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 /* Test if a sign is valid within a preprocessing number. */
26 #define VALID_SIGN(c, prevc) \
27 (((c) == '+' || (c) == '-') && \
28 ((prevc) == 'e' || (prevc) == 'E' \
29 || (((prevc) == 'p' || (prevc) == 'P') \
30 && CPP_OPTION (pfile, extended_numbers))))
33 #define ALIGN(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
34 #define POOL_FRONT(p) ((p)->cur->front)
35 #define POOL_LIMIT(p) ((p)->cur->limit)
36 #define POOL_BASE(p) ((p)->cur->base)
37 #define POOL_SIZE(p) ((p)->cur->limit - (p)->cur->base)
38 #define POOL_ROOM(p) ((p)->cur->limit - (p)->cur->front)
39 #define POOL_USED(p) ((p)->cur->front - (p)->cur->base)
40 #define POOL_COMMIT(p, len) do {((p)->cur->front += ALIGN (len, (p)->align));\
41 if ((p)->cur->front > (p)->cur->limit) abort ();} while (0)
43 typedef struct cpp_chunk cpp_chunk;
52 /* List of directories to look for include files in. */
55 struct file_name_list *next;
56 struct file_name_list *alloc; /* for the cache of
57 current directory entries */
60 /* We use these to tell if the directory mentioned here is a duplicate
61 of an earlier directory on the search path. */
64 /* If the following is nonzero, it is a C-language system include
67 /* Mapping of file names for this directory.
68 Only used on MS-DOS and related platforms. */
69 struct file_name_map *name_map;
71 #define ABSOLUTE_PATH ((struct file_name_list *)-1)
73 /* This structure is used for the table of all includes. */
76 const char *name; /* actual path name of file */
77 const cpp_hashnode *cmacro; /* macro, if any, preventing reinclusion. */
78 const struct file_name_list *foundhere;
79 /* location in search path where file was
80 found, for #include_next */
81 const unsigned char *buffer; /* pointer to cached file contents */
82 struct stat st; /* copy of stat(2) data for file */
83 int fd; /* fd open on file (short term storage only) */
84 unsigned short include_count; /* number of times file has been read */
85 unsigned short refcnt; /* number of stacked buffers using this file */
86 unsigned char sysp; /* file is a system header */
87 unsigned char mapped; /* file buffer is mmapped */
88 unsigned char defined; /* cmacro prevents inclusion in this state */
91 /* The cmacro works like this: If it's NULL, the file is to be
92 included again. If it's NEVER_REREAD, the file is never to be
93 included again. Otherwise it is a macro hashnode, and the file is
94 to be included again if the macro is defined or not as specified by
96 #define NEVER_REREAD ((const cpp_hashnode *)-1)
97 #define DO_NOT_REREAD(inc) \
98 ((inc)->cmacro && ((inc)->cmacro == NEVER_REREAD \
99 || ((inc)->cmacro->type == NT_MACRO) == (inc)->defined))
103 const unsigned char *cur; /* current position */
104 const unsigned char *rlimit; /* end of valid data */
105 const unsigned char *line_base; /* start of current line */
106 cppchar_t read_ahead; /* read ahead character */
107 cppchar_t extra_char; /* extra read-ahead for long tokens. */
109 struct cpp_reader *pfile; /* Owns this buffer. */
110 struct cpp_buffer *prev;
112 const unsigned char *buf; /* entire buffer */
114 /* Filename specified with #line command. */
115 const char *nominal_fname;
117 /* Actual directory of this file, used only for "" includes */
118 struct file_name_list *actual_dir;
120 /* Pointer into the include table. Used for include_next and
121 to record control macros. */
122 struct include_file *inc;
124 /* Value of if_stack at start of this file.
125 Used to prohibit unmatched #endif (etc) in an include file. */
126 struct if_stack *if_stack;
128 /* Token column position adjustment owing to tabs in whitespace. */
129 unsigned int col_adjust;
131 /* Line number at line_base (above). */
134 /* Because of the way the lexer works, -Wtrigraphs can sometimes
135 warn twice for the same trigraph. This helps prevent that. */
136 const unsigned char *last_Wtrigraphs;
138 /* True if we have already warned about C++ comments in this file.
139 The warning happens only for C89 extended mode with -pedantic on,
140 or for -Wtraditional, and only once per file (otherwise it would
141 be far too noisy). */
142 unsigned char warned_cplusplus_comments;
144 /* True if we don't process trigraphs and escaped newlines. True
145 for preprocessed input, command line directives, and _Pragma
147 unsigned char from_stage3;
149 /* Temporary storage for pfile->skipping whilst in a directive. */
150 unsigned char was_skipping;
153 /* Character classes.
154 If the definition of `numchar' looks odd to you, please look up the
155 definition of a pp-number in the C standard [section 6.4.8 of C99].
157 In the unlikely event that characters other than \r and \n enter
158 the set is_vspace, the macro handle_newline() in cpplex.c must be
160 #define ISidnum 0x01 /* a-zA-Z0-9_ */
161 #define ISidstart 0x02 /* _a-zA-Z */
162 #define ISnumstart 0x04 /* 0-9 */
163 #define IShspace 0x08 /* ' ' \t */
164 #define ISvspace 0x10 /* \r \n */
165 #define ISspace 0x20 /* ' ' \t \r \n \f \v \0 */
167 #define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
169 #define is_idchar(x) ((_cpp_IStable[x] & ISidnum) || _dollar_ok(x))
170 #define is_idstart(x) ((_cpp_IStable[x] & ISidstart) || _dollar_ok(x))
171 #define is_numchar(x) (_cpp_IStable[x] & ISidnum)
172 #define is_numstart(x) (_cpp_IStable[x] & ISnumstart)
173 #define is_hspace(x) (_cpp_IStable[x] & IShspace)
174 #define is_vspace(x) (_cpp_IStable[x] & ISvspace)
175 #define is_nvspace(x) ((_cpp_IStable[x] & (ISspace | ISvspace)) == ISspace)
176 #define is_space(x) (_cpp_IStable[x] & ISspace)
178 /* These tables are constant if they can be initialized at compile time,
179 which is the case if cpp was compiled with GCC >=2.7, or another
180 compiler that supports C99. */
181 #if HAVE_DESIGNATED_INITIALIZERS
182 extern const unsigned char _cpp_IStable[UCHAR_MAX + 1];
183 extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
185 extern unsigned char _cpp_IStable[UCHAR_MAX + 1];
186 extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
191 #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
192 #define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
193 #define CPP_IN_SYSTEM_HEADER(PFILE) \
194 (CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->inc \
195 && CPP_BUFFER (PFILE)->inc->sysp)
196 #define CPP_PEDANTIC(PF) \
197 CPP_OPTION (PF, pedantic)
198 #define CPP_WTRADITIONAL(PF) \
199 CPP_OPTION (PF, warn_traditional)
201 /* Hash step. The hash calculation is duplicated in cpp_lookup and
203 #define HASHSTEP(r, c) ((r) * 67 + (c - 113));
206 enum error_type { WARNING = 0, PEDWARN, ERROR, FATAL, ICE };
207 extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
208 const char *, const cpp_lexer_pos *));
211 extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
212 extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
213 extern void _cpp_pop_context PARAMS ((cpp_reader *));
214 extern void _cpp_free_lookaheads PARAMS ((cpp_reader *));
215 extern void _cpp_release_lookahead PARAMS ((cpp_reader *));
216 extern void _cpp_push_token PARAMS ((cpp_reader *, const cpp_token *,
217 const cpp_lexer_pos *));
220 extern void _cpp_init_hashtable PARAMS ((cpp_reader *));
221 extern void _cpp_cleanup_hashtable PARAMS ((cpp_reader *));
222 extern cpp_hashnode *_cpp_lookup_with_hash PARAMS ((cpp_reader*, size_t,
226 extern void _cpp_simplify_pathname PARAMS ((char *));
227 extern int _cpp_read_file PARAMS ((cpp_reader *, const char *));
228 extern void _cpp_execute_include PARAMS ((cpp_reader *,
229 const cpp_token *, int,
230 struct file_name_list *));
231 extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
233 extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
234 extern void _cpp_init_includes PARAMS ((cpp_reader *));
235 extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
236 extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *, cpp_buffer *));
239 extern int _cpp_parse_expr PARAMS ((cpp_reader *));
242 extern void _cpp_lex_token PARAMS ((cpp_reader *, cpp_token *));
243 extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
245 extern void _cpp_init_pool PARAMS ((cpp_pool *, unsigned int,
246 unsigned int, unsigned int));
247 extern void _cpp_free_pool PARAMS ((cpp_pool *));
248 extern unsigned char *_cpp_pool_reserve PARAMS ((cpp_pool *, unsigned int));
249 extern unsigned char *_cpp_pool_alloc PARAMS ((cpp_pool *, unsigned int));
250 extern unsigned char *_cpp_next_chunk PARAMS ((cpp_pool *, unsigned int,
252 extern void _cpp_lock_pool PARAMS ((cpp_pool *));
253 extern void _cpp_unlock_pool PARAMS ((cpp_pool *));
256 extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
257 extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
258 extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
259 extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
260 extern void _cpp_init_stacks PARAMS ((cpp_reader *));
261 extern void _cpp_cleanup_stacks PARAMS ((cpp_reader *));
262 extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
263 extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum cpp_fc_reason,
264 const char *, unsigned int));
266 /* Utility routines and macros. */
267 #define DSC(str) (const U_CHAR *)str, sizeof str - 1
268 #define xnew(T) (T *) xmalloc (sizeof(T))
269 #define xcnew(T) (T *) xcalloc (1, sizeof(T))
270 #define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
271 #define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
272 #define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))