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6de9cd9a | 1 | /* Character scanner. |
23a5b65a | 2 | Copyright (C) 2000-2014 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
9fc4d79b | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
9fc4d79b TS |
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 | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 10 | version. |
6de9cd9a | 11 | |
9fc4d79b TS |
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. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
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" | |
d22e4895 | 44 | #include "system.h" |
953bee7c | 45 | #include "coretypes.h" |
6de9cd9a | 46 | #include "gfortran.h" |
7274feea | 47 | #include "toplev.h" /* For set_src_pwd. */ |
9e8a6720 FXC |
48 | #include "debug.h" |
49 | #include "flags.h" | |
670637ee | 50 | #include "cpp.h" |
070edbc2 | 51 | #include "scanner.h" |
6de9cd9a DN |
52 | |
53 | /* List of include file search directories. */ | |
070edbc2 | 54 | gfc_directorylist *include_dirs, *intrinsic_modules_dirs; |
6de9cd9a | 55 | |
d4fa05b9 | 56 | static gfc_file *file_head, *current_file; |
6de9cd9a | 57 | |
08a6b8e0 | 58 | static int continue_flag, end_flag, openmp_flag, gcc_attribute_flag; |
5a06474c | 59 | static int continue_count, continue_line; |
6c7a4dfd | 60 | static locus openmp_locus; |
08a6b8e0 | 61 | static locus gcc_attribute_locus; |
6de9cd9a | 62 | |
d4fa05b9 TS |
63 | gfc_source_form gfc_current_form; |
64 | static gfc_linebuf *line_head, *line_tail; | |
65 | ||
63645982 | 66 | locus gfc_current_locus; |
e0bcf78c | 67 | const char *gfc_source_file; |
2d7c7df6 | 68 | static FILE *gfc_src_file; |
8fc541d3 | 69 | static gfc_char_t *gfc_src_preprocessor_lines[2]; |
2d7c7df6 | 70 | |
1b271c9b JJ |
71 | static struct gfc_file_change |
72 | { | |
73 | const char *filename; | |
74 | gfc_linebuf *lb; | |
75 | int line; | |
76 | } *file_changes; | |
77 | size_t file_changes_cur, file_changes_count; | |
78 | size_t file_changes_allocated; | |
79 | ||
8fc541d3 FXC |
80 | |
81 | /* Functions dealing with our wide characters (gfc_char_t) and | |
82 | sequences of such characters. */ | |
83 | ||
84 | int | |
85 | gfc_wide_fits_in_byte (gfc_char_t c) | |
86 | { | |
87 | return (c <= UCHAR_MAX); | |
88 | } | |
89 | ||
90 | static inline int | |
91 | wide_is_ascii (gfc_char_t c) | |
92 | { | |
93 | return (gfc_wide_fits_in_byte (c) && ((unsigned char) c & ~0x7f) == 0); | |
94 | } | |
95 | ||
96 | int | |
97 | gfc_wide_is_printable (gfc_char_t c) | |
98 | { | |
99 | return (gfc_wide_fits_in_byte (c) && ISPRINT ((unsigned char) c)); | |
100 | } | |
101 | ||
102 | gfc_char_t | |
103 | gfc_wide_tolower (gfc_char_t c) | |
104 | { | |
105 | return (wide_is_ascii (c) ? (gfc_char_t) TOLOWER((unsigned char) c) : c); | |
106 | } | |
107 | ||
00660189 FXC |
108 | gfc_char_t |
109 | gfc_wide_toupper (gfc_char_t c) | |
110 | { | |
111 | return (wide_is_ascii (c) ? (gfc_char_t) TOUPPER((unsigned char) c) : c); | |
112 | } | |
113 | ||
8fc541d3 FXC |
114 | int |
115 | gfc_wide_is_digit (gfc_char_t c) | |
116 | { | |
117 | return (c >= '0' && c <= '9'); | |
118 | } | |
119 | ||
120 | static inline int | |
121 | wide_atoi (gfc_char_t *c) | |
122 | { | |
123 | #define MAX_DIGITS 20 | |
124 | char buf[MAX_DIGITS+1]; | |
125 | int i = 0; | |
126 | ||
127 | while (gfc_wide_is_digit(*c) && i < MAX_DIGITS) | |
128 | buf[i++] = *c++; | |
129 | buf[i] = '\0'; | |
130 | return atoi (buf); | |
131 | } | |
132 | ||
133 | size_t | |
134 | gfc_wide_strlen (const gfc_char_t *str) | |
135 | { | |
136 | size_t i; | |
137 | ||
138 | for (i = 0; str[i]; i++) | |
139 | ; | |
140 | ||
141 | return i; | |
142 | } | |
143 | ||
00660189 FXC |
144 | gfc_char_t * |
145 | gfc_wide_memset (gfc_char_t *b, gfc_char_t c, size_t len) | |
146 | { | |
147 | size_t i; | |
148 | ||
149 | for (i = 0; i < len; i++) | |
150 | b[i] = c; | |
151 | ||
152 | return b; | |
153 | } | |
154 | ||
8fc541d3 FXC |
155 | static gfc_char_t * |
156 | wide_strcpy (gfc_char_t *dest, const gfc_char_t *src) | |
157 | { | |
158 | gfc_char_t *d; | |
159 | ||
160 | for (d = dest; (*d = *src) != '\0'; ++src, ++d) | |
161 | ; | |
162 | ||
163 | return dest; | |
164 | } | |
165 | ||
166 | static gfc_char_t * | |
00660189 | 167 | wide_strchr (const gfc_char_t *s, gfc_char_t c) |
8fc541d3 FXC |
168 | { |
169 | do { | |
170 | if (*s == c) | |
171 | { | |
00660189 | 172 | return CONST_CAST(gfc_char_t *, s); |
8fc541d3 FXC |
173 | } |
174 | } while (*s++); | |
175 | return 0; | |
176 | } | |
177 | ||
00660189 FXC |
178 | char * |
179 | gfc_widechar_to_char (const gfc_char_t *s, int length) | |
180 | { | |
181 | size_t len, i; | |
182 | char *res; | |
183 | ||
184 | if (s == NULL) | |
185 | return NULL; | |
186 | ||
187 | /* Passing a negative length is used to indicate that length should be | |
188 | calculated using gfc_wide_strlen(). */ | |
189 | len = (length >= 0 ? (size_t) length : gfc_wide_strlen (s)); | |
ece3f663 | 190 | res = XNEWVEC (char, len + 1); |
00660189 FXC |
191 | |
192 | for (i = 0; i < len; i++) | |
193 | { | |
194 | gcc_assert (gfc_wide_fits_in_byte (s[i])); | |
195 | res[i] = (unsigned char) s[i]; | |
196 | } | |
197 | ||
198 | res[len] = '\0'; | |
199 | return res; | |
200 | } | |
201 | ||
202 | gfc_char_t * | |
203 | gfc_char_to_widechar (const char *s) | |
8fc541d3 | 204 | { |
00660189 FXC |
205 | size_t len, i; |
206 | gfc_char_t *res; | |
207 | ||
208 | if (s == NULL) | |
209 | return NULL; | |
210 | ||
211 | len = strlen (s); | |
212 | res = gfc_get_wide_string (len + 1); | |
8fc541d3 FXC |
213 | |
214 | for (i = 0; i < len; i++) | |
00660189 | 215 | res[i] = (unsigned char) s[i]; |
8fc541d3 FXC |
216 | |
217 | res[len] = '\0'; | |
218 | return res; | |
219 | } | |
220 | ||
221 | static int | |
222 | wide_strncmp (const gfc_char_t *s1, const char *s2, size_t n) | |
223 | { | |
224 | gfc_char_t c1, c2; | |
225 | ||
226 | while (n-- > 0) | |
227 | { | |
228 | c1 = *s1++; | |
229 | c2 = *s2++; | |
230 | if (c1 != c2) | |
231 | return (c1 > c2 ? 1 : -1); | |
232 | if (c1 == '\0') | |
233 | return 0; | |
234 | } | |
235 | return 0; | |
236 | } | |
237 | ||
00660189 FXC |
238 | int |
239 | gfc_wide_strncasecmp (const gfc_char_t *s1, const char *s2, size_t n) | |
8fc541d3 FXC |
240 | { |
241 | gfc_char_t c1, c2; | |
242 | ||
243 | while (n-- > 0) | |
244 | { | |
245 | c1 = gfc_wide_tolower (*s1++); | |
246 | c2 = TOLOWER (*s2++); | |
247 | if (c1 != c2) | |
248 | return (c1 > c2 ? 1 : -1); | |
249 | if (c1 == '\0') | |
250 | return 0; | |
251 | } | |
252 | return 0; | |
253 | } | |
254 | ||
255 | ||
6de9cd9a DN |
256 | /* Main scanner initialization. */ |
257 | ||
258 | void | |
259 | gfc_scanner_init_1 (void) | |
260 | { | |
d4fa05b9 TS |
261 | file_head = NULL; |
262 | line_head = NULL; | |
263 | line_tail = NULL; | |
6de9cd9a | 264 | |
5a06474c JD |
265 | continue_count = 0; |
266 | continue_line = 0; | |
267 | ||
6de9cd9a DN |
268 | end_flag = 0; |
269 | } | |
270 | ||
271 | ||
272 | /* Main scanner destructor. */ | |
273 | ||
274 | void | |
275 | gfc_scanner_done_1 (void) | |
276 | { | |
d4fa05b9 TS |
277 | gfc_linebuf *lb; |
278 | gfc_file *f; | |
6de9cd9a | 279 | |
d4fa05b9 | 280 | while(line_head != NULL) |
6de9cd9a | 281 | { |
d4fa05b9 | 282 | lb = line_head->next; |
cede9502 | 283 | free (line_head); |
d4fa05b9 | 284 | line_head = lb; |
6de9cd9a | 285 | } |
d4fa05b9 TS |
286 | |
287 | while(file_head != NULL) | |
6de9cd9a | 288 | { |
d4fa05b9 | 289 | f = file_head->next; |
cede9502 JM |
290 | free (file_head->filename); |
291 | free (file_head); | |
d4fa05b9 | 292 | file_head = f; |
6de9cd9a DN |
293 | } |
294 | } | |
295 | ||
296 | ||
297 | /* Adds path to the list pointed to by list. */ | |
298 | ||
31198773 FXC |
299 | static void |
300 | add_path_to_list (gfc_directorylist **list, const char *path, | |
57bdf399 | 301 | bool use_for_modules, bool head, bool warn) |
6de9cd9a DN |
302 | { |
303 | gfc_directorylist *dir; | |
304 | const char *p; | |
bfc16654 | 305 | char *q; |
ff9e56a9 | 306 | struct stat st; |
bfc16654 TK |
307 | size_t len; |
308 | int i; | |
ff9e56a9 | 309 | |
6de9cd9a | 310 | p = path; |
31198773 | 311 | while (*p == ' ' || *p == '\t') /* someone might do "-I include" */ |
6de9cd9a DN |
312 | if (*p++ == '\0') |
313 | return; | |
314 | ||
bfc16654 TK |
315 | /* Strip trailing directory separators from the path, as this |
316 | will confuse Windows systems. */ | |
317 | len = strlen (p); | |
318 | q = (char *) alloca (len + 1); | |
319 | memcpy (q, p, len + 1); | |
320 | i = len - 1; | |
524af0d6 | 321 | while (i >=0 && IS_DIR_SEPARATOR (q[i])) |
bfc16654 TK |
322 | q[i--] = '\0'; |
323 | ||
324 | if (stat (q, &st)) | |
ff9e56a9 TK |
325 | { |
326 | if (errno != ENOENT) | |
4daa149b TB |
327 | gfc_warning_now ("Include directory %qs: %s", path, |
328 | xstrerror(errno)); | |
7c02f68b | 329 | else if (warn) |
4daa149b TB |
330 | gfc_warning_now (OPT_Wmissing_include_dirs, |
331 | "Nonexistent include directory %qs", path); | |
ff9e56a9 TK |
332 | return; |
333 | } | |
334 | else if (!S_ISDIR (st.st_mode)) | |
335 | { | |
4daa149b | 336 | gfc_warning_now ("%qs is not a directory", path); |
ff9e56a9 TK |
337 | return; |
338 | } | |
339 | ||
0ee1b105 TB |
340 | if (head || *list == NULL) |
341 | { | |
342 | dir = XCNEW (gfc_directorylist); | |
343 | if (!head) | |
344 | *list = dir; | |
345 | } | |
6de9cd9a DN |
346 | else |
347 | { | |
0ee1b105 | 348 | dir = *list; |
6de9cd9a DN |
349 | while (dir->next) |
350 | dir = dir->next; | |
351 | ||
ece3f663 | 352 | dir->next = XCNEW (gfc_directorylist); |
6de9cd9a DN |
353 | dir = dir->next; |
354 | } | |
355 | ||
0ee1b105 TB |
356 | dir->next = head ? *list : NULL; |
357 | if (head) | |
358 | *list = dir; | |
31198773 | 359 | dir->use_for_modules = use_for_modules; |
ece3f663 | 360 | dir->path = XCNEWVEC (char, strlen (p) + 2); |
6de9cd9a DN |
361 | strcpy (dir->path, p); |
362 | strcat (dir->path, "/"); /* make '/' last character */ | |
363 | } | |
364 | ||
365 | ||
31198773 | 366 | void |
308f961b TK |
367 | gfc_add_include_path (const char *path, bool use_for_modules, bool file_dir, |
368 | bool warn) | |
31198773 | 369 | { |
308f961b | 370 | add_path_to_list (&include_dirs, path, use_for_modules, file_dir, warn); |
0ee1b105 TB |
371 | |
372 | /* For '#include "..."' these directories are automatically searched. */ | |
373 | if (!file_dir) | |
374 | gfc_cpp_add_include_path (xstrdup(path), true); | |
31198773 FXC |
375 | } |
376 | ||
377 | ||
378 | void | |
379 | gfc_add_intrinsic_modules_path (const char *path) | |
380 | { | |
57bdf399 | 381 | add_path_to_list (&intrinsic_modules_dirs, path, true, false, false); |
31198773 FXC |
382 | } |
383 | ||
384 | ||
6de9cd9a DN |
385 | /* Release resources allocated for options. */ |
386 | ||
387 | void | |
388 | gfc_release_include_path (void) | |
389 | { | |
390 | gfc_directorylist *p; | |
391 | ||
6de9cd9a DN |
392 | while (include_dirs != NULL) |
393 | { | |
394 | p = include_dirs; | |
395 | include_dirs = include_dirs->next; | |
cede9502 JM |
396 | free (p->path); |
397 | free (p); | |
6de9cd9a | 398 | } |
31198773 | 399 | |
31198773 FXC |
400 | while (intrinsic_modules_dirs != NULL) |
401 | { | |
402 | p = intrinsic_modules_dirs; | |
403 | intrinsic_modules_dirs = intrinsic_modules_dirs->next; | |
cede9502 JM |
404 | free (p->path); |
405 | free (p); | |
31198773 | 406 | } |
1bc23383 | 407 | |
cede9502 | 408 | free (gfc_option.module_dir); |
6de9cd9a DN |
409 | } |
410 | ||
6de9cd9a | 411 | |
31198773 | 412 | static FILE * |
d8ddea40 DF |
413 | open_included_file (const char *name, gfc_directorylist *list, |
414 | bool module, bool system) | |
6de9cd9a | 415 | { |
200cfbe7 | 416 | char *fullname; |
6de9cd9a DN |
417 | gfc_directorylist *p; |
418 | FILE *f; | |
419 | ||
31198773 | 420 | for (p = list; p; p = p->next) |
b424a572 | 421 | { |
31198773 FXC |
422 | if (module && !p->use_for_modules) |
423 | continue; | |
6de9cd9a | 424 | |
200cfbe7 | 425 | fullname = (char *) alloca(strlen (p->path) + strlen (name) + 1); |
6de9cd9a DN |
426 | strcpy (fullname, p->path); |
427 | strcat (fullname, name); | |
428 | ||
429 | f = gfc_open_file (fullname); | |
430 | if (f != NULL) | |
d8ddea40 DF |
431 | { |
432 | if (gfc_cpp_makedep ()) | |
433 | gfc_cpp_add_dep (fullname, system); | |
434 | ||
435 | return f; | |
436 | } | |
6de9cd9a DN |
437 | } |
438 | ||
439 | return NULL; | |
440 | } | |
441 | ||
31198773 FXC |
442 | |
443 | /* Opens file for reading, searching through the include directories | |
444 | given if necessary. If the include_cwd argument is true, we try | |
445 | to open the file in the current directory first. */ | |
446 | ||
447 | FILE * | |
448 | gfc_open_included_file (const char *name, bool include_cwd, bool module) | |
449 | { | |
d8ddea40 | 450 | FILE *f = NULL; |
e01f74e0 | 451 | |
d8ddea40 | 452 | if (IS_ABSOLUTE_PATH (name) || include_cwd) |
31198773 FXC |
453 | { |
454 | f = gfc_open_file (name); | |
d8ddea40 DF |
455 | if (f && gfc_cpp_makedep ()) |
456 | gfc_cpp_add_dep (name, false); | |
31198773 FXC |
457 | } |
458 | ||
d8ddea40 DF |
459 | if (!f) |
460 | f = open_included_file (name, include_dirs, module, false); | |
461 | ||
462 | return f; | |
31198773 FXC |
463 | } |
464 | ||
edf1eac2 | 465 | |
6de9cd9a DN |
466 | /* Test to see if we're at the end of the main source file. */ |
467 | ||
468 | int | |
469 | gfc_at_end (void) | |
470 | { | |
6de9cd9a DN |
471 | return end_flag; |
472 | } | |
473 | ||
474 | ||
475 | /* Test to see if we're at the end of the current file. */ | |
476 | ||
477 | int | |
478 | gfc_at_eof (void) | |
479 | { | |
6de9cd9a DN |
480 | if (gfc_at_end ()) |
481 | return 1; | |
482 | ||
d4fa05b9 | 483 | if (line_head == NULL) |
6de9cd9a DN |
484 | return 1; /* Null file */ |
485 | ||
63645982 | 486 | if (gfc_current_locus.lb == NULL) |
6de9cd9a DN |
487 | return 1; |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | ||
493 | /* Test to see if we're at the beginning of a new line. */ | |
494 | ||
495 | int | |
496 | gfc_at_bol (void) | |
497 | { | |
6de9cd9a DN |
498 | if (gfc_at_eof ()) |
499 | return 1; | |
500 | ||
63645982 | 501 | return (gfc_current_locus.nextc == gfc_current_locus.lb->line); |
6de9cd9a DN |
502 | } |
503 | ||
504 | ||
505 | /* Test to see if we're at the end of a line. */ | |
506 | ||
507 | int | |
508 | gfc_at_eol (void) | |
509 | { | |
6de9cd9a DN |
510 | if (gfc_at_eof ()) |
511 | return 1; | |
512 | ||
63645982 | 513 | return (*gfc_current_locus.nextc == '\0'); |
6de9cd9a DN |
514 | } |
515 | ||
60332588 | 516 | static void |
1b271c9b | 517 | add_file_change (const char *filename, int line) |
60332588 | 518 | { |
1b271c9b JJ |
519 | if (file_changes_count == file_changes_allocated) |
520 | { | |
521 | if (file_changes_allocated) | |
522 | file_changes_allocated *= 2; | |
523 | else | |
524 | file_changes_allocated = 16; | |
ece3f663 KG |
525 | file_changes = XRESIZEVEC (struct gfc_file_change, file_changes, |
526 | file_changes_allocated); | |
1b271c9b JJ |
527 | } |
528 | file_changes[file_changes_count].filename = filename; | |
529 | file_changes[file_changes_count].lb = NULL; | |
530 | file_changes[file_changes_count++].line = line; | |
531 | } | |
60332588 | 532 | |
1b271c9b JJ |
533 | static void |
534 | report_file_change (gfc_linebuf *lb) | |
535 | { | |
536 | size_t c = file_changes_cur; | |
537 | while (c < file_changes_count | |
538 | && file_changes[c].lb == lb) | |
539 | { | |
540 | if (file_changes[c].filename) | |
541 | (*debug_hooks->start_source_file) (file_changes[c].line, | |
542 | file_changes[c].filename); | |
543 | else | |
544 | (*debug_hooks->end_source_file) (file_changes[c].line); | |
545 | ++c; | |
546 | } | |
547 | file_changes_cur = c; | |
60332588 JJ |
548 | } |
549 | ||
550 | void | |
551 | gfc_start_source_files (void) | |
552 | { | |
553 | /* If the debugger wants the name of the main source file, | |
554 | we give it. */ | |
555 | if (debug_hooks->start_end_main_source_file) | |
556 | (*debug_hooks->start_source_file) (0, gfc_source_file); | |
557 | ||
1b271c9b JJ |
558 | file_changes_cur = 0; |
559 | report_file_change (gfc_current_locus.lb); | |
60332588 JJ |
560 | } |
561 | ||
562 | void | |
563 | gfc_end_source_files (void) | |
564 | { | |
1b271c9b | 565 | report_file_change (NULL); |
60332588 JJ |
566 | |
567 | if (debug_hooks->start_end_main_source_file) | |
568 | (*debug_hooks->end_source_file) (0); | |
569 | } | |
6de9cd9a DN |
570 | |
571 | /* Advance the current line pointer to the next line. */ | |
572 | ||
573 | void | |
574 | gfc_advance_line (void) | |
575 | { | |
6de9cd9a | 576 | if (gfc_at_end ()) |
4a58b9ad | 577 | return; |
6de9cd9a | 578 | |
63645982 | 579 | if (gfc_current_locus.lb == NULL) |
6de9cd9a | 580 | { |
d4fa05b9 TS |
581 | end_flag = 1; |
582 | return; | |
583 | } | |
6de9cd9a | 584 | |
9e8a6720 | 585 | if (gfc_current_locus.lb->next |
60332588 | 586 | && !gfc_current_locus.lb->next->dbg_emitted) |
9e8a6720 | 587 | { |
1b271c9b | 588 | report_file_change (gfc_current_locus.lb->next); |
60332588 | 589 | gfc_current_locus.lb->next->dbg_emitted = true; |
9e8a6720 FXC |
590 | } |
591 | ||
63645982 | 592 | gfc_current_locus.lb = gfc_current_locus.lb->next; |
6de9cd9a | 593 | |
edf1eac2 | 594 | if (gfc_current_locus.lb != NULL) |
63645982 | 595 | gfc_current_locus.nextc = gfc_current_locus.lb->line; |
d4fa05b9 TS |
596 | else |
597 | { | |
63645982 | 598 | gfc_current_locus.nextc = NULL; |
d4fa05b9 TS |
599 | end_flag = 1; |
600 | } | |
6de9cd9a DN |
601 | } |
602 | ||
603 | ||
604 | /* Get the next character from the input, advancing gfc_current_file's | |
605 | locus. When we hit the end of the line or the end of the file, we | |
606 | start returning a '\n' in order to complete the current statement. | |
607 | No Fortran line conventions are implemented here. | |
608 | ||
609 | Requiring explicit advances to the next line prevents the parse | |
610 | pointer from being on the wrong line if the current statement ends | |
611 | prematurely. */ | |
612 | ||
8fc541d3 | 613 | static gfc_char_t |
6de9cd9a DN |
614 | next_char (void) |
615 | { | |
8fc541d3 | 616 | gfc_char_t c; |
d4fa05b9 | 617 | |
63645982 | 618 | if (gfc_current_locus.nextc == NULL) |
6de9cd9a DN |
619 | return '\n'; |
620 | ||
8fc541d3 | 621 | c = *gfc_current_locus.nextc++; |
6de9cd9a DN |
622 | if (c == '\0') |
623 | { | |
63645982 | 624 | gfc_current_locus.nextc--; /* Remain on this line. */ |
6de9cd9a DN |
625 | c = '\n'; |
626 | } | |
627 | ||
628 | return c; | |
629 | } | |
630 | ||
edf1eac2 | 631 | |
6de9cd9a DN |
632 | /* Skip a comment. When we come here the parse pointer is positioned |
633 | immediately after the comment character. If we ever implement | |
9cd38d51 | 634 | compiler directives within comments, here is where we parse the |
6de9cd9a DN |
635 | directive. */ |
636 | ||
637 | static void | |
638 | skip_comment_line (void) | |
639 | { | |
8fc541d3 | 640 | gfc_char_t c; |
6de9cd9a DN |
641 | |
642 | do | |
643 | { | |
644 | c = next_char (); | |
645 | } | |
646 | while (c != '\n'); | |
647 | ||
648 | gfc_advance_line (); | |
649 | } | |
650 | ||
651 | ||
9e8a6720 FXC |
652 | int |
653 | gfc_define_undef_line (void) | |
654 | { | |
8fc541d3 FXC |
655 | char *tmp; |
656 | ||
9e8a6720 | 657 | /* All lines beginning with '#' are either #define or #undef. */ |
8fc541d3 | 658 | if (debug_info_level != DINFO_LEVEL_VERBOSE || gfc_peek_ascii_char () != '#') |
9e8a6720 FXC |
659 | return 0; |
660 | ||
8fc541d3 FXC |
661 | if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0) |
662 | { | |
00660189 | 663 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1); |
8fc541d3 FXC |
664 | (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb), |
665 | tmp); | |
cede9502 | 666 | free (tmp); |
8fc541d3 | 667 | } |
9e8a6720 | 668 | |
8fc541d3 FXC |
669 | if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0) |
670 | { | |
00660189 | 671 | tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1); |
8fc541d3 FXC |
672 | (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb), |
673 | tmp); | |
cede9502 | 674 | free (tmp); |
8fc541d3 | 675 | } |
9e8a6720 FXC |
676 | |
677 | /* Skip the rest of the line. */ | |
678 | skip_comment_line (); | |
679 | ||
680 | return 1; | |
681 | } | |
682 | ||
683 | ||
08a6b8e0 TB |
684 | /* Return true if GCC$ was matched. */ |
685 | static bool | |
686 | skip_gcc_attribute (locus start) | |
687 | { | |
688 | bool r = false; | |
689 | char c; | |
690 | locus old_loc = gfc_current_locus; | |
691 | ||
692 | if ((c = next_char ()) == 'g' || c == 'G') | |
693 | if ((c = next_char ()) == 'c' || c == 'C') | |
694 | if ((c = next_char ()) == 'c' || c == 'C') | |
695 | if ((c = next_char ()) == '$') | |
696 | r = true; | |
697 | ||
698 | if (r == false) | |
699 | gfc_current_locus = old_loc; | |
700 | else | |
701 | { | |
702 | gcc_attribute_flag = 1; | |
703 | gcc_attribute_locus = old_loc; | |
704 | gfc_current_locus = start; | |
705 | } | |
706 | ||
707 | return r; | |
708 | } | |
709 | ||
710 | ||
711 | ||
6de9cd9a | 712 | /* Comment lines are null lines, lines containing only blanks or lines |
0d3abf6f JJ |
713 | on which the first nonblank line is a '!'. |
714 | Return true if !$ openmp conditional compilation sentinel was | |
715 | seen. */ | |
6de9cd9a | 716 | |
0d3abf6f | 717 | static bool |
6de9cd9a DN |
718 | skip_free_comments (void) |
719 | { | |
720 | locus start; | |
8fc541d3 | 721 | gfc_char_t c; |
6c7a4dfd | 722 | int at_bol; |
6de9cd9a DN |
723 | |
724 | for (;;) | |
725 | { | |
6c7a4dfd | 726 | at_bol = gfc_at_bol (); |
63645982 | 727 | start = gfc_current_locus; |
6de9cd9a DN |
728 | if (gfc_at_eof ()) |
729 | break; | |
730 | ||
731 | do | |
6c7a4dfd | 732 | c = next_char (); |
6de9cd9a DN |
733 | while (gfc_is_whitespace (c)); |
734 | ||
735 | if (c == '\n') | |
736 | { | |
737 | gfc_advance_line (); | |
738 | continue; | |
739 | } | |
740 | ||
741 | if (c == '!') | |
742 | { | |
08a6b8e0 | 743 | /* Keep the !GCC$ line. */ |
90c4f6ba | 744 | if (at_bol && skip_gcc_attribute (start)) |
08a6b8e0 TB |
745 | return false; |
746 | ||
6c7a4dfd JJ |
747 | /* If -fopenmp, we need to handle here 2 things: |
748 | 1) don't treat !$omp as comments, but directives | |
749 | 2) handle OpenMP conditional compilation, where | |
750 | !$ should be treated as 2 spaces (for initial lines | |
751 | only if followed by space). */ | |
92d28cbb JJ |
752 | if ((gfc_option.gfc_flag_openmp |
753 | || gfc_option.gfc_flag_openmp_simd) && at_bol) | |
6c7a4dfd JJ |
754 | { |
755 | locus old_loc = gfc_current_locus; | |
756 | if (next_char () == '$') | |
757 | { | |
758 | c = next_char (); | |
759 | if (c == 'o' || c == 'O') | |
760 | { | |
761 | if (((c = next_char ()) == 'm' || c == 'M') | |
9fa6cfec | 762 | && ((c = next_char ()) == 'p' || c == 'P')) |
6c7a4dfd | 763 | { |
a68ab351 JJ |
764 | if ((c = next_char ()) == ' ' || c == '\t' |
765 | || continue_flag) | |
6c7a4dfd | 766 | { |
9fa6cfec TB |
767 | while (gfc_is_whitespace (c)) |
768 | c = next_char (); | |
769 | if (c != '\n' && c != '!') | |
770 | { | |
771 | openmp_flag = 1; | |
772 | openmp_locus = old_loc; | |
773 | gfc_current_locus = start; | |
774 | return false; | |
775 | } | |
6c7a4dfd | 776 | } |
9fa6cfec | 777 | else |
4daa149b TB |
778 | gfc_warning_now_1 ("!$OMP at %C starts a commented " |
779 | "line as it neither is followed " | |
780 | "by a space nor is a " | |
781 | "continuation line"); | |
6c7a4dfd JJ |
782 | } |
783 | gfc_current_locus = old_loc; | |
784 | next_char (); | |
785 | c = next_char (); | |
786 | } | |
a68ab351 | 787 | if (continue_flag || c == ' ' || c == '\t') |
6c7a4dfd JJ |
788 | { |
789 | gfc_current_locus = old_loc; | |
790 | next_char (); | |
b30c6a0d | 791 | openmp_flag = 0; |
0d3abf6f | 792 | return true; |
6c7a4dfd JJ |
793 | } |
794 | } | |
795 | gfc_current_locus = old_loc; | |
796 | } | |
6de9cd9a DN |
797 | skip_comment_line (); |
798 | continue; | |
799 | } | |
800 | ||
801 | break; | |
802 | } | |
803 | ||
6c7a4dfd JJ |
804 | if (openmp_flag && at_bol) |
805 | openmp_flag = 0; | |
08a6b8e0 TB |
806 | |
807 | gcc_attribute_flag = 0; | |
63645982 | 808 | gfc_current_locus = start; |
0d3abf6f | 809 | return false; |
6de9cd9a DN |
810 | } |
811 | ||
812 | ||
813 | /* Skip comment lines in fixed source mode. We have the same rules as | |
814 | in skip_free_comment(), except that we can have a 'c', 'C' or '*' | |
e0bcf78c TS |
815 | in column 1, and a '!' cannot be in column 6. Also, we deal with |
816 | lines with 'd' or 'D' in column 1, if the user requested this. */ | |
6de9cd9a DN |
817 | |
818 | static void | |
819 | skip_fixed_comments (void) | |
820 | { | |
821 | locus start; | |
822 | int col; | |
8fc541d3 | 823 | gfc_char_t c; |
6de9cd9a | 824 | |
6c7a4dfd JJ |
825 | if (! gfc_at_bol ()) |
826 | { | |
827 | start = gfc_current_locus; | |
828 | if (! gfc_at_eof ()) | |
829 | { | |
830 | do | |
831 | c = next_char (); | |
832 | while (gfc_is_whitespace (c)); | |
833 | ||
834 | if (c == '\n') | |
835 | gfc_advance_line (); | |
836 | else if (c == '!') | |
837 | skip_comment_line (); | |
838 | } | |
839 | ||
840 | if (! gfc_at_bol ()) | |
841 | { | |
842 | gfc_current_locus = start; | |
843 | return; | |
844 | } | |
845 | } | |
846 | ||
6de9cd9a DN |
847 | for (;;) |
848 | { | |
63645982 | 849 | start = gfc_current_locus; |
6de9cd9a DN |
850 | if (gfc_at_eof ()) |
851 | break; | |
852 | ||
853 | c = next_char (); | |
854 | if (c == '\n') | |
855 | { | |
856 | gfc_advance_line (); | |
857 | continue; | |
858 | } | |
859 | ||
860 | if (c == '!' || c == 'c' || c == 'C' || c == '*') | |
861 | { | |
08a6b8e0 TB |
862 | if (skip_gcc_attribute (start)) |
863 | { | |
864 | /* Canonicalize to *$omp. */ | |
865 | *start.nextc = '*'; | |
866 | return; | |
867 | } | |
868 | ||
6c7a4dfd JJ |
869 | /* If -fopenmp, we need to handle here 2 things: |
870 | 1) don't treat !$omp|c$omp|*$omp as comments, but directives | |
871 | 2) handle OpenMP conditional compilation, where | |
872 | !$|c$|*$ should be treated as 2 spaces if the characters | |
873 | in columns 3 to 6 are valid fixed form label columns | |
874 | characters. */ | |
f449022d JD |
875 | if (gfc_current_locus.lb != NULL |
876 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
877 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
878 | ||
92d28cbb | 879 | if (gfc_option.gfc_flag_openmp || gfc_option.gfc_flag_openmp_simd) |
6c7a4dfd JJ |
880 | { |
881 | if (next_char () == '$') | |
882 | { | |
883 | c = next_char (); | |
884 | if (c == 'o' || c == 'O') | |
885 | { | |
886 | if (((c = next_char ()) == 'm' || c == 'M') | |
887 | && ((c = next_char ()) == 'p' || c == 'P')) | |
888 | { | |
889 | c = next_char (); | |
890 | if (c != '\n' | |
891 | && ((openmp_flag && continue_flag) | |
a68ab351 | 892 | || c == ' ' || c == '\t' || c == '0')) |
6c7a4dfd | 893 | { |
a68ab351 | 894 | do |
6c7a4dfd | 895 | c = next_char (); |
a68ab351 | 896 | while (gfc_is_whitespace (c)); |
6c7a4dfd JJ |
897 | if (c != '\n' && c != '!') |
898 | { | |
899 | /* Canonicalize to *$omp. */ | |
900 | *start.nextc = '*'; | |
901 | openmp_flag = 1; | |
902 | gfc_current_locus = start; | |
903 | return; | |
904 | } | |
905 | } | |
906 | } | |
907 | } | |
908 | else | |
909 | { | |
910 | int digit_seen = 0; | |
911 | ||
912 | for (col = 3; col < 6; col++, c = next_char ()) | |
913 | if (c == ' ') | |
914 | continue; | |
a68ab351 JJ |
915 | else if (c == '\t') |
916 | { | |
917 | col = 6; | |
918 | break; | |
919 | } | |
6c7a4dfd JJ |
920 | else if (c < '0' || c > '9') |
921 | break; | |
922 | else | |
923 | digit_seen = 1; | |
924 | ||
925 | if (col == 6 && c != '\n' | |
926 | && ((continue_flag && !digit_seen) | |
a68ab351 | 927 | || c == ' ' || c == '\t' || c == '0')) |
6c7a4dfd JJ |
928 | { |
929 | gfc_current_locus = start; | |
930 | start.nextc[0] = ' '; | |
931 | start.nextc[1] = ' '; | |
932 | continue; | |
933 | } | |
934 | } | |
935 | } | |
936 | gfc_current_locus = start; | |
937 | } | |
6de9cd9a DN |
938 | skip_comment_line (); |
939 | continue; | |
940 | } | |
941 | ||
e0bcf78c TS |
942 | if (gfc_option.flag_d_lines != -1 && (c == 'd' || c == 'D')) |
943 | { | |
944 | if (gfc_option.flag_d_lines == 0) | |
945 | { | |
946 | skip_comment_line (); | |
947 | continue; | |
948 | } | |
949 | else | |
950 | *start.nextc = c = ' '; | |
951 | } | |
952 | ||
6de9cd9a | 953 | col = 1; |
e0bcf78c TS |
954 | |
955 | while (gfc_is_whitespace (c)) | |
6de9cd9a DN |
956 | { |
957 | c = next_char (); | |
958 | col++; | |
959 | } | |
6de9cd9a DN |
960 | |
961 | if (c == '\n') | |
962 | { | |
963 | gfc_advance_line (); | |
964 | continue; | |
965 | } | |
966 | ||
967 | if (col != 6 && c == '!') | |
968 | { | |
f449022d JD |
969 | if (gfc_current_locus.lb != NULL |
970 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
971 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
6de9cd9a DN |
972 | skip_comment_line (); |
973 | continue; | |
974 | } | |
975 | ||
976 | break; | |
977 | } | |
978 | ||
6c7a4dfd | 979 | openmp_flag = 0; |
08a6b8e0 | 980 | gcc_attribute_flag = 0; |
63645982 | 981 | gfc_current_locus = start; |
6de9cd9a DN |
982 | } |
983 | ||
984 | ||
6c7a4dfd | 985 | /* Skips the current line if it is a comment. */ |
6de9cd9a DN |
986 | |
987 | void | |
988 | gfc_skip_comments (void) | |
989 | { | |
6c7a4dfd | 990 | if (gfc_current_form == FORM_FREE) |
6de9cd9a DN |
991 | skip_free_comments (); |
992 | else | |
993 | skip_fixed_comments (); | |
994 | } | |
995 | ||
996 | ||
997 | /* Get the next character from the input, taking continuation lines | |
998 | and end-of-line comments into account. This implies that comment | |
999 | lines between continued lines must be eaten here. For higher-level | |
1000 | subroutines, this flattens continued lines into a single logical | |
1001 | line. The in_string flag denotes whether we're inside a character | |
1002 | context or not. */ | |
1003 | ||
8fc541d3 | 1004 | gfc_char_t |
696abb30 | 1005 | gfc_next_char_literal (gfc_instring in_string) |
6de9cd9a DN |
1006 | { |
1007 | locus old_loc; | |
8fc541d3 FXC |
1008 | int i, prev_openmp_flag; |
1009 | gfc_char_t c; | |
6de9cd9a DN |
1010 | |
1011 | continue_flag = 0; | |
1012 | ||
1013 | restart: | |
1014 | c = next_char (); | |
1015 | if (gfc_at_end ()) | |
5a06474c JD |
1016 | { |
1017 | continue_count = 0; | |
1018 | return c; | |
1019 | } | |
6de9cd9a | 1020 | |
d4fa05b9 | 1021 | if (gfc_current_form == FORM_FREE) |
6de9cd9a | 1022 | { |
0d3abf6f JJ |
1023 | bool openmp_cond_flag; |
1024 | ||
6de9cd9a DN |
1025 | if (!in_string && c == '!') |
1026 | { | |
08a6b8e0 TB |
1027 | if (gcc_attribute_flag |
1028 | && memcmp (&gfc_current_locus, &gcc_attribute_locus, | |
1029 | sizeof (gfc_current_locus)) == 0) | |
1030 | goto done; | |
1031 | ||
6c7a4dfd JJ |
1032 | if (openmp_flag |
1033 | && memcmp (&gfc_current_locus, &openmp_locus, | |
1034 | sizeof (gfc_current_locus)) == 0) | |
1035 | goto done; | |
1036 | ||
6de9cd9a DN |
1037 | /* This line can't be continued */ |
1038 | do | |
1039 | { | |
1040 | c = next_char (); | |
1041 | } | |
1042 | while (c != '\n'); | |
1043 | ||
a34938be RG |
1044 | /* Avoid truncation warnings for comment ending lines. */ |
1045 | gfc_current_locus.lb->truncated = 0; | |
1046 | ||
6de9cd9a DN |
1047 | goto done; |
1048 | } | |
1049 | ||
ac64eec4 JD |
1050 | /* Check to see if the continuation line was truncated. */ |
1051 | if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL | |
1052 | && gfc_current_locus.lb->truncated) | |
1053 | { | |
1054 | int maxlen = gfc_option.free_line_length; | |
021aa628 TB |
1055 | gfc_char_t *current_nextc = gfc_current_locus.nextc; |
1056 | ||
ac64eec4 | 1057 | gfc_current_locus.lb->truncated = 0; |
021aa628 | 1058 | gfc_current_locus.nextc = gfc_current_locus.lb->line + maxlen; |
4daa149b | 1059 | gfc_warning_now_1 ("Line truncated at %L", &gfc_current_locus); |
021aa628 | 1060 | gfc_current_locus.nextc = current_nextc; |
ac64eec4 JD |
1061 | } |
1062 | ||
6de9cd9a DN |
1063 | if (c != '&') |
1064 | goto done; | |
1065 | ||
1066 | /* If the next nonblank character is a ! or \n, we've got a | |
6c7a4dfd | 1067 | continuation line. */ |
63645982 | 1068 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1069 | |
1070 | c = next_char (); | |
1071 | while (gfc_is_whitespace (c)) | |
1072 | c = next_char (); | |
1073 | ||
1074 | /* Character constants to be continued cannot have commentary | |
6c7a4dfd | 1075 | after the '&'. */ |
6de9cd9a DN |
1076 | |
1077 | if (in_string && c != '\n') | |
1078 | { | |
63645982 | 1079 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1080 | c = '&'; |
1081 | goto done; | |
1082 | } | |
1083 | ||
1084 | if (c != '!' && c != '\n') | |
1085 | { | |
63645982 | 1086 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1087 | c = '&'; |
1088 | goto done; | |
1089 | } | |
1090 | ||
6c7a4dfd | 1091 | prev_openmp_flag = openmp_flag; |
6de9cd9a DN |
1092 | continue_flag = 1; |
1093 | if (c == '!') | |
1094 | skip_comment_line (); | |
1095 | else | |
1096 | gfc_advance_line (); | |
0267ffdc | 1097 | |
524af0d6 | 1098 | if (gfc_at_eof ()) |
0267ffdc | 1099 | goto not_continuation; |
6de9cd9a | 1100 | |
5a06474c JD |
1101 | /* We've got a continuation line. If we are on the very next line after |
1102 | the last continuation, increment the continuation line count and | |
1103 | check whether the limit has been exceeded. */ | |
5ffeb913 | 1104 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) |
5a06474c JD |
1105 | { |
1106 | if (++continue_count == gfc_option.max_continue_free) | |
1107 | { | |
edf1eac2 SK |
1108 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) |
1109 | gfc_warning ("Limit of %d continuations exceeded in " | |
1110 | "statement at %C", gfc_option.max_continue_free); | |
5a06474c JD |
1111 | } |
1112 | } | |
5a06474c JD |
1113 | |
1114 | /* Now find where it continues. First eat any comment lines. */ | |
0d3abf6f | 1115 | openmp_cond_flag = skip_free_comments (); |
6de9cd9a | 1116 | |
f449022d JD |
1117 | if (gfc_current_locus.lb != NULL |
1118 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
1119 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); | |
1120 | ||
6c7a4dfd JJ |
1121 | if (prev_openmp_flag != openmp_flag) |
1122 | { | |
1123 | gfc_current_locus = old_loc; | |
1124 | openmp_flag = prev_openmp_flag; | |
1125 | c = '&'; | |
1126 | goto done; | |
1127 | } | |
1128 | ||
6de9cd9a | 1129 | /* Now that we have a non-comment line, probe ahead for the |
6c7a4dfd JJ |
1130 | first non-whitespace character. If it is another '&', then |
1131 | reading starts at the next character, otherwise we must back | |
1132 | up to where the whitespace started and resume from there. */ | |
6de9cd9a | 1133 | |
63645982 | 1134 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1135 | |
1136 | c = next_char (); | |
1137 | while (gfc_is_whitespace (c)) | |
1138 | c = next_char (); | |
1139 | ||
6c7a4dfd JJ |
1140 | if (openmp_flag) |
1141 | { | |
1142 | for (i = 0; i < 5; i++, c = next_char ()) | |
1143 | { | |
8fc541d3 | 1144 | gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$omp"[i]); |
6c7a4dfd JJ |
1145 | if (i == 4) |
1146 | old_loc = gfc_current_locus; | |
1147 | } | |
1148 | while (gfc_is_whitespace (c)) | |
1149 | c = next_char (); | |
1150 | } | |
1151 | ||
6de9cd9a | 1152 | if (c != '&') |
3fbab549 | 1153 | { |
5a06474c JD |
1154 | if (in_string) |
1155 | { | |
5a06474c | 1156 | gfc_current_locus.nextc--; |
696abb30 JD |
1157 | if (gfc_option.warn_ampersand && in_string == INSTRING_WARN) |
1158 | gfc_warning ("Missing '&' in continued character " | |
1159 | "constant at %C"); | |
5a06474c | 1160 | } |
0d3abf6f JJ |
1161 | /* Both !$omp and !$ -fopenmp continuation lines have & on the |
1162 | continuation line only optionally. */ | |
1163 | else if (openmp_flag || openmp_cond_flag) | |
1164 | gfc_current_locus.nextc--; | |
5a06474c JD |
1165 | else |
1166 | { | |
1167 | c = ' '; | |
1168 | gfc_current_locus = old_loc; | |
1169 | goto done; | |
1170 | } | |
3fbab549 | 1171 | } |
6de9cd9a | 1172 | } |
b823d9eb | 1173 | else /* Fixed form. */ |
6de9cd9a DN |
1174 | { |
1175 | /* Fixed form continuation. */ | |
1176 | if (!in_string && c == '!') | |
1177 | { | |
1178 | /* Skip comment at end of line. */ | |
1179 | do | |
1180 | { | |
1181 | c = next_char (); | |
1182 | } | |
1183 | while (c != '\n'); | |
a34938be RG |
1184 | |
1185 | /* Avoid truncation warnings for comment ending lines. */ | |
1186 | gfc_current_locus.lb->truncated = 0; | |
6de9cd9a DN |
1187 | } |
1188 | ||
1189 | if (c != '\n') | |
1190 | goto done; | |
1191 | ||
9cd38d51 JD |
1192 | /* Check to see if the continuation line was truncated. */ |
1193 | if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL | |
1194 | && gfc_current_locus.lb->truncated) | |
1195 | { | |
1196 | gfc_current_locus.lb->truncated = 0; | |
4daa149b | 1197 | gfc_warning_now_1 ("Line truncated at %L", &gfc_current_locus); |
9cd38d51 JD |
1198 | } |
1199 | ||
6c7a4dfd | 1200 | prev_openmp_flag = openmp_flag; |
6de9cd9a | 1201 | continue_flag = 1; |
63645982 | 1202 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1203 | |
1204 | gfc_advance_line (); | |
0d3abf6f | 1205 | skip_fixed_comments (); |
6de9cd9a DN |
1206 | |
1207 | /* See if this line is a continuation line. */ | |
6c7a4dfd | 1208 | if (openmp_flag != prev_openmp_flag) |
6de9cd9a | 1209 | { |
6c7a4dfd JJ |
1210 | openmp_flag = prev_openmp_flag; |
1211 | goto not_continuation; | |
6de9cd9a DN |
1212 | } |
1213 | ||
6c7a4dfd JJ |
1214 | if (!openmp_flag) |
1215 | for (i = 0; i < 5; i++) | |
1216 | { | |
1217 | c = next_char (); | |
1218 | if (c != ' ') | |
1219 | goto not_continuation; | |
1220 | } | |
1221 | else | |
1222 | for (i = 0; i < 5; i++) | |
1223 | { | |
1224 | c = next_char (); | |
8fc541d3 | 1225 | if (gfc_wide_tolower (c) != (unsigned char) "*$omp"[i]) |
6c7a4dfd JJ |
1226 | goto not_continuation; |
1227 | } | |
1228 | ||
6de9cd9a | 1229 | c = next_char (); |
6c7a4dfd | 1230 | if (c == '0' || c == ' ' || c == '\n') |
6de9cd9a | 1231 | goto not_continuation; |
5a06474c JD |
1232 | |
1233 | /* We've got a continuation line. If we are on the very next line after | |
1234 | the last continuation, increment the continuation line count and | |
1235 | check whether the limit has been exceeded. */ | |
5ffeb913 | 1236 | if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1) |
5a06474c JD |
1237 | { |
1238 | if (++continue_count == gfc_option.max_continue_fixed) | |
1239 | { | |
edf1eac2 SK |
1240 | if (gfc_notification_std (GFC_STD_GNU) || pedantic) |
1241 | gfc_warning ("Limit of %d continuations exceeded in " | |
1242 | "statement at %C", | |
1243 | gfc_option.max_continue_fixed); | |
5a06474c JD |
1244 | } |
1245 | } | |
1246 | ||
f449022d JD |
1247 | if (gfc_current_locus.lb != NULL |
1248 | && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb)) | |
5ffeb913 | 1249 | continue_line = gfc_linebuf_linenum (gfc_current_locus.lb); |
6de9cd9a DN |
1250 | } |
1251 | ||
1252 | /* Ready to read first character of continuation line, which might | |
1253 | be another continuation line! */ | |
1254 | goto restart; | |
1255 | ||
1256 | not_continuation: | |
1257 | c = '\n'; | |
63645982 | 1258 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1259 | |
1260 | done: | |
5a06474c JD |
1261 | if (c == '\n') |
1262 | continue_count = 0; | |
6de9cd9a DN |
1263 | continue_flag = 0; |
1264 | return c; | |
1265 | } | |
1266 | ||
1267 | ||
1268 | /* Get the next character of input, folded to lowercase. In fixed | |
1269 | form mode, we also ignore spaces. When matcher subroutines are | |
1270 | parsing character literals, they have to call | |
1271 | gfc_next_char_literal(). */ | |
1272 | ||
8fc541d3 | 1273 | gfc_char_t |
6de9cd9a DN |
1274 | gfc_next_char (void) |
1275 | { | |
8fc541d3 | 1276 | gfc_char_t c; |
6de9cd9a DN |
1277 | |
1278 | do | |
1279 | { | |
696abb30 | 1280 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a | 1281 | } |
d4fa05b9 | 1282 | while (gfc_current_form == FORM_FIXED && gfc_is_whitespace (c)); |
6de9cd9a | 1283 | |
8fc541d3 | 1284 | return gfc_wide_tolower (c); |
6de9cd9a DN |
1285 | } |
1286 | ||
8fc541d3 FXC |
1287 | char |
1288 | gfc_next_ascii_char (void) | |
1289 | { | |
1290 | gfc_char_t c = gfc_next_char (); | |
6de9cd9a | 1291 | |
8fc541d3 FXC |
1292 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c |
1293 | : (unsigned char) UCHAR_MAX); | |
1294 | } | |
1295 | ||
1296 | ||
1297 | gfc_char_t | |
6de9cd9a DN |
1298 | gfc_peek_char (void) |
1299 | { | |
1300 | locus old_loc; | |
8fc541d3 | 1301 | gfc_char_t c; |
6de9cd9a | 1302 | |
63645982 | 1303 | old_loc = gfc_current_locus; |
6de9cd9a | 1304 | c = gfc_next_char (); |
63645982 | 1305 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1306 | |
1307 | return c; | |
1308 | } | |
1309 | ||
1310 | ||
8fc541d3 FXC |
1311 | char |
1312 | gfc_peek_ascii_char (void) | |
1313 | { | |
1314 | gfc_char_t c = gfc_peek_char (); | |
1315 | ||
1316 | return (gfc_wide_fits_in_byte (c) ? (unsigned char) c | |
1317 | : (unsigned char) UCHAR_MAX); | |
1318 | } | |
1319 | ||
1320 | ||
6de9cd9a DN |
1321 | /* Recover from an error. We try to get past the current statement |
1322 | and get lined up for the next. The next statement follows a '\n' | |
1323 | or a ';'. We also assume that we are not within a character | |
1324 | constant, and deal with finding a '\'' or '"'. */ | |
1325 | ||
1326 | void | |
1327 | gfc_error_recovery (void) | |
1328 | { | |
8fc541d3 | 1329 | gfc_char_t c, delim; |
6de9cd9a DN |
1330 | |
1331 | if (gfc_at_eof ()) | |
1332 | return; | |
1333 | ||
1334 | for (;;) | |
1335 | { | |
1336 | c = gfc_next_char (); | |
1337 | if (c == '\n' || c == ';') | |
1338 | break; | |
1339 | ||
1340 | if (c != '\'' && c != '"') | |
1341 | { | |
1342 | if (gfc_at_eof ()) | |
1343 | break; | |
1344 | continue; | |
1345 | } | |
1346 | delim = c; | |
1347 | ||
1348 | for (;;) | |
1349 | { | |
1350 | c = next_char (); | |
1351 | ||
1352 | if (c == delim) | |
1353 | break; | |
1354 | if (c == '\n') | |
ba1defa5 | 1355 | return; |
6de9cd9a DN |
1356 | if (c == '\\') |
1357 | { | |
1358 | c = next_char (); | |
1359 | if (c == '\n') | |
ba1defa5 | 1360 | return; |
6de9cd9a DN |
1361 | } |
1362 | } | |
1363 | if (gfc_at_eof ()) | |
1364 | break; | |
1365 | } | |
6de9cd9a DN |
1366 | } |
1367 | ||
1368 | ||
1369 | /* Read ahead until the next character to be read is not whitespace. */ | |
1370 | ||
1371 | void | |
1372 | gfc_gobble_whitespace (void) | |
1373 | { | |
840bd9f7 | 1374 | static int linenum = 0; |
6de9cd9a | 1375 | locus old_loc; |
8fc541d3 | 1376 | gfc_char_t c; |
6de9cd9a DN |
1377 | |
1378 | do | |
1379 | { | |
63645982 | 1380 | old_loc = gfc_current_locus; |
696abb30 | 1381 | c = gfc_next_char_literal (NONSTRING); |
840bd9f7 SK |
1382 | /* Issue a warning for nonconforming tabs. We keep track of the line |
1383 | number because the Fortran matchers will often back up and the same | |
1384 | line will be scanned multiple times. */ | |
16db2a6a | 1385 | if (warn_tabs && c == '\t') |
840bd9f7 | 1386 | { |
45a82bd9 | 1387 | int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location); |
45a82bd9 PB |
1388 | if (cur_linenum != linenum) |
1389 | { | |
1390 | linenum = cur_linenum; | |
4daa149b | 1391 | gfc_warning_now_1 ("Nonconforming tab character at %C"); |
45a82bd9 | 1392 | } |
840bd9f7 | 1393 | } |
6de9cd9a DN |
1394 | } |
1395 | while (gfc_is_whitespace (c)); | |
1396 | ||
63645982 | 1397 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1398 | } |
1399 | ||
1400 | ||
f56c5d5d TS |
1401 | /* Load a single line into pbuf. |
1402 | ||
1403 | If pbuf points to a NULL pointer, it is allocated. | |
1404 | We truncate lines that are too long, unless we're dealing with | |
1405 | preprocessor lines or if the option -ffixed-line-length-none is set, | |
1406 | in which case we reallocate the buffer to fit the entire line, if | |
1407 | need be. | |
1408 | In fixed mode, we expand a tab that occurs within the statement | |
1409 | label region to expand to spaces that leave the next character in | |
ba1defa5 | 1410 | the source region. |
f2f5443c FXC |
1411 | |
1412 | If first_char is not NULL, it's a pointer to a single char value holding | |
1413 | the first character of the line, which has already been read by the | |
1414 | caller. This avoids the use of ungetc(). | |
1415 | ||
1526c4b5 JD |
1416 | load_line returns whether the line was truncated. |
1417 | ||
1418 | NOTE: The error machinery isn't available at this point, so we can't | |
1419 | easily report line and column numbers consistent with other | |
1420 | parts of gfortran. */ | |
6de9cd9a | 1421 | |
ba1defa5 | 1422 | static int |
f2f5443c | 1423 | load_line (FILE *input, gfc_char_t **pbuf, int *pbuflen, const int *first_char) |
6de9cd9a | 1424 | { |
840bd9f7 | 1425 | static int linenum = 0, current_line = 1; |
d1e3d6ae | 1426 | int c, maxlen, i, preprocessor_flag, buflen = *pbuflen; |
840bd9f7 | 1427 | int trunc_flag = 0, seen_comment = 0; |
ac64eec4 | 1428 | int seen_printable = 0, seen_ampersand = 0, quoted = ' '; |
8fc541d3 | 1429 | gfc_char_t *buffer; |
fd1935d5 | 1430 | bool found_tab = false; |
f56c5d5d | 1431 | |
1dde8683 | 1432 | /* Determine the maximum allowed line length. */ |
f56c5d5d | 1433 | if (gfc_current_form == FORM_FREE) |
1dde8683 | 1434 | maxlen = gfc_option.free_line_length; |
16ab8e74 | 1435 | else if (gfc_current_form == FORM_FIXED) |
1dde8683 | 1436 | maxlen = gfc_option.fixed_line_length; |
f56c5d5d | 1437 | else |
16ab8e74 | 1438 | maxlen = 72; |
f56c5d5d TS |
1439 | |
1440 | if (*pbuf == NULL) | |
1441 | { | |
1dde8683 BM |
1442 | /* Allocate the line buffer, storing its length into buflen. |
1443 | Note that if maxlen==0, indicating that arbitrary-length lines | |
1444 | are allowed, the buffer will be reallocated if this length is | |
1445 | insufficient; since 132 characters is the length of a standard | |
1446 | free-form line, we use that as a starting guess. */ | |
f56c5d5d TS |
1447 | if (maxlen > 0) |
1448 | buflen = maxlen; | |
1449 | else | |
1dde8683 | 1450 | buflen = 132; |
6de9cd9a | 1451 | |
00660189 | 1452 | *pbuf = gfc_get_wide_string (buflen + 1); |
f56c5d5d | 1453 | } |
6de9cd9a DN |
1454 | |
1455 | i = 0; | |
f56c5d5d | 1456 | buffer = *pbuf; |
6de9cd9a | 1457 | |
f2f5443c FXC |
1458 | if (first_char) |
1459 | c = *first_char; | |
1460 | else | |
1461 | c = getc (input); | |
1462 | ||
1463 | /* In order to not truncate preprocessor lines, we have to | |
1464 | remember that this is one. */ | |
1465 | preprocessor_flag = (c == '#' ? 1 : 0); | |
fa841200 | 1466 | |
6de9cd9a DN |
1467 | for (;;) |
1468 | { | |
6de9cd9a DN |
1469 | if (c == EOF) |
1470 | break; | |
f2f5443c | 1471 | |
6de9cd9a | 1472 | if (c == '\n') |
1526c4b5 JD |
1473 | { |
1474 | /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */ | |
1475 | if (gfc_current_form == FORM_FREE | |
c284e499 | 1476 | && !seen_printable && seen_ampersand) |
1526c4b5 JD |
1477 | { |
1478 | if (pedantic) | |
4daa149b TB |
1479 | gfc_error_now ("%<&%> not allowed by itself in line %d", |
1480 | current_line); | |
1526c4b5 | 1481 | else |
4daa149b TB |
1482 | gfc_warning_now ("%<&%> not allowed by itself in line %d", |
1483 | current_line); | |
1526c4b5 JD |
1484 | } |
1485 | break; | |
1486 | } | |
6de9cd9a | 1487 | |
f2f5443c FXC |
1488 | if (c == '\r' || c == '\0') |
1489 | goto next_char; /* Gobble characters. */ | |
6de9cd9a | 1490 | |
1526c4b5 | 1491 | if (c == '&') |
1526c4b5 | 1492 | { |
c284e499 | 1493 | if (seen_ampersand) |
47b0b4fa TB |
1494 | { |
1495 | seen_ampersand = 0; | |
1496 | seen_printable = 1; | |
1497 | } | |
1526c4b5 | 1498 | else |
c284e499 | 1499 | seen_ampersand = 1; |
1526c4b5 JD |
1500 | } |
1501 | ||
bd5db9de | 1502 | if ((c != '&' && c != '!' && c != ' ') || (c == '!' && !seen_ampersand)) |
c284e499 JD |
1503 | seen_printable = 1; |
1504 | ||
840bd9f7 SK |
1505 | /* Is this a fixed-form comment? */ |
1506 | if (gfc_current_form == FORM_FIXED && i == 0 | |
1507 | && (c == '*' || c == 'c' || c == 'd')) | |
1508 | seen_comment = 1; | |
1509 | ||
ac64eec4 JD |
1510 | if (quoted == ' ') |
1511 | { | |
1512 | if (c == '\'' || c == '"') | |
1513 | quoted = c; | |
1514 | } | |
1515 | else if (c == quoted) | |
1516 | quoted = ' '; | |
1517 | ||
1518 | /* Is this a free-form comment? */ | |
1519 | if (c == '!' && quoted == ' ') | |
1520 | seen_comment = 1; | |
1521 | ||
fd1935d5 TB |
1522 | /* Vendor extension: "<tab>1" marks a continuation line. */ |
1523 | if (found_tab) | |
840bd9f7 | 1524 | { |
fd1935d5 TB |
1525 | found_tab = false; |
1526 | if (c >= '1' && c <= '9') | |
1527 | { | |
1528 | *(buffer-1) = c; | |
f2f5443c | 1529 | goto next_char; |
fd1935d5 TB |
1530 | } |
1531 | } | |
1532 | ||
1533 | if (gfc_current_form == FORM_FIXED && c == '\t' && i < 6) | |
1534 | { | |
1535 | found_tab = true; | |
1536 | ||
16db2a6a | 1537 | if (warn_tabs && seen_comment == 0 && current_line != linenum) |
840bd9f7 SK |
1538 | { |
1539 | linenum = current_line; | |
4daa149b TB |
1540 | gfc_warning_now (OPT_Wtabs, |
1541 | "Nonconforming tab character in column %d " | |
1542 | "of line %d", i+1, linenum); | |
840bd9f7 SK |
1543 | } |
1544 | ||
fd1935d5 | 1545 | while (i < 6) |
6de9cd9a DN |
1546 | { |
1547 | *buffer++ = ' '; | |
1548 | i++; | |
1549 | } | |
1550 | ||
f2f5443c | 1551 | goto next_char; |
6de9cd9a DN |
1552 | } |
1553 | ||
1554 | *buffer++ = c; | |
1555 | i++; | |
1556 | ||
d1e3d6ae | 1557 | if (maxlen == 0 || preprocessor_flag) |
f56c5d5d | 1558 | { |
d1e3d6ae JJ |
1559 | if (i >= buflen) |
1560 | { | |
1561 | /* Reallocate line buffer to double size to hold the | |
3fbab549 | 1562 | overlong line. */ |
d1e3d6ae | 1563 | buflen = buflen * 2; |
ece3f663 | 1564 | *pbuf = XRESIZEVEC (gfc_char_t, *pbuf, (buflen + 1)); |
edf1eac2 | 1565 | buffer = (*pbuf) + i; |
d1e3d6ae | 1566 | } |
f56c5d5d | 1567 | } |
d1e3d6ae | 1568 | else if (i >= maxlen) |
16ab8e74 | 1569 | { |
ac64eec4 JD |
1570 | bool trunc_warn = true; |
1571 | ||
1572 | /* Enhancement, if the very next non-space character is an ampersand | |
1573 | or comment that we would otherwise warn about, don't mark as | |
1574 | truncated. */ | |
1575 | ||
f56c5d5d | 1576 | /* Truncate the rest of the line. */ |
6de9cd9a DN |
1577 | for (;;) |
1578 | { | |
c4da1827 | 1579 | c = getc (input); |
ac64eec4 | 1580 | if (c == '\r' || c == ' ') |
9c747b97 DF |
1581 | continue; |
1582 | ||
6de9cd9a DN |
1583 | if (c == '\n' || c == EOF) |
1584 | break; | |
a34938be | 1585 | |
ac64eec4 JD |
1586 | if (!trunc_warn && c != '!') |
1587 | trunc_warn = true; | |
1588 | ||
32e4257f JD |
1589 | if (trunc_warn && ((gfc_current_form == FORM_FIXED && c == '&') |
1590 | || c == '!')) | |
ac64eec4 JD |
1591 | trunc_warn = false; |
1592 | ||
1593 | if (c == '!') | |
1594 | seen_comment = 1; | |
1595 | ||
1596 | if (trunc_warn && !seen_comment) | |
1597 | trunc_flag = 1; | |
6de9cd9a DN |
1598 | } |
1599 | ||
f2f5443c FXC |
1600 | c = '\n'; |
1601 | continue; | |
6de9cd9a | 1602 | } |
f2f5443c FXC |
1603 | |
1604 | next_char: | |
1605 | c = getc (input); | |
6de9cd9a DN |
1606 | } |
1607 | ||
f56c5d5d TS |
1608 | /* Pad lines to the selected line length in fixed form. */ |
1609 | if (gfc_current_form == FORM_FIXED | |
043c2d9e | 1610 | && gfc_option.fixed_line_length != 0 |
f56c5d5d TS |
1611 | && !preprocessor_flag |
1612 | && c != EOF) | |
043c2d9e BF |
1613 | { |
1614 | while (i++ < maxlen) | |
1615 | *buffer++ = ' '; | |
1616 | } | |
f56c5d5d | 1617 | |
6de9cd9a | 1618 | *buffer = '\0'; |
d1e3d6ae | 1619 | *pbuflen = buflen; |
840bd9f7 | 1620 | current_line++; |
ba1defa5 RG |
1621 | |
1622 | return trunc_flag; | |
6de9cd9a DN |
1623 | } |
1624 | ||
1625 | ||
d4fa05b9 TS |
1626 | /* Get a gfc_file structure, initialize it and add it to |
1627 | the file stack. */ | |
1628 | ||
1629 | static gfc_file * | |
e0bcf78c | 1630 | get_file (const char *name, enum lc_reason reason ATTRIBUTE_UNUSED) |
d4fa05b9 TS |
1631 | { |
1632 | gfc_file *f; | |
1633 | ||
ece3f663 | 1634 | f = XCNEW (gfc_file); |
d4fa05b9 | 1635 | |
ece3f663 | 1636 | f->filename = xstrdup (name); |
d4fa05b9 TS |
1637 | |
1638 | f->next = file_head; | |
1639 | file_head = f; | |
1640 | ||
60332588 | 1641 | f->up = current_file; |
d4fa05b9 | 1642 | if (current_file != NULL) |
1b271c9b | 1643 | f->inclusion_line = current_file->line; |
d4fa05b9 | 1644 | |
5ffeb913 | 1645 | linemap_add (line_table, reason, false, f->filename, 1); |
c8cc8542 | 1646 | |
d4fa05b9 TS |
1647 | return f; |
1648 | } | |
1649 | ||
8fc541d3 | 1650 | |
d4fa05b9 TS |
1651 | /* Deal with a line from the C preprocessor. The |
1652 | initial octothorp has already been seen. */ | |
6de9cd9a DN |
1653 | |
1654 | static void | |
8fc541d3 | 1655 | preprocessor_line (gfc_char_t *c) |
6de9cd9a | 1656 | { |
d4fa05b9 TS |
1657 | bool flag[5]; |
1658 | int i, line; | |
8fc541d3 | 1659 | gfc_char_t *wide_filename; |
d4fa05b9 | 1660 | gfc_file *f; |
2d7c7df6 | 1661 | int escaped, unescape; |
8fc541d3 | 1662 | char *filename; |
6de9cd9a | 1663 | |
d4fa05b9 TS |
1664 | c++; |
1665 | while (*c == ' ' || *c == '\t') | |
1666 | c++; | |
6de9cd9a | 1667 | |
d4fa05b9 | 1668 | if (*c < '0' || *c > '9') |
fa841200 | 1669 | goto bad_cpp_line; |
6de9cd9a | 1670 | |
8fc541d3 | 1671 | line = wide_atoi (c); |
d4fa05b9 | 1672 | |
8fc541d3 | 1673 | c = wide_strchr (c, ' '); |
fa841200 | 1674 | if (c == NULL) |
4c3a6ca1 JJ |
1675 | { |
1676 | /* No file name given. Set new line number. */ | |
1677 | current_file->line = line; | |
1678 | return; | |
1679 | } | |
d7d528c8 ES |
1680 | |
1681 | /* Skip spaces. */ | |
1682 | while (*c == ' ' || *c == '\t') | |
1683 | c++; | |
1684 | ||
1685 | /* Skip quote. */ | |
1686 | if (*c != '"') | |
fa841200 | 1687 | goto bad_cpp_line; |
d7d528c8 ES |
1688 | ++c; |
1689 | ||
8fc541d3 | 1690 | wide_filename = c; |
d4fa05b9 | 1691 | |
d7d528c8 | 1692 | /* Make filename end at quote. */ |
2d7c7df6 | 1693 | unescape = 0; |
d7d528c8 | 1694 | escaped = false; |
edf1eac2 | 1695 | while (*c && ! (!escaped && *c == '"')) |
d7d528c8 ES |
1696 | { |
1697 | if (escaped) | |
edf1eac2 | 1698 | escaped = false; |
2d7c7df6 JJ |
1699 | else if (*c == '\\') |
1700 | { | |
1701 | escaped = true; | |
1702 | unescape++; | |
1703 | } | |
d7d528c8 ES |
1704 | ++c; |
1705 | } | |
1706 | ||
1707 | if (! *c) | |
fa841200 TS |
1708 | /* Preprocessor line has no closing quote. */ |
1709 | goto bad_cpp_line; | |
d7d528c8 | 1710 | |
d4fa05b9 TS |
1711 | *c++ = '\0'; |
1712 | ||
2d7c7df6 JJ |
1713 | /* Undo effects of cpp_quote_string. */ |
1714 | if (unescape) | |
1715 | { | |
8fc541d3 | 1716 | gfc_char_t *s = wide_filename; |
b0b14c7b | 1717 | gfc_char_t *d = gfc_get_wide_string (c - wide_filename - unescape); |
d7d528c8 | 1718 | |
8fc541d3 | 1719 | wide_filename = d; |
2d7c7df6 JJ |
1720 | while (*s) |
1721 | { | |
1722 | if (*s == '\\') | |
1723 | *d++ = *++s; | |
1724 | else | |
1725 | *d++ = *s; | |
1726 | s++; | |
1727 | } | |
1728 | *d = '\0'; | |
1729 | } | |
d7d528c8 | 1730 | |
d4fa05b9 | 1731 | /* Get flags. */ |
4c3a6ca1 | 1732 | |
1e39a151 | 1733 | flag[1] = flag[2] = flag[3] = flag[4] = false; |
6de9cd9a | 1734 | |
6de9cd9a DN |
1735 | for (;;) |
1736 | { | |
8fc541d3 | 1737 | c = wide_strchr (c, ' '); |
d4fa05b9 TS |
1738 | if (c == NULL) |
1739 | break; | |
6de9cd9a | 1740 | |
d4fa05b9 | 1741 | c++; |
8fc541d3 | 1742 | i = wide_atoi (c); |
6de9cd9a | 1743 | |
d4fa05b9 TS |
1744 | if (1 <= i && i <= 4) |
1745 | flag[i] = true; | |
1746 | } | |
4c3a6ca1 | 1747 | |
8fc541d3 FXC |
1748 | /* Convert the filename in wide characters into a filename in narrow |
1749 | characters. */ | |
00660189 | 1750 | filename = gfc_widechar_to_char (wide_filename, -1); |
8fc541d3 | 1751 | |
d4fa05b9 | 1752 | /* Interpret flags. */ |
4c3a6ca1 | 1753 | |
94b00ee4 | 1754 | if (flag[1]) /* Starting new file. */ |
d4fa05b9 | 1755 | { |
c8cc8542 | 1756 | f = get_file (filename, LC_RENAME); |
1b271c9b | 1757 | add_file_change (f->filename, f->inclusion_line); |
d4fa05b9 TS |
1758 | current_file = f; |
1759 | } | |
4c3a6ca1 | 1760 | |
d4fa05b9 TS |
1761 | if (flag[2]) /* Ending current file. */ |
1762 | { | |
94b00ee4 | 1763 | if (!current_file->up |
ba78087b | 1764 | || filename_cmp (current_file->up->filename, filename) != 0) |
4c3a6ca1 | 1765 | { |
4daa149b TB |
1766 | gfc_warning_now_1 ("%s:%d: file %s left but not entered", |
1767 | current_file->filename, current_file->line, | |
1768 | filename); | |
2d7c7df6 | 1769 | if (unescape) |
cede9502 JM |
1770 | free (wide_filename); |
1771 | free (filename); | |
4c3a6ca1 JJ |
1772 | return; |
1773 | } | |
ee07457b | 1774 | |
1b271c9b | 1775 | add_file_change (NULL, line); |
94b00ee4 | 1776 | current_file = current_file->up; |
ee07457b FXC |
1777 | linemap_add (line_table, LC_RENAME, false, current_file->filename, |
1778 | current_file->line); | |
d4fa05b9 | 1779 | } |
4c3a6ca1 | 1780 | |
d4fa05b9 TS |
1781 | /* The name of the file can be a temporary file produced by |
1782 | cpp. Replace the name if it is different. */ | |
4c3a6ca1 | 1783 | |
ba78087b | 1784 | if (filename_cmp (current_file->filename, filename) != 0) |
d4fa05b9 | 1785 | { |
95213750 LB |
1786 | /* FIXME: we leak the old filename because a pointer to it may be stored |
1787 | in the linemap. Alternative could be using GC or updating linemap to | |
1cc0e193 | 1788 | point to the new name, but there is no API for that currently. */ |
ece3f663 | 1789 | current_file->filename = xstrdup (filename); |
d4fa05b9 | 1790 | } |
fa841200 | 1791 | |
4c3a6ca1 JJ |
1792 | /* Set new line number. */ |
1793 | current_file->line = line; | |
2d7c7df6 | 1794 | if (unescape) |
cede9502 JM |
1795 | free (wide_filename); |
1796 | free (filename); | |
fa841200 TS |
1797 | return; |
1798 | ||
1799 | bad_cpp_line: | |
4daa149b | 1800 | gfc_warning_now_1 ("%s:%d: Illegal preprocessor directive", |
fa841200 TS |
1801 | current_file->filename, current_file->line); |
1802 | current_file->line++; | |
d4fa05b9 TS |
1803 | } |
1804 | ||
1805 | ||
524af0d6 | 1806 | static bool load_file (const char *, const char *, bool); |
d4fa05b9 TS |
1807 | |
1808 | /* include_line()-- Checks a line buffer to see if it is an include | |
1809 | line. If so, we call load_file() recursively to load the included | |
1810 | file. We never return a syntax error because a statement like | |
1811 | "include = 5" is perfectly legal. We return false if no include was | |
1812 | processed or true if we matched an include. */ | |
1813 | ||
1814 | static bool | |
8fc541d3 | 1815 | include_line (gfc_char_t *line) |
d4fa05b9 | 1816 | { |
8fc541d3 FXC |
1817 | gfc_char_t quote, *c, *begin, *stop; |
1818 | char *filename; | |
9b9e4cd6 | 1819 | |
d4fa05b9 | 1820 | c = line; |
9b9e4cd6 | 1821 | |
92d28cbb | 1822 | if (gfc_option.gfc_flag_openmp || gfc_option.gfc_flag_openmp_simd) |
9b9e4cd6 JJ |
1823 | { |
1824 | if (gfc_current_form == FORM_FREE) | |
1825 | { | |
1826 | while (*c == ' ' || *c == '\t') | |
1827 | c++; | |
1828 | if (*c == '!' && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) | |
1829 | c += 3; | |
1830 | } | |
1831 | else | |
1832 | { | |
1833 | if ((*c == '!' || *c == 'c' || *c == 'C' || *c == '*') | |
1834 | && c[1] == '$' && (c[2] == ' ' || c[2] == '\t')) | |
1835 | c += 3; | |
1836 | } | |
1837 | } | |
1838 | ||
d4fa05b9 TS |
1839 | while (*c == ' ' || *c == '\t') |
1840 | c++; | |
1841 | ||
00660189 | 1842 | if (gfc_wide_strncasecmp (c, "include", 7)) |
8fc541d3 | 1843 | return false; |
d4fa05b9 TS |
1844 | |
1845 | c += 7; | |
1846 | while (*c == ' ' || *c == '\t') | |
1847 | c++; | |
1848 | ||
1849 | /* Find filename between quotes. */ | |
1850 | ||
1851 | quote = *c++; | |
1852 | if (quote != '"' && quote != '\'') | |
1853 | return false; | |
1854 | ||
1855 | begin = c; | |
1856 | ||
1857 | while (*c != quote && *c != '\0') | |
1858 | c++; | |
1859 | ||
1860 | if (*c == '\0') | |
1861 | return false; | |
1862 | ||
1863 | stop = c++; | |
1864 | ||
1865 | while (*c == ' ' || *c == '\t') | |
1866 | c++; | |
1867 | ||
1868 | if (*c != '\0' && *c != '!') | |
1869 | return false; | |
1870 | ||
f7b529fa | 1871 | /* We have an include line at this point. */ |
d4fa05b9 TS |
1872 | |
1873 | *stop = '\0'; /* It's ok to trash the buffer, as this line won't be | |
1874 | read by anything else. */ | |
1875 | ||
00660189 | 1876 | filename = gfc_widechar_to_char (begin, -1); |
524af0d6 | 1877 | if (!load_file (filename, NULL, false)) |
abba1823 | 1878 | exit (FATAL_EXIT_CODE); |
570f4691 | 1879 | |
cede9502 | 1880 | free (filename); |
d4fa05b9 TS |
1881 | return true; |
1882 | } | |
1883 | ||
edf1eac2 | 1884 | |
d4fa05b9 TS |
1885 | /* Load a file into memory by calling load_line until the file ends. */ |
1886 | ||
524af0d6 | 1887 | static bool |
e513a086 | 1888 | load_file (const char *realfilename, const char *displayedname, bool initial) |
d4fa05b9 | 1889 | { |
8fc541d3 | 1890 | gfc_char_t *line; |
d4fa05b9 TS |
1891 | gfc_linebuf *b; |
1892 | gfc_file *f; | |
1893 | FILE *input; | |
d1e3d6ae | 1894 | int len, line_len; |
caef7872 | 1895 | bool first_line; |
e513a086 | 1896 | const char *filename; |
892a371f DS |
1897 | /* If realfilename and displayedname are different and non-null then |
1898 | surely realfilename is the preprocessed form of | |
1899 | displayedname. */ | |
1900 | bool preprocessed_p = (realfilename && displayedname | |
1901 | && strcmp (realfilename, displayedname)); | |
e513a086 TB |
1902 | |
1903 | filename = displayedname ? displayedname : realfilename; | |
d4fa05b9 TS |
1904 | |
1905 | for (f = current_file; f; f = f->up) | |
ba78087b | 1906 | if (filename_cmp (filename, f->filename) == 0) |
d4fa05b9 | 1907 | { |
0ee1b105 TB |
1908 | fprintf (stderr, "%s:%d: Error: File '%s' is being included " |
1909 | "recursively\n", current_file->filename, current_file->line, | |
1910 | filename); | |
524af0d6 | 1911 | return false; |
d4fa05b9 TS |
1912 | } |
1913 | ||
1914 | if (initial) | |
1915 | { | |
2d7c7df6 JJ |
1916 | if (gfc_src_file) |
1917 | { | |
1918 | input = gfc_src_file; | |
1919 | gfc_src_file = NULL; | |
1920 | } | |
1921 | else | |
e513a086 | 1922 | input = gfc_open_file (realfilename); |
d4fa05b9 TS |
1923 | if (input == NULL) |
1924 | { | |
4daa149b | 1925 | gfc_error_now ("Can't open file %qs", filename); |
524af0d6 | 1926 | return false; |
d4fa05b9 TS |
1927 | } |
1928 | } | |
1929 | else | |
1930 | { | |
e513a086 | 1931 | input = gfc_open_included_file (realfilename, false, false); |
d4fa05b9 TS |
1932 | if (input == NULL) |
1933 | { | |
0ee1b105 TB |
1934 | fprintf (stderr, "%s:%d: Error: Can't open included file '%s'\n", |
1935 | current_file->filename, current_file->line, filename); | |
524af0d6 | 1936 | return false; |
d4fa05b9 TS |
1937 | } |
1938 | } | |
1939 | ||
892a371f | 1940 | /* Load the file. |
d4fa05b9 | 1941 | |
892a371f DS |
1942 | A "non-initial" file means a file that is being included. In |
1943 | that case we are creating an LC_ENTER map. | |
1944 | ||
1945 | An "initial" file means a main file; one that is not included. | |
1946 | That file has already got at least one (surely more) line map(s) | |
1947 | created by gfc_init. So the subsequent map created in that case | |
1948 | must have LC_RENAME reason. | |
1949 | ||
1950 | This latter case is not true for a preprocessed file. In that | |
1951 | case, although the file is "initial", the line maps created by | |
1952 | gfc_init was used during the preprocessing of the file. Now that | |
1953 | the preprocessing is over and we are being fed the result of that | |
1954 | preprocessing, we need to create a brand new line map for the | |
1955 | preprocessed file, so the reason is going to be LC_ENTER. */ | |
1956 | ||
1957 | f = get_file (filename, (initial && !preprocessed_p) ? LC_RENAME : LC_ENTER); | |
1b271c9b JJ |
1958 | if (!initial) |
1959 | add_file_change (f->filename, f->inclusion_line); | |
d4fa05b9 TS |
1960 | current_file = f; |
1961 | current_file->line = 1; | |
f56c5d5d | 1962 | line = NULL; |
d1e3d6ae | 1963 | line_len = 0; |
caef7872 | 1964 | first_line = true; |
d4fa05b9 | 1965 | |
2d7c7df6 JJ |
1966 | if (initial && gfc_src_preprocessor_lines[0]) |
1967 | { | |
1968 | preprocessor_line (gfc_src_preprocessor_lines[0]); | |
cede9502 | 1969 | free (gfc_src_preprocessor_lines[0]); |
2d7c7df6 JJ |
1970 | gfc_src_preprocessor_lines[0] = NULL; |
1971 | if (gfc_src_preprocessor_lines[1]) | |
1972 | { | |
1973 | preprocessor_line (gfc_src_preprocessor_lines[1]); | |
cede9502 | 1974 | free (gfc_src_preprocessor_lines[1]); |
2d7c7df6 JJ |
1975 | gfc_src_preprocessor_lines[1] = NULL; |
1976 | } | |
1977 | } | |
1978 | ||
16ab8e74 | 1979 | for (;;) |
d4fa05b9 | 1980 | { |
f2f5443c | 1981 | int trunc = load_line (input, &line, &line_len, NULL); |
d4fa05b9 | 1982 | |
8fc541d3 | 1983 | len = gfc_wide_strlen (line); |
6de9cd9a DN |
1984 | if (feof (input) && len == 0) |
1985 | break; | |
1986 | ||
caef7872 FXC |
1987 | /* If this is the first line of the file, it can contain a byte |
1988 | order mark (BOM), which we will ignore: | |
1989 | FF FE is UTF-16 little endian, | |
1990 | FE FF is UTF-16 big endian, | |
1991 | EF BB BF is UTF-8. */ | |
1992 | if (first_line | |
8fc541d3 FXC |
1993 | && ((line_len >= 2 && line[0] == (unsigned char) '\xFF' |
1994 | && line[1] == (unsigned char) '\xFE') | |
1995 | || (line_len >= 2 && line[0] == (unsigned char) '\xFE' | |
1996 | && line[1] == (unsigned char) '\xFF') | |
1997 | || (line_len >= 3 && line[0] == (unsigned char) '\xEF' | |
1998 | && line[1] == (unsigned char) '\xBB' | |
1999 | && line[2] == (unsigned char) '\xBF'))) | |
caef7872 | 2000 | { |
8fc541d3 | 2001 | int n = line[1] == (unsigned char) '\xBB' ? 3 : 2; |
7b901ac4 | 2002 | gfc_char_t *new_char = gfc_get_wide_string (line_len); |
caef7872 | 2003 | |
7b901ac4 | 2004 | wide_strcpy (new_char, &line[n]); |
cede9502 | 2005 | free (line); |
7b901ac4 | 2006 | line = new_char; |
caef7872 FXC |
2007 | len -= n; |
2008 | } | |
2009 | ||
d4fa05b9 TS |
2010 | /* There are three things this line can be: a line of Fortran |
2011 | source, an include line or a C preprocessor directive. */ | |
6de9cd9a | 2012 | |
d4fa05b9 TS |
2013 | if (line[0] == '#') |
2014 | { | |
9e8a6720 FXC |
2015 | /* When -g3 is specified, it's possible that we emit #define |
2016 | and #undef lines, which we need to pass to the middle-end | |
2017 | so that it can emit correct debug info. */ | |
2018 | if (debug_info_level == DINFO_LEVEL_VERBOSE | |
8fc541d3 FXC |
2019 | && (wide_strncmp (line, "#define ", 8) == 0 |
2020 | || wide_strncmp (line, "#undef ", 7) == 0)) | |
9e8a6720 FXC |
2021 | ; |
2022 | else | |
2023 | { | |
2024 | preprocessor_line (line); | |
2025 | continue; | |
2026 | } | |
d4fa05b9 | 2027 | } |
6de9cd9a | 2028 | |
caef7872 FXC |
2029 | /* Preprocessed files have preprocessor lines added before the byte |
2030 | order mark, so first_line is not about the first line of the file | |
2031 | but the first line that's not a preprocessor line. */ | |
2032 | first_line = false; | |
2033 | ||
d4fa05b9 TS |
2034 | if (include_line (line)) |
2035 | { | |
2036 | current_file->line++; | |
2037 | continue; | |
6de9cd9a DN |
2038 | } |
2039 | ||
d4fa05b9 TS |
2040 | /* Add line. */ |
2041 | ||
f7d2e5d4 JB |
2042 | b = XCNEWVAR (gfc_linebuf, gfc_linebuf_header_size |
2043 | + (len + 1) * sizeof (gfc_char_t)); | |
d4fa05b9 | 2044 | |
c8cc8542 | 2045 | b->location |
5ffeb913 | 2046 | = linemap_line_start (line_table, current_file->line++, 120); |
d4fa05b9 | 2047 | b->file = current_file; |
ba1defa5 | 2048 | b->truncated = trunc; |
8fc541d3 | 2049 | wide_strcpy (b->line, line); |
d4fa05b9 TS |
2050 | |
2051 | if (line_head == NULL) | |
2052 | line_head = b; | |
2053 | else | |
2054 | line_tail->next = b; | |
2055 | ||
2056 | line_tail = b; | |
1b271c9b JJ |
2057 | |
2058 | while (file_changes_cur < file_changes_count) | |
2059 | file_changes[file_changes_cur++].lb = b; | |
6de9cd9a | 2060 | } |
d4fa05b9 | 2061 | |
f56c5d5d | 2062 | /* Release the line buffer allocated in load_line. */ |
cede9502 | 2063 | free (line); |
f56c5d5d | 2064 | |
d4fa05b9 TS |
2065 | fclose (input); |
2066 | ||
1b271c9b JJ |
2067 | if (!initial) |
2068 | add_file_change (NULL, current_file->inclusion_line + 1); | |
d4fa05b9 | 2069 | current_file = current_file->up; |
5ffeb913 | 2070 | linemap_add (line_table, LC_LEAVE, 0, NULL, 0); |
524af0d6 | 2071 | return true; |
6de9cd9a DN |
2072 | } |
2073 | ||
2074 | ||
524af0d6 JB |
2075 | /* Open a new file and start scanning from that file. Returns true |
2076 | if everything went OK, false otherwise. If form == FORM_UNKNOWN | |
d4fa05b9 TS |
2077 | it tries to determine the source form from the filename, defaulting |
2078 | to free form. */ | |
6de9cd9a | 2079 | |
524af0d6 | 2080 | bool |
e0bcf78c | 2081 | gfc_new_file (void) |
6de9cd9a | 2082 | { |
524af0d6 | 2083 | bool result; |
6de9cd9a | 2084 | |
670637ee DF |
2085 | if (gfc_cpp_enabled ()) |
2086 | { | |
2087 | result = gfc_cpp_preprocess (gfc_source_file); | |
2088 | if (!gfc_cpp_preprocess_only ()) | |
e513a086 | 2089 | result = load_file (gfc_cpp_temporary_file (), gfc_source_file, true); |
670637ee DF |
2090 | } |
2091 | else | |
e513a086 | 2092 | result = load_file (gfc_source_file, NULL, true); |
6de9cd9a | 2093 | |
63645982 TS |
2094 | gfc_current_locus.lb = line_head; |
2095 | gfc_current_locus.nextc = (line_head == NULL) ? NULL : line_head->line; | |
6de9cd9a | 2096 | |
d4fa05b9 TS |
2097 | #if 0 /* Debugging aid. */ |
2098 | for (; line_head; line_head = line_head->next) | |
6c1abb5c FXC |
2099 | printf ("%s:%3d %s\n", LOCATION_FILE (line_head->location), |
2100 | LOCATION_LINE (line_head->location), line_head->line); | |
6de9cd9a | 2101 | |
abba1823 | 2102 | exit (SUCCESS_EXIT_CODE); |
d4fa05b9 | 2103 | #endif |
6de9cd9a | 2104 | |
d4fa05b9 | 2105 | return result; |
6de9cd9a | 2106 | } |
2d7c7df6 JJ |
2107 | |
2108 | static char * | |
2109 | unescape_filename (const char *ptr) | |
2110 | { | |
2111 | const char *p = ptr, *s; | |
2112 | char *d, *ret; | |
2113 | int escaped, unescape = 0; | |
2114 | ||
2115 | /* Make filename end at quote. */ | |
2116 | escaped = false; | |
2117 | while (*p && ! (! escaped && *p == '"')) | |
2118 | { | |
2119 | if (escaped) | |
2120 | escaped = false; | |
2121 | else if (*p == '\\') | |
2122 | { | |
2123 | escaped = true; | |
2124 | unescape++; | |
2125 | } | |
2126 | ++p; | |
2127 | } | |
2128 | ||
edf1eac2 | 2129 | if (!*p || p[1]) |
2d7c7df6 JJ |
2130 | return NULL; |
2131 | ||
2132 | /* Undo effects of cpp_quote_string. */ | |
2133 | s = ptr; | |
ece3f663 | 2134 | d = XCNEWVEC (char, p + 1 - ptr - unescape); |
2d7c7df6 JJ |
2135 | ret = d; |
2136 | ||
2137 | while (s != p) | |
2138 | { | |
2139 | if (*s == '\\') | |
2140 | *d++ = *++s; | |
2141 | else | |
2142 | *d++ = *s; | |
2143 | s++; | |
2144 | } | |
2145 | *d = '\0'; | |
2146 | return ret; | |
2147 | } | |
2148 | ||
2149 | /* For preprocessed files, if the first tokens are of the form # NUM. | |
2150 | handle the directives so we know the original file name. */ | |
2151 | ||
2152 | const char * | |
2153 | gfc_read_orig_filename (const char *filename, const char **canon_source_file) | |
2154 | { | |
2155 | int c, len; | |
8fc541d3 | 2156 | char *dirname, *tmp; |
2d7c7df6 JJ |
2157 | |
2158 | gfc_src_file = gfc_open_file (filename); | |
2159 | if (gfc_src_file == NULL) | |
2160 | return NULL; | |
2161 | ||
c4da1827 | 2162 | c = getc (gfc_src_file); |
2d7c7df6 JJ |
2163 | |
2164 | if (c != '#') | |
2165 | return NULL; | |
2166 | ||
2167 | len = 0; | |
f2f5443c | 2168 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[0], &len, &c); |
2d7c7df6 | 2169 | |
8fc541d3 | 2170 | if (wide_strncmp (gfc_src_preprocessor_lines[0], "# 1 \"", 5) != 0) |
2d7c7df6 JJ |
2171 | return NULL; |
2172 | ||
00660189 | 2173 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[0][5], -1); |
8fc541d3 | 2174 | filename = unescape_filename (tmp); |
cede9502 | 2175 | free (tmp); |
2d7c7df6 JJ |
2176 | if (filename == NULL) |
2177 | return NULL; | |
2178 | ||
c4da1827 | 2179 | c = getc (gfc_src_file); |
2d7c7df6 JJ |
2180 | |
2181 | if (c != '#') | |
2182 | return filename; | |
2183 | ||
2184 | len = 0; | |
f2f5443c | 2185 | load_line (gfc_src_file, &gfc_src_preprocessor_lines[1], &len, &c); |
2d7c7df6 | 2186 | |
8fc541d3 | 2187 | if (wide_strncmp (gfc_src_preprocessor_lines[1], "# 1 \"", 5) != 0) |
2d7c7df6 JJ |
2188 | return filename; |
2189 | ||
00660189 | 2190 | tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[1][5], -1); |
8fc541d3 | 2191 | dirname = unescape_filename (tmp); |
cede9502 | 2192 | free (tmp); |
2d7c7df6 JJ |
2193 | if (dirname == NULL) |
2194 | return filename; | |
2195 | ||
2196 | len = strlen (dirname); | |
2197 | if (len < 3 || dirname[len - 1] != '/' || dirname[len - 2] != '/') | |
2198 | { | |
cede9502 | 2199 | free (dirname); |
2d7c7df6 JJ |
2200 | return filename; |
2201 | } | |
2202 | dirname[len - 2] = '\0'; | |
2203 | set_src_pwd (dirname); | |
2204 | ||
2205 | if (! IS_ABSOLUTE_PATH (filename)) | |
2206 | { | |
ece3f663 | 2207 | char *p = XCNEWVEC (char, len + strlen (filename)); |
2d7c7df6 JJ |
2208 | |
2209 | memcpy (p, dirname, len - 2); | |
2210 | p[len - 2] = '/'; | |
2211 | strcpy (p + len - 1, filename); | |
2212 | *canon_source_file = p; | |
2213 | } | |
2214 | ||
cede9502 | 2215 | free (dirname); |
2d7c7df6 JJ |
2216 | return filename; |
2217 | } |