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Commit | Line | Data |
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8f9b4009 | 1 | /* Part of CPP library. File handling. |
5793b276 | 2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, |
73e61092 | 3 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
add7091b ZW |
4 | Written by Per Bothner, 1994. |
5 | Based on CCCP program by Paul Rubin, June 1986 | |
6 | Adapted to ANSI C, Richard Stallman, Jan 1987 | |
7 | Split out of cpplib.c, Zack Weinberg, Oct 1998 | |
8f9b4009 | 8 | Reimplemented, Neil Booth, Jul 2003 |
add7091b ZW |
9 | |
10 | This program is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU General Public License as published by the | |
12 | Free Software Foundation; either version 2, or (at your option) any | |
13 | later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
e38992e8 | 22 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
add7091b ZW |
23 | |
24 | #include "config.h" | |
25 | #include "system.h" | |
add7091b | 26 | #include "cpplib.h" |
4f4e53dd | 27 | #include "internal.h" |
168d3732 | 28 | #include "mkdeps.h" |
bf42e45b | 29 | #include "hashtab.h" |
73e61092 | 30 | #include "md5.h" |
8f9b4009 | 31 | #include <dirent.h> |
f8f769ea | 32 | |
8f9b4009 NB |
33 | /* Variable length record files on VMS will have a stat size that includes |
34 | record control characters that won't be included in the read size. */ | |
35 | #ifdef VMS | |
36 | # define FAB_C_VAR 2 /* variable length records (see Starlet fabdef.h) */ | |
37 | # define STAT_SIZE_RELIABLE(ST) ((ST).st_fab_rfm != FAB_C_VAR) | |
38 | #else | |
39 | # define STAT_SIZE_RELIABLE(ST) true | |
d7a2e0f7 ZW |
40 | #endif |
41 | ||
8f9b4009 NB |
42 | #ifdef __DJGPP__ |
43 | /* For DJGPP redirected input is opened in text mode. */ | |
44 | # define set_stdin_to_binary_mode() \ | |
45 | if (! isatty (0)) setmode (0, O_BINARY) | |
46 | #else | |
47 | # define set_stdin_to_binary_mode() /* Nothing */ | |
48 | #endif | |
49 | ||
8f9b4009 NB |
50 | /* This structure represents a file searched for by CPP, whether it |
51 | exists or not. An instance may be pointed to by more than one | |
52 | file_hash_entry; at present no reference count is kept. */ | |
8f9b4009 NB |
53 | struct _cpp_file |
54 | { | |
55 | /* Filename as given to #include or command line switch. */ | |
56 | const char *name; | |
642ce434 | 57 | |
8f9b4009 NB |
58 | /* The full path used to find the file. */ |
59 | const char *path; | |
ae1139f9 | 60 | |
8f9b4009 NB |
61 | /* The full path of the pch file. */ |
62 | const char *pchname; | |
add7091b | 63 | |
bf42e45b NB |
64 | /* The file's path with the basename stripped. NULL if it hasn't |
65 | been calculated yet. */ | |
8f9b4009 | 66 | const char *dir_name; |
c71f835b | 67 | |
49634b3a NB |
68 | /* Chain through all files. */ |
69 | struct _cpp_file *next_file; | |
a36c54fa | 70 | |
8f9b4009 NB |
71 | /* The contents of NAME after calling read_file(). */ |
72 | const uchar *buffer; | |
a36c54fa | 73 | |
8f9b4009 NB |
74 | /* The macro, if any, preventing re-inclusion. */ |
75 | const cpp_hashnode *cmacro; | |
642ce434 | 76 | |
8f9b4009 NB |
77 | /* The directory in the search path where FILE was found. Used for |
78 | #include_next and determining whether a header is a system | |
bf42e45b | 79 | header. */ |
8f9b4009 | 80 | cpp_dir *dir; |
a36c54fa | 81 | |
8f9b4009 NB |
82 | /* As filled in by stat(2) for the file. */ |
83 | struct stat st; | |
a36c54fa | 84 | |
8f9b4009 NB |
85 | /* File descriptor. Invalid if -1, otherwise open. */ |
86 | int fd; | |
d6d52dd6 | 87 | |
8f9b4009 NB |
88 | /* Zero if this file was successfully opened and stat()-ed, |
89 | otherwise errno obtained from failure. */ | |
90 | int err_no; | |
add7091b | 91 | |
8f9b4009 NB |
92 | /* Number of times the file has been stacked for preprocessing. */ |
93 | unsigned short stack_count; | |
2047e26f | 94 | |
49634b3a NB |
95 | /* If opened with #import or contains #pragma once. */ |
96 | bool once_only; | |
add7091b | 97 | |
8f9b4009 NB |
98 | /* If read() failed before. */ |
99 | bool dont_read; | |
add7091b | 100 | |
8f9b4009 NB |
101 | /* If this file is the main file. */ |
102 | bool main_file; | |
add7091b | 103 | |
8f9b4009 NB |
104 | /* If BUFFER above contains the true contents of the file. */ |
105 | bool buffer_valid; | |
b0699dad | 106 | |
a1105617 | 107 | /* File is a PCH (on return from find_include_file). */ |
22234f56 | 108 | bool pch; |
8f9b4009 | 109 | }; |
d4506961 | 110 | |
8f9b4009 NB |
111 | /* A singly-linked list for all searches for a given file name, with |
112 | its head pointed to by a slot in FILE_HASH. The file name is what | |
113 | appeared between the quotes in a #include directive; it can be | |
a98ebe2e | 114 | determined implicitly from the hash table location or explicitly |
bf42e45b | 115 | from FILE->name. |
8f9b4009 NB |
116 | |
117 | FILE is a structure containing details about the file that was | |
118 | found with that search, or details of how the search failed. | |
119 | ||
120 | START_DIR is the starting location of the search in the include | |
121 | chain. The current directories for "" includes are also hashed in | |
bf42e45b NB |
122 | the hash table and therefore unique. Files that are looked up |
123 | without using a search path, such as absolute filenames and file | |
124 | names from the command line share a special starting directory so | |
125 | they don't cause cache hits with normal include-chain lookups. | |
8f9b4009 NB |
126 | |
127 | If START_DIR is NULL then the entry is for a directory, not a file, | |
128 | and the directory is in DIR. Since the starting point in a file | |
129 | lookup chain is never NULL, this means that simple pointer | |
130 | comparisons against START_DIR can be made to determine cache hits | |
131 | in file lookups. | |
bf42e45b NB |
132 | |
133 | If a cache lookup fails because of e.g. an extra "./" in the path, | |
134 | then nothing will break. It is just less efficient as CPP will | |
135 | have to do more work re-preprocessing the file, and/or comparing | |
136 | its contents against earlier once-only files. | |
8f9b4009 NB |
137 | */ |
138 | struct file_hash_entry | |
139 | { | |
140 | struct file_hash_entry *next; | |
141 | cpp_dir *start_dir; | |
142 | union | |
143 | { | |
144 | _cpp_file *file; | |
145 | cpp_dir *dir; | |
146 | } u; | |
147 | }; | |
148 | ||
149 | static bool open_file (_cpp_file *file); | |
3d67ba1e GK |
150 | static bool pch_open_file (cpp_reader *pfile, _cpp_file *file, |
151 | bool *invalid_pch); | |
152 | static bool find_file_in_dir (cpp_reader *pfile, _cpp_file *file, | |
153 | bool *invalid_pch); | |
8f9b4009 NB |
154 | static bool read_file_guts (cpp_reader *pfile, _cpp_file *file); |
155 | static bool read_file (cpp_reader *pfile, _cpp_file *file); | |
cf1ee30c | 156 | static bool should_stack_file (cpp_reader *, _cpp_file *file, bool import); |
8f9b4009 NB |
157 | static struct cpp_dir *search_path_head (cpp_reader *, const char *fname, |
158 | int angle_brackets, enum include_type); | |
159 | static const char *dir_name_of_file (_cpp_file *file); | |
160 | static void open_file_failed (cpp_reader *pfile, _cpp_file *file); | |
161 | static struct file_hash_entry *search_cache (struct file_hash_entry *head, | |
162 | const cpp_dir *start_dir); | |
163 | static _cpp_file *make_cpp_file (cpp_reader *, cpp_dir *, const char *fname); | |
164 | static cpp_dir *make_cpp_dir (cpp_reader *, const char *dir_name, int sysp); | |
165 | static void allocate_file_hash_entries (cpp_reader *pfile); | |
166 | static struct file_hash_entry *new_file_hash_entry (cpp_reader *pfile); | |
167 | static int report_missing_guard (void **slot, void *b); | |
b92be669 PB |
168 | static hashval_t file_hash_hash (const void *p); |
169 | static int file_hash_eq (const void *p, const void *q); | |
8f9b4009 NB |
170 | static char *read_filename_string (int ch, FILE *f); |
171 | static void read_name_map (cpp_dir *dir); | |
172 | static char *remap_filename (cpp_reader *pfile, _cpp_file *file); | |
173 | static char *append_file_to_dir (const char *fname, cpp_dir *dir); | |
174 | static bool validate_pch (cpp_reader *, _cpp_file *file, const char *pchname); | |
73e61092 GK |
175 | static int pchf_adder (void **slot, void *data); |
176 | static int pchf_save_compare (const void *e1, const void *e2); | |
177 | static int pchf_compare (const void *d_p, const void *e_p); | |
178 | static bool check_file_against_entries (cpp_reader *, _cpp_file *, bool); | |
8f9b4009 NB |
179 | |
180 | /* Given a filename in FILE->PATH, with the empty string interpreted | |
181 | as <stdin>, open it. | |
182 | ||
183 | On success FILE contains an open file descriptor and stat | |
184 | information for the file. On failure the file descriptor is -1 and | |
185 | the appropriate errno is also stored in FILE. Returns TRUE iff | |
186 | successful. | |
187 | ||
188 | We used to open files in nonblocking mode, but that caused more | |
189 | problems than it solved. Do take care not to acquire a controlling | |
190 | terminal by mistake (this can't happen on sane systems, but | |
191 | paranoia is a virtue). | |
192 | ||
193 | Use the three-argument form of open even though we aren't | |
194 | specifying O_CREAT, to defend against broken system headers. | |
195 | ||
196 | O_BINARY tells some runtime libraries (notably DJGPP) not to do | |
197 | newline translation; we can handle DOS line breaks just fine | |
198 | ourselves. */ | |
199 | static bool | |
200 | open_file (_cpp_file *file) | |
201 | { | |
202 | if (file->path[0] == '\0') | |
85be8c2d AP |
203 | { |
204 | file->fd = 0; | |
8f9b4009 | 205 | set_stdin_to_binary_mode (); |
85be8c2d | 206 | } |
f2d5f0cc | 207 | else |
8f9b4009 | 208 | file->fd = open (file->path, O_RDONLY | O_NOCTTY | O_BINARY, 0666); |
a58d32c2 | 209 | |
8f9b4009 | 210 | if (file->fd != -1) |
2047e26f | 211 | { |
8f9b4009 NB |
212 | if (fstat (file->fd, &file->st) == 0) |
213 | { | |
214 | if (!S_ISDIR (file->st.st_mode)) | |
215 | { | |
216 | file->err_no = 0; | |
217 | return true; | |
218 | } | |
219 | ||
220 | /* Ignore a directory and continue the search. The file we're | |
221 | looking for may be elsewhere in the search path. */ | |
222 | errno = ENOENT; | |
223 | } | |
55485cd9 | 224 | |
55485cd9 ZW |
225 | close (file->fd); |
226 | file->fd = -1; | |
2047e26f | 227 | } |
a54c550f NB |
228 | else if (errno == ENOTDIR) |
229 | errno = ENOENT; | |
a58d32c2 | 230 | |
f277b5e0 | 231 | file->err_no = errno; |
8f9b4009 NB |
232 | |
233 | return false; | |
a58d32c2 ZW |
234 | } |
235 | ||
3d67ba1e GK |
236 | /* Temporary PCH intercept of opening a file. Try to find a PCH file |
237 | based on FILE->name and FILE->dir, and test those found for | |
238 | validity using PFILE->cb.valid_pch. Return true iff a valid file is | |
239 | found. Set *INVALID_PCH if a PCH file is found but wasn't valid. */ | |
240 | ||
8f9b4009 | 241 | static bool |
3d67ba1e | 242 | pch_open_file (cpp_reader *pfile, _cpp_file *file, bool *invalid_pch) |
17211ab5 | 243 | { |
8f9b4009 NB |
244 | static const char extension[] = ".gch"; |
245 | const char *path = file->path; | |
246 | size_t len, flen; | |
247 | char *pchname; | |
248 | struct stat st; | |
249 | bool valid = false; | |
250 | ||
251 | /* No PCH on <stdin> or if not requested. */ | |
252 | if (file->name[0] == '\0' || !pfile->cb.valid_pch) | |
253 | return false; | |
17211ab5 | 254 | |
8f9b4009 NB |
255 | flen = strlen (path); |
256 | len = flen + sizeof (extension); | |
257 | pchname = xmalloc (len); | |
258 | memcpy (pchname, path, flen); | |
259 | memcpy (pchname + flen, extension, sizeof (extension)); | |
17211ab5 | 260 | |
8f9b4009 | 261 | if (stat (pchname, &st) == 0) |
17211ab5 | 262 | { |
8f9b4009 NB |
263 | DIR *pchdir; |
264 | struct dirent *d; | |
265 | size_t dlen, plen = len; | |
266 | ||
267 | if (!S_ISDIR (st.st_mode)) | |
268 | valid = validate_pch (pfile, file, pchname); | |
269 | else if ((pchdir = opendir (pchname)) != NULL) | |
17211ab5 | 270 | { |
8f9b4009 NB |
271 | pchname[plen - 1] = '/'; |
272 | while ((d = readdir (pchdir)) != NULL) | |
8d973a83 | 273 | { |
8f9b4009 | 274 | dlen = strlen (d->d_name) + 1; |
230fcd32 PE |
275 | if ((strcmp (d->d_name, ".") == 0) |
276 | || (strcmp (d->d_name, "..") == 0)) | |
277 | continue; | |
8f9b4009 | 278 | if (dlen + plen > len) |
17211ab5 | 279 | { |
8f9b4009 NB |
280 | len += dlen + 64; |
281 | pchname = xrealloc (pchname, len); | |
17211ab5 | 282 | } |
8f9b4009 NB |
283 | memcpy (pchname + plen, d->d_name, dlen); |
284 | valid = validate_pch (pfile, file, pchname); | |
285 | if (valid) | |
8d973a83 | 286 | break; |
17211ab5 | 287 | } |
8f9b4009 | 288 | closedir (pchdir); |
17211ab5 | 289 | } |
bcad4ca2 RS |
290 | if (valid) |
291 | file->pch = true; | |
292 | else | |
293 | *invalid_pch = true; | |
17211ab5 | 294 | } |
8d973a83 | 295 | |
8f9b4009 NB |
296 | if (valid) |
297 | file->pchname = pchname; | |
298 | else | |
299 | free (pchname); | |
300 | ||
301 | return valid; | |
17211ab5 GK |
302 | } |
303 | ||
8f9b4009 | 304 | /* Try to open the path FILE->name appended to FILE->dir. This is |
cf1ee30c | 305 | where remap and PCH intercept the file lookup process. Return true |
16dd5cfe | 306 | if the file was found, whether or not the open was successful. |
3d67ba1e GK |
307 | Set *INVALID_PCH to true if a PCH file is found but wasn't valid. */ |
308 | ||
e5eba70a | 309 | static bool |
3d67ba1e | 310 | find_file_in_dir (cpp_reader *pfile, _cpp_file *file, bool *invalid_pch) |
a58d32c2 | 311 | { |
8f9b4009 | 312 | char *path; |
51d0f328 | 313 | |
8f9b4009 NB |
314 | if (CPP_OPTION (pfile, remap) && (path = remap_filename (pfile, file))) |
315 | ; | |
316 | else | |
94d1613b MS |
317 | if (file->dir->construct) |
318 | path = file->dir->construct (file->name, file->dir); | |
319 | else | |
320 | path = append_file_to_dir (file->name, file->dir); | |
e5eba70a | 321 | |
94d1613b MS |
322 | if (path) |
323 | { | |
324 | file->path = path; | |
325 | if (pch_open_file (pfile, file, invalid_pch)) | |
326 | return true; | |
51d0f328 | 327 | |
94d1613b MS |
328 | if (open_file (file)) |
329 | return true; | |
330 | ||
331 | if (file->err_no != ENOENT) | |
332 | { | |
333 | open_file_failed (pfile, file); | |
334 | return true; | |
335 | } | |
336 | ||
337 | free (path); | |
338 | file->path = file->name; | |
339 | } | |
340 | else | |
341 | { | |
342 | file->err_no = ENOENT; | |
343 | file->path = NULL; | |
344 | } | |
345 | ||
346 | return false; | |
347 | } | |
51d0f328 | 348 | |
94d1613b MS |
349 | /* Return tue iff the missing_header callback found the given HEADER. */ |
350 | static bool | |
351 | search_path_exhausted (cpp_reader *pfile, const char *header, _cpp_file *file) | |
352 | { | |
353 | missing_header_cb func = pfile->cb.missing_header; | |
354 | ||
355 | /* When the regular search path doesn't work, try context dependent | |
356 | headers search paths. */ | |
357 | if (func | |
358 | && file->dir == NULL) | |
cf1ee30c | 359 | { |
e3c287c9 | 360 | if ((file->path = func (pfile, header, &file->dir)) != NULL) |
94d1613b MS |
361 | { |
362 | if (open_file (file)) | |
363 | return true; | |
364 | free ((void *)file->path); | |
365 | } | |
366 | file->path = file->name; | |
cf1ee30c NB |
367 | } |
368 | ||
8f9b4009 NB |
369 | return false; |
370 | } | |
371 | ||
4dc299fb PB |
372 | bool |
373 | _cpp_find_failed (_cpp_file *file) | |
374 | { | |
375 | return file->err_no != 0; | |
376 | } | |
377 | ||
8f9b4009 NB |
378 | /* Given a filename FNAME search for such a file in the include path |
379 | starting from START_DIR. If FNAME is the empty string it is | |
1ae58c30 | 380 | interpreted as STDIN if START_DIR is PFILE->no_search_path. |
8f9b4009 NB |
381 | |
382 | If the file is not found in the file cache fall back to the O/S and | |
383 | add the result to our cache. | |
384 | ||
385 | If the file was not found in the filesystem, or there was an error | |
02fa63cd | 386 | opening it, then ERR_NO is nonzero and FD is -1. If the file was |
8f9b4009 NB |
387 | found, then ERR_NO is zero and FD could be -1 or an open file |
388 | descriptor. FD can be -1 if the file was found in the cache and | |
389 | had previously been closed. To open it again pass the return value | |
390 | to open_file(). | |
391 | */ | |
4dc299fb PB |
392 | _cpp_file * |
393 | _cpp_find_file (cpp_reader *pfile, const char *fname, cpp_dir *start_dir, bool fake) | |
8f9b4009 NB |
394 | { |
395 | struct file_hash_entry *entry, **hash_slot; | |
396 | _cpp_file *file; | |
3d67ba1e | 397 | bool invalid_pch = false; |
8f9b4009 NB |
398 | |
399 | /* Ensure we get no confusion between cached files and directories. */ | |
400 | if (start_dir == NULL) | |
0527bc4e | 401 | cpp_error (pfile, CPP_DL_ICE, "NULL directory in find_file"); |
8f9b4009 NB |
402 | |
403 | hash_slot = (struct file_hash_entry **) | |
b92be669 PB |
404 | htab_find_slot_with_hash (pfile->file_hash, fname, |
405 | htab_hash_string (fname), | |
406 | INSERT); | |
17211ab5 | 407 | |
8f9b4009 NB |
408 | /* First check the cache before we resort to memory allocation. */ |
409 | entry = search_cache (*hash_slot, start_dir); | |
410 | if (entry) | |
411 | return entry->u.file; | |
412 | ||
413 | file = make_cpp_file (pfile, start_dir, fname); | |
414 | ||
415 | /* Try each path in the include chain. */ | |
416 | for (; !fake ;) | |
7c092714 | 417 | { |
3d67ba1e | 418 | if (find_file_in_dir (pfile, file, &invalid_pch)) |
8f9b4009 NB |
419 | break; |
420 | ||
cf1ee30c NB |
421 | file->dir = file->dir->next; |
422 | if (file->dir == NULL) | |
e5eba70a | 423 | { |
94d1613b MS |
424 | if (search_path_exhausted (pfile, fname, file)) |
425 | return file; | |
426 | ||
8f9b4009 | 427 | open_file_failed (pfile, file); |
3d67ba1e GK |
428 | if (invalid_pch) |
429 | { | |
16dd5cfe | 430 | cpp_error (pfile, CPP_DL_ERROR, |
e235d8bf GK |
431 | "one or more PCH files were found, but they were invalid"); |
432 | if (!cpp_get_options (pfile)->warn_invalid_pch) | |
16dd5cfe | 433 | cpp_error (pfile, CPP_DL_ERROR, |
e235d8bf | 434 | "use -Winvalid-pch for more information"); |
3d67ba1e | 435 | } |
8f9b4009 | 436 | break; |
e5eba70a | 437 | } |
eb1f4d9d | 438 | |
8f9b4009 NB |
439 | /* Only check the cache for the starting location (done above) |
440 | and the quote and bracket chain heads because there are no | |
441 | other possible starting points for searches. */ | |
442 | if (file->dir != pfile->bracket_include | |
443 | && file->dir != pfile->quote_include) | |
444 | continue; | |
a58d32c2 | 445 | |
8f9b4009 NB |
446 | entry = search_cache (*hash_slot, file->dir); |
447 | if (entry) | |
49634b3a NB |
448 | break; |
449 | } | |
450 | ||
451 | if (entry) | |
452 | { | |
453 | /* Cache for START_DIR too, sharing the _cpp_file structure. */ | |
454 | free ((char *) file->name); | |
455 | free (file); | |
456 | file = entry->u.file; | |
457 | } | |
458 | else | |
459 | { | |
460 | /* This is a new file; put it in the list. */ | |
461 | file->next_file = pfile->all_files; | |
462 | pfile->all_files = file; | |
8f9b4009 | 463 | } |
eb1f4d9d | 464 | |
8f9b4009 NB |
465 | /* Store this new result in the hash table. */ |
466 | entry = new_file_hash_entry (pfile); | |
467 | entry->next = *hash_slot; | |
468 | entry->start_dir = start_dir; | |
469 | entry->u.file = file; | |
470 | *hash_slot = entry; | |
e5eba70a | 471 | |
8f9b4009 | 472 | return file; |
a58d32c2 ZW |
473 | } |
474 | ||
8f9b4009 | 475 | /* Read a file into FILE->buffer, returning true on success. |
a58d32c2 | 476 | |
8f9b4009 NB |
477 | If FILE->fd is something weird, like a block device, we don't want |
478 | to read it at all. Don't even try to figure out what something is, | |
479 | except for plain files and block devices, since there is no | |
480 | reliable portable way of doing this. | |
a58d32c2 ZW |
481 | |
482 | FIXME: Flush file cache and try again if we run out of memory. */ | |
8f9b4009 NB |
483 | static bool |
484 | read_file_guts (cpp_reader *pfile, _cpp_file *file) | |
a58d32c2 | 485 | { |
8f9b4009 | 486 | ssize_t size, total, count; |
562a5c27 | 487 | uchar *buf; |
8f9b4009 | 488 | bool regular; |
16dd5cfe | 489 | |
8f9b4009 NB |
490 | if (S_ISBLK (file->st.st_mode)) |
491 | { | |
0527bc4e | 492 | cpp_error (pfile, CPP_DL_ERROR, "%s is a block device", file->path); |
8f9b4009 NB |
493 | return false; |
494 | } | |
a58d32c2 | 495 | |
8f9b4009 NB |
496 | regular = S_ISREG (file->st.st_mode); |
497 | if (regular) | |
f2d5f0cc | 498 | { |
a58d32c2 ZW |
499 | /* off_t might have a wider range than ssize_t - in other words, |
500 | the max size of a file might be bigger than the address | |
501 | space. We can't handle a file that large. (Anyone with | |
502 | a single source file bigger than 2GB needs to rethink | |
503 | their coding style.) Some systems (e.g. AIX 4.1) define | |
504 | SSIZE_MAX to be much smaller than the actual range of the | |
505 | type. Use INTTYPE_MAXIMUM unconditionally to ensure this | |
506 | does not bite us. */ | |
8f9b4009 | 507 | if (file->st.st_size > INTTYPE_MAXIMUM (ssize_t)) |
f2d5f0cc | 508 | { |
0527bc4e | 509 | cpp_error (pfile, CPP_DL_ERROR, "%s is too large", file->path); |
8f9b4009 | 510 | return false; |
f2d5f0cc | 511 | } |
a58d32c2 | 512 | |
8f9b4009 NB |
513 | size = file->st.st_size; |
514 | } | |
515 | else | |
516 | /* 8 kilobytes is a sensible starting size. It ought to be bigger | |
517 | than the kernel pipe buffer, and it's definitely bigger than | |
518 | the majority of C source files. */ | |
519 | size = 8 * 1024; | |
520 | ||
521 | buf = xmalloc (size + 1); | |
522 | total = 0; | |
523 | while ((count = read (file->fd, buf + total, size - total)) > 0) | |
524 | { | |
525 | total += count; | |
526 | ||
527 | if (total == size) | |
d4506961 | 528 | { |
8f9b4009 NB |
529 | if (regular) |
530 | break; | |
531 | size *= 2; | |
532 | buf = xrealloc (buf, size + 1); | |
d4506961 | 533 | } |
a58d32c2 | 534 | } |
8f9b4009 NB |
535 | |
536 | if (count < 0) | |
a58d32c2 | 537 | { |
0527bc4e | 538 | cpp_errno (pfile, CPP_DL_ERROR, file->path); |
8f9b4009 | 539 | return false; |
a58d32c2 | 540 | } |
8f9b4009 NB |
541 | |
542 | if (regular && total != size && STAT_SIZE_RELIABLE (file->st)) | |
0527bc4e JDA |
543 | cpp_error (pfile, CPP_DL_WARNING, |
544 | "%s is shorter than expected", file->path); | |
8f9b4009 | 545 | |
16dd5cfe EC |
546 | file->buffer = _cpp_convert_input (pfile, CPP_OPTION (pfile, input_charset), |
547 | buf, size, total, &file->st.st_size); | |
8f9b4009 NB |
548 | file->buffer_valid = true; |
549 | ||
550 | return true; | |
551 | } | |
552 | ||
553 | /* Convenience wrapper around read_file_guts that opens the file if | |
a98ebe2e | 554 | necessary and closes the file descriptor after reading. FILE must |
8f9b4009 NB |
555 | have been passed through find_file() at some stage. */ |
556 | static bool | |
557 | read_file (cpp_reader *pfile, _cpp_file *file) | |
558 | { | |
8f9b4009 NB |
559 | /* If we already have its contents in memory, succeed immediately. */ |
560 | if (file->buffer_valid) | |
561 | return true; | |
a58d32c2 | 562 | |
8f9b4009 NB |
563 | /* If an earlier read failed for some reason don't try again. */ |
564 | if (file->dont_read || file->err_no) | |
565 | return false; | |
4d6baafa | 566 | |
8f9b4009 NB |
567 | if (file->fd == -1 && !open_file (file)) |
568 | { | |
569 | open_file_failed (pfile, file); | |
570 | return false; | |
f2d5f0cc | 571 | } |
d7a2e0f7 | 572 | |
8f9b4009 NB |
573 | file->dont_read = !read_file_guts (pfile, file); |
574 | close (file->fd); | |
575 | file->fd = -1; | |
a58d32c2 | 576 | |
8f9b4009 | 577 | return !file->dont_read; |
a58d32c2 ZW |
578 | } |
579 | ||
cf1ee30c NB |
580 | /* Returns TRUE if FILE's contents have been successfully placed in |
581 | FILE->buffer and the file should be stacked, otherwise false. */ | |
8f9b4009 | 582 | static bool |
cf1ee30c | 583 | should_stack_file (cpp_reader *pfile, _cpp_file *file, bool import) |
a58d32c2 | 584 | { |
cf1ee30c | 585 | _cpp_file *f; |
8f9b4009 | 586 | |
49634b3a NB |
587 | /* Skip once-only files. */ |
588 | if (file->once_only) | |
589 | return false; | |
590 | ||
16dd5cfe | 591 | /* We must mark the file once-only if #import now, before header |
49634b3a NB |
592 | guard checks. Otherwise, undefining the header guard might |
593 | cause the file to be re-stacked. */ | |
594 | if (import) | |
595 | { | |
596 | _cpp_mark_file_once_only (pfile, file); | |
597 | ||
598 | /* Don't stack files that have been stacked before. */ | |
599 | if (file->stack_count) | |
600 | return false; | |
601 | } | |
602 | ||
cf1ee30c NB |
603 | /* Skip if the file had a header guard and the macro is defined. |
604 | PCH relies on this appearing before the PCH handler below. */ | |
605 | if (file->cmacro && file->cmacro->type == NT_MACRO) | |
bf42e45b NB |
606 | return false; |
607 | ||
cf1ee30c | 608 | /* Handle PCH files immediately; don't stack them. */ |
22234f56 | 609 | if (file->pch) |
c31a6508 | 610 | { |
cf1ee30c NB |
611 | pfile->cb.read_pch (pfile, file->path, file->fd, file->pchname); |
612 | close (file->fd); | |
613 | file->fd = -1; | |
614 | return false; | |
c31a6508 | 615 | } |
8f9b4009 | 616 | |
8f9b4009 NB |
617 | if (!read_file (pfile, file)) |
618 | return false; | |
c31a6508 | 619 | |
73e61092 GK |
620 | /* Check the file against the PCH file. This is done before |
621 | checking against files we've already seen, since it may save on | |
622 | I/O. */ | |
623 | if (check_file_against_entries (pfile, file, import)) | |
624 | { | |
625 | /* If this isn't a #import, but yet we can't include the file, | |
626 | that means that it was #import-ed in the PCH file, | |
627 | so we can never include it again. */ | |
628 | if (! import) | |
629 | _cpp_mark_file_once_only (pfile, file); | |
630 | return false; | |
631 | } | |
632 | ||
49634b3a NB |
633 | /* Now we've read the file's contents, we can stack it if there |
634 | are no once-only files. */ | |
635 | if (!pfile->seen_once_only) | |
cf1ee30c NB |
636 | return true; |
637 | ||
49634b3a | 638 | /* We may have read the file under a different name. Look |
8f9b4009 | 639 | for likely candidates and compare file contents to be sure. */ |
49634b3a | 640 | for (f = pfile->all_files; f; f = f->next_file) |
8f9b4009 NB |
641 | { |
642 | if (f == file) | |
643 | continue; | |
644 | ||
49634b3a NB |
645 | if ((import || f->once_only) |
646 | && f->err_no == 0 | |
8f9b4009 NB |
647 | && f->st.st_mtime == file->st.st_mtime |
648 | && f->st.st_size == file->st.st_size | |
649 | && read_file (pfile, f) | |
650 | /* Size might have changed in read_file(). */ | |
651 | && f->st.st_size == file->st.st_size | |
652 | && !memcmp (f->buffer, file->buffer, f->st.st_size)) | |
bf42e45b | 653 | break; |
0b3d776a | 654 | } |
8f9b4009 | 655 | |
cf1ee30c NB |
656 | return f == NULL; |
657 | } | |
658 | ||
659 | /* Place the file referenced by FILE into a new buffer on the buffer | |
660 | stack if possible. IMPORT is true if this stacking attempt is | |
661 | because of a #import directive. Returns true if a buffer is | |
662 | stacked. */ | |
4dc299fb PB |
663 | bool |
664 | _cpp_stack_file (cpp_reader *pfile, _cpp_file *file, bool import) | |
cf1ee30c NB |
665 | { |
666 | cpp_buffer *buffer; | |
667 | int sysp; | |
668 | ||
669 | if (!should_stack_file (pfile, file, import)) | |
670 | return false; | |
671 | ||
12f9df4e PB |
672 | if (pfile->buffer == NULL || file->dir == NULL) |
673 | sysp = 0; | |
674 | else | |
675 | sysp = MAX (pfile->buffer->sysp, file->dir->sysp); | |
cf1ee30c NB |
676 | |
677 | /* Add the file to the dependencies on its first inclusion. */ | |
678 | if (CPP_OPTION (pfile, deps.style) > !!sysp && !file->stack_count) | |
679 | { | |
680 | if (!file->main_file || !CPP_OPTION (pfile, deps.ignore_main_file)) | |
681 | deps_add_dep (pfile->deps, file->path); | |
682 | } | |
683 | ||
684 | /* Clear buffer_valid since _cpp_clean_line messes it up. */ | |
685 | file->buffer_valid = false; | |
686 | file->stack_count++; | |
687 | ||
688 | /* Stack the buffer. */ | |
689 | buffer = cpp_push_buffer (pfile, file->buffer, file->st.st_size, | |
4dc299fb | 690 | CPP_OPTION (pfile, preprocessed)); |
cf1ee30c | 691 | buffer->file = file; |
12f9df4e | 692 | buffer->sysp = sysp; |
cf1ee30c NB |
693 | |
694 | /* Initialize controlling macro state. */ | |
695 | pfile->mi_valid = true; | |
696 | pfile->mi_cmacro = 0; | |
697 | ||
698 | /* Generate the call back. */ | |
76bf2c97 | 699 | _cpp_do_file_change (pfile, LC_ENTER, file->path, 1, sysp); |
cf1ee30c NB |
700 | |
701 | return true; | |
add7091b ZW |
702 | } |
703 | ||
49634b3a | 704 | /* Mark FILE to be included once only. */ |
8f9b4009 | 705 | void |
49634b3a | 706 | _cpp_mark_file_once_only (cpp_reader *pfile, _cpp_file *file) |
f2d5f0cc | 707 | { |
49634b3a NB |
708 | pfile->seen_once_only = true; |
709 | file->once_only = true; | |
8f9b4009 NB |
710 | } |
711 | ||
712 | /* Return the directory from which searching for FNAME should start, | |
2067c116 | 713 | considering the directive TYPE and ANGLE_BRACKETS. If there is |
8f9b4009 NB |
714 | nothing left in the path, returns NULL. */ |
715 | static struct cpp_dir * | |
716 | search_path_head (cpp_reader *pfile, const char *fname, int angle_brackets, | |
717 | enum include_type type) | |
718 | { | |
719 | cpp_dir *dir; | |
720 | _cpp_file *file; | |
74eb4b3e | 721 | |
3dce1408 | 722 | if (IS_ABSOLUTE_PATH (fname)) |
8f9b4009 NB |
723 | return &pfile->no_search_path; |
724 | ||
4dc299fb PB |
725 | /* pfile->buffer is NULL when processing an -include command-line flag. */ |
726 | file = pfile->buffer == NULL ? pfile->main_file : pfile->buffer->file; | |
41947a54 NB |
727 | |
728 | /* For #include_next, skip in the search path past the dir in which | |
e7182666 NB |
729 | the current file was found, but if it was found via an absolute |
730 | path use the normal search logic. */ | |
8f9b4009 NB |
731 | if (type == IT_INCLUDE_NEXT && file->dir) |
732 | dir = file->dir->next; | |
74eb4b3e | 733 | else if (angle_brackets) |
8f9b4009 NB |
734 | dir = pfile->bracket_include; |
735 | else if (type == IT_CMDLINE) | |
736 | /* -include and -imacros use the #include "" chain with the | |
737 | preprocessor's cwd prepended. */ | |
738 | return make_cpp_dir (pfile, "./", false); | |
739 | else if (pfile->quote_ignores_source_dir) | |
740 | dir = pfile->quote_include; | |
41947a54 | 741 | else |
12f9df4e PB |
742 | return make_cpp_dir (pfile, dir_name_of_file (file), |
743 | pfile->buffer ? pfile->buffer->sysp : 0); | |
8f9b4009 NB |
744 | |
745 | if (dir == NULL) | |
0527bc4e | 746 | cpp_error (pfile, CPP_DL_ERROR, |
8f9b4009 NB |
747 | "no include path in which to search for %s", fname); |
748 | ||
749 | return dir; | |
750 | } | |
41947a54 | 751 | |
8f9b4009 | 752 | /* Strip the basename from the file's path. It ends with a slash if |
02fa63cd | 753 | of nonzero length. Note that this procedure also works for |
8f9b4009 NB |
754 | <stdin>, which is represented by the empty string. */ |
755 | static const char * | |
756 | dir_name_of_file (_cpp_file *file) | |
757 | { | |
758 | if (!file->dir_name) | |
41947a54 | 759 | { |
8f9b4009 NB |
760 | size_t len = lbasename (file->path) - file->path; |
761 | char *dir_name = xmalloc (len + 1); | |
762 | ||
763 | memcpy (dir_name, file->path, len); | |
764 | dir_name[len] = '\0'; | |
765 | file->dir_name = dir_name; | |
41947a54 NB |
766 | } |
767 | ||
8f9b4009 NB |
768 | return file->dir_name; |
769 | } | |
770 | ||
8f9b4009 NB |
771 | /* Handles #include-family directives (distinguished by TYPE), |
772 | including HEADER, and the command line -imacros and -include. | |
773 | Returns true if a buffer was stacked. */ | |
774 | bool | |
775 | _cpp_stack_include (cpp_reader *pfile, const char *fname, int angle_brackets, | |
776 | enum include_type type) | |
777 | { | |
778 | struct cpp_dir *dir; | |
22234f56 | 779 | _cpp_file *file; |
8f9b4009 NB |
780 | |
781 | dir = search_path_head (pfile, fname, angle_brackets, type); | |
782 | if (!dir) | |
783 | return false; | |
784 | ||
22234f56 PB |
785 | file = _cpp_find_file (pfile, fname, dir, false); |
786 | ||
787 | /* Compensate for the increment in linemap_add. In the case of a | |
788 | normal #include, we're currently at the start of the line | |
789 | *following* the #include. A separate source_location for this | |
790 | location makes no sense (until we do the LC_LEAVE), and | |
791 | complicates LAST_SOURCE_LINE_LOCATION. This does not apply if we | |
792 | found a PCH file (in which case linemap_add is not called) or we | |
793 | were included from the command-line. */ | |
794 | if (! file->pch && file->err_no == 0 && type != IT_CMDLINE) | |
795 | pfile->line_table->highest_location--; | |
796 | ||
797 | return _cpp_stack_file (pfile, file, type == IT_IMPORT); | |
8f9b4009 NB |
798 | } |
799 | ||
800 | /* Could not open FILE. The complication is dependency output. */ | |
801 | static void | |
802 | open_file_failed (cpp_reader *pfile, _cpp_file *file) | |
803 | { | |
500bee0a | 804 | int sysp = pfile->line_table->highest_line > 1 && pfile->buffer ? pfile->buffer->sysp : 0; |
8f9b4009 NB |
805 | bool print_dep = CPP_OPTION (pfile, deps.style) > !!sysp; |
806 | ||
807 | errno = file->err_no; | |
808 | if (print_dep && CPP_OPTION (pfile, deps.missing_files) && errno == ENOENT) | |
bf42e45b | 809 | deps_add_dep (pfile->deps, file->name); |
8f9b4009 | 810 | else |
add7091b | 811 | { |
8f9b4009 NB |
812 | /* If we are outputting dependencies but not for this file then |
813 | don't error because we can still produce correct output. */ | |
814 | if (CPP_OPTION (pfile, deps.style) && ! print_dep) | |
0527bc4e | 815 | cpp_errno (pfile, CPP_DL_WARNING, file->path); |
e7182666 | 816 | else |
0527bc4e | 817 | cpp_errno (pfile, CPP_DL_ERROR, file->path); |
add7091b | 818 | } |
8f9b4009 | 819 | } |
591e15a1 | 820 | |
8f9b4009 NB |
821 | /* Search in the chain beginning at HEAD for a file whose search path |
822 | started at START_DIR != NULL. */ | |
823 | static struct file_hash_entry * | |
824 | search_cache (struct file_hash_entry *head, const cpp_dir *start_dir) | |
825 | { | |
826 | while (head && head->start_dir != start_dir) | |
827 | head = head->next; | |
828 | ||
829 | return head; | |
830 | } | |
831 | ||
832 | /* Allocate a new _cpp_file structure. */ | |
833 | static _cpp_file * | |
834 | make_cpp_file (cpp_reader *pfile, cpp_dir *dir, const char *fname) | |
835 | { | |
836 | _cpp_file *file; | |
837 | ||
838 | file = xcalloc (1, sizeof (_cpp_file)); | |
839 | file->main_file = !pfile->buffer; | |
840 | file->fd = -1; | |
841 | file->dir = dir; | |
842 | file->name = xstrdup (fname); | |
843 | ||
844 | return file; | |
845 | } | |
846 | ||
847 | /* A hash of directory names. The directory names are the path names | |
848 | of files which contain a #include "", the included file name is | |
849 | appended to this directories. | |
850 | ||
851 | To avoid duplicate entries we follow the convention that all | |
852 | non-empty directory names should end in a '/'. DIR_NAME must be | |
853 | stored in permanently allocated memory. */ | |
854 | static cpp_dir * | |
855 | make_cpp_dir (cpp_reader *pfile, const char *dir_name, int sysp) | |
856 | { | |
857 | struct file_hash_entry *entry, **hash_slot; | |
858 | cpp_dir *dir; | |
859 | ||
860 | hash_slot = (struct file_hash_entry **) | |
b92be669 PB |
861 | htab_find_slot_with_hash (pfile->file_hash, dir_name, |
862 | htab_hash_string (dir_name), | |
863 | INSERT); | |
8f9b4009 NB |
864 | |
865 | /* Have we already hashed this directory? */ | |
866 | for (entry = *hash_slot; entry; entry = entry->next) | |
867 | if (entry->start_dir == NULL) | |
868 | return entry->u.dir; | |
869 | ||
870 | dir = xcalloc (1, sizeof (cpp_dir)); | |
871 | dir->next = pfile->quote_include; | |
872 | dir->name = (char *) dir_name; | |
873 | dir->len = strlen (dir_name); | |
874 | dir->sysp = sysp; | |
94d1613b | 875 | dir->construct = 0; |
8f9b4009 NB |
876 | |
877 | /* Store this new result in the hash table. */ | |
878 | entry = new_file_hash_entry (pfile); | |
879 | entry->next = *hash_slot; | |
880 | entry->start_dir = NULL; | |
881 | entry->u.dir = dir; | |
882 | *hash_slot = entry; | |
883 | ||
884 | return dir; | |
885 | } | |
886 | ||
887 | /* Create a new block of memory for file hash entries. */ | |
888 | static void | |
889 | allocate_file_hash_entries (cpp_reader *pfile) | |
890 | { | |
891 | pfile->file_hash_entries_used = 0; | |
892 | pfile->file_hash_entries_allocated = 127; | |
893 | pfile->file_hash_entries = xmalloc | |
894 | (pfile->file_hash_entries_allocated * sizeof (struct file_hash_entry)); | |
895 | } | |
896 | ||
897 | /* Return a new file hash entry. */ | |
898 | static struct file_hash_entry * | |
899 | new_file_hash_entry (cpp_reader *pfile) | |
900 | { | |
901 | if (pfile->file_hash_entries_used == pfile->file_hash_entries_allocated) | |
902 | allocate_file_hash_entries (pfile); | |
903 | ||
904 | return &pfile->file_hash_entries[pfile->file_hash_entries_used++]; | |
905 | } | |
906 | ||
907 | /* Returns TRUE if a file FNAME has ever been successfully opened. | |
908 | This routine is not intended to correctly handle filenames aliased | |
909 | by links or redundant . or .. traversals etc. */ | |
910 | bool | |
911 | cpp_included (cpp_reader *pfile, const char *fname) | |
912 | { | |
913 | struct file_hash_entry *entry; | |
914 | ||
b92be669 PB |
915 | entry = htab_find_with_hash (pfile->file_hash, fname, |
916 | htab_hash_string (fname)); | |
8f9b4009 NB |
917 | |
918 | while (entry && (entry->start_dir == NULL || entry->u.file->err_no)) | |
919 | entry = entry->next; | |
920 | ||
921 | return entry != NULL; | |
922 | } | |
923 | ||
6614fd40 | 924 | /* Calculate the hash value of a file hash entry P. */ |
b92be669 PB |
925 | |
926 | static hashval_t | |
927 | file_hash_hash (const void *p) | |
928 | { | |
929 | struct file_hash_entry *entry = (struct file_hash_entry *) p; | |
930 | const char *hname; | |
931 | if (entry->start_dir) | |
932 | hname = entry->u.file->name; | |
933 | else | |
934 | hname = entry->u.dir->name; | |
935 | ||
936 | return htab_hash_string (hname); | |
937 | } | |
938 | ||
8f9b4009 NB |
939 | /* Compare a string Q against a file hash entry P. */ |
940 | static int | |
b92be669 | 941 | file_hash_eq (const void *p, const void *q) |
8f9b4009 NB |
942 | { |
943 | struct file_hash_entry *entry = (struct file_hash_entry *) p; | |
944 | const char *fname = (const char *) q; | |
945 | const char *hname; | |
946 | ||
947 | if (entry->start_dir) | |
948 | hname = entry->u.file->name; | |
949 | else | |
950 | hname = entry->u.dir->name; | |
951 | ||
952 | return strcmp (hname, fname) == 0; | |
953 | } | |
954 | ||
955 | /* Initialize everything in this source file. */ | |
956 | void | |
957 | _cpp_init_files (cpp_reader *pfile) | |
958 | { | |
b92be669 | 959 | pfile->file_hash = htab_create_alloc (127, file_hash_hash, file_hash_eq, |
8f9b4009 NB |
960 | NULL, xcalloc, free); |
961 | allocate_file_hash_entries (pfile); | |
962 | } | |
963 | ||
964 | /* Finalize everything in this source file. */ | |
965 | void | |
966 | _cpp_cleanup_files (cpp_reader *pfile) | |
967 | { | |
968 | htab_delete (pfile->file_hash); | |
969 | } | |
970 | ||
971 | /* Enter a file name in the hash for the sake of cpp_included. */ | |
972 | void | |
973 | _cpp_fake_include (cpp_reader *pfile, const char *fname) | |
974 | { | |
4dc299fb | 975 | _cpp_find_file (pfile, fname, pfile->buffer->file->dir, true); |
add7091b ZW |
976 | } |
977 | ||
e605b040 | 978 | /* Not everyone who wants to set system-header-ness on a buffer can |
642ce434 NB |
979 | see the details of a buffer. This is an exported interface because |
980 | fix-header needs it. */ | |
e605b040 | 981 | void |
6cf87ca4 | 982 | cpp_make_system_header (cpp_reader *pfile, int syshdr, int externc) |
e605b040 | 983 | { |
614c7d37 | 984 | int flags = 0; |
500bee0a PB |
985 | const struct line_maps *line_table = pfile->line_table; |
986 | const struct line_map *map = &line_table->maps[line_table->used-1]; | |
614c7d37 NB |
987 | |
988 | /* 1 = system header, 2 = system header to be treated as C. */ | |
989 | if (syshdr) | |
990 | flags = 1 + (externc != 0); | |
12f9df4e PB |
991 | pfile->buffer->sysp = flags; |
992 | _cpp_do_file_change (pfile, LC_RENAME, map->to_file, | |
500bee0a | 993 | SOURCE_LINE (map, pfile->line_table->highest_line), flags); |
e605b040 ZW |
994 | } |
995 | ||
b4e46cea PB |
996 | /* Allow the client to change the current file. Used by the front end |
997 | to achieve pseudo-file names like <built-in>. | |
998 | If REASON is LC_LEAVE, then NEW_NAME must be NULL. */ | |
c19b12cb | 999 | void |
6cf87ca4 ZW |
1000 | cpp_change_file (cpp_reader *pfile, enum lc_reason reason, |
1001 | const char *new_name) | |
c19b12cb | 1002 | { |
b4e46cea | 1003 | _cpp_do_file_change (pfile, reason, new_name, 1, 0); |
c19b12cb NB |
1004 | } |
1005 | ||
8f9b4009 | 1006 | /* Callback function for htab_traverse. */ |
c71f835b | 1007 | static int |
8f9b4009 | 1008 | report_missing_guard (void **slot, void *b) |
c71f835b | 1009 | { |
8f9b4009 | 1010 | struct file_hash_entry *entry = (struct file_hash_entry *) *slot; |
dc65cd60 | 1011 | int *bannerp = (int *) b; |
c71f835b | 1012 | |
8f9b4009 NB |
1013 | /* Skip directories. */ |
1014 | if (entry->start_dir != NULL) | |
c71f835b | 1015 | { |
8f9b4009 NB |
1016 | _cpp_file *file = entry->u.file; |
1017 | ||
1018 | /* We don't want MI guard advice for the main file. */ | |
1019 | if (file->cmacro == NULL && file->stack_count == 1 && !file->main_file) | |
c71f835b | 1020 | { |
8f9b4009 NB |
1021 | if (*bannerp == 0) |
1022 | { | |
1023 | fputs (_("Multiple include guards may be useful for:\n"), | |
1024 | stderr); | |
1025 | *bannerp = 1; | |
1026 | } | |
1027 | ||
1028 | fputs (entry->u.file->path, stderr); | |
1029 | putc ('\n', stderr); | |
c71f835b | 1030 | } |
c71f835b | 1031 | } |
c71f835b | 1032 | |
8f9b4009 | 1033 | return 0; |
a36c54fa NB |
1034 | } |
1035 | ||
8f9b4009 NB |
1036 | /* Report on all files that might benefit from a multiple include guard. |
1037 | Triggered by -H. */ | |
1038 | void | |
1039 | _cpp_report_missing_guards (cpp_reader *pfile) | |
168d3732 | 1040 | { |
8f9b4009 | 1041 | int banner = 0; |
ba133c96 | 1042 | |
8f9b4009 | 1043 | htab_traverse (pfile->file_hash, report_missing_guard, &banner); |
168d3732 ZW |
1044 | } |
1045 | ||
41947a54 | 1046 | /* Locate HEADER, and determine whether it is newer than the current |
48c4721e | 1047 | file. If it cannot be located or dated, return -1, if it is |
41947a54 | 1048 | newer, return 1, otherwise 0. */ |
f3f751ad | 1049 | int |
6cf87ca4 ZW |
1050 | _cpp_compare_file_date (cpp_reader *pfile, const char *fname, |
1051 | int angle_brackets) | |
f3f751ad | 1052 | { |
8f9b4009 NB |
1053 | _cpp_file *file; |
1054 | struct cpp_dir *dir; | |
df383483 | 1055 | |
8f9b4009 NB |
1056 | dir = search_path_head (pfile, fname, angle_brackets, IT_INCLUDE); |
1057 | if (!dir) | |
f3f751ad | 1058 | return -1; |
41947a54 | 1059 | |
4dc299fb | 1060 | file = _cpp_find_file (pfile, fname, dir, false); |
8f9b4009 NB |
1061 | if (file->err_no) |
1062 | return -1; | |
c45da1ca | 1063 | |
8f9b4009 | 1064 | if (file->fd != -1) |
c0bfe993 | 1065 | { |
8f9b4009 NB |
1066 | close (file->fd); |
1067 | file->fd = -1; | |
c0bfe993 | 1068 | } |
041c3194 | 1069 | |
8f9b4009 | 1070 | return file->st.st_mtime > pfile->buffer->file->st.st_mtime; |
f8f769ea ZW |
1071 | } |
1072 | ||
c19b12cb NB |
1073 | /* Pushes the given file onto the buffer stack. Returns nonzero if |
1074 | successful. */ | |
1075 | bool | |
8f9b4009 | 1076 | cpp_push_include (cpp_reader *pfile, const char *fname) |
c19b12cb | 1077 | { |
8f9b4009 | 1078 | return _cpp_stack_include (pfile, fname, false, IT_CMDLINE); |
c19b12cb NB |
1079 | } |
1080 | ||
5d8ebbd8 | 1081 | /* Do appropriate cleanup when a file INC's buffer is popped off the |
af0d16cd NB |
1082 | input stack. */ |
1083 | void | |
8f9b4009 | 1084 | _cpp_pop_file_buffer (cpp_reader *pfile, _cpp_file *file) |
f9a0e96c | 1085 | { |
ba133c96 | 1086 | /* Record the inclusion-preventing macro, which could be NULL |
6d18adbc | 1087 | meaning no controlling macro. */ |
8f9b4009 NB |
1088 | if (pfile->mi_valid && file->cmacro == NULL) |
1089 | file->cmacro = pfile->mi_cmacro; | |
93c80368 NB |
1090 | |
1091 | /* Invalidate control macros in the #including file. */ | |
6d18adbc | 1092 | pfile->mi_valid = false; |
f9a0e96c | 1093 | |
8f9b4009 NB |
1094 | if (file->buffer) |
1095 | { | |
1096 | free ((void *) file->buffer); | |
1097 | file->buffer = NULL; | |
1098 | } | |
f9a0e96c ZW |
1099 | } |
1100 | ||
8f9b4009 NB |
1101 | /* Set the include chain for "" to QUOTE, for <> to BRACKET. If |
1102 | QUOTE_IGNORES_SOURCE_DIR, then "" includes do not look in the | |
1103 | directory of the including file. | |
ba133c96 | 1104 | |
8f9b4009 NB |
1105 | If BRACKET does not lie in the QUOTE chain, it is set to QUOTE. */ |
1106 | void | |
1107 | cpp_set_include_chains (cpp_reader *pfile, cpp_dir *quote, cpp_dir *bracket, | |
1108 | int quote_ignores_source_dir) | |
591e15a1 | 1109 | { |
8f9b4009 NB |
1110 | pfile->quote_include = quote; |
1111 | pfile->bracket_include = quote; | |
1112 | pfile->quote_ignores_source_dir = quote_ignores_source_dir; | |
591e15a1 | 1113 | |
8f9b4009 | 1114 | for (; quote; quote = quote->next) |
591e15a1 | 1115 | { |
8f9b4009 NB |
1116 | quote->name_map = NULL; |
1117 | quote->len = strlen (quote->name); | |
1118 | if (quote == bracket) | |
1119 | pfile->bracket_include = bracket; | |
ba133c96 | 1120 | } |
591e15a1 NB |
1121 | } |
1122 | ||
8f9b4009 NB |
1123 | /* Append the file name to the directory to create the path, but don't |
1124 | turn / into // or // into ///; // may be a namespace escape. */ | |
1125 | static char * | |
1126 | append_file_to_dir (const char *fname, cpp_dir *dir) | |
1127 | { | |
1128 | size_t dlen, flen; | |
1129 | char *path; | |
1130 | ||
1131 | dlen = dir->len; | |
1132 | flen = strlen (fname); | |
1133 | path = xmalloc (dlen + 1 + flen + 1); | |
1134 | memcpy (path, dir->name, dlen); | |
1135 | if (dlen && path[dlen - 1] != '/') | |
1136 | path[dlen++] = '/'; | |
1137 | memcpy (&path[dlen], fname, flen + 1); | |
1138 | ||
1139 | return path; | |
1140 | } | |
c31a6508 ZW |
1141 | |
1142 | /* Read a space delimited string of unlimited length from a stdio | |
5d8ebbd8 | 1143 | file F. */ |
c31a6508 | 1144 | static char * |
6cf87ca4 | 1145 | read_filename_string (int ch, FILE *f) |
c31a6508 ZW |
1146 | { |
1147 | char *alloc, *set; | |
1148 | int len; | |
1149 | ||
1150 | len = 20; | |
1151 | set = alloc = xmalloc (len + 1); | |
dc65cd60 | 1152 | if (! is_space (ch)) |
c31a6508 ZW |
1153 | { |
1154 | *set++ = ch; | |
dc65cd60 | 1155 | while ((ch = getc (f)) != EOF && ! is_space (ch)) |
c31a6508 ZW |
1156 | { |
1157 | if (set - alloc == len) | |
1158 | { | |
1159 | len *= 2; | |
1160 | alloc = xrealloc (alloc, len + 1); | |
1161 | set = alloc + len / 2; | |
1162 | } | |
1163 | *set++ = ch; | |
1164 | } | |
1165 | } | |
1166 | *set = '\0'; | |
1167 | ungetc (ch, f); | |
1168 | return alloc; | |
1169 | } | |
1170 | ||
8f9b4009 NB |
1171 | /* Read the file name map file for DIR. */ |
1172 | static void | |
1173 | read_name_map (cpp_dir *dir) | |
c31a6508 | 1174 | { |
8f9b4009 | 1175 | static const char FILE_NAME_MAP_FILE[] = "header.gcc"; |
c31a6508 ZW |
1176 | char *name; |
1177 | FILE *f; | |
8f9b4009 NB |
1178 | size_t len, count = 0, room = 9; |
1179 | ||
1180 | len = dir->len; | |
1181 | name = alloca (len + sizeof (FILE_NAME_MAP_FILE) + 1); | |
1182 | memcpy (name, dir->name, len); | |
1183 | if (len && name[len - 1] != '/') | |
1184 | name[len++] = '/'; | |
1185 | strcpy (name + len, FILE_NAME_MAP_FILE); | |
c31a6508 | 1186 | f = fopen (name, "r"); |
8767c894 | 1187 | |
8f9b4009 NB |
1188 | dir->name_map = xmalloc (room * sizeof (char *)); |
1189 | ||
8767c894 NB |
1190 | /* Silently return NULL if we cannot open. */ |
1191 | if (f) | |
c31a6508 ZW |
1192 | { |
1193 | int ch; | |
c31a6508 ZW |
1194 | |
1195 | while ((ch = getc (f)) != EOF) | |
1196 | { | |
8f9b4009 | 1197 | char *to; |
c31a6508 | 1198 | |
dc65cd60 | 1199 | if (is_space (ch)) |
c31a6508 | 1200 | continue; |
8f9b4009 NB |
1201 | |
1202 | if (count + 2 > room) | |
1203 | { | |
1204 | room += 8; | |
1205 | dir->name_map = xrealloc (dir->name_map, room * sizeof (char *)); | |
1206 | } | |
1207 | ||
1208 | dir->name_map[count] = read_filename_string (ch, f); | |
dc65cd60 | 1209 | while ((ch = getc (f)) != EOF && is_hspace (ch)) |
c31a6508 | 1210 | ; |
c31a6508 | 1211 | |
8f9b4009 | 1212 | to = read_filename_string (ch, f); |
3dce1408 | 1213 | if (IS_ABSOLUTE_PATH (to)) |
8f9b4009 | 1214 | dir->name_map[count + 1] = to; |
c31a6508 ZW |
1215 | else |
1216 | { | |
8f9b4009 | 1217 | dir->name_map[count + 1] = append_file_to_dir (to, dir); |
c31a6508 | 1218 | free (to); |
df383483 | 1219 | } |
c31a6508 | 1220 | |
8f9b4009 | 1221 | count += 2; |
c31a6508 ZW |
1222 | while ((ch = getc (f)) != '\n') |
1223 | if (ch == EOF) | |
1224 | break; | |
1225 | } | |
8f9b4009 | 1226 | |
c31a6508 ZW |
1227 | fclose (f); |
1228 | } | |
df383483 | 1229 | |
8f9b4009 NB |
1230 | /* Terminate the list of maps. */ |
1231 | dir->name_map[count] = NULL; | |
df383483 | 1232 | } |
c31a6508 | 1233 | |
8f9b4009 NB |
1234 | /* Remap a FILE's name based on the file_name_map, if any, for |
1235 | FILE->dir. If the file name has any directory separators, | |
1236 | recursively check those directories too. */ | |
c31a6508 | 1237 | static char * |
8f9b4009 | 1238 | remap_filename (cpp_reader *pfile, _cpp_file *file) |
c31a6508 | 1239 | { |
8f9b4009 NB |
1240 | const char *fname, *p; |
1241 | char *new_dir; | |
1242 | cpp_dir *dir; | |
1243 | size_t index, len; | |
8767c894 | 1244 | |
8f9b4009 NB |
1245 | dir = file->dir; |
1246 | fname = file->name; | |
df383483 | 1247 | |
8f9b4009 NB |
1248 | for (;;) |
1249 | { | |
1250 | if (!dir->name_map) | |
1251 | read_name_map (dir); | |
c31a6508 | 1252 | |
8f9b4009 NB |
1253 | for (index = 0; dir->name_map[index]; index += 2) |
1254 | if (!strcmp (dir->name_map[index], fname)) | |
1255 | return xstrdup (dir->name_map[index + 1]); | |
c31a6508 | 1256 | |
8f9b4009 NB |
1257 | p = strchr (fname, '/'); |
1258 | if (!p || p == fname) | |
1259 | return NULL; | |
f9200da2 | 1260 | |
8f9b4009 NB |
1261 | len = dir->len + (p - fname + 1); |
1262 | new_dir = xmalloc (len + 1); | |
1263 | memcpy (new_dir, dir->name, dir->len); | |
1264 | memcpy (new_dir + dir->len, fname, p - fname + 1); | |
1265 | new_dir[len] = '\0'; | |
df383483 | 1266 | |
8f9b4009 NB |
1267 | dir = make_cpp_dir (pfile, new_dir, dir->sysp); |
1268 | fname = p + 1; | |
0b3d776a | 1269 | } |
0b3d776a | 1270 | } |
986b1f13 | 1271 | |
8f9b4009 NB |
1272 | /* Returns true if PCHNAME is a valid PCH file for FILE. */ |
1273 | static bool | |
1274 | validate_pch (cpp_reader *pfile, _cpp_file *file, const char *pchname) | |
986b1f13 | 1275 | { |
8f9b4009 | 1276 | const char *saved_path = file->path; |
230fcd32 | 1277 | bool valid = false; |
986b1f13 | 1278 | |
8f9b4009 NB |
1279 | file->path = pchname; |
1280 | if (open_file (file)) | |
986b1f13 | 1281 | { |
230fcd32 | 1282 | valid = 1 & pfile->cb.valid_pch (pfile, pchname, file->fd); |
8f9b4009 | 1283 | |
230fcd32 | 1284 | if (!valid) |
986b1f13 | 1285 | { |
8f9b4009 NB |
1286 | close (file->fd); |
1287 | file->fd = -1; | |
986b1f13 | 1288 | } |
986b1f13 | 1289 | |
8f9b4009 | 1290 | if (CPP_OPTION (pfile, print_include_names)) |
986b1f13 | 1291 | { |
8f9b4009 | 1292 | unsigned int i; |
54020b29 | 1293 | for (i = 1; i < pfile->line_table->depth; i++) |
8f9b4009 NB |
1294 | putc ('.', stderr); |
1295 | fprintf (stderr, "%c %s\n", | |
230fcd32 | 1296 | valid ? '!' : 'x', pchname); |
986b1f13 | 1297 | } |
986b1f13 NB |
1298 | } |
1299 | ||
8f9b4009 | 1300 | file->path = saved_path; |
230fcd32 | 1301 | return valid; |
986b1f13 | 1302 | } |
94d1613b MS |
1303 | |
1304 | /* Get the path associated with the _cpp_file F. The path includes | |
1305 | the base name from the include directive and the directory it was | |
1306 | found in via the search path. */ | |
1307 | ||
1308 | const char * | |
1309 | cpp_get_path (struct _cpp_file *f) | |
1310 | { | |
1311 | return f->path; | |
1312 | } | |
1313 | ||
e3c287c9 MS |
1314 | /* Get the directory associated with the _cpp_file F. */ |
1315 | ||
1316 | cpp_dir * | |
1317 | cpp_get_dir (struct _cpp_file *f) | |
1318 | { | |
1319 | return f->dir; | |
1320 | } | |
1321 | ||
94d1613b MS |
1322 | /* Get the cpp_buffer currently associated with the cpp_reader |
1323 | PFILE. */ | |
1324 | ||
1325 | cpp_buffer * | |
1326 | cpp_get_buffer (cpp_reader *pfile) | |
1327 | { | |
1328 | return pfile->buffer; | |
1329 | } | |
1330 | ||
1331 | /* Get the _cpp_file associated with the cpp_buffer B. */ | |
1332 | ||
1333 | _cpp_file * | |
1334 | cpp_get_file (cpp_buffer *b) | |
1335 | { | |
1336 | return b->file; | |
1337 | } | |
1338 | ||
1339 | /* Get the previous cpp_buffer given a cpp_buffer B. The previous | |
1340 | buffer is the buffer that included the given buffer. */ | |
1341 | ||
1342 | cpp_buffer * | |
1343 | cpp_get_prev (cpp_buffer *b) | |
1344 | { | |
1345 | return b->prev; | |
1346 | } | |
73e61092 | 1347 | \f |
1ae58c30 | 1348 | /* This data structure holds the list of header files that were seen |
73e61092 GK |
1349 | while the PCH was being built. The 'entries' field is kept sorted |
1350 | in memcmp() order; yes, this means that on little-endian systems, | |
1351 | it's sorted initially by the least-significant byte of 'size', but | |
1352 | that's OK. The code does rely on having entries with the same size | |
1353 | next to each other. */ | |
1354 | ||
1355 | struct pchf_data { | |
1356 | /* Number of pchf_entry structures. */ | |
1357 | size_t count; | |
1358 | ||
1359 | /* Are there any values with once_only set? | |
1360 | This is used as an optimisation, it means we don't have to search | |
1361 | the structure if we're processing a regular #include. */ | |
1362 | bool have_once_only; | |
16dd5cfe | 1363 | |
73e61092 GK |
1364 | struct pchf_entry { |
1365 | /* The size of this file. This is used to save running a MD5 checksum | |
1366 | if the sizes don't match. */ | |
1367 | off_t size; | |
1368 | /* The MD5 checksum of this file. */ | |
1369 | unsigned char sum[16]; | |
1370 | /* Is this file to be included only once? */ | |
1371 | bool once_only; | |
1372 | } entries[1]; | |
1373 | }; | |
1374 | ||
1375 | static struct pchf_data *pchf; | |
1376 | ||
1377 | /* Data for pchf_addr. */ | |
16dd5cfe | 1378 | struct pchf_adder_info |
73e61092 GK |
1379 | { |
1380 | cpp_reader *pfile; | |
1381 | struct pchf_data *d; | |
1382 | }; | |
1383 | ||
1384 | /* A hash traversal function to add entries into DATA->D. */ | |
1385 | ||
1386 | static int | |
1387 | pchf_adder (void **slot, void *data) | |
1388 | { | |
1389 | struct file_hash_entry *h = (struct file_hash_entry *) *slot; | |
1390 | struct pchf_adder_info *i = (struct pchf_adder_info *) data; | |
1391 | ||
1392 | if (h->start_dir != NULL && h->u.file->stack_count != 0) | |
1393 | { | |
1394 | struct pchf_data *d = i->d; | |
1395 | _cpp_file *f = h->u.file; | |
1396 | size_t count = d->count++; | |
1397 | ||
1398 | /* This should probably never happen, since if a read error occurred | |
1399 | the PCH file shouldn't be written... */ | |
1400 | if (f->dont_read || f->err_no) | |
1401 | return 1; | |
16dd5cfe | 1402 | |
73e61092 | 1403 | d->entries[count].once_only = f->once_only; |
97d62313 JB |
1404 | /* |= is avoided in the next line because of an HP C compiler bug */ |
1405 | d->have_once_only = d->have_once_only | f->once_only; | |
73e61092 | 1406 | if (f->buffer_valid) |
16dd5cfe | 1407 | md5_buffer ((const char *)f->buffer, |
73e61092 GK |
1408 | f->st.st_size, d->entries[count].sum); |
1409 | else | |
1410 | { | |
1411 | FILE *ff; | |
1412 | int oldfd = f->fd; | |
1413 | ||
1414 | if (!open_file (f)) | |
1415 | { | |
1416 | open_file_failed (i->pfile, f); | |
1417 | return 0; | |
1418 | } | |
1419 | ff = fdopen (f->fd, "rb"); | |
1420 | md5_stream (ff, d->entries[count].sum); | |
1421 | fclose (ff); | |
1422 | f->fd = oldfd; | |
1423 | } | |
1424 | d->entries[count].size = f->st.st_size; | |
1425 | } | |
1426 | return 1; | |
1427 | } | |
1428 | ||
1429 | /* A qsort ordering function for pchf_entry structures. */ | |
1430 | ||
1431 | static int | |
1432 | pchf_save_compare (const void *e1, const void *e2) | |
1433 | { | |
1434 | return memcmp (e1, e2, sizeof (struct pchf_entry)); | |
1435 | } | |
1436 | ||
1437 | /* Create and write to F a pchf_data structure. */ | |
1438 | ||
1439 | bool | |
1440 | _cpp_save_file_entries (cpp_reader *pfile, FILE *f) | |
1441 | { | |
1442 | size_t count = 0; | |
1443 | struct pchf_data *result; | |
1444 | size_t result_size; | |
1445 | struct pchf_adder_info pai; | |
16dd5cfe | 1446 | |
73e61092 | 1447 | count = htab_elements (pfile->file_hash); |
16dd5cfe | 1448 | result_size = (sizeof (struct pchf_data) |
73e61092 GK |
1449 | + sizeof (struct pchf_entry) * (count - 1)); |
1450 | result = xcalloc (result_size, 1); | |
16dd5cfe | 1451 | |
73e61092 GK |
1452 | result->count = 0; |
1453 | result->have_once_only = false; | |
16dd5cfe | 1454 | |
73e61092 GK |
1455 | pai.pfile = pfile; |
1456 | pai.d = result; | |
1457 | htab_traverse (pfile->file_hash, pchf_adder, &pai); | |
1458 | ||
1459 | result_size = (sizeof (struct pchf_data) | |
1460 | + sizeof (struct pchf_entry) * (result->count - 1)); | |
16dd5cfe | 1461 | |
73e61092 GK |
1462 | qsort (result->entries, result->count, sizeof (struct pchf_entry), |
1463 | pchf_save_compare); | |
1464 | ||
1465 | return fwrite (result, result_size, 1, f) == 1; | |
1466 | } | |
1467 | ||
1468 | /* Read the pchf_data structure from F. */ | |
1469 | ||
1470 | bool | |
1471 | _cpp_read_file_entries (cpp_reader *pfile ATTRIBUTE_UNUSED, FILE *f) | |
1472 | { | |
1473 | struct pchf_data d; | |
16dd5cfe | 1474 | |
73e61092 GK |
1475 | if (fread (&d, sizeof (struct pchf_data) - sizeof (struct pchf_entry), 1, f) |
1476 | != 1) | |
1477 | return false; | |
16dd5cfe | 1478 | |
73e61092 GK |
1479 | pchf = xmalloc (sizeof (struct pchf_data) |
1480 | + sizeof (struct pchf_entry) * (d.count - 1)); | |
1481 | memcpy (pchf, &d, sizeof (struct pchf_data) - sizeof (struct pchf_entry)); | |
1482 | if (fread (pchf->entries, sizeof (struct pchf_entry), d.count, f) | |
1483 | != d.count) | |
1484 | return false; | |
1485 | return true; | |
1486 | } | |
1487 | ||
1488 | /* The parameters for pchf_compare. */ | |
1489 | ||
1490 | struct pchf_compare_data | |
1491 | { | |
1492 | /* The size of the file we're looking for. */ | |
1493 | off_t size; | |
1494 | ||
1495 | /* The MD5 checksum of the file, if it's been computed. */ | |
1496 | unsigned char sum[16]; | |
1497 | ||
1498 | /* Is SUM valid? */ | |
1499 | bool sum_computed; | |
1500 | ||
1501 | /* Do we need to worry about entries that don't have ONCE_ONLY set? */ | |
1502 | bool check_included; | |
16dd5cfe | 1503 | |
73e61092 GK |
1504 | /* The file that we're searching for. */ |
1505 | _cpp_file *f; | |
1506 | }; | |
1507 | ||
1508 | /* bsearch comparison function; look for D_P in E_P. */ | |
1509 | ||
1510 | static int | |
1511 | pchf_compare (const void *d_p, const void *e_p) | |
1512 | { | |
1513 | const struct pchf_entry *e = (const struct pchf_entry *)e_p; | |
1514 | struct pchf_compare_data *d = (struct pchf_compare_data *)d_p; | |
1515 | int result; | |
16dd5cfe | 1516 | |
73e61092 GK |
1517 | result = memcmp (&d->size, &e->size, sizeof (off_t)); |
1518 | if (result != 0) | |
1519 | return result; | |
16dd5cfe | 1520 | |
73e61092 GK |
1521 | if (! d->sum_computed) |
1522 | { | |
1523 | _cpp_file *const f = d->f; | |
16dd5cfe | 1524 | |
73e61092 GK |
1525 | md5_buffer ((const char *)f->buffer, f->st.st_size, d->sum); |
1526 | d->sum_computed = true; | |
1527 | } | |
1528 | ||
1529 | result = memcmp (d->sum, e->sum, 16); | |
1530 | if (result != 0) | |
1531 | return result; | |
1532 | ||
1533 | if (d->check_included || e->once_only) | |
1534 | return 0; | |
1535 | else | |
1536 | return 1; | |
1537 | } | |
1538 | ||
16dd5cfe | 1539 | /* Check that F is not in a list read from a PCH file (if any). |
73e61092 GK |
1540 | Assumes that f->buffer_valid is true. Return TRUE if the file |
1541 | should not be read. */ | |
1542 | ||
1543 | static bool | |
1544 | check_file_against_entries (cpp_reader *pfile ATTRIBUTE_UNUSED, | |
1545 | _cpp_file *f, | |
1546 | bool check_included) | |
1547 | { | |
1548 | struct pchf_compare_data d; | |
16dd5cfe | 1549 | |
73e61092 GK |
1550 | if (pchf == NULL |
1551 | || (! check_included && ! pchf->have_once_only)) | |
1552 | return false; | |
1553 | ||
1554 | d.size = f->st.st_size; | |
1555 | d.sum_computed = false; | |
1556 | d.f = f; | |
1557 | d.check_included = check_included; | |
1558 | return bsearch (&d, pchf->entries, pchf->count, sizeof (struct pchf_entry), | |
1559 | pchf_compare) != NULL; | |
1560 | } |