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1 | /* Character scanner. | |
2 | Copyright (C) 2000-2020 Free Software Foundation, Inc. | |
3 | Contributed by Andy Vaught | |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING3. If not see | |
19 | <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | /* Set of subroutines to (ultimately) return the next character to the | |
22 | various matching subroutines. This file's job is to read files and | |
23 | build up lines that are parsed by the parser. This means that we | |
24 | handle continuation lines and "include" lines. | |
25 | ||
26 | The first thing the scanner does is to load an entire file into | |
27 | memory. We load the entire file into memory for a couple reasons. | |
28 | The first is that we want to be able to deal with nonseekable input | |
29 | (pipes, stdin) and there is a lot of backing up involved during | |
30 | parsing. | |
31 | ||
32 | The second is that we want to be able to print the locus of errors, | |
33 | and an error on line 999999 could conflict with something on line | |
34 | one. Given nonseekable input, we've got to store the whole thing. | |
35 | ||
36 | One thing that helps are the column truncation limits that give us | |
37 | an upper bound on the size of individual lines. We don't store the | |
38 | truncated stuff. | |
39 | ||
40 | From the scanner's viewpoint, the higher level subroutines ask for | |
41 | new characters and do a lot of jumping backwards. */ | |
42 | ||
43 | #include "config.h" | |
44 | #include "system.h" | |
45 | #include "coretypes.h" | |
46 | #include "gfortran.h" | |
47 | #include "toplev.h" /* For set_src_pwd. */ | |
48 | #include "debug.h" | |
49 | #include "options.h" | |
50 | #include "cpp.h" | |
51 | #include "scanner.h" | |
52 | ||
53 | /* List of include file search directories. */ | |
54 | gfc_directorylist *include_dirs, *intrinsic_modules_dirs; | |
55 | ||
56 | static gfc_file *file_head, *current_file; | |
57 | ||
58 | static int continue_flag, end_flag, gcc_attribute_flag; | |
59 | /* If !$omp/!$acc occurred in current comment line. */ | |
60 | static int openmp_flag, openacc_flag; | |
61 | static int continue_count, continue_line; | |
62 | static locus openmp_locus; | |
63 | static locus openacc_locus; | |
64 | static locus gcc_attribute_locus; | |
65 | ||
66 | gfc_source_form gfc_current_form; | |
67 | static gfc_linebuf *line_head, *line_tail; | |
68 | ||
69 | locus gfc_current_locus; | |
70 | const char *gfc_source_file; | |
71 | static FILE *gfc_src_file; | |
72 | static gfc_char_t *gfc_src_preprocessor_lines[2]; | |
73 | ||
74 | static struct gfc_file_change | |
75 | { | |
76 | const char *filename; | |
77 | gfc_linebuf *lb; | |
78 | int line; | |
79 | } *file_changes; | |
80 | size_t file_changes_cur, file_changes_count; | |
81 | size_t file_changes_allocated; | |
82 | ||
83 | static gfc_char_t *last_error_char; | |
84 | ||
85 | /* Functions dealing with our wide characters (gfc_char_t) and | |
86 | sequences of such characters. */ | |
87 | ||
88 | int | |
89 | gfc_wide_fits_in_byte (gfc_char_t c) | |
90 | { | |
91 | return (c <= UCHAR_MAX); | |
92 | } | |
93 | ||
94 | static inline int | |
95 | wide_is_ascii (gfc_char_t c) | |
96 | { | |
97 | return (gfc_wide_fits_in_byte (c) && ((unsigned char) c & ~0x7f) == 0); | |
98 | } | |
99 | ||
100 | int | |
101 | gfc_wide_is_printable (gfc_char_t c) | |
102 | { | |
103 | return (gfc_wide_fits_in_byte (c) && ISPRINT ((unsigned char) c)); | |
104 | } | |
105 | ||
106 | gfc_char_t | |
107 | gfc_wide_tolower (gfc_char_t c) | |
108 | { | |
109 | return (wide_is_ascii (c) ? (gfc_char_t) TOLOWER((unsigned char) c) : c); | |
110 | } | |
111 | ||
112 | gfc_char_t | |
113 | gfc_wide_toupper (gfc_char_t c) | |
114 | { | |
115 | return (wide_is_ascii (c) ? (gfc_char_t) TOUPPER((unsigned char) c) : c); | |
116 | } | |
117 | ||
118 | int | |
119 | gfc_wide_is_digit (gfc_char_t c) | |
120 | { | |
121 | return (c >= '0' && c <= '9'); | |
122 | } | |
123 | ||
124 | static inline int | |
125 | wide_atoi (gfc_char_t *c) | |
126 | { | |
127 | #define MAX_DIGITS 20 | |
128 | char buf[MAX_DIGITS+1]; | |
129 | int i = 0; | |
130 | ||
131 | while (gfc_wide_is_digit(*c) && i < MAX_DIGITS) | |
132 | buf[i++] = *c++; | |
133 | buf[i] = '\0'; | |
134 | return atoi (buf); | |
135 | } | |
136 | ||
137 | size_t | |
138 | gfc_wide_strlen (const gfc_char_t *str) | |
139 | { | |
140 | size_t i; | |
141 | ||
142 | for (i = 0; str[i]; i++) | |
143 | ; | |
144 | ||
145 | return i; | |
146 | } | |
147 | ||
148 | gfc_char_t * | |
149 | gfc_wide_memset (gfc_char_t *b, gfc_char_t c, size_t len) | |
150 | { | |
151 | size_t i; | |
152 | ||
153 | for (i = 0; i < len; i++) | |
154 | b[i] = c; | |
155 | ||
156 | return b; | |
157 | } | |
158 | ||
159 | static gfc_char_t * | |
160 | wide_strcpy (gfc_char_t *dest, const gfc_char_t *src) | |
161 | { | |
162 | gfc_char_t *d; | |
163 | ||
164 | for (d = dest; (*d = *src) != '\0'; ++src, ++d) | |
165 | ; | |
166 | ||
167 | return dest; | |
168 | } | |
169 | ||
170 | static gfc_char_t * | |
171 | wide_strchr (const gfc_char_t *s, gfc_char_t c) | |
172 | { | |
173 | do { | |
174 | if (*s == c) | |
175 | { | |
176 | return CONST_CAST(gfc_char_t *, s); | |
177 | } | |
178 | } while (*s++); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | char * | |
183 | gfc_widechar_to_char (const gfc_char_t *s, int length) | |
184 | { | |
185 | size_t len, i; | |
186 | char *res; | |
187 | ||
188 | if (s == NULL) | |
189 | return NULL; | |
190 | ||
191 | /* Passing a negative length is used to indicate that length should be | |
192 | calculated using gfc_wide_strlen(). */ | |
193 | len = (length >= 0 ? (size_t) length : gfc_wide_strlen (s)); | |
194 | res = XNEWVEC (char, len + 1); | |
195 | ||
196 | for (i = 0; i < len; i++) | |
197 | { | |
198 | gcc_assert (gfc_wide_fits_in_byte (s[i])); | |
199 | res[i] = (unsigned char) s[i]; | |
200 | } | |
201 | ||
202 | res[len] = '\0'; | |
203 | return res; | |
204 | } | |
205 | ||
206 | gfc_char_t * | |
207 | gfc_char_to_widechar (const char *s) | |
208 | { | |
209 | size_t len, i; | |
210 | gfc_char_t *res; | |
211 | ||
212 | if (s == NULL) | |
213 | return NULL; | |
214 | ||
215 | len = strlen (s); | |
216 | res = gfc_get_wide_string (len + 1); | |
217 | ||
218 | for (i = 0; i < len; i++) | |
219 | res[i] = (unsigned char) s[i]; | |
220 | ||
221 | res[len] = '\0'; | |
222 | return res; | |
223 | } | |
224 | ||
225 | static int | |
226 | wide_strncmp (const gfc_char_t *s1, const char *s2, size_t n) | |
227 | { | |
228 | gfc_char_t c1, c2; | |
229 | ||
230 | while (n-- > 0) | |
231 | { | |
232 | c1 = *s1++; | |
233 | c2 = *s2++; | |
234 | if (c1 != c2) | |
235 | return (c1 > c2 ? 1 : -1); | |
236 | if (c1 == '\0') | |
237 | return 0; | |
238 | } | |
239 | return 0; | |
240 | } | |
241 | ||
242 | int | |
243 | gfc_wide_strncasecmp (const gfc_char_t *s1, const char *s2, size_t n) | |
244 | { | |
245 | gfc_char_t c1, c2; | |
246 | ||
247 | while (n-- > 0) | |
248 | { | |
249 | c1 = gfc_wide_tolower (*s1++); | |
250 | c2 = TOLOWER (*s2++); | |
251 | if (c1 != c2) | |
252 | return (c1 > c2 ? 1 : -1); | |
253 | if (c1 == '\0') | |
254 | return 0; | |
255 | } | |
256 | return 0; | |
257 | } | |
258 | ||
259 | ||
260 | /* Main scanner initialization. */ | |
261 | ||
262 | void | |
263 | gfc_scanner_init_1 (void) | |
264 | { | |
265 | file_head = NULL; | |
266 | line_head = NULL; | |
267 | line_tail = NULL; | |
268 | ||
269 | continue_count = 0; | |
270 | continue_line = 0; | |
271 | ||
272 | end_flag = 0; | |
273 | last_error_char = NULL; | |
274 | } | |
275 | ||
276 | ||
277 | /* Main scanner destructor. */ | |
278 | ||
279 | void | |
280 | gfc_scanner_done_1 (void) | |
281 | { | |
282 | gfc_linebuf *lb; | |
283 | gfc_file *f; | |
284 | ||
285 | while(line_head != NULL) | |
286 | { | |
287 | lb = line_head->next; | |
288 | free (line_head); | |
289 | line_head = lb; | |
290 | } | |
291 | ||
292 | while(file_head != NULL) | |
293 | { | |
294 | f = file_head->next; | |
295 | free (file_head->filename); | |
296 | free (file_head); | |
297 | file_head = f; | |
298 | } | |
299 | } | |
300 | ||
301 | ||
302 | /* Adds path to the list pointed to by list. */ | |
303 | ||
304 | static void | |
305 | add_path_to_list (gfc_directorylist **list, const char *path, | |
306 | bool use_for_modules, bool head, bool warn) | |
307 | { | |
308 | gfc_directorylist *dir; | |
309 | const char *p; | |
310 | char *q; | |
311 | struct stat st; | |
312 | size_t len; | |
313 | int i; | |
314 | ||
315 | p = path; | |
316 | while (*p == ' ' || *p == '\t') /* someone might do "-I include" */ | |
317 | if (*p++ == '\0') | |
318 | return; | |
319 | ||
320 | /* Strip trailing directory separators from the path, as this | |
321 | will confuse Windows systems. */ | |
322 | len = strlen (p); | |
323 | q = (char *) alloca (len + 1); | |
324 | memcpy (q, p, len + 1); | |
325 | i = len - 1; | |
326 | while (i >=0 && IS_DIR_SEPARATOR (q[i])) | |
327 | q[i--] = '\0'; | |
328 | ||
329 | if (stat (q, &st)) | |
330 | { | |
331 | if (errno != ENOENT) | |
332 | gfc_warning_now (0, "Include directory %qs: %s", path, | |
333 | xstrerror(errno)); | |
334 | else if (warn) | |
335 | gfc_warning_now (OPT_Wmissing_include_dirs, | |
336 | "Nonexistent include directory %qs", path); | |
337 | return; | |
338 | } | |
339 | else if (!S_ISDIR (st.st_mode)) | |
340 | { | |
341 | gfc_fatal_error ("%qs is not a directory", path); | |
342 | return; | |
343 | } | |
344 | ||
345 | if (head || *list == NULL) | |
346 | { | |
347 | dir = XCNEW (gfc_directorylist); | |
348 | if (!head) | |
349 | *list = dir; | |
350 | } | |
351 | else | |
352 | { | |
353 | dir = *list; | |
354 | while (dir->next) | |
355 | dir = dir->next; | |
356 | ||
357 | dir->next = XCNEW (gfc_directorylist); | |
358 | dir = dir->next; | |
359 | } | |
360 | ||
361 | dir->next = head ? *list : NULL; | |
362 | if (head) | |
363 | *list = dir; | |
364 | dir->use_for_modules = use_for_modules; | |
365 | dir->path = XCNEWVEC (char, strlen (p) + 2); | |
366 | strcpy (dir->path, p); | |
367 | strcat (dir->path, "/"); /* make '/' last character */ | |
368 | } | |
369 | ||
370 | ||
371 | void | |
372 | gfc_add_include_path (const char *path, bool use_for_modules, bool file_dir, | |
373 | bool warn) | |
374 | { | |
375 | add_path_to_list (&include_dirs, path, use_for_modules, file_dir, warn); | |
376 | ||
377 | /* For '#include "..."' these directories are automatically searched. */ | |
378 | if (!file_dir) | |
379 | gfc_cpp_add_include_path (xstrdup(path), true); | |
380 | } | |
381 | ||
382 | ||
383 | void | |
384 | gfc_add_intrinsic_modules_path (const char *path) | |
385 | { | |
386 | add_path_to_list (&intrinsic_modules_dirs, path, true, false, false); | |
387 | } | |
388 | ||
389 | ||
390 | /* Release resources allocated for options. */ | |
391 | ||
392 | void | |
393 | gfc_release_include_path (void) | |
394 | { | |
395 | gfc_directorylist *p; | |
396 | ||
397 | while (include_dirs != NULL) | |
398 | { | |
399 | p = include_dirs; | |
400 | include_dirs = include_dirs->next; | |
401 | free (p->path); | |
402 | free (p); | |
403 | } | |
404 | ||
405 | while (intrinsic_modules_dirs != NULL) | |
406 | { | |
407 | p = intrinsic_modules_dirs; | |
408 | intrinsic_modules_dirs = intrinsic_modules_dirs->next; | |
409 | free (p->path); | |
410 | free (p); | |
411 | } | |
412 | ||
413 | free (gfc_option.module_dir); | |
414 | } | |
415 | ||
416 | ||
417 | static FILE * | |
418 | open_included_file (const char *name, gfc_directorylist *list, | |
419 | bool module, bool system) | |
420 | { | |
421 | char *fullname; | |
422 | gfc_directorylist *p; | |
423 | FILE *f; | |
424 | ||
425 | for (p = list; p; p = p->next) | |
426 | { | |
427 | if (module && !p->use_for_modules) | |
428 | continue; | |
429 | ||
430 | fullname = (char *) alloca(strlen (p->path) + strlen (name) + 1); | |
431 | strcpy (fullname, p->path); | |
432 | strcat (fullname, name); | |
433 | ||
434 | f = gfc_open_file (fullname); | |
435 | if (f != NULL) | |
436 | { | |
437 | if (gfc_cpp_makedep ()) | |
438 | gfc_cpp_add_dep (fullname, system); | |
439 | ||
440 | return f; | |
441 | } | |
442 | } | |
443 | ||
444 | return NULL; | |
445 | } | |
446 | ||
447 | ||
448 | /* Opens file for reading, searching through the include directories | |
449 | given if necessary. If the include_cwd argument is true, we try | |
450 | to open the file in the current directory first. */ | |
451 | ||
452 | FILE * | |
453 | gfc_open_included_file (const char *name, bool include_cwd, bool module) | |
454 | { | |
455 | FILE *f = NULL; | |
456 | ||
457 | if (IS_ABSOLUTE_PATH (name) || include_cwd) | |
458 | { | |
459 | f = gfc_open_file (name); | |
460 | if (f && gfc_cpp_makedep ()) | |
461 | gfc_cpp_add_dep (name, false); | |
462 | } | |
463 | ||
464 | if (!f) | |
465 | f = open_included_file (name, include_dirs, module, false); | |
466 | ||
467 | return f; | |
468 | } | |
469 | ||
470 | ||
471 | /* Test to see if we're at the end of the main source file. */ | |
472 | ||
473 | int | |
474 | gfc_at_end (void) | |
475 | { | |
476 | return end_flag; | |
477 | } | |
478 | ||
479 | ||
480 | /* Test to see if we're at the end of the current file. */ | |
481 | ||
482 | int | |
483 | gfc_at_eof (void) | |
484 | { | |
485 | if (gfc_at_end ()) | |
486 | return 1; | |
487 | ||
488 | if (line_head == NULL) | |
489 | return 1; /* Null file */ | |
490 | ||
491 | if (gfc_current_locus.lb == NULL) | |
492 | return 1; | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | ||
498 | /* Test to see if we're at the beginning of a new line. */ | |
499 | ||
500 | int | |
501 | gfc_at_bol (void) | |
502 | { | |
503 | if (gfc_at_eof ()) | |
504 | return 1; | |
505 | ||
506 | return (gfc_current_locus.nextc == gfc_current_locus.lb->line); | |
507 | } | |
508 | ||
509 | ||
510 | /* Test to see if we're at the end of a line. */ | |
511 | ||
512 | int | |
513 | gfc_at_eol (void) | |
514 | { | |
515 | if (gfc_at_eof ()) | |
516 | return 1; | |
517 | ||
518 | return (*gfc_current_locus.nextc == '\0'); | |
519 | } | |
520 | ||
521 | static void | |
522 | add_file_change (const char *filename, int line) | |
523 | { | |
524 | if (file_changes_count == file_changes_allocated) | |
525 | { | |
526 | if (file_changes_allocated) | |
527 | file_changes_allocated *= 2; | |
528 | else | |
529 | file_changes_allocated = 16; | |
530 | file_changes = XRESIZEVEC (struct gfc_file_change, file_changes, | |
531 | file_changes_allocated); | |
532 | } | |
533 | file_changes[file_changes_count].filename = filename; | |
534 | file_changes[file_changes_count].lb = NULL; | |
535 | file_changes[file_changes_count++].line = line; | |
536 | } | |
537 | ||
538 | static void | |
539 | report_file_change (gfc_linebuf *lb) | |
540 | { | |
541 | size_t c = file_changes_cur; | |
542 | while (c < file_changes_count | |
543 | && file_changes[c].lb == lb) | |
544 | { | |
545 | if (file_changes[c].filename) | |
546 | (*debug_hooks->start_source_file) (file_changes[c].line, | |
547 | file_changes[c].filename); | |
548 | else | |
549 | (*debug_hooks->end_source_file) (file_changes[c].line); | |
550 | ++c; | |
551 | } | |
552 | file_changes_cur = c; | |
553 | } | |
554 | ||
555 | void | |
556 | gfc_start_source_files (void) | |
557 | { | |
558 | /* If the debugger wants the name of the main source file, | |
559 | we give it. */ | |
560 | if (debug_hooks->start_end_main_source_file) | |
561 | (*debug_hooks->start_source_file) (0, gfc_source_file); | |
562 | ||
563 | file_changes_cur = 0; | |
564 | report_file_change (gfc_current_locus.lb); | |
565 | } | |
566 | ||
567 | void | |
568 | gfc_end_source_files (void) | |
569 | { | |
570 | report_file_change (NULL); | |
571 | ||
572 | if (debug_hooks->start_end_main_source_file) | |
573 | (*debug_hooks->end_source_file) (0); | |
574 | } | |
575 | ||
576 | /* Advance the current line pointer to the next line. */ | |
577 | ||
578 | void | |
579 | gfc_advance_line (void) | |
580 | { | |
581 | if (gfc_at_end ()) | |
582 | return; | |
583 | ||
584 | if (gfc_current_locus.lb == NULL) | |
585 | { | |
586 | end_flag = 1; | |
587 | return; | |
588 | } | |
589 | ||
590 | if (gfc_current_locus.lb->next | |
591 | && !gfc_current_locus.lb->next->dbg_emitted) | |
592 | { | |
593 | report_file_change (gfc_current_locus.lb->next); | |
594 | gfc_current_locus.lb->next->dbg_emitted = true; | |
595 | } | |
596 | ||
597 | gfc_current_locus.lb = gfc_current_locus.lb->next; | |
598 | ||
599 | if (gfc_current_locus.lb != NULL) | |
600 | gfc_current_locus.nextc = gfc_current_locus.lb->line; | |
601 | else | |
602 | { | |
603 | gfc_current_locus.nextc = NULL; | |
604 | end_flag = 1; | |
605 | } | |
606 | } | |
607 | ||
608 | ||
609 | /* Get the next character from the input, advancing gfc_current_file's | |
610 | locus. When we hit the end of the line or the end of the file, we | |
611 | start returning a '\n' in order to complete the current statement. | |
612 | No Fortran line conventions are implemented here. | |
613 | ||
614 | Requiring explicit advances to the next line prevents the parse | |
615 | pointer from being on the wrong line if the current statement ends | |
616 | prematurely. */ | |
617 | ||
618 | static gfc_char_t | |
619 | next_char (void) | |
620 | { | |
621 | gfc_char_t c; | |
622 | ||
623 | if (gfc_current_locus.nextc == NULL) | |
624 | return '\n'; | |
625 | ||
626 | c = *gfc_current_locus.nextc++; | |
627 | if (c == '\0') | |
628 | { | |
629 | gfc_current_locus.nextc--; /* Remain on this line. */ | |
630 | c = '\n'; | |
631 | } | |
632 | ||
633 | return c; | |
634 | } | |
635 | ||
636 | ||
637 | /* Skip a comment. When we come here the parse pointer is positioned | |
638 | immediately after the comment character. If we ever implement | |
639 | compiler directives within comments, here is where we parse the | |
640 | directive. */ | |
641 | ||
642 | static void | |
643 | skip_comment_line (void) | |
644 | { | |
645 | gfc_char_t c; | |
646 | ||
647 | do | |
648 | { | |
649 | c = next_char (); | |
650 | } | |
651 | while (c != '\n'); | |
652 | ||
653 | gfc_advance_line (); | |
654 | } | |
655 | ||
656 | ||
657 | int | |
658 | gfc_define_undef_line (void) | |
659 | { | |
660 | char *tmp; | |
661 | ||
662 | /* All lines beginning with '#' are either #define or #undef. */ | |
663 | if (debug_info_level != DINFO_LEVEL_VERBOSE || gfc_peek_ascii_char () != '#') | |
664 | return 0; | |
665 | ||
666 | if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0) | |
667 | { | |
668 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1); | |
669 | (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb), | |
670 | tmp); | |
671 | free (tmp); | |
672 | } | |
673 | ||
674 | if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0) | |
675 | { | |
676 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1); | |
677 | (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb), | |
678 | tmp); | |
679 | free (tmp); | |
680 | } | |
681 | ||
682 | /* Skip the rest of the line. */ | |
683 | skip_comment_line (); | |
684 | ||
685 | return 1; | |
686 | } | |
687 | ||
688 | ||
689 | /* Return true if GCC$ was matched. */ | |
690 | static bool | |
691 | skip_gcc_attribute (locus start) | |
692 | { | |
693 | bool r = false; | |
694 | char c; | |
695 | locus old_loc = gfc_current_locus; | |
696 | ||
697 | if ((c = next_char ()) == 'g' || c == 'G') | |
698 | if ((c = next_char ()) == 'c' || c == 'C') | |
699 | if ((c = next_char ()) == 'c' || c == 'C') | |
700 | if ((c = next_char ()) == '$') | |
701 | r = true; | |
702 | ||
703 | if (r == false) | |
704 | gfc_current_locus = old_loc; | |
705 | else | |
706 | { | |
707 | gcc_attribute_flag = 1; | |
708 | gcc_attribute_locus = old_loc; | |
709 | gfc_current_locus = start; | |
710 | } | |
711 | ||
712 | return r; | |
713 | } | |
714 | ||
715 | /* Return true if CC was matched. */ | |
716 | static bool | |
717 | skip_free_oacc_sentinel (locus start, locus old_loc) | |
718 | { | |
719 | bool r = false; | |
720 | char c; | |
721 | ||
722 | if ((c = next_char ()) == 'c' || c == 'C') | |
723 | if ((c = next_char ()) == 'c' || c == 'C') | |
724 | r = true; | |
725 | ||
726 | if (r) | |
727 | { | |
728 | if ((c = next_char ()) == ' ' || c == '\t' | |
729 | || continue_flag) | |
730 | { | |
731 | while (gfc_is_whitespace (c)) | |
732 | c = next_char (); | |
733 | if (c != '\n' && c != '!') | |
734 | { | |
735 | openacc_flag = 1; | |
736 | openacc_locus = old_loc; | |
737 | gfc_current_locus = start; | |
738 | } | |
739 | else | |
740 | r = false; | |
741 | } | |
742 | else | |
743 | { | |
744 | gfc_warning_now (0, "!$ACC at %C starts a commented " | |
745 | "line as it neither is followed " | |
746 | "by a space nor is a " | |
747 | "continuation line"); | |
748 | r = false; | |
749 | } | |
750 | } | |
751 | ||
752 | return r; | |
753 | } | |
754 | ||
755 | /* Return true if MP was matched. */ | |
756 | static bool | |
757 | skip_free_omp_sentinel (locus start, locus old_loc) | |
758 | { | |
759 | bool r = false; | |
760 | char c; | |
761 | ||
762 | if ((c = next_char ()) == 'm' || c == 'M') | |
763 | if ((c = next_char ()) == 'p' || c == 'P') | |
764 | r = true; | |
765 | ||
766 | if (r) | |
767 | { | |
768 | if ((c = next_char ()) == ' ' || c == '\t' | |
769 | || continue_flag) | |
770 | { | |
771 | while (gfc_is_whitespace (c)) | |
772 | c = next_char (); | |
773 | if (c != '\n' && c != '!') | |
774 | { | |
775 | openmp_flag = 1; | |
776 | openmp_locus = old_loc; | |
777 | gfc_current_locus = start; | |
778 | } | |
779 | else | |
780 | r = false; | |
781 | } | |
782 | else | |
783 | { | |
784 | gfc_warning_now (0, "!$OMP at %C starts a commented " | |
785 | "line as it neither is followed " | |
786 | "by a space nor is a " | |
787 | "continuation line"); | |
788 | r = false; | |
789 | } | |
790 | } | |
791 | ||
792 | return r; | |
793 | } | |
794 | ||
795 | /* Comment lines are null lines, lines containing only blanks or lines | |
796 | on which the first nonblank line is a '!'. | |
797 | Return true if !$ openmp or openacc conditional compilation sentinel was | |
798 | seen. */ | |
799 | ||
800 | static bool | |
801 | skip_free_comments (void) | |
802 | { | |
803 | locus start; | |
804 | gfc_char_t c; | |
805 | int at_bol; | |
806 | ||
807 | for (;;) | |
808 | { | |
809 | at_bol = gfc_at_bol (); | |
810 | start = gfc_current_locus; | |
811 | if (gfc_at_eof ()) | |
812 | break; | |
813 | ||
814 | do | |
815 | c = next_char (); | |
816 | while (gfc_is_whitespace (c)); | |
817 | ||
818 | if (c == '\n') | |
819 | { | |
820 | gfc_advance_line (); | |
821 | continue; | |
822 | } | |
823 | ||
824 | if (c == '!') | |
825 | { | |
826 | /* Keep the !GCC$ line. */ | |
827 | if (at_bol && skip_gcc_attribute (start)) | |
828 | return false; | |
829 | ||
830 | /* If -fopenmp/-fopenacc, we need to handle here 2 things: | |
831 | 1) don't treat !$omp/!$acc as comments, but directives | |
832 | 2) handle OpenMP/OpenACC conditional compilation, where | |
833 | !$ should be treated as 2 spaces (for initial lines | |
834 | only if followed by space). */ | |
835 | if (at_bol) | |
836 | { | |
837 | if ((flag_openmp || flag_openmp_simd) | |
838 | && flag_openacc) | |
839 | { | |
840 | locus old_loc = gfc_current_locus; | |
841 | if (next_char () == '$') | |
842 | { | |
843 | c = next_char (); | |
844 | if (c == 'o' || c == 'O') | |
845 | { | |
846 | if (skip_free_omp_sentinel (start, old_loc)) | |
847 | return false; | |
848 | gfc_current_locus = old_loc; | |
849 | next_char (); | |
850 | c = next_char (); | |
851 | } | |
852 | else if (c == 'a' || c == 'A') | |
853 | { | |
854 | if (skip_free_oacc_sentinel (start, old_loc)) | |
855 | return false; | |
856 | gfc_current_locus = old_loc; | |
857 | next_char (); | |
858 | c = next_char (); | |
859 | } | |
860 | if (continue_flag || c == ' ' || c == '\t') | |
861 | { | |
862 | gfc_current_locus = old_loc; | |
863 | next_char (); | |
864 | openmp_flag = openacc_flag = 0; | |
865 | return true; | |
866 | } | |
867 | } | |
868 | gfc_current_locus = old_loc; | |
869 | } | |
870 | else if ((flag_openmp || flag_openmp_simd) | |
871 | && !flag_openacc) | |
872 | { | |
873 | locus old_loc = gfc_current_locus; | |
874 | if (next_char () == '$') | |
875 | { | |
876 | c = next_char (); | |
877 | if (c == 'o' || c == 'O') | |
878 | { | |
879 | if (skip_free_omp_sentinel (start, old_loc)) | |
880 | return false; | |
881 | gfc_current_locus = old_loc; | |
882 | next_char (); | |
883 | c = next_char (); | |
884 | } | |
885 | if (continue_flag || c == ' ' || c == '\t') | |
886 | { | |
887 | gfc_current_locus = old_loc; | |
888 | next_char (); | |
889 | openmp_flag = 0; | |
890 | return true; | |
891 | } | |
892 | } | |
893 | gfc_current_locus = old_loc; | |
894 | } | |
895 | else if (flag_openacc | |
896 | && !(flag_openmp || flag_openmp_simd)) | |
897 | { | |
898 | locus old_loc = gfc_current_locus; | |
899 | if (next_char () == '$') | |
900 | { | |
901 | c = next_char (); | |
902 | if (c == 'a' || c == 'A') | |
903 | { | |
904 | if (skip_free_oacc_sentinel (start, old_loc)) | |
905 | return false; | |
906 | gfc_current_locus = old_loc; | |
907 | next_char(); | |
908 | c = next_char(); | |
909 | } | |
910 | if (continue_flag || c == ' ' || c == '\t') | |
911 | { | |
912 | gfc_current_locus = old_loc; | |
913 | next_char(); | |
914 | openacc_flag = 0; | |
915 | return true; | |
916 | } | |
917 | } | |
918 | gfc_current_locus = old_loc; | |
919 | } | |
920 | } | |
921 | skip_comment_line (); | |
922 | continue; | |
923 | } | |
924 | ||
925 | break; | |
926 | } | |
927 | ||
928 | if (openmp_flag && at_bol) | |
929 | openmp_flag = 0; | |
930 | ||
931 | if (openacc_flag && at_bol) | |
932 | openacc_flag = 0; | |
933 | ||
934 | gcc_attribute_flag = 0; | |
935 | gfc_current_locus = start; | |
936 | return false; | |
937 | } | |
938 | ||
939 | /* Return true if MP was matched in fixed form. */ | |
940 | static bool | |
941 | skip_fixed_omp_sentinel (locus *start) | |
942 | { | |
943 | gfc_char_t c; | |
944 | if (((c = next_char ()) == 'm' || c == 'M') | |
945 | && ((c = next_char ()) == 'p' || c == 'P')) | |
946 | { | |
947 | c = next_char (); | |
948 | if (c != '\n' | |
949 | && (continue_flag | |
950 | || c == ' ' || c == '\t' || c == '0')) | |
951 | { | |
952 | do | |
953 | c = next_char (); | |
954 | while (gfc_is_whitespace (c)); | |
955 | if (c != '\n' && c != '!') | |
956 | { | |
957 | /* Canonicalize to *$omp. */ | |
958 | *start->nextc = '*'; | |
959 | openmp_flag = 1; | |
960 | gfc_current_locus = *start; | |
961 | return true; | |
962 | } | |
963 | } | |
964 | } | |
965 | return false; | |
966 | } | |
967 | ||
968 | /* Return true if CC was matched in fixed form. */ | |
969 | static bool | |
970 | skip_fixed_oacc_sentinel (locus *start) | |
971 | { | |
972 | gfc_char_t c; | |
973 | if (((c = next_char ()) == 'c' || c == 'C') | |
974 | && ((c = next_char ()) == 'c' || c == 'C')) | |
975 | { | |
976 | c = next_char (); | |
977 | if (c != '\n' | |
978 | && (continue_flag | |
979 | || c == ' ' || c == '\t' || c == '0')) | |
980 | { | |
981 | do | |
982 | c = next_char (); | |
983 | while (gfc_is_whitespace (c)); | |
984 | if (c != '\n' && c != '!') | |
985 | { | |
986 | /* Canonicalize to *$acc. */ | |
987 | *start->nextc = '*'; | |
988 | openacc_flag = 1; | |
989 | gfc_current_locus = *start; | |
990 | return true; | |
991 | } | |
992 | } | |
993 | } | |
994 | return false; | |
995 | } | |
996 | ||
997 | /* Skip comment lines in fixed source mode. We have the same rules as | |
998 | in skip_free_comment(), except that we can have a 'c', 'C' or '*' | |
999 | in column 1, and a '!' cannot be in column 6. Also, we deal with | |
1000 | lines with 'd' or 'D' in column 1, if the user requested this. */ | |
1001 | ||
1002 | static void | |
1003 | skip_fixed_comments (void) | |
1004 | { | |
1005 | locus start; | |
1006 | int col; | |
1007 | gfc_char_t c; | |
1008 | ||
1009 | if (! gfc_at_bol ()) | |
1010 | { | |
1011 | start = gfc_current_locus; | |
1012 | if (! gfc_at_eof ()) | |
1013 | { | |
1014 | do | |
1015 | c = next_char (); | |
1016 | while (gfc_is_whitespace (c)); | |
1017 | ||
1018 | if (c == '\n') | |
1019 | gfc_advance_line (); | |
1020 | else if (c == '!') | |
1021 | skip_comment_line (); | |
1022 | } | |
1023 | ||
1024 | if (! gfc_at_bol ()) | |
1025 | { | |
1026 | gfc_current_locus = start; | |
1027 | return; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | for (;;) | |
1032 | { | |
1033 | start = gfc_current_locus; | |
1034 | if (gfc_at_eof ()) | |
1035 | break; | |
1036 | ||
1037 | c = next_char (); | |
1038 | if (c == '\n') | |
1039 | { | |
1040 | gfc_advance_line (); | |
1041 | continue; | |
1042 | } | |
1043 | ||
1044 | if (c == '!' || c == 'c' || c == 'C' || c == '*') | |
1045 | { | |
1046 | if (skip_gcc_attribute (start)) | |
1047 | { | |
1048 | /* Canonicalize to *$omp. */ | |
1049 | *start.nextc = '*'; | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | if (gfc_current_locus.lb != NULL | |
1054 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1055 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1056 | ||
1057 | /* If -fopenmp/-fopenacc, we need to handle here 2 things: | |
1058 | 1) don't treat !$omp/!$acc|c$omp/c$acc|*$omp / *$acc as comments, | |
1059 | but directives | |
1060 | 2) handle OpenMP/OpenACC conditional compilation, where | |
1061 | !$|c$|*$ should be treated as 2 spaces if the characters | |
1062 | in columns 3 to 6 are valid fixed form label columns | |
1063 | characters. */ | |
1064 | if ((flag_openmp || flag_openmp_simd) && !flag_openacc) | |
1065 | { | |
1066 | if (next_char () == '$') | |
1067 | { | |
1068 | c = next_char (); | |
1069 | if (c == 'o' || c == 'O') | |
1070 | { | |
1071 | if (skip_fixed_omp_sentinel (&start)) | |
1072 | return; | |
1073 | } | |
1074 | else | |
1075 | goto check_for_digits; | |
1076 | } | |
1077 | gfc_current_locus = start; | |
1078 | } | |
1079 | ||
1080 | if (flag_openacc && !(flag_openmp || flag_openmp_simd)) | |
1081 | { | |
1082 | if (next_char () == '$') | |
1083 | { | |
1084 | c = next_char (); | |
1085 | if (c == 'a' || c == 'A') | |
1086 | { | |
1087 | if (skip_fixed_oacc_sentinel (&start)) | |
1088 | return; | |
1089 | } | |
1090 | else | |
1091 | goto check_for_digits; | |
1092 | } | |
1093 | gfc_current_locus = start; | |
1094 | } | |
1095 | ||
1096 | if (flag_openacc || flag_openmp || flag_openmp_simd) | |
1097 | { | |
1098 | if (next_char () == '$') | |
1099 | { | |
1100 | c = next_char (); | |
1101 | if (c == 'a' || c == 'A') | |
1102 | { | |
1103 | if (skip_fixed_oacc_sentinel (&start)) | |
1104 | return; | |
1105 | } | |
1106 | else if (c == 'o' || c == 'O') | |
1107 | { | |
1108 | if (skip_fixed_omp_sentinel (&start)) | |
1109 | return; | |
1110 | } | |
1111 | else | |
1112 | goto check_for_digits; | |
1113 | } | |
1114 | gfc_current_locus = start; | |
1115 | } | |
1116 | ||
1117 | skip_comment_line (); | |
1118 | continue; | |
1119 | ||
1120 | gcc_unreachable (); | |
1121 | check_for_digits: | |
1122 | { | |
1123 | int digit_seen = 0; | |
1124 | ||
1125 | for (col = 3; col < 6; col++, c = next_char ()) | |
1126 | if (c == ' ') | |
1127 | continue; | |
1128 | else if (c == '\t') | |
1129 | { | |
1130 | col = 6; | |
1131 | break; | |
1132 | } | |
1133 | else if (c < '0' || c > '9') | |
1134 | break; | |
1135 | else | |
1136 | digit_seen = 1; | |
1137 | ||
1138 | if (col == 6 && c != '\n' | |
1139 | && ((continue_flag && !digit_seen) | |
1140 | || c == ' ' || c == '\t' || c == '0')) | |
1141 | { | |
1142 | gfc_current_locus = start; | |
1143 | start.nextc[0] = ' '; | |
1144 | start.nextc[1] = ' '; | |
1145 | continue; | |
1146 | } | |
1147 | } | |
1148 | skip_comment_line (); | |
1149 | continue; | |
1150 | } | |
1151 | ||
1152 | if (gfc_option.flag_d_lines != -1 && (c == 'd' || c == 'D')) | |
1153 | { | |
1154 | if (gfc_option.flag_d_lines == 0) | |
1155 | { | |
1156 | skip_comment_line (); | |
1157 | continue; | |
1158 | } | |
1159 | else | |
1160 | *start.nextc = c = ' '; | |
1161 | } | |
1162 | ||
1163 | col = 1; | |
1164 | ||
1165 | while (gfc_is_whitespace (c)) | |
1166 | { | |
1167 | c = next_char (); | |
1168 | col++; | |
1169 | } | |
1170 | ||
1171 | if (c == '\n') | |
1172 | { | |
1173 | gfc_advance_line (); | |
1174 | continue; | |
1175 | } | |
1176 | ||
1177 | if (col != 6 && c == '!') | |
1178 | { | |
1179 | if (gfc_current_locus.lb != NULL | |
1180 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1181 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1182 | skip_comment_line (); | |
1183 | continue; | |
1184 | } | |
1185 | ||
1186 | break; | |
1187 | } | |
1188 | ||
1189 | openmp_flag = 0; | |
1190 | openacc_flag = 0; | |
1191 | gcc_attribute_flag = 0; | |
1192 | gfc_current_locus = start; | |
1193 | } | |
1194 | ||
1195 | ||
1196 | /* Skips the current line if it is a comment. */ | |
1197 | ||
1198 | void | |
1199 | gfc_skip_comments (void) | |
1200 | { | |
1201 | if (gfc_current_form == FORM_FREE) | |
1202 | skip_free_comments (); | |
1203 | else | |
1204 | skip_fixed_comments (); | |
1205 | } | |
1206 | ||
1207 | ||
1208 | /* Get the next character from the input, taking continuation lines | |
1209 | and end-of-line comments into account. This implies that comment | |
1210 | lines between continued lines must be eaten here. For higher-level | |
1211 | subroutines, this flattens continued lines into a single logical | |
1212 | line. The in_string flag denotes whether we're inside a character | |
1213 | context or not. */ | |
1214 | ||
1215 | gfc_char_t | |
1216 | gfc_next_char_literal (gfc_instring in_string) | |
1217 | { | |
1218 | locus old_loc; | |
1219 | int i, prev_openmp_flag, prev_openacc_flag; | |
1220 | gfc_char_t c; | |
1221 | ||
1222 | continue_flag = 0; | |
1223 | prev_openacc_flag = prev_openmp_flag = 0; | |
1224 | ||
1225 | restart: | |
1226 | c = next_char (); | |
1227 | if (gfc_at_end ()) | |
1228 | { | |
1229 | continue_count = 0; | |
1230 | return c; | |
1231 | } | |
1232 | ||
1233 | if (gfc_current_form == FORM_FREE) | |
1234 | { | |
1235 | bool openmp_cond_flag; | |
1236 | ||
1237 | if (!in_string && c == '!') | |
1238 | { | |
1239 | if (gcc_attribute_flag | |
1240 | && memcmp (&gfc_current_locus, &gcc_attribute_locus, | |
1241 | sizeof (gfc_current_locus)) == 0) | |
1242 | goto done; | |
1243 | ||
1244 | if (openmp_flag | |
1245 | && memcmp (&gfc_current_locus, &openmp_locus, | |
1246 | sizeof (gfc_current_locus)) == 0) | |
1247 | goto done; | |
1248 | ||
1249 | if (openacc_flag | |
1250 | && memcmp (&gfc_current_locus, &openacc_locus, | |
1251 | sizeof (gfc_current_locus)) == 0) | |
1252 | goto done; | |
1253 | ||
1254 | /* This line can't be continued */ | |
1255 | do | |
1256 | { | |
1257 | c = next_char (); | |
1258 | } | |
1259 | while (c != '\n'); | |
1260 | ||
1261 | /* Avoid truncation warnings for comment ending lines. */ | |
1262 | gfc_current_locus.lb->truncated = 0; | |
1263 | ||
1264 | goto done; | |
1265 | } | |
1266 | ||
1267 | /* Check to see if the continuation line was truncated. */ | |
1268 | if (warn_line_truncation && gfc_current_locus.lb != NULL | |
1269 | && gfc_current_locus.lb->truncated) | |
1270 | { | |
1271 | int maxlen = flag_free_line_length; | |
1272 | gfc_char_t *current_nextc = gfc_current_locus.nextc; | |
1273 | ||
1274 | gfc_current_locus.lb->truncated = 0; | |
1275 | gfc_current_locus.nextc = gfc_current_locus.lb->line + maxlen; | |
1276 | gfc_warning_now (OPT_Wline_truncation, | |
1277 | "Line truncated at %L", &gfc_current_locus); | |
1278 | gfc_current_locus.nextc = current_nextc; | |
1279 | } | |
1280 | ||
1281 | if (c != '&') | |
1282 | goto done; | |
1283 | ||
1284 | /* If the next nonblank character is a ! or \n, we've got a | |
1285 | continuation line. */ | |
1286 | old_loc = gfc_current_locus; | |
1287 | ||
1288 | c = next_char (); | |
1289 | while (gfc_is_whitespace (c)) | |
1290 | c = next_char (); | |
1291 | ||
1292 | /* Character constants to be continued cannot have commentary | |
1293 | after the '&'. However, there are cases where we may think we | |
1294 | are still in a string and we are looking for a possible | |
1295 | doubled quote and we end up here. See PR64506. */ | |
1296 | ||
1297 | if (in_string && c != '\n') | |
1298 | { | |
1299 | gfc_current_locus = old_loc; | |
1300 | c = '&'; | |
1301 | goto done; | |
1302 | } | |
1303 | ||
1304 | if (c != '!' && c != '\n') | |
1305 | { | |
1306 | gfc_current_locus = old_loc; | |
1307 | c = '&'; | |
1308 | goto done; | |
1309 | } | |
1310 | ||
1311 | if (flag_openmp) | |
1312 | prev_openmp_flag = openmp_flag; | |
1313 | if (flag_openacc) | |
1314 | prev_openacc_flag = openacc_flag; | |
1315 | ||
1316 | /* This can happen if the input file changed or via cpp's #line | |
1317 | without getting reset (e.g. via input_stmt). It also happens | |
1318 | when pre-including files via -fpre-include=. */ | |
1319 | if (continue_count == 0 | |
1320 | && gfc_current_locus.lb | |
1321 | && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb) + 1) | |
1322 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb) + 1; | |
1323 | ||
1324 | continue_flag = 1; | |
1325 | if (c == '!') | |
1326 | skip_comment_line (); | |
1327 | else | |
1328 | gfc_advance_line (); | |
1329 | ||
1330 | if (gfc_at_eof ()) | |
1331 | goto not_continuation; | |
1332 | ||
1333 | /* We've got a continuation line. If we are on the very next line after | |
1334 | the last continuation, increment the continuation line count and | |
1335 | check whether the limit has been exceeded. */ | |
1336 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) | |
1337 | { | |
1338 | if (++continue_count == gfc_option.max_continue_free) | |
1339 | { | |
1340 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) | |
1341 | gfc_warning (0, "Limit of %d continuations exceeded in " | |
1342 | "statement at %C", gfc_option.max_continue_free); | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | /* Now find where it continues. First eat any comment lines. */ | |
1347 | openmp_cond_flag = skip_free_comments (); | |
1348 | ||
1349 | if (gfc_current_locus.lb != NULL | |
1350 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1351 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1352 | ||
1353 | if (flag_openmp) | |
1354 | if (prev_openmp_flag != openmp_flag && !openacc_flag) | |
1355 | { | |
1356 | gfc_current_locus = old_loc; | |
1357 | openmp_flag = prev_openmp_flag; | |
1358 | c = '&'; | |
1359 | goto done; | |
1360 | } | |
1361 | ||
1362 | if (flag_openacc) | |
1363 | if (prev_openacc_flag != openacc_flag && !openmp_flag) | |
1364 | { | |
1365 | gfc_current_locus = old_loc; | |
1366 | openacc_flag = prev_openacc_flag; | |
1367 | c = '&'; | |
1368 | goto done; | |
1369 | } | |
1370 | ||
1371 | /* Now that we have a non-comment line, probe ahead for the | |
1372 | first non-whitespace character. If it is another '&', then | |
1373 | reading starts at the next character, otherwise we must back | |
1374 | up to where the whitespace started and resume from there. */ | |
1375 | ||
1376 | old_loc = gfc_current_locus; | |
1377 | ||
1378 | c = next_char (); | |
1379 | while (gfc_is_whitespace (c)) | |
1380 | c = next_char (); | |
1381 | ||
1382 | if (openmp_flag && !openacc_flag) | |
1383 | { | |
1384 | for (i = 0; i < 5; i++, c = next_char ()) | |
1385 | { | |
1386 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$omp"[i]); | |
1387 | if (i == 4) | |
1388 | old_loc = gfc_current_locus; | |
1389 | } | |
1390 | while (gfc_is_whitespace (c)) | |
1391 | c = next_char (); | |
1392 | } | |
1393 | if (openacc_flag && !openmp_flag) | |
1394 | { | |
1395 | for (i = 0; i < 5; i++, c = next_char ()) | |
1396 | { | |
1397 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$acc"[i]); | |
1398 | if (i == 4) | |
1399 | old_loc = gfc_current_locus; | |
1400 | } | |
1401 | while (gfc_is_whitespace (c)) | |
1402 | c = next_char (); | |
1403 | } | |
1404 | ||
1405 | /* In case we have an OpenMP directive continued by OpenACC | |
1406 | sentinel, or vice versa, we get both openmp_flag and | |
1407 | openacc_flag on. */ | |
1408 | ||
1409 | if (openacc_flag && openmp_flag) | |
1410 | { | |
1411 | int is_openmp = 0; | |
1412 | for (i = 0; i < 5; i++, c = next_char ()) | |
1413 | { | |
1414 | if (gfc_wide_tolower (c) != (unsigned char) "!$acc"[i]) | |
1415 | is_openmp = 1; | |
1416 | if (i == 4) | |
1417 | old_loc = gfc_current_locus; | |
1418 | } | |
1419 | gfc_error (is_openmp | |
1420 | ? G_("Wrong OpenACC continuation at %C: " | |
1421 | "expected !$ACC, got !$OMP") | |
1422 | : G_("Wrong OpenMP continuation at %C: " | |
1423 | "expected !$OMP, got !$ACC")); | |
1424 | } | |
1425 | ||
1426 | if (c != '&') | |
1427 | { | |
1428 | if (in_string && gfc_current_locus.nextc) | |
1429 | { | |
1430 | gfc_current_locus.nextc--; | |
1431 | if (warn_ampersand && in_string == INSTRING_WARN) | |
1432 | gfc_warning (OPT_Wampersand, | |
1433 | "Missing %<&%> in continued character " | |
1434 | "constant at %C"); | |
1435 | } | |
1436 | else if (!in_string && (c == '\'' || c == '"')) | |
1437 | goto done; | |
1438 | /* Both !$omp and !$ -fopenmp continuation lines have & on the | |
1439 | continuation line only optionally. */ | |
1440 | else if (openmp_flag || openacc_flag || openmp_cond_flag) | |
1441 | { | |
1442 | if (gfc_current_locus.nextc) | |
1443 | gfc_current_locus.nextc--; | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | c = ' '; | |
1448 | gfc_current_locus = old_loc; | |
1449 | goto done; | |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | else /* Fixed form. */ | |
1454 | { | |
1455 | /* Fixed form continuation. */ | |
1456 | if (in_string != INSTRING_WARN && c == '!') | |
1457 | { | |
1458 | /* Skip comment at end of line. */ | |
1459 | do | |
1460 | { | |
1461 | c = next_char (); | |
1462 | } | |
1463 | while (c != '\n'); | |
1464 | ||
1465 | /* Avoid truncation warnings for comment ending lines. */ | |
1466 | gfc_current_locus.lb->truncated = 0; | |
1467 | } | |
1468 | ||
1469 | if (c != '\n') | |
1470 | goto done; | |
1471 | ||
1472 | /* Check to see if the continuation line was truncated. */ | |
1473 | if (warn_line_truncation && gfc_current_locus.lb != NULL | |
1474 | && gfc_current_locus.lb->truncated) | |
1475 | { | |
1476 | gfc_current_locus.lb->truncated = 0; | |
1477 | gfc_warning_now (OPT_Wline_truncation, | |
1478 | "Line truncated at %L", &gfc_current_locus); | |
1479 | } | |
1480 | ||
1481 | if (flag_openmp) | |
1482 | prev_openmp_flag = openmp_flag; | |
1483 | if (flag_openacc) | |
1484 | prev_openacc_flag = openacc_flag; | |
1485 | ||
1486 | /* This can happen if the input file changed or via cpp's #line | |
1487 | without getting reset (e.g. via input_stmt). It also happens | |
1488 | when pre-including files via -fpre-include=. */ | |
1489 | if (continue_count == 0 | |
1490 | && gfc_current_locus.lb | |
1491 | && continue_line > gfc_linebuf_linenum (gfc_current_locus.lb) + 1) | |
1492 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb) + 1; | |
1493 | ||
1494 | continue_flag = 1; | |
1495 | old_loc = gfc_current_locus; | |
1496 | ||
1497 | gfc_advance_line (); | |
1498 | skip_fixed_comments (); | |
1499 | ||
1500 | /* See if this line is a continuation line. */ | |
1501 | if (flag_openmp && openmp_flag != prev_openmp_flag && !openacc_flag) | |
1502 | { | |
1503 | openmp_flag = prev_openmp_flag; | |
1504 | goto not_continuation; | |
1505 | } | |
1506 | if (flag_openacc && openacc_flag != prev_openacc_flag && !openmp_flag) | |
1507 | { | |
1508 | openacc_flag = prev_openacc_flag; | |
1509 | goto not_continuation; | |
1510 | } | |
1511 | ||
1512 | /* In case we have an OpenMP directive continued by OpenACC | |
1513 | sentinel, or vice versa, we get both openmp_flag and | |
1514 | openacc_flag on. */ | |
1515 | if (openacc_flag && openmp_flag) | |
1516 | { | |
1517 | int is_openmp = 0; | |
1518 | for (i = 0; i < 5; i++) | |
1519 | { | |
1520 | c = next_char (); | |
1521 | if (gfc_wide_tolower (c) != (unsigned char) "*$acc"[i]) | |
1522 | is_openmp = 1; | |
1523 | } | |
1524 | gfc_error (is_openmp | |
1525 | ? G_("Wrong OpenACC continuation at %C: " | |
1526 | "expected !$ACC, got !$OMP") | |
1527 | : G_("Wrong OpenMP continuation at %C: " | |
1528 | "expected !$OMP, got !$ACC")); | |
1529 | } | |
1530 | else if (!openmp_flag && !openacc_flag) | |
1531 | for (i = 0; i < 5; i++) | |
1532 | { | |
1533 | c = next_char (); | |
1534 | if (c != ' ') | |
1535 | goto not_continuation; | |
1536 | } | |
1537 | else if (openmp_flag) | |
1538 | for (i = 0; i < 5; i++) | |
1539 | { | |
1540 | c = next_char (); | |
1541 | if (gfc_wide_tolower (c) != (unsigned char) "*$omp"[i]) | |
1542 | goto not_continuation; | |
1543 | } | |
1544 | else if (openacc_flag) | |
1545 | for (i = 0; i < 5; i++) | |
1546 | { | |
1547 | c = next_char (); | |
1548 | if (gfc_wide_tolower (c) != (unsigned char) "*$acc"[i]) | |
1549 | goto not_continuation; | |
1550 | } | |
1551 | ||
1552 | c = next_char (); | |
1553 | if (c == '0' || c == ' ' || c == '\n') | |
1554 | goto not_continuation; | |
1555 | ||
1556 | /* We've got a continuation line. If we are on the very next line after | |
1557 | the last continuation, increment the continuation line count and | |
1558 | check whether the limit has been exceeded. */ | |
1559 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) | |
1560 | { | |
1561 | if (++continue_count == gfc_option.max_continue_fixed) | |
1562 | { | |
1563 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) | |
1564 | gfc_warning (0, "Limit of %d continuations exceeded in " | |
1565 | "statement at %C", | |
1566 | gfc_option.max_continue_fixed); | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | if (gfc_current_locus.lb != NULL | |
1571 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1572 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1573 | } | |
1574 | ||
1575 | /* Ready to read first character of continuation line, which might | |
1576 | be another continuation line! */ | |
1577 | goto restart; | |
1578 | ||
1579 | not_continuation: | |
1580 | c = '\n'; | |
1581 | gfc_current_locus = old_loc; | |
1582 | end_flag = 0; | |
1583 | ||
1584 | done: | |
1585 | if (c == '\n') | |
1586 | continue_count = 0; | |
1587 | continue_flag = 0; | |
1588 | return c; | |
1589 | } | |
1590 | ||
1591 | ||
1592 | /* Get the next character of input, folded to lowercase. In fixed | |
1593 | form mode, we also ignore spaces. When matcher subroutines are | |
1594 | parsing character literals, they have to call | |
1595 | gfc_next_char_literal(). */ | |
1596 | ||
1597 | gfc_char_t | |
1598 | gfc_next_char (void) | |
1599 | { | |
1600 | gfc_char_t c; | |
1601 | ||
1602 | do | |
1603 | { | |
1604 | c = gfc_next_char_literal (NONSTRING); | |
1605 | } | |
1606 | while (gfc_current_form == FORM_FIXED && gfc_is_whitespace (c)); | |
1607 | ||
1608 | return gfc_wide_tolower (c); | |
1609 | } | |
1610 | ||
1611 | char | |
1612 | gfc_next_ascii_char (void) | |
1613 | { | |
1614 | gfc_char_t c = gfc_next_char (); | |
1615 | ||
1616 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c | |
1617 | : (unsigned char) UCHAR_MAX); | |
1618 | } | |
1619 | ||
1620 | ||
1621 | gfc_char_t | |
1622 | gfc_peek_char (void) | |
1623 | { | |
1624 | locus old_loc; | |
1625 | gfc_char_t c; | |
1626 | ||
1627 | old_loc = gfc_current_locus; | |
1628 | c = gfc_next_char (); | |
1629 | gfc_current_locus = old_loc; | |
1630 | ||
1631 | return c; | |
1632 | } | |
1633 | ||
1634 | ||
1635 | char | |
1636 | gfc_peek_ascii_char (void) | |
1637 | { | |
1638 | gfc_char_t c = gfc_peek_char (); | |
1639 | ||
1640 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c | |
1641 | : (unsigned char) UCHAR_MAX); | |
1642 | } | |
1643 | ||
1644 | ||
1645 | /* Recover from an error. We try to get past the current statement | |
1646 | and get lined up for the next. The next statement follows a '\n' | |
1647 | or a ';'. We also assume that we are not within a character | |
1648 | constant, and deal with finding a '\'' or '"'. */ | |
1649 | ||
1650 | void | |
1651 | gfc_error_recovery (void) | |
1652 | { | |
1653 | gfc_char_t c, delim; | |
1654 | ||
1655 | if (gfc_at_eof ()) | |
1656 | return; | |
1657 | ||
1658 | for (;;) | |
1659 | { | |
1660 | c = gfc_next_char (); | |
1661 | if (c == '\n' || c == ';') | |
1662 | break; | |
1663 | ||
1664 | if (c != '\'' && c != '"') | |
1665 | { | |
1666 | if (gfc_at_eof ()) | |
1667 | break; | |
1668 | continue; | |
1669 | } | |
1670 | delim = c; | |
1671 | ||
1672 | for (;;) | |
1673 | { | |
1674 | c = next_char (); | |
1675 | ||
1676 | if (c == delim) | |
1677 | break; | |
1678 | if (c == '\n') | |
1679 | return; | |
1680 | if (c == '\\') | |
1681 | { | |
1682 | c = next_char (); | |
1683 | if (c == '\n') | |
1684 | return; | |
1685 | } | |
1686 | } | |
1687 | if (gfc_at_eof ()) | |
1688 | break; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | ||
1693 | /* Read ahead until the next character to be read is not whitespace. */ | |
1694 | ||
1695 | void | |
1696 | gfc_gobble_whitespace (void) | |
1697 | { | |
1698 | static int linenum = 0; | |
1699 | locus old_loc; | |
1700 | gfc_char_t c; | |
1701 | ||
1702 | do | |
1703 | { | |
1704 | old_loc = gfc_current_locus; | |
1705 | c = gfc_next_char_literal (NONSTRING); | |
1706 | /* Issue a warning for nonconforming tabs. We keep track of the line | |
1707 | number because the Fortran matchers will often back up and the same | |
1708 | line will be scanned multiple times. */ | |
1709 | if (warn_tabs && c == '\t') | |
1710 | { | |
1711 | int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location); | |
1712 | if (cur_linenum != linenum) | |
1713 | { | |
1714 | linenum = cur_linenum; | |
1715 | gfc_warning_now (OPT_Wtabs, "Nonconforming tab character at %C"); | |
1716 | } | |
1717 | } | |
1718 | } | |
1719 | while (gfc_is_whitespace (c)); | |
1720 | ||
1721 | if (!ISPRINT(c) && c != '\n' && last_error_char != gfc_current_locus.nextc) | |
1722 | { | |
1723 | char buf[20]; | |
1724 | last_error_char = gfc_current_locus.nextc; | |
1725 | snprintf (buf, 20, "%2.2X", c); | |
1726 | gfc_error_now ("Invalid character 0x%s at %C", buf); | |
1727 | } | |
1728 | ||
1729 | gfc_current_locus = old_loc; | |
1730 | } | |
1731 | ||
1732 | ||
1733 | /* Load a single line into pbuf. | |
1734 | ||
1735 | If pbuf points to a NULL pointer, it is allocated. | |
1736 | We truncate lines that are too long, unless we're dealing with | |
1737 | preprocessor lines or if the option -ffixed-line-length-none is set, | |
1738 | in which case we reallocate the buffer to fit the entire line, if | |
1739 | need be. | |
1740 | In fixed mode, we expand a tab that occurs within the statement | |
1741 | label region to expand to spaces that leave the next character in | |
1742 | the source region. | |
1743 | ||
1744 | If first_char is not NULL, it's a pointer to a single char value holding | |
1745 | the first character of the line, which has already been read by the | |
1746 | caller. This avoids the use of ungetc(). | |
1747 | ||
1748 | load_line returns whether the line was truncated. | |
1749 | ||
1750 | NOTE: The error machinery isn't available at this point, so we can't | |
1751 | easily report line and column numbers consistent with other | |
1752 | parts of gfortran. */ | |
1753 | ||
1754 | static int | |
1755 | load_line (FILE *input, gfc_char_t **pbuf, int *pbuflen, const int *first_char) | |
1756 | { | |
1757 | int c, maxlen, i, preprocessor_flag, buflen = *pbuflen; | |
1758 | int trunc_flag = 0, seen_comment = 0; | |
1759 | int seen_printable = 0, seen_ampersand = 0, quoted = ' '; | |
1760 | gfc_char_t *buffer; | |
1761 | bool found_tab = false; | |
1762 | bool warned_tabs = false; | |
1763 | ||
1764 | /* Determine the maximum allowed line length. */ | |
1765 | if (gfc_current_form == FORM_FREE) | |
1766 | maxlen = flag_free_line_length; | |
1767 | else if (gfc_current_form == FORM_FIXED) | |
1768 | maxlen = flag_fixed_line_length; | |
1769 | else | |
1770 | maxlen = 72; | |
1771 | ||
1772 | if (*pbuf == NULL) | |
1773 | { | |
1774 | /* Allocate the line buffer, storing its length into buflen. | |
1775 | Note that if maxlen==0, indicating that arbitrary-length lines | |
1776 | are allowed, the buffer will be reallocated if this length is | |
1777 | insufficient; since 132 characters is the length of a standard | |
1778 | free-form line, we use that as a starting guess. */ | |
1779 | if (maxlen > 0) | |
1780 | buflen = maxlen; | |
1781 | else | |
1782 | buflen = 132; | |
1783 | ||
1784 | *pbuf = gfc_get_wide_string (buflen + 1); | |
1785 | } | |
1786 | ||
1787 | i = 0; | |
1788 | buffer = *pbuf; | |
1789 | ||
1790 | if (first_char) | |
1791 | c = *first_char; | |
1792 | else | |
1793 | c = getc (input); | |
1794 | ||
1795 | /* In order to not truncate preprocessor lines, we have to | |
1796 | remember that this is one. */ | |
1797 | preprocessor_flag = (c == '#' ? 1 : 0); | |
1798 | ||
1799 | for (;;) | |
1800 | { | |
1801 | if (c == EOF) | |
1802 | break; | |
1803 | ||
1804 | if (c == '\n') | |
1805 | { | |
1806 | /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */ | |
1807 | if (gfc_current_form == FORM_FREE | |
1808 | && !seen_printable && seen_ampersand) | |
1809 | { | |
1810 | if (pedantic) | |
1811 | gfc_error_now ("%<&%> not allowed by itself in line %d", | |
1812 | current_file->line); | |
1813 | else | |
1814 | gfc_warning_now (0, "%<&%> not allowed by itself in line %d", | |
1815 | current_file->line); | |
1816 | } | |
1817 | break; | |
1818 | } | |
1819 | ||
1820 | if (c == '\r' || c == '\0') | |
1821 | goto next_char; /* Gobble characters. */ | |
1822 | ||
1823 | if (c == '&') | |
1824 | { | |
1825 | if (seen_ampersand) | |
1826 | { | |
1827 | seen_ampersand = 0; | |
1828 | seen_printable = 1; | |
1829 | } | |
1830 | else | |
1831 | seen_ampersand = 1; | |
1832 | } | |
1833 | ||
1834 | if ((c != '&' && c != '!' && c != ' ') || (c == '!' && !seen_ampersand)) | |
1835 | seen_printable = 1; | |
1836 | ||
1837 | /* Is this a fixed-form comment? */ | |
1838 | if (gfc_current_form == FORM_FIXED && i == 0 | |
1839 | && (c == '*' || c == 'c' || c == 'd')) | |
1840 | seen_comment = 1; | |
1841 | ||
1842 | if (quoted == ' ') | |
1843 | { | |
1844 | if (c == '\'' || c == '"') | |
1845 | quoted = c; | |
1846 | } | |
1847 | else if (c == quoted) | |
1848 | quoted = ' '; | |
1849 | ||
1850 | /* Is this a free-form comment? */ | |
1851 | if (c == '!' && quoted == ' ') | |
1852 | seen_comment = 1; | |
1853 | ||
1854 | /* Vendor extension: "<tab>1" marks a continuation line. */ | |
1855 | if (found_tab) | |
1856 | { | |
1857 | found_tab = false; | |
1858 | if (c >= '1' && c <= '9') | |
1859 | { | |
1860 | *(buffer-1) = c; | |
1861 | goto next_char; | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | if (gfc_current_form == FORM_FIXED && c == '\t' && i < 6) | |
1866 | { | |
1867 | found_tab = true; | |
1868 | ||
1869 | if (warn_tabs && seen_comment == 0 && !warned_tabs) | |
1870 | { | |
1871 | warned_tabs = true; | |
1872 | gfc_warning_now (OPT_Wtabs, | |
1873 | "Nonconforming tab character in column %d " | |
1874 | "of line %d", i + 1, current_file->line); | |
1875 | } | |
1876 | ||
1877 | while (i < 6) | |
1878 | { | |
1879 | *buffer++ = ' '; | |
1880 | i++; | |
1881 | } | |
1882 | ||
1883 | goto next_char; | |
1884 | } | |
1885 | ||
1886 | *buffer++ = c; | |
1887 | i++; | |
1888 | ||
1889 | if (maxlen == 0 || preprocessor_flag) | |
1890 | { | |
1891 | if (i >= buflen) | |
1892 | { | |
1893 | /* Reallocate line buffer to double size to hold the | |
1894 | overlong line. */ | |
1895 | buflen = buflen * 2; | |
1896 | *pbuf = XRESIZEVEC (gfc_char_t, *pbuf, (buflen + 1)); | |
1897 | buffer = (*pbuf) + i; | |
1898 | } | |
1899 | } | |
1900 | else if (i >= maxlen) | |
1901 | { | |
1902 | bool trunc_warn = true; | |
1903 | ||
1904 | /* Enhancement, if the very next non-space character is an ampersand | |
1905 | or comment that we would otherwise warn about, don't mark as | |
1906 | truncated. */ | |
1907 | ||
1908 | /* Truncate the rest of the line. */ | |
1909 | for (;;) | |
1910 | { | |
1911 | c = getc (input); | |
1912 | if (c == '\r' || c == ' ') | |
1913 | continue; | |
1914 | ||
1915 | if (c == '\n' || c == EOF) | |
1916 | break; | |
1917 | ||
1918 | if (!trunc_warn && c != '!') | |
1919 | trunc_warn = true; | |
1920 | ||
1921 | if (trunc_warn && ((gfc_current_form == FORM_FIXED && c == '&') | |
1922 | || c == '!')) | |
1923 | trunc_warn = false; | |
1924 | ||
1925 | if (c == '!') | |
1926 | seen_comment = 1; | |
1927 | ||
1928 | if (trunc_warn && !seen_comment) | |
1929 | trunc_flag = 1; | |
1930 | } | |
1931 | ||
1932 | c = '\n'; | |
1933 | continue; | |
1934 | } | |
1935 | ||
1936 | next_char: | |
1937 | c = getc (input); | |
1938 | } | |
1939 | ||
1940 | /* Pad lines to the selected line length in fixed form. */ | |
1941 | if (gfc_current_form == FORM_FIXED | |
1942 | && flag_fixed_line_length != 0 | |
1943 | && flag_pad_source | |
1944 | && !preprocessor_flag | |
1945 | && c != EOF) | |
1946 | { | |
1947 | while (i++ < maxlen) | |
1948 | *buffer++ = ' '; | |
1949 | } | |
1950 | ||
1951 | *buffer = '\0'; | |
1952 | *pbuflen = buflen; | |
1953 | ||
1954 | return trunc_flag; | |
1955 | } | |
1956 | ||
1957 | ||
1958 | /* Get a gfc_file structure, initialize it and add it to | |
1959 | the file stack. */ | |
1960 | ||
1961 | static gfc_file * | |
1962 | get_file (const char *name, enum lc_reason reason) | |
1963 | { | |
1964 | gfc_file *f; | |
1965 | ||
1966 | f = XCNEW (gfc_file); | |
1967 | ||
1968 | f->filename = xstrdup (name); | |
1969 | ||
1970 | f->next = file_head; | |
1971 | file_head = f; | |
1972 | ||
1973 | f->up = current_file; | |
1974 | if (current_file != NULL) | |
1975 | f->inclusion_line = current_file->line; | |
1976 | ||
1977 | linemap_add (line_table, reason, false, f->filename, 1); | |
1978 | ||
1979 | return f; | |
1980 | } | |
1981 | ||
1982 | ||
1983 | /* Deal with a line from the C preprocessor. The | |
1984 | initial octothorp has already been seen. */ | |
1985 | ||
1986 | static void | |
1987 | preprocessor_line (gfc_char_t *c) | |
1988 | { | |
1989 | bool flag[5]; | |
1990 | int i, line; | |
1991 | gfc_char_t *wide_filename; | |
1992 | gfc_file *f; | |
1993 | int escaped, unescape; | |
1994 | char *filename; | |
1995 | ||
1996 | c++; | |
1997 | while (*c == ' ' || *c == '\t') | |
1998 | c++; | |
1999 | ||
2000 | if (*c < '0' || *c > '9') | |
2001 | goto bad_cpp_line; | |
2002 | ||
2003 | line = wide_atoi (c); | |
2004 | ||
2005 | c = wide_strchr (c, ' '); | |
2006 | if (c == NULL) | |
2007 | { | |
2008 | /* No file name given. Set new line number. */ | |
2009 | current_file->line = line; | |
2010 | return; | |
2011 | } | |
2012 | ||
2013 | /* Skip spaces. */ | |
2014 | while (*c == ' ' || *c == '\t') | |
2015 | c++; | |
2016 | ||
2017 | /* Skip quote. */ | |
2018 | if (*c != '"') | |
2019 | goto bad_cpp_line; | |
2020 | ++c; | |
2021 | ||
2022 | wide_filename = c; | |
2023 | ||
2024 | /* Make filename end at quote. */ | |
2025 | unescape = 0; | |
2026 | escaped = false; | |
2027 | while (*c && ! (!escaped && *c == '"')) | |
2028 | { | |
2029 | if (escaped) | |
2030 | escaped = false; | |
2031 | else if (*c == '\\') | |
2032 | { | |
2033 | escaped = true; | |
2034 | unescape++; | |
2035 | } | |
2036 | ++c; | |
2037 | } | |
2038 | ||
2039 | if (! *c) | |
2040 | /* Preprocessor line has no closing quote. */ | |
2041 | goto bad_cpp_line; | |
2042 | ||
2043 | *c++ = '\0'; | |
2044 | ||
2045 | /* Undo effects of cpp_quote_string. */ | |
2046 | if (unescape) | |
2047 | { | |
2048 | gfc_char_t *s = wide_filename; | |
2049 | gfc_char_t *d = gfc_get_wide_string (c - wide_filename - unescape); | |
2050 | ||
2051 | wide_filename = d; | |
2052 | while (*s) | |
2053 | { | |
2054 | if (*s == '\\') | |
2055 | *d++ = *++s; | |
2056 | else | |
2057 | *d++ = *s; | |
2058 | s++; | |
2059 | } | |
2060 | *d = '\0'; | |
2061 | } | |
2062 | ||
2063 | /* Get flags. */ | |
2064 | ||
2065 | flag[1] = flag[2] = flag[3] = flag[4] = false; | |
2066 | ||
2067 | for (;;) | |
2068 | { | |
2069 | c = wide_strchr (c, ' '); | |
2070 | if (c == NULL) | |
2071 | break; | |
2072 | ||
2073 | c++; | |
2074 | i = wide_atoi (c); | |
2075 | ||
2076 | if (i >= 1 && i <= 4) | |
2077 | flag[i] = true; | |
2078 | } | |
2079 | ||
2080 | /* Convert the filename in wide characters into a filename in narrow | |
2081 | characters. */ | |
2082 | filename = gfc_widechar_to_char (wide_filename, -1); | |
2083 | ||
2084 | /* Interpret flags. */ | |
2085 | ||
2086 | if (flag[1]) /* Starting new file. */ | |
2087 | { | |
2088 | f = get_file (filename, LC_RENAME); | |
2089 | add_file_change (f->filename, f->inclusion_line); | |
2090 | current_file = f; | |
2091 | } | |
2092 | ||
2093 | if (flag[2]) /* Ending current file. */ | |
2094 | { | |
2095 | if (!current_file->up | |
2096 | || filename_cmp (current_file->up->filename, filename) != 0) | |
2097 | { | |
2098 | linemap_line_start (line_table, current_file->line, 80); | |
2099 | /* ??? One could compute the exact column where the filename | |
2100 | starts and compute the exact location here. */ | |
2101 | gfc_warning_now_at (linemap_position_for_column (line_table, 1), | |
2102 | 0, "file %qs left but not entered", | |
2103 | filename); | |
2104 | current_file->line++; | |
2105 | if (unescape) | |
2106 | free (wide_filename); | |
2107 | free (filename); | |
2108 | return; | |
2109 | } | |
2110 | ||
2111 | add_file_change (NULL, line); | |
2112 | current_file = current_file->up; | |
2113 | linemap_add (line_table, LC_RENAME, false, current_file->filename, | |
2114 | current_file->line); | |
2115 | } | |
2116 | ||
2117 | /* The name of the file can be a temporary file produced by | |
2118 | cpp. Replace the name if it is different. */ | |
2119 | ||
2120 | if (filename_cmp (current_file->filename, filename) != 0) | |
2121 | { | |
2122 | /* FIXME: we leak the old filename because a pointer to it may be stored | |
2123 | in the linemap. Alternative could be using GC or updating linemap to | |
2124 | point to the new name, but there is no API for that currently. */ | |
2125 | current_file->filename = xstrdup (filename); | |
2126 | ||
2127 | /* We need to tell the linemap API that the filename changed. Just | |
2128 | changing current_file is insufficient. */ | |
2129 | linemap_add (line_table, LC_RENAME, false, current_file->filename, line); | |
2130 | } | |
2131 | ||
2132 | /* Set new line number. */ | |
2133 | current_file->line = line; | |
2134 | if (unescape) | |
2135 | free (wide_filename); | |
2136 | free (filename); | |
2137 | return; | |
2138 | ||
2139 | bad_cpp_line: | |
2140 | linemap_line_start (line_table, current_file->line, 80); | |
2141 | /* ??? One could compute the exact column where the directive | |
2142 | starts and compute the exact location here. */ | |
2143 | gfc_warning_now_at (linemap_position_for_column (line_table, 2), 0, | |
2144 | "Illegal preprocessor directive"); | |
2145 | current_file->line++; | |
2146 | } | |
2147 | ||
2148 | ||
2149 | static bool load_file (const char *, const char *, bool); | |
2150 | ||
2151 | /* include_line()-- Checks a line buffer to see if it is an include | |
2152 | line. If so, we call load_file() recursively to load the included | |
2153 | file. We never return a syntax error because a statement like | |
2154 | "include = 5" is perfectly legal. We return 0 if no include was | |
2155 | processed, 1 if we matched an include or -1 if include was | |
2156 | partially processed, but will need continuation lines. */ | |
2157 | ||
2158 | static int | |
2159 | include_line (gfc_char_t *line) | |
2160 | { | |
2161 | gfc_char_t quote, *c, *begin, *stop; | |
2162 | char *filename; | |
2163 | const char *include = "include"; | |
2164 | bool allow_continuation = flag_dec_include; | |
2165 | int i; | |
2166 | ||
2167 | c = line; | |
2168 | ||
2169 | if (flag_openmp || flag_openmp_simd) | |
2170 | { | |
2171 | if (gfc_current_form == FORM_FREE) | |
2172 | { | |
2173 | while (*c == ' ' || *c == '\t') | |
2174 | c++; | |
2175 | if (*c == '!' && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) | |
2176 | c += 3; | |
2177 | } | |
2178 | else | |
2179 | { | |
2180 | if ((*c == '!' || *c == 'c' || *c == 'C' || *c == '*') | |
2181 | && c[1] == '$' && c[2] == ' ') | |
2182 | c += 3; | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | if (gfc_current_form == FORM_FREE) | |
2187 | { | |
2188 | while (*c == ' ' || *c == '\t') | |
2189 | c++; | |
2190 | if (gfc_wide_strncasecmp (c, "include", 7)) | |
2191 | { | |
2192 | if (!allow_continuation) | |
2193 | return 0; | |
2194 | for (i = 0; i < 7; ++i) | |
2195 | { | |
2196 | gfc_char_t c1 = gfc_wide_tolower (*c); | |
2197 | if (c1 != (unsigned char) include[i]) | |
2198 | break; | |
2199 | c++; | |
2200 | } | |
2201 | if (i == 0 || *c != '&') | |
2202 | return 0; | |
2203 | c++; | |
2204 | while (*c == ' ' || *c == '\t') | |
2205 | c++; | |
2206 | if (*c == '\0' || *c == '!') | |
2207 | return -1; | |
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | c += 7; | |
2212 | } | |
2213 | else | |
2214 | { | |
2215 | while (*c == ' ' || *c == '\t') | |
2216 | c++; | |
2217 | if (flag_dec_include && *c == '0' && c - line == 5) | |
2218 | { | |
2219 | c++; | |
2220 | while (*c == ' ' || *c == '\t') | |
2221 | c++; | |
2222 | } | |
2223 | if (c - line < 6) | |
2224 | allow_continuation = false; | |
2225 | for (i = 0; i < 7; ++i) | |
2226 | { | |
2227 | gfc_char_t c1 = gfc_wide_tolower (*c); | |
2228 | if (c1 != (unsigned char) include[i]) | |
2229 | break; | |
2230 | c++; | |
2231 | while (*c == ' ' || *c == '\t') | |
2232 | c++; | |
2233 | } | |
2234 | if (!allow_continuation) | |
2235 | { | |
2236 | if (i != 7) | |
2237 | return 0; | |
2238 | } | |
2239 | else if (i != 7) | |
2240 | { | |
2241 | if (i == 0) | |
2242 | return 0; | |
2243 | ||
2244 | /* At the end of line or comment this might be continued. */ | |
2245 | if (*c == '\0' || *c == '!') | |
2246 | return -1; | |
2247 | ||
2248 | return 0; | |
2249 | } | |
2250 | } | |
2251 | ||
2252 | while (*c == ' ' || *c == '\t') | |
2253 | c++; | |
2254 | ||
2255 | /* Find filename between quotes. */ | |
2256 | ||
2257 | quote = *c++; | |
2258 | if (quote != '"' && quote != '\'') | |
2259 | { | |
2260 | if (allow_continuation) | |
2261 | { | |
2262 | if (gfc_current_form == FORM_FREE) | |
2263 | { | |
2264 | if (quote == '&') | |
2265 | { | |
2266 | while (*c == ' ' || *c == '\t') | |
2267 | c++; | |
2268 | if (*c == '\0' || *c == '!') | |
2269 | return -1; | |
2270 | } | |
2271 | } | |
2272 | else if (quote == '\0' || quote == '!') | |
2273 | return -1; | |
2274 | } | |
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | begin = c; | |
2279 | ||
2280 | bool cont = false; | |
2281 | while (*c != quote && *c != '\0') | |
2282 | { | |
2283 | if (allow_continuation && gfc_current_form == FORM_FREE) | |
2284 | { | |
2285 | if (*c == '&') | |
2286 | cont = true; | |
2287 | else if (*c != ' ' && *c != '\t') | |
2288 | cont = false; | |
2289 | } | |
2290 | c++; | |
2291 | } | |
2292 | ||
2293 | if (*c == '\0') | |
2294 | { | |
2295 | if (allow_continuation | |
2296 | && (cont || gfc_current_form != FORM_FREE)) | |
2297 | return -1; | |
2298 | return 0; | |
2299 | } | |
2300 | ||
2301 | stop = c++; | |
2302 | ||
2303 | while (*c == ' ' || *c == '\t') | |
2304 | c++; | |
2305 | ||
2306 | if (*c != '\0' && *c != '!') | |
2307 | return 0; | |
2308 | ||
2309 | /* We have an include line at this point. */ | |
2310 | ||
2311 | *stop = '\0'; /* It's ok to trash the buffer, as this line won't be | |
2312 | read by anything else. */ | |
2313 | ||
2314 | filename = gfc_widechar_to_char (begin, -1); | |
2315 | if (!load_file (filename, NULL, false)) | |
2316 | exit (FATAL_EXIT_CODE); | |
2317 | ||
2318 | free (filename); | |
2319 | return 1; | |
2320 | } | |
2321 | ||
2322 | /* Similarly, but try to parse an INCLUDE statement, using gfc_next_char etc. | |
2323 | APIs. Return 1 if recognized as valid INCLUDE statement and load_file has | |
2324 | been called, 0 if it is not a valid INCLUDE statement and -1 if eof has | |
2325 | been encountered while parsing it. */ | |
2326 | static int | |
2327 | include_stmt (gfc_linebuf *b) | |
2328 | { | |
2329 | int ret = 0, i, length; | |
2330 | const char *include = "include"; | |
2331 | gfc_char_t c, quote = 0; | |
2332 | locus str_locus; | |
2333 | char *filename; | |
2334 | ||
2335 | continue_flag = 0; | |
2336 | end_flag = 0; | |
2337 | gcc_attribute_flag = 0; | |
2338 | openmp_flag = 0; | |
2339 | openacc_flag = 0; | |
2340 | continue_count = 0; | |
2341 | continue_line = 0; | |
2342 | gfc_current_locus.lb = b; | |
2343 | gfc_current_locus.nextc = b->line; | |
2344 | ||
2345 | gfc_skip_comments (); | |
2346 | gfc_gobble_whitespace (); | |
2347 | ||
2348 | for (i = 0; i < 7; i++) | |
2349 | { | |
2350 | c = gfc_next_char (); | |
2351 | if (c != (unsigned char) include[i]) | |
2352 | { | |
2353 | if (gfc_current_form == FORM_FIXED | |
2354 | && i == 0 | |
2355 | && c == '0' | |
2356 | && gfc_current_locus.nextc == b->line + 6) | |
2357 | { | |
2358 | gfc_gobble_whitespace (); | |
2359 | i--; | |
2360 | continue; | |
2361 | } | |
2362 | gcc_assert (i != 0); | |
2363 | if (c == '\n') | |
2364 | { | |
2365 | gfc_advance_line (); | |
2366 | gfc_skip_comments (); | |
2367 | if (gfc_at_eof ()) | |
2368 | ret = -1; | |
2369 | } | |
2370 | goto do_ret; | |
2371 | } | |
2372 | } | |
2373 | gfc_gobble_whitespace (); | |
2374 | ||
2375 | c = gfc_next_char (); | |
2376 | if (c == '\'' || c == '"') | |
2377 | quote = c; | |
2378 | else | |
2379 | { | |
2380 | if (c == '\n') | |
2381 | { | |
2382 | gfc_advance_line (); | |
2383 | gfc_skip_comments (); | |
2384 | if (gfc_at_eof ()) | |
2385 | ret = -1; | |
2386 | } | |
2387 | goto do_ret; | |
2388 | } | |
2389 | ||
2390 | str_locus = gfc_current_locus; | |
2391 | length = 0; | |
2392 | do | |
2393 | { | |
2394 | c = gfc_next_char_literal (INSTRING_NOWARN); | |
2395 | if (c == quote) | |
2396 | break; | |
2397 | if (c == '\n') | |
2398 | { | |
2399 | gfc_advance_line (); | |
2400 | gfc_skip_comments (); | |
2401 | if (gfc_at_eof ()) | |
2402 | ret = -1; | |
2403 | goto do_ret; | |
2404 | } | |
2405 | length++; | |
2406 | } | |
2407 | while (1); | |
2408 | ||
2409 | gfc_gobble_whitespace (); | |
2410 | c = gfc_next_char (); | |
2411 | if (c != '\n') | |
2412 | goto do_ret; | |
2413 | ||
2414 | gfc_current_locus = str_locus; | |
2415 | ret = 1; | |
2416 | filename = XNEWVEC (char, length + 1); | |
2417 | for (i = 0; i < length; i++) | |
2418 | { | |
2419 | c = gfc_next_char_literal (INSTRING_WARN); | |
2420 | gcc_assert (gfc_wide_fits_in_byte (c)); | |
2421 | filename[i] = (unsigned char) c; | |
2422 | } | |
2423 | filename[length] = '\0'; | |
2424 | if (!load_file (filename, NULL, false)) | |
2425 | exit (FATAL_EXIT_CODE); | |
2426 | ||
2427 | free (filename); | |
2428 | ||
2429 | do_ret: | |
2430 | continue_flag = 0; | |
2431 | end_flag = 0; | |
2432 | gcc_attribute_flag = 0; | |
2433 | openmp_flag = 0; | |
2434 | openacc_flag = 0; | |
2435 | continue_count = 0; | |
2436 | continue_line = 0; | |
2437 | memset (&gfc_current_locus, '\0', sizeof (locus)); | |
2438 | memset (&openmp_locus, '\0', sizeof (locus)); | |
2439 | memset (&openacc_locus, '\0', sizeof (locus)); | |
2440 | memset (&gcc_attribute_locus, '\0', sizeof (locus)); | |
2441 | return ret; | |
2442 | } | |
2443 | ||
2444 | /* Load a file into memory by calling load_line until the file ends. */ | |
2445 | ||
2446 | static bool | |
2447 | load_file (const char *realfilename, const char *displayedname, bool initial) | |
2448 | { | |
2449 | gfc_char_t *line; | |
2450 | gfc_linebuf *b, *include_b = NULL; | |
2451 | gfc_file *f; | |
2452 | FILE *input; | |
2453 | int len, line_len; | |
2454 | bool first_line; | |
2455 | struct stat st; | |
2456 | int stat_result; | |
2457 | const char *filename; | |
2458 | /* If realfilename and displayedname are different and non-null then | |
2459 | surely realfilename is the preprocessed form of | |
2460 | displayedname. */ | |
2461 | bool preprocessed_p = (realfilename && displayedname | |
2462 | && strcmp (realfilename, displayedname)); | |
2463 | ||
2464 | filename = displayedname ? displayedname : realfilename; | |
2465 | ||
2466 | for (f = current_file; f; f = f->up) | |
2467 | if (filename_cmp (filename, f->filename) == 0) | |
2468 | { | |
2469 | fprintf (stderr, "%s:%d: Error: File '%s' is being included " | |
2470 | "recursively\n", current_file->filename, current_file->line, | |
2471 | filename); | |
2472 | return false; | |
2473 | } | |
2474 | ||
2475 | if (initial) | |
2476 | { | |
2477 | if (gfc_src_file) | |
2478 | { | |
2479 | input = gfc_src_file; | |
2480 | gfc_src_file = NULL; | |
2481 | } | |
2482 | else | |
2483 | input = gfc_open_file (realfilename); | |
2484 | ||
2485 | if (input == NULL) | |
2486 | { | |
2487 | gfc_error_now ("Cannot open file %qs", filename); | |
2488 | return false; | |
2489 | } | |
2490 | } | |
2491 | else | |
2492 | { | |
2493 | input = gfc_open_included_file (realfilename, false, false); | |
2494 | if (input == NULL) | |
2495 | { | |
2496 | /* For -fpre-include file, current_file is NULL. */ | |
2497 | if (current_file) | |
2498 | fprintf (stderr, "%s:%d: Error: Can't open included file '%s'\n", | |
2499 | current_file->filename, current_file->line, filename); | |
2500 | else | |
2501 | fprintf (stderr, "Error: Can't open pre-included file '%s'\n", | |
2502 | filename); | |
2503 | ||
2504 | return false; | |
2505 | } | |
2506 | stat_result = stat (realfilename, &st); | |
2507 | if (stat_result == 0 && !S_ISREG(st.st_mode)) | |
2508 | { | |
2509 | fprintf (stderr, "%s:%d: Error: Included path '%s'" | |
2510 | " is not a regular file\n", | |
2511 | current_file->filename, current_file->line, filename); | |
2512 | fclose (input); | |
2513 | return false; | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | /* Load the file. | |
2518 | ||
2519 | A "non-initial" file means a file that is being included. In | |
2520 | that case we are creating an LC_ENTER map. | |
2521 | ||
2522 | An "initial" file means a main file; one that is not included. | |
2523 | That file has already got at least one (surely more) line map(s) | |
2524 | created by gfc_init. So the subsequent map created in that case | |
2525 | must have LC_RENAME reason. | |
2526 | ||
2527 | This latter case is not true for a preprocessed file. In that | |
2528 | case, although the file is "initial", the line maps created by | |
2529 | gfc_init was used during the preprocessing of the file. Now that | |
2530 | the preprocessing is over and we are being fed the result of that | |
2531 | preprocessing, we need to create a brand new line map for the | |
2532 | preprocessed file, so the reason is going to be LC_ENTER. */ | |
2533 | ||
2534 | f = get_file (filename, (initial && !preprocessed_p) ? LC_RENAME : LC_ENTER); | |
2535 | if (!initial) | |
2536 | add_file_change (f->filename, f->inclusion_line); | |
2537 | current_file = f; | |
2538 | current_file->line = 1; | |
2539 | line = NULL; | |
2540 | line_len = 0; | |
2541 | first_line = true; | |
2542 | ||
2543 | if (initial && gfc_src_preprocessor_lines[0]) | |
2544 | { | |
2545 | preprocessor_line (gfc_src_preprocessor_lines[0]); | |
2546 | free (gfc_src_preprocessor_lines[0]); | |
2547 | gfc_src_preprocessor_lines[0] = NULL; | |
2548 | if (gfc_src_preprocessor_lines[1]) | |
2549 | { | |
2550 | preprocessor_line (gfc_src_preprocessor_lines[1]); | |
2551 | free (gfc_src_preprocessor_lines[1]); | |
2552 | gfc_src_preprocessor_lines[1] = NULL; | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | for (;;) | |
2557 | { | |
2558 | int trunc = load_line (input, &line, &line_len, NULL); | |
2559 | int inc_line; | |
2560 | ||
2561 | len = gfc_wide_strlen (line); | |
2562 | if (feof (input) && len == 0) | |
2563 | break; | |
2564 | ||
2565 | /* If this is the first line of the file, it can contain a byte | |
2566 | order mark (BOM), which we will ignore: | |
2567 | FF FE is UTF-16 little endian, | |
2568 | FE FF is UTF-16 big endian, | |
2569 | EF BB BF is UTF-8. */ | |
2570 | if (first_line | |
2571 | && ((line_len >= 2 && line[0] == (unsigned char) '\xFF' | |
2572 | && line[1] == (unsigned char) '\xFE') | |
2573 | || (line_len >= 2 && line[0] == (unsigned char) '\xFE' | |
2574 | && line[1] == (unsigned char) '\xFF') | |
2575 | || (line_len >= 3 && line[0] == (unsigned char) '\xEF' | |
2576 | && line[1] == (unsigned char) '\xBB' | |
2577 | && line[2] == (unsigned char) '\xBF'))) | |
2578 | { | |
2579 | int n = line[1] == (unsigned char) '\xBB' ? 3 : 2; | |
2580 | gfc_char_t *new_char = gfc_get_wide_string (line_len); | |
2581 | ||
2582 | wide_strcpy (new_char, &line[n]); | |
2583 | free (line); | |
2584 | line = new_char; | |
2585 | len -= n; | |
2586 | } | |
2587 | ||
2588 | /* There are three things this line can be: a line of Fortran | |
2589 | source, an include line or a C preprocessor directive. */ | |
2590 | ||
2591 | if (line[0] == '#') | |
2592 | { | |
2593 | /* When -g3 is specified, it's possible that we emit #define | |
2594 | and #undef lines, which we need to pass to the middle-end | |
2595 | so that it can emit correct debug info. */ | |
2596 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
2597 | && (wide_strncmp (line, "#define ", 8) == 0 | |
2598 | || wide_strncmp (line, "#undef ", 7) == 0)) | |
2599 | ; | |
2600 | else | |
2601 | { | |
2602 | preprocessor_line (line); | |
2603 | continue; | |
2604 | } | |
2605 | } | |
2606 | ||
2607 | /* Preprocessed files have preprocessor lines added before the byte | |
2608 | order mark, so first_line is not about the first line of the file | |
2609 | but the first line that's not a preprocessor line. */ | |
2610 | first_line = false; | |
2611 | ||
2612 | inc_line = include_line (line); | |
2613 | if (inc_line > 0) | |
2614 | { | |
2615 | current_file->line++; | |
2616 | continue; | |
2617 | } | |
2618 | ||
2619 | /* Add line. */ | |
2620 | ||
2621 | b = XCNEWVAR (gfc_linebuf, gfc_linebuf_header_size | |
2622 | + (len + 1) * sizeof (gfc_char_t)); | |
2623 | ||
2624 | ||
2625 | b->location | |
2626 | = linemap_line_start (line_table, current_file->line++, len); | |
2627 | /* ??? We add the location for the maximum column possible here, | |
2628 | because otherwise if the next call creates a new line-map, it | |
2629 | will not reserve space for any offset. */ | |
2630 | if (len > 0) | |
2631 | linemap_position_for_column (line_table, len); | |
2632 | ||
2633 | b->file = current_file; | |
2634 | b->truncated = trunc; | |
2635 | wide_strcpy (b->line, line); | |
2636 | ||
2637 | if (line_head == NULL) | |
2638 | line_head = b; | |
2639 | else | |
2640 | line_tail->next = b; | |
2641 | ||
2642 | line_tail = b; | |
2643 | ||
2644 | while (file_changes_cur < file_changes_count) | |
2645 | file_changes[file_changes_cur++].lb = b; | |
2646 | ||
2647 | if (flag_dec_include) | |
2648 | { | |
2649 | if (include_b && b != include_b) | |
2650 | { | |
2651 | int inc_line2 = include_stmt (include_b); | |
2652 | if (inc_line2 == 0) | |
2653 | include_b = NULL; | |
2654 | else if (inc_line2 > 0) | |
2655 | { | |
2656 | do | |
2657 | { | |
2658 | if (gfc_current_form == FORM_FIXED) | |
2659 | { | |
2660 | for (gfc_char_t *p = include_b->line; *p; p++) | |
2661 | *p = ' '; | |
2662 | } | |
2663 | else | |
2664 | include_b->line[0] = '\0'; | |
2665 | if (include_b == b) | |
2666 | break; | |
2667 | include_b = include_b->next; | |
2668 | } | |
2669 | while (1); | |
2670 | include_b = NULL; | |
2671 | } | |
2672 | } | |
2673 | if (inc_line == -1 && !include_b) | |
2674 | include_b = b; | |
2675 | } | |
2676 | } | |
2677 | ||
2678 | /* Release the line buffer allocated in load_line. */ | |
2679 | free (line); | |
2680 | ||
2681 | fclose (input); | |
2682 | ||
2683 | if (!initial) | |
2684 | add_file_change (NULL, current_file->inclusion_line + 1); | |
2685 | current_file = current_file->up; | |
2686 | linemap_add (line_table, LC_LEAVE, 0, NULL, 0); | |
2687 | return true; | |
2688 | } | |
2689 | ||
2690 | ||
2691 | /* Open a new file and start scanning from that file. Returns true | |
2692 | if everything went OK, false otherwise. If form == FORM_UNKNOWN | |
2693 | it tries to determine the source form from the filename, defaulting | |
2694 | to free form. */ | |
2695 | ||
2696 | bool | |
2697 | gfc_new_file (void) | |
2698 | { | |
2699 | bool result; | |
2700 | ||
2701 | if (flag_pre_include != NULL | |
2702 | && !load_file (flag_pre_include, NULL, false)) | |
2703 | exit (FATAL_EXIT_CODE); | |
2704 | ||
2705 | if (gfc_cpp_enabled ()) | |
2706 | { | |
2707 | result = gfc_cpp_preprocess (gfc_source_file); | |
2708 | if (!gfc_cpp_preprocess_only ()) | |
2709 | result = load_file (gfc_cpp_temporary_file (), gfc_source_file, true); | |
2710 | } | |
2711 | else | |
2712 | result = load_file (gfc_source_file, NULL, true); | |
2713 | ||
2714 | gfc_current_locus.lb = line_head; | |
2715 | gfc_current_locus.nextc = (line_head == NULL) ? NULL : line_head->line; | |
2716 | ||
2717 | #if 0 /* Debugging aid. */ | |
2718 | for (; line_head; line_head = line_head->next) | |
2719 | printf ("%s:%3d %s\n", LOCATION_FILE (line_head->location), | |
2720 | LOCATION_LINE (line_head->location), line_head->line); | |
2721 | ||
2722 | exit (SUCCESS_EXIT_CODE); | |
2723 | #endif | |
2724 | ||
2725 | return result; | |
2726 | } | |
2727 | ||
2728 | static char * | |
2729 | unescape_filename (const char *ptr) | |
2730 | { | |
2731 | const char *p = ptr, *s; | |
2732 | char *d, *ret; | |
2733 | int escaped, unescape = 0; | |
2734 | ||
2735 | /* Make filename end at quote. */ | |
2736 | escaped = false; | |
2737 | while (*p && ! (! escaped && *p == '"')) | |
2738 | { | |
2739 | if (escaped) | |
2740 | escaped = false; | |
2741 | else if (*p == '\\') | |
2742 | { | |
2743 | escaped = true; | |
2744 | unescape++; | |
2745 | } | |
2746 | ++p; | |
2747 | } | |
2748 | ||
2749 | if (!*p || p[1]) | |
2750 | return NULL; | |
2751 | ||
2752 | /* Undo effects of cpp_quote_string. */ | |
2753 | s = ptr; | |
2754 | d = XCNEWVEC (char, p + 1 - ptr - unescape); | |
2755 | ret = d; | |
2756 | ||
2757 | while (s != p) | |
2758 | { | |
2759 | if (*s == '\\') | |
2760 | *d++ = *++s; | |
2761 | else | |
2762 | *d++ = *s; | |
2763 | s++; | |
2764 | } | |
2765 | *d = '\0'; | |
2766 | return ret; | |
2767 | } | |
2768 | ||
2769 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
2770 | handle the directives so we know the original file name. */ | |
2771 | ||
2772 | const char * | |
2773 | gfc_read_orig_filename (const char *filename, const char **canon_source_file) | |
2774 | { | |
2775 | int c, len; | |
2776 | char *dirname, *tmp; | |
2777 | ||
2778 | gfc_src_file = gfc_open_file (filename); | |
2779 | if (gfc_src_file == NULL) | |
2780 | return NULL; | |
2781 | ||
2782 | c = getc (gfc_src_file); | |
2783 | ||
2784 | if (c != '#') | |
2785 | return NULL; | |
2786 | ||
2787 | len = 0; | |
2788 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[0], &len, &c); | |
2789 | ||
2790 | if (wide_strncmp (gfc_src_preprocessor_lines[0], "# 1 \"", 5) != 0) | |
2791 | return NULL; | |
2792 | ||
2793 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[0][5], -1); | |
2794 | filename = unescape_filename (tmp); | |
2795 | free (tmp); | |
2796 | if (filename == NULL) | |
2797 | return NULL; | |
2798 | ||
2799 | c = getc (gfc_src_file); | |
2800 | ||
2801 | if (c != '#') | |
2802 | return filename; | |
2803 | ||
2804 | len = 0; | |
2805 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[1], &len, &c); | |
2806 | ||
2807 | if (wide_strncmp (gfc_src_preprocessor_lines[1], "# 1 \"", 5) != 0) | |
2808 | return filename; | |
2809 | ||
2810 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[1][5], -1); | |
2811 | dirname = unescape_filename (tmp); | |
2812 | free (tmp); | |
2813 | if (dirname == NULL) | |
2814 | return filename; | |
2815 | ||
2816 | len = strlen (dirname); | |
2817 | if (len < 3 || dirname[len - 1] != '/' || dirname[len - 2] != '/') | |
2818 | { | |
2819 | free (dirname); | |
2820 | return filename; | |
2821 | } | |
2822 | dirname[len - 2] = '\0'; | |
2823 | set_src_pwd (dirname); | |
2824 | ||
2825 | if (! IS_ABSOLUTE_PATH (filename)) | |
2826 | { | |
2827 | char *p = XCNEWVEC (char, len + strlen (filename)); | |
2828 | ||
2829 | memcpy (p, dirname, len - 2); | |
2830 | p[len - 2] = '/'; | |
2831 | strcpy (p + len - 1, filename); | |
2832 | *canon_source_file = p; | |
2833 | } | |
2834 | ||
2835 | free (dirname); | |
2836 | return filename; | |
2837 | } |