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add7091b | 1 | /* Part of CPP library. (include file handling) |
5e7b4e25 JL |
2 | Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, |
3 | 1999, 2000 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 | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
e38992e8 | 21 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
add7091b ZW |
22 | |
23 | #include "config.h" | |
24 | #include "system.h" | |
e38992e8 | 25 | #include "hashtab.h" |
add7091b | 26 | #include "cpplib.h" |
88ae23e7 | 27 | #include "cpphash.h" |
c1212d2f | 28 | #include "intl.h" |
168d3732 | 29 | #include "mkdeps.h" |
add7091b | 30 | |
f8f769ea ZW |
31 | #ifdef HAVE_MMAP_FILE |
32 | # include <sys/mman.h> | |
33 | # ifndef MMAP_THRESHOLD | |
34 | # define MMAP_THRESHOLD 3 /* Minimum page count to mmap the file. */ | |
35 | # endif | |
36 | ||
37 | #else /* No MMAP_FILE */ | |
38 | # undef MMAP_THRESHOLD | |
39 | # define MMAP_THRESHOLD 0 | |
40 | #endif | |
41 | ||
38b24ee2 ZW |
42 | static IHASH *redundant_include_p PARAMS ((cpp_reader *, IHASH *, |
43 | struct file_name_list *)); | |
f2d5f0cc ZW |
44 | static IHASH *make_IHASH PARAMS ((const char *, const char *, |
45 | struct file_name_list *, | |
46 | unsigned int, IHASH **)); | |
a73ac7a5 | 47 | static struct file_name_map *read_name_map |
38b24ee2 ZW |
48 | PARAMS ((cpp_reader *, const char *)); |
49 | static char *read_filename_string PARAMS ((int, FILE *)); | |
50 | static char *remap_filename PARAMS ((cpp_reader *, char *, | |
51 | struct file_name_list *)); | |
a73ac7a5 | 52 | static struct file_name_list *actual_directory |
38b24ee2 | 53 | PARAMS ((cpp_reader *, const char *)); |
d35364d1 ZW |
54 | static unsigned int hash_IHASH PARAMS ((const void *)); |
55 | static int eq_IHASH PARAMS ((const void *, const void *)); | |
168d3732 ZW |
56 | static int find_include_file PARAMS ((cpp_reader *, const char *, |
57 | struct file_name_list *, | |
58 | IHASH **, int *)); | |
e576beb0 | 59 | static inline int open_include_file PARAMS ((cpp_reader *, const char *)); |
f8f769ea ZW |
60 | static int read_include_file PARAMS ((cpp_reader *, int, IHASH *)); |
61 | static ssize_t read_with_read PARAMS ((cpp_buffer *, int, ssize_t)); | |
62 | static ssize_t read_file PARAMS ((cpp_buffer *, int, ssize_t)); | |
2c826217 | 63 | |
0b3d776a | 64 | #if 0 |
f84c2018 | 65 | static void hack_vms_include_specification PARAMS ((char *)); |
0b3d776a | 66 | #endif |
add7091b | 67 | |
d35364d1 ZW |
68 | /* Initial size of include hash table. */ |
69 | #define IHASHSIZE 50 | |
70 | ||
bb52fa7f ZW |
71 | #ifndef INCLUDE_LEN_FUDGE |
72 | #define INCLUDE_LEN_FUDGE 0 | |
73 | #endif | |
74 | ||
d35364d1 ZW |
75 | /* Calculate hash of an IHASH entry. */ |
76 | static unsigned int | |
77 | hash_IHASH (x) | |
78 | const void *x; | |
add7091b | 79 | { |
29a72a4f ZW |
80 | const IHASH *i = (const IHASH *)x; |
81 | return i->hash; | |
d35364d1 | 82 | } |
add7091b | 83 | |
d35364d1 ZW |
84 | /* Compare an existing IHASH structure with a potential one. */ |
85 | static int | |
86 | eq_IHASH (x, y) | |
87 | const void *x; | |
88 | const void *y; | |
89 | { | |
12cf91fe ZW |
90 | const char *a = ((const IHASH *)x)->nshort; |
91 | const char *b = ((const IHASH *)y)->nshort; | |
d35364d1 ZW |
92 | return !strcmp (a, b); |
93 | } | |
add7091b | 94 | |
d35364d1 ZW |
95 | /* Init the hash table. In here so it can see the hash and eq functions. */ |
96 | void | |
97 | _cpp_init_include_hash (pfile) | |
98 | cpp_reader *pfile; | |
99 | { | |
100 | pfile->all_include_files | |
101 | = htab_create (IHASHSIZE, hash_IHASH, eq_IHASH, free); | |
0b3d776a | 102 | } |
add7091b | 103 | |
0b3d776a ZW |
104 | /* Return 0 if the file pointed to by IHASH has never been included before, |
105 | -1 if it has been included before and need not be again, | |
106 | or a pointer to an IHASH entry which is the file to be reread. | |
107 | "Never before" is with respect to the position in ILIST. | |
add7091b | 108 | |
0b3d776a ZW |
109 | This will not detect redundancies involving odd uses of the |
110 | `current directory' rule for "" includes. They aren't quite | |
111 | pathological, but I think they are rare enough not to worry about. | |
112 | The simplest example is: | |
add7091b | 113 | |
0b3d776a ZW |
114 | top.c: |
115 | #include "a/a.h" | |
116 | #include "b/b.h" | |
add7091b | 117 | |
0b3d776a ZW |
118 | a/a.h: |
119 | #include "../b/b.h" | |
add7091b | 120 | |
0b3d776a ZW |
121 | and the problem is that for `current directory' includes, |
122 | ihash->foundhere is not on any of the global include chains, | |
123 | so the test below (i->foundhere == l) may be false even when | |
124 | the directories are in fact the same. */ | |
125 | ||
38b24ee2 | 126 | static IHASH * |
0b3d776a | 127 | redundant_include_p (pfile, ihash, ilist) |
add7091b | 128 | cpp_reader *pfile; |
38b24ee2 | 129 | IHASH *ihash; |
0b3d776a | 130 | struct file_name_list *ilist; |
add7091b | 131 | { |
0b3d776a | 132 | struct file_name_list *l; |
38b24ee2 | 133 | IHASH *i; |
add7091b | 134 | |
0b3d776a ZW |
135 | if (! ihash->foundhere) |
136 | return 0; | |
add7091b | 137 | |
0b3d776a ZW |
138 | for (i = ihash; i; i = i->next_this_file) |
139 | for (l = ilist; l; l = l->next) | |
140 | if (i->foundhere == l) | |
141 | /* The control_macro works like this: If it's NULL, the file | |
142 | is to be included again. If it's "", the file is never to | |
143 | be included again. If it's a string, the file is not to be | |
144 | included again if the string is the name of a defined macro. */ | |
145 | return (i->control_macro | |
146 | && (i->control_macro[0] == '\0' | |
638d694d | 147 | || cpp_defined (pfile, i->control_macro, |
12cf91fe | 148 | ustrlen (i->control_macro)))) |
38b24ee2 | 149 | ? (IHASH *)-1 : i; |
add7091b | 150 | |
0b3d776a | 151 | return 0; |
add7091b ZW |
152 | } |
153 | ||
b0699dad ZW |
154 | /* Return 1 if the file named by FNAME has been included before in |
155 | any context, 0 otherwise. */ | |
156 | int | |
157 | cpp_included (pfile, fname) | |
158 | cpp_reader *pfile; | |
159 | const char *fname; | |
160 | { | |
d35364d1 ZW |
161 | IHASH dummy, *ptr; |
162 | dummy.nshort = fname; | |
12cf91fe | 163 | dummy.hash = _cpp_calc_hash ((const U_CHAR *)fname, strlen (fname)); |
29a72a4f ZW |
164 | ptr = htab_find_with_hash (pfile->all_include_files, |
165 | (const void *)&dummy, dummy.hash); | |
b0699dad ZW |
166 | return (ptr != NULL); |
167 | } | |
168 | ||
f2d5f0cc ZW |
169 | /* Create an IHASH entry and insert it in SLOT. */ |
170 | static IHASH * | |
171 | make_IHASH (name, fname, path, hash, slot) | |
172 | const char *name, *fname; | |
173 | struct file_name_list *path; | |
174 | unsigned int hash; | |
175 | IHASH **slot; | |
176 | { | |
177 | IHASH *ih; | |
178 | if (path == ABSOLUTE_PATH) | |
179 | { | |
180 | ih = (IHASH *) xmalloc (sizeof (IHASH) + strlen (name)); | |
181 | ih->nshort = ih->name; | |
182 | } | |
183 | else | |
184 | { | |
185 | char *s; | |
186 | ||
187 | if ((s = strstr (name, fname)) != NULL) | |
188 | { | |
189 | ih = (IHASH *) xmalloc (sizeof (IHASH) + strlen (name)); | |
190 | ih->nshort = ih->name + (s - name); | |
191 | } | |
192 | else | |
193 | { | |
194 | ih = (IHASH *) xmalloc (sizeof (IHASH) + strlen (name) | |
195 | + strlen (fname) + 1); | |
196 | ih->nshort = ih->name + strlen (name) + 1; | |
197 | strcpy ((char *)ih->nshort, fname); | |
198 | } | |
199 | } | |
200 | strcpy ((char *)ih->name, name); | |
201 | ih->foundhere = path; | |
202 | ih->control_macro = NULL; | |
203 | ih->hash = hash; | |
204 | ih->next_this_file = *slot; | |
205 | *slot = ih; | |
206 | return ih; | |
207 | } | |
208 | ||
e576beb0 ZW |
209 | /* Centralize calls to open(2) here. This provides a hook for future |
210 | changes which might, e.g. look for and open a precompiled version | |
211 | of the header. It also means all the magic currently associated | |
212 | with calling open is in one place, and if we ever need more, it'll | |
213 | be in one place too. | |
214 | ||
10e56506 ZW |
215 | We used to open files in nonblocking mode, but that caused more |
216 | problems than it solved. Do take care not to acquire a controlling | |
217 | terminal by mistake (this can't happen on sane systems, but | |
218 | paranoia is a virtue). | |
e576beb0 ZW |
219 | |
220 | Use the three-argument form of open even though we aren't | |
221 | specifying O_CREAT, to defend against broken system headers. */ | |
222 | ||
223 | static inline int | |
224 | open_include_file (pfile, filename) | |
225 | cpp_reader *pfile ATTRIBUTE_UNUSED; | |
226 | const char *filename; | |
227 | { | |
10e56506 | 228 | return open (filename, O_RDONLY|O_NOCTTY, 0666); |
e576beb0 ZW |
229 | } |
230 | ||
0b3d776a ZW |
231 | /* Search for include file FNAME in the include chain starting at |
232 | SEARCH_START. Return -2 if this file doesn't need to be included | |
233 | (because it was included already and it's marked idempotent), | |
234 | -1 if an error occurred, or a file descriptor open on the file. | |
235 | *IHASH is set to point to the include hash entry for this file, and | |
d35364d1 | 236 | *BEFORE is set to 1 if the file was included before (but needs to be read |
0b3d776a | 237 | again). */ |
168d3732 ZW |
238 | static int |
239 | find_include_file (pfile, fname, search_start, ihash, before) | |
add7091b | 240 | cpp_reader *pfile; |
bcc5cac9 | 241 | const char *fname; |
0b3d776a | 242 | struct file_name_list *search_start; |
38b24ee2 | 243 | IHASH **ihash; |
0b3d776a | 244 | int *before; |
add7091b | 245 | { |
d35364d1 ZW |
246 | struct file_name_list *path; |
247 | IHASH *ih, **slot; | |
248 | IHASH dummy; | |
249 | int f; | |
0b3d776a | 250 | char *name; |
0b3d776a | 251 | |
d35364d1 | 252 | dummy.nshort = fname; |
12cf91fe | 253 | dummy.hash = _cpp_calc_hash ((const U_CHAR *)fname, strlen (fname)); |
d35364d1 | 254 | path = (fname[0] == '/') ? ABSOLUTE_PATH : search_start; |
29a72a4f | 255 | slot = (IHASH **) htab_find_slot_with_hash (pfile->all_include_files, |
e38992e8 RK |
256 | (const void *) &dummy, |
257 | dummy.hash, INSERT); | |
0b3d776a | 258 | |
d35364d1 | 259 | if (*slot && (ih = redundant_include_p (pfile, *slot, path))) |
0b3d776a | 260 | { |
d35364d1 ZW |
261 | if (ih == (IHASH *)-1) |
262 | return -2; | |
0b3d776a | 263 | |
d35364d1 ZW |
264 | *before = 1; |
265 | *ihash = ih; | |
e576beb0 | 266 | return open_include_file (pfile, ih->name); |
0b3d776a | 267 | } |
d35364d1 ZW |
268 | |
269 | if (path == ABSOLUTE_PATH) | |
0b3d776a | 270 | { |
d35364d1 | 271 | name = (char *) fname; |
e576beb0 | 272 | f = open_include_file (pfile, name); |
0b3d776a | 273 | } |
d35364d1 | 274 | else |
0b3d776a | 275 | { |
d35364d1 | 276 | /* Search directory path, trying to open the file. */ |
5f6d3823 | 277 | name = (char *) alloca (strlen (fname) + pfile->max_include_len |
d35364d1 ZW |
278 | + 2 + INCLUDE_LEN_FUDGE); |
279 | do | |
0b3d776a | 280 | { |
d35364d1 ZW |
281 | memcpy (name, path->name, path->nlen); |
282 | name[path->nlen] = '/'; | |
283 | strcpy (&name[path->nlen+1], fname); | |
284 | _cpp_simplify_pathname (name); | |
ae79697b | 285 | if (CPP_OPTION (pfile, remap)) |
d35364d1 ZW |
286 | name = remap_filename (pfile, name, path); |
287 | ||
e576beb0 | 288 | f = open_include_file (pfile, name); |
d35364d1 ZW |
289 | #ifdef EACCES |
290 | if (f == -1 && errno == EACCES) | |
291 | { | |
292 | cpp_error (pfile, | |
293 | "included file `%s' exists but is not readable", | |
294 | name); | |
295 | return -1; | |
296 | } | |
0b3d776a | 297 | #endif |
d35364d1 ZW |
298 | if (f >= 0) |
299 | break; | |
300 | path = path->next; | |
301 | } | |
302 | while (path); | |
0b3d776a | 303 | } |
d35364d1 | 304 | if (f == -1) |
0b3d776a | 305 | return -1; |
d35364d1 | 306 | |
f2d5f0cc | 307 | ih = make_IHASH (name, fname, path, dummy.hash, slot); |
d35364d1 ZW |
308 | *before = 0; |
309 | *ihash = ih; | |
310 | return f; | |
add7091b ZW |
311 | } |
312 | ||
f2d5f0cc ZW |
313 | /* Create a dummy IHASH entry for FNAME, and return its name pointer. |
314 | This is used by #line. */ | |
315 | const char * | |
316 | _cpp_fake_ihash (pfile, fname) | |
317 | cpp_reader *pfile; | |
318 | const char *fname; | |
319 | { | |
320 | IHASH *ih, **slot; | |
321 | IHASH dummy; | |
322 | ||
323 | dummy.nshort = fname; | |
12cf91fe | 324 | dummy.hash = _cpp_calc_hash ((const U_CHAR *)fname, strlen (fname)); |
f2d5f0cc | 325 | slot = (IHASH **) htab_find_slot_with_hash (pfile->all_include_files, |
e38992e8 RK |
326 | (const void *) &dummy, |
327 | dummy.hash, INSERT); | |
f2d5f0cc ZW |
328 | if (*slot) |
329 | return (*slot)->name; | |
330 | ih = make_IHASH (fname, 0, ABSOLUTE_PATH, dummy.hash, slot); | |
331 | return ih->name; | |
332 | } | |
333 | ||
334 | ||
add7091b ZW |
335 | /* The file_name_map structure holds a mapping of file names for a |
336 | particular directory. This mapping is read from the file named | |
337 | FILE_NAME_MAP_FILE in that directory. Such a file can be used to | |
338 | map filenames on a file system with severe filename restrictions, | |
339 | such as DOS. The format of the file name map file is just a series | |
340 | of lines with two tokens on each line. The first token is the name | |
341 | to map, and the second token is the actual name to use. */ | |
342 | ||
343 | struct file_name_map | |
344 | { | |
345 | struct file_name_map *map_next; | |
346 | char *map_from; | |
347 | char *map_to; | |
348 | }; | |
349 | ||
350 | #define FILE_NAME_MAP_FILE "header.gcc" | |
351 | ||
352 | /* Read a space delimited string of unlimited length from a stdio | |
353 | file. */ | |
354 | ||
355 | static char * | |
356 | read_filename_string (ch, f) | |
357 | int ch; | |
358 | FILE *f; | |
359 | { | |
360 | char *alloc, *set; | |
361 | int len; | |
362 | ||
363 | len = 20; | |
364 | set = alloc = xmalloc (len + 1); | |
a9ae4483 | 365 | if (! is_space(ch)) |
add7091b ZW |
366 | { |
367 | *set++ = ch; | |
a9ae4483 | 368 | while ((ch = getc (f)) != EOF && ! is_space(ch)) |
add7091b ZW |
369 | { |
370 | if (set - alloc == len) | |
371 | { | |
372 | len *= 2; | |
373 | alloc = xrealloc (alloc, len + 1); | |
374 | set = alloc + len / 2; | |
375 | } | |
376 | *set++ = ch; | |
377 | } | |
378 | } | |
379 | *set = '\0'; | |
380 | ungetc (ch, f); | |
381 | return alloc; | |
382 | } | |
383 | ||
384 | /* This structure holds a linked list of file name maps, one per directory. */ | |
385 | ||
386 | struct file_name_map_list | |
387 | { | |
388 | struct file_name_map_list *map_list_next; | |
389 | char *map_list_name; | |
390 | struct file_name_map *map_list_map; | |
391 | }; | |
392 | ||
393 | /* Read the file name map file for DIRNAME. */ | |
394 | ||
395 | static struct file_name_map * | |
396 | read_name_map (pfile, dirname) | |
397 | cpp_reader *pfile; | |
460ee112 | 398 | const char *dirname; |
add7091b ZW |
399 | { |
400 | register struct file_name_map_list *map_list_ptr; | |
401 | char *name; | |
402 | FILE *f; | |
403 | ||
ae79697b | 404 | for (map_list_ptr = CPP_OPTION (pfile, map_list); map_list_ptr; |
add7091b ZW |
405 | map_list_ptr = map_list_ptr->map_list_next) |
406 | if (! strcmp (map_list_ptr->map_list_name, dirname)) | |
407 | return map_list_ptr->map_list_map; | |
408 | ||
409 | map_list_ptr = ((struct file_name_map_list *) | |
410 | xmalloc (sizeof (struct file_name_map_list))); | |
c49445e0 | 411 | map_list_ptr->map_list_name = xstrdup (dirname); |
add7091b ZW |
412 | |
413 | name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2); | |
414 | strcpy (name, dirname); | |
415 | if (*dirname) | |
416 | strcat (name, "/"); | |
417 | strcat (name, FILE_NAME_MAP_FILE); | |
418 | f = fopen (name, "r"); | |
419 | if (!f) | |
0b3d776a | 420 | map_list_ptr->map_list_map = (struct file_name_map *)-1; |
add7091b ZW |
421 | else |
422 | { | |
423 | int ch; | |
424 | int dirlen = strlen (dirname); | |
425 | ||
426 | while ((ch = getc (f)) != EOF) | |
427 | { | |
428 | char *from, *to; | |
429 | struct file_name_map *ptr; | |
430 | ||
a9ae4483 | 431 | if (is_space(ch)) |
add7091b ZW |
432 | continue; |
433 | from = read_filename_string (ch, f); | |
a9ae4483 | 434 | while ((ch = getc (f)) != EOF && is_hspace(ch)) |
add7091b ZW |
435 | ; |
436 | to = read_filename_string (ch, f); | |
437 | ||
438 | ptr = ((struct file_name_map *) | |
439 | xmalloc (sizeof (struct file_name_map))); | |
440 | ptr->map_from = from; | |
441 | ||
442 | /* Make the real filename absolute. */ | |
443 | if (*to == '/') | |
444 | ptr->map_to = to; | |
445 | else | |
446 | { | |
447 | ptr->map_to = xmalloc (dirlen + strlen (to) + 2); | |
448 | strcpy (ptr->map_to, dirname); | |
449 | ptr->map_to[dirlen] = '/'; | |
450 | strcpy (ptr->map_to + dirlen + 1, to); | |
451 | free (to); | |
452 | } | |
453 | ||
454 | ptr->map_next = map_list_ptr->map_list_map; | |
455 | map_list_ptr->map_list_map = ptr; | |
456 | ||
457 | while ((ch = getc (f)) != '\n') | |
458 | if (ch == EOF) | |
459 | break; | |
460 | } | |
461 | fclose (f); | |
462 | } | |
463 | ||
ae79697b ZW |
464 | map_list_ptr->map_list_next = CPP_OPTION (pfile, map_list); |
465 | CPP_OPTION (pfile, map_list) = map_list_ptr; | |
add7091b ZW |
466 | |
467 | return map_list_ptr->map_list_map; | |
468 | } | |
469 | ||
0b3d776a | 470 | /* Remap NAME based on the file_name_map (if any) for LOC. */ |
add7091b | 471 | |
0b3d776a ZW |
472 | static char * |
473 | remap_filename (pfile, name, loc) | |
add7091b | 474 | cpp_reader *pfile; |
0b3d776a ZW |
475 | char *name; |
476 | struct file_name_list *loc; | |
add7091b | 477 | { |
0b3d776a | 478 | struct file_name_map *map; |
460ee112 | 479 | const char *from, *p, *dir; |
add7091b | 480 | |
0b3d776a ZW |
481 | if (! loc->name_map) |
482 | loc->name_map = read_name_map (pfile, | |
483 | loc->name | |
484 | ? loc->name : "."); | |
add7091b | 485 | |
0b3d776a ZW |
486 | if (loc->name_map == (struct file_name_map *)-1) |
487 | return name; | |
488 | ||
489 | from = name + strlen (loc->name) + 1; | |
490 | ||
491 | for (map = loc->name_map; map; map = map->map_next) | |
492 | if (!strcmp (map->map_from, from)) | |
493 | return map->map_to; | |
494 | ||
495 | /* Try to find a mapping file for the particular directory we are | |
496 | looking in. Thus #include <sys/types.h> will look up sys/types.h | |
497 | in /usr/include/header.gcc and look up types.h in | |
498 | /usr/include/sys/header.gcc. */ | |
7ceb3598 | 499 | p = strrchr (name, '/'); |
0b3d776a ZW |
500 | if (!p) |
501 | p = name; | |
502 | if (loc && loc->name | |
503 | && strlen (loc->name) == (size_t) (p - name) | |
504 | && !strncmp (loc->name, name, p - name)) | |
505 | /* FILENAME is in SEARCHPTR, which we've already checked. */ | |
506 | return name; | |
507 | ||
508 | if (p == name) | |
509 | { | |
510 | dir = "."; | |
511 | from = name; | |
512 | } | |
513 | else | |
514 | { | |
460ee112 | 515 | char * newdir = (char *) alloca (p - name + 1); |
7ceb3598 | 516 | memcpy (newdir, name, p - name); |
460ee112 KG |
517 | newdir[p - name] = '\0'; |
518 | dir = newdir; | |
0b3d776a | 519 | from = p + 1; |
add7091b | 520 | } |
0b3d776a ZW |
521 | |
522 | for (map = read_name_map (pfile, dir); map; map = map->map_next) | |
523 | if (! strcmp (map->map_from, name)) | |
524 | return map->map_to; | |
add7091b | 525 | |
0b3d776a | 526 | return name; |
add7091b ZW |
527 | } |
528 | ||
168d3732 ZW |
529 | |
530 | void | |
12cf91fe | 531 | _cpp_execute_include (pfile, f, len, no_reinclude, search_start) |
168d3732 | 532 | cpp_reader *pfile; |
12cf91fe | 533 | U_CHAR *f; |
168d3732 ZW |
534 | unsigned int len; |
535 | int no_reinclude; | |
536 | struct file_name_list *search_start; | |
537 | { | |
538 | IHASH *ihash; | |
12cf91fe | 539 | char *fname = (char *)f; |
168d3732 ZW |
540 | int fd; |
541 | int angle_brackets = fname[0] == '<'; | |
542 | int before; | |
543 | ||
544 | if (!search_start) | |
545 | { | |
546 | if (angle_brackets) | |
ae79697b ZW |
547 | search_start = CPP_OPTION (pfile, bracket_include); |
548 | else if (CPP_OPTION (pfile, ignore_srcdir)) | |
549 | search_start = CPP_OPTION (pfile, quote_include); | |
168d3732 ZW |
550 | else |
551 | search_start = CPP_BUFFER (pfile)->actual_dir; | |
552 | } | |
553 | ||
554 | if (!search_start) | |
555 | { | |
556 | cpp_error (pfile, "No include path in which to find %s", fname); | |
557 | return; | |
558 | } | |
559 | ||
560 | /* Remove quote marks. */ | |
561 | fname++; | |
562 | len -= 2; | |
563 | fname[len] = '\0'; | |
564 | ||
565 | fd = find_include_file (pfile, fname, search_start, &ihash, &before); | |
566 | ||
567 | if (fd == -2) | |
568 | return; | |
569 | ||
570 | if (fd == -1) | |
571 | { | |
ae79697b | 572 | if (CPP_OPTION (pfile, print_deps_missing_files) |
168d3732 ZW |
573 | && CPP_PRINT_DEPS (pfile) > (angle_brackets || |
574 | (pfile->system_include_depth > 0))) | |
575 | { | |
576 | if (!angle_brackets) | |
577 | deps_add_dep (pfile->deps, fname); | |
578 | else | |
579 | { | |
580 | char *p; | |
581 | struct file_name_list *ptr; | |
582 | /* If requested as a system header, assume it belongs in | |
583 | the first system header directory. */ | |
ae79697b ZW |
584 | if (CPP_OPTION (pfile, bracket_include)) |
585 | ptr = CPP_OPTION (pfile, bracket_include); | |
168d3732 | 586 | else |
ae79697b | 587 | ptr = CPP_OPTION (pfile, quote_include); |
168d3732 ZW |
588 | |
589 | p = (char *) alloca (strlen (ptr->name) | |
590 | + strlen (fname) + 2); | |
591 | if (*ptr->name != '\0') | |
592 | { | |
593 | strcpy (p, ptr->name); | |
594 | strcat (p, "/"); | |
595 | } | |
596 | strcat (p, fname); | |
597 | deps_add_dep (pfile->deps, p); | |
598 | } | |
599 | } | |
600 | /* If -M was specified, and this header file won't be added to | |
601 | the dependency list, then don't count this as an error, | |
602 | because we can still produce correct output. Otherwise, we | |
603 | can't produce correct output, because there may be | |
604 | dependencies we need inside the missing file, and we don't | |
605 | know what directory this missing file exists in. */ | |
606 | else if (CPP_PRINT_DEPS (pfile) | |
607 | && (CPP_PRINT_DEPS (pfile) | |
608 | <= (angle_brackets || (pfile->system_include_depth > 0)))) | |
609 | cpp_warning (pfile, "No include path in which to find %s", fname); | |
610 | else | |
611 | cpp_error_from_errno (pfile, fname); | |
612 | ||
613 | return; | |
614 | } | |
615 | ||
616 | /* For -M, add the file to the dependencies on its first inclusion. */ | |
617 | if (!before && (CPP_PRINT_DEPS (pfile) | |
618 | > (angle_brackets || (pfile->system_include_depth > 0)))) | |
619 | deps_add_dep (pfile->deps, ihash->name); | |
620 | ||
621 | /* Handle -H option. */ | |
ae79697b | 622 | if (CPP_OPTION (pfile, print_include_names)) |
168d3732 ZW |
623 | { |
624 | cpp_buffer *fp = CPP_BUFFER (pfile); | |
625 | while ((fp = CPP_PREV_BUFFER (fp)) != NULL) | |
626 | putc ('.', stderr); | |
627 | fprintf (stderr, " %s\n", ihash->name); | |
628 | } | |
629 | ||
f2d5f0cc | 630 | /* Actually process the file. */ |
168d3732 | 631 | if (no_reinclude) |
12cf91fe | 632 | ihash->control_macro = U""; |
168d3732 ZW |
633 | |
634 | if (read_include_file (pfile, fd, ihash)) | |
635 | { | |
168d3732 | 636 | if (angle_brackets) |
c56c2073 | 637 | pfile->system_include_depth++; |
168d3732 ZW |
638 | } |
639 | } | |
640 | ||
641 | ||
c45da1ca ZW |
642 | /* Push an input buffer and load it up with the contents of FNAME. |
643 | If FNAME is "" or NULL, read standard input. */ | |
644 | int | |
645 | cpp_read_file (pfile, fname) | |
646 | cpp_reader *pfile; | |
647 | const char *fname; | |
648 | { | |
d35364d1 ZW |
649 | IHASH *ih, **slot; |
650 | IHASH dummy; | |
c45da1ca ZW |
651 | int f; |
652 | ||
d35364d1 ZW |
653 | if (fname == NULL) |
654 | fname = ""; | |
655 | ||
d35364d1 | 656 | dummy.nshort = fname; |
c6b5cb46 ZW |
657 | /* _cpp_calc_hash doesn't like zero-length strings. */ |
658 | if (*fname == 0) | |
659 | dummy.hash = 0; | |
660 | else | |
12cf91fe | 661 | dummy.hash = _cpp_calc_hash ((const U_CHAR *)fname, strlen (fname)); |
29a72a4f ZW |
662 | slot = (IHASH **) htab_find_slot_with_hash (pfile->all_include_files, |
663 | (const void *) &dummy, | |
e38992e8 | 664 | dummy.hash, INSERT); |
d35364d1 | 665 | if (*slot && (ih = redundant_include_p (pfile, *slot, ABSOLUTE_PATH))) |
c45da1ca | 666 | { |
e38992e8 | 667 | if (ih == (IHASH *) -1) |
d35364d1 | 668 | return 1; /* Already included. */ |
c45da1ca | 669 | } |
d35364d1 | 670 | else |
f2d5f0cc | 671 | ih = make_IHASH (fname, 0, ABSOLUTE_PATH, dummy.hash, slot); |
c45da1ca | 672 | |
d35364d1 ZW |
673 | if (*fname == '\0') |
674 | f = 0; | |
675 | else | |
e576beb0 | 676 | f = open_include_file (pfile, fname); |
c45da1ca | 677 | |
168d3732 | 678 | return read_include_file (pfile, f, ih); |
c45da1ca ZW |
679 | } |
680 | ||
0b3d776a ZW |
681 | /* Read the contents of FD into the buffer on the top of PFILE's stack. |
682 | IHASH points to the include hash entry for the file associated with | |
683 | FD. | |
add7091b ZW |
684 | |
685 | The caller is responsible for the cpp_push_buffer. */ | |
686 | ||
168d3732 ZW |
687 | static int |
688 | read_include_file (pfile, fd, ihash) | |
add7091b | 689 | cpp_reader *pfile; |
0b3d776a | 690 | int fd; |
38b24ee2 | 691 | IHASH *ihash; |
add7091b ZW |
692 | { |
693 | struct stat st; | |
f8f769ea | 694 | ssize_t length; |
0b3d776a | 695 | cpp_buffer *fp; |
add7091b | 696 | |
d35364d1 ZW |
697 | fp = cpp_push_buffer (pfile, NULL, 0); |
698 | ||
699 | if (fp == 0) | |
700 | goto push_fail; | |
701 | ||
0b3d776a ZW |
702 | if (fstat (fd, &st) < 0) |
703 | goto perror_fail; | |
554fbeef | 704 | |
f8f769ea ZW |
705 | /* If fd points to a plain file, we might be able to mmap it; we can |
706 | definitely allocate the buffer all at once. If fd is a pipe or | |
707 | terminal, we can't do either. If fd is something weird, like a | |
708 | block device or a directory, we don't want to read it at all. | |
6458033d ZW |
709 | |
710 | Unfortunately, different systems use different st.st_mode values | |
711 | for pipes: some have S_ISFIFO, some S_ISSOCK, some are buggy and | |
10e56506 ZW |
712 | zero the entire struct stat except a couple fields. Hence we don't |
713 | even try to figure out what something is, except for plain files, | |
f8f769ea | 714 | directories, and block devices. */ |
6458033d | 715 | |
0b3d776a ZW |
716 | if (S_ISREG (st.st_mode)) |
717 | { | |
f8f769ea ZW |
718 | ssize_t st_size; |
719 | ||
720 | /* off_t might have a wider range than ssize_t - in other words, | |
554fbeef | 721 | the max size of a file might be bigger than the address |
6458033d | 722 | space. We can't handle a file that large. (Anyone with |
f8f769ea | 723 | a single source file bigger than 2GB needs to rethink |
6458033d | 724 | their coding style.) */ |
f8f769ea | 725 | if (st.st_size > SSIZE_MAX) |
554fbeef | 726 | { |
f8f769ea | 727 | cpp_error (pfile, "%s is too large", ihash->name); |
554fbeef ZW |
728 | goto fail; |
729 | } | |
f8f769ea ZW |
730 | st_size = st.st_size; |
731 | length = read_file (fp, fd, st_size); | |
732 | if (length == -1) | |
733 | goto perror_fail; | |
734 | if (length < st_size) | |
735 | cpp_warning (pfile, "%s is shorter than expected\n", ihash->name); | |
add7091b | 736 | } |
10e56506 | 737 | else if (S_ISBLK (st.st_mode)) |
0b3d776a | 738 | { |
10e56506 ZW |
739 | cpp_error (pfile, "%s is a block device", ihash->name); |
740 | goto fail; | |
0b3d776a | 741 | } |
10e56506 | 742 | else if (S_ISDIR (st.st_mode)) |
0b3d776a | 743 | { |
10e56506 | 744 | cpp_error (pfile, "%s is a directory", ihash->name); |
554fbeef | 745 | goto fail; |
add7091b | 746 | } |
10e56506 ZW |
747 | else |
748 | { | |
f8f769ea ZW |
749 | /* 8 kilobytes is a sensible starting size. It ought to be |
750 | bigger than the kernel pipe buffer, and it's definitely | |
751 | bigger than the majority of C source files. */ | |
752 | length = read_with_read (fp, fd, 8 * 1024); | |
753 | if (length == -1) | |
754 | goto perror_fail; | |
10e56506 | 755 | } |
add7091b | 756 | |
f8f769ea | 757 | /* These must be set before prescan. */ |
554fbeef | 758 | fp->ihash = ihash; |
38b24ee2 | 759 | fp->nominal_fname = ihash->name; |
f8f769ea | 760 | |
554fbeef | 761 | if (length == 0) |
12cf91fe | 762 | ihash->control_macro = U""; /* never re-include */ |
f8f769ea ZW |
763 | else |
764 | /* Temporary - I hope. */ | |
765 | length = _cpp_prescan (pfile, fp, length); | |
add7091b | 766 | |
ff2b53ef | 767 | fp->rlimit = fp->buf + length; |
554fbeef | 768 | fp->cur = fp->buf; |
0b22d65c | 769 | if (ihash->foundhere != ABSOLUTE_PATH) |
f8f769ea | 770 | fp->system_header_p = ihash->foundhere->sysp; |
554fbeef | 771 | fp->lineno = 1; |
099a9dd0 | 772 | fp->line_base = fp->buf; |
554fbeef ZW |
773 | |
774 | /* The ->actual_dir field is only used when ignore_srcdir is not in effect; | |
775 | see do_include */ | |
ae79697b | 776 | if (!CPP_OPTION (pfile, ignore_srcdir)) |
38b24ee2 | 777 | fp->actual_dir = actual_directory (pfile, ihash->name); |
554fbeef | 778 | |
add7091b | 779 | pfile->input_stack_listing_current = 0; |
d35364d1 | 780 | pfile->only_seen_white = 2; |
f8f769ea | 781 | close (fd); |
add7091b ZW |
782 | return 1; |
783 | ||
0b3d776a | 784 | perror_fail: |
0b3d776a ZW |
785 | cpp_error_from_errno (pfile, ihash->name); |
786 | fail: | |
554fbeef | 787 | cpp_pop_buffer (pfile); |
d35364d1 | 788 | push_fail: |
0b3d776a ZW |
789 | close (fd); |
790 | return 0; | |
add7091b ZW |
791 | } |
792 | ||
f8f769ea ZW |
793 | static ssize_t |
794 | read_file (fp, fd, size) | |
795 | cpp_buffer *fp; | |
796 | int fd; | |
797 | ssize_t size; | |
798 | { | |
799 | static int pagesize = -1; | |
800 | ||
801 | if (size == 0) | |
802 | return 0; | |
803 | ||
804 | if (pagesize == -1) | |
805 | pagesize = getpagesize (); | |
806 | ||
807 | #if MMAP_THRESHOLD | |
808 | if (size / pagesize >= MMAP_THRESHOLD) | |
809 | { | |
810 | const U_CHAR *result | |
811 | = (const U_CHAR *) mmap (0, size, PROT_READ, MAP_PRIVATE, fd, 0); | |
812 | if (result != (const U_CHAR *)-1) | |
813 | { | |
814 | fp->buf = result; | |
815 | fp->mapped = 1; | |
816 | return size; | |
817 | } | |
818 | } | |
819 | /* If mmap fails, try read. If there's really a problem, read will | |
820 | fail too. */ | |
821 | #endif | |
822 | ||
823 | return read_with_read (fp, fd, size); | |
824 | } | |
825 | ||
826 | static ssize_t | |
827 | read_with_read (fp, fd, size) | |
828 | cpp_buffer *fp; | |
829 | int fd; | |
830 | ssize_t size; | |
831 | { | |
832 | ssize_t offset, count; | |
833 | U_CHAR *buf; | |
834 | ||
835 | buf = (U_CHAR *) xmalloc (size); | |
836 | offset = 0; | |
837 | while ((count = read (fd, buf + offset, size - offset)) > 0) | |
838 | { | |
839 | offset += count; | |
840 | if (offset == size) | |
841 | buf = xrealloc (buf, (size *= 2)); | |
842 | } | |
843 | if (count < 0) | |
844 | { | |
845 | free (buf); | |
846 | return -1; | |
847 | } | |
848 | if (offset == 0) | |
849 | { | |
850 | free (buf); | |
851 | return 0; | |
852 | } | |
853 | ||
854 | if (offset < size) | |
855 | buf = xrealloc (buf, offset); | |
856 | fp->buf = buf; | |
857 | fp->mapped = 0; | |
858 | return offset; | |
859 | } | |
860 | ||
6458033d ZW |
861 | /* Given a path FNAME, extract the directory component and place it |
862 | onto the actual_dirs list. Return a pointer to the allocated | |
863 | file_name_list structure. These structures are used to implement | |
864 | current-directory "" include searching. */ | |
865 | ||
f1a86df6 ZW |
866 | static struct file_name_list * |
867 | actual_directory (pfile, fname) | |
868 | cpp_reader *pfile; | |
bcc5cac9 | 869 | const char *fname; |
f1a86df6 ZW |
870 | { |
871 | char *last_slash, *dir; | |
872 | size_t dlen; | |
873 | struct file_name_list *x; | |
874 | ||
c49445e0 | 875 | dir = xstrdup (fname); |
7ceb3598 | 876 | last_slash = strrchr (dir, '/'); |
f1a86df6 ZW |
877 | if (last_slash) |
878 | { | |
879 | if (last_slash == dir) | |
880 | { | |
881 | dlen = 1; | |
882 | last_slash[1] = '\0'; | |
883 | } | |
884 | else | |
885 | { | |
886 | dlen = last_slash - dir; | |
887 | *last_slash = '\0'; | |
888 | } | |
889 | } | |
890 | else | |
891 | { | |
892 | dir[0] = '.'; | |
893 | dir[1] = '\0'; | |
894 | dlen = 1; | |
895 | } | |
896 | ||
897 | if (dlen > pfile->max_include_len) | |
898 | pfile->max_include_len = dlen; | |
899 | ||
900 | for (x = pfile->actual_dirs; x; x = x->alloc) | |
901 | if (!strcmp (x->name, dir)) | |
902 | { | |
903 | free (dir); | |
904 | return x; | |
905 | } | |
906 | ||
907 | /* Not found, make a new one. */ | |
908 | x = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); | |
909 | x->name = dir; | |
910 | x->nlen = dlen; | |
ae79697b | 911 | x->next = CPP_OPTION (pfile, quote_include); |
f1a86df6 | 912 | x->alloc = pfile->actual_dirs; |
0b22d65c | 913 | x->sysp = CPP_BUFFER (pfile)->system_header_p; |
f1a86df6 ZW |
914 | x->name_map = NULL; |
915 | ||
916 | pfile->actual_dirs = x; | |
917 | return x; | |
918 | } | |
919 | ||
0b3d776a ZW |
920 | /* Simplify a path name in place, deleting redundant components. This |
921 | reduces OS overhead and guarantees that equivalent paths compare | |
922 | the same (modulo symlinks). | |
923 | ||
924 | Transforms made: | |
925 | foo/bar/../quux foo/quux | |
926 | foo/./bar foo/bar | |
927 | foo//bar foo/bar | |
928 | /../quux /quux | |
929 | //quux //quux (POSIX allows leading // as a namespace escape) | |
930 | ||
931 | Guarantees no trailing slashes. All transforms reduce the length | |
932 | of the string. | |
933 | */ | |
0b22d65c | 934 | void |
b0699dad | 935 | _cpp_simplify_pathname (path) |
21380ab0 | 936 | char *path; |
0b3d776a ZW |
937 | { |
938 | char *from, *to; | |
939 | char *base; | |
940 | int absolute = 0; | |
941 | ||
509781a4 | 942 | #if defined (HAVE_DOS_BASED_FILE_SYSTEM) |
0b3d776a ZW |
943 | /* Convert all backslashes to slashes. */ |
944 | for (from = path; *from; from++) | |
945 | if (*from == '\\') *from = '/'; | |
946 | ||
947 | /* Skip over leading drive letter if present. */ | |
948 | if (ISALPHA (path[0]) && path[1] == ':') | |
949 | from = to = &path[2]; | |
950 | else | |
951 | from = to = path; | |
952 | #else | |
953 | from = to = path; | |
954 | #endif | |
955 | ||
956 | /* Remove redundant initial /s. */ | |
957 | if (*from == '/') | |
958 | { | |
959 | absolute = 1; | |
960 | to++; | |
961 | from++; | |
962 | if (*from == '/') | |
963 | { | |
964 | if (*++from == '/') | |
965 | /* 3 or more initial /s are equivalent to 1 /. */ | |
966 | while (*++from == '/'); | |
967 | else | |
968 | /* On some hosts // differs from /; Posix allows this. */ | |
969 | to++; | |
970 | } | |
971 | } | |
972 | base = to; | |
973 | ||
974 | for (;;) | |
975 | { | |
976 | while (*from == '/') | |
977 | from++; | |
978 | ||
979 | if (from[0] == '.' && from[1] == '/') | |
980 | from += 2; | |
981 | else if (from[0] == '.' && from[1] == '\0') | |
982 | goto done; | |
983 | else if (from[0] == '.' && from[1] == '.' && from[2] == '/') | |
984 | { | |
985 | if (base == to) | |
986 | { | |
987 | if (absolute) | |
988 | from += 3; | |
989 | else | |
990 | { | |
991 | *to++ = *from++; | |
992 | *to++ = *from++; | |
993 | *to++ = *from++; | |
994 | base = to; | |
995 | } | |
996 | } | |
997 | else | |
998 | { | |
999 | to -= 2; | |
1000 | while (to > base && *to != '/') to--; | |
1001 | if (*to == '/') | |
1002 | to++; | |
1003 | from += 3; | |
1004 | } | |
1005 | } | |
1006 | else if (from[0] == '.' && from[1] == '.' && from[2] == '\0') | |
1007 | { | |
1008 | if (base == to) | |
1009 | { | |
1010 | if (!absolute) | |
1011 | { | |
1012 | *to++ = *from++; | |
1013 | *to++ = *from++; | |
1014 | } | |
1015 | } | |
1016 | else | |
1017 | { | |
1018 | to -= 2; | |
1019 | while (to > base && *to != '/') to--; | |
1020 | if (*to == '/') | |
1021 | to++; | |
1022 | } | |
1023 | goto done; | |
1024 | } | |
1025 | else | |
1026 | /* Copy this component and trailing /, if any. */ | |
1027 | while ((*to++ = *from++) != '/') | |
1028 | { | |
1029 | if (!to[-1]) | |
1030 | { | |
1031 | to--; | |
1032 | goto done; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | } | |
1037 | ||
1038 | done: | |
1039 | /* Trim trailing slash */ | |
1040 | if (to[0] == '/' && (!absolute || to > path+1)) | |
1041 | to--; | |
1042 | ||
1043 | /* Change the empty string to "." so that stat() on the result | |
1044 | will always work. */ | |
1045 | if (to == path) | |
1046 | *to++ = '.'; | |
1047 | ||
1048 | *to = '\0'; | |
1049 | ||
1050 | return; | |
1051 | } | |
1052 | ||
1053 | /* It is not clear when this should be used if at all, so I've | |
1054 | disabled it until someone who understands VMS can look at it. */ | |
1055 | #if 0 | |
add7091b ZW |
1056 | |
1057 | /* Under VMS we need to fix up the "include" specification filename. | |
1058 | ||
1059 | Rules for possible conversions | |
1060 | ||
1061 | fullname tried paths | |
1062 | ||
1063 | name name | |
1064 | ./dir/name [.dir]name | |
1065 | /dir/name dir:name | |
1066 | /name [000000]name, name | |
1067 | dir/name dir:[000000]name, dir:name, dir/name | |
1068 | dir1/dir2/name dir1:[dir2]name, dir1:[000000.dir2]name | |
1069 | path:/name path:[000000]name, path:name | |
1070 | path:/dir/name path:[000000.dir]name, path:[dir]name | |
1071 | path:dir/name path:[dir]name | |
1072 | [path]:[dir]name [path.dir]name | |
1073 | path/[dir]name [path.dir]name | |
1074 | ||
1075 | The path:/name input is constructed when expanding <> includes. */ | |
1076 | ||
1077 | ||
1078 | static void | |
1079 | hack_vms_include_specification (fullname) | |
1080 | char *fullname; | |
1081 | { | |
1082 | register char *basename, *unixname, *local_ptr, *first_slash; | |
1083 | int f, check_filename_before_returning, must_revert; | |
1084 | char Local[512]; | |
1085 | ||
1086 | check_filename_before_returning = 0; | |
1087 | must_revert = 0; | |
1088 | /* See if we can find a 1st slash. If not, there's no path information. */ | |
7ceb3598 | 1089 | first_slash = strchr (fullname, '/'); |
add7091b ZW |
1090 | if (first_slash == 0) |
1091 | return 0; /* Nothing to do!!! */ | |
1092 | ||
1093 | /* construct device spec if none given. */ | |
1094 | ||
7ceb3598 | 1095 | if (strchr (fullname, ':') == 0) |
add7091b ZW |
1096 | { |
1097 | ||
1098 | /* If fullname has a slash, take it as device spec. */ | |
1099 | ||
1100 | if (first_slash == fullname) | |
1101 | { | |
7ceb3598 | 1102 | first_slash = strchr (fullname + 1, '/'); /* 2nd slash ? */ |
add7091b ZW |
1103 | if (first_slash) |
1104 | *first_slash = ':'; /* make device spec */ | |
1105 | for (basename = fullname; *basename != 0; basename++) | |
1106 | *basename = *(basename+1); /* remove leading slash */ | |
1107 | } | |
1108 | else if ((first_slash[-1] != '.') /* keep ':/', './' */ | |
1109 | && (first_slash[-1] != ':') | |
1110 | && (first_slash[-1] != ']')) /* or a vms path */ | |
1111 | { | |
1112 | *first_slash = ':'; | |
1113 | } | |
1114 | else if ((first_slash[1] == '[') /* skip './' in './[dir' */ | |
1115 | && (first_slash[-1] == '.')) | |
1116 | fullname += 2; | |
1117 | } | |
1118 | ||
1119 | /* Get part after first ':' (basename[-1] == ':') | |
1120 | or last '/' (basename[-1] == '/'). */ | |
1121 | ||
1122 | basename = base_name (fullname); | |
1123 | ||
1124 | local_ptr = Local; /* initialize */ | |
1125 | ||
1126 | /* We are trying to do a number of things here. First of all, we are | |
1127 | trying to hammer the filenames into a standard format, such that later | |
1128 | processing can handle them. | |
1129 | ||
1130 | If the file name contains something like [dir.], then it recognizes this | |
1131 | as a root, and strips the ".]". Later processing will add whatever is | |
1132 | needed to get things working properly. | |
1133 | ||
1134 | If no device is specified, then the first directory name is taken to be | |
1135 | a device name (or a rooted logical). */ | |
1136 | ||
1137 | /* Point to the UNIX filename part (which needs to be fixed!) | |
1138 | but skip vms path information. | |
1139 | [basename != fullname since first_slash != 0]. */ | |
1140 | ||
1141 | if ((basename[-1] == ':') /* vms path spec. */ | |
1142 | || (basename[-1] == ']') | |
1143 | || (basename[-1] == '>')) | |
1144 | unixname = basename; | |
1145 | else | |
1146 | unixname = fullname; | |
1147 | ||
1148 | if (*unixname == '/') | |
1149 | unixname++; | |
1150 | ||
1151 | /* If the directory spec is not rooted, we can just copy | |
1152 | the UNIX filename part and we are done. */ | |
1153 | ||
1154 | if (((basename - fullname) > 1) | |
1155 | && ( (basename[-1] == ']') | |
1156 | || (basename[-1] == '>'))) | |
1157 | { | |
1158 | if (basename[-2] != '.') | |
1159 | { | |
1160 | ||
1161 | /* The VMS part ends in a `]', and the preceding character is not a `.'. | |
1162 | -> PATH]:/name (basename = '/name', unixname = 'name') | |
1163 | We strip the `]', and then splice the two parts of the name in the | |
86702e31 | 1164 | usual way. Given the default locations for include files, |
add7091b ZW |
1165 | we will only use this code if the user specifies alternate locations |
1166 | with the /include (-I) switch on the command line. */ | |
1167 | ||
1168 | basename -= 1; /* Strip "]" */ | |
1169 | unixname--; /* backspace */ | |
1170 | } | |
1171 | else | |
1172 | { | |
1173 | ||
1174 | /* The VMS part has a ".]" at the end, and this will not do. Later | |
1175 | processing will add a second directory spec, and this would be a syntax | |
1176 | error. Thus we strip the ".]", and thus merge the directory specs. | |
1177 | We also backspace unixname, so that it points to a '/'. This inhibits the | |
1178 | generation of the 000000 root directory spec (which does not belong here | |
1179 | in this case). */ | |
1180 | ||
1181 | basename -= 2; /* Strip ".]" */ | |
1182 | unixname--; /* backspace */ | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | else | |
1187 | ||
1188 | { | |
1189 | ||
1190 | /* We drop in here if there is no VMS style directory specification yet. | |
1191 | If there is no device specification either, we make the first dir a | |
1192 | device and try that. If we do not do this, then we will be essentially | |
1193 | searching the users default directory (as if they did a #include "asdf.h"). | |
1194 | ||
1195 | Then all we need to do is to push a '[' into the output string. Later | |
1196 | processing will fill this in, and close the bracket. */ | |
1197 | ||
1198 | if ((unixname != fullname) /* vms path spec found. */ | |
1199 | && (basename[-1] != ':')) | |
1200 | *local_ptr++ = ':'; /* dev not in spec. take first dir */ | |
1201 | ||
1202 | *local_ptr++ = '['; /* Open the directory specification */ | |
1203 | } | |
1204 | ||
1205 | if (unixname == fullname) /* no vms dir spec. */ | |
1206 | { | |
1207 | must_revert = 1; | |
1208 | if ((first_slash != 0) /* unix dir spec. */ | |
1209 | && (*unixname != '/') /* not beginning with '/' */ | |
1210 | && (*unixname != '.')) /* or './' or '../' */ | |
1211 | *local_ptr++ = '.'; /* dir is local ! */ | |
1212 | } | |
1213 | ||
1214 | /* at this point we assume that we have the device spec, and (at least | |
1215 | the opening "[" for a directory specification. We may have directories | |
1216 | specified already. | |
1217 | ||
1218 | If there are no other slashes then the filename will be | |
1219 | in the "root" directory. Otherwise, we need to add | |
1220 | directory specifications. */ | |
1221 | ||
7ceb3598 | 1222 | if (strchr (unixname, '/') == 0) |
add7091b ZW |
1223 | { |
1224 | /* if no directories specified yet and none are following. */ | |
1225 | if (local_ptr[-1] == '[') | |
1226 | { | |
1227 | /* Just add "000000]" as the directory string */ | |
1228 | strcpy (local_ptr, "000000]"); | |
1229 | local_ptr += strlen (local_ptr); | |
1230 | check_filename_before_returning = 1; /* we might need to fool with this later */ | |
1231 | } | |
1232 | } | |
1233 | else | |
1234 | { | |
1235 | ||
1236 | /* As long as there are still subdirectories to add, do them. */ | |
7ceb3598 | 1237 | while (strchr (unixname, '/') != 0) |
add7091b ZW |
1238 | { |
1239 | /* If this token is "." we can ignore it | |
1240 | if it's not at the beginning of a path. */ | |
1241 | if ((unixname[0] == '.') && (unixname[1] == '/')) | |
1242 | { | |
1243 | /* remove it at beginning of path. */ | |
1244 | if ( ((unixname == fullname) /* no device spec */ | |
1245 | && (fullname+2 != basename)) /* starts with ./ */ | |
1246 | /* or */ | |
1247 | || ((basename[-1] == ':') /* device spec */ | |
1248 | && (unixname-1 == basename))) /* and ./ afterwards */ | |
1249 | *local_ptr++ = '.'; /* make '[.' start of path. */ | |
1250 | unixname += 2; | |
1251 | continue; | |
1252 | } | |
1253 | ||
1254 | /* Add a subdirectory spec. Do not duplicate "." */ | |
1255 | if ( local_ptr[-1] != '.' | |
1256 | && local_ptr[-1] != '[' | |
1257 | && local_ptr[-1] != '<') | |
1258 | *local_ptr++ = '.'; | |
1259 | ||
1260 | /* If this is ".." then the spec becomes "-" */ | |
1261 | if ( (unixname[0] == '.') | |
1262 | && (unixname[1] == '.') | |
1263 | && (unixname[2] == '/')) | |
1264 | { | |
1265 | /* Add "-" and skip the ".." */ | |
1266 | if ((local_ptr[-1] == '.') | |
1267 | && (local_ptr[-2] == '[')) | |
1268 | local_ptr--; /* prevent [.- */ | |
1269 | *local_ptr++ = '-'; | |
1270 | unixname += 3; | |
1271 | continue; | |
1272 | } | |
1273 | ||
1274 | /* Copy the subdirectory */ | |
1275 | while (*unixname != '/') | |
1276 | *local_ptr++= *unixname++; | |
1277 | ||
1278 | unixname++; /* Skip the "/" */ | |
1279 | } | |
1280 | ||
1281 | /* Close the directory specification */ | |
1282 | if (local_ptr[-1] == '.') /* no trailing periods */ | |
1283 | local_ptr--; | |
1284 | ||
1285 | if (local_ptr[-1] == '[') /* no dir needed */ | |
1286 | local_ptr--; | |
1287 | else | |
1288 | *local_ptr++ = ']'; | |
1289 | } | |
1290 | ||
1291 | /* Now add the filename. */ | |
1292 | ||
1293 | while (*unixname) | |
1294 | *local_ptr++ = *unixname++; | |
1295 | *local_ptr = 0; | |
1296 | ||
1297 | /* Now append it to the original VMS spec. */ | |
1298 | ||
1299 | strcpy ((must_revert==1)?fullname:basename, Local); | |
1300 | ||
1301 | /* If we put a [000000] in the filename, try to open it first. If this fails, | |
1302 | remove the [000000], and return that name. This provides flexibility | |
1303 | to the user in that they can use both rooted and non-rooted logical names | |
1304 | to point to the location of the file. */ | |
1305 | ||
1306 | if (check_filename_before_returning) | |
1307 | { | |
e576beb0 | 1308 | f = open (fullname, O_RDONLY|O_NONBLOCK); |
add7091b ZW |
1309 | if (f >= 0) |
1310 | { | |
1311 | /* The file name is OK as it is, so return it as is. */ | |
1312 | close (f); | |
1313 | return 1; | |
1314 | } | |
1315 | ||
1316 | /* The filename did not work. Try to remove the [000000] from the name, | |
1317 | and return it. */ | |
1318 | ||
7ceb3598 NB |
1319 | basename = strchr (fullname, '['); |
1320 | local_ptr = strchr (fullname, ']') + 1; | |
add7091b ZW |
1321 | strcpy (basename, local_ptr); /* this gets rid of it */ |
1322 | ||
1323 | } | |
1324 | ||
1325 | return 1; | |
1326 | } | |
1327 | #endif /* VMS */ |