist *tokens;
6081 ASSERTION_HASHNODE *hp;
6082 int hashcode = hashf (name, sym_length, ASSERTION_HASHSIZE);
6084 if (pedantic && !instack[indepth].system_header_p)
6085 pedwarn ("ANSI C does not allow testing assertions");
6087 hp = assertion_lookup (name, sym_length, hashcode);
6089 /* It is not an assertion; just return false. */
6092 /* If no token list was specified, then value is 1. */
6093 if (! tokens_specified)
6097 struct tokenlist_list *tail;
6101 /* If a list of tokens was given,
6102 then succeed if the assertion records a matching list. */
6105 if (compare_token_lists (tail->tokens, tokens))
6110 /* Fail if the assertion has no matching list. */
6115 /* Compare two lists of tokens for equality including order of tokens. */
6118 compare_token_lists (l1, l2)
6119 struct arglist *l1, *l2;
6122 if (l1->length != l2->length)
6124 if (strncmp (l1->name, l2->name, l1->length))
6130 /* Succeed if both lists end at the same time. */
6134 /* Read a space-separated list of tokens ending in a close parenthesis.
6135 Return a list of strings, in the order they were written.
6136 (In case of error, return 0 and store -1 in *ERROR_FLAG.)
6137 Parse the text starting at *BPP, and update *BPP.
6138 Don't parse beyond LIMIT. */
6140 static struct arglist *
6141 read_token_list (bpp, limit, error_flag)
6146 struct arglist *token_ptrs = 0;
6152 /* Loop over the assertion value tokens. */
6154 struct arglist *temp;
6158 /* Find the end of the token. */
6162 } else if (*bp == ')') {
6167 } else if (*bp == '"' || *bp == '\'')
6168 bp = skip_quoted_string (bp, limit, 0, NULL_PTR, NULL_PTR, &eofp);
6170 while (! is_hor_space[*bp] && *bp != '(' && *bp != ')'
6171 && *bp != '"' && *bp != '\'' && bp != limit)
6174 temp = (struct arglist *) xmalloc (sizeof (struct arglist));
6175 temp->name = (U_CHAR *) xmalloc (bp - beg + 1);
6176 bcopy ((char *) beg, (char *) temp->name, bp - beg);
6177 temp->name[bp - beg] = 0;
6178 temp->next = token_ptrs;
6180 temp->length = bp - beg;
6182 SKIP_WHITE_SPACE (bp);
6185 error ("unterminated token sequence in `#assert' or `#unassert'");
6192 /* We accumulated the names in reverse order.
6193 Now reverse them to get the proper order. */
6195 register struct arglist *prev = 0, *this, *next;
6196 for (this = token_ptrs; this; this = next) {
6206 free_token_list (tokens)
6207 struct arglist *tokens;
6210 struct arglist *next = tokens->next;
6211 free (tokens->name);
6218 * Install a name in the assertion hash table.
6220 * If LEN is >= 0, it is the length of the name.
6221 * Otherwise, compute the length by scanning the entire name.
6223 * If HASH is >= 0, it is the precomputed hash code.
6224 * Otherwise, compute the hash code.
6226 static ASSERTION_HASHNODE *
6227 assertion_install (name, len, hash)
6232 register ASSERTION_HASHNODE *hp;
6233 register int i, bucket;
6234 register U_CHAR *p, *q;
6236 i = sizeof (ASSERTION_HASHNODE) + len + 1;
6237 hp = (ASSERTION_HASHNODE *) xmalloc (i);
6239 hp->bucket_hdr = &assertion_hashtab[bucket];
6240 hp->next = assertion_hashtab[bucket];
6241 assertion_hashtab[bucket] = hp;
6243 if (hp->next != NULL)
6244 hp->next->prev = hp;
6247 hp->name = ((U_CHAR *) hp) + sizeof (ASSERTION_HASHNODE);
6250 for (i = 0; i < len; i++)
6257 * find the most recent hash node for name name (ending with first
6258 * non-identifier char) installed by install
6260 * If LEN is >= 0, it is the length of the name.
6261 * Otherwise, compute the length by scanning the entire name.
6263 * If HASH is >= 0, it is the precomputed hash code.
6264 * Otherwise, compute the hash code.
6266 static ASSERTION_HASHNODE *
6267 assertion_lookup (name, len, hash)
6272 register ASSERTION_HASHNODE *bucket;
6274 bucket = assertion_hashtab[hash];
6276 if (bucket->length == len && strncmp (bucket->name, name, len) == 0)
6278 bucket = bucket->next;
6284 delete_assertion (hp)
6285 ASSERTION_HASHNODE *hp;
6288 if (hp->prev != NULL)
6289 hp->prev->next = hp->next;
6290 if (hp->next != NULL)
6291 hp->next->prev = hp->prev;
6293 /* make sure that the bucket chain header that
6294 the deleted guy was on points to the right thing afterwards. */
6295 if (hp == *hp->bucket_hdr)
6296 *hp->bucket_hdr = hp->next;
6302 * interpret #line command. Remembers previously seen fnames
6303 * in its very own hash table.
6305 #define FNAME_HASHSIZE 37
6308 do_line (buf, limit, op, keyword)
6309 U_CHAR *buf, *limit;
6311 struct directive *keyword;
6313 register U_CHAR *bp;
6314 FILE_BUF *ip = &instack[indepth];
6317 enum file_change_code file_change = same_file;
6319 /* Expand any macros. */
6320 tem = expand_to_temp_buffer (buf, limit, 0, 0);
6322 /* Point to macroexpanded line, which is null-terminated now. */
6324 SKIP_WHITE_SPACE (bp);
6326 if (!isdigit (*bp)) {
6327 error ("invalid format `#line' command");
6331 /* The Newline at the end of this line remains to be processed.
6332 To put the next line at the specified line number,
6333 we must store a line number now that is one less. */
6334 new_lineno = atoi (bp) - 1;
6336 /* NEW_LINENO is one less than the actual line number here. */
6337 if (pedantic && new_lineno < 0)
6338 pedwarn ("line number out of range in `#line' command");
6340 /* skip over the line number. */
6341 while (isdigit (*bp))
6344 #if 0 /* #line 10"foo.c" is supposed to be allowed. */
6345 if (*bp && !is_space[*bp]) {
6346 error ("invalid format `#line' command");
6351 SKIP_WHITE_SPACE (bp);
6354 static HASHNODE *fname_table[FNAME_HASHSIZE];
6355 HASHNODE *hp, **hash_bucket;
6361 /* Turn the file name, which is a character string literal,
6362 into a null-terminated string. Do this in place. */
6365 switch ((*p++ = *bp++)) {
6367 error ("invalid format `#line' command");
6372 char *bpc = (char *) bp;
6373 int c = parse_escape (&bpc);
6374 bp = (U_CHAR *) bpc;
6387 fname_length = p - fname;
6389 SKIP_WHITE_SPACE (bp);
6392 pedwarn ("garbage at end of `#line' command");
6394 file_change = enter_file;
6395 else if (*bp == '2')
6396 file_change = leave_file;
6397 else if (*bp == '3')
6398 ip->system_header_p = 1;
6399 else if (*bp == '4')
6400 ip->system_header_p = 2;
6402 error ("invalid format `#line' command");
6407 SKIP_WHITE_SPACE (bp);
6409 ip->system_header_p = 1;
6411 SKIP_WHITE_SPACE (bp);
6414 ip->system_header_p = 2;
6416 SKIP_WHITE_SPACE (bp);
6419 error ("invalid format `#line' command");
6425 &fname_table[hashf (fname, fname_length, FNAME_HASHSIZE)];
6426 for (hp = *hash_bucket; hp != NULL; hp = hp->next)
6427 if (hp->length == fname_length &&
6428 strncmp (hp->value.cpval, fname, fname_length) == 0) {
6429 ip->nominal_fname = hp->value.cpval;
6433 /* Didn't find it; cons up a new one. */
6434 hp = (HASHNODE *) xcalloc (1, sizeof (HASHNODE) + fname_length + 1);
6435 hp->next = *hash_bucket;
6438 hp->length = fname_length;
6439 ip->nominal_fname = hp->value.cpval = ((char *) hp) + sizeof (HASHNODE);
6440 bcopy (fname, hp->value.cpval, fname_length);
6443 error ("invalid format `#line' command");
6447 ip->lineno = new_lineno;
6448 output_line_command (ip, op, 0, file_change);
6449 check_expand (op, ip->length - (ip->bufp - ip->buf));
6454 * remove the definition of a symbol from the symbol table.
6455 * according to un*x /lib/cpp, it is not an error to undef
6456 * something that has no definitions, so it isn't one here either.
6460 do_undef (buf, limit, op, keyword)
6461 U_CHAR *buf, *limit;
6463 struct directive *keyword;
6467 U_CHAR *orig_buf = buf;
6469 /* If this is a precompiler run (with -pcp) pass thru #undef commands. */
6470 if (pcp_outfile && op)
6471 pass_thru_directive (buf, limit, op, keyword);
6473 SKIP_WHITE_SPACE (buf);
6474 sym_length = check_macro_name (buf, "macro");
6476 while ((hp = lookup (buf, sym_length, -1)) != NULL) {
6477 /* If we are generating additional info for debugging (with -g) we
6478 need to pass through all effective #undef commands. */
6479 if (debug_output && op)
6480 pass_thru_directive (orig_buf, limit, op, keyword);
6481 if (hp->type != T_MACRO)
6482 warning ("undefining `%s'", hp->name);
6488 SKIP_WHITE_SPACE (buf);
6490 pedwarn ("garbage after `#undef' directive");
6496 * Report an error detected by the program we are processing.
6497 * Use the text of the line in the error message.
6498 * (We use error because it prints the filename & line#.)
6502 do_error (buf, limit, op, keyword)
6503 U_CHAR *buf, *limit;
6505 struct directive *keyword;
6507 int length = limit - buf;
6508 U_CHAR *copy = (U_CHAR *) xmalloc (length + 1);
6509 bcopy ((char *) buf, (char *) copy, length);
6511 SKIP_WHITE_SPACE (copy);
6512 error ("#error %s", copy);
6517 * Report a warning detected by the program we are processing.
6518 * Use the text of the line in the warning message, then continue.
6519 * (We use error because it prints the filename & line#.)
6523 do_warning (buf, limit, op, keyword)
6524 U_CHAR *buf, *limit;
6526 struct directive *keyword;
6528 int length = limit - buf;
6529 U_CHAR *copy = (U_CHAR *) xmalloc (length + 1);
6530 bcopy ((char *) buf, (char *) copy, length);
6532 SKIP_WHITE_SPACE (copy);
6533 warning ("#warning %s", copy);
6537 /* Remember the name of the current file being read from so that we can
6538 avoid ever including it again. */
6544 FILE_BUF *ip = NULL;
6546 for (i = indepth; i >= 0; i--)
6547 if (instack[i].fname != NULL) {
6553 struct file_name_list *new;
6555 new = (struct file_name_list *) xmalloc (sizeof (struct file_name_list));
6556 new->next = dont_repeat_files;
6557 dont_repeat_files = new;
6558 new->fname = savestring (ip->fname);
6559 new->control_macro = 0;
6560 new->got_name_map = 0;
6561 new->c_system_include_path = 0;
6566 /* #ident has already been copied to the output file, so just ignore it. */
6569 do_ident (buf, limit)
6570 U_CHAR *buf, *limit;
6574 FILE_BUF *op = &outbuf;
6576 /* Allow #ident in system headers, since that's not user's fault. */
6577 if (pedantic && !instack[indepth].system_header_p)
6578 pedwarn ("ANSI C does not allow `#ident'");
6580 trybuf = expand_to_temp_buffer (buf, limit, 0, 0);
6581 buf = (U_CHAR *) alloca (trybuf.bufp - trybuf.buf + 1);
6582 bcopy ((char *) trybuf.buf, (char *) buf, trybuf.bufp - trybuf.buf);
6583 limit = buf + (trybuf.bufp - trybuf.buf);
6584 len = (limit - buf);
6587 /* Output directive name. */
6588 check_expand (op, 8);
6589 bcopy ("#ident ", (char *) op->bufp, 7);
6592 /* Output the expanded argument line. */
6593 check_expand (op, len);
6594 bcopy ((char *) buf, (char *) op->bufp, len);
6600 /* #pragma and its argument line have already been copied to the output file.
6601 Just check for some recognized pragmas that need validation here. */
6604 do_pragma (buf, limit)
6605 U_CHAR *buf, *limit;
6607 while (*buf == ' ' || *buf == '\t')
6609 if (!strncmp (buf, "once", 4)) {
6610 /* Allow #pragma once in system headers, since that's not the user's
6612 if (!instack[indepth].system_header_p)
6613 warning ("`#pragma once' is obsolete");
6617 if (!strncmp (buf, "implementation", 14)) {
6618 /* Be quiet about `#pragma implementation' for a file only if it hasn't
6619 been included yet. */
6620 struct file_name_list *ptr;
6621 U_CHAR *p = buf + 14, *fname, *inc_fname;
6622 SKIP_WHITE_SPACE (p);
6623 if (*p == '\n' || *p != '\"')
6627 if (p = (U_CHAR *) index (fname, '\"'))
6630 for (ptr = all_include_files; ptr; ptr = ptr->next) {
6631 inc_fname = (U_CHAR *) rindex (ptr->fname, '/');
6632 inc_fname = inc_fname ? inc_fname + 1 : (U_CHAR *) ptr->fname;
6633 if (inc_fname && !strcmp (inc_fname, fname))
6634 warning ("`#pragma implementation' for `%s' appears after file is included",
6643 /* This was a fun hack, but #pragma seems to start to be useful.
6644 By failing to recognize it, we pass it through unchanged to cc1. */
6647 * the behavior of the #pragma directive is implementation defined.
6648 * this implementation defines it as follows.
6655 if (open ("/dev/tty", O_RDONLY, 0666) != 0)
6658 if (open ("/dev/tty", O_WRONLY, 0666) != 1)
6660 execl ("/usr/games/hack", "#pragma", 0);
6661 execl ("/usr/games/rogue", "#pragma", 0);
6662 execl ("/usr/new/emacs", "-f", "hanoi", "9", "-kill", 0);
6663 execl ("/usr/local/emacs", "-f", "hanoi", "9", "-kill", 0);
6665 fatal ("You are in a maze of twisty compiler features, all different");
6669 /* Just ignore #sccs, on systems where we define it at all. */
6675 pedwarn ("ANSI C does not allow `#sccs'");
6680 * handle #if command by
6681 * 1) inserting special `defined' keyword into the hash table
6682 * that gets turned into 0 or 1 by special_symbol (thus,
6683 * if the luser has a symbol called `defined' already, it won't
6684 * work inside the #if command)
6685 * 2) rescan the input into a temporary output buffer
6686 * 3) pass the output buffer to the yacc parser and collect a value
6687 * 4) clean up the mess left from steps 1 and 2.
6688 * 5) call conditional_skip to skip til the next #endif (etc.),
6689 * or not, depending on the value from step 3.
6693 do_if (buf, limit, op, keyword)
6694 U_CHAR *buf, *limit;
6696 struct directive *keyword;
6699 FILE_BUF *ip = &instack[indepth];
6701 value = eval_if_expression (buf, limit - buf);
6702 conditional_skip (ip, value == 0, T_IF, NULL_PTR, op);
6707 * handle a #elif directive by not changing if_stack either.
6708 * see the comment above do_else.
6712 do_elif (buf, limit, op, keyword)
6713 U_CHAR *buf, *limit;
6715 struct directive *keyword;
6718 FILE_BUF *ip = &instack[indepth];
6720 if (if_stack == instack[indepth].if_stack) {
6721 error ("`#elif' not within a conditional");
6724 if (if_stack->type != T_IF && if_stack->type != T_ELIF) {
6725 error ("`#elif' after `#else'");
6726 fprintf (stderr, " (matches line %d", if_stack->lineno);
6727 if (if_stack->fname != NULL && ip->fname != NULL &&
6728 strcmp (if_stack->fname, ip->nominal_fname) != 0)
6729 fprintf (stderr, ", file %s", if_stack->fname);
6730 fprintf (stderr, ")\n");
6732 if_stack->type = T_ELIF;
6735 if (if_stack->if_succeeded)
6736 skip_if_group (ip, 0, op);
6738 value = eval_if_expression (buf, limit - buf);
6740 skip_if_group (ip, 0, op);
6742 ++if_stack->if_succeeded; /* continue processing input */
6743 output_line_command (ip, op, 1, same_file);
6750 * evaluate a #if expression in BUF, of length LENGTH,
6751 * then parse the result as a C expression and return the value as an int.
6754 eval_if_expression (buf, length)
6759 HASHNODE *save_defined;
6762 save_defined = install ("defined", -1, T_SPEC_DEFINED, 0, 0, -1);
6764 temp_obuf = expand_to_temp_buffer (buf, buf + length, 0, 1);
6766 delete_macro (save_defined); /* clean up special symbol */
6768 value = parse_c_expression (temp_obuf.buf);
6770 free (temp_obuf.buf);
6776 * routine to handle ifdef/ifndef. Try to look up the symbol,
6777 * then do or don't skip to the #endif/#else/#elif depending
6778 * on what directive is actually being processed.
6782 do_xifdef (buf, limit, op, keyword)
6783 U_CHAR *buf, *limit;
6785 struct directive *keyword;
6788 FILE_BUF *ip = &instack[indepth];
6790 int start_of_file = 0;
6791 U_CHAR *control_macro = 0;
6793 /* Detect a #ifndef at start of file (not counting comments). */
6794 if (ip->fname != 0 && keyword->type == T_IFNDEF) {
6795 U_CHAR *p = ip->buf;
6796 while (p != directive_start) {
6800 else if (c == '/' && p != ip->bufp && *p == '*') {
6801 /* Skip this comment. */
6803 U_CHAR *save_bufp = ip->bufp;
6805 p = skip_to_end_of_comment (ip, &junk, 1);
6806 ip->bufp = save_bufp;
6811 /* If we get here, this conditional is the beginning of the file. */
6816 /* Discard leading and trailing whitespace. */
6817 SKIP_WHITE_SPACE (buf);
6818 while (limit != buf && is_hor_space[limit[-1]]) limit--;
6820 /* Find the end of the identifier at the beginning. */
6821 for (end = buf; is_idchar[*end]; end++);
6824 skip = (keyword->type == T_IFDEF);
6826 pedwarn (end == limit ? "`#%s' with no argument"
6827 : "`#%s' argument starts with punctuation",
6832 if (pedantic && buf[0] >= '0' && buf[0] <= '9')
6833 pedwarn ("`#%s' argument starts with a digit", keyword->name);
6834 else if (end != limit && !traditional)
6835 pedwarn ("garbage at end of `#%s' argument", keyword->name);
6837 hp = lookup (buf, end-buf, -1);
6840 /* Output a precondition for this macro. */
6842 (hp->type == T_CONST
6843 || (hp->type == T_MACRO && hp->value.defn->predefined)))
6844 fprintf (pcp_outfile, "#define %s\n", hp->name);
6847 fprintf (pcp_outfile, "#undef ");
6848 while (is_idchar[*cp]) /* Ick! */
6849 fputc (*cp++, pcp_outfile);
6850 putc ('\n', pcp_outfile);
6854 skip = (hp == NULL) ^ (keyword->type == T_IFNDEF);
6855 if (start_of_file && !skip) {
6856 control_macro = (U_CHAR *) xmalloc (end - buf + 1);
6857 bcopy ((char *) buf, (char *) control_macro, end - buf);
6858 control_macro[end - buf] = 0;
6862 conditional_skip (ip, skip, T_IF, control_macro, op);
6866 /* Push TYPE on stack; then, if SKIP is nonzero, skip ahead.
6867 If this is a #ifndef starting at the beginning of a file,
6868 CONTROL_MACRO is the macro name tested by the #ifndef.
6869 Otherwise, CONTROL_MACRO is 0. */
6872 conditional_skip (ip, skip, type, control_macro, op)
6875 enum node_type type;
6876 U_CHAR *control_macro;
6879 IF_STACK_FRAME *temp;
6881 temp = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME));
6882 temp->fname = ip->nominal_fname;
6883 temp->lineno = ip->lineno;
6884 temp->next = if_stack;
6885 temp->control_macro = control_macro;
6888 if_stack->type = type;
6891 skip_if_group (ip, 0, op);
6894 ++if_stack->if_succeeded;
6895 output_line_command (ip, &outbuf, 1, same_file);
6900 * skip to #endif, #else, or #elif. adjust line numbers, etc.
6901 * leaves input ptr at the sharp sign found.
6902 * If ANY is nonzero, return at next directive of any sort.
6905 skip_if_group (ip, any, op)
6910 register U_CHAR *bp = ip->bufp, *cp;
6911 register U_CHAR *endb = ip->buf + ip->length;
6912 struct directive *kt;
6913 IF_STACK_FRAME *save_if_stack = if_stack; /* don't pop past here */
6914 U_CHAR *beg_of_line = bp;
6915 register int ident_length;
6916 U_CHAR *ident, *after_ident;
6917 /* Save info about where the group starts. */
6918 U_CHAR *beg_of_group = bp;
6919 int beg_lineno = ip->lineno;
6921 if (output_conditionals && op != 0) {
6922 char *ptr = "#failed\n";
6923 int len = strlen (ptr);
6925 if (op->bufp > op->buf && op->bufp[-1] != '\n')
6930 check_expand (op, len);
6931 bcopy (ptr, (char *) op->bufp, len);
6934 output_line_command (ip, op, 1, 0);
6939 case '/': /* possible comment */
6940 if (*bp == '\\' && bp[1] == '\n')
6943 || (cplusplus_comments && *bp == '/')) {
6945 bp = skip_to_end_of_comment (ip, &ip->lineno, 0);
6950 bp = skip_quoted_string (bp - 1, endb, ip->lineno, &ip->lineno,
6951 NULL_PTR, NULL_PTR);
6954 /* Char after backslash loses its special meaning. */
6957 ++ip->lineno; /* But do update the line-count. */
6968 /* # keyword: a # must be first nonblank char on the line */
6969 if (beg_of_line == 0)
6971 /* Scan from start of line, skipping whitespace, comments
6972 and backslash-newlines, and see if we reach this #.
6973 If not, this # is not special. */
6975 /* If -traditional, require # to be at beginning of line. */
6978 if (is_hor_space[*bp])
6980 else if (*bp == '\\' && bp[1] == '\n')
6982 else if (*bp == '/' && bp[1] == '*') {
6984 while (!(*bp == '*' && bp[1] == '/'))
6988 /* There is no point in trying to deal with C++ // comments here,
6989 because if there is one, then this # must be part of the
6990 comment and we would never reach here. */
6993 if (bp != ip->bufp) {
6994 bp = ip->bufp + 1; /* Reset bp to after the #. */
6998 bp = ip->bufp + 1; /* Point after the '#' */
7000 /* Skip whitespace and \-newline. */
7002 if (is_hor_space[*bp])
7004 else if (*bp == '\\' && bp[1] == '\n')
7006 else if (*bp == '/' && bp[1] == '*') {
7008 while (!(*bp == '*' && bp[1] == '/')) {
7014 } else if (cplusplus_comments && *bp == '/' && bp[1] == '/') {
7016 while (bp[-1] == '\\' || *bp != '\n') {
7027 /* Now find end of directive name.
7028 If we encounter a backslash-newline, exchange it with any following
7029 symbol-constituents so that we end up with a contiguous name. */
7035 if (*bp == '\\' && bp[1] == '\n')
7036 name_newline_fix (bp);
7042 ident_length = bp - cp;
7046 /* A line of just `#' becomes blank. */
7048 if (ident_length == 0 && *after_ident == '\n') {
7052 if (ident_length == 0 || !is_idstart[*ident]) {
7054 while (is_idchar[*p]) {
7055 if (*p < '0' || *p > '9')
7059 /* Handle # followed by a line number. */
7060 if (p != ident && !is_idchar[*p]) {
7062 pedwarn ("`#' followed by integer");
7066 /* Avoid error for `###' and similar cases unless -pedantic. */
7068 while (*p == '#' || is_hor_space[*p]) p++;
7070 if (pedantic && !lang_asm)
7071 pedwarn ("invalid preprocessor directive");
7076 if (!lang_asm && pedantic)
7077 pedwarn ("invalid preprocessor directive name");
7081 for (kt = directive_table; kt->length >= 0; kt++) {
7082 IF_STACK_FRAME *temp;
7083 if (ident_length == kt->length
7084 && strncmp (cp, kt->name, kt->length) == 0) {
7085 /* If we are asked to return on next directive, do so now. */
7093 temp = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME));
7094 temp->next = if_stack;
7096 temp->lineno = ip->lineno;
7097 temp->fname = ip->nominal_fname;
7098 temp->type = kt->type;
7102 if (pedantic && if_stack != save_if_stack)
7105 if (if_stack == instack[indepth].if_stack) {
7106 error ("`#%s' not within a conditional", kt->name);
7109 else if (if_stack == save_if_stack)
7110 goto done; /* found what we came for */
7112 if (kt->type != T_ENDIF) {
7113 if (if_stack->type == T_ELSE)
7114 error ("`#else' or `#elif' after `#else'");
7115 if_stack->type = kt->type;
7120 if_stack = if_stack->next;
7127 /* Don't let erroneous code go by. */
7128 if (kt->length < 0 && !lang_asm && pedantic)
7129 pedwarn ("invalid preprocessor directive name");
7134 /* after this returns, rescan will exit because ip->bufp
7135 now points to the end of the buffer.
7136 rescan is responsible for the error message also. */
7139 if (output_conditionals && op != 0) {
7140 char *ptr = "#endfailed\n";
7141 int len = strlen (ptr);
7143 if (op->bufp > op->buf && op->bufp[-1] != '\n')
7148 check_expand (op, beg_of_line - beg_of_group);
7149 bcopy ((char *) beg_of_group, (char *) op->bufp,
7150 beg_of_line - beg_of_group);
7151 op->bufp += beg_of_line - beg_of_group;
7152 op->lineno += ip->lineno - beg_lineno;
7153 check_expand (op, len);
7154 bcopy (ptr, (char *) op->bufp, len);
7161 * handle a #else directive. Do this by just continuing processing
7162 * without changing if_stack ; this is so that the error message
7163 * for missing #endif's etc. will point to the original #if. It
7164 * is possible that something different would be better.
7168 do_else (buf, limit, op, keyword)
7169 U_CHAR *buf, *limit;
7171 struct directive *keyword;
7173 FILE_BUF *ip = &instack[indepth];
7176 SKIP_WHITE_SPACE (buf);
7178 pedwarn ("text following `#else' violates ANSI standard");
7181 if (if_stack == instack[indepth].if_stack) {
7182 error ("`#else' not within a conditional");
7185 /* #ifndef can't have its special treatment for containing the whole file
7186 if it has a #else clause. */
7187 if_stack->control_macro = 0;
7189 if (if_stack->type != T_IF && if_stack->type != T_ELIF) {
7190 error ("`#else' after `#else'");
7191 fprintf (stderr, " (matches line %d", if_stack->lineno);
7192 if (strcmp (if_stack->fname, ip->nominal_fname) != 0)
7193 fprintf (stderr, ", file %s", if_stack->fname);
7194 fprintf (stderr, ")\n");
7196 if_stack->type = T_ELSE;
7199 if (if_stack->if_succeeded)
7200 skip_if_group (ip, 0, op);
7202 ++if_stack->if_succeeded; /* continue processing input */
7203 output_line_command (ip, op, 1, same_file);
7209 * unstack after #endif command
7213 do_endif (buf, limit, op, keyword)
7214 U_CHAR *buf, *limit;
7216 struct directive *keyword;
7219 SKIP_WHITE_SPACE (buf);
7221 pedwarn ("text following `#endif' violates ANSI standard");
7224 if (if_stack == instack[indepth].if_stack)
7225 error ("unbalanced `#endif'");
7227 IF_STACK_FRAME *temp = if_stack;
7228 if_stack = if_stack->next;
7229 if (temp->control_macro != 0) {
7230 /* This #endif matched a #ifndef at the start of the file.
7231 See if it is at the end of the file. */
7232 FILE_BUF *ip = &instack[indepth];
7233 U_CHAR *p = ip->bufp;
7234 U_CHAR *ep = ip->buf + ip->length;
7244 if (p != ep && *p == '*') {
7245 /* Skip this comment. */
7247 U_CHAR *save_bufp = ip->bufp;
7249 p = skip_to_end_of_comment (ip, &junk, 1);
7250 ip->bufp = save_bufp;
7257 /* If we get here, this #endif ends a #ifndef
7258 that contains all of the file (aside from whitespace).
7259 Arrange not to include the file again
7260 if the macro that was tested is defined.
7262 Do not do this for the top-level file in a -include or any
7263 file in a -imacros. */
7265 && ! (indepth == 1 && no_record_file)
7266 && ! (no_record_file && no_output))
7267 record_control_macro (ip->fname, temp->control_macro);
7271 output_line_command (&instack[indepth], op, 1, same_file);
7276 /* When an #else or #endif is found while skipping failed conditional,
7277 if -pedantic was specified, this is called to warn about text after
7278 the command name. P points to the first char after the command name. */
7284 /* Advance P over whitespace and comments. */
7286 if (*p == '\\' && p[1] == '\n')
7288 if (is_hor_space[*p])
7290 else if (*p == '/') {
7291 if (p[1] == '\\' && p[2] == '\n')
7292 newline_fix (p + 1);
7295 /* Don't bother warning about unterminated comments
7296 since that will happen later. Just be sure to exit. */
7298 if (p[1] == '\\' && p[2] == '\n')
7299 newline_fix (p + 1);
7300 if (*p == '*' && p[1] == '/') {
7307 else if (cplusplus_comments && p[1] == '/') {
7309 while (*p && (*p != '\n' || p[-1] == '\\'))
7314 if (*p && *p != '\n')
7315 pedwarn ("text following `#else' or `#endif' violates ANSI standard");
7318 /* Skip a comment, assuming the input ptr immediately follows the
7319 initial slash-star. Bump *LINE_COUNTER for each newline.
7320 (The canonical line counter is &ip->lineno.)
7321 Don't use this routine (or the next one) if bumping the line
7322 counter is not sufficient to deal with newlines in the string.
7324 If NOWARN is nonzero, don't warn about slash-star inside a comment.
7325 This feature is useful when processing a comment that is going to be
7326 processed or was processed at another point in the preprocessor,
7327 to avoid a duplicate warning. Likewise for unterminated comment errors. */
7330 skip_to_end_of_comment (ip, line_counter, nowarn)
7331 register FILE_BUF *ip;
7332 int *line_counter; /* place to remember newlines, or NULL */
7335 register U_CHAR *limit = ip->buf + ip->length;
7336 register U_CHAR *bp = ip->bufp;
7337 FILE_BUF *op = &outbuf; /* JF */
7338 int output = put_out_comments && !line_counter;
7339 int start_line = line_counter ? *line_counter : 0;
7341 /* JF this line_counter stuff is a crock to make sure the
7342 comment is only put out once, no matter how many times
7343 the comment is skipped. It almost works */
7348 if (cplusplus_comments && bp[-1] == '/') {
7350 while (bp < limit) {
7352 if (*bp == '\n' && bp[-1] != '\\')
7364 while (bp < limit) {
7365 if (bp[-1] != '\\' && *bp == '\n') {
7368 if (*bp == '\n' && line_counter)
7377 while (bp < limit) {
7382 if (warn_comments && !nowarn && bp < limit && *bp == '*')
7383 warning ("`/*' within comment");
7386 /* If this is the end of the file, we have an unterminated comment.
7387 Don't swallow the newline. We are guaranteed that there will be a
7388 trailing newline and various pieces assume it's there. */
7395 if (line_counter != NULL)
7401 if (*bp == '\\' && bp[1] == '\n')
7414 error_with_line (line_for_error (start_line), "unterminated comment");
7420 * Skip over a quoted string. BP points to the opening quote.
7421 * Returns a pointer after the closing quote. Don't go past LIMIT.
7422 * START_LINE is the line number of the starting point (but it need
7423 * not be valid if the starting point is inside a macro expansion).
7425 * The input stack state is not changed.
7427 * If COUNT_NEWLINES is nonzero, it points to an int to increment
7428 * for each newline passed.
7430 * If BACKSLASH_NEWLINES_P is nonzero, store 1 thru it
7431 * if we pass a backslash-newline.
7433 * If EOFP is nonzero, set *EOFP to 1 if the string is unterminated.
7436 skip_quoted_string (bp, limit, start_line, count_newlines, backslash_newlines_p, eofp)
7437 register U_CHAR *bp;
7438 register U_CHAR *limit;
7440 int *count_newlines;
7441 int *backslash_newlines_p;
7444 register U_CHAR c, match;
7449 error_with_line (line_for_error (start_line),
7450 "unterminated string or character constant");
7451 error_with_line (multiline_string_line,
7452 "possible real start of unterminated constant");
7453 multiline_string_line = 0;
7460 while (*bp == '\\' && bp[1] == '\n') {
7461 if (backslash_newlines_p)
7462 *backslash_newlines_p = 1;
7467 if (*bp == '\n' && count_newlines) {
7468 if (backslash_newlines_p)
7469 *backslash_newlines_p = 1;
7473 } else if (c == '\n') {
7475 /* Unterminated strings and character constants are 'legal'. */
7476 bp--; /* Don't consume the newline. */
7481 if (pedantic || match == '\'') {
7482 error_with_line (line_for_error (start_line),
7483 "unterminated string or character constant");
7489 /* If not traditional, then allow newlines inside strings. */
7492 if (multiline_string_line == 0)
7493 multiline_string_line = start_line;
7494 } else if (c == match)
7500 /* Place into DST a quoted string representing the string SRC.
7501 Return the address of DST's terminating null. */
7503 quote_string (dst, src)
7510 switch ((c = *src++))
7517 sprintf (dst, "\\%03o", c);
7535 /* Skip across a group of balanced parens, starting from IP->bufp.
7536 IP->bufp is updated. Use this with IP->bufp pointing at an open-paren.
7538 This does not handle newlines, because it's used for the arg of #if,
7539 where there aren't any newlines. Also, backslash-newline can't appear. */
7542 skip_paren_group (ip)
7543 register FILE_BUF *ip;
7545 U_CHAR *limit = ip->buf + ip->length;
7546 U_CHAR *p = ip->bufp;
7548 int lines_dummy = 0;
7550 while (p != limit) {
7560 return ip->bufp = p;
7566 p = skip_to_end_of_comment (ip, &lines_dummy, 0);
7574 p = skip_quoted_string (p - 1, limit, 0, NULL_PTR, NULL_PTR, &eofp);
7576 return ip->bufp = p;
7587 * write out a #line command, for instance, after an #include file.
7588 * If CONDITIONAL is nonzero, we can omit the #line if it would
7589 * appear to be a no-op, and we can output a few newlines instead
7590 * if we want to increase the line number by a small amount.
7591 * FILE_CHANGE says whether we are entering a file, leaving, or neither.
7595 output_line_command (ip, op, conditional, file_change)
7598 enum file_change_code file_change;
7601 char *line_cmd_buf, *line_end;
7603 if (no_line_commands
7604 || ip->fname == NULL
7606 op->lineno = ip->lineno;
7611 if (ip->lineno == op->lineno)
7614 /* If the inherited line number is a little too small,
7615 output some newlines instead of a #line command. */
7616 if (ip->lineno > op->lineno && ip->lineno < op->lineno + 8) {
7617 check_expand (op, 10);
7618 while (ip->lineno > op->lineno) {
7626 /* Don't output a line number of 0 if we can help it. */
7627 if (ip->lineno == 0 && ip->bufp - ip->buf < ip->length
7628 && *ip->bufp == '\n') {
7633 line_cmd_buf = (char *) alloca (4 * strlen (ip->nominal_fname) + 100);
7634 #ifdef OUTPUT_LINE_COMMANDS
7635 sprintf (line_cmd_buf, "#line %d ", ip->lineno);
7637 sprintf (line_cmd_buf, "# %d ", ip->lineno);
7639 line_end = quote_string (line_cmd_buf + strlen (line_cmd_buf),
7641 if (file_change != same_file) {
7643 *line_end++ = file_change == enter_file ? '1' : '2';
7645 /* Tell cc1 if following text comes from a system header file. */
7646 if (ip->system_header_p) {
7650 #ifndef NO_IMPLICIT_EXTERN_C
7651 /* Tell cc1plus if following text should be treated as C. */
7652 if (ip->system_header_p == 2 && cplusplus) {
7658 len = line_end - line_cmd_buf;
7659 check_expand (op, len + 1);
7660 if (op->bufp > op->buf && op->bufp[-1] != '\n')
7662 bcopy ((char *) line_cmd_buf, (char *) op->bufp, len);
7664 op->lineno = ip->lineno;
7667 /* This structure represents one parsed argument in a macro call.
7668 `raw' points to the argument text as written (`raw_length' is its length).
7669 `expanded' points to the argument's macro-expansion
7670 (its length is `expand_length').
7671 `stringified_length' is the length the argument would have
7673 `use_count' is the number of times this macro arg is substituted
7674 into the macro. If the actual use count exceeds 10,
7675 the value stored is 10.
7676 `free1' and `free2', if nonzero, point to blocks to be freed
7677 when the macro argument data is no longer needed. */
7680 U_CHAR *raw, *expanded;
7681 int raw_length, expand_length;
7682 int stringified_length;
7683 U_CHAR *free1, *free2;
7689 /* Expand a macro call.
7690 HP points to the symbol that is the macro being called.
7691 Put the result of expansion onto the input stack
7692 so that subsequent input by our caller will use it.
7694 If macro wants arguments, caller has already verified that
7695 an argument list follows; arguments come from the input stack. */
7698 macroexpand (hp, op)
7703 DEFINITION *defn = hp->value.defn;
7704 register U_CHAR *xbuf;
7706 int start_line = instack[indepth].lineno;
7707 int rest_args, rest_zero;
7709 CHECK_DEPTH (return;);
7711 /* it might not actually be a macro. */
7712 if (hp->type != T_MACRO) {
7713 special_symbol (hp, op);
7717 /* This macro is being used inside a #if, which means it must be */
7718 /* recorded as a precondition. */
7719 if (pcp_inside_if && pcp_outfile && defn->predefined)
7720 dump_single_macro (hp, pcp_outfile);
7722 nargs = defn->nargs;
7726 struct argdata *args;
7727 char *parse_error = 0;
7729 args = (struct argdata *) alloca ((nargs + 1) * sizeof (struct argdata));
7731 for (i = 0; i < nargs; i++) {
7732 args[i].raw = (U_CHAR *) "";
7733 args[i].expanded = 0;
7734 args[i].raw_length = args[i].expand_length
7735 = args[i].stringified_length = 0;
7736 args[i].free1 = args[i].free2 = 0;
7737 args[i].use_count = 0;
7740 /* Parse all the macro args that are supplied. I counts them.
7741 The first NARGS args are stored in ARGS.
7742 The rest are discarded.
7743 If rest_args is set then we assume macarg absorbed the rest of the args.
7748 /* Discard the open-parenthesis or comma before the next arg. */
7749 ++instack[indepth].bufp;
7752 if (i < nargs || (nargs == 0 && i == 0)) {
7753 /* if we are working on last arg which absorbs rest of args... */
7754 if (i == nargs - 1 && defn->rest_args)
7756 parse_error = macarg (&args[i], rest_args);
7759 parse_error = macarg (NULL_PTR, 0);
7761 error_with_line (line_for_error (start_line), parse_error);
7765 } while (*instack[indepth].bufp != ')');
7767 /* If we got one arg but it was just whitespace, call that 0 args. */
7769 register U_CHAR *bp = args[0].raw;
7770 register U_CHAR *lim = bp + args[0].raw_length;
7771 /* cpp.texi says for foo ( ) we provide one argument.
7772 However, if foo wants just 0 arguments, treat this as 0. */
7774 while (bp != lim && is_space[*bp]) bp++;
7779 /* Don't output an error message if we have already output one for
7780 a parse error above. */
7782 if (nargs == 0 && i > 0) {
7784 error ("arguments given to macro `%s'", hp->name);
7785 } else if (i < nargs) {
7786 /* traditional C allows foo() if foo wants one argument. */
7787 if (nargs == 1 && i == 0 && traditional)
7789 /* the rest args token is allowed to absorb 0 tokens */
7790 else if (i == nargs - 1 && defn->rest_args)
7792 else if (parse_error)
7795 error ("macro `%s' used without args", hp->name);
7797 error ("macro `%s' used with just one arg", hp->name);
7799 error ("macro `%s' used with only %d args", hp->name, i);
7800 } else if (i > nargs) {
7802 error ("macro `%s' used with too many (%d) args", hp->name, i);
7805 /* Swallow the closeparen. */
7806 ++instack[indepth].bufp;
7808 /* If macro wants zero args, we parsed the arglist for checking only.
7809 Read directly from the macro definition. */
7811 xbuf = defn->expansion;
7812 xbuf_len = defn->length;
7814 register U_CHAR *exp = defn->expansion;
7815 register int offset; /* offset in expansion,
7816 copied a piece at a time */
7817 register int totlen; /* total amount of exp buffer filled so far */
7819 register struct reflist *ap, *last_ap;
7821 /* Macro really takes args. Compute the expansion of this call. */
7823 /* Compute length in characters of the macro's expansion.
7824 Also count number of times each arg is used. */
7825 xbuf_len = defn->length;
7826 for (ap = defn->pattern; ap != NULL; ap = ap->next) {
7828 xbuf_len += args[ap->argno].stringified_length;
7829 else if (ap->raw_before || ap->raw_after || traditional)
7830 /* Add 4 for two newline-space markers to prevent
7831 token concatenation. */
7832 xbuf_len += args[ap->argno].raw_length + 4;
7834 /* We have an ordinary (expanded) occurrence of the arg.
7835 So compute its expansion, if we have not already. */
7836 if (args[ap->argno].expanded == 0) {
7838 obuf = expand_to_temp_buffer (args[ap->argno].raw,
7839 args[ap->argno].raw + args[ap->argno].raw_length,
7842 args[ap->argno].expanded = obuf.buf;
7843 args[ap->argno].expand_length = obuf.length;
7844 args[ap->argno].free2 = obuf.buf;
7847 /* Add 4 for two newline-space markers to prevent
7848 token concatenation. */
7849 xbuf_len += args[ap->argno].expand_length + 4;
7851 if (args[ap->argno].use_count < 10)
7852 args[ap->argno].use_count++;
7855 xbuf = (U_CHAR *) xmalloc (xbuf_len + 1);
7857 /* Generate in XBUF the complete expansion
7858 with arguments substituted in.
7859 TOTLEN is the total size generated so far.
7860 OFFSET is the index in the definition
7861 of where we are copying from. */
7862 offset = totlen = 0;
7863 for (last_ap = NULL, ap = defn->pattern; ap != NULL;
7864 last_ap = ap, ap = ap->next) {
7865 register struct argdata *arg = &args[ap->argno];
7866 int count_before = totlen;
7868 /* Add chars to XBUF. */
7869 for (i = 0; i < ap->nchars; i++, offset++)
7870 xbuf[totlen++] = exp[offset];
7872 /* If followed by an empty rest arg with concatenation,
7873 delete the last run of nonwhite chars. */
7874 if (rest_zero && totlen > count_before
7875 && ((ap->rest_args && ap->raw_before)
7876 || (last_ap != NULL && last_ap->rest_args
7877 && last_ap->raw_after))) {
7878 /* Delete final whitespace. */
7879 while (totlen > count_before && is_space[xbuf[totlen - 1]]) {
7883 /* Delete the nonwhites before them. */
7884 while (totlen > count_before && ! is_space[xbuf[totlen - 1]]) {
7889 if (ap->stringify != 0) {
7890 int arglen = arg->raw_length;
7896 && (c = arg->raw[i], is_space[c]))
7899 && (c = arg->raw[arglen - 1], is_space[c]))
7902 xbuf[totlen++] = '\"'; /* insert beginning quote */
7903 for (; i < arglen; i++) {
7906 /* Special markers Newline Space
7907 generate nothing for a stringified argument. */
7908 if (c == '\n' && arg->raw[i+1] != '\n') {
7913 /* Internal sequences of whitespace are replaced by one space
7914 except within an string or char token. */
7916 && (c == '\n' ? arg->raw[i+1] == '\n' : is_space[c])) {
7918 /* Note that Newline Space does occur within whitespace
7919 sequences; consider it part of the sequence. */
7920 if (c == '\n' && is_space[arg->raw[i+1]])
7922 else if (c != '\n' && is_space[c])
7939 } else if (c == '\"' || c == '\'')
7943 /* Escape these chars */
7944 if (c == '\"' || (in_string && c == '\\'))
7945 xbuf[totlen++] = '\\';
7949 sprintf ((char *) &xbuf[totlen], "\\%03o", (unsigned int) c);
7954 xbuf[totlen++] = '\"'; /* insert ending quote */
7955 } else if (ap->raw_before || ap->raw_after || traditional) {
7956 U_CHAR *p1 = arg->raw;
7957 U_CHAR *l1 = p1 + arg->raw_length;
7958 if (ap->raw_before) {
7959 while (p1 != l1 && is_space[*p1]) p1++;
7960 while (p1 != l1 && is_idchar[*p1])
7961 xbuf[totlen++] = *p1++;
7962 /* Delete any no-reexpansion marker that follows
7963 an identifier at the beginning of the argument
7964 if the argument is concatenated with what precedes it. */
7965 if (p1[0] == '\n' && p1[1] == '-')
7967 } else if (!traditional) {
7968 /* Ordinary expanded use of the argument.
7969 Put in newline-space markers to prevent token pasting. */
7970 xbuf[totlen++] = '\n';
7971 xbuf[totlen++] = ' ';
7973 if (ap->raw_after) {
7974 /* Arg is concatenated after: delete trailing whitespace,
7975 whitespace markers, and no-reexpansion markers. */
7977 if (is_space[l1[-1]]) l1--;
7978 else if (l1[-1] == '-') {
7979 U_CHAR *p2 = l1 - 1;
7980 /* If a `-' is preceded by an odd number of newlines then it
7981 and the last newline are a no-reexpansion marker. */
7982 while (p2 != p1 && p2[-1] == '\n') p2--;
7983 if ((l1 - 1 - p2) & 1) {
7992 bcopy ((char *) p1, (char *) (xbuf + totlen), l1 - p1);
7994 if (!traditional && !ap->raw_after) {
7995 /* Ordinary expanded use of the argument.
7996 Put in newline-space markers to prevent token pasting. */
7997 xbuf[totlen++] = '\n';
7998 xbuf[totlen++] = ' ';
8001 /* Ordinary expanded use of the argument.
8002 Put in newline-space markers to prevent token pasting. */
8004 xbuf[totlen++] = '\n';
8005 xbuf[totlen++] = ' ';
8007 bcopy ((char *) arg->expanded, (char *) (xbuf + totlen),
8008 arg->expand_length);
8009 totlen += arg->expand_length;
8011 xbuf[totlen++] = '\n';
8012 xbuf[totlen++] = ' ';
8014 /* If a macro argument with newlines is used multiple times,
8015 then only expand the newlines once. This avoids creating output
8016 lines which don't correspond to any input line, which confuses
8018 if (arg->use_count > 1 && arg->newlines > 0) {
8019 /* Don't bother doing change_newlines for subsequent
8023 = change_newlines (arg->expanded, arg->expand_length);
8027 if (totlen > xbuf_len)
8031 /* if there is anything left of the definition
8032 after handling the arg list, copy that in too. */
8034 for (i = offset; i < defn->length; i++) {
8035 /* if we've reached the end of the macro */
8038 if (! (rest_zero && last_ap != NULL && last_ap->rest_args
8039 && last_ap->raw_after))
8040 xbuf[totlen++] = exp[i];
8046 for (i = 0; i < nargs; i++) {
8047 if (args[i].free1 != 0)
8048 free (args[i].free1);
8049 if (args[i].free2 != 0)
8050 free (args[i].free2);
8054 xbuf = defn->expansion;
8055 xbuf_len = defn->length;
8058 /* Now put the expansion on the input stack
8059 so our caller will commence reading from it. */
8061 register FILE_BUF *ip2;
8063 ip2 = &instack[++indepth];
8066 ip2->nominal_fname = 0;
8067 /* This may not be exactly correct, but will give much better error
8068 messages for nested macro calls than using a line number of zero. */
8069 ip2->lineno = start_line;
8071 ip2->length = xbuf_len;
8073 ip2->free_ptr = (nargs > 0) ? xbuf : 0;
8075 ip2->if_stack = if_stack;
8076 ip2->system_header_p = 0;
8078 /* Recursive macro use sometimes works traditionally.
8079 #define foo(x,y) bar (x (y,0), y)
8083 hp->type = T_DISABLED;
8088 * Parse a macro argument and store the info on it into *ARGPTR.
8089 * REST_ARGS is passed to macarg1 to make it absorb the rest of the args.
8090 * Return nonzero to indicate a syntax error.
8094 macarg (argptr, rest_args)
8095 register struct argdata *argptr;
8098 FILE_BUF *ip = &instack[indepth];
8103 /* Try to parse as much of the argument as exists at this
8104 input stack level. */
8105 U_CHAR *bp = macarg1 (ip->bufp, ip->buf + ip->length,
8106 &paren, &newlines, &comments, rest_args);
8108 /* If we find the end of the argument at this level,
8109 set up *ARGPTR to point at it in the input stack. */
8110 if (!(ip->fname != 0 && (newlines != 0 || comments != 0))
8111 && bp != ip->buf + ip->length) {
8113 argptr->raw = ip->bufp;
8114 argptr->raw_length = bp - ip->bufp;
8115 argptr->newlines = newlines;
8119 /* This input stack level ends before the macro argument does.
8120 We must pop levels and keep parsing.
8121 Therefore, we must allocate a temporary buffer and copy
8122 the macro argument into it. */
8123 int bufsize = bp - ip->bufp;
8124 int extra = newlines;
8125 U_CHAR *buffer = (U_CHAR *) xmalloc (bufsize + extra + 1);
8126 int final_start = 0;
8128 bcopy ((char *) ip->bufp, (char *) buffer, bufsize);
8130 ip->lineno += newlines;
8132 while (bp == ip->buf + ip->length) {
8133 if (instack[indepth].macro == 0) {
8135 return "unterminated macro call";
8137 ip->macro->type = T_MACRO;
8139 free (ip->free_ptr);
8140 ip = &instack[--indepth];
8143 bp = macarg1 (ip->bufp, ip->buf + ip->length, &paren,
8144 &newlines, &comments, rest_args);
8145 final_start = bufsize;
8146 bufsize += bp - ip->bufp;
8148 buffer = (U_CHAR *) xrealloc (buffer, bufsize + extra + 1);
8149 bcopy ((char *) ip->bufp, (char *) (buffer + bufsize - (bp - ip->bufp)),
8152 ip->lineno += newlines;
8155 /* Now, if arg is actually wanted, record its raw form,
8156 discarding comments and duplicating newlines in whatever
8157 part of it did not come from a macro expansion.
8158 EXTRA space has been preallocated for duplicating the newlines.
8159 FINAL_START is the index of the start of that part. */
8161 argptr->raw = buffer;
8162 argptr->raw_length = bufsize;
8163 argptr->free1 = buffer;
8164 argptr->newlines = newlines;
8165 argptr->comments = comments;
8166 if ((newlines || comments) && ip->fname != 0)
8169 discard_comments (argptr->raw + final_start,
8170 argptr->raw_length - final_start,
8172 argptr->raw[argptr->raw_length] = 0;
8173 if (argptr->raw_length > bufsize + extra)
8178 /* If we are not discarding this argument,
8179 macroexpand it and compute its length as stringified.
8180 All this info goes into *ARGPTR. */
8183 register U_CHAR *buf, *lim;
8184 register int totlen;
8187 lim = buf + argptr->raw_length;
8189 while (buf != lim && is_space[*buf])
8191 while (buf != lim && is_space[lim[-1]])
8193 totlen = traditional ? 0 : 2; /* Count opening and closing quote. */
8194 while (buf != lim) {
8195 register U_CHAR c = *buf++;
8197 /* Internal sequences of whitespace are replaced by one space
8198 in most cases, but not always. So count all the whitespace
8199 in case we need to keep it all. */
8202 SKIP_ALL_WHITE_SPACE (buf);
8205 if (c == '\"' || c == '\\') /* escape these chars */
8207 else if (!isprint (c))
8210 argptr->stringified_length = totlen;
8215 /* Scan text from START (inclusive) up to LIMIT (exclusive),
8216 counting parens in *DEPTHPTR,
8217 and return if reach LIMIT
8218 or before a `)' that would make *DEPTHPTR negative
8219 or before a comma when *DEPTHPTR is zero.
8220 Single and double quotes are matched and termination
8221 is inhibited within them. Comments also inhibit it.
8222 Value returned is pointer to stopping place.
8224 Increment *NEWLINES each time a newline is passed.
8225 REST_ARGS notifies macarg1 that it should absorb the rest of the args.
8226 Set *COMMENTS to 1 if a comment is seen. */
8229 macarg1 (start, limit, depthptr, newlines, comments, rest_args)
8231 register U_CHAR *limit;
8232 int *depthptr, *newlines, *comments;
8235 register U_CHAR *bp = start;
8237 while (bp < limit) {
8243 if (--(*depthptr) < 0)
8247 /* Traditionally, backslash makes following char not special. */
8248 if (bp + 1 < limit && traditional)
8251 /* But count source lines anyway. */
8260 if (bp[1] == '\\' && bp[2] == '\n')
8261 newline_fix (bp + 1);
8262 if (cplusplus_comments && bp[1] == '/') {
8265 while (bp < limit && (*bp != '\n' || bp[-1] == '\\')) {
8266 if (*bp == '\n') ++*newlines;
8271 if (bp[1] != '*' || bp + 1 >= limit)
8275 while (bp + 1 < limit) {
8277 && bp[1] == '\\' && bp[2] == '\n')
8278 newline_fix (bp + 1);
8279 if (bp[0] == '*' && bp[1] == '/')
8281 if (*bp == '\n') ++*newlines;
8289 for (quotec = *bp++; bp + 1 < limit && *bp != quotec; bp++) {
8294 while (*bp == '\\' && bp[1] == '\n') {
8297 } else if (*bp == '\n') {
8306 /* if we've returned to lowest level and we aren't absorbing all args */
8307 if ((*depthptr) == 0 && rest_args == 0)
8317 /* Discard comments and duplicate newlines
8318 in the string of length LENGTH at START,
8319 except inside of string constants.
8320 The string is copied into itself with its beginning staying fixed.
8322 NEWLINES is the number of newlines that must be duplicated.
8323 We assume that that much extra space is available past the end
8327 discard_comments (start, length, newlines)
8332 register U_CHAR *ibp;
8333 register U_CHAR *obp;
8334 register U_CHAR *limit;
8337 /* If we have newlines to duplicate, copy everything
8338 that many characters up. Then, in the second part,
8339 we will have room to insert the newlines
8341 NEWLINES may actually be too large, because it counts
8342 newlines in string constants, and we don't duplicate those.
8343 But that does no harm. */
8345 ibp = start + length;
8346 obp = ibp + newlines;
8348 while (limit != ibp)
8352 ibp = start + newlines;
8353 limit = start + length + newlines;
8356 while (ibp < limit) {
8357 *obp++ = c = *ibp++;
8360 /* Duplicate the newline. */
8372 if (*ibp == '\\' && ibp[1] == '\n')
8374 /* Delete any comment. */
8375 if (cplusplus_comments && ibp[0] == '/') {
8376 /* Comments are equivalent to spaces. */
8379 while (ibp < limit && (*ibp != '\n' || ibp[-1] == '\\'))
8383 if (ibp[0] != '*' || ibp + 1 >= limit)
8385 /* Comments are equivalent to spaces. */
8388 while (ibp + 1 < limit) {
8390 && ibp[1] == '\\' && ibp[2] == '\n')
8391 newline_fix (ibp + 1);
8392 if (ibp[0] == '*' && ibp[1] == '/')
8401 /* Notice and skip strings, so that we don't
8402 think that comments start inside them,
8403 and so we don't duplicate newlines in them. */
8406 while (ibp < limit) {
8407 *obp++ = c = *ibp++;
8410 if (c == '\n' && quotec == '\'')
8412 if (c == '\\' && ibp < limit) {
8413 while (*ibp == '\\' && ibp[1] == '\n')
8426 /* Turn newlines to spaces in the string of length LENGTH at START,
8427 except inside of string constants.
8428 The string is copied into itself with its beginning staying fixed. */
8431 change_newlines (start, length)
8435 register U_CHAR *ibp;
8436 register U_CHAR *obp;
8437 register U_CHAR *limit;
8441 limit = start + length;
8444 while (ibp < limit) {
8445 *obp++ = c = *ibp++;
8448 /* If this is a NEWLINE NEWLINE, then this is a real newline in the
8449 string. Skip past the newline and its duplicate.
8450 Put a space in the output. */
8461 /* Notice and skip strings, so that we don't delete newlines in them. */
8464 while (ibp < limit) {
8465 *obp++ = c = *ibp++;
8468 if (c == '\n' && quotec == '\'')
8480 * my_strerror - return the descriptive text associated with an `errno' code.
8484 my_strerror (errnum)
8490 #ifndef HAVE_STRERROR
8491 result = (char *) ((errnum < sys_nerr) ? sys_errlist[errnum] : 0);
8493 result = strerror (errnum);
8496 /* VAXCRTL's strerror() takes an optional second argument, which only
8497 matters when the first argument is EVMSERR. However, it's simplest
8498 just to pass it unconditionally. `vaxc$errno' is declared in
8499 <errno.h>, and maintained by the library in parallel with `errno'.
8500 We assume that caller's `errnum' either matches the last setting of
8501 `errno' by the library or else does not have the value `EVMSERR'. */
8503 result = strerror (errnum, vaxc$errno);
8507 result = "undocumented I/O error";
8513 * error - print error message and increment count of errors.
8517 error (msg, arg1, arg2, arg3)
8519 char *arg1, *arg2, *arg3;
8522 FILE_BUF *ip = NULL;
8524 print_containing_files ();
8526 for (i = indepth; i >= 0; i--)
8527 if (instack[i].fname != NULL) {
8533 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8534 fprintf (stderr, msg, arg1, arg2, arg3);
8535 fprintf (stderr, "\n");
8539 /* Error including a message from `errno'. */
8542 error_from_errno (name)
8546 FILE_BUF *ip = NULL;
8548 print_containing_files ();
8550 for (i = indepth; i >= 0; i--)
8551 if (instack[i].fname != NULL) {
8557 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8559 fprintf (stderr, "%s: %s\n", name, my_strerror (errno));
8564 /* Print error message but don't count it. */
8567 warning (msg, arg1, arg2, arg3)
8569 char *arg1, *arg2, *arg3;
8572 FILE_BUF *ip = NULL;
8574 if (inhibit_warnings)
8577 if (warnings_are_errors)
8580 print_containing_files ();
8582 for (i = indepth; i >= 0; i--)
8583 if (instack[i].fname != NULL) {
8589 fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno);
8590 fprintf (stderr, "warning: ");
8591 fprintf (stderr, msg, arg1, arg2, arg3);
8592 fprintf (stderr, "\n");
8596 error_with_line (line, msg, arg1, arg2, arg3)
8599 char *arg1, *arg2, *arg3;
8602 FILE_BUF *ip = NULL;
8604 print_containing_files ();
8606 for (i = indepth; i >= 0; i--)
8607 if (instack[i].fname != NULL) {
8613 fprintf (stderr, "%s:%d: ", ip->nominal_fname, line);
8614 fprintf (stderr, msg, arg1, arg2, arg3);
8615 fprintf (stderr, "\n");
8620 warning_with_line (line, msg, arg1, arg2, arg3)
8623 char *arg1, *arg2, *arg3;
8626 FILE_BUF *ip = NULL;
8628 if (inhibit_warnings)
8631 if (warnings_are_errors)
8634 print_containing_files ();
8636 for (i = indepth; i >= 0; i--)
8637 if (instack[i].fname != NULL) {
8643 fprintf (stderr, "%s:%d: ", ip->nominal_fname, line);
8644 fprintf (stderr, "warning: ");
8645 fprintf (stderr, msg, arg1, arg2, arg3);
8646 fprintf (stderr, "\n");
8649 /* print an error message and maybe count it. */
8652 pedwarn (msg, arg1, arg2, arg3)
8654 char *arg1, *arg2, *arg3;
8656 if (pedantic_errors)
8657 error (msg, arg1, arg2, arg3);
8659 warning (msg, arg1, arg2, arg3);
8663 pedwarn_with_line (line, msg, arg1, arg2, arg3)
8666 char *arg1, *arg2, *arg3;
8668 if (pedantic_errors)
8669 error_with_line (line, msg, arg1, arg2, arg3);
8671 warning_with_line (line, msg, arg1, arg2, arg3);
8674 /* Report a warning (or an error if pedantic_errors)
8675 giving specified file name and line number, not current. */
8678 pedwarn_with_file_and_line (file, line, msg, arg1, arg2, arg3)
8682 char *arg1, *arg2, *arg3;
8684 if (!pedantic_errors && inhibit_warnings)
8687 fprintf (stderr, "%s:%d: ", file, line);
8688 if (pedantic_errors)
8690 if (!pedantic_errors)
8691 fprintf (stderr, "warning: ");
8692 fprintf (stderr, msg, arg1, arg2, arg3);
8693 fprintf (stderr, "\n");
8696 /* Print the file names and line numbers of the #include
8697 commands which led to the current file. */
8700 print_containing_files ()
8702 FILE_BUF *ip = NULL;
8706 /* If stack of files hasn't changed since we last printed
8707 this info, don't repeat it. */
8708 if (last_error_tick == input_file_stack_tick)
8711 for (i = indepth; i >= 0; i--)
8712 if (instack[i].fname != NULL) {
8717 /* Give up if we don't find a source file. */
8721 /* Find the other, outer source files. */
8722 for (i--; i >= 0; i--)
8723 if (instack[i].fname != NULL) {
8727 fprintf (stderr, "In file included");
8729 fprintf (stderr, ",\n ");
8732 fprintf (stderr, " from %s:%d", ip->nominal_fname, ip->lineno);
8735 fprintf (stderr, ":\n");
8737 /* Record we have printed the status as of this time. */
8738 last_error_tick = input_file_stack_tick;
8741 /* Return the line at which an error occurred.
8742 The error is not necessarily associated with the current spot
8743 in the input stack, so LINE says where. LINE will have been
8744 copied from ip->lineno for the current input level.
8745 If the current level is for a file, we return LINE.
8746 But if the current level is not for a file, LINE is meaningless.
8747 In that case, we return the lineno of the innermost file. */
8750 line_for_error (line)
8756 for (i = indepth; i >= 0; ) {
8757 if (instack[i].fname != 0)
8762 line1 = instack[i].lineno;
8770 * If OBUF doesn't have NEEDED bytes after OPTR, make it bigger.
8772 * As things stand, nothing is ever placed in the output buffer to be
8773 * removed again except when it's KNOWN to be part of an identifier,
8774 * so flushing and moving down everything left, instead of expanding,
8778 /* You might think void was cleaner for the return type,
8779 but that would get type mismatch in check_expand in strict ANSI. */
8781 grow_outbuf (obuf, needed)
8782 register FILE_BUF *obuf;
8783 register int needed;
8788 if (obuf->length - (obuf->bufp - obuf->buf) > needed)
8791 /* Make it at least twice as big as it is now. */
8793 /* Make it have at least 150% of the free space we will need. */
8794 minsize = (3 * needed) / 2 + (obuf->bufp - obuf->buf);
8795 if (minsize > obuf->length)
8796 obuf->length = minsize;
8798 if ((p = (U_CHAR *) xrealloc (obuf->buf, obuf->length)) == NULL)
8801 obuf->bufp = p + (obuf->bufp - obuf->buf);
8807 /* Symbol table for macro names and special symbols */
8810 * install a name in the main hash table, even if it is already there.
8811 * name stops with first non alphanumeric, except leading '#'.
8812 * caller must check against redefinition if that is desired.
8813 * delete_macro () removes things installed by install () in fifo order.
8814 * this is important because of the `defined' special symbol used
8815 * in #if, and also if pushdef/popdef directives are ever implemented.
8817 * If LEN is >= 0, it is the length of the name.
8818 * Otherwise, compute the length by scanning the entire name.
8820 * If HASH is >= 0, it is the precomputed hash code.
8821 * Otherwise, compute the hash code.
8824 install (name, len, type, ivalue, value, hash)
8827 enum node_type type;
8832 register HASHNODE *hp;
8833 register int i, bucket;
8834 register U_CHAR *p, *q;
8838 while (is_idchar[*p])
8844 hash = hashf (name, len, HASHSIZE);
8846 i = sizeof (HASHNODE) + len + 1;
8847 hp = (HASHNODE *) xmalloc (i);
8849 hp->bucket_hdr = &hashtab[bucket];
8850 hp->next = hashtab[bucket];
8851 hashtab[bucket] = hp;
8853 if (hp->next != NULL)
8854 hp->next->prev = hp;
8857 if (hp->type == T_CONST)
8858 hp->value.ival = ivalue;
8860 hp->value.cpval = value;
8861 hp->name = ((U_CHAR *) hp) + sizeof (HASHNODE);
8864 for (i = 0; i < len; i++)
8871 * find the most recent hash node for name name (ending with first
8872 * non-identifier char) installed by install
8874 * If LEN is >= 0, it is the length of the name.
8875 * Otherwise, compute the length by scanning the entire name.
8877 * If HASH is >= 0, it is the precomputed hash code.
8878 * Otherwise, compute the hash code.
8881 lookup (name, len, hash)
8886 register U_CHAR *bp;
8887 register HASHNODE *bucket;
8890 for (bp = name; is_idchar[*bp]; bp++) ;
8895 hash = hashf (name, len, HASHSIZE);
8897 bucket = hashtab[hash];
8899 if (bucket->length == len && strncmp (bucket->name, name, len) == 0)
8901 bucket = bucket->next;
8907 * Delete a hash node. Some weirdness to free junk from macros.
8908 * More such weirdness will have to be added if you define more hash
8909 * types that need it.
8912 /* Note that the DEFINITION of a macro is removed from the hash table
8913 but its storage is not freed. This would be a storage leak
8914 except that it is not reasonable to keep undefining and redefining
8915 large numbers of macros many times.
8916 In any case, this is necessary, because a macro can be #undef'd
8917 in the middle of reading the arguments to a call to it.
8918 If #undef freed the DEFINITION, that would crash. */
8925 if (hp->prev != NULL)
8926 hp->prev->next = hp->next;
8927 if (hp->next != NULL)
8928 hp->next->prev = hp->prev;
8930 /* make sure that the bucket chain header that
8931 the deleted guy was on points to the right thing afterwards. */
8932 if (hp == *hp->bucket_hdr)
8933 *hp->bucket_hdr = hp->next;
8936 if (hp->type == T_MACRO) {
8937 DEFINITION *d = hp->value.defn;
8938 struct reflist *ap, *nextap;
8940 for (ap = d->pattern; ap != NULL; ap = nextap) {
8951 * return hash function on name. must be compatible with the one
8952 * computed a step at a time, elsewhere
8955 hashf (name, len, hashsize)
8956 register U_CHAR *name;
8963 r = HASHSTEP (r, *name++);
8965 return MAKE_POS (r) % hashsize;
8969 /* Dump the definition of a single macro HP to OF. */
8971 dump_single_macro (hp, of)
8972 register HASHNODE *hp;
8975 register DEFINITION *defn = hp->value.defn;
8981 /* Print the definition of the macro HP. */
8983 fprintf (of, "#define %s", hp->name);
8985 if (defn->nargs >= 0) {
8989 for (i = 0; i < defn->nargs; i++) {
8990 dump_arg_n (defn, i, of);
8991 if (i + 1 < defn->nargs)
9001 for (ap = defn->pattern; ap != NULL; ap = ap->next) {
9002 dump_defn_1 (defn->expansion, offset, ap->nchars, of);
9003 if (ap->nchars != 0)
9005 offset += ap->nchars;
9008 if (ap->raw_before && !concat)
9009 fprintf (of, " ## ");
9011 dump_arg_n (defn, ap->argno, of);
9012 if (ap->raw_after) {
9013 fprintf (of, " ## ");
9017 dump_defn_1 (defn->expansion, offset, defn->length - offset, of);
9021 /* Dump all macro definitions as #defines to stdout. */
9028 for (bucket = 0; bucket < HASHSIZE; bucket++) {
9029 register HASHNODE *hp;
9031 for (hp = hashtab[bucket]; hp; hp= hp->next) {
9032 if (hp->type == T_MACRO)
9033 dump_single_macro (hp, stdout);
9038 /* Output to OF a substring of a macro definition.
9039 BASE is the beginning of the definition.
9040 Output characters START thru LENGTH.
9041 Discard newlines outside of strings, thus
9042 converting funny-space markers to ordinary spaces. */
9045 dump_defn_1 (base, start, length, of)
9051 U_CHAR *p = base + start;
9052 U_CHAR *limit = base + start + length;
9055 if (*p == '\"' || *p =='\'') {
9056 U_CHAR *p1 = skip_quoted_string (p, limit, 0, NULL_PTR,
9057 NULL_PTR, NULL_PTR);
9058 fwrite (p, p1 - p, 1, of);
9068 /* Print the name of argument number ARGNUM of macro definition DEFN
9070 Recall that DEFN->args.argnames contains all the arg names
9071 concatenated in reverse order with comma-space in between. */
9074 dump_arg_n (defn, argnum, of)
9079 register U_CHAR *p = defn->args.argnames;
9080 while (argnum + 1 < defn->nargs) {
9081 p = (U_CHAR *) index (p, ' ') + 1;
9085 while (*p && *p != ',') {
9091 /* Initialize syntactic classifications of characters. */
9094 initialize_char_syntax ()
9099 * Set up is_idchar and is_idstart tables. These should be
9100 * faster than saying (is_alpha (c) || c == '_'), etc.
9101 * Set up these things before calling any routines tthat
9104 for (i = 'a'; i <= 'z'; i++) {
9105 is_idchar[i - 'a' + 'A'] = 1;
9107 is_idstart[i - 'a' + 'A'] = 1;
9110 for (i = '0'; i <= '9'; i++)
9113 is_idstart['_'] = 1;
9114 is_idchar['$'] = dollars_in_ident;
9115 is_idstart['$'] = dollars_in_ident;
9117 /* horizontal space table */
9118 is_hor_space[' '] = 1;
9119 is_hor_space['\t'] = 1;
9120 is_hor_space['\v'] = 1;
9121 is_hor_space['\f'] = 1;
9122 is_hor_space['\r'] = 1;
9132 /* Initialize the built-in macros. */
9135 initialize_builtins (inp, outp)
9139 install ("__LINE__", -1, T_SPECLINE, 0, 0, -1);
9140 install ("__DATE__", -1, T_DATE, 0, 0, -1);
9141 install ("__FILE__", -1, T_FILE, 0, 0, -1);
9142 install ("__BASE_FILE__", -1, T_BASE_FILE, 0, 0, -1);
9143 install ("__INCLUDE_LEVEL__", -1, T_INCLUDE_LEVEL, 0, 0, -1);
9144 install ("__VERSION__", -1, T_VERSION, 0, 0, -1);
9145 #ifndef NO_BUILTIN_SIZE_TYPE
9146 install ("__SIZE_TYPE__", -1, T_SIZE_TYPE, 0, 0, -1);
9148 #ifndef NO_BUILTIN_PTRDIFF_TYPE
9149 install ("__PTRDIFF_TYPE__ ", -1, T_PTRDIFF_TYPE, 0, 0, -1);
9151 install ("__WCHAR_TYPE__", -1, T_WCHAR_TYPE, 0, 0, -1);
9152 install ("__USER_LABEL_PREFIX__", -1, T_USER_LABEL_PREFIX_TYPE, 0, 0, -1);
9153 install ("__REGISTER_PREFIX__", -1, T_REGISTER_PREFIX_TYPE, 0, 0, -1);
9154 install ("__TIME__", -1, T_TIME, 0, 0, -1);
9156 install ("__STDC__", -1, T_CONST, STDC_VALUE, 0, -1);
9158 install ("__OBJC__", -1, T_CONST, 1, 0, -1);
9159 /* This is supplied using a -D by the compiler driver
9160 so that it is present only when truly compiling with GNU C. */
9161 /* install ("__GNUC__", -1, T_CONST, 2, 0, -1); */
9165 char directive[2048];
9166 register struct directive *dp = &directive_table[0];
9167 struct tm *timebuf = timestamp ();
9169 sprintf (directive, " __BASE_FILE__ \"%s\"\n",
9170 instack[0].nominal_fname);
9171 output_line_command (inp, outp, 0, same_file);
9172 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9174 sprintf (directive, " __VERSION__ \"%s\"\n", version_string);
9175 output_line_command (inp, outp, 0, same_file);
9176 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9178 #ifndef NO_BUILTIN_SIZE_TYPE
9179 sprintf (directive, " __SIZE_TYPE__ %s\n", SIZE_TYPE);
9180 output_line_command (inp, outp, 0, same_file);
9181 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9184 #ifndef NO_BUILTIN_PTRDIFF_TYPE
9185 sprintf (directive, " __PTRDIFF_TYPE__ %s\n", PTRDIFF_TYPE);
9186 output_line_command (inp, outp, 0, same_file);
9187 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9190 sprintf (directive, " __WCHAR_TYPE__ %s\n", wchar_type);
9191 output_line_command (inp, outp, 0, same_file);
9192 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9194 sprintf (directive, " __DATE__ \"%s %2d %4d\"\n",
9195 monthnames[timebuf->tm_mon],
9196 timebuf->tm_mday, timebuf->tm_year + 1900);
9197 output_line_command (inp, outp, 0, same_file);
9198 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9200 sprintf (directive, " __TIME__ \"%02d:%02d:%02d\"\n",
9201 timebuf->tm_hour, timebuf->tm_min, timebuf->tm_sec);
9202 output_line_command (inp, outp, 0, same_file);
9203 pass_thru_directive (directive, &directive[strlen (directive)], outp, dp);
9207 sprintf (directive, " __STDC__ 1");
9208 output_line_command (inp, outp, 0, same_file);
9209 pass_thru_directive (directive, &directive[strlen (directive)],
9214 sprintf (directive, " __OBJC__ 1");
9215 output_line_command (inp, outp, 0, same_file);
9216 pass_thru_directive (directive, &directive[strlen (directive)],
9223 * process a given definition string, for initialization
9224 * If STR is just an identifier, define it with value 1.
9225 * If STR has anything after the identifier, then it should
9226 * be identifier=definition.
9230 make_definition (str, op)
9235 struct directive *kt;
9240 if (!is_idstart[*p]) {
9241 error ("malformed option `-D %s'", str);
9244 while (is_idchar[*++p])
9247 buf = (U_CHAR *) alloca (p - buf + 4);
9248 strcpy ((char *)buf, str);
9249 strcat ((char *)buf, " 1");
9250 } else if (*p != '=') {
9251 error ("malformed option `-D %s'", str);
9255 /* Copy the entire option so we can modify it. */
9256 buf = (U_CHAR *) alloca (2 * strlen (str) + 1);
9257 strncpy (buf, str, p - str);
9258 /* Change the = to a space. */
9260 /* Scan for any backslash-newline and remove it. */
9264 if (*p == '\\' && p[1] == '\n')
9266 /* Change newline chars into newline-markers. */
9267 else if (*p == '\n')
9279 ip = &instack[++indepth];
9280 ip->nominal_fname = ip->fname = "*Initialization*";
9282 ip->buf = ip->bufp = buf;
9283 ip->length = strlen (buf);
9287 ip->if_stack = if_stack;
9288 ip->system_header_p = 0;
9290 for (kt = directive_table; kt->type != T_DEFINE; kt++)
9293 /* Pass NULL instead of OP, since this is a "predefined" macro. */
9294 do_define (buf, buf + strlen (buf), NULL, kt);
9298 /* JF, this does the work for the -U option */
9301 make_undef (str, op)
9306 struct directive *kt;
9308 ip = &instack[++indepth];
9309 ip->nominal_fname = ip->fname = "*undef*";
9311 ip->buf = ip->bufp = str;
9312 ip->length = strlen (str);
9316 ip->if_stack = if_stack;
9317 ip->system_header_p = 0;
9319 for (kt = directive_table; kt->type != T_UNDEF; kt++)
9322 do_undef (str, str + strlen (str), op, kt);
9326 /* Process the string STR as if it appeared as the body of a #assert.
9327 OPTION is the option name for which STR was the argument. */
9330 make_assertion (option, str)
9335 struct directive *kt;
9336 U_CHAR *buf, *p, *q;
9338 /* Copy the entire option so we can modify it. */
9339 buf = (U_CHAR *) alloca (strlen (str) + 1);
9340 strcpy ((char *) buf, str);
9341 /* Scan for any backslash-newline and remove it. */
9344 if (*p == '\\' && p[1] == '\n')
9352 if (!is_idstart[*p]) {
9353 error ("malformed option `%s %s'", option, str);
9356 while (is_idchar[*++p])
9358 while (*p == ' ' || *p == '\t') p++;
9359 if (! (*p == 0 || *p == '(')) {
9360 error ("malformed option `%s %s'", option, str);
9364 ip = &instack[++indepth];
9365 ip->nominal_fname = ip->fname = "*Initialization*";
9367 ip->buf = ip->bufp = buf;
9368 ip->length = strlen (buf);
9372 ip->if_stack = if_stack;
9373 ip->system_header_p = 0;
9375 for (kt = directive_table; kt->type != T_ASSERT; kt++)
9378 /* pass NULL as output ptr to do_define since we KNOW it never
9379 does any output.... */
9380 do_assert (buf, buf + strlen (buf) , NULL_PTR, kt);
9384 /* Append a chain of `struct file_name_list's
9385 to the end of the main include chain.
9386 FIRST is the beginning of the chain to append, and LAST is the end. */
9389 append_include_chain (first, last)
9390 struct file_name_list *first, *last;
9392 struct file_name_list *dir;
9394 if (!first || !last)
9400 last_include->next = first;
9402 if (first_bracket_include == 0)
9403 first_bracket_include = first;
9405 for (dir = first; ; dir = dir->next) {
9406 int len = strlen (dir->fname) + INCLUDE_LEN_FUDGE;
9407 if (len > max_include_len)
9408 max_include_len = len;
9414 last_include = last;
9417 /* Add output to `deps_buffer' for the -M switch.
9418 STRING points to the text to be output.
9419 SPACER is ':' for targets, ' ' for dependencies, zero for text
9420 to be inserted literally. */
9423 deps_output (string, spacer)
9427 int size = strlen (string);
9432 #ifndef MAX_OUTPUT_COLUMNS
9433 #define MAX_OUTPUT_COLUMNS 72
9437 && (deps_column + size) > MAX_OUTPUT_COLUMNS)
9439 deps_output (" \\\n ", 0);
9443 if (deps_size + size + 8 > deps_allocated_size) {
9444 deps_allocated_size = (deps_size + size + 50) * 2;
9445 deps_buffer = (char *) xrealloc (deps_buffer, deps_allocated_size);
9447 if (spacer == ' ' && deps_column > 0)
9448 deps_buffer[deps_size++] = ' ';
9449 bcopy (string, &deps_buffer[deps_size], size);
9451 deps_column += size;
9453 deps_buffer[deps_size++] = ':';
9454 deps_buffer[deps_size] = 0;
9457 #if defined(USG) || defined(VMS)
9463 register unsigned length;
9465 while (length-- > 0)
9470 bcopy (b1, b2, length)
9473 register unsigned length;
9475 while (length-- > 0)
9480 bcmp (b1, b2, length) /* This could be a macro! */
9483 register unsigned length;
9485 while (length-- > 0)
9491 #endif /* not BSTRING */
9492 #endif /* USG or VMS */
9499 fprintf (stderr, "%s: ", progname);
9500 fprintf (stderr, str, arg);
9501 fprintf (stderr, "\n");
9502 exit (FAILURE_EXIT_CODE);
9505 /* More 'friendly' abort that prints the line and file.
9506 config.h can #define abort fancy_abort if you like that sort of thing. */
9511 fatal ("Internal gcc abort.");
9515 perror_with_name (name)
9518 fprintf (stderr, "%s: ", progname);
9519 fprintf (stderr, "%s: %s\n", name, my_strerror (errno));
9524 pfatal_with_name (name)
9527 perror_with_name (name);
9531 exit (FAILURE_EXIT_CODE);
9535 /* Handler for SIGPIPE. */
9539 /* If this is missing, some compilers complain. */
9542 fatal ("output pipe has been closed");
9548 fatal ("Memory exhausted.");
9556 register char *ptr = (char *) malloc (size);
9557 if (ptr != 0) return (ptr);
9564 xrealloc (old, size)
9568 register char *ptr = (char *) realloc (old, size);
9569 if (ptr != 0) return (ptr);
9576 xcalloc (number, size)
9577 unsigned number, size;
9579 register unsigned total = number * size;
9580 register char *ptr = (char *) malloc (total);
9585 /* It's not too long, so loop, zeroing by longs.
9586 It must be safe because malloc values are always well aligned. */
9587 register long *zp = (long *) ptr;
9588 register long *zl = (long *) (ptr + total - 4);
9589 register int i = total - 4;
9608 unsigned size = strlen (input);
9609 char *output = xmalloc (size + 1);
9610 strcpy (output, input);
9614 /* Get the file-mode and data size of the file open on FD
9615 and store them in *MODE_POINTER and *SIZE_POINTER. */
9618 file_size_and_mode (fd, mode_pointer, size_pointer)
9621 long int *size_pointer;
9625 if (fstat (fd, &sbuf) < 0) return (-1);
9626 if (mode_pointer) *mode_pointer = sbuf.st_mode;
9627 if (size_pointer) *size_pointer = sbuf.st_size;
9632 output_dots (fd, depth)
9645 /* Under VMS we need to fix up the "include" specification
9646 filename so that everything following the 1st slash is
9647 changed into its correct VMS file specification. */
9650 hack_vms_include_specification (fname)
9653 register char *cp, *cp1, *cp2;
9654 int f, check_filename_before_returning, no_prefix_seen;
9657 check_filename_before_returning = 0;
9660 /* Ignore leading "./"s */
9661 while (fname[0] == '.' && fname[1] == '/') {
9662 strcpy (fname, fname+2);
9663 no_prefix_seen = 1; /* mark this for later */
9665 /* Look for the boundary between the VMS and UNIX filespecs */
9666 cp = rindex (fname, ']'); /* Look for end of dirspec. */
9667 if (cp == 0) cp = rindex (fname, '>'); /* ... Ditto */
9668 if (cp == 0) cp = rindex (fname, ':'); /* Look for end of devspec. */
9672 cp = index (fname, '/'); /* Look for the "/" */
9676 * Check if we have a vax-c style '#include filename'
9677 * and add the missing .h
9680 if (index(fname,'.') == 0)
9681 strcat(fname, ".h");
9683 if (index(cp,'.') == 0)
9687 cp2 = Local; /* initialize */
9689 /* We are trying to do a number of things here. First of all, we are
9690 trying to hammer the filenames into a standard format, such that later
9691 processing can handle them.
9693 If the file name contains something like [dir.], then it recognizes this
9694 as a root, and strips the ".]". Later processing will add whatever is
9695 needed to get things working properly.
9697 If no device is specified, then the first directory name is taken to be
9698 a device name (or a rooted logical). */
9700 /* See if we found that 1st slash */
9701 if (cp == 0) return; /* Nothing to do!!! */
9702 if (*cp != '/') return; /* Nothing to do!!! */
9703 /* Point to the UNIX filename part (which needs to be fixed!) */
9705 /* If the directory spec is not rooted, we can just copy
9706 the UNIX filename part and we are done */
9707 if (((cp - fname) > 1) && ((cp[-1] == ']') || (cp[-1] == '>'))) {
9708 if (cp[-2] != '.') {
9710 * The VMS part ends in a `]', and the preceding character is not a `.'.
9711 * We strip the `]', and then splice the two parts of the name in the
9712 * usual way. Given the default locations for include files in cccp.c,
9713 * we will only use this code if the user specifies alternate locations
9714 * with the /include (-I) switch on the command line. */
9715 cp -= 1; /* Strip "]" */
9716 cp1--; /* backspace */
9719 * The VMS part has a ".]" at the end, and this will not do. Later
9720 * processing will add a second directory spec, and this would be a syntax
9721 * error. Thus we strip the ".]", and thus merge the directory specs.
9722 * We also backspace cp1, so that it points to a '/'. This inhibits the
9723 * generation of the 000000 root directory spec (which does not belong here
9726 cp -= 2; /* Strip ".]" */
9727 cp1--; }; /* backspace */
9730 /* We drop in here if there is no VMS style directory specification yet.
9731 * If there is no device specification either, we make the first dir a
9732 * device and try that. If we do not do this, then we will be essentially
9733 * searching the users default directory (as if they did a #include "asdf.h").
9735 * Then all we need to do is to push a '[' into the output string. Later
9736 * processing will fill this in, and close the bracket.
9738 if (cp[-1] != ':') *cp2++ = ':'; /* dev not in spec. take first dir */
9739 *cp2++ = '['; /* Open the directory specification */
9742 /* at this point we assume that we have the device spec, and (at least
9743 the opening "[" for a directory specification. We may have directories
9744 specified already */
9746 /* If there are no other slashes then the filename will be
9747 in the "root" directory. Otherwise, we need to add
9748 directory specifications. */
9749 if (index (cp1, '/') == 0) {
9750 /* Just add "000000]" as the directory string */
9751 strcpy (cp2, "000000]");
9752 cp2 += strlen (cp2);
9753 check_filename_before_returning = 1; /* we might need to fool with this later */
9755 /* As long as there are still subdirectories to add, do them. */
9756 while (index (cp1, '/') != 0) {
9757 /* If this token is "." we can ignore it */
9758 if ((cp1[0] == '.') && (cp1[1] == '/')) {
9762 /* Add a subdirectory spec. Do not duplicate "." */
9763 if (cp2[-1] != '.' && cp2[-1] != '[' && cp2[-1] != '<')
9765 /* If this is ".." then the spec becomes "-" */
9766 if ((cp1[0] == '.') && (cp1[1] == '.') && (cp[2] == '/')) {
9767 /* Add "-" and skip the ".." */
9772 /* Copy the subdirectory */
9773 while (*cp1 != '/') *cp2++= *cp1++;
9774 cp1++; /* Skip the "/" */
9776 /* Close the directory specification */
9777 if (cp2[-1] == '.') /* no trailing periods */
9781 /* Now add the filename */
9782 while (*cp1) *cp2++ = *cp1++;
9784 /* Now append it to the original VMS spec. */
9787 /* If we put a [000000] in the filename, try to open it first. If this fails,
9788 remove the [000000], and return that name. This provides flexibility
9789 to the user in that they can use both rooted and non-rooted logical names
9790 to point to the location of the file. */
9792 if (check_filename_before_returning && no_prefix_seen) {
9793 f = open (fname, O_RDONLY, 0666);
9795 /* The file name is OK as it is, so return it as is. */
9799 /* The filename did not work. Try to remove the [000000] from the name,
9801 cp = index (fname, '[');
9802 cp2 = index (fname, ']') + 1;
9803 strcpy (cp, cp2); /* this gets rid of it */
9811 /* These are the read/write replacement routines for
9812 VAX-11 "C". They make read/write behave enough
9813 like their UNIX counterparts that CCCP will work */
9816 read (fd, buf, size)
9821 #undef read /* Get back the REAL read routine */
9823 register int total = 0;
9825 /* Read until the buffer is exhausted */
9827 /* Limit each read to 32KB */
9828 i = (size > (32*1024)) ? (32*1024) : size;
9829 i = read (fd, buf, i);
9831 if (i == 0) return (total);
9834 /* Account for this read */
9843 write (fd, buf, size)
9848 #undef write /* Get back the REAL write routine */
9852 /* Limit individual writes to 32Kb */
9855 j = (i > (32*1024)) ? (32*1024) : i;
9856 if (write (fd, buf, j) < 0) return (-1);
9857 /* Account for the data written */
9864 /* The following wrapper functions supply additional arguments to the VMS
9865 I/O routines to optimize performance with file handling. The arguments
9867 "mbc=16" - Set multi-block count to 16 (use a 8192 byte buffer).
9868 "deq=64" - When extending the file, extend it in chunks of 32Kbytes.
9869 "fop=tef"- Truncate unused portions of file when closing file.
9870 "shr=nil"- Disallow file sharing while file is open.
9874 freopen (fname, type, oldfile)
9879 #undef freopen /* Get back the REAL fopen routine */
9880 if (strcmp (type, "w") == 0)
9881 return freopen (fname, type, oldfile, "mbc=16", "deq=64", "fop=tef", "shr=nil");
9882 return freopen (fname, type, oldfile, "mbc=16");
9890 #undef fopen /* Get back the REAL fopen routine */
9891 if (strcmp (type, "w") == 0)
9892 return fopen (fname, type, "mbc=16", "deq=64", "fop=tef", "shr=nil");
9893 return fopen (fname, type, "mbc=16");
9897 open (fname, flags, prot)
9902 #undef open /* Get back the REAL open routine */
9903 return open (fname, flags, prot, "mbc=16", "deq=64", "fop=tef");
9906 /* Avoid run-time library bug, where copying M out of N+M characters with
9907 N >= 65535 results in VAXCRTL's strncat falling into an infinite loop.
9908 gcc-cpp exercises this particular bug. */
9911 strncat (dst, src, cnt)
9916 register char *d = dst, *s = (char *) src;
9917 register int n = cnt; /* convert to _signed_ type */
9919 while (*d) d++; /* advance to end */
9921 if (!(*d++ = *s++)) break;
9922 if (n < 0) *d = '\0';