]>
Commit | Line | Data |
---|---|---|
6de9cd9a DN |
1 | /* Deal with I/O statements & related stuff. |
2 | Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc. | |
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 | |
9 | Software Foundation; either version 2, or (at your option) any later | |
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 | |
9fc4d79b TS |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
6de9cd9a DN |
21 | |
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "flags.h" | |
25 | ||
26 | #include <string.h> | |
27 | ||
28 | #include "gfortran.h" | |
29 | #include "match.h" | |
30 | #include "parse.h" | |
31 | ||
32 | gfc_st_label format_asterisk = | |
33 | { -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL, 0, | |
34 | {NULL, 0, NULL, NULL}, NULL, NULL}; | |
35 | ||
36 | typedef struct | |
37 | { | |
38 | const char *name, *spec; | |
39 | bt type; | |
40 | } | |
41 | io_tag; | |
42 | ||
43 | static const io_tag | |
44 | tag_file = { "FILE", " file = %e", BT_CHARACTER }, | |
45 | tag_status = { "STATUS", " status = %e", BT_CHARACTER}, | |
46 | tag_e_access = {"ACCESS", " access = %e", BT_CHARACTER}, | |
47 | tag_e_form = {"FORM", " form = %e", BT_CHARACTER}, | |
48 | tag_e_recl = {"RECL", " recl = %e", BT_INTEGER}, | |
49 | tag_e_blank = {"BLANK", " blank = %e", BT_CHARACTER}, | |
50 | tag_e_position = {"POSITION", " position = %e", BT_CHARACTER}, | |
51 | tag_e_action = {"ACTION", " action = %e", BT_CHARACTER}, | |
52 | tag_e_delim = {"DELIM", " delim = %e", BT_CHARACTER}, | |
53 | tag_e_pad = {"PAD", " pad = %e", BT_CHARACTER}, | |
54 | tag_unit = {"UNIT", " unit = %e", BT_INTEGER}, | |
55 | tag_advance = {"ADVANCE", " advance = %e", BT_CHARACTER}, | |
56 | tag_rec = {"REC", " rec = %e", BT_INTEGER}, | |
57 | tag_format = {"FORMAT", NULL, BT_CHARACTER}, | |
58 | tag_iostat = {"IOSTAT", " iostat = %v", BT_INTEGER}, | |
59 | tag_size = {"SIZE", " size = %v", BT_INTEGER}, | |
60 | tag_exist = {"EXIST", " exist = %v", BT_LOGICAL}, | |
61 | tag_opened = {"OPENED", " opened = %v", BT_LOGICAL}, | |
62 | tag_named = {"NAMED", " named = %v", BT_LOGICAL}, | |
63 | tag_name = {"NAME", " name = %v", BT_CHARACTER}, | |
64 | tag_number = {"NUMBER", " number = %v", BT_INTEGER}, | |
65 | tag_s_access = {"ACCESS", " access = %v", BT_CHARACTER}, | |
66 | tag_sequential = {"SEQUENTIAL", " sequential = %v", BT_CHARACTER}, | |
67 | tag_direct = {"DIRECT", " direct = %v", BT_CHARACTER}, | |
68 | tag_s_form = {"FORM", " form = %v", BT_CHARACTER}, | |
69 | tag_formatted = {"FORMATTED", " formatted = %v", BT_CHARACTER}, | |
70 | tag_unformatted = {"UNFORMATTED", " unformatted = %v", BT_CHARACTER}, | |
71 | tag_s_recl = {"RECL", " recl = %v", BT_INTEGER}, | |
72 | tag_nextrec = {"NEXTREC", " nextrec = %v", BT_INTEGER}, | |
73 | tag_s_blank = {"BLANK", " blank = %v", BT_CHARACTER}, | |
74 | tag_s_position = {"POSITION", " position = %v", BT_CHARACTER}, | |
75 | tag_s_action = {"ACTION", " action = %v", BT_CHARACTER}, | |
76 | tag_read = {"READ", " read = %v", BT_CHARACTER}, | |
77 | tag_write = {"WRITE", " write = %v", BT_CHARACTER}, | |
78 | tag_readwrite = {"READWRITE", " readwrite = %v", BT_CHARACTER}, | |
79 | tag_s_delim = {"DELIM", " delim = %v", BT_CHARACTER}, | |
80 | tag_s_pad = {"PAD", " pad = %v", BT_CHARACTER}, | |
81 | tag_iolength = {"IOLENGTH", " iolength = %v", BT_INTEGER}, | |
82 | tag_err = {"ERR", " err = %l", BT_UNKNOWN}, | |
83 | tag_end = {"END", " end = %l", BT_UNKNOWN}, | |
84 | tag_eor = {"EOR", " eor = %l", BT_UNKNOWN}; | |
85 | ||
86 | static gfc_dt *current_dt; | |
87 | ||
88 | #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE; | |
89 | ||
90 | ||
91 | /**************** Fortran 95 FORMAT parser *****************/ | |
92 | ||
93 | /* FORMAT tokens returned by format_lex(). */ | |
94 | typedef enum | |
95 | { | |
96 | FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD, | |
97 | FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN, | |
98 | FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F, | |
99 | FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END | |
100 | } | |
101 | format_token; | |
102 | ||
103 | /* Local variables for checking format strings. The saved_token is | |
104 | used to back up by a single format token during the parsing | |
105 | process. */ | |
106 | static char *format_string; | |
107 | static int format_length, use_last_char; | |
108 | ||
109 | static format_token saved_token; | |
110 | ||
111 | static enum | |
112 | { MODE_STRING, MODE_FORMAT, MODE_COPY } | |
113 | mode; | |
114 | ||
115 | ||
116 | /* Return the next character in the format string. */ | |
117 | ||
118 | static char | |
119 | next_char (int in_string) | |
120 | { | |
121 | static char c; | |
122 | ||
123 | if (use_last_char) | |
124 | { | |
125 | use_last_char = 0; | |
126 | return c; | |
127 | } | |
128 | ||
129 | format_length++; | |
130 | ||
131 | if (mode == MODE_STRING) | |
132 | c = *format_string++; | |
133 | else | |
134 | { | |
135 | c = gfc_next_char_literal (in_string); | |
136 | if (c == '\n') | |
137 | c = '\0'; | |
138 | ||
139 | if (mode == MODE_COPY) | |
140 | *format_string++ = c; | |
141 | } | |
142 | ||
143 | c = TOUPPER (c); | |
144 | return c; | |
145 | } | |
146 | ||
147 | ||
148 | /* Back up one character position. Only works once. */ | |
149 | ||
150 | static void | |
151 | unget_char (void) | |
152 | { | |
153 | ||
154 | use_last_char = 1; | |
155 | } | |
156 | ||
157 | static int value = 0; | |
158 | ||
159 | /* Simple lexical analyzer for getting the next token in a FORMAT | |
160 | statement. */ | |
161 | ||
162 | static format_token | |
163 | format_lex (void) | |
164 | { | |
165 | format_token token; | |
166 | char c, delim; | |
167 | int zflag; | |
168 | int negative_flag; | |
169 | ||
170 | if (saved_token != FMT_NONE) | |
171 | { | |
172 | token = saved_token; | |
173 | saved_token = FMT_NONE; | |
174 | return token; | |
175 | } | |
176 | ||
177 | do | |
178 | { | |
179 | c = next_char (0); | |
180 | } | |
181 | while (gfc_is_whitespace (c)); | |
182 | ||
183 | negative_flag = 0; | |
184 | switch (c) | |
185 | { | |
186 | case '-': | |
187 | negative_flag = 1; | |
188 | case '+': | |
189 | c = next_char (0); | |
190 | if (!ISDIGIT (c)) | |
191 | { | |
192 | token = FMT_UNKNOWN; | |
193 | break; | |
194 | } | |
195 | ||
196 | value = c - '0'; | |
197 | ||
198 | do | |
199 | { | |
200 | c = next_char (0); | |
201 | if(ISDIGIT (c)) | |
202 | value = 10 * value + c - '0'; | |
203 | } | |
204 | while (ISDIGIT (c)); | |
205 | ||
206 | unget_char (); | |
207 | ||
208 | if (negative_flag) | |
209 | value = -value; | |
210 | ||
211 | token = FMT_SIGNED_INT; | |
212 | break; | |
213 | ||
214 | case '0': | |
215 | case '1': | |
216 | case '2': | |
217 | case '3': | |
218 | case '4': | |
219 | case '5': | |
220 | case '6': | |
221 | case '7': | |
222 | case '8': | |
223 | case '9': | |
224 | zflag = (c == '0'); | |
225 | ||
226 | value = c - '0'; | |
227 | ||
228 | do | |
229 | { | |
230 | c = next_char (0); | |
231 | if (c != '0') | |
232 | zflag = 0; | |
233 | if (ISDIGIT (c)) | |
234 | value = 10 * value + c - '0'; | |
235 | } | |
236 | while (ISDIGIT (c)); | |
237 | ||
238 | unget_char (); | |
239 | token = zflag ? FMT_ZERO : FMT_POSINT; | |
240 | break; | |
241 | ||
242 | case '.': | |
243 | token = FMT_PERIOD; | |
244 | break; | |
245 | ||
246 | case ',': | |
247 | token = FMT_COMMA; | |
248 | break; | |
249 | ||
250 | case ':': | |
251 | token = FMT_COLON; | |
252 | break; | |
253 | ||
254 | case '/': | |
255 | token = FMT_SLASH; | |
256 | break; | |
257 | ||
258 | case '$': | |
259 | token = FMT_DOLLAR; | |
260 | break; | |
261 | ||
262 | case 'T': | |
263 | c = next_char (0); | |
264 | if (c != 'L' && c != 'R') | |
265 | unget_char (); | |
266 | ||
267 | token = FMT_POS; | |
268 | break; | |
269 | ||
270 | case '(': | |
271 | token = FMT_LPAREN; | |
272 | break; | |
273 | ||
274 | case ')': | |
275 | token = FMT_RPAREN; | |
276 | break; | |
277 | ||
278 | case 'X': | |
279 | token = FMT_X; | |
280 | break; | |
281 | ||
282 | case 'S': | |
283 | c = next_char (0); | |
284 | if (c != 'P' && c != 'S') | |
285 | unget_char (); | |
286 | ||
287 | token = FMT_SIGN; | |
288 | break; | |
289 | ||
290 | case 'B': | |
291 | c = next_char (0); | |
292 | if (c == 'N' || c == 'Z') | |
293 | token = FMT_BLANK; | |
294 | else | |
295 | { | |
296 | unget_char (); | |
297 | token = FMT_IBOZ; | |
298 | } | |
299 | ||
300 | break; | |
301 | ||
302 | case '\'': | |
303 | case '"': | |
304 | delim = c; | |
305 | ||
306 | value = 0; | |
307 | ||
308 | for (;;) | |
309 | { | |
310 | c = next_char (1); | |
311 | if (c == '\0') | |
312 | { | |
313 | token = FMT_END; | |
314 | break; | |
315 | } | |
316 | ||
317 | if (c == delim) | |
318 | { | |
319 | c = next_char (1); | |
320 | ||
321 | if (c == '\0') | |
322 | { | |
323 | token = FMT_END; | |
324 | break; | |
325 | } | |
326 | ||
327 | if (c != delim) | |
328 | { | |
329 | unget_char (); | |
330 | token = FMT_CHAR; | |
331 | break; | |
332 | } | |
333 | } | |
334 | value++; | |
335 | } | |
336 | break; | |
337 | ||
338 | case 'P': | |
339 | token = FMT_P; | |
340 | break; | |
341 | ||
342 | case 'I': | |
343 | case 'O': | |
344 | case 'Z': | |
345 | token = FMT_IBOZ; | |
346 | break; | |
347 | ||
348 | case 'F': | |
349 | token = FMT_F; | |
350 | break; | |
351 | ||
352 | case 'E': | |
353 | c = next_char (0); | |
354 | if (c == 'N' || c == 'S') | |
355 | token = FMT_EXT; | |
356 | else | |
357 | { | |
358 | token = FMT_E; | |
359 | unget_char (); | |
360 | } | |
361 | ||
362 | break; | |
363 | ||
364 | case 'G': | |
365 | token = FMT_G; | |
366 | break; | |
367 | ||
368 | case 'H': | |
369 | token = FMT_H; | |
370 | break; | |
371 | ||
372 | case 'L': | |
373 | token = FMT_L; | |
374 | break; | |
375 | ||
376 | case 'A': | |
377 | token = FMT_A; | |
378 | break; | |
379 | ||
380 | case 'D': | |
381 | token = FMT_D; | |
382 | break; | |
383 | ||
384 | case '\0': | |
385 | token = FMT_END; | |
386 | break; | |
387 | ||
388 | default: | |
389 | token = FMT_UNKNOWN; | |
390 | break; | |
391 | } | |
392 | ||
393 | return token; | |
394 | } | |
395 | ||
396 | ||
397 | /* Check a format statement. The format string, either from a FORMAT | |
398 | statement or a constant in an I/O statement has already been parsed | |
399 | by itself, and we are checking it for validity. The dual origin | |
400 | means that the warning message is a little less than great. */ | |
401 | ||
402 | static try | |
403 | check_format (void) | |
404 | { | |
405 | const char *posint_required = "Positive width required"; | |
406 | const char *period_required = "Period required"; | |
407 | const char *nonneg_required = "Nonnegative width required"; | |
408 | const char *unexpected_element = "Unexpected element"; | |
409 | const char *unexpected_end = "Unexpected end of format string"; | |
410 | ||
411 | const char *error; | |
412 | format_token t, u; | |
413 | int level; | |
414 | int repeat; | |
415 | try rv; | |
416 | ||
417 | use_last_char = 0; | |
418 | saved_token = FMT_NONE; | |
419 | level = 0; | |
420 | repeat = 0; | |
421 | rv = SUCCESS; | |
422 | ||
423 | t = format_lex (); | |
424 | if (t != FMT_LPAREN) | |
425 | { | |
426 | error = "Missing leading left parenthesis"; | |
427 | goto syntax; | |
428 | } | |
429 | ||
430 | t = format_lex (); | |
431 | if (t == FMT_RPAREN) | |
432 | goto finished; /* Empty format is legal */ | |
433 | saved_token = t; | |
434 | ||
435 | format_item: | |
436 | /* In this state, the next thing has to be a format item. */ | |
437 | t = format_lex (); | |
438 | switch (t) | |
439 | { | |
440 | case FMT_POSINT: | |
441 | repeat = value; | |
442 | t = format_lex (); | |
443 | if (t == FMT_LPAREN) | |
444 | { | |
445 | level++; | |
446 | goto format_item; | |
447 | } | |
448 | ||
449 | if (t == FMT_SLASH) | |
450 | goto optional_comma; | |
451 | ||
452 | goto data_desc; | |
453 | ||
454 | case FMT_LPAREN: | |
455 | level++; | |
456 | goto format_item; | |
457 | ||
458 | case FMT_SIGNED_INT: | |
459 | /* Signed integer can only precede a P format. */ | |
460 | t = format_lex (); | |
461 | if (t != FMT_P) | |
462 | { | |
463 | error = "Expected P edit descriptor"; | |
464 | goto syntax; | |
465 | } | |
466 | ||
467 | goto data_desc; | |
468 | ||
469 | case FMT_P: | |
470 | /* P and X require a prior number. */ | |
471 | error = "P descriptor requires leading scale factor"; | |
472 | goto syntax; | |
473 | ||
474 | case FMT_X: | |
475 | error = "X descriptor requires leading space count"; | |
476 | goto syntax; | |
477 | ||
478 | case FMT_SIGN: | |
479 | case FMT_BLANK: | |
480 | case FMT_CHAR: | |
481 | goto between_desc; | |
482 | ||
483 | case FMT_COLON: | |
484 | case FMT_SLASH: | |
485 | goto optional_comma; | |
486 | ||
487 | case FMT_DOLLAR: | |
488 | t = format_lex (); | |
489 | if (t != FMT_RPAREN || level > 0) | |
490 | { | |
491 | error = "$ must the last specifier"; | |
492 | goto syntax; | |
493 | } | |
494 | ||
495 | goto finished; | |
496 | ||
497 | case FMT_POS: | |
498 | case FMT_IBOZ: | |
499 | case FMT_F: | |
500 | case FMT_E: | |
501 | case FMT_EXT: | |
502 | case FMT_G: | |
503 | case FMT_L: | |
504 | case FMT_A: | |
505 | case FMT_D: | |
506 | goto data_desc; | |
507 | ||
508 | case FMT_H: | |
509 | goto data_desc; | |
510 | ||
511 | case FMT_END: | |
512 | error = unexpected_end; | |
513 | goto syntax; | |
514 | ||
515 | default: | |
516 | error = unexpected_element; | |
517 | goto syntax; | |
518 | } | |
519 | ||
520 | data_desc: | |
521 | /* In this state, t must currently be a data descriptor. | |
522 | Deal with things that can/must follow the descriptor. */ | |
523 | switch (t) | |
524 | { | |
525 | case FMT_SIGN: | |
526 | case FMT_BLANK: | |
527 | case FMT_X: | |
528 | break; | |
529 | ||
530 | case FMT_P: | |
531 | if (pedantic) | |
532 | { | |
533 | t = format_lex (); | |
534 | if (t == FMT_POSINT) | |
535 | { | |
536 | error = "Repeat count cannot follow P descriptor"; | |
537 | goto syntax; | |
538 | } | |
539 | ||
540 | saved_token = t; | |
541 | } | |
542 | ||
543 | goto optional_comma; | |
544 | ||
545 | case FMT_POS: | |
546 | case FMT_L: | |
547 | t = format_lex (); | |
548 | if (t == FMT_POSINT) | |
549 | break; | |
550 | ||
551 | error = posint_required; | |
552 | goto syntax; | |
553 | ||
554 | case FMT_A: | |
555 | t = format_lex (); | |
556 | if (t != FMT_POSINT) | |
557 | saved_token = t; | |
558 | break; | |
559 | ||
560 | case FMT_D: | |
561 | case FMT_E: | |
562 | case FMT_G: | |
563 | case FMT_EXT: | |
564 | u = format_lex (); | |
565 | if (u != FMT_POSINT) | |
566 | { | |
567 | error = posint_required; | |
568 | goto syntax; | |
569 | } | |
570 | ||
571 | u = format_lex (); | |
572 | if (u != FMT_PERIOD) | |
573 | { | |
574 | error = period_required; | |
575 | goto syntax; | |
576 | } | |
577 | ||
578 | u = format_lex (); | |
579 | if (u != FMT_ZERO && u != FMT_POSINT) | |
580 | { | |
581 | error = nonneg_required; | |
582 | goto syntax; | |
583 | } | |
584 | ||
585 | if (t == FMT_D) | |
586 | break; | |
587 | ||
588 | /* Look for optional exponent. */ | |
589 | u = format_lex (); | |
590 | if (u != FMT_E) | |
591 | { | |
592 | saved_token = u; | |
593 | } | |
594 | else | |
595 | { | |
596 | u = format_lex (); | |
597 | if (u != FMT_POSINT) | |
598 | { | |
599 | error = "Positive exponent width required"; | |
600 | goto syntax; | |
601 | } | |
602 | } | |
603 | ||
604 | break; | |
605 | ||
606 | case FMT_F: | |
607 | t = format_lex (); | |
608 | if (t != FMT_ZERO && t != FMT_POSINT) | |
609 | { | |
610 | error = nonneg_required; | |
611 | goto syntax; | |
612 | } | |
613 | ||
614 | t = format_lex (); | |
615 | if (t != FMT_PERIOD) | |
616 | { | |
617 | error = period_required; | |
618 | goto syntax; | |
619 | } | |
620 | ||
621 | t = format_lex (); | |
622 | if (t != FMT_ZERO && t != FMT_POSINT) | |
623 | { | |
624 | error = nonneg_required; | |
625 | goto syntax; | |
626 | } | |
627 | ||
628 | break; | |
629 | ||
630 | case FMT_H: | |
631 | if(mode == MODE_STRING) | |
632 | { | |
633 | format_string += value; | |
634 | format_length -= value; | |
635 | } | |
636 | else | |
637 | { | |
638 | while(repeat >0) | |
639 | { | |
640 | next_char(0); | |
641 | repeat -- ; | |
642 | } | |
643 | } | |
644 | break; | |
645 | ||
646 | case FMT_IBOZ: | |
647 | t = format_lex (); | |
648 | if (t != FMT_ZERO && t != FMT_POSINT) | |
649 | { | |
650 | error = nonneg_required; | |
651 | goto syntax; | |
652 | } | |
653 | ||
654 | t = format_lex (); | |
655 | if (t != FMT_PERIOD) | |
656 | { | |
657 | saved_token = t; | |
658 | } | |
659 | else | |
660 | { | |
661 | t = format_lex (); | |
662 | if (t != FMT_ZERO && t != FMT_POSINT) | |
663 | { | |
664 | error = nonneg_required; | |
665 | goto syntax; | |
666 | } | |
667 | } | |
668 | ||
669 | break; | |
670 | ||
671 | default: | |
672 | error = unexpected_element; | |
673 | goto syntax; | |
674 | } | |
675 | ||
676 | between_desc: | |
677 | /* Between a descriptor and what comes next. */ | |
678 | t = format_lex (); | |
679 | switch (t) | |
680 | { | |
681 | ||
682 | case FMT_COMMA: | |
683 | goto format_item; | |
684 | ||
685 | case FMT_RPAREN: | |
686 | level--; | |
687 | if (level < 0) | |
688 | goto finished; | |
689 | goto between_desc; | |
690 | ||
691 | case FMT_COLON: | |
692 | case FMT_SLASH: | |
693 | goto optional_comma; | |
694 | ||
695 | case FMT_END: | |
696 | error = unexpected_end; | |
697 | goto syntax; | |
698 | ||
699 | default: | |
700 | error = "Missing comma"; | |
701 | goto syntax; | |
702 | } | |
703 | ||
704 | optional_comma: | |
705 | /* Optional comma is a weird between state where we've just finished | |
706 | reading a colon, slash or P descriptor. */ | |
707 | t = format_lex (); | |
708 | switch (t) | |
709 | { | |
710 | case FMT_COMMA: | |
711 | break; | |
712 | ||
713 | case FMT_RPAREN: | |
714 | level--; | |
715 | if (level < 0) | |
716 | goto finished; | |
717 | goto between_desc; | |
718 | ||
719 | default: | |
720 | /* Assume that we have another format item. */ | |
721 | saved_token = t; | |
722 | break; | |
723 | } | |
724 | ||
725 | goto format_item; | |
726 | ||
727 | syntax: | |
728 | /* Something went wrong. If the format we're checking is a string, | |
729 | generate a warning, since the program is correct. If the format | |
730 | is in a FORMAT statement, this messes up parsing, which is an | |
731 | error. */ | |
732 | if (mode != MODE_STRING) | |
733 | gfc_error ("%s in format string at %C", error); | |
734 | else | |
735 | { | |
736 | gfc_warning ("%s in format string at %C", error); | |
737 | ||
738 | /* TODO: More elaborate measures are needed to show where a problem | |
739 | is within a format string that has been calculated. */ | |
740 | } | |
741 | ||
742 | rv = FAILURE; | |
743 | ||
744 | finished: | |
745 | return rv; | |
746 | } | |
747 | ||
748 | ||
749 | /* Given an expression node that is a constant string, see if it looks | |
750 | like a format string. */ | |
751 | ||
752 | static void | |
753 | check_format_string (gfc_expr * e) | |
754 | { | |
755 | ||
756 | mode = MODE_STRING; | |
757 | format_string = e->value.character.string; | |
758 | check_format (); | |
759 | } | |
760 | ||
761 | ||
762 | /************ Fortran 95 I/O statement matchers *************/ | |
763 | ||
764 | /* Match a FORMAT statement. This amounts to actually parsing the | |
765 | format descriptors in order to correctly locate the end of the | |
766 | format string. */ | |
767 | ||
768 | match | |
769 | gfc_match_format (void) | |
770 | { | |
771 | gfc_expr *e; | |
772 | locus start; | |
773 | ||
774 | if (gfc_statement_label == NULL) | |
775 | { | |
776 | gfc_error ("Missing format label at %C"); | |
777 | return MATCH_ERROR; | |
778 | } | |
779 | gfc_gobble_whitespace (); | |
780 | ||
781 | mode = MODE_FORMAT; | |
782 | format_length = 0; | |
783 | ||
784 | start = *gfc_current_locus (); | |
785 | ||
786 | if (check_format () == FAILURE) | |
787 | return MATCH_ERROR; | |
788 | ||
789 | if (gfc_match_eos () != MATCH_YES) | |
790 | { | |
791 | gfc_syntax_error (ST_FORMAT); | |
792 | return MATCH_ERROR; | |
793 | } | |
794 | ||
795 | /* The label doesn't get created until after the statement is done | |
796 | being matched, so we have to leave the string for later. */ | |
797 | ||
798 | gfc_set_locus (&start); /* Back to the beginning */ | |
799 | ||
800 | new_st.loc = start; | |
801 | new_st.op = EXEC_NOP; | |
802 | ||
803 | e = gfc_get_expr(); | |
804 | e->expr_type = EXPR_CONSTANT; | |
805 | e->ts.type = BT_CHARACTER; | |
806 | e->ts.kind = gfc_default_character_kind(); | |
807 | e->where = start; | |
808 | e->value.character.string = format_string = gfc_getmem(format_length+1); | |
809 | e->value.character.length = format_length; | |
810 | gfc_statement_label->format = e; | |
811 | ||
812 | mode = MODE_COPY; | |
813 | check_format (); /* Guaranteed to succeed */ | |
814 | gfc_match_eos (); /* Guaranteed to succeed */ | |
815 | ||
816 | return MATCH_YES; | |
817 | } | |
818 | ||
819 | ||
820 | /* Match an expression I/O tag of some sort. */ | |
821 | ||
822 | static match | |
823 | match_etag (const io_tag * tag, gfc_expr ** v) | |
824 | { | |
825 | gfc_expr *result; | |
826 | match m; | |
827 | ||
828 | m = gfc_match (tag->spec, &result); | |
829 | if (m != MATCH_YES) | |
830 | return m; | |
831 | ||
832 | if (*v != NULL) | |
833 | { | |
834 | gfc_error ("Duplicate %s specification at %C", tag->name); | |
835 | gfc_free_expr (result); | |
836 | return MATCH_ERROR; | |
837 | } | |
838 | ||
839 | *v = result; | |
840 | return MATCH_YES; | |
841 | } | |
842 | ||
843 | ||
844 | /* Match a variable I/O tag of some sort. */ | |
845 | ||
846 | static match | |
847 | match_vtag (const io_tag * tag, gfc_expr ** v) | |
848 | { | |
849 | gfc_expr *result; | |
850 | match m; | |
851 | ||
852 | m = gfc_match (tag->spec, &result); | |
853 | if (m != MATCH_YES) | |
854 | return m; | |
855 | ||
856 | if (*v != NULL) | |
857 | { | |
858 | gfc_error ("Duplicate %s specification at %C", tag->name); | |
859 | gfc_free_expr (result); | |
860 | return MATCH_ERROR; | |
861 | } | |
862 | ||
863 | if (result->symtree->n.sym->attr.intent == INTENT_IN) | |
864 | { | |
865 | gfc_error ("Variable tag cannot be INTENT(IN) at %C"); | |
866 | gfc_free_expr (result); | |
867 | return MATCH_ERROR; | |
868 | } | |
869 | ||
870 | if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym)) | |
871 | { | |
872 | gfc_error ("Variable tag cannot be assigned in PURE procedure at %C"); | |
873 | gfc_free_expr (result); | |
874 | return MATCH_ERROR; | |
875 | } | |
876 | ||
877 | *v = result; | |
878 | return MATCH_YES; | |
879 | } | |
880 | ||
881 | ||
882 | /* Match a label I/O tag. */ | |
883 | ||
884 | static match | |
885 | match_ltag (const io_tag * tag, gfc_st_label ** label) | |
886 | { | |
887 | match m; | |
888 | gfc_st_label *old; | |
889 | ||
890 | old = *label; | |
891 | m = gfc_match (tag->spec, label); | |
892 | if (m == MATCH_YES && old != 0) | |
893 | { | |
894 | gfc_error ("Duplicate %s label specification at %C", tag->name); | |
895 | return MATCH_ERROR; | |
896 | } | |
897 | ||
898 | return m; | |
899 | } | |
900 | ||
901 | ||
902 | /* Do expression resolution and type-checking on an expression tag. */ | |
903 | ||
904 | static try | |
905 | resolve_tag (const io_tag * tag, gfc_expr * e) | |
906 | { | |
907 | ||
908 | if (e == NULL) | |
909 | return SUCCESS; | |
910 | ||
911 | if (gfc_resolve_expr (e) == FAILURE) | |
912 | return FAILURE; | |
913 | ||
914 | if (e->ts.type != tag->type) | |
915 | { | |
916 | /* Format label can be integer varibale. */ | |
917 | if (tag != &tag_format) | |
918 | { | |
919 | gfc_error ("%s tag at %L must be of type %s", tag->name, &e->where, | |
920 | gfc_basic_typename (tag->type)); | |
921 | return FAILURE; | |
922 | } | |
923 | } | |
924 | ||
925 | if (tag == &tag_format) | |
926 | { | |
927 | if (e->rank != 1 && e->rank != 0) | |
928 | { | |
929 | gfc_error ("FORMAT tag at %L cannot be array of strings", | |
930 | &e->where); | |
931 | return FAILURE; | |
932 | } | |
933 | } | |
934 | else | |
935 | { | |
936 | if (e->rank != 0) | |
937 | { | |
938 | gfc_error ("%s tag at %L must be scalar", tag->name, &e->where); | |
939 | return FAILURE; | |
940 | } | |
941 | } | |
942 | ||
943 | return SUCCESS; | |
944 | } | |
945 | ||
946 | ||
947 | /* Match a single tag of an OPEN statement. */ | |
948 | ||
949 | static match | |
950 | match_open_element (gfc_open * open) | |
951 | { | |
952 | match m; | |
953 | ||
954 | m = match_etag (&tag_unit, &open->unit); | |
955 | if (m != MATCH_NO) | |
956 | return m; | |
957 | m = match_vtag (&tag_iostat, &open->iostat); | |
958 | if (m != MATCH_NO) | |
959 | return m; | |
960 | m = match_etag (&tag_file, &open->file); | |
961 | if (m != MATCH_NO) | |
962 | return m; | |
963 | m = match_etag (&tag_status, &open->status); | |
964 | if (m != MATCH_NO) | |
965 | return m; | |
966 | m = match_etag (&tag_e_access, &open->access); | |
967 | if (m != MATCH_NO) | |
968 | return m; | |
969 | m = match_etag (&tag_e_form, &open->form); | |
970 | if (m != MATCH_NO) | |
971 | return m; | |
972 | m = match_etag (&tag_e_recl, &open->recl); | |
973 | if (m != MATCH_NO) | |
974 | return m; | |
975 | m = match_etag (&tag_e_blank, &open->blank); | |
976 | if (m != MATCH_NO) | |
977 | return m; | |
978 | m = match_etag (&tag_e_position, &open->position); | |
979 | if (m != MATCH_NO) | |
980 | return m; | |
981 | m = match_etag (&tag_e_action, &open->action); | |
982 | if (m != MATCH_NO) | |
983 | return m; | |
984 | m = match_etag (&tag_e_delim, &open->delim); | |
985 | if (m != MATCH_NO) | |
986 | return m; | |
987 | m = match_etag (&tag_e_pad, &open->pad); | |
988 | if (m != MATCH_NO) | |
989 | return m; | |
990 | m = match_ltag (&tag_err, &open->err); | |
991 | if (m != MATCH_NO) | |
992 | return m; | |
993 | ||
994 | return MATCH_NO; | |
995 | } | |
996 | ||
997 | ||
998 | /* Free the gfc_open structure and all the expressions it contains. */ | |
999 | ||
1000 | void | |
1001 | gfc_free_open (gfc_open * open) | |
1002 | { | |
1003 | ||
1004 | if (open == NULL) | |
1005 | return; | |
1006 | ||
1007 | gfc_free_expr (open->unit); | |
1008 | gfc_free_expr (open->iostat); | |
1009 | gfc_free_expr (open->file); | |
1010 | gfc_free_expr (open->status); | |
1011 | gfc_free_expr (open->access); | |
1012 | gfc_free_expr (open->form); | |
1013 | gfc_free_expr (open->recl); | |
1014 | gfc_free_expr (open->blank); | |
1015 | gfc_free_expr (open->position); | |
1016 | gfc_free_expr (open->action); | |
1017 | gfc_free_expr (open->delim); | |
1018 | gfc_free_expr (open->pad); | |
1019 | ||
1020 | gfc_free (open); | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /* Resolve everything in a gfc_open structure. */ | |
1025 | ||
1026 | try | |
1027 | gfc_resolve_open (gfc_open * open) | |
1028 | { | |
1029 | ||
1030 | RESOLVE_TAG (&tag_unit, open->unit); | |
1031 | RESOLVE_TAG (&tag_iostat, open->iostat); | |
1032 | RESOLVE_TAG (&tag_file, open->file); | |
1033 | RESOLVE_TAG (&tag_status, open->status); | |
1034 | RESOLVE_TAG (&tag_e_form, open->form); | |
1035 | RESOLVE_TAG (&tag_e_recl, open->recl); | |
1036 | ||
1037 | RESOLVE_TAG (&tag_e_blank, open->blank); | |
1038 | RESOLVE_TAG (&tag_e_position, open->position); | |
1039 | RESOLVE_TAG (&tag_e_action, open->action); | |
1040 | RESOLVE_TAG (&tag_e_delim, open->delim); | |
1041 | RESOLVE_TAG (&tag_e_pad, open->pad); | |
1042 | ||
1043 | if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE) | |
1044 | return FAILURE; | |
1045 | ||
1046 | return SUCCESS; | |
1047 | } | |
1048 | ||
1049 | ||
1050 | /* Match an OPEN statmement. */ | |
1051 | ||
1052 | match | |
1053 | gfc_match_open (void) | |
1054 | { | |
1055 | gfc_open *open; | |
1056 | match m; | |
1057 | ||
1058 | m = gfc_match_char ('('); | |
1059 | if (m == MATCH_NO) | |
1060 | return m; | |
1061 | ||
1062 | open = gfc_getmem (sizeof (gfc_open)); | |
1063 | ||
1064 | m = match_open_element (open); | |
1065 | ||
1066 | if (m == MATCH_ERROR) | |
1067 | goto cleanup; | |
1068 | if (m == MATCH_NO) | |
1069 | { | |
1070 | m = gfc_match_expr (&open->unit); | |
1071 | if (m == MATCH_NO) | |
1072 | goto syntax; | |
1073 | if (m == MATCH_ERROR) | |
1074 | goto cleanup; | |
1075 | } | |
1076 | ||
1077 | for (;;) | |
1078 | { | |
1079 | if (gfc_match_char (')') == MATCH_YES) | |
1080 | break; | |
1081 | if (gfc_match_char (',') != MATCH_YES) | |
1082 | goto syntax; | |
1083 | ||
1084 | m = match_open_element (open); | |
1085 | if (m == MATCH_ERROR) | |
1086 | goto cleanup; | |
1087 | if (m == MATCH_NO) | |
1088 | goto syntax; | |
1089 | } | |
1090 | ||
1091 | if (gfc_match_eos () == MATCH_NO) | |
1092 | goto syntax; | |
1093 | ||
1094 | if (gfc_pure (NULL)) | |
1095 | { | |
1096 | gfc_error ("OPEN statement not allowed in PURE procedure at %C"); | |
1097 | goto cleanup; | |
1098 | } | |
1099 | ||
1100 | new_st.op = EXEC_OPEN; | |
1101 | new_st.ext.open = open; | |
1102 | return MATCH_YES; | |
1103 | ||
1104 | syntax: | |
1105 | gfc_syntax_error (ST_OPEN); | |
1106 | ||
1107 | cleanup: | |
1108 | gfc_free_open (open); | |
1109 | return MATCH_ERROR; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /* Free a gfc_close structure an all its expressions. */ | |
1114 | ||
1115 | void | |
1116 | gfc_free_close (gfc_close * close) | |
1117 | { | |
1118 | ||
1119 | if (close == NULL) | |
1120 | return; | |
1121 | ||
1122 | gfc_free_expr (close->unit); | |
1123 | gfc_free_expr (close->iostat); | |
1124 | gfc_free_expr (close->status); | |
1125 | ||
1126 | gfc_free (close); | |
1127 | } | |
1128 | ||
1129 | ||
1130 | /* Match elements of a CLOSE statment. */ | |
1131 | ||
1132 | static match | |
1133 | match_close_element (gfc_close * close) | |
1134 | { | |
1135 | match m; | |
1136 | ||
1137 | m = match_etag (&tag_unit, &close->unit); | |
1138 | if (m != MATCH_NO) | |
1139 | return m; | |
1140 | m = match_etag (&tag_status, &close->status); | |
1141 | if (m != MATCH_NO) | |
1142 | return m; | |
1143 | m = match_vtag (&tag_iostat, &close->iostat); | |
1144 | if (m != MATCH_NO) | |
1145 | return m; | |
1146 | m = match_ltag (&tag_err, &close->err); | |
1147 | if (m != MATCH_NO) | |
1148 | return m; | |
1149 | ||
1150 | return MATCH_NO; | |
1151 | } | |
1152 | ||
1153 | ||
1154 | /* Match a CLOSE statement. */ | |
1155 | ||
1156 | match | |
1157 | gfc_match_close (void) | |
1158 | { | |
1159 | gfc_close *close; | |
1160 | match m; | |
1161 | ||
1162 | m = gfc_match_char ('('); | |
1163 | if (m == MATCH_NO) | |
1164 | return m; | |
1165 | ||
1166 | close = gfc_getmem (sizeof (gfc_close)); | |
1167 | ||
1168 | m = match_close_element (close); | |
1169 | ||
1170 | if (m == MATCH_ERROR) | |
1171 | goto cleanup; | |
1172 | if (m == MATCH_NO) | |
1173 | { | |
1174 | m = gfc_match_expr (&close->unit); | |
1175 | if (m == MATCH_NO) | |
1176 | goto syntax; | |
1177 | if (m == MATCH_ERROR) | |
1178 | goto cleanup; | |
1179 | } | |
1180 | ||
1181 | for (;;) | |
1182 | { | |
1183 | if (gfc_match_char (')') == MATCH_YES) | |
1184 | break; | |
1185 | if (gfc_match_char (',') != MATCH_YES) | |
1186 | goto syntax; | |
1187 | ||
1188 | m = match_close_element (close); | |
1189 | if (m == MATCH_ERROR) | |
1190 | goto cleanup; | |
1191 | if (m == MATCH_NO) | |
1192 | goto syntax; | |
1193 | } | |
1194 | ||
1195 | if (gfc_match_eos () == MATCH_NO) | |
1196 | goto syntax; | |
1197 | ||
1198 | if (gfc_pure (NULL)) | |
1199 | { | |
1200 | gfc_error ("CLOSE statement not allowed in PURE procedure at %C"); | |
1201 | goto cleanup; | |
1202 | } | |
1203 | ||
1204 | new_st.op = EXEC_CLOSE; | |
1205 | new_st.ext.close = close; | |
1206 | return MATCH_YES; | |
1207 | ||
1208 | syntax: | |
1209 | gfc_syntax_error (ST_CLOSE); | |
1210 | ||
1211 | cleanup: | |
1212 | gfc_free_close (close); | |
1213 | return MATCH_ERROR; | |
1214 | } | |
1215 | ||
1216 | ||
1217 | /* Resolve everything in a gfc_close structure. */ | |
1218 | ||
1219 | try | |
1220 | gfc_resolve_close (gfc_close * close) | |
1221 | { | |
1222 | ||
1223 | RESOLVE_TAG (&tag_unit, close->unit); | |
1224 | RESOLVE_TAG (&tag_iostat, close->iostat); | |
1225 | RESOLVE_TAG (&tag_status, close->status); | |
1226 | ||
1227 | if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE) | |
1228 | return FAILURE; | |
1229 | ||
1230 | return SUCCESS; | |
1231 | } | |
1232 | ||
1233 | ||
1234 | /* Free a gfc_filepos structure. */ | |
1235 | ||
1236 | void | |
1237 | gfc_free_filepos (gfc_filepos * fp) | |
1238 | { | |
1239 | ||
1240 | gfc_free_expr (fp->unit); | |
1241 | gfc_free_expr (fp->iostat); | |
1242 | gfc_free (fp); | |
1243 | } | |
1244 | ||
1245 | ||
1246 | /* Match elements of a REWIND, BACKSPACE or ENDFILE statement. */ | |
1247 | ||
1248 | static match | |
1249 | match_file_element (gfc_filepos * fp) | |
1250 | { | |
1251 | match m; | |
1252 | ||
1253 | m = match_etag (&tag_unit, &fp->unit); | |
1254 | if (m != MATCH_NO) | |
1255 | return m; | |
1256 | m = match_vtag (&tag_iostat, &fp->iostat); | |
1257 | if (m != MATCH_NO) | |
1258 | return m; | |
1259 | m = match_ltag (&tag_err, &fp->err); | |
1260 | if (m != MATCH_NO) | |
1261 | return m; | |
1262 | ||
1263 | return MATCH_NO; | |
1264 | } | |
1265 | ||
1266 | ||
1267 | /* Match the second half of the file-positioning statements, REWIND, | |
1268 | BACKSPACE or ENDFILE. */ | |
1269 | ||
1270 | static match | |
1271 | match_filepos (gfc_statement st, gfc_exec_op op) | |
1272 | { | |
1273 | gfc_filepos *fp; | |
1274 | match m; | |
1275 | ||
1276 | fp = gfc_getmem (sizeof (gfc_filepos)); | |
1277 | ||
1278 | if (gfc_match_char ('(') == MATCH_NO) | |
1279 | { | |
1280 | m = gfc_match_expr (&fp->unit); | |
1281 | if (m == MATCH_ERROR) | |
1282 | goto cleanup; | |
1283 | if (m == MATCH_NO) | |
1284 | goto syntax; | |
1285 | ||
1286 | goto done; | |
1287 | } | |
1288 | ||
1289 | m = match_file_element (fp); | |
1290 | if (m == MATCH_ERROR) | |
1291 | goto done; | |
1292 | if (m == MATCH_NO) | |
1293 | { | |
1294 | m = gfc_match_expr (&fp->unit); | |
1295 | if (m == MATCH_ERROR) | |
1296 | goto done; | |
1297 | if (m == MATCH_NO) | |
1298 | goto syntax; | |
1299 | } | |
1300 | ||
1301 | for (;;) | |
1302 | { | |
1303 | if (gfc_match_char (')') == MATCH_YES) | |
1304 | break; | |
1305 | if (gfc_match_char (',') != MATCH_YES) | |
1306 | goto syntax; | |
1307 | ||
1308 | m = match_file_element (fp); | |
1309 | if (m == MATCH_ERROR) | |
1310 | goto cleanup; | |
1311 | if (m == MATCH_NO) | |
1312 | goto syntax; | |
1313 | } | |
1314 | ||
1315 | done: | |
1316 | if (gfc_match_eos () != MATCH_YES) | |
1317 | goto syntax; | |
1318 | ||
1319 | if (gfc_pure (NULL)) | |
1320 | { | |
1321 | gfc_error ("%s statement not allowed in PURE procedure at %C", | |
1322 | gfc_ascii_statement (st)); | |
1323 | ||
1324 | goto cleanup; | |
1325 | } | |
1326 | ||
1327 | new_st.op = op; | |
1328 | new_st.ext.filepos = fp; | |
1329 | return MATCH_YES; | |
1330 | ||
1331 | syntax: | |
1332 | gfc_syntax_error (st); | |
1333 | ||
1334 | cleanup: | |
1335 | gfc_free_filepos (fp); | |
1336 | return MATCH_ERROR; | |
1337 | } | |
1338 | ||
1339 | ||
1340 | try | |
1341 | gfc_resolve_filepos (gfc_filepos * fp) | |
1342 | { | |
1343 | ||
1344 | RESOLVE_TAG (&tag_unit, fp->unit); | |
1345 | if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE) | |
1346 | return FAILURE; | |
1347 | ||
1348 | return SUCCESS; | |
1349 | } | |
1350 | ||
1351 | ||
1352 | /* Match the file positioning statements: ENDFILE, BACKSPACE or | |
1353 | REWIND. */ | |
1354 | ||
1355 | match | |
1356 | gfc_match_endfile (void) | |
1357 | { | |
1358 | ||
1359 | return match_filepos (ST_END_FILE, EXEC_ENDFILE); | |
1360 | } | |
1361 | ||
1362 | match | |
1363 | gfc_match_backspace (void) | |
1364 | { | |
1365 | ||
1366 | return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE); | |
1367 | } | |
1368 | ||
1369 | match | |
1370 | gfc_match_rewind (void) | |
1371 | { | |
1372 | ||
1373 | return match_filepos (ST_REWIND, EXEC_REWIND); | |
1374 | } | |
1375 | ||
1376 | ||
1377 | /******************** Data Transfer Statments *********************/ | |
1378 | ||
1379 | typedef enum | |
1380 | { M_READ, M_WRITE, M_PRINT, M_INQUIRE } | |
1381 | io_kind; | |
1382 | ||
1383 | ||
1384 | /* Return a default unit number. */ | |
1385 | ||
1386 | static gfc_expr * | |
1387 | default_unit (io_kind k) | |
1388 | { | |
1389 | int unit; | |
1390 | ||
1391 | if (k == M_READ) | |
1392 | unit = 5; | |
1393 | else | |
1394 | unit = 6; | |
1395 | ||
1396 | return gfc_int_expr (unit); | |
1397 | } | |
1398 | ||
1399 | ||
1400 | /* Match a unit specification for a data transfer statement. */ | |
1401 | ||
1402 | static match | |
1403 | match_dt_unit (io_kind k, gfc_dt * dt) | |
1404 | { | |
1405 | gfc_expr *e; | |
1406 | ||
1407 | if (gfc_match_char ('*') == MATCH_YES) | |
1408 | { | |
1409 | if (dt->io_unit != NULL) | |
1410 | goto conflict; | |
1411 | ||
1412 | dt->io_unit = default_unit (k); | |
1413 | return MATCH_YES; | |
1414 | } | |
1415 | ||
1416 | if (gfc_match_expr (&e) == MATCH_YES) | |
1417 | { | |
1418 | if (dt->io_unit != NULL) | |
1419 | { | |
1420 | gfc_free_expr (e); | |
1421 | goto conflict; | |
1422 | } | |
1423 | ||
1424 | dt->io_unit = e; | |
1425 | return MATCH_YES; | |
1426 | } | |
1427 | ||
1428 | return MATCH_NO; | |
1429 | ||
1430 | conflict: | |
1431 | gfc_error ("Duplicate UNIT specification at %C"); | |
1432 | return MATCH_ERROR; | |
1433 | } | |
1434 | ||
1435 | ||
1436 | /* Match a format specification. */ | |
1437 | ||
1438 | static match | |
1439 | match_dt_format (gfc_dt * dt) | |
1440 | { | |
1441 | locus where; | |
1442 | gfc_expr *e; | |
1443 | gfc_st_label *label; | |
1444 | ||
1445 | where = *gfc_current_locus (); | |
1446 | ||
1447 | if (gfc_match_char ('*') == MATCH_YES) | |
1448 | { | |
1449 | if (dt->format_expr != NULL || dt->format_label != NULL) | |
1450 | goto conflict; | |
1451 | ||
1452 | dt->format_label = &format_asterisk; | |
1453 | return MATCH_YES; | |
1454 | } | |
1455 | ||
1456 | if (gfc_match_st_label (&label, 0) == MATCH_YES) | |
1457 | { | |
1458 | if (dt->format_expr != NULL || dt->format_label != NULL) | |
1459 | { | |
1460 | gfc_free_st_label (label); | |
1461 | goto conflict; | |
1462 | } | |
1463 | ||
1464 | if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE) | |
1465 | return MATCH_ERROR; | |
1466 | ||
1467 | dt->format_label = label; | |
1468 | return MATCH_YES; | |
1469 | } | |
1470 | ||
1471 | if (gfc_match_expr (&e) == MATCH_YES) | |
1472 | { | |
1473 | if (dt->format_expr != NULL || dt->format_label != NULL) | |
1474 | { | |
1475 | gfc_free_expr (e); | |
1476 | goto conflict; | |
1477 | } | |
1478 | if (e->ts.type == BT_INTEGER && e->rank == 0) | |
1479 | e->symtree->n.sym->attr.assign = 1; | |
1480 | ||
1481 | dt->format_expr = e; | |
1482 | return MATCH_YES; | |
1483 | } | |
1484 | ||
1485 | gfc_set_locus (&where); /* The only case where we have to restore */ | |
1486 | ||
1487 | return MATCH_NO; | |
1488 | ||
1489 | conflict: | |
1490 | gfc_error ("Duplicate format specification at %C"); | |
1491 | return MATCH_ERROR; | |
1492 | } | |
1493 | ||
1494 | ||
1495 | /* Traverse a namelist that is part of a READ statement to make sure | |
1496 | that none of the variables in the namelist are INTENT(IN). Returns | |
1497 | nonzero if we find such a variable. */ | |
1498 | ||
1499 | static int | |
1500 | check_namelist (gfc_symbol * sym) | |
1501 | { | |
1502 | gfc_namelist *p; | |
1503 | ||
1504 | for (p = sym->namelist; p; p = p->next) | |
1505 | if (p->sym->attr.intent == INTENT_IN) | |
1506 | { | |
1507 | gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C", | |
1508 | p->sym->name, sym->name); | |
1509 | return 1; | |
1510 | } | |
1511 | ||
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | ||
1516 | /* Match a single data transfer element. */ | |
1517 | ||
1518 | static match | |
1519 | match_dt_element (io_kind k, gfc_dt * dt) | |
1520 | { | |
1521 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1522 | gfc_symbol *sym; | |
1523 | match m; | |
1524 | ||
1525 | if (gfc_match (" unit =") == MATCH_YES) | |
1526 | { | |
1527 | m = match_dt_unit (k, dt); | |
1528 | if (m != MATCH_NO) | |
1529 | return m; | |
1530 | } | |
1531 | ||
1532 | if (gfc_match (" fmt =") == MATCH_YES) | |
1533 | { | |
1534 | m = match_dt_format (dt); | |
1535 | if (m != MATCH_NO) | |
1536 | return m; | |
1537 | } | |
1538 | ||
1539 | if (gfc_match (" nml = %n", name) == MATCH_YES) | |
1540 | { | |
1541 | if (dt->namelist != NULL) | |
1542 | { | |
1543 | gfc_error ("Duplicate NML specification at %C"); | |
1544 | return MATCH_ERROR; | |
1545 | } | |
1546 | ||
1547 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
1548 | return MATCH_ERROR; | |
1549 | ||
1550 | if (sym == NULL || sym->attr.flavor != FL_NAMELIST) | |
1551 | { | |
1552 | gfc_error ("Symbol '%s' at %C must be a NAMELIST group name", | |
1553 | sym != NULL ? sym->name : name); | |
1554 | return MATCH_ERROR; | |
1555 | } | |
1556 | ||
1557 | dt->namelist = sym; | |
1558 | if (k == M_READ && check_namelist (sym)) | |
1559 | return MATCH_ERROR; | |
1560 | ||
1561 | return MATCH_YES; | |
1562 | } | |
1563 | ||
1564 | m = match_etag (&tag_rec, &dt->rec); | |
1565 | if (m != MATCH_NO) | |
1566 | return m; | |
1567 | m = match_vtag (&tag_iostat, &dt->iostat); | |
1568 | if (m != MATCH_NO) | |
1569 | return m; | |
1570 | m = match_ltag (&tag_err, &dt->err); | |
1571 | if (m != MATCH_NO) | |
1572 | return m; | |
1573 | m = match_etag (&tag_advance, &dt->advance); | |
1574 | if (m != MATCH_NO) | |
1575 | return m; | |
1576 | m = match_vtag (&tag_size, &dt->size); | |
1577 | if (m != MATCH_NO) | |
1578 | return m; | |
1579 | ||
1580 | m = match_ltag (&tag_end, &dt->end); | |
1581 | if (m == MATCH_YES) | |
1582 | dt->end_where = *gfc_current_locus (); | |
1583 | if (m != MATCH_NO) | |
1584 | return m; | |
1585 | ||
1586 | m = match_ltag (&tag_eor, &dt->eor); | |
1587 | if (m == MATCH_YES) | |
1588 | dt->eor_where = *gfc_current_locus (); | |
1589 | if (m != MATCH_NO) | |
1590 | return m; | |
1591 | ||
1592 | return MATCH_NO; | |
1593 | } | |
1594 | ||
1595 | ||
1596 | /* Free a data transfer structure and everything below it. */ | |
1597 | ||
1598 | void | |
1599 | gfc_free_dt (gfc_dt * dt) | |
1600 | { | |
1601 | ||
1602 | if (dt == NULL) | |
1603 | return; | |
1604 | ||
1605 | gfc_free_expr (dt->io_unit); | |
1606 | gfc_free_expr (dt->format_expr); | |
1607 | gfc_free_expr (dt->rec); | |
1608 | gfc_free_expr (dt->advance); | |
1609 | gfc_free_expr (dt->iostat); | |
1610 | gfc_free_expr (dt->size); | |
1611 | ||
1612 | gfc_free (dt); | |
1613 | } | |
1614 | ||
1615 | ||
1616 | /* Resolve everything in a gfc_dt structure. */ | |
1617 | ||
1618 | try | |
1619 | gfc_resolve_dt (gfc_dt * dt) | |
1620 | { | |
1621 | gfc_expr *e; | |
1622 | ||
1623 | RESOLVE_TAG (&tag_format, dt->format_expr); | |
1624 | RESOLVE_TAG (&tag_rec, dt->rec); | |
1625 | RESOLVE_TAG (&tag_advance, dt->advance); | |
1626 | RESOLVE_TAG (&tag_iostat, dt->iostat); | |
1627 | RESOLVE_TAG (&tag_size, dt->size); | |
1628 | ||
1629 | e = dt->io_unit; | |
1630 | if (gfc_resolve_expr (e) == SUCCESS | |
1631 | && (e->ts.type != BT_INTEGER | |
1632 | && (e->ts.type != BT_CHARACTER | |
1633 | || e->expr_type != EXPR_VARIABLE))) | |
1634 | { | |
1635 | gfc_error | |
1636 | ("UNIT specification at %L must be an INTEGER expression or a " | |
1637 | "CHARACTER variable", &e->where); | |
1638 | return FAILURE; | |
1639 | } | |
1640 | ||
1641 | /* Sanity checks on data transfer statements. */ | |
1642 | if (e->ts.type == BT_CHARACTER) | |
1643 | { | |
1644 | if (dt->rec != NULL) | |
1645 | { | |
1646 | gfc_error ("REC tag at %L is incompatible with internal file", | |
1647 | &dt->rec->where); | |
1648 | return FAILURE; | |
1649 | } | |
1650 | ||
1651 | if (dt->namelist != NULL) | |
1652 | { | |
1653 | gfc_error ("Internal file at %L is incompatible with namelist", | |
1654 | &dt->io_unit->where); | |
1655 | return FAILURE; | |
1656 | } | |
1657 | ||
1658 | if (dt->advance != NULL) | |
1659 | { | |
1660 | gfc_error ("ADVANCE tag at %L is incompatible with internal file", | |
1661 | &dt->advance->where); | |
1662 | return FAILURE; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | if (dt->rec != NULL) | |
1667 | { | |
1668 | if (dt->end != NULL) | |
1669 | { | |
1670 | gfc_error ("REC tag at %L is incompatible with END tag", | |
1671 | &dt->rec->where); | |
1672 | return FAILURE; | |
1673 | } | |
1674 | ||
1675 | if (dt->format_label == &format_asterisk) | |
1676 | { | |
1677 | gfc_error | |
1678 | ("END tag at %L is incompatible with list directed format (*)", | |
1679 | &dt->end_where); | |
1680 | return FAILURE; | |
1681 | } | |
1682 | ||
1683 | if (dt->namelist != NULL) | |
1684 | { | |
1685 | gfc_error ("REC tag at %L is incompatible with namelist", | |
1686 | &dt->rec->where); | |
1687 | return FAILURE; | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | if (dt->advance != NULL && dt->format_label == &format_asterisk) | |
1692 | { | |
1693 | gfc_error ("ADVANCE tag at %L is incompatible with list directed " | |
1694 | "format (*)", &dt->advance->where); | |
1695 | return FAILURE; | |
1696 | } | |
1697 | ||
1698 | if (dt->eor != 0 && dt->advance == NULL) | |
1699 | { | |
1700 | gfc_error ("EOR tag at %L requires an ADVANCE tag", &dt->eor_where); | |
1701 | return FAILURE; | |
1702 | } | |
1703 | ||
1704 | if (dt->size != NULL && dt->advance == NULL) | |
1705 | { | |
1706 | gfc_error ("SIZE tag at %L requires an ADVANCE tag", &dt->size->where); | |
1707 | return FAILURE; | |
1708 | } | |
1709 | ||
1710 | /* TODO: Make sure the ADVANCE tag is 'yes' or 'no' if it is a string | |
1711 | constant. */ | |
1712 | ||
1713 | if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE) | |
1714 | return FAILURE; | |
1715 | ||
1716 | if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE) | |
1717 | return FAILURE; | |
1718 | ||
1719 | if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE) | |
1720 | return FAILURE; | |
1721 | ||
1722 | /* Check the format label ectually exists. */ | |
1723 | if (dt->format_label && dt->format_label != &format_asterisk | |
1724 | && dt->format_label->defined == ST_LABEL_UNKNOWN) | |
1725 | { | |
1726 | gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value, | |
1727 | &dt->format_label->where); | |
1728 | return FAILURE; | |
1729 | } | |
1730 | return SUCCESS; | |
1731 | } | |
1732 | ||
1733 | ||
1734 | /* Given an io_kind, return its name. */ | |
1735 | ||
1736 | static const char * | |
1737 | io_kind_name (io_kind k) | |
1738 | { | |
1739 | const char *name; | |
1740 | ||
1741 | switch (k) | |
1742 | { | |
1743 | case M_READ: | |
1744 | name = "READ"; | |
1745 | break; | |
1746 | case M_WRITE: | |
1747 | name = "WRITE"; | |
1748 | break; | |
1749 | case M_PRINT: | |
1750 | name = "PRINT"; | |
1751 | break; | |
1752 | case M_INQUIRE: | |
1753 | name = "INQUIRE"; | |
1754 | break; | |
1755 | default: | |
1756 | gfc_internal_error ("io_kind_name(): bad I/O-kind"); | |
1757 | } | |
1758 | ||
1759 | return name; | |
1760 | } | |
1761 | ||
1762 | ||
1763 | /* Match an IO iteration statement of the form: | |
1764 | ||
1765 | ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] ) | |
1766 | ||
1767 | which is equivalent to a single IO element. This function is | |
1768 | mutually recursive with match_io_element(). */ | |
1769 | ||
1770 | static match match_io_element (io_kind k, gfc_code **); | |
1771 | ||
1772 | static match | |
1773 | match_io_iterator (io_kind k, gfc_code ** result) | |
1774 | { | |
1775 | gfc_code *head, *tail, *new; | |
1776 | gfc_iterator *iter; | |
1777 | locus old_loc; | |
1778 | match m; | |
1779 | int n; | |
1780 | ||
1781 | iter = NULL; | |
1782 | head = NULL; | |
1783 | old_loc = *gfc_current_locus (); | |
1784 | ||
1785 | if (gfc_match_char ('(') != MATCH_YES) | |
1786 | return MATCH_NO; | |
1787 | ||
1788 | m = match_io_element (k, &head); | |
1789 | tail = head; | |
1790 | ||
1791 | if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES) | |
1792 | { | |
1793 | m = MATCH_NO; | |
1794 | goto cleanup; | |
1795 | } | |
1796 | ||
1797 | /* Can't be anything but an IO iterator. Build a list. */ | |
1798 | iter = gfc_get_iterator (); | |
1799 | ||
1800 | for (n = 1;; n++) | |
1801 | { | |
1802 | m = gfc_match_iterator (iter, 0); | |
1803 | if (m == MATCH_ERROR) | |
1804 | goto cleanup; | |
1805 | if (m == MATCH_YES) | |
1806 | break; | |
1807 | ||
1808 | m = match_io_element (k, &new); | |
1809 | if (m == MATCH_ERROR) | |
1810 | goto cleanup; | |
1811 | if (m == MATCH_NO) | |
1812 | { | |
1813 | if (n > 2) | |
1814 | goto syntax; | |
1815 | goto cleanup; | |
1816 | } | |
1817 | ||
1818 | tail = gfc_append_code (tail, new); | |
1819 | ||
1820 | if (gfc_match_char (',') != MATCH_YES) | |
1821 | { | |
1822 | if (n > 2) | |
1823 | goto syntax; | |
1824 | m = MATCH_NO; | |
1825 | goto cleanup; | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | if (gfc_match_char (')') != MATCH_YES) | |
1830 | goto syntax; | |
1831 | ||
1832 | new = gfc_get_code (); | |
1833 | new->op = EXEC_DO; | |
1834 | new->ext.iterator = iter; | |
1835 | ||
1836 | new->block = gfc_get_code (); | |
1837 | new->block->op = EXEC_DO; | |
1838 | new->block->next = head; | |
1839 | ||
1840 | *result = new; | |
1841 | return MATCH_YES; | |
1842 | ||
1843 | syntax: | |
1844 | gfc_error ("Syntax error in I/O iterator at %C"); | |
1845 | m = MATCH_ERROR; | |
1846 | ||
1847 | cleanup: | |
1848 | gfc_free_iterator (iter, 1); | |
1849 | gfc_free_statements (head); | |
1850 | gfc_set_locus (&old_loc); | |
1851 | return m; | |
1852 | } | |
1853 | ||
1854 | ||
1855 | /* Match a single element of an IO list, which is either a single | |
1856 | expression or an IO Iterator. */ | |
1857 | ||
1858 | static match | |
1859 | match_io_element (io_kind k, gfc_code ** cpp) | |
1860 | { | |
1861 | gfc_expr *expr; | |
1862 | gfc_code *cp; | |
1863 | match m; | |
1864 | ||
1865 | expr = NULL; | |
1866 | ||
1867 | m = match_io_iterator (k, cpp); | |
1868 | if (m == MATCH_YES) | |
1869 | return MATCH_YES; | |
1870 | ||
1871 | if (k == M_READ) | |
1872 | { | |
1873 | m = gfc_match_variable (&expr, 0); | |
1874 | if (m == MATCH_NO) | |
1875 | gfc_error ("Expected variable in READ statement at %C"); | |
1876 | } | |
1877 | else | |
1878 | { | |
1879 | m = gfc_match_expr (&expr); | |
1880 | if (m == MATCH_NO) | |
1881 | gfc_error ("Expected expression in %s statement at %C", | |
1882 | io_kind_name (k)); | |
1883 | } | |
1884 | ||
1885 | if (m == MATCH_YES) | |
1886 | switch (k) | |
1887 | { | |
1888 | case M_READ: | |
1889 | if (expr->symtree->n.sym->attr.intent == INTENT_IN) | |
1890 | { | |
1891 | gfc_error | |
1892 | ("Variable '%s' in input list at %C cannot be INTENT(IN)", | |
1893 | expr->symtree->n.sym->name); | |
1894 | m = MATCH_ERROR; | |
1895 | } | |
1896 | ||
1897 | if (gfc_pure (NULL) | |
1898 | && gfc_impure_variable (expr->symtree->n.sym) | |
1899 | && current_dt->io_unit->ts.type == BT_CHARACTER) | |
1900 | { | |
1901 | gfc_error ("Cannot read to variable '%s' in PURE procedure at %C", | |
1902 | expr->symtree->n.sym->name); | |
1903 | m = MATCH_ERROR; | |
1904 | } | |
1905 | ||
1906 | break; | |
1907 | ||
1908 | case M_WRITE: | |
1909 | if (current_dt->io_unit->ts.type == BT_CHARACTER | |
1910 | && gfc_pure (NULL) | |
1911 | && current_dt->io_unit->expr_type == EXPR_VARIABLE | |
1912 | && gfc_impure_variable (current_dt->io_unit->symtree->n.sym)) | |
1913 | { | |
1914 | gfc_error | |
1915 | ("Cannot write to internal file unit '%s' at %C inside a " | |
1916 | "PURE procedure", current_dt->io_unit->symtree->n.sym->name); | |
1917 | m = MATCH_ERROR; | |
1918 | } | |
1919 | ||
1920 | break; | |
1921 | ||
1922 | default: | |
1923 | break; | |
1924 | } | |
1925 | ||
1926 | if (m != MATCH_YES) | |
1927 | { | |
1928 | gfc_free_expr (expr); | |
1929 | return MATCH_ERROR; | |
1930 | } | |
1931 | ||
1932 | cp = gfc_get_code (); | |
1933 | cp->op = EXEC_TRANSFER; | |
1934 | cp->expr = expr; | |
1935 | ||
1936 | *cpp = cp; | |
1937 | return MATCH_YES; | |
1938 | } | |
1939 | ||
1940 | ||
1941 | /* Match an I/O list, building gfc_code structures as we go. */ | |
1942 | ||
1943 | static match | |
1944 | match_io_list (io_kind k, gfc_code ** head_p) | |
1945 | { | |
1946 | gfc_code *head, *tail, *new; | |
1947 | match m; | |
1948 | ||
1949 | *head_p = head = tail = NULL; | |
1950 | if (gfc_match_eos () == MATCH_YES) | |
1951 | return MATCH_YES; | |
1952 | ||
1953 | for (;;) | |
1954 | { | |
1955 | m = match_io_element (k, &new); | |
1956 | if (m == MATCH_ERROR) | |
1957 | goto cleanup; | |
1958 | if (m == MATCH_NO) | |
1959 | goto syntax; | |
1960 | ||
1961 | tail = gfc_append_code (tail, new); | |
1962 | if (head == NULL) | |
1963 | head = new; | |
1964 | ||
1965 | if (gfc_match_eos () == MATCH_YES) | |
1966 | break; | |
1967 | if (gfc_match_char (',') != MATCH_YES) | |
1968 | goto syntax; | |
1969 | } | |
1970 | ||
1971 | *head_p = head; | |
1972 | return MATCH_YES; | |
1973 | ||
1974 | syntax: | |
1975 | gfc_error ("Syntax error in %s statement at %C", io_kind_name (k)); | |
1976 | ||
1977 | cleanup: | |
1978 | gfc_free_statements (head); | |
1979 | return MATCH_ERROR; | |
1980 | } | |
1981 | ||
1982 | ||
1983 | /* Attach the data transfer end node. */ | |
1984 | ||
1985 | static void | |
1986 | terminate_io (gfc_code * io_code) | |
1987 | { | |
1988 | gfc_code *c; | |
1989 | ||
1990 | if (io_code == NULL) | |
1991 | io_code = &new_st; | |
1992 | ||
1993 | c = gfc_get_code (); | |
1994 | c->op = EXEC_DT_END; | |
1995 | ||
1996 | /* Point to structure that is already there */ | |
1997 | c->ext.dt = new_st.ext.dt; | |
1998 | gfc_append_code (io_code, c); | |
1999 | } | |
2000 | ||
2001 | ||
2002 | /* Match a READ, WRITE or PRINT statement. */ | |
2003 | ||
2004 | static match | |
2005 | match_io (io_kind k) | |
2006 | { | |
2007 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2008 | gfc_code *io_code; | |
2009 | gfc_symbol *sym; | |
2010 | gfc_expr *expr; | |
2011 | int comma_flag; | |
2012 | locus where; | |
2013 | gfc_dt *dt; | |
2014 | match m; | |
2015 | ||
2016 | comma_flag = 0; | |
2017 | current_dt = dt = gfc_getmem (sizeof (gfc_dt)); | |
2018 | ||
2019 | if (gfc_match_char ('(') == MATCH_NO) | |
2020 | { | |
2021 | if (k == M_WRITE) | |
2022 | goto syntax; | |
2023 | ||
2024 | m = match_dt_format (dt); | |
2025 | if (m == MATCH_ERROR) | |
2026 | goto cleanup; | |
2027 | if (m == MATCH_NO) | |
2028 | goto syntax; | |
2029 | ||
2030 | comma_flag = 1; | |
2031 | dt->io_unit = default_unit (k); | |
2032 | goto get_io_list; | |
2033 | } | |
2034 | ||
2035 | /* Match a control list */ | |
2036 | if (match_dt_element (k, dt) == MATCH_YES) | |
2037 | goto next; | |
2038 | if (match_dt_unit (k, dt) != MATCH_YES) | |
2039 | goto loop; | |
2040 | ||
2041 | if (gfc_match_char (')') == MATCH_YES) | |
2042 | goto get_io_list; | |
2043 | if (gfc_match_char (',') != MATCH_YES) | |
2044 | goto syntax; | |
2045 | ||
2046 | m = match_dt_element (k, dt); | |
2047 | if (m == MATCH_YES) | |
2048 | goto next; | |
2049 | if (m == MATCH_ERROR) | |
2050 | goto cleanup; | |
2051 | ||
2052 | m = match_dt_format (dt); | |
2053 | if (m == MATCH_YES) | |
2054 | goto next; | |
2055 | if (m == MATCH_ERROR) | |
2056 | goto cleanup; | |
2057 | ||
2058 | where = *gfc_current_locus (); | |
2059 | ||
2060 | if (gfc_match_name (name) == MATCH_YES | |
2061 | && !gfc_find_symbol (name, NULL, 1, &sym) | |
2062 | && sym->attr.flavor == FL_NAMELIST) | |
2063 | { | |
2064 | dt->namelist = sym; | |
2065 | if (k == M_READ && check_namelist (sym)) | |
2066 | { | |
2067 | m = MATCH_ERROR; | |
2068 | goto cleanup; | |
2069 | } | |
2070 | goto next; | |
2071 | } | |
2072 | ||
2073 | gfc_set_locus (&where); | |
2074 | ||
2075 | goto loop; /* No matches, try regular elements */ | |
2076 | ||
2077 | next: | |
2078 | if (gfc_match_char (')') == MATCH_YES) | |
2079 | goto get_io_list; | |
2080 | if (gfc_match_char (',') != MATCH_YES) | |
2081 | goto syntax; | |
2082 | ||
2083 | loop: | |
2084 | for (;;) | |
2085 | { | |
2086 | m = match_dt_element (k, dt); | |
2087 | if (m == MATCH_NO) | |
2088 | goto syntax; | |
2089 | if (m == MATCH_ERROR) | |
2090 | goto cleanup; | |
2091 | ||
2092 | if (gfc_match_char (')') == MATCH_YES) | |
2093 | break; | |
2094 | if (gfc_match_char (',') != MATCH_YES) | |
2095 | goto syntax; | |
2096 | } | |
2097 | ||
2098 | get_io_list: | |
2099 | /* Optional leading comma (non-standard). */ | |
2100 | if (!comma_flag) | |
2101 | gfc_match_char (','); | |
2102 | ||
2103 | io_code = NULL; | |
2104 | if (gfc_match_eos () != MATCH_YES) | |
2105 | { | |
2106 | if (comma_flag && gfc_match_char (',') != MATCH_YES) | |
2107 | { | |
2108 | gfc_error ("Expected comma in I/O list at %C"); | |
2109 | m = MATCH_ERROR; | |
2110 | goto cleanup; | |
2111 | } | |
2112 | ||
2113 | m = match_io_list (k, &io_code); | |
2114 | if (m == MATCH_ERROR) | |
2115 | goto cleanup; | |
2116 | if (m == MATCH_NO) | |
2117 | goto syntax; | |
2118 | } | |
2119 | ||
2120 | /* A full IO statement has been matched. */ | |
2121 | if (dt->io_unit->expr_type == EXPR_VARIABLE | |
2122 | && k == M_WRITE | |
2123 | && dt->io_unit->ts.type == BT_CHARACTER | |
2124 | && dt->io_unit->symtree->n.sym->attr.intent == INTENT_IN) | |
2125 | { | |
2126 | gfc_error ("Internal file '%s' at %L is INTENT(IN)", | |
2127 | dt->io_unit->symtree->n.sym->name, &dt->io_unit->where); | |
2128 | m = MATCH_ERROR; | |
2129 | goto cleanup; | |
2130 | } | |
2131 | ||
2132 | expr = dt->format_expr; | |
2133 | ||
2134 | if (expr != NULL && expr->expr_type == EXPR_CONSTANT) | |
2135 | check_format_string (expr); | |
2136 | ||
2137 | if (gfc_pure (NULL) | |
2138 | && (k == M_READ || k == M_WRITE) | |
2139 | && dt->io_unit->ts.type != BT_CHARACTER) | |
2140 | { | |
2141 | gfc_error | |
2142 | ("io-unit in %s statement at %C must be an internal file in a " | |
2143 | "PURE procedure", io_kind_name (k)); | |
2144 | m = MATCH_ERROR; | |
2145 | goto cleanup; | |
2146 | } | |
2147 | ||
2148 | new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE; | |
2149 | new_st.ext.dt = dt; | |
2150 | new_st.next = io_code; | |
2151 | ||
2152 | terminate_io (io_code); | |
2153 | ||
2154 | return MATCH_YES; | |
2155 | ||
2156 | syntax: | |
2157 | gfc_error ("Syntax error in %s statement at %C", io_kind_name (k)); | |
2158 | m = MATCH_ERROR; | |
2159 | ||
2160 | cleanup: | |
2161 | gfc_free_dt (dt); | |
2162 | return m; | |
2163 | } | |
2164 | ||
2165 | ||
2166 | match | |
2167 | gfc_match_read (void) | |
2168 | { | |
2169 | return match_io (M_READ); | |
2170 | } | |
2171 | ||
2172 | match | |
2173 | gfc_match_write (void) | |
2174 | { | |
2175 | return match_io (M_WRITE); | |
2176 | } | |
2177 | ||
2178 | match | |
2179 | gfc_match_print (void) | |
2180 | { | |
2181 | match m; | |
2182 | ||
2183 | m = match_io (M_PRINT); | |
2184 | if (m != MATCH_YES) | |
2185 | return m; | |
2186 | ||
2187 | if (gfc_pure (NULL)) | |
2188 | { | |
2189 | gfc_error ("PRINT statement at %C not allowed within PURE procedure"); | |
2190 | return MATCH_ERROR; | |
2191 | } | |
2192 | ||
2193 | return MATCH_YES; | |
2194 | } | |
2195 | ||
2196 | ||
2197 | /* Free a gfc_inquire structure. */ | |
2198 | ||
2199 | void | |
2200 | gfc_free_inquire (gfc_inquire * inquire) | |
2201 | { | |
2202 | ||
2203 | if (inquire == NULL) | |
2204 | return; | |
2205 | ||
2206 | gfc_free_expr (inquire->unit); | |
2207 | gfc_free_expr (inquire->file); | |
2208 | gfc_free_expr (inquire->iostat); | |
2209 | gfc_free_expr (inquire->exist); | |
2210 | gfc_free_expr (inquire->opened); | |
2211 | gfc_free_expr (inquire->number); | |
2212 | gfc_free_expr (inquire->named); | |
2213 | gfc_free_expr (inquire->name); | |
2214 | gfc_free_expr (inquire->access); | |
2215 | gfc_free_expr (inquire->sequential); | |
2216 | gfc_free_expr (inquire->direct); | |
2217 | gfc_free_expr (inquire->form); | |
2218 | gfc_free_expr (inquire->formatted); | |
2219 | gfc_free_expr (inquire->unformatted); | |
2220 | gfc_free_expr (inquire->recl); | |
2221 | gfc_free_expr (inquire->nextrec); | |
2222 | gfc_free_expr (inquire->blank); | |
2223 | gfc_free_expr (inquire->position); | |
2224 | gfc_free_expr (inquire->action); | |
2225 | gfc_free_expr (inquire->read); | |
2226 | gfc_free_expr (inquire->write); | |
2227 | gfc_free_expr (inquire->readwrite); | |
2228 | gfc_free_expr (inquire->delim); | |
2229 | gfc_free_expr (inquire->pad); | |
2230 | gfc_free_expr (inquire->iolength); | |
2231 | ||
2232 | gfc_free (inquire); | |
2233 | } | |
2234 | ||
2235 | ||
2236 | /* Match an element of an INQUIRE statement. */ | |
2237 | ||
2238 | #define RETM if (m != MATCH_NO) return m; | |
2239 | ||
2240 | static match | |
2241 | match_inquire_element (gfc_inquire * inquire) | |
2242 | { | |
2243 | match m; | |
2244 | ||
2245 | m = match_etag (&tag_unit, &inquire->unit); | |
2246 | RETM m = match_etag (&tag_file, &inquire->file); | |
2247 | RETM m = match_ltag (&tag_err, &inquire->err); | |
2248 | RETM m = match_vtag (&tag_iostat, &inquire->iostat); | |
2249 | RETM m = match_vtag (&tag_exist, &inquire->exist); | |
2250 | RETM m = match_vtag (&tag_opened, &inquire->opened); | |
2251 | RETM m = match_vtag (&tag_named, &inquire->named); | |
2252 | RETM m = match_vtag (&tag_name, &inquire->name); | |
2253 | RETM m = match_vtag (&tag_number, &inquire->number); | |
2254 | RETM m = match_vtag (&tag_s_access, &inquire->access); | |
2255 | RETM m = match_vtag (&tag_sequential, &inquire->sequential); | |
2256 | RETM m = match_vtag (&tag_direct, &inquire->direct); | |
2257 | RETM m = match_vtag (&tag_s_form, &inquire->form); | |
2258 | RETM m = match_vtag (&tag_formatted, &inquire->formatted); | |
2259 | RETM m = match_vtag (&tag_unformatted, &inquire->unformatted); | |
2260 | RETM m = match_vtag (&tag_s_recl, &inquire->recl); | |
2261 | RETM m = match_vtag (&tag_nextrec, &inquire->nextrec); | |
2262 | RETM m = match_vtag (&tag_s_blank, &inquire->blank); | |
2263 | RETM m = match_vtag (&tag_s_position, &inquire->position); | |
2264 | RETM m = match_vtag (&tag_s_action, &inquire->action); | |
2265 | RETM m = match_vtag (&tag_read, &inquire->read); | |
2266 | RETM m = match_vtag (&tag_write, &inquire->write); | |
2267 | RETM m = match_vtag (&tag_readwrite, &inquire->readwrite); | |
2268 | RETM m = match_vtag (&tag_s_delim, &inquire->delim); | |
2269 | RETM m = match_vtag (&tag_s_pad, &inquire->pad); | |
2270 | RETM m = match_vtag (&tag_iolength, &inquire->iolength); | |
2271 | RETM return MATCH_NO; | |
2272 | } | |
2273 | ||
2274 | #undef RETM | |
2275 | ||
2276 | ||
2277 | match | |
2278 | gfc_match_inquire (void) | |
2279 | { | |
2280 | gfc_inquire *inquire; | |
2281 | gfc_code *code; | |
2282 | match m; | |
2283 | ||
2284 | m = gfc_match_char ('('); | |
2285 | if (m == MATCH_NO) | |
2286 | return m; | |
2287 | ||
2288 | inquire = gfc_getmem (sizeof (gfc_inquire)); | |
2289 | ||
2290 | m = match_inquire_element (inquire); | |
2291 | if (m == MATCH_ERROR) | |
2292 | goto cleanup; | |
2293 | if (m == MATCH_NO) | |
2294 | { | |
2295 | m = gfc_match_expr (&inquire->unit); | |
2296 | if (m == MATCH_ERROR) | |
2297 | goto cleanup; | |
2298 | if (m == MATCH_NO) | |
2299 | goto syntax; | |
2300 | } | |
2301 | ||
2302 | /* See if we have the IOLENGTH form of the inquire statement. */ | |
2303 | if (inquire->iolength != NULL) | |
2304 | { | |
2305 | if (gfc_match_char (')') != MATCH_YES) | |
2306 | goto syntax; | |
2307 | ||
2308 | m = match_io_list (M_INQUIRE, &code); | |
2309 | if (m == MATCH_ERROR) | |
2310 | goto cleanup; | |
2311 | if (m == MATCH_NO) | |
2312 | goto syntax; | |
2313 | ||
2314 | terminate_io (code); | |
2315 | ||
2316 | new_st.op = EXEC_IOLENGTH; | |
2317 | new_st.expr = inquire->iolength; | |
2318 | gfc_free (inquire); | |
2319 | ||
2320 | if (gfc_pure (NULL)) | |
2321 | { | |
2322 | gfc_free_statements (code); | |
2323 | gfc_error ("INQUIRE statement not allowed in PURE procedure at %C"); | |
2324 | return MATCH_ERROR; | |
2325 | } | |
2326 | ||
2327 | new_st.next = code; | |
2328 | return MATCH_YES; | |
2329 | } | |
2330 | ||
2331 | /* At this point, we have the non-IOLENGTH inquire statement. */ | |
2332 | for (;;) | |
2333 | { | |
2334 | if (gfc_match_char (')') == MATCH_YES) | |
2335 | break; | |
2336 | if (gfc_match_char (',') != MATCH_YES) | |
2337 | goto syntax; | |
2338 | ||
2339 | m = match_inquire_element (inquire); | |
2340 | if (m == MATCH_ERROR) | |
2341 | goto cleanup; | |
2342 | if (m == MATCH_NO) | |
2343 | goto syntax; | |
2344 | ||
2345 | if (inquire->iolength != NULL) | |
2346 | { | |
2347 | gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C"); | |
2348 | goto cleanup; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | if (gfc_match_eos () != MATCH_YES) | |
2353 | goto syntax; | |
2354 | ||
2355 | if (gfc_pure (NULL)) | |
2356 | { | |
2357 | gfc_error ("INQUIRE statement not allowed in PURE procedure at %C"); | |
2358 | goto cleanup; | |
2359 | } | |
2360 | ||
2361 | new_st.op = EXEC_INQUIRE; | |
2362 | new_st.ext.inquire = inquire; | |
2363 | return MATCH_YES; | |
2364 | ||
2365 | syntax: | |
2366 | gfc_syntax_error (ST_INQUIRE); | |
2367 | ||
2368 | cleanup: | |
2369 | gfc_free_inquire (inquire); | |
2370 | return MATCH_ERROR; | |
2371 | } | |
2372 | ||
2373 | ||
2374 | /* Resolve everything in a gfc_inquire structure. */ | |
2375 | ||
2376 | try | |
2377 | gfc_resolve_inquire (gfc_inquire * inquire) | |
2378 | { | |
2379 | ||
2380 | RESOLVE_TAG (&tag_unit, inquire->unit); | |
2381 | RESOLVE_TAG (&tag_file, inquire->file); | |
2382 | RESOLVE_TAG (&tag_iostat, inquire->iostat); | |
2383 | RESOLVE_TAG (&tag_exist, inquire->exist); | |
2384 | RESOLVE_TAG (&tag_opened, inquire->opened); | |
2385 | RESOLVE_TAG (&tag_number, inquire->number); | |
2386 | RESOLVE_TAG (&tag_named, inquire->named); | |
2387 | RESOLVE_TAG (&tag_name, inquire->name); | |
2388 | RESOLVE_TAG (&tag_s_access, inquire->access); | |
2389 | RESOLVE_TAG (&tag_sequential, inquire->sequential); | |
2390 | RESOLVE_TAG (&tag_direct, inquire->direct); | |
2391 | RESOLVE_TAG (&tag_s_form, inquire->form); | |
2392 | RESOLVE_TAG (&tag_formatted, inquire->formatted); | |
2393 | RESOLVE_TAG (&tag_unformatted, inquire->unformatted); | |
2394 | RESOLVE_TAG (&tag_s_recl, inquire->recl); | |
2395 | RESOLVE_TAG (&tag_nextrec, inquire->nextrec); | |
2396 | RESOLVE_TAG (&tag_s_blank, inquire->blank); | |
2397 | RESOLVE_TAG (&tag_s_position, inquire->position); | |
2398 | RESOLVE_TAG (&tag_s_action, inquire->action); | |
2399 | RESOLVE_TAG (&tag_read, inquire->read); | |
2400 | RESOLVE_TAG (&tag_write, inquire->write); | |
2401 | RESOLVE_TAG (&tag_readwrite, inquire->readwrite); | |
2402 | RESOLVE_TAG (&tag_s_delim, inquire->delim); | |
2403 | RESOLVE_TAG (&tag_s_pad, inquire->pad); | |
2404 | ||
2405 | if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE) | |
2406 | return FAILURE; | |
2407 | ||
2408 | return FAILURE; | |
2409 | } |