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6de9cd9a | 1 | /* Character scanner. |
e3339d0f JM |
2 | Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
3 | 2010 Free Software Foundation, Inc. | |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
21 | |
22 | /* Set of subroutines to (ultimately) return the next character to the | |
23 | various matching subroutines. This file's job is to read files and | |
24 | build up lines that are parsed by the parser. This means that we | |
25 | handle continuation lines and "include" lines. | |
26 | ||
27 | The first thing the scanner does is to load an entire file into | |
28 | memory. We load the entire file into memory for a couple reasons. | |
29 | The first is that we want to be able to deal with nonseekable input | |
30 | (pipes, stdin) and there is a lot of backing up involved during | |
31 | parsing. | |
32 | ||
33 | The second is that we want to be able to print the locus of errors, | |
34 | and an error on line 999999 could conflict with something on line | |
35 | one. Given nonseekable input, we've got to store the whole thing. | |
36 | ||
37 | One thing that helps are the column truncation limits that give us | |
38 | an upper bound on the size of individual lines. We don't store the | |
39 | truncated stuff. | |
40 | ||
41 | From the scanner's viewpoint, the higher level subroutines ask for | |
42 | new characters and do a lot of jumping backwards. */ | |
43 | ||
44 | #include "config.h" | |
d22e4895 | 45 | #include "system.h" |
953bee7c | 46 | #include "coretypes.h" |
6de9cd9a | 47 | #include "gfortran.h" |
7274feea | 48 | #include "toplev.h" /* For set_src_pwd. */ |
9e8a6720 FXC |
49 | #include "debug.h" |
50 | #include "flags.h" | |
670637ee | 51 | #include "cpp.h" |
6de9cd9a DN |
52 | |
53 | /* Structure for holding module and include file search path. */ | |
54 | typedef struct gfc_directorylist | |
55 | { | |
56 | char *path; | |
31198773 | 57 | bool use_for_modules; |
6de9cd9a DN |
58 | struct gfc_directorylist *next; |
59 | } | |
60 | gfc_directorylist; | |
61 | ||
62 | /* List of include file search directories. */ | |
31198773 | 63 | static gfc_directorylist *include_dirs, *intrinsic_modules_dirs; |
6de9cd9a | 64 | |
d4fa05b9 | 65 | static gfc_file *file_head, *current_file; |
6de9cd9a | 66 | |
08a6b8e0 | 67 | static int continue_flag, end_flag, openmp_flag, gcc_attribute_flag; |
5a06474c | 68 | static int continue_count, continue_line; |
6c7a4dfd | 69 | static locus openmp_locus; |
08a6b8e0 | 70 | static locus gcc_attribute_locus; |
6de9cd9a | 71 | |
d4fa05b9 TS |
72 | gfc_source_form gfc_current_form; |
73 | static gfc_linebuf *line_head, *line_tail; | |
74 | ||
63645982 | 75 | locus gfc_current_locus; |
e0bcf78c | 76 | const char *gfc_source_file; |
2d7c7df6 | 77 | static FILE *gfc_src_file; |
8fc541d3 | 78 | static gfc_char_t *gfc_src_preprocessor_lines[2]; |
2d7c7df6 | 79 | |
1b271c9b JJ |
80 | static struct gfc_file_change |
81 | { | |
82 | const char *filename; | |
83 | gfc_linebuf *lb; | |
84 | int line; | |
85 | } *file_changes; | |
86 | size_t file_changes_cur, file_changes_count; | |
87 | size_t file_changes_allocated; | |
88 | ||
8fc541d3 FXC |
89 | |
90 | /* Functions dealing with our wide characters (gfc_char_t) and | |
91 | sequences of such characters. */ | |
92 | ||
93 | int | |
94 | gfc_wide_fits_in_byte (gfc_char_t c) | |
95 | { | |
96 | return (c <= UCHAR_MAX); | |
97 | } | |
98 | ||
99 | static inline int | |
100 | wide_is_ascii (gfc_char_t c) | |
101 | { | |
102 | return (gfc_wide_fits_in_byte (c) && ((unsigned char) c & ~0x7f) == 0); | |
103 | } | |
104 | ||
105 | int | |
106 | gfc_wide_is_printable (gfc_char_t c) | |
107 | { | |
108 | return (gfc_wide_fits_in_byte (c) && ISPRINT ((unsigned char) c)); | |
109 | } | |
110 | ||
111 | gfc_char_t | |
112 | gfc_wide_tolower (gfc_char_t c) | |
113 | { | |
114 | return (wide_is_ascii (c) ? (gfc_char_t) TOLOWER((unsigned char) c) : c); | |
115 | } | |
116 | ||
00660189 FXC |
117 | gfc_char_t |
118 | gfc_wide_toupper (gfc_char_t c) | |
119 | { | |
120 | return (wide_is_ascii (c) ? (gfc_char_t) TOUPPER((unsigned char) c) : c); | |
121 | } | |
122 | ||
8fc541d3 FXC |
123 | int |
124 | gfc_wide_is_digit (gfc_char_t c) | |
125 | { | |
126 | return (c >= '0' && c <= '9'); | |
127 | } | |
128 | ||
129 | static inline int | |
130 | wide_atoi (gfc_char_t *c) | |
131 | { | |
132 | #define MAX_DIGITS 20 | |
133 | char buf[MAX_DIGITS+1]; | |
134 | int i = 0; | |
135 | ||
136 | while (gfc_wide_is_digit(*c) && i < MAX_DIGITS) | |
137 | buf[i++] = *c++; | |
138 | buf[i] = '\0'; | |
139 | return atoi (buf); | |
140 | } | |
141 | ||
142 | size_t | |
143 | gfc_wide_strlen (const gfc_char_t *str) | |
144 | { | |
145 | size_t i; | |
146 | ||
147 | for (i = 0; str[i]; i++) | |
148 | ; | |
149 | ||
150 | return i; | |
151 | } | |
152 | ||
00660189 FXC |
153 | gfc_char_t * |
154 | gfc_wide_memset (gfc_char_t *b, gfc_char_t c, size_t len) | |
155 | { | |
156 | size_t i; | |
157 | ||
158 | for (i = 0; i < len; i++) | |
159 | b[i] = c; | |
160 | ||
161 | return b; | |
162 | } | |
163 | ||
8fc541d3 FXC |
164 | static gfc_char_t * |
165 | wide_strcpy (gfc_char_t *dest, const gfc_char_t *src) | |
166 | { | |
167 | gfc_char_t *d; | |
168 | ||
169 | for (d = dest; (*d = *src) != '\0'; ++src, ++d) | |
170 | ; | |
171 | ||
172 | return dest; | |
173 | } | |
174 | ||
175 | static gfc_char_t * | |
00660189 | 176 | wide_strchr (const gfc_char_t *s, gfc_char_t c) |
8fc541d3 FXC |
177 | { |
178 | do { | |
179 | if (*s == c) | |
180 | { | |
00660189 | 181 | return CONST_CAST(gfc_char_t *, s); |
8fc541d3 FXC |
182 | } |
183 | } while (*s++); | |
184 | return 0; | |
185 | } | |
186 | ||
00660189 FXC |
187 | char * |
188 | gfc_widechar_to_char (const gfc_char_t *s, int length) | |
189 | { | |
190 | size_t len, i; | |
191 | char *res; | |
192 | ||
193 | if (s == NULL) | |
194 | return NULL; | |
195 | ||
196 | /* Passing a negative length is used to indicate that length should be | |
197 | calculated using gfc_wide_strlen(). */ | |
198 | len = (length >= 0 ? (size_t) length : gfc_wide_strlen (s)); | |
ece3f663 | 199 | res = XNEWVEC (char, len + 1); |
00660189 FXC |
200 | |
201 | for (i = 0; i < len; i++) | |
202 | { | |
203 | gcc_assert (gfc_wide_fits_in_byte (s[i])); | |
204 | res[i] = (unsigned char) s[i]; | |
205 | } | |
206 | ||
207 | res[len] = '\0'; | |
208 | return res; | |
209 | } | |
210 | ||
211 | gfc_char_t * | |
212 | gfc_char_to_widechar (const char *s) | |
8fc541d3 | 213 | { |
00660189 FXC |
214 | size_t len, i; |
215 | gfc_char_t *res; | |
216 | ||
217 | if (s == NULL) | |
218 | return NULL; | |
219 | ||
220 | len = strlen (s); | |
221 | res = gfc_get_wide_string (len + 1); | |
8fc541d3 FXC |
222 | |
223 | for (i = 0; i < len; i++) | |
00660189 | 224 | res[i] = (unsigned char) s[i]; |
8fc541d3 FXC |
225 | |
226 | res[len] = '\0'; | |
227 | return res; | |
228 | } | |
229 | ||
230 | static int | |
231 | wide_strncmp (const gfc_char_t *s1, const char *s2, size_t n) | |
232 | { | |
233 | gfc_char_t c1, c2; | |
234 | ||
235 | while (n-- > 0) | |
236 | { | |
237 | c1 = *s1++; | |
238 | c2 = *s2++; | |
239 | if (c1 != c2) | |
240 | return (c1 > c2 ? 1 : -1); | |
241 | if (c1 == '\0') | |
242 | return 0; | |
243 | } | |
244 | return 0; | |
245 | } | |
246 | ||
00660189 FXC |
247 | int |
248 | gfc_wide_strncasecmp (const gfc_char_t *s1, const char *s2, size_t n) | |
8fc541d3 FXC |
249 | { |
250 | gfc_char_t c1, c2; | |
251 | ||
252 | while (n-- > 0) | |
253 | { | |
254 | c1 = gfc_wide_tolower (*s1++); | |
255 | c2 = TOLOWER (*s2++); | |
256 | if (c1 != c2) | |
257 | return (c1 > c2 ? 1 : -1); | |
258 | if (c1 == '\0') | |
259 | return 0; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
264 | ||
6de9cd9a DN |
265 | /* Main scanner initialization. */ |
266 | ||
267 | void | |
268 | gfc_scanner_init_1 (void) | |
269 | { | |
d4fa05b9 TS |
270 | file_head = NULL; |
271 | line_head = NULL; | |
272 | line_tail = NULL; | |
6de9cd9a | 273 | |
5a06474c JD |
274 | continue_count = 0; |
275 | continue_line = 0; | |
276 | ||
6de9cd9a DN |
277 | end_flag = 0; |
278 | } | |
279 | ||
280 | ||
281 | /* Main scanner destructor. */ | |
282 | ||
283 | void | |
284 | gfc_scanner_done_1 (void) | |
285 | { | |
d4fa05b9 TS |
286 | gfc_linebuf *lb; |
287 | gfc_file *f; | |
6de9cd9a | 288 | |
d4fa05b9 | 289 | while(line_head != NULL) |
6de9cd9a | 290 | { |
d4fa05b9 | 291 | lb = line_head->next; |
cede9502 | 292 | free (line_head); |
d4fa05b9 | 293 | line_head = lb; |
6de9cd9a | 294 | } |
d4fa05b9 TS |
295 | |
296 | while(file_head != NULL) | |
6de9cd9a | 297 | { |
d4fa05b9 | 298 | f = file_head->next; |
cede9502 JM |
299 | free (file_head->filename); |
300 | free (file_head); | |
d4fa05b9 | 301 | file_head = f; |
6de9cd9a DN |
302 | } |
303 | } | |
304 | ||
305 | ||
306 | /* Adds path to the list pointed to by list. */ | |
307 | ||
31198773 FXC |
308 | static void |
309 | add_path_to_list (gfc_directorylist **list, const char *path, | |
0ee1b105 | 310 | bool use_for_modules, bool head) |
6de9cd9a DN |
311 | { |
312 | gfc_directorylist *dir; | |
313 | const char *p; | |
314 | ||
315 | p = path; | |
31198773 | 316 | while (*p == ' ' || *p == '\t') /* someone might do "-I include" */ |
6de9cd9a DN |
317 | if (*p++ == '\0') |
318 | return; | |
319 | ||
0ee1b105 TB |
320 | if (head || *list == NULL) |
321 | { | |
322 | dir = XCNEW (gfc_directorylist); | |
323 | if (!head) | |
324 | *list = dir; | |
325 | } | |
6de9cd9a DN |
326 | else |
327 | { | |
0ee1b105 | 328 | dir = *list; |
6de9cd9a DN |
329 | while (dir->next) |
330 | dir = dir->next; | |
331 | ||
ece3f663 | 332 | dir->next = XCNEW (gfc_directorylist); |
6de9cd9a DN |
333 | dir = dir->next; |
334 | } | |
335 | ||
0ee1b105 TB |
336 | dir->next = head ? *list : NULL; |
337 | if (head) | |
338 | *list = dir; | |
31198773 | 339 | dir->use_for_modules = use_for_modules; |
ece3f663 | 340 | dir->path = XCNEWVEC (char, strlen (p) + 2); |
6de9cd9a DN |
341 | strcpy (dir->path, p); |
342 | strcat (dir->path, "/"); /* make '/' last character */ | |
343 | } | |
344 | ||
345 | ||
31198773 | 346 | void |
0ee1b105 | 347 | gfc_add_include_path (const char *path, bool use_for_modules, bool file_dir) |
31198773 | 348 | { |
0ee1b105 TB |
349 | add_path_to_list (&include_dirs, path, use_for_modules, file_dir); |
350 | ||
351 | /* For '#include "..."' these directories are automatically searched. */ | |
352 | if (!file_dir) | |
353 | gfc_cpp_add_include_path (xstrdup(path), true); | |
31198773 FXC |
354 | } |
355 | ||
356 | ||
357 | void | |
358 | gfc_add_intrinsic_modules_path (const char *path) | |
359 | { | |
0ee1b105 | 360 | add_path_to_list (&intrinsic_modules_dirs, path, true, false); |
31198773 FXC |
361 | } |
362 | ||
363 | ||
6de9cd9a DN |
364 | /* Release resources allocated for options. */ |
365 | ||
366 | void | |
367 | gfc_release_include_path (void) | |
368 | { | |
369 | gfc_directorylist *p; | |
370 | ||
6de9cd9a DN |
371 | while (include_dirs != NULL) |
372 | { | |
373 | p = include_dirs; | |
374 | include_dirs = include_dirs->next; | |
cede9502 JM |
375 | free (p->path); |
376 | free (p); | |
6de9cd9a | 377 | } |
31198773 | 378 | |
31198773 FXC |
379 | while (intrinsic_modules_dirs != NULL) |
380 | { | |
381 | p = intrinsic_modules_dirs; | |
382 | intrinsic_modules_dirs = intrinsic_modules_dirs->next; | |
cede9502 JM |
383 | free (p->path); |
384 | free (p); | |
31198773 | 385 | } |
1bc23383 | 386 | |
cede9502 | 387 | free (gfc_option.module_dir); |
6de9cd9a DN |
388 | } |
389 | ||
6de9cd9a | 390 | |
31198773 | 391 | static FILE * |
d8ddea40 DF |
392 | open_included_file (const char *name, gfc_directorylist *list, |
393 | bool module, bool system) | |
6de9cd9a | 394 | { |
200cfbe7 | 395 | char *fullname; |
6de9cd9a DN |
396 | gfc_directorylist *p; |
397 | FILE *f; | |
398 | ||
31198773 | 399 | for (p = list; p; p = p->next) |
b424a572 | 400 | { |
31198773 FXC |
401 | if (module && !p->use_for_modules) |
402 | continue; | |
6de9cd9a | 403 | |
200cfbe7 | 404 | fullname = (char *) alloca(strlen (p->path) + strlen (name) + 1); |
6de9cd9a DN |
405 | strcpy (fullname, p->path); |
406 | strcat (fullname, name); | |
407 | ||
408 | f = gfc_open_file (fullname); | |
409 | if (f != NULL) | |
d8ddea40 DF |
410 | { |
411 | if (gfc_cpp_makedep ()) | |
412 | gfc_cpp_add_dep (fullname, system); | |
413 | ||
414 | return f; | |
415 | } | |
6de9cd9a DN |
416 | } |
417 | ||
418 | return NULL; | |
419 | } | |
420 | ||
31198773 FXC |
421 | |
422 | /* Opens file for reading, searching through the include directories | |
423 | given if necessary. If the include_cwd argument is true, we try | |
424 | to open the file in the current directory first. */ | |
425 | ||
426 | FILE * | |
427 | gfc_open_included_file (const char *name, bool include_cwd, bool module) | |
428 | { | |
d8ddea40 | 429 | FILE *f = NULL; |
e01f74e0 | 430 | |
d8ddea40 | 431 | if (IS_ABSOLUTE_PATH (name) || include_cwd) |
31198773 FXC |
432 | { |
433 | f = gfc_open_file (name); | |
d8ddea40 DF |
434 | if (f && gfc_cpp_makedep ()) |
435 | gfc_cpp_add_dep (name, false); | |
31198773 FXC |
436 | } |
437 | ||
d8ddea40 DF |
438 | if (!f) |
439 | f = open_included_file (name, include_dirs, module, false); | |
440 | ||
441 | return f; | |
31198773 FXC |
442 | } |
443 | ||
444 | FILE * | |
445 | gfc_open_intrinsic_module (const char *name) | |
446 | { | |
d8ddea40 DF |
447 | FILE *f = NULL; |
448 | ||
e01f74e0 | 449 | if (IS_ABSOLUTE_PATH (name)) |
d8ddea40 DF |
450 | { |
451 | f = gfc_open_file (name); | |
452 | if (f && gfc_cpp_makedep ()) | |
453 | gfc_cpp_add_dep (name, true); | |
454 | } | |
455 | ||
456 | if (!f) | |
457 | f = open_included_file (name, intrinsic_modules_dirs, true, true); | |
e01f74e0 | 458 | |
d8ddea40 | 459 | return f; |
31198773 FXC |
460 | } |
461 | ||
edf1eac2 | 462 | |
6de9cd9a DN |
463 | /* Test to see if we're at the end of the main source file. */ |
464 | ||
465 | int | |
466 | gfc_at_end (void) | |
467 | { | |
6de9cd9a DN |
468 | return end_flag; |
469 | } | |
470 | ||
471 | ||
472 | /* Test to see if we're at the end of the current file. */ | |
473 | ||
474 | int | |
475 | gfc_at_eof (void) | |
476 | { | |
6de9cd9a DN |
477 | if (gfc_at_end ()) |
478 | return 1; | |
479 | ||
d4fa05b9 | 480 | if (line_head == NULL) |
6de9cd9a DN |
481 | return 1; /* Null file */ |
482 | ||
63645982 | 483 | if (gfc_current_locus.lb == NULL) |
6de9cd9a DN |
484 | return 1; |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | ||
490 | /* Test to see if we're at the beginning of a new line. */ | |
491 | ||
492 | int | |
493 | gfc_at_bol (void) | |
494 | { | |
6de9cd9a DN |
495 | if (gfc_at_eof ()) |
496 | return 1; | |
497 | ||
63645982 | 498 | return (gfc_current_locus.nextc == gfc_current_locus.lb->line); |
6de9cd9a DN |
499 | } |
500 | ||
501 | ||
502 | /* Test to see if we're at the end of a line. */ | |
503 | ||
504 | int | |
505 | gfc_at_eol (void) | |
506 | { | |
6de9cd9a DN |
507 | if (gfc_at_eof ()) |
508 | return 1; | |
509 | ||
63645982 | 510 | return (*gfc_current_locus.nextc == '\0'); |
6de9cd9a DN |
511 | } |
512 | ||
60332588 | 513 | static void |
1b271c9b | 514 | add_file_change (const char *filename, int line) |
60332588 | 515 | { |
1b271c9b JJ |
516 | if (file_changes_count == file_changes_allocated) |
517 | { | |
518 | if (file_changes_allocated) | |
519 | file_changes_allocated *= 2; | |
520 | else | |
521 | file_changes_allocated = 16; | |
ece3f663 KG |
522 | file_changes = XRESIZEVEC (struct gfc_file_change, file_changes, |
523 | file_changes_allocated); | |
1b271c9b JJ |
524 | } |
525 | file_changes[file_changes_count].filename = filename; | |
526 | file_changes[file_changes_count].lb = NULL; | |
527 | file_changes[file_changes_count++].line = line; | |
528 | } | |
60332588 | 529 | |
1b271c9b JJ |
530 | static void |
531 | report_file_change (gfc_linebuf *lb) | |
532 | { | |
533 | size_t c = file_changes_cur; | |
534 | while (c < file_changes_count | |
535 | && file_changes[c].lb == lb) | |
536 | { | |
537 | if (file_changes[c].filename) | |
538 | (*debug_hooks->start_source_file) (file_changes[c].line, | |
539 | file_changes[c].filename); | |
540 | else | |
541 | (*debug_hooks->end_source_file) (file_changes[c].line); | |
542 | ++c; | |
543 | } | |
544 | file_changes_cur = c; | |
60332588 JJ |
545 | } |
546 | ||
547 | void | |
548 | gfc_start_source_files (void) | |
549 | { | |
550 | /* If the debugger wants the name of the main source file, | |
551 | we give it. */ | |
552 | if (debug_hooks->start_end_main_source_file) | |
553 | (*debug_hooks->start_source_file) (0, gfc_source_file); | |
554 | ||
1b271c9b JJ |
555 | file_changes_cur = 0; |
556 | report_file_change (gfc_current_locus.lb); | |
60332588 JJ |
557 | } |
558 | ||
559 | void | |
560 | gfc_end_source_files (void) | |
561 | { | |
1b271c9b | 562 | report_file_change (NULL); |
60332588 JJ |
563 | |
564 | if (debug_hooks->start_end_main_source_file) | |
565 | (*debug_hooks->end_source_file) (0); | |
566 | } | |
6de9cd9a DN |
567 | |
568 | /* Advance the current line pointer to the next line. */ | |
569 | ||
570 | void | |
571 | gfc_advance_line (void) | |
572 | { | |
6de9cd9a | 573 | if (gfc_at_end ()) |
4a58b9ad | 574 | return; |
6de9cd9a | 575 | |
63645982 | 576 | if (gfc_current_locus.lb == NULL) |
6de9cd9a | 577 | { |
d4fa05b9 TS |
578 | end_flag = 1; |
579 | return; | |
580 | } | |
6de9cd9a | 581 | |
9e8a6720 | 582 | if (gfc_current_locus.lb->next |
60332588 | 583 | && !gfc_current_locus.lb->next->dbg_emitted) |
9e8a6720 | 584 | { |
1b271c9b | 585 | report_file_change (gfc_current_locus.lb->next); |
60332588 | 586 | gfc_current_locus.lb->next->dbg_emitted = true; |
9e8a6720 FXC |
587 | } |
588 | ||
63645982 | 589 | gfc_current_locus.lb = gfc_current_locus.lb->next; |
6de9cd9a | 590 | |
edf1eac2 | 591 | if (gfc_current_locus.lb != NULL) |
63645982 | 592 | gfc_current_locus.nextc = gfc_current_locus.lb->line; |
d4fa05b9 TS |
593 | else |
594 | { | |
63645982 | 595 | gfc_current_locus.nextc = NULL; |
d4fa05b9 TS |
596 | end_flag = 1; |
597 | } | |
6de9cd9a DN |
598 | } |
599 | ||
600 | ||
601 | /* Get the next character from the input, advancing gfc_current_file's | |
602 | locus. When we hit the end of the line or the end of the file, we | |
603 | start returning a '\n' in order to complete the current statement. | |
604 | No Fortran line conventions are implemented here. | |
605 | ||
606 | Requiring explicit advances to the next line prevents the parse | |
607 | pointer from being on the wrong line if the current statement ends | |
608 | prematurely. */ | |
609 | ||
8fc541d3 | 610 | static gfc_char_t |
6de9cd9a DN |
611 | next_char (void) |
612 | { | |
8fc541d3 | 613 | gfc_char_t c; |
d4fa05b9 | 614 | |
63645982 | 615 | if (gfc_current_locus.nextc == NULL) |
6de9cd9a DN |
616 | return '\n'; |
617 | ||
8fc541d3 | 618 | c = *gfc_current_locus.nextc++; |
6de9cd9a DN |
619 | if (c == '\0') |
620 | { | |
63645982 | 621 | gfc_current_locus.nextc--; /* Remain on this line. */ |
6de9cd9a DN |
622 | c = '\n'; |
623 | } | |
624 | ||
625 | return c; | |
626 | } | |
627 | ||
edf1eac2 | 628 | |
6de9cd9a DN |
629 | /* Skip a comment. When we come here the parse pointer is positioned |
630 | immediately after the comment character. If we ever implement | |
9cd38d51 | 631 | compiler directives within comments, here is where we parse the |
6de9cd9a DN |
632 | directive. */ |
633 | ||
634 | static void | |
635 | skip_comment_line (void) | |
636 | { | |
8fc541d3 | 637 | gfc_char_t c; |
6de9cd9a DN |
638 | |
639 | do | |
640 | { | |
641 | c = next_char (); | |
642 | } | |
643 | while (c != '\n'); | |
644 | ||
645 | gfc_advance_line (); | |
646 | } | |
647 | ||
648 | ||
9e8a6720 FXC |
649 | int |
650 | gfc_define_undef_line (void) | |
651 | { | |
8fc541d3 FXC |
652 | char *tmp; |
653 | ||
9e8a6720 | 654 | /* All lines beginning with '#' are either #define or #undef. */ |
8fc541d3 | 655 | if (debug_info_level != DINFO_LEVEL_VERBOSE || gfc_peek_ascii_char () != '#') |
9e8a6720 FXC |
656 | return 0; |
657 | ||
8fc541d3 FXC |
658 | if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0) |
659 | { | |
00660189 | 660 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1); |
8fc541d3 FXC |
661 | (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb), |
662 | tmp); | |
cede9502 | 663 | free (tmp); |
8fc541d3 | 664 | } |
9e8a6720 | 665 | |
8fc541d3 FXC |
666 | if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0) |
667 | { | |
00660189 | 668 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1); |
8fc541d3 FXC |
669 | (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb), |
670 | tmp); | |
cede9502 | 671 | free (tmp); |
8fc541d3 | 672 | } |
9e8a6720 FXC |
673 | |
674 | /* Skip the rest of the line. */ | |
675 | skip_comment_line (); | |
676 | ||
677 | return 1; | |
678 | } | |
679 | ||
680 | ||
08a6b8e0 TB |
681 | /* Return true if GCC$ was matched. */ |
682 | static bool | |
683 | skip_gcc_attribute (locus start) | |
684 | { | |
685 | bool r = false; | |
686 | char c; | |
687 | locus old_loc = gfc_current_locus; | |
688 | ||
689 | if ((c = next_char ()) == 'g' || c == 'G') | |
690 | if ((c = next_char ()) == 'c' || c == 'C') | |
691 | if ((c = next_char ()) == 'c' || c == 'C') | |
692 | if ((c = next_char ()) == '$') | |
693 | r = true; | |
694 | ||
695 | if (r == false) | |
696 | gfc_current_locus = old_loc; | |
697 | else | |
698 | { | |
699 | gcc_attribute_flag = 1; | |
700 | gcc_attribute_locus = old_loc; | |
701 | gfc_current_locus = start; | |
702 | } | |
703 | ||
704 | return r; | |
705 | } | |
706 | ||
707 | ||
708 | ||
6de9cd9a | 709 | /* Comment lines are null lines, lines containing only blanks or lines |
0d3abf6f JJ |
710 | on which the first nonblank line is a '!'. |
711 | Return true if !$ openmp conditional compilation sentinel was | |
712 | seen. */ | |
6de9cd9a | 713 | |
0d3abf6f | 714 | static bool |
6de9cd9a DN |
715 | skip_free_comments (void) |
716 | { | |
717 | locus start; | |
8fc541d3 | 718 | gfc_char_t c; |
6c7a4dfd | 719 | int at_bol; |
6de9cd9a DN |
720 | |
721 | for (;;) | |
722 | { | |
6c7a4dfd | 723 | at_bol = gfc_at_bol (); |
63645982 | 724 | start = gfc_current_locus; |
6de9cd9a DN |
725 | if (gfc_at_eof ()) |
726 | break; | |
727 | ||
728 | do | |
6c7a4dfd | 729 | c = next_char (); |
6de9cd9a DN |
730 | while (gfc_is_whitespace (c)); |
731 | ||
732 | if (c == '\n') | |
733 | { | |
734 | gfc_advance_line (); | |
735 | continue; | |
736 | } | |
737 | ||
738 | if (c == '!') | |
739 | { | |
08a6b8e0 TB |
740 | /* Keep the !GCC$ line. */ |
741 | if (at_bol && skip_gcc_attribute (start)) | |
742 | return false; | |
743 | ||
6c7a4dfd JJ |
744 | /* If -fopenmp, we need to handle here 2 things: |
745 | 1) don't treat !$omp as comments, but directives | |
746 | 2) handle OpenMP conditional compilation, where | |
747 | !$ should be treated as 2 spaces (for initial lines | |
748 | only if followed by space). */ | |
e3339d0f | 749 | if (gfc_option.gfc_flag_openmp && at_bol) |
6c7a4dfd JJ |
750 | { |
751 | locus old_loc = gfc_current_locus; | |
752 | if (next_char () == '$') | |
753 | { | |
754 | c = next_char (); | |
755 | if (c == 'o' || c == 'O') | |
756 | { | |
757 | if (((c = next_char ()) == 'm' || c == 'M') | |
9fa6cfec | 758 | && ((c = next_char ()) == 'p' || c == 'P')) |
6c7a4dfd | 759 | { |
a68ab351 JJ |
760 | if ((c = next_char ()) == ' ' || c == '\t' |
761 | || continue_flag) | |
6c7a4dfd | 762 | { |
9fa6cfec TB |
763 | while (gfc_is_whitespace (c)) |
764 | c = next_char (); | |
765 | if (c != '\n' && c != '!') | |
766 | { | |
767 | openmp_flag = 1; | |
768 | openmp_locus = old_loc; | |
769 | gfc_current_locus = start; | |
770 | return false; | |
771 | } | |
6c7a4dfd | 772 | } |
9fa6cfec TB |
773 | else |
774 | gfc_warning_now ("!$OMP at %C starts a commented " | |
775 | "line as it neither is followed " | |
776 | "by a space nor is a " | |
777 | "continuation line"); | |
6c7a4dfd JJ |
778 | } |
779 | gfc_current_locus = old_loc; | |
780 | next_char (); | |
781 | c = next_char (); | |
782 | } | |
a68ab351 | 783 | if (continue_flag || c == ' ' || c == '\t') |
6c7a4dfd JJ |
784 | { |
785 | gfc_current_locus = old_loc; | |
786 | next_char (); | |
b30c6a0d | 787 | openmp_flag = 0; |
0d3abf6f | 788 | return true; |
6c7a4dfd JJ |
789 | } |
790 | } | |
791 | gfc_current_locus = old_loc; | |
792 | } | |
6de9cd9a DN |
793 | skip_comment_line (); |
794 | continue; | |
795 | } | |
796 | ||
797 | break; | |
798 | } | |
799 | ||
6c7a4dfd JJ |
800 | if (openmp_flag && at_bol) |
801 | openmp_flag = 0; | |
08a6b8e0 TB |
802 | |
803 | gcc_attribute_flag = 0; | |
63645982 | 804 | gfc_current_locus = start; |
0d3abf6f | 805 | return false; |
6de9cd9a DN |
806 | } |
807 | ||
808 | ||
809 | /* Skip comment lines in fixed source mode. We have the same rules as | |
810 | in skip_free_comment(), except that we can have a 'c', 'C' or '*' | |
e0bcf78c TS |
811 | in column 1, and a '!' cannot be in column 6. Also, we deal with |
812 | lines with 'd' or 'D' in column 1, if the user requested this. */ | |
6de9cd9a DN |
813 | |
814 | static void | |
815 | skip_fixed_comments (void) | |
816 | { | |
817 | locus start; | |
818 | int col; | |
8fc541d3 | 819 | gfc_char_t c; |
6de9cd9a | 820 | |
6c7a4dfd JJ |
821 | if (! gfc_at_bol ()) |
822 | { | |
823 | start = gfc_current_locus; | |
824 | if (! gfc_at_eof ()) | |
825 | { | |
826 | do | |
827 | c = next_char (); | |
828 | while (gfc_is_whitespace (c)); | |
829 | ||
830 | if (c == '\n') | |
831 | gfc_advance_line (); | |
832 | else if (c == '!') | |
833 | skip_comment_line (); | |
834 | } | |
835 | ||
836 | if (! gfc_at_bol ()) | |
837 | { | |
838 | gfc_current_locus = start; | |
839 | return; | |
840 | } | |
841 | } | |
842 | ||
6de9cd9a DN |
843 | for (;;) |
844 | { | |
63645982 | 845 | start = gfc_current_locus; |
6de9cd9a DN |
846 | if (gfc_at_eof ()) |
847 | break; | |
848 | ||
849 | c = next_char (); | |
850 | if (c == '\n') | |
851 | { | |
852 | gfc_advance_line (); | |
853 | continue; | |
854 | } | |
855 | ||
856 | if (c == '!' || c == 'c' || c == 'C' || c == '*') | |
857 | { | |
08a6b8e0 TB |
858 | if (skip_gcc_attribute (start)) |
859 | { | |
860 | /* Canonicalize to *$omp. */ | |
861 | *start.nextc = '*'; | |
862 | return; | |
863 | } | |
864 | ||
6c7a4dfd JJ |
865 | /* If -fopenmp, we need to handle here 2 things: |
866 | 1) don't treat !$omp|c$omp|*$omp as comments, but directives | |
867 | 2) handle OpenMP conditional compilation, where | |
868 | !$|c$|*$ should be treated as 2 spaces if the characters | |
869 | in columns 3 to 6 are valid fixed form label columns | |
870 | characters. */ | |
f449022d JD |
871 | if (gfc_current_locus.lb != NULL |
872 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
873 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
874 | ||
e3339d0f | 875 | if (gfc_option.gfc_flag_openmp) |
6c7a4dfd JJ |
876 | { |
877 | if (next_char () == '$') | |
878 | { | |
879 | c = next_char (); | |
880 | if (c == 'o' || c == 'O') | |
881 | { | |
882 | if (((c = next_char ()) == 'm' || c == 'M') | |
883 | && ((c = next_char ()) == 'p' || c == 'P')) | |
884 | { | |
885 | c = next_char (); | |
886 | if (c != '\n' | |
887 | && ((openmp_flag && continue_flag) | |
a68ab351 | 888 | || c == ' ' || c == '\t' || c == '0')) |
6c7a4dfd | 889 | { |
a68ab351 | 890 | do |
6c7a4dfd | 891 | c = next_char (); |
a68ab351 | 892 | while (gfc_is_whitespace (c)); |
6c7a4dfd JJ |
893 | if (c != '\n' && c != '!') |
894 | { | |
895 | /* Canonicalize to *$omp. */ | |
896 | *start.nextc = '*'; | |
897 | openmp_flag = 1; | |
898 | gfc_current_locus = start; | |
899 | return; | |
900 | } | |
901 | } | |
902 | } | |
903 | } | |
904 | else | |
905 | { | |
906 | int digit_seen = 0; | |
907 | ||
908 | for (col = 3; col < 6; col++, c = next_char ()) | |
909 | if (c == ' ') | |
910 | continue; | |
a68ab351 JJ |
911 | else if (c == '\t') |
912 | { | |
913 | col = 6; | |
914 | break; | |
915 | } | |
6c7a4dfd JJ |
916 | else if (c < '0' || c > '9') |
917 | break; | |
918 | else | |
919 | digit_seen = 1; | |
920 | ||
921 | if (col == 6 && c != '\n' | |
922 | && ((continue_flag && !digit_seen) | |
a68ab351 | 923 | || c == ' ' || c == '\t' || c == '0')) |
6c7a4dfd JJ |
924 | { |
925 | gfc_current_locus = start; | |
926 | start.nextc[0] = ' '; | |
927 | start.nextc[1] = ' '; | |
928 | continue; | |
929 | } | |
930 | } | |
931 | } | |
932 | gfc_current_locus = start; | |
933 | } | |
6de9cd9a DN |
934 | skip_comment_line (); |
935 | continue; | |
936 | } | |
937 | ||
e0bcf78c TS |
938 | if (gfc_option.flag_d_lines != -1 && (c == 'd' || c == 'D')) |
939 | { | |
940 | if (gfc_option.flag_d_lines == 0) | |
941 | { | |
942 | skip_comment_line (); | |
943 | continue; | |
944 | } | |
945 | else | |
946 | *start.nextc = c = ' '; | |
947 | } | |
948 | ||
6de9cd9a | 949 | col = 1; |
e0bcf78c TS |
950 | |
951 | while (gfc_is_whitespace (c)) | |
6de9cd9a DN |
952 | { |
953 | c = next_char (); | |
954 | col++; | |
955 | } | |
6de9cd9a DN |
956 | |
957 | if (c == '\n') | |
958 | { | |
959 | gfc_advance_line (); | |
960 | continue; | |
961 | } | |
962 | ||
963 | if (col != 6 && c == '!') | |
964 | { | |
f449022d JD |
965 | if (gfc_current_locus.lb != NULL |
966 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
967 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
6de9cd9a DN |
968 | skip_comment_line (); |
969 | continue; | |
970 | } | |
971 | ||
972 | break; | |
973 | } | |
974 | ||
6c7a4dfd | 975 | openmp_flag = 0; |
08a6b8e0 | 976 | gcc_attribute_flag = 0; |
63645982 | 977 | gfc_current_locus = start; |
6de9cd9a DN |
978 | } |
979 | ||
980 | ||
6c7a4dfd | 981 | /* Skips the current line if it is a comment. */ |
6de9cd9a DN |
982 | |
983 | void | |
984 | gfc_skip_comments (void) | |
985 | { | |
6c7a4dfd | 986 | if (gfc_current_form == FORM_FREE) |
6de9cd9a DN |
987 | skip_free_comments (); |
988 | else | |
989 | skip_fixed_comments (); | |
990 | } | |
991 | ||
992 | ||
993 | /* Get the next character from the input, taking continuation lines | |
994 | and end-of-line comments into account. This implies that comment | |
995 | lines between continued lines must be eaten here. For higher-level | |
996 | subroutines, this flattens continued lines into a single logical | |
997 | line. The in_string flag denotes whether we're inside a character | |
998 | context or not. */ | |
999 | ||
8fc541d3 | 1000 | gfc_char_t |
696abb30 | 1001 | gfc_next_char_literal (gfc_instring in_string) |
6de9cd9a DN |
1002 | { |
1003 | locus old_loc; | |
8fc541d3 FXC |
1004 | int i, prev_openmp_flag; |
1005 | gfc_char_t c; | |
6de9cd9a DN |
1006 | |
1007 | continue_flag = 0; | |
1008 | ||
1009 | restart: | |
1010 | c = next_char (); | |
1011 | if (gfc_at_end ()) | |
5a06474c JD |
1012 | { |
1013 | continue_count = 0; | |
1014 | return c; | |
1015 | } | |
6de9cd9a | 1016 | |
d4fa05b9 | 1017 | if (gfc_current_form == FORM_FREE) |
6de9cd9a | 1018 | { |
0d3abf6f JJ |
1019 | bool openmp_cond_flag; |
1020 | ||
6de9cd9a DN |
1021 | if (!in_string && c == '!') |
1022 | { | |
08a6b8e0 TB |
1023 | if (gcc_attribute_flag |
1024 | && memcmp (&gfc_current_locus, &gcc_attribute_locus, | |
1025 | sizeof (gfc_current_locus)) == 0) | |
1026 | goto done; | |
1027 | ||
6c7a4dfd JJ |
1028 | if (openmp_flag |
1029 | && memcmp (&gfc_current_locus, &openmp_locus, | |
1030 | sizeof (gfc_current_locus)) == 0) | |
1031 | goto done; | |
1032 | ||
6de9cd9a DN |
1033 | /* This line can't be continued */ |
1034 | do | |
1035 | { | |
1036 | c = next_char (); | |
1037 | } | |
1038 | while (c != '\n'); | |
1039 | ||
a34938be RG |
1040 | /* Avoid truncation warnings for comment ending lines. */ |
1041 | gfc_current_locus.lb->truncated = 0; | |
1042 | ||
6de9cd9a DN |
1043 | goto done; |
1044 | } | |
1045 | ||
ac64eec4 JD |
1046 | /* Check to see if the continuation line was truncated. */ |
1047 | if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL | |
1048 | && gfc_current_locus.lb->truncated) | |
1049 | { | |
1050 | int maxlen = gfc_option.free_line_length; | |
1051 | gfc_current_locus.lb->truncated = 0; | |
1052 | gfc_current_locus.nextc += maxlen; | |
1053 | gfc_warning_now ("Line truncated at %L", &gfc_current_locus); | |
1054 | gfc_current_locus.nextc -= maxlen; | |
1055 | } | |
1056 | ||
6de9cd9a DN |
1057 | if (c != '&') |
1058 | goto done; | |
1059 | ||
1060 | /* If the next nonblank character is a ! or \n, we've got a | |
6c7a4dfd | 1061 | continuation line. */ |
63645982 | 1062 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1063 | |
1064 | c = next_char (); | |
1065 | while (gfc_is_whitespace (c)) | |
1066 | c = next_char (); | |
1067 | ||
1068 | /* Character constants to be continued cannot have commentary | |
6c7a4dfd | 1069 | after the '&'. */ |
6de9cd9a DN |
1070 | |
1071 | if (in_string && c != '\n') | |
1072 | { | |
63645982 | 1073 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1074 | c = '&'; |
1075 | goto done; | |
1076 | } | |
1077 | ||
1078 | if (c != '!' && c != '\n') | |
1079 | { | |
63645982 | 1080 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1081 | c = '&'; |
1082 | goto done; | |
1083 | } | |
1084 | ||
6c7a4dfd | 1085 | prev_openmp_flag = openmp_flag; |
6de9cd9a DN |
1086 | continue_flag = 1; |
1087 | if (c == '!') | |
1088 | skip_comment_line (); | |
1089 | else | |
1090 | gfc_advance_line (); | |
0267ffdc JD |
1091 | |
1092 | if (gfc_at_eof()) | |
1093 | goto not_continuation; | |
6de9cd9a | 1094 | |
5a06474c JD |
1095 | /* We've got a continuation line. If we are on the very next line after |
1096 | the last continuation, increment the continuation line count and | |
1097 | check whether the limit has been exceeded. */ | |
5ffeb913 | 1098 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) |
5a06474c JD |
1099 | { |
1100 | if (++continue_count == gfc_option.max_continue_free) | |
1101 | { | |
edf1eac2 SK |
1102 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) |
1103 | gfc_warning ("Limit of %d continuations exceeded in " | |
1104 | "statement at %C", gfc_option.max_continue_free); | |
5a06474c JD |
1105 | } |
1106 | } | |
5a06474c JD |
1107 | |
1108 | /* Now find where it continues. First eat any comment lines. */ | |
0d3abf6f | 1109 | openmp_cond_flag = skip_free_comments (); |
6de9cd9a | 1110 | |
f449022d JD |
1111 | if (gfc_current_locus.lb != NULL |
1112 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1113 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1114 | ||
6c7a4dfd JJ |
1115 | if (prev_openmp_flag != openmp_flag) |
1116 | { | |
1117 | gfc_current_locus = old_loc; | |
1118 | openmp_flag = prev_openmp_flag; | |
1119 | c = '&'; | |
1120 | goto done; | |
1121 | } | |
1122 | ||
6de9cd9a | 1123 | /* Now that we have a non-comment line, probe ahead for the |
6c7a4dfd JJ |
1124 | first non-whitespace character. If it is another '&', then |
1125 | reading starts at the next character, otherwise we must back | |
1126 | up to where the whitespace started and resume from there. */ | |
6de9cd9a | 1127 | |
63645982 | 1128 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1129 | |
1130 | c = next_char (); | |
1131 | while (gfc_is_whitespace (c)) | |
1132 | c = next_char (); | |
1133 | ||
6c7a4dfd JJ |
1134 | if (openmp_flag) |
1135 | { | |
1136 | for (i = 0; i < 5; i++, c = next_char ()) | |
1137 | { | |
8fc541d3 | 1138 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$omp"[i]); |
6c7a4dfd JJ |
1139 | if (i == 4) |
1140 | old_loc = gfc_current_locus; | |
1141 | } | |
1142 | while (gfc_is_whitespace (c)) | |
1143 | c = next_char (); | |
1144 | } | |
1145 | ||
6de9cd9a | 1146 | if (c != '&') |
3fbab549 | 1147 | { |
5a06474c JD |
1148 | if (in_string) |
1149 | { | |
5a06474c | 1150 | gfc_current_locus.nextc--; |
696abb30 JD |
1151 | if (gfc_option.warn_ampersand && in_string == INSTRING_WARN) |
1152 | gfc_warning ("Missing '&' in continued character " | |
1153 | "constant at %C"); | |
5a06474c | 1154 | } |
0d3abf6f JJ |
1155 | /* Both !$omp and !$ -fopenmp continuation lines have & on the |
1156 | continuation line only optionally. */ | |
1157 | else if (openmp_flag || openmp_cond_flag) | |
1158 | gfc_current_locus.nextc--; | |
5a06474c JD |
1159 | else |
1160 | { | |
1161 | c = ' '; | |
1162 | gfc_current_locus = old_loc; | |
1163 | goto done; | |
1164 | } | |
3fbab549 | 1165 | } |
6de9cd9a | 1166 | } |
b823d9eb | 1167 | else /* Fixed form. */ |
6de9cd9a DN |
1168 | { |
1169 | /* Fixed form continuation. */ | |
1170 | if (!in_string && c == '!') | |
1171 | { | |
1172 | /* Skip comment at end of line. */ | |
1173 | do | |
1174 | { | |
1175 | c = next_char (); | |
1176 | } | |
1177 | while (c != '\n'); | |
a34938be RG |
1178 | |
1179 | /* Avoid truncation warnings for comment ending lines. */ | |
1180 | gfc_current_locus.lb->truncated = 0; | |
6de9cd9a DN |
1181 | } |
1182 | ||
1183 | if (c != '\n') | |
1184 | goto done; | |
1185 | ||
9cd38d51 JD |
1186 | /* Check to see if the continuation line was truncated. */ |
1187 | if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL | |
1188 | && gfc_current_locus.lb->truncated) | |
1189 | { | |
1190 | gfc_current_locus.lb->truncated = 0; | |
1191 | gfc_warning_now ("Line truncated at %L", &gfc_current_locus); | |
1192 | } | |
1193 | ||
6c7a4dfd | 1194 | prev_openmp_flag = openmp_flag; |
6de9cd9a | 1195 | continue_flag = 1; |
63645982 | 1196 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1197 | |
1198 | gfc_advance_line (); | |
0d3abf6f | 1199 | skip_fixed_comments (); |
6de9cd9a DN |
1200 | |
1201 | /* See if this line is a continuation line. */ | |
6c7a4dfd | 1202 | if (openmp_flag != prev_openmp_flag) |
6de9cd9a | 1203 | { |
6c7a4dfd JJ |
1204 | openmp_flag = prev_openmp_flag; |
1205 | goto not_continuation; | |
6de9cd9a DN |
1206 | } |
1207 | ||
6c7a4dfd JJ |
1208 | if (!openmp_flag) |
1209 | for (i = 0; i < 5; i++) | |
1210 | { | |
1211 | c = next_char (); | |
1212 | if (c != ' ') | |
1213 | goto not_continuation; | |
1214 | } | |
1215 | else | |
1216 | for (i = 0; i < 5; i++) | |
1217 | { | |
1218 | c = next_char (); | |
8fc541d3 | 1219 | if (gfc_wide_tolower (c) != (unsigned char) "*$omp"[i]) |
6c7a4dfd JJ |
1220 | goto not_continuation; |
1221 | } | |
1222 | ||
6de9cd9a | 1223 | c = next_char (); |
6c7a4dfd | 1224 | if (c == '0' || c == ' ' || c == '\n') |
6de9cd9a | 1225 | goto not_continuation; |
5a06474c JD |
1226 | |
1227 | /* We've got a continuation line. If we are on the very next line after | |
1228 | the last continuation, increment the continuation line count and | |
1229 | check whether the limit has been exceeded. */ | |
5ffeb913 | 1230 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) |
5a06474c JD |
1231 | { |
1232 | if (++continue_count == gfc_option.max_continue_fixed) | |
1233 | { | |
edf1eac2 SK |
1234 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) |
1235 | gfc_warning ("Limit of %d continuations exceeded in " | |
1236 | "statement at %C", | |
1237 | gfc_option.max_continue_fixed); | |
5a06474c JD |
1238 | } |
1239 | } | |
1240 | ||
f449022d JD |
1241 | if (gfc_current_locus.lb != NULL |
1242 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
5ffeb913 | 1243 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); |
6de9cd9a DN |
1244 | } |
1245 | ||
1246 | /* Ready to read first character of continuation line, which might | |
1247 | be another continuation line! */ | |
1248 | goto restart; | |
1249 | ||
1250 | not_continuation: | |
1251 | c = '\n'; | |
63645982 | 1252 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1253 | |
1254 | done: | |
5a06474c JD |
1255 | if (c == '\n') |
1256 | continue_count = 0; | |
6de9cd9a DN |
1257 | continue_flag = 0; |
1258 | return c; | |
1259 | } | |
1260 | ||
1261 | ||
1262 | /* Get the next character of input, folded to lowercase. In fixed | |
1263 | form mode, we also ignore spaces. When matcher subroutines are | |
1264 | parsing character literals, they have to call | |
1265 | gfc_next_char_literal(). */ | |
1266 | ||
8fc541d3 | 1267 | gfc_char_t |
6de9cd9a DN |
1268 | gfc_next_char (void) |
1269 | { | |
8fc541d3 | 1270 | gfc_char_t c; |
6de9cd9a DN |
1271 | |
1272 | do | |
1273 | { | |
696abb30 | 1274 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a | 1275 | } |
d4fa05b9 | 1276 | while (gfc_current_form == FORM_FIXED && gfc_is_whitespace (c)); |
6de9cd9a | 1277 | |
8fc541d3 | 1278 | return gfc_wide_tolower (c); |
6de9cd9a DN |
1279 | } |
1280 | ||
8fc541d3 FXC |
1281 | char |
1282 | gfc_next_ascii_char (void) | |
1283 | { | |
1284 | gfc_char_t c = gfc_next_char (); | |
6de9cd9a | 1285 | |
8fc541d3 FXC |
1286 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c |
1287 | : (unsigned char) UCHAR_MAX); | |
1288 | } | |
1289 | ||
1290 | ||
1291 | gfc_char_t | |
6de9cd9a DN |
1292 | gfc_peek_char (void) |
1293 | { | |
1294 | locus old_loc; | |
8fc541d3 | 1295 | gfc_char_t c; |
6de9cd9a | 1296 | |
63645982 | 1297 | old_loc = gfc_current_locus; |
6de9cd9a | 1298 | c = gfc_next_char (); |
63645982 | 1299 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1300 | |
1301 | return c; | |
1302 | } | |
1303 | ||
1304 | ||
8fc541d3 FXC |
1305 | char |
1306 | gfc_peek_ascii_char (void) | |
1307 | { | |
1308 | gfc_char_t c = gfc_peek_char (); | |
1309 | ||
1310 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c | |
1311 | : (unsigned char) UCHAR_MAX); | |
1312 | } | |
1313 | ||
1314 | ||
6de9cd9a DN |
1315 | /* Recover from an error. We try to get past the current statement |
1316 | and get lined up for the next. The next statement follows a '\n' | |
1317 | or a ';'. We also assume that we are not within a character | |
1318 | constant, and deal with finding a '\'' or '"'. */ | |
1319 | ||
1320 | void | |
1321 | gfc_error_recovery (void) | |
1322 | { | |
8fc541d3 | 1323 | gfc_char_t c, delim; |
6de9cd9a DN |
1324 | |
1325 | if (gfc_at_eof ()) | |
1326 | return; | |
1327 | ||
1328 | for (;;) | |
1329 | { | |
1330 | c = gfc_next_char (); | |
1331 | if (c == '\n' || c == ';') | |
1332 | break; | |
1333 | ||
1334 | if (c != '\'' && c != '"') | |
1335 | { | |
1336 | if (gfc_at_eof ()) | |
1337 | break; | |
1338 | continue; | |
1339 | } | |
1340 | delim = c; | |
1341 | ||
1342 | for (;;) | |
1343 | { | |
1344 | c = next_char (); | |
1345 | ||
1346 | if (c == delim) | |
1347 | break; | |
1348 | if (c == '\n') | |
ba1defa5 | 1349 | return; |
6de9cd9a DN |
1350 | if (c == '\\') |
1351 | { | |
1352 | c = next_char (); | |
1353 | if (c == '\n') | |
ba1defa5 | 1354 | return; |
6de9cd9a DN |
1355 | } |
1356 | } | |
1357 | if (gfc_at_eof ()) | |
1358 | break; | |
1359 | } | |
6de9cd9a DN |
1360 | } |
1361 | ||
1362 | ||
1363 | /* Read ahead until the next character to be read is not whitespace. */ | |
1364 | ||
1365 | void | |
1366 | gfc_gobble_whitespace (void) | |
1367 | { | |
840bd9f7 | 1368 | static int linenum = 0; |
6de9cd9a | 1369 | locus old_loc; |
8fc541d3 | 1370 | gfc_char_t c; |
6de9cd9a DN |
1371 | |
1372 | do | |
1373 | { | |
63645982 | 1374 | old_loc = gfc_current_locus; |
696abb30 | 1375 | c = gfc_next_char_literal (NONSTRING); |
840bd9f7 SK |
1376 | /* Issue a warning for nonconforming tabs. We keep track of the line |
1377 | number because the Fortran matchers will often back up and the same | |
1378 | line will be scanned multiple times. */ | |
45a82bd9 | 1379 | if (!gfc_option.warn_tabs && c == '\t') |
840bd9f7 | 1380 | { |
45a82bd9 | 1381 | int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location); |
45a82bd9 PB |
1382 | if (cur_linenum != linenum) |
1383 | { | |
1384 | linenum = cur_linenum; | |
1385 | gfc_warning_now ("Nonconforming tab character at %C"); | |
1386 | } | |
840bd9f7 | 1387 | } |
6de9cd9a DN |
1388 | } |
1389 | while (gfc_is_whitespace (c)); | |
1390 | ||
63645982 | 1391 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1392 | } |
1393 | ||
1394 | ||
f56c5d5d TS |
1395 | /* Load a single line into pbuf. |
1396 | ||
1397 | If pbuf points to a NULL pointer, it is allocated. | |
1398 | We truncate lines that are too long, unless we're dealing with | |
1399 | preprocessor lines or if the option -ffixed-line-length-none is set, | |
1400 | in which case we reallocate the buffer to fit the entire line, if | |
1401 | need be. | |
1402 | In fixed mode, we expand a tab that occurs within the statement | |
1403 | label region to expand to spaces that leave the next character in | |
ba1defa5 | 1404 | the source region. |
f2f5443c FXC |
1405 | |
1406 | If first_char is not NULL, it's a pointer to a single char value holding | |
1407 | the first character of the line, which has already been read by the | |
1408 | caller. This avoids the use of ungetc(). | |
1409 | ||
1526c4b5 JD |
1410 | load_line returns whether the line was truncated. |
1411 | ||
1412 | NOTE: The error machinery isn't available at this point, so we can't | |
1413 | easily report line and column numbers consistent with other | |
1414 | parts of gfortran. */ | |
6de9cd9a | 1415 | |
ba1defa5 | 1416 | static int |
f2f5443c | 1417 | load_line (FILE *input, gfc_char_t **pbuf, int *pbuflen, const int *first_char) |
6de9cd9a | 1418 | { |
840bd9f7 | 1419 | static int linenum = 0, current_line = 1; |
d1e3d6ae | 1420 | int c, maxlen, i, preprocessor_flag, buflen = *pbuflen; |
840bd9f7 | 1421 | int trunc_flag = 0, seen_comment = 0; |
ac64eec4 | 1422 | int seen_printable = 0, seen_ampersand = 0, quoted = ' '; |
8fc541d3 | 1423 | gfc_char_t *buffer; |
fd1935d5 | 1424 | bool found_tab = false; |
f56c5d5d | 1425 | |
1dde8683 | 1426 | /* Determine the maximum allowed line length. */ |
f56c5d5d | 1427 | if (gfc_current_form == FORM_FREE) |
1dde8683 | 1428 | maxlen = gfc_option.free_line_length; |
16ab8e74 | 1429 | else if (gfc_current_form == FORM_FIXED) |
1dde8683 | 1430 | maxlen = gfc_option.fixed_line_length; |
f56c5d5d | 1431 | else |
16ab8e74 | 1432 | maxlen = 72; |
f56c5d5d TS |
1433 | |
1434 | if (*pbuf == NULL) | |
1435 | { | |
1dde8683 BM |
1436 | /* Allocate the line buffer, storing its length into buflen. |
1437 | Note that if maxlen==0, indicating that arbitrary-length lines | |
1438 | are allowed, the buffer will be reallocated if this length is | |
1439 | insufficient; since 132 characters is the length of a standard | |
1440 | free-form line, we use that as a starting guess. */ | |
f56c5d5d TS |
1441 | if (maxlen > 0) |
1442 | buflen = maxlen; | |
1443 | else | |
1dde8683 | 1444 | buflen = 132; |
6de9cd9a | 1445 | |
00660189 | 1446 | *pbuf = gfc_get_wide_string (buflen + 1); |
f56c5d5d | 1447 | } |
6de9cd9a DN |
1448 | |
1449 | i = 0; | |
f56c5d5d | 1450 | buffer = *pbuf; |
6de9cd9a | 1451 | |
f2f5443c FXC |
1452 | if (first_char) |
1453 | c = *first_char; | |
1454 | else | |
1455 | c = getc (input); | |
1456 | ||
1457 | /* In order to not truncate preprocessor lines, we have to | |
1458 | remember that this is one. */ | |
1459 | preprocessor_flag = (c == '#' ? 1 : 0); | |
fa841200 | 1460 | |
6de9cd9a DN |
1461 | for (;;) |
1462 | { | |
6de9cd9a DN |
1463 | if (c == EOF) |
1464 | break; | |
f2f5443c | 1465 | |
6de9cd9a | 1466 | if (c == '\n') |
1526c4b5 JD |
1467 | { |
1468 | /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */ | |
1469 | if (gfc_current_form == FORM_FREE | |
c284e499 | 1470 | && !seen_printable && seen_ampersand) |
1526c4b5 JD |
1471 | { |
1472 | if (pedantic) | |
edf1eac2 SK |
1473 | gfc_error_now ("'&' not allowed by itself in line %d", |
1474 | current_line); | |
1526c4b5 | 1475 | else |
edf1eac2 SK |
1476 | gfc_warning_now ("'&' not allowed by itself in line %d", |
1477 | current_line); | |
1526c4b5 JD |
1478 | } |
1479 | break; | |
1480 | } | |
6de9cd9a | 1481 | |
f2f5443c FXC |
1482 | if (c == '\r' || c == '\0') |
1483 | goto next_char; /* Gobble characters. */ | |
6de9cd9a | 1484 | |
1526c4b5 | 1485 | if (c == '&') |
1526c4b5 | 1486 | { |
c284e499 | 1487 | if (seen_ampersand) |
47b0b4fa TB |
1488 | { |
1489 | seen_ampersand = 0; | |
1490 | seen_printable = 1; | |
1491 | } | |
1526c4b5 | 1492 | else |
c284e499 | 1493 | seen_ampersand = 1; |
1526c4b5 JD |
1494 | } |
1495 | ||
bd5db9de | 1496 | if ((c != '&' && c != '!' && c != ' ') || (c == '!' && !seen_ampersand)) |
c284e499 JD |
1497 | seen_printable = 1; |
1498 | ||
840bd9f7 SK |
1499 | /* Is this a fixed-form comment? */ |
1500 | if (gfc_current_form == FORM_FIXED && i == 0 | |
1501 | && (c == '*' || c == 'c' || c == 'd')) | |
1502 | seen_comment = 1; | |
1503 | ||
ac64eec4 JD |
1504 | if (quoted == ' ') |
1505 | { | |
1506 | if (c == '\'' || c == '"') | |
1507 | quoted = c; | |
1508 | } | |
1509 | else if (c == quoted) | |
1510 | quoted = ' '; | |
1511 | ||
1512 | /* Is this a free-form comment? */ | |
1513 | if (c == '!' && quoted == ' ') | |
1514 | seen_comment = 1; | |
1515 | ||
fd1935d5 TB |
1516 | /* Vendor extension: "<tab>1" marks a continuation line. */ |
1517 | if (found_tab) | |
840bd9f7 | 1518 | { |
fd1935d5 TB |
1519 | found_tab = false; |
1520 | if (c >= '1' && c <= '9') | |
1521 | { | |
1522 | *(buffer-1) = c; | |
f2f5443c | 1523 | goto next_char; |
fd1935d5 TB |
1524 | } |
1525 | } | |
1526 | ||
1527 | if (gfc_current_form == FORM_FIXED && c == '\t' && i < 6) | |
1528 | { | |
1529 | found_tab = true; | |
1530 | ||
840bd9f7 SK |
1531 | if (!gfc_option.warn_tabs && seen_comment == 0 |
1532 | && current_line != linenum) | |
1533 | { | |
1534 | linenum = current_line; | |
fd1935d5 TB |
1535 | gfc_warning_now ("Nonconforming tab character in column %d " |
1536 | "of line %d", i+1, linenum); | |
840bd9f7 SK |
1537 | } |
1538 | ||
fd1935d5 | 1539 | while (i < 6) |
6de9cd9a DN |
1540 | { |
1541 | *buffer++ = ' '; | |
1542 | i++; | |
1543 | } | |
1544 | ||
f2f5443c | 1545 | goto next_char; |
6de9cd9a DN |
1546 | } |
1547 | ||
1548 | *buffer++ = c; | |
1549 | i++; | |
1550 | ||
d1e3d6ae | 1551 | if (maxlen == 0 || preprocessor_flag) |
f56c5d5d | 1552 | { |
d1e3d6ae JJ |
1553 | if (i >= buflen) |
1554 | { | |
1555 | /* Reallocate line buffer to double size to hold the | |
3fbab549 | 1556 | overlong line. */ |
d1e3d6ae | 1557 | buflen = buflen * 2; |
ece3f663 | 1558 | *pbuf = XRESIZEVEC (gfc_char_t, *pbuf, (buflen + 1)); |
edf1eac2 | 1559 | buffer = (*pbuf) + i; |
d1e3d6ae | 1560 | } |
f56c5d5d | 1561 | } |
d1e3d6ae | 1562 | else if (i >= maxlen) |
16ab8e74 | 1563 | { |
ac64eec4 JD |
1564 | bool trunc_warn = true; |
1565 | ||
1566 | /* Enhancement, if the very next non-space character is an ampersand | |
1567 | or comment that we would otherwise warn about, don't mark as | |
1568 | truncated. */ | |
1569 | ||
f56c5d5d | 1570 | /* Truncate the rest of the line. */ |
6de9cd9a DN |
1571 | for (;;) |
1572 | { | |
c4da1827 | 1573 | c = getc (input); |
ac64eec4 | 1574 | if (c == '\r' || c == ' ') |
9c747b97 DF |
1575 | continue; |
1576 | ||
6de9cd9a DN |
1577 | if (c == '\n' || c == EOF) |
1578 | break; | |
a34938be | 1579 | |
ac64eec4 JD |
1580 | if (!trunc_warn && c != '!') |
1581 | trunc_warn = true; | |
1582 | ||
32e4257f JD |
1583 | if (trunc_warn && ((gfc_current_form == FORM_FIXED && c == '&') |
1584 | || c == '!')) | |
ac64eec4 JD |
1585 | trunc_warn = false; |
1586 | ||
1587 | if (c == '!') | |
1588 | seen_comment = 1; | |
1589 | ||
1590 | if (trunc_warn && !seen_comment) | |
1591 | trunc_flag = 1; | |
6de9cd9a DN |
1592 | } |
1593 | ||
f2f5443c FXC |
1594 | c = '\n'; |
1595 | continue; | |
6de9cd9a | 1596 | } |
f2f5443c FXC |
1597 | |
1598 | next_char: | |
1599 | c = getc (input); | |
6de9cd9a DN |
1600 | } |
1601 | ||
f56c5d5d TS |
1602 | /* Pad lines to the selected line length in fixed form. */ |
1603 | if (gfc_current_form == FORM_FIXED | |
043c2d9e | 1604 | && gfc_option.fixed_line_length != 0 |
f56c5d5d TS |
1605 | && !preprocessor_flag |
1606 | && c != EOF) | |
043c2d9e BF |
1607 | { |
1608 | while (i++ < maxlen) | |
1609 | *buffer++ = ' '; | |
1610 | } | |
f56c5d5d | 1611 | |
6de9cd9a | 1612 | *buffer = '\0'; |
d1e3d6ae | 1613 | *pbuflen = buflen; |
840bd9f7 | 1614 | current_line++; |
ba1defa5 RG |
1615 | |
1616 | return trunc_flag; | |
6de9cd9a DN |
1617 | } |
1618 | ||
1619 | ||
d4fa05b9 TS |
1620 | /* Get a gfc_file structure, initialize it and add it to |
1621 | the file stack. */ | |
1622 | ||
1623 | static gfc_file * | |
e0bcf78c | 1624 | get_file (const char *name, enum lc_reason reason ATTRIBUTE_UNUSED) |
d4fa05b9 TS |
1625 | { |
1626 | gfc_file *f; | |
1627 | ||
ece3f663 | 1628 | f = XCNEW (gfc_file); |
d4fa05b9 | 1629 | |
ece3f663 | 1630 | f->filename = xstrdup (name); |
d4fa05b9 TS |
1631 | |
1632 | f->next = file_head; | |
1633 | file_head = f; | |
1634 | ||
60332588 | 1635 | f->up = current_file; |
d4fa05b9 | 1636 | if (current_file != NULL) |
1b271c9b | 1637 | f->inclusion_line = current_file->line; |
d4fa05b9 | 1638 | |
5ffeb913 | 1639 | linemap_add (line_table, reason, false, f->filename, 1); |
c8cc8542 | 1640 | |
d4fa05b9 TS |
1641 | return f; |
1642 | } | |
1643 | ||
8fc541d3 | 1644 | |
d4fa05b9 TS |
1645 | /* Deal with a line from the C preprocessor. The |
1646 | initial octothorp has already been seen. */ | |
6de9cd9a DN |
1647 | |
1648 | static void | |
8fc541d3 | 1649 | preprocessor_line (gfc_char_t *c) |
6de9cd9a | 1650 | { |
d4fa05b9 TS |
1651 | bool flag[5]; |
1652 | int i, line; | |
8fc541d3 | 1653 | gfc_char_t *wide_filename; |
d4fa05b9 | 1654 | gfc_file *f; |
2d7c7df6 | 1655 | int escaped, unescape; |
8fc541d3 | 1656 | char *filename; |
6de9cd9a | 1657 | |
d4fa05b9 TS |
1658 | c++; |
1659 | while (*c == ' ' || *c == '\t') | |
1660 | c++; | |
6de9cd9a | 1661 | |
d4fa05b9 | 1662 | if (*c < '0' || *c > '9') |
fa841200 | 1663 | goto bad_cpp_line; |
6de9cd9a | 1664 | |
8fc541d3 | 1665 | line = wide_atoi (c); |
d4fa05b9 | 1666 | |
8fc541d3 | 1667 | c = wide_strchr (c, ' '); |
fa841200 | 1668 | if (c == NULL) |
4c3a6ca1 JJ |
1669 | { |
1670 | /* No file name given. Set new line number. */ | |
1671 | current_file->line = line; | |
1672 | return; | |
1673 | } | |
d7d528c8 ES |
1674 | |
1675 | /* Skip spaces. */ | |
1676 | while (*c == ' ' || *c == '\t') | |
1677 | c++; | |
1678 | ||
1679 | /* Skip quote. */ | |
1680 | if (*c != '"') | |
fa841200 | 1681 | goto bad_cpp_line; |
d7d528c8 ES |
1682 | ++c; |
1683 | ||
8fc541d3 | 1684 | wide_filename = c; |
d4fa05b9 | 1685 | |
d7d528c8 | 1686 | /* Make filename end at quote. */ |
2d7c7df6 | 1687 | unescape = 0; |
d7d528c8 | 1688 | escaped = false; |
edf1eac2 | 1689 | while (*c && ! (!escaped && *c == '"')) |
d7d528c8 ES |
1690 | { |
1691 | if (escaped) | |
edf1eac2 | 1692 | escaped = false; |
2d7c7df6 JJ |
1693 | else if (*c == '\\') |
1694 | { | |
1695 | escaped = true; | |
1696 | unescape++; | |
1697 | } | |
d7d528c8 ES |
1698 | ++c; |
1699 | } | |
1700 | ||
1701 | if (! *c) | |
fa841200 TS |
1702 | /* Preprocessor line has no closing quote. */ |
1703 | goto bad_cpp_line; | |
d7d528c8 | 1704 | |
d4fa05b9 TS |
1705 | *c++ = '\0'; |
1706 | ||
2d7c7df6 JJ |
1707 | /* Undo effects of cpp_quote_string. */ |
1708 | if (unescape) | |
1709 | { | |
8fc541d3 | 1710 | gfc_char_t *s = wide_filename; |
b0b14c7b | 1711 | gfc_char_t *d = gfc_get_wide_string (c - wide_filename - unescape); |
d7d528c8 | 1712 | |
8fc541d3 | 1713 | wide_filename = d; |
2d7c7df6 JJ |
1714 | while (*s) |
1715 | { | |
1716 | if (*s == '\\') | |
1717 | *d++ = *++s; | |
1718 | else | |
1719 | *d++ = *s; | |
1720 | s++; | |
1721 | } | |
1722 | *d = '\0'; | |
1723 | } | |
d7d528c8 | 1724 | |
d4fa05b9 | 1725 | /* Get flags. */ |
4c3a6ca1 | 1726 | |
1e39a151 | 1727 | flag[1] = flag[2] = flag[3] = flag[4] = false; |
6de9cd9a | 1728 | |
6de9cd9a DN |
1729 | for (;;) |
1730 | { | |
8fc541d3 | 1731 | c = wide_strchr (c, ' '); |
d4fa05b9 TS |
1732 | if (c == NULL) |
1733 | break; | |
6de9cd9a | 1734 | |
d4fa05b9 | 1735 | c++; |
8fc541d3 | 1736 | i = wide_atoi (c); |
6de9cd9a | 1737 | |
d4fa05b9 TS |
1738 | if (1 <= i && i <= 4) |
1739 | flag[i] = true; | |
1740 | } | |
4c3a6ca1 | 1741 | |
8fc541d3 FXC |
1742 | /* Convert the filename in wide characters into a filename in narrow |
1743 | characters. */ | |
00660189 | 1744 | filename = gfc_widechar_to_char (wide_filename, -1); |
8fc541d3 | 1745 | |
d4fa05b9 | 1746 | /* Interpret flags. */ |
4c3a6ca1 | 1747 | |
94b00ee4 | 1748 | if (flag[1]) /* Starting new file. */ |
d4fa05b9 | 1749 | { |
c8cc8542 | 1750 | f = get_file (filename, LC_RENAME); |
1b271c9b | 1751 | add_file_change (f->filename, f->inclusion_line); |
d4fa05b9 TS |
1752 | current_file = f; |
1753 | } | |
4c3a6ca1 | 1754 | |
d4fa05b9 TS |
1755 | if (flag[2]) /* Ending current file. */ |
1756 | { | |
94b00ee4 | 1757 | if (!current_file->up |
ba78087b | 1758 | || filename_cmp (current_file->up->filename, filename) != 0) |
4c3a6ca1 JJ |
1759 | { |
1760 | gfc_warning_now ("%s:%d: file %s left but not entered", | |
1761 | current_file->filename, current_file->line, | |
1762 | filename); | |
2d7c7df6 | 1763 | if (unescape) |
cede9502 JM |
1764 | free (wide_filename); |
1765 | free (filename); | |
4c3a6ca1 JJ |
1766 | return; |
1767 | } | |
ee07457b | 1768 | |
1b271c9b | 1769 | add_file_change (NULL, line); |
94b00ee4 | 1770 | current_file = current_file->up; |
ee07457b FXC |
1771 | linemap_add (line_table, LC_RENAME, false, current_file->filename, |
1772 | current_file->line); | |
d4fa05b9 | 1773 | } |
4c3a6ca1 | 1774 | |
d4fa05b9 TS |
1775 | /* The name of the file can be a temporary file produced by |
1776 | cpp. Replace the name if it is different. */ | |
4c3a6ca1 | 1777 | |
ba78087b | 1778 | if (filename_cmp (current_file->filename, filename) != 0) |
d4fa05b9 | 1779 | { |
95213750 LB |
1780 | /* FIXME: we leak the old filename because a pointer to it may be stored |
1781 | in the linemap. Alternative could be using GC or updating linemap to | |
1782 | point to the new name, but there is no API for that currently. */ | |
ece3f663 | 1783 | current_file->filename = xstrdup (filename); |
d4fa05b9 | 1784 | } |
fa841200 | 1785 | |
4c3a6ca1 JJ |
1786 | /* Set new line number. */ |
1787 | current_file->line = line; | |
2d7c7df6 | 1788 | if (unescape) |
cede9502 JM |
1789 | free (wide_filename); |
1790 | free (filename); | |
fa841200 TS |
1791 | return; |
1792 | ||
1793 | bad_cpp_line: | |
4c3a6ca1 | 1794 | gfc_warning_now ("%s:%d: Illegal preprocessor directive", |
fa841200 TS |
1795 | current_file->filename, current_file->line); |
1796 | current_file->line++; | |
d4fa05b9 TS |
1797 | } |
1798 | ||
1799 | ||
17b1d2a0 | 1800 | static gfc_try load_file (const char *, const char *, bool); |
d4fa05b9 TS |
1801 | |
1802 | /* include_line()-- Checks a line buffer to see if it is an include | |
1803 | line. If so, we call load_file() recursively to load the included | |
1804 | file. We never return a syntax error because a statement like | |
1805 | "include = 5" is perfectly legal. We return false if no include was | |
1806 | processed or true if we matched an include. */ | |
1807 | ||
1808 | static bool | |
8fc541d3 | 1809 | include_line (gfc_char_t *line) |
d4fa05b9 | 1810 | { |
8fc541d3 FXC |
1811 | gfc_char_t quote, *c, *begin, *stop; |
1812 | char *filename; | |
9b9e4cd6 | 1813 | |
d4fa05b9 | 1814 | c = line; |
9b9e4cd6 | 1815 | |
e3339d0f | 1816 | if (gfc_option.gfc_flag_openmp) |
9b9e4cd6 JJ |
1817 | { |
1818 | if (gfc_current_form == FORM_FREE) | |
1819 | { | |
1820 | while (*c == ' ' || *c == '\t') | |
1821 | c++; | |
1822 | if (*c == '!' && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) | |
1823 | c += 3; | |
1824 | } | |
1825 | else | |
1826 | { | |
1827 | if ((*c == '!' || *c == 'c' || *c == 'C' || *c == '*') | |
1828 | && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) | |
1829 | c += 3; | |
1830 | } | |
1831 | } | |
1832 | ||
d4fa05b9 TS |
1833 | while (*c == ' ' || *c == '\t') |
1834 | c++; | |
1835 | ||
00660189 | 1836 | if (gfc_wide_strncasecmp (c, "include", 7)) |
8fc541d3 | 1837 | return false; |
d4fa05b9 TS |
1838 | |
1839 | c += 7; | |
1840 | while (*c == ' ' || *c == '\t') | |
1841 | c++; | |
1842 | ||
1843 | /* Find filename between quotes. */ | |
1844 | ||
1845 | quote = *c++; | |
1846 | if (quote != '"' && quote != '\'') | |
1847 | return false; | |
1848 | ||
1849 | begin = c; | |
1850 | ||
1851 | while (*c != quote && *c != '\0') | |
1852 | c++; | |
1853 | ||
1854 | if (*c == '\0') | |
1855 | return false; | |
1856 | ||
1857 | stop = c++; | |
1858 | ||
1859 | while (*c == ' ' || *c == '\t') | |
1860 | c++; | |
1861 | ||
1862 | if (*c != '\0' && *c != '!') | |
1863 | return false; | |
1864 | ||
f7b529fa | 1865 | /* We have an include line at this point. */ |
d4fa05b9 TS |
1866 | |
1867 | *stop = '\0'; /* It's ok to trash the buffer, as this line won't be | |
1868 | read by anything else. */ | |
1869 | ||
00660189 | 1870 | filename = gfc_widechar_to_char (begin, -1); |
570f4691 | 1871 | if (load_file (filename, NULL, false) == FAILURE) |
abba1823 | 1872 | exit (FATAL_EXIT_CODE); |
570f4691 | 1873 | |
cede9502 | 1874 | free (filename); |
d4fa05b9 TS |
1875 | return true; |
1876 | } | |
1877 | ||
edf1eac2 | 1878 | |
d4fa05b9 TS |
1879 | /* Load a file into memory by calling load_line until the file ends. */ |
1880 | ||
17b1d2a0 | 1881 | static gfc_try |
e513a086 | 1882 | load_file (const char *realfilename, const char *displayedname, bool initial) |
d4fa05b9 | 1883 | { |
8fc541d3 | 1884 | gfc_char_t *line; |
d4fa05b9 TS |
1885 | gfc_linebuf *b; |
1886 | gfc_file *f; | |
1887 | FILE *input; | |
d1e3d6ae | 1888 | int len, line_len; |
caef7872 | 1889 | bool first_line; |
e513a086 | 1890 | const char *filename; |
892a371f DS |
1891 | /* If realfilename and displayedname are different and non-null then |
1892 | surely realfilename is the preprocessed form of | |
1893 | displayedname. */ | |
1894 | bool preprocessed_p = (realfilename && displayedname | |
1895 | && strcmp (realfilename, displayedname)); | |
e513a086 TB |
1896 | |
1897 | filename = displayedname ? displayedname : realfilename; | |
d4fa05b9 TS |
1898 | |
1899 | for (f = current_file; f; f = f->up) | |
ba78087b | 1900 | if (filename_cmp (filename, f->filename) == 0) |
d4fa05b9 | 1901 | { |
0ee1b105 TB |
1902 | fprintf (stderr, "%s:%d: Error: File '%s' is being included " |
1903 | "recursively\n", current_file->filename, current_file->line, | |
1904 | filename); | |
d4fa05b9 TS |
1905 | return FAILURE; |
1906 | } | |
1907 | ||
1908 | if (initial) | |
1909 | { | |
2d7c7df6 JJ |
1910 | if (gfc_src_file) |
1911 | { | |
1912 | input = gfc_src_file; | |
1913 | gfc_src_file = NULL; | |
1914 | } | |
1915 | else | |
e513a086 | 1916 | input = gfc_open_file (realfilename); |
d4fa05b9 TS |
1917 | if (input == NULL) |
1918 | { | |
1919 | gfc_error_now ("Can't open file '%s'", filename); | |
1920 | return FAILURE; | |
1921 | } | |
1922 | } | |
1923 | else | |
1924 | { | |
e513a086 | 1925 | input = gfc_open_included_file (realfilename, false, false); |
d4fa05b9 TS |
1926 | if (input == NULL) |
1927 | { | |
0ee1b105 TB |
1928 | fprintf (stderr, "%s:%d: Error: Can't open included file '%s'\n", |
1929 | current_file->filename, current_file->line, filename); | |
d4fa05b9 TS |
1930 | return FAILURE; |
1931 | } | |
1932 | } | |
1933 | ||
892a371f | 1934 | /* Load the file. |
d4fa05b9 | 1935 | |
892a371f DS |
1936 | A "non-initial" file means a file that is being included. In |
1937 | that case we are creating an LC_ENTER map. | |
1938 | ||
1939 | An "initial" file means a main file; one that is not included. | |
1940 | That file has already got at least one (surely more) line map(s) | |
1941 | created by gfc_init. So the subsequent map created in that case | |
1942 | must have LC_RENAME reason. | |
1943 | ||
1944 | This latter case is not true for a preprocessed file. In that | |
1945 | case, although the file is "initial", the line maps created by | |
1946 | gfc_init was used during the preprocessing of the file. Now that | |
1947 | the preprocessing is over and we are being fed the result of that | |
1948 | preprocessing, we need to create a brand new line map for the | |
1949 | preprocessed file, so the reason is going to be LC_ENTER. */ | |
1950 | ||
1951 | f = get_file (filename, (initial && !preprocessed_p) ? LC_RENAME : LC_ENTER); | |
1b271c9b JJ |
1952 | if (!initial) |
1953 | add_file_change (f->filename, f->inclusion_line); | |
d4fa05b9 TS |
1954 | current_file = f; |
1955 | current_file->line = 1; | |
f56c5d5d | 1956 | line = NULL; |
d1e3d6ae | 1957 | line_len = 0; |
caef7872 | 1958 | first_line = true; |
d4fa05b9 | 1959 | |
2d7c7df6 JJ |
1960 | if (initial && gfc_src_preprocessor_lines[0]) |
1961 | { | |
1962 | preprocessor_line (gfc_src_preprocessor_lines[0]); | |
cede9502 | 1963 | free (gfc_src_preprocessor_lines[0]); |
2d7c7df6 JJ |
1964 | gfc_src_preprocessor_lines[0] = NULL; |
1965 | if (gfc_src_preprocessor_lines[1]) | |
1966 | { | |
1967 | preprocessor_line (gfc_src_preprocessor_lines[1]); | |
cede9502 | 1968 | free (gfc_src_preprocessor_lines[1]); |
2d7c7df6 JJ |
1969 | gfc_src_preprocessor_lines[1] = NULL; |
1970 | } | |
1971 | } | |
1972 | ||
16ab8e74 | 1973 | for (;;) |
d4fa05b9 | 1974 | { |
f2f5443c | 1975 | int trunc = load_line (input, &line, &line_len, NULL); |
d4fa05b9 | 1976 | |
8fc541d3 | 1977 | len = gfc_wide_strlen (line); |
6de9cd9a DN |
1978 | if (feof (input) && len == 0) |
1979 | break; | |
1980 | ||
caef7872 FXC |
1981 | /* If this is the first line of the file, it can contain a byte |
1982 | order mark (BOM), which we will ignore: | |
1983 | FF FE is UTF-16 little endian, | |
1984 | FE FF is UTF-16 big endian, | |
1985 | EF BB BF is UTF-8. */ | |
1986 | if (first_line | |
8fc541d3 FXC |
1987 | && ((line_len >= 2 && line[0] == (unsigned char) '\xFF' |
1988 | && line[1] == (unsigned char) '\xFE') | |
1989 | || (line_len >= 2 && line[0] == (unsigned char) '\xFE' | |
1990 | && line[1] == (unsigned char) '\xFF') | |
1991 | || (line_len >= 3 && line[0] == (unsigned char) '\xEF' | |
1992 | && line[1] == (unsigned char) '\xBB' | |
1993 | && line[2] == (unsigned char) '\xBF'))) | |
caef7872 | 1994 | { |
8fc541d3 | 1995 | int n = line[1] == (unsigned char) '\xBB' ? 3 : 2; |
7b901ac4 | 1996 | gfc_char_t *new_char = gfc_get_wide_string (line_len); |
caef7872 | 1997 | |
7b901ac4 | 1998 | wide_strcpy (new_char, &line[n]); |
cede9502 | 1999 | free (line); |
7b901ac4 | 2000 | line = new_char; |
caef7872 FXC |
2001 | len -= n; |
2002 | } | |
2003 | ||
d4fa05b9 TS |
2004 | /* There are three things this line can be: a line of Fortran |
2005 | source, an include line or a C preprocessor directive. */ | |
6de9cd9a | 2006 | |
d4fa05b9 TS |
2007 | if (line[0] == '#') |
2008 | { | |
9e8a6720 FXC |
2009 | /* When -g3 is specified, it's possible that we emit #define |
2010 | and #undef lines, which we need to pass to the middle-end | |
2011 | so that it can emit correct debug info. */ | |
2012 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
8fc541d3 FXC |
2013 | && (wide_strncmp (line, "#define ", 8) == 0 |
2014 | || wide_strncmp (line, "#undef ", 7) == 0)) | |
9e8a6720 FXC |
2015 | ; |
2016 | else | |
2017 | { | |
2018 | preprocessor_line (line); | |
2019 | continue; | |
2020 | } | |
d4fa05b9 | 2021 | } |
6de9cd9a | 2022 | |
caef7872 FXC |
2023 | /* Preprocessed files have preprocessor lines added before the byte |
2024 | order mark, so first_line is not about the first line of the file | |
2025 | but the first line that's not a preprocessor line. */ | |
2026 | first_line = false; | |
2027 | ||
d4fa05b9 TS |
2028 | if (include_line (line)) |
2029 | { | |
2030 | current_file->line++; | |
2031 | continue; | |
6de9cd9a DN |
2032 | } |
2033 | ||
d4fa05b9 TS |
2034 | /* Add line. */ |
2035 | ||
f7d2e5d4 JB |
2036 | b = XCNEWVAR (gfc_linebuf, gfc_linebuf_header_size |
2037 | + (len + 1) * sizeof (gfc_char_t)); | |
d4fa05b9 | 2038 | |
c8cc8542 | 2039 | b->location |
5ffeb913 | 2040 | = linemap_line_start (line_table, current_file->line++, 120); |
d4fa05b9 | 2041 | b->file = current_file; |
ba1defa5 | 2042 | b->truncated = trunc; |
8fc541d3 | 2043 | wide_strcpy (b->line, line); |
d4fa05b9 TS |
2044 | |
2045 | if (line_head == NULL) | |
2046 | line_head = b; | |
2047 | else | |
2048 | line_tail->next = b; | |
2049 | ||
2050 | line_tail = b; | |
1b271c9b JJ |
2051 | |
2052 | while (file_changes_cur < file_changes_count) | |
2053 | file_changes[file_changes_cur++].lb = b; | |
6de9cd9a | 2054 | } |
d4fa05b9 | 2055 | |
f56c5d5d | 2056 | /* Release the line buffer allocated in load_line. */ |
cede9502 | 2057 | free (line); |
f56c5d5d | 2058 | |
d4fa05b9 TS |
2059 | fclose (input); |
2060 | ||
1b271c9b JJ |
2061 | if (!initial) |
2062 | add_file_change (NULL, current_file->inclusion_line + 1); | |
d4fa05b9 | 2063 | current_file = current_file->up; |
5ffeb913 | 2064 | linemap_add (line_table, LC_LEAVE, 0, NULL, 0); |
d4fa05b9 | 2065 | return SUCCESS; |
6de9cd9a DN |
2066 | } |
2067 | ||
2068 | ||
d4fa05b9 | 2069 | /* Open a new file and start scanning from that file. Returns SUCCESS |
df2fba9e | 2070 | if everything went OK, FAILURE otherwise. If form == FORM_UNKNOWN |
d4fa05b9 TS |
2071 | it tries to determine the source form from the filename, defaulting |
2072 | to free form. */ | |
6de9cd9a | 2073 | |
17b1d2a0 | 2074 | gfc_try |
e0bcf78c | 2075 | gfc_new_file (void) |
6de9cd9a | 2076 | { |
17b1d2a0 | 2077 | gfc_try result; |
6de9cd9a | 2078 | |
670637ee DF |
2079 | if (gfc_cpp_enabled ()) |
2080 | { | |
2081 | result = gfc_cpp_preprocess (gfc_source_file); | |
2082 | if (!gfc_cpp_preprocess_only ()) | |
e513a086 | 2083 | result = load_file (gfc_cpp_temporary_file (), gfc_source_file, true); |
670637ee DF |
2084 | } |
2085 | else | |
e513a086 | 2086 | result = load_file (gfc_source_file, NULL, true); |
6de9cd9a | 2087 | |
63645982 TS |
2088 | gfc_current_locus.lb = line_head; |
2089 | gfc_current_locus.nextc = (line_head == NULL) ? NULL : line_head->line; | |
6de9cd9a | 2090 | |
d4fa05b9 TS |
2091 | #if 0 /* Debugging aid. */ |
2092 | for (; line_head; line_head = line_head->next) | |
6c1abb5c FXC |
2093 | printf ("%s:%3d %s\n", LOCATION_FILE (line_head->location), |
2094 | LOCATION_LINE (line_head->location), line_head->line); | |
6de9cd9a | 2095 | |
abba1823 | 2096 | exit (SUCCESS_EXIT_CODE); |
d4fa05b9 | 2097 | #endif |
6de9cd9a | 2098 | |
d4fa05b9 | 2099 | return result; |
6de9cd9a | 2100 | } |
2d7c7df6 JJ |
2101 | |
2102 | static char * | |
2103 | unescape_filename (const char *ptr) | |
2104 | { | |
2105 | const char *p = ptr, *s; | |
2106 | char *d, *ret; | |
2107 | int escaped, unescape = 0; | |
2108 | ||
2109 | /* Make filename end at quote. */ | |
2110 | escaped = false; | |
2111 | while (*p && ! (! escaped && *p == '"')) | |
2112 | { | |
2113 | if (escaped) | |
2114 | escaped = false; | |
2115 | else if (*p == '\\') | |
2116 | { | |
2117 | escaped = true; | |
2118 | unescape++; | |
2119 | } | |
2120 | ++p; | |
2121 | } | |
2122 | ||
edf1eac2 | 2123 | if (!*p || p[1]) |
2d7c7df6 JJ |
2124 | return NULL; |
2125 | ||
2126 | /* Undo effects of cpp_quote_string. */ | |
2127 | s = ptr; | |
ece3f663 | 2128 | d = XCNEWVEC (char, p + 1 - ptr - unescape); |
2d7c7df6 JJ |
2129 | ret = d; |
2130 | ||
2131 | while (s != p) | |
2132 | { | |
2133 | if (*s == '\\') | |
2134 | *d++ = *++s; | |
2135 | else | |
2136 | *d++ = *s; | |
2137 | s++; | |
2138 | } | |
2139 | *d = '\0'; | |
2140 | return ret; | |
2141 | } | |
2142 | ||
2143 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
2144 | handle the directives so we know the original file name. */ | |
2145 | ||
2146 | const char * | |
2147 | gfc_read_orig_filename (const char *filename, const char **canon_source_file) | |
2148 | { | |
2149 | int c, len; | |
8fc541d3 | 2150 | char *dirname, *tmp; |
2d7c7df6 JJ |
2151 | |
2152 | gfc_src_file = gfc_open_file (filename); | |
2153 | if (gfc_src_file == NULL) | |
2154 | return NULL; | |
2155 | ||
c4da1827 | 2156 | c = getc (gfc_src_file); |
2d7c7df6 JJ |
2157 | |
2158 | if (c != '#') | |
2159 | return NULL; | |
2160 | ||
2161 | len = 0; | |
f2f5443c | 2162 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[0], &len, &c); |
2d7c7df6 | 2163 | |
8fc541d3 | 2164 | if (wide_strncmp (gfc_src_preprocessor_lines[0], "# 1 \"", 5) != 0) |
2d7c7df6 JJ |
2165 | return NULL; |
2166 | ||
00660189 | 2167 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[0][5], -1); |
8fc541d3 | 2168 | filename = unescape_filename (tmp); |
cede9502 | 2169 | free (tmp); |
2d7c7df6 JJ |
2170 | if (filename == NULL) |
2171 | return NULL; | |
2172 | ||
c4da1827 | 2173 | c = getc (gfc_src_file); |
2d7c7df6 JJ |
2174 | |
2175 | if (c != '#') | |
2176 | return filename; | |
2177 | ||
2178 | len = 0; | |
f2f5443c | 2179 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[1], &len, &c); |
2d7c7df6 | 2180 | |
8fc541d3 | 2181 | if (wide_strncmp (gfc_src_preprocessor_lines[1], "# 1 \"", 5) != 0) |
2d7c7df6 JJ |
2182 | return filename; |
2183 | ||
00660189 | 2184 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[1][5], -1); |
8fc541d3 | 2185 | dirname = unescape_filename (tmp); |
cede9502 | 2186 | free (tmp); |
2d7c7df6 JJ |
2187 | if (dirname == NULL) |
2188 | return filename; | |
2189 | ||
2190 | len = strlen (dirname); | |
2191 | if (len < 3 || dirname[len - 1] != '/' || dirname[len - 2] != '/') | |
2192 | { | |
cede9502 | 2193 | free (dirname); |
2d7c7df6 JJ |
2194 | return filename; |
2195 | } | |
2196 | dirname[len - 2] = '\0'; | |
2197 | set_src_pwd (dirname); | |
2198 | ||
2199 | if (! IS_ABSOLUTE_PATH (filename)) | |
2200 | { | |
ece3f663 | 2201 | char *p = XCNEWVEC (char, len + strlen (filename)); |
2d7c7df6 JJ |
2202 | |
2203 | memcpy (p, dirname, len - 2); | |
2204 | p[len - 2] = '/'; | |
2205 | strcpy (p + len - 1, filename); | |
2206 | *canon_source_file = p; | |
2207 | } | |
2208 | ||
cede9502 | 2209 | free (dirname); |
2d7c7df6 JJ |
2210 | return filename; |
2211 | } |