1 /* Part of CPP library.
2 Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the
6 Free Software Foundation; either version 2, or (at your option) any
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* This header defines all the internal data structures and functions
19 that need to be visible across files. It's called cpphash.h for
20 historical reasons. */
22 #ifndef __GCC_CPPHASH__
23 #define __GCC_CPPHASH__
25 typedef unsigned char U_CHAR;
27 /* Structure allocated for every #define. For a simple replacement
30 nargs = -1, the `pattern' list is null, and the expansion is just
31 the replacement text. Nargs = 0 means a functionlike macro with no args,
33 #define getchar() getc (stdin) .
34 When there are args, the expansion is the replacement text with the
35 args squashed out, and the reflist is a list describing how to
36 build the output from the input: e.g., "3 chars, then the 1st arg,
37 then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
38 The chars here come from the expansion. Whatever is left of the
39 expansion after the last arg-occurrence is copied after that arg.
40 Note that the reflist can be arbitrarily long---
41 its length depends on the number of times the arguments appear in
42 the replacement text, not how many args there are. Example:
43 #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
45 { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
46 where (x, y) means (nchars, argno). */
51 char stringify; /* nonzero if this arg was preceded by a
53 char raw_before; /* Nonzero if a ## operator before arg. */
54 char raw_after; /* Nonzero if a ## operator after arg. */
55 char rest_args; /* Nonzero if this arg. absorbs the rest */
56 int nchars; /* Number of literal chars to copy before
57 this arg occurrence. */
58 int argno; /* Number of arg to substitute (origin-0) */
61 typedef struct definition DEFINITION;
65 int length; /* length of expansion string */
67 int line; /* Line number of definition */
69 const char *file; /* File of definition */
70 char rest_args; /* Nonzero if last arg. absorbs the rest */
71 struct reflist *pattern;
73 /* Names of macro args, concatenated in order with \0 between
74 them. The only use of this is that we warn on redefinition if
75 this differs between the old and new definitions. */
79 /* The structure of a node in the hash table. The hash table
80 has entries for all tokens defined by #define commands (type T_MACRO),
81 plus some special tokens like __LINE__ (these each have their own
82 type, and the appropriate code is run when that type of node is seen.
83 It does not contain control words like "#define", which are recognized
84 by a separate piece of code. */
86 /* different flavors of hash nodes */
89 T_SPECLINE, /* `__LINE__' */
90 T_DATE, /* `__DATE__' */
91 T_FILE, /* `__FILE__' */
92 T_BASE_FILE, /* `__BASE_FILE__' */
93 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
94 T_TIME, /* `__TIME__' */
95 T_STDC, /* `__STDC__' */
96 T_CONST, /* Constant string, used by `__SIZE_TYPE__' etc */
97 T_MCONST, /* Ditto, but the string is malloced memory */
98 T_MACRO, /* macro defined by `#define' */
99 T_DISABLED, /* macro temporarily turned off for rescan */
100 T_POISON, /* macro defined with `#pragma poison' */
101 T_EMPTY /* macro defined to nothing */
104 /* different kinds of things that can appear in the value field
108 const char *cpval; /* some predefined macros */
109 DEFINITION *defn; /* #define */
110 struct hashnode *aschain; /* #assert */
113 typedef struct hashnode HASHNODE;
116 const U_CHAR *name; /* the actual name */
117 size_t length; /* length of token, for quick comparison */
118 unsigned long hash; /* cached hash value */
119 union hashval value; /* pointer to expansion, or whatever */
120 enum node_type type; /* type of special token */
123 /* Directive flags. */
125 #define SYNTAX_INCLUDE (1 << 8)
126 #define SYNTAX_ASSERT (1 << 9)
127 typedef int (* directive_handler) PARAMS ((cpp_reader *));
129 /* List of directories to look for include files in. */
130 struct file_name_list
132 struct file_name_list *next;
133 struct file_name_list *alloc; /* for the cache of
134 current directory entries */
137 /* We use these to tell if the directory mentioned here is a duplicate
138 of an earlier directory on the search path. */
141 /* If the following is nonzero, it is a C-language system include
144 /* Mapping of file names for this directory.
145 Only used on MS-DOS and related platforms. */
146 struct file_name_map *name_map;
148 #define ABSOLUTE_PATH ((struct file_name_list *)-1)
150 /* This structure is used for the table of all includes. It is
151 indexed by the `short name' (the name as it appeared in the
152 #include statement) which is stored in *nshort. */
155 /* Next file with the same short name but a
156 different (partial) pathname). */
157 struct ihash *next_this_file;
159 /* Location of the file in the include search path.
160 Used for include_next */
161 struct file_name_list *foundhere;
163 unsigned long hash; /* save hash value for future reference */
164 const char *nshort; /* name of file as referenced in #include;
165 points into name[] */
166 const U_CHAR *control_macro; /* macro, if any, preventing reinclusion -
167 see redundant_include_p */
168 const char name[1]; /* (partial) pathname of file */
170 typedef struct ihash IHASH;
172 /* Character classes.
173 If the definition of `numchar' looks odd to you, please look up the
174 definition of a pp-number in the C standard [section 6.4.8 of C99] */
175 #define ISidnum 0x01 /* a-zA-Z0-9_ */
176 #define ISidstart 0x02 /* _a-zA-Z */
177 #define ISnumstart 0x04 /* 0-9 */
178 #define IShspace 0x08 /* ' ' \t \f \v */
179 #define ISspace 0x10 /* ' ' \t \f \v \n */
181 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
183 #define is_idchar(x) ((_cpp_IStable[x] & ISidnum) || _dollar_ok(x))
184 #define is_idstart(x) ((_cpp_IStable[x] & ISidstart) || _dollar_ok(x))
185 #define is_numchar(x) (_cpp_IStable[x] & ISidnum)
186 #define is_numstart(x) (_cpp_IStable[x] & ISnumstart)
187 #define is_hspace(x) (_cpp_IStable[x] & IShspace)
188 #define is_space(x) (_cpp_IStable[x] & ISspace)
190 /* This table is constant if it can be initialized at compile time,
191 which is the case if cpp was compiled with GCC >=2.7, or another
192 compiler that supports C99. */
193 #if (GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)
194 extern const unsigned char _cpp_IStable[256];
196 extern unsigned char _cpp_IStable[256];
201 /* One character lookahead in the input buffer. Note that if this
202 returns EOF, it does *not* necessarily mean the file's end has been
204 #define CPP_BUF_PEEK(BUFFER) \
205 ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
207 /* Make sure PFILE->token_buffer has space for at least N more characters. */
208 #define CPP_RESERVE(PFILE, N) \
209 (CPP_WRITTEN (PFILE) + (size_t)(N) > (PFILE)->token_buffer_size \
210 && (_cpp_grow_token_buffer (PFILE, N), 0))
212 /* Append string STR (of length N) to PFILE's output buffer.
213 Assume there is enough space. */
214 #define CPP_PUTS_Q(PFILE, STR, N) \
215 (memcpy ((PFILE)->limit, STR, (N)), (PFILE)->limit += (N))
216 /* Append string STR (of length N) to PFILE's output buffer. Make space. */
217 #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
218 /* Append character CH to PFILE's output buffer. Assume sufficient space. */
219 #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
220 /* Append character CH to PFILE's output buffer. Make space if need be. */
221 #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
223 /* Advance the current line by one. */
224 #define CPP_BUMP_BUFFER_LINE(PBUF) ((PBUF)->lineno++,\
225 (PBUF)->line_base = (PBUF)->cur)
226 #define CPP_BUMP_LINE(PFILE) CPP_BUMP_BUFFER_LINE(CPP_BUFFER(PFILE))
227 #define CPP_BUMP_BUFFER_LINE_CUR(PBUF, CUR) ((PBUF)->lineno++,\
228 (PBUF)->line_base = CUR)
229 #define CPP_BUMP_LINE_CUR(PFILE, CUR) \
230 CPP_BUMP_BUFFER_LINE_CUR(CPP_BUFFER(PFILE), CUR)
231 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
233 /* Are we in column 1 right now? Used mainly for -traditional handling
235 #define CPP_IN_COLUMN_1(PFILE) \
236 (CPP_BUFFER (PFILE)->cur - CPP_BUFFER (PFILE)->line_base == 1)
238 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
239 #define CPP_TRADITIONAL(PFILE) CPP_OPTION (PFILE, traditional)
240 #define CPP_PEDANTIC(PFILE) \
241 (CPP_OPTION (PFILE, pedantic) && !CPP_BUFFER (PFILE)->system_header_p)
242 #define CPP_WTRADITIONAL(PF) \
243 (CPP_OPTION (PF, warn_traditional) && !CPP_BUFFER (PF)->system_header_p)
245 /* CPP_IS_MACRO_BUFFER is true if the buffer contains macro expansion.
246 (Note that it is false while we're expanding macro *arguments*.) */
247 #define CPP_IS_MACRO_BUFFER(PBUF) ((PBUF)->macro != NULL)
249 /* Remember the current position of PFILE so it may be returned to
250 after looking ahead a bit.
252 Note that when you set a mark, you _must_ return to that mark. You
253 may not forget about it and continue parsing. You may not pop a
254 buffer with an active mark. You may not call CPP_BUMP_LINE while a
256 #define CPP_SET_BUF_MARK(IP) ((IP)->mark = (IP)->cur)
257 #define CPP_GOTO_BUF_MARK(IP) ((IP)->cur = (IP)->mark, (IP)->mark = 0)
258 #define CPP_SET_MARK(PFILE) CPP_SET_BUF_MARK(CPP_BUFFER(PFILE))
259 #define CPP_GOTO_MARK(PFILE) CPP_GOTO_BUF_MARK(CPP_BUFFER(PFILE))
261 /* ACTIVE_MARK_P is true if there's a live mark in the buffer. */
262 #define ACTIVE_MARK_P(PFILE) (CPP_BUFFER (PFILE)->mark != 0)
264 /* Are mark and point adjacent characters? Used mostly to deal with
265 the somewhat annoying semantic of #define. */
266 #define ADJACENT_TO_MARK(PFILE) \
267 (CPP_BUFFER(PFILE)->cur - CPP_BUFFER(PFILE)->mark == 1)
270 extern HASHNODE *_cpp_make_hashnode PARAMS ((const U_CHAR *, size_t,
273 extern unsigned int _cpp_calc_hash PARAMS ((const U_CHAR *, size_t));
274 extern HASHNODE *_cpp_lookup PARAMS ((cpp_reader *,
275 const U_CHAR *, int));
276 extern HASHNODE **_cpp_lookup_slot PARAMS ((cpp_reader *,
277 const U_CHAR *, int, int,
279 extern void _cpp_free_definition PARAMS ((DEFINITION *));
280 extern DEFINITION *_cpp_create_definition PARAMS ((cpp_reader *, int));
281 extern void _cpp_dump_definition PARAMS ((cpp_reader *, const U_CHAR *,
282 long, DEFINITION *));
283 extern int _cpp_compare_defs PARAMS ((cpp_reader *, DEFINITION *,
285 extern void _cpp_quote_string PARAMS ((cpp_reader *, const char *));
286 extern void _cpp_macroexpand PARAMS ((cpp_reader *, HASHNODE *));
287 extern void _cpp_init_macro_hash PARAMS ((cpp_reader *));
288 extern void _cpp_dump_macro_hash PARAMS ((cpp_reader *));
291 extern void _cpp_simplify_pathname PARAMS ((char *));
292 extern void _cpp_execute_include PARAMS ((cpp_reader *, char *,
294 struct file_name_list *));
295 extern void _cpp_init_include_hash PARAMS ((cpp_reader *));
296 extern const char *_cpp_fake_ihash PARAMS ((cpp_reader *, const char *));
299 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
302 extern void _cpp_parse_name PARAMS ((cpp_reader *, int));
303 extern void _cpp_skip_rest_of_line PARAMS ((cpp_reader *));
304 extern void _cpp_skip_hspace PARAMS ((cpp_reader *));
305 extern void _cpp_expand_to_buffer PARAMS ((cpp_reader *,
306 const unsigned char *, int));
307 extern int _cpp_parse_assertion PARAMS ((cpp_reader *));
308 extern enum cpp_ttype _cpp_lex_token PARAMS ((cpp_reader *));
309 extern long _cpp_read_and_prescan PARAMS ((cpp_reader *, cpp_buffer *,
311 extern void _cpp_init_input_buffer PARAMS ((cpp_reader *));
312 extern void _cpp_grow_token_buffer PARAMS ((cpp_reader *, long));
313 extern enum cpp_ttype _cpp_get_directive_token
314 PARAMS ((cpp_reader *));
315 extern enum cpp_ttype _cpp_get_define_token
316 PARAMS ((cpp_reader *));
319 extern int _cpp_handle_directive PARAMS ((cpp_reader *));
320 extern void _cpp_handle_eof PARAMS ((cpp_reader *));