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[thirdparty/gcc.git] / gcc / fortran / io.c
1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "config.h"
24 #include "system.h"
25 #include "flags.h"
26 #include "gfortran.h"
27 #include "match.h"
28 #include "parse.h"
29
30 gfc_st_label
31 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
32 0, {NULL, NULL}};
33
34 typedef struct
35 {
36 const char *name, *spec;
37 bt type;
38 }
39 io_tag;
40
41 static const io_tag
42 tag_file = { "FILE", " file = %e", BT_CHARACTER },
43 tag_status = { "STATUS", " status = %e", BT_CHARACTER},
44 tag_e_access = {"ACCESS", " access = %e", BT_CHARACTER},
45 tag_e_form = {"FORM", " form = %e", BT_CHARACTER},
46 tag_e_recl = {"RECL", " recl = %e", BT_INTEGER},
47 tag_e_blank = {"BLANK", " blank = %e", BT_CHARACTER},
48 tag_e_position = {"POSITION", " position = %e", BT_CHARACTER},
49 tag_e_action = {"ACTION", " action = %e", BT_CHARACTER},
50 tag_e_delim = {"DELIM", " delim = %e", BT_CHARACTER},
51 tag_e_pad = {"PAD", " pad = %e", BT_CHARACTER},
52 tag_unit = {"UNIT", " unit = %e", BT_INTEGER},
53 tag_advance = {"ADVANCE", " advance = %e", BT_CHARACTER},
54 tag_rec = {"REC", " rec = %e", BT_INTEGER},
55 tag_spos = {"POSITION", " pos = %e", BT_INTEGER},
56 tag_format = {"FORMAT", NULL, BT_CHARACTER},
57 tag_iomsg = {"IOMSG", " iomsg = %e", 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_convert = {"CONVERT", " convert = %e", BT_CHARACTER},
83 tag_strm_out = {"POS", " pos = %v", BT_INTEGER},
84 tag_err = {"ERR", " err = %l", BT_UNKNOWN},
85 tag_end = {"END", " end = %l", BT_UNKNOWN},
86 tag_eor = {"EOR", " eor = %l", BT_UNKNOWN};
87
88 static gfc_dt *current_dt;
89
90 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
91
92
93 /**************** Fortran 95 FORMAT parser *****************/
94
95 /* FORMAT tokens returned by format_lex(). */
96 typedef enum
97 {
98 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
99 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN,
100 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
101 FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
102 }
103 format_token;
104
105 /* Local variables for checking format strings. The saved_token is
106 used to back up by a single format token during the parsing
107 process. */
108 static char *format_string;
109 static int format_length, use_last_char;
110
111 static format_token saved_token;
112
113 static enum
114 { MODE_STRING, MODE_FORMAT, MODE_COPY }
115 mode;
116
117
118 /* Return the next character in the format string. */
119
120 static char
121 next_char (int in_string)
122 {
123 static char c;
124
125 if (use_last_char)
126 {
127 use_last_char = 0;
128 return c;
129 }
130
131 format_length++;
132
133 if (mode == MODE_STRING)
134 c = *format_string++;
135 else
136 {
137 c = gfc_next_char_literal (in_string);
138 if (c == '\n')
139 c = '\0';
140 }
141
142 if (gfc_option.flag_backslash && c == '\\')
143 {
144 int tmp;
145 locus old_locus = gfc_current_locus;
146
147 /* Use a temp variable to avoid side effects from gfc_match_special_char
148 since it uses an int * for its argument. */
149 tmp = (int)c;
150
151 if (gfc_match_special_char (&tmp) == MATCH_NO)
152 gfc_current_locus = old_locus;
153
154 c = (char)tmp;
155
156 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
157 gfc_warning ("Extension: backslash character at %C");
158 }
159
160 if (mode == MODE_COPY)
161 *format_string++ = c;
162
163 c = TOUPPER (c);
164 return c;
165 }
166
167
168 /* Back up one character position. Only works once. */
169
170 static void
171 unget_char (void)
172 {
173 use_last_char = 1;
174 }
175
176 /* Eat up the spaces and return a character. */
177
178 static char
179 next_char_not_space (void)
180 {
181 char c;
182 do
183 {
184 c = next_char (0);
185 }
186 while (gfc_is_whitespace (c));
187 return c;
188 }
189
190 static int value = 0;
191
192 /* Simple lexical analyzer for getting the next token in a FORMAT
193 statement. */
194
195 static format_token
196 format_lex (void)
197 {
198 format_token token;
199 char c, delim;
200 int zflag;
201 int negative_flag;
202
203 if (saved_token != FMT_NONE)
204 {
205 token = saved_token;
206 saved_token = FMT_NONE;
207 return token;
208 }
209
210 c = next_char_not_space ();
211
212 negative_flag = 0;
213 switch (c)
214 {
215 case '-':
216 negative_flag = 1;
217 case '+':
218 c = next_char_not_space ();
219 if (!ISDIGIT (c))
220 {
221 token = FMT_UNKNOWN;
222 break;
223 }
224
225 value = c - '0';
226
227 do
228 {
229 c = next_char_not_space ();
230 if (ISDIGIT (c))
231 value = 10 * value + c - '0';
232 }
233 while (ISDIGIT (c));
234
235 unget_char ();
236
237 if (negative_flag)
238 value = -value;
239
240 token = FMT_SIGNED_INT;
241 break;
242
243 case '0':
244 case '1':
245 case '2':
246 case '3':
247 case '4':
248 case '5':
249 case '6':
250 case '7':
251 case '8':
252 case '9':
253 zflag = (c == '0');
254
255 value = c - '0';
256
257 do
258 {
259 c = next_char_not_space ();
260 if (ISDIGIT (c))
261 {
262 value = 10 * value + c - '0';
263 if (c != '0')
264 zflag = 0;
265 }
266 }
267 while (ISDIGIT (c));
268
269 unget_char ();
270 token = zflag ? FMT_ZERO : FMT_POSINT;
271 break;
272
273 case '.':
274 token = FMT_PERIOD;
275 break;
276
277 case ',':
278 token = FMT_COMMA;
279 break;
280
281 case ':':
282 token = FMT_COLON;
283 break;
284
285 case '/':
286 token = FMT_SLASH;
287 break;
288
289 case '$':
290 token = FMT_DOLLAR;
291 break;
292
293 case 'T':
294 c = next_char_not_space ();
295 if (c != 'L' && c != 'R')
296 unget_char ();
297
298 token = FMT_POS;
299 break;
300
301 case '(':
302 token = FMT_LPAREN;
303 break;
304
305 case ')':
306 token = FMT_RPAREN;
307 break;
308
309 case 'X':
310 token = FMT_X;
311 break;
312
313 case 'S':
314 c = next_char_not_space ();
315 if (c != 'P' && c != 'S')
316 unget_char ();
317
318 token = FMT_SIGN;
319 break;
320
321 case 'B':
322 c = next_char_not_space ();
323 if (c == 'N' || c == 'Z')
324 token = FMT_BLANK;
325 else
326 {
327 unget_char ();
328 token = FMT_IBOZ;
329 }
330
331 break;
332
333 case '\'':
334 case '"':
335 delim = c;
336
337 value = 0;
338
339 for (;;)
340 {
341 c = next_char (1);
342 if (c == '\0')
343 {
344 token = FMT_END;
345 break;
346 }
347
348 if (c == delim)
349 {
350 c = next_char (1);
351
352 if (c == '\0')
353 {
354 token = FMT_END;
355 break;
356 }
357
358 if (c != delim)
359 {
360 unget_char ();
361 token = FMT_CHAR;
362 break;
363 }
364 }
365 value++;
366 }
367 break;
368
369 case 'P':
370 token = FMT_P;
371 break;
372
373 case 'I':
374 case 'O':
375 case 'Z':
376 token = FMT_IBOZ;
377 break;
378
379 case 'F':
380 token = FMT_F;
381 break;
382
383 case 'E':
384 c = next_char_not_space ();
385 if (c == 'N' || c == 'S')
386 token = FMT_EXT;
387 else
388 {
389 token = FMT_E;
390 unget_char ();
391 }
392
393 break;
394
395 case 'G':
396 token = FMT_G;
397 break;
398
399 case 'H':
400 token = FMT_H;
401 break;
402
403 case 'L':
404 token = FMT_L;
405 break;
406
407 case 'A':
408 token = FMT_A;
409 break;
410
411 case 'D':
412 token = FMT_D;
413 break;
414
415 case '\0':
416 token = FMT_END;
417 break;
418
419 default:
420 token = FMT_UNKNOWN;
421 break;
422 }
423
424 return token;
425 }
426
427
428 /* Check a format statement. The format string, either from a FORMAT
429 statement or a constant in an I/O statement has already been parsed
430 by itself, and we are checking it for validity. The dual origin
431 means that the warning message is a little less than great. */
432
433 static try
434 check_format (bool is_input)
435 {
436 const char *posint_required = _("Positive width required");
437 const char *nonneg_required = _("Nonnegative width required");
438 const char *unexpected_element = _("Unexpected element");
439 const char *unexpected_end = _("Unexpected end of format string");
440
441 const char *error;
442 format_token t, u;
443 int level;
444 int repeat;
445 try rv;
446
447 use_last_char = 0;
448 saved_token = FMT_NONE;
449 level = 0;
450 repeat = 0;
451 rv = SUCCESS;
452
453 t = format_lex ();
454 if (t != FMT_LPAREN)
455 {
456 error = _("Missing leading left parenthesis");
457 goto syntax;
458 }
459
460 t = format_lex ();
461 if (t == FMT_RPAREN)
462 goto finished; /* Empty format is legal */
463 saved_token = t;
464
465 format_item:
466 /* In this state, the next thing has to be a format item. */
467 t = format_lex ();
468 format_item_1:
469 switch (t)
470 {
471 case FMT_POSINT:
472 repeat = value;
473 t = format_lex ();
474 if (t == FMT_LPAREN)
475 {
476 level++;
477 goto format_item;
478 }
479
480 if (t == FMT_SLASH)
481 goto optional_comma;
482
483 goto data_desc;
484
485 case FMT_LPAREN:
486 level++;
487 goto format_item;
488
489 case FMT_SIGNED_INT:
490 case FMT_ZERO:
491 /* Signed integer can only precede a P format. */
492 t = format_lex ();
493 if (t != FMT_P)
494 {
495 error = _("Expected P edit descriptor");
496 goto syntax;
497 }
498
499 goto data_desc;
500
501 case FMT_P:
502 /* P requires a prior number. */
503 error = _("P descriptor requires leading scale factor");
504 goto syntax;
505
506 case FMT_X:
507 /* X requires a prior number if we're being pedantic. */
508 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
509 "requires leading space count at %C")
510 == FAILURE)
511 return FAILURE;
512 goto between_desc;
513
514 case FMT_SIGN:
515 case FMT_BLANK:
516 goto between_desc;
517
518 case FMT_CHAR:
519 goto extension_optional_comma;
520
521 case FMT_COLON:
522 case FMT_SLASH:
523 goto optional_comma;
524
525 case FMT_DOLLAR:
526 t = format_lex ();
527
528 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
529 == FAILURE)
530 return FAILURE;
531 if (t != FMT_RPAREN || level > 0)
532 {
533 gfc_warning ("$ should be the last specifier in format at %C");
534 goto optional_comma_1;
535 }
536
537 goto finished;
538
539 case FMT_POS:
540 case FMT_IBOZ:
541 case FMT_F:
542 case FMT_E:
543 case FMT_EXT:
544 case FMT_G:
545 case FMT_L:
546 case FMT_A:
547 case FMT_D:
548 case FMT_H:
549 goto data_desc;
550
551 case FMT_END:
552 error = unexpected_end;
553 goto syntax;
554
555 default:
556 error = unexpected_element;
557 goto syntax;
558 }
559
560 data_desc:
561 /* In this state, t must currently be a data descriptor.
562 Deal with things that can/must follow the descriptor. */
563 switch (t)
564 {
565 case FMT_SIGN:
566 case FMT_BLANK:
567 case FMT_X:
568 break;
569
570 case FMT_P:
571 if (pedantic)
572 {
573 t = format_lex ();
574 if (t == FMT_POSINT)
575 {
576 error = _("Repeat count cannot follow P descriptor");
577 goto syntax;
578 }
579
580 saved_token = t;
581 }
582
583 goto optional_comma;
584
585 case FMT_POS:
586 case FMT_L:
587 t = format_lex ();
588 if (t == FMT_POSINT)
589 break;
590
591 switch (gfc_notification_std (GFC_STD_GNU))
592 {
593 case WARNING:
594 gfc_warning ("Extension: Missing positive width after L "
595 "descriptor at %C");
596 saved_token = t;
597 break;
598
599 case ERROR:
600 error = posint_required;
601 goto syntax;
602
603 case SILENT:
604 saved_token = t;
605 break;
606
607 default:
608 gcc_unreachable ();
609 }
610 break;
611
612 case FMT_A:
613 t = format_lex ();
614 if (t != FMT_POSINT)
615 saved_token = t;
616 break;
617
618 case FMT_D:
619 case FMT_E:
620 case FMT_G:
621 case FMT_EXT:
622 u = format_lex ();
623 if (u != FMT_POSINT)
624 {
625 error = posint_required;
626 goto syntax;
627 }
628
629 u = format_lex ();
630 if (u != FMT_PERIOD)
631 {
632 /* Warn if -std=legacy, otherwise error. */
633 if (gfc_option.warn_std != 0)
634 gfc_error_now ("Period required in format specifier at %C");
635 else
636 gfc_warning ("Period required in format specifier at %C");
637 saved_token = u;
638 break;
639 }
640
641 u = format_lex ();
642 if (u != FMT_ZERO && u != FMT_POSINT)
643 {
644 error = nonneg_required;
645 goto syntax;
646 }
647
648 if (t == FMT_D)
649 break;
650
651 /* Look for optional exponent. */
652 u = format_lex ();
653 if (u != FMT_E)
654 {
655 saved_token = u;
656 }
657 else
658 {
659 u = format_lex ();
660 if (u != FMT_POSINT)
661 {
662 error = _("Positive exponent width required");
663 goto syntax;
664 }
665 }
666
667 break;
668
669 case FMT_F:
670 t = format_lex ();
671 if (t != FMT_ZERO && t != FMT_POSINT)
672 {
673 error = nonneg_required;
674 goto syntax;
675 }
676 else if (is_input && t == FMT_ZERO)
677 {
678 error = posint_required;
679 goto syntax;
680 }
681
682 t = format_lex ();
683 if (t != FMT_PERIOD)
684 {
685 /* Warn if -std=legacy, otherwise error. */
686 if (gfc_option.warn_std != 0)
687 gfc_error_now ("Period required in format specifier at %C");
688 else
689 gfc_warning ("Period required in format specifier at %C");
690 saved_token = t;
691 break;
692 }
693
694 t = format_lex ();
695 if (t != FMT_ZERO && t != FMT_POSINT)
696 {
697 error = nonneg_required;
698 goto syntax;
699 }
700
701 break;
702
703 case FMT_H:
704 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
705 gfc_warning ("The H format specifier at %C is"
706 " a Fortran 95 deleted feature");
707
708 if(mode == MODE_STRING)
709 {
710 format_string += value;
711 format_length -= value;
712 }
713 else
714 {
715 while (repeat >0)
716 {
717 next_char (1);
718 repeat -- ;
719 }
720 }
721 break;
722
723 case FMT_IBOZ:
724 t = format_lex ();
725 if (t != FMT_ZERO && t != FMT_POSINT)
726 {
727 error = nonneg_required;
728 goto syntax;
729 }
730 else if (is_input && t == FMT_ZERO)
731 {
732 error = posint_required;
733 goto syntax;
734 }
735
736 t = format_lex ();
737 if (t != FMT_PERIOD)
738 {
739 saved_token = t;
740 }
741 else
742 {
743 t = format_lex ();
744 if (t != FMT_ZERO && t != FMT_POSINT)
745 {
746 error = nonneg_required;
747 goto syntax;
748 }
749 }
750
751 break;
752
753 default:
754 error = unexpected_element;
755 goto syntax;
756 }
757
758 between_desc:
759 /* Between a descriptor and what comes next. */
760 t = format_lex ();
761 switch (t)
762 {
763
764 case FMT_COMMA:
765 goto format_item;
766
767 case FMT_RPAREN:
768 level--;
769 if (level < 0)
770 goto finished;
771 goto between_desc;
772
773 case FMT_COLON:
774 case FMT_SLASH:
775 goto optional_comma;
776
777 case FMT_END:
778 error = unexpected_end;
779 goto syntax;
780
781 default:
782 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
783 == FAILURE)
784 return FAILURE;
785 goto format_item_1;
786 }
787
788 optional_comma:
789 /* Optional comma is a weird between state where we've just finished
790 reading a colon, slash, dollar or P descriptor. */
791 t = format_lex ();
792 optional_comma_1:
793 switch (t)
794 {
795 case FMT_COMMA:
796 break;
797
798 case FMT_RPAREN:
799 level--;
800 if (level < 0)
801 goto finished;
802 goto between_desc;
803
804 default:
805 /* Assume that we have another format item. */
806 saved_token = t;
807 break;
808 }
809
810 goto format_item;
811
812 extension_optional_comma:
813 /* As a GNU extension, permit a missing comma after a string literal. */
814 t = format_lex ();
815 switch (t)
816 {
817 case FMT_COMMA:
818 break;
819
820 case FMT_RPAREN:
821 level--;
822 if (level < 0)
823 goto finished;
824 goto between_desc;
825
826 case FMT_COLON:
827 case FMT_SLASH:
828 goto optional_comma;
829
830 case FMT_END:
831 error = unexpected_end;
832 goto syntax;
833
834 default:
835 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
836 == FAILURE)
837 return FAILURE;
838 saved_token = t;
839 break;
840 }
841
842 goto format_item;
843
844 syntax:
845 gfc_error ("%s in format string at %C", error);
846
847 /* TODO: More elaborate measures are needed to show where a problem
848 is within a format string that has been calculated. */
849 rv = FAILURE;
850
851 finished:
852 return rv;
853 }
854
855
856 /* Given an expression node that is a constant string, see if it looks
857 like a format string. */
858
859 static try
860 check_format_string (gfc_expr *e, bool is_input)
861 {
862 mode = MODE_STRING;
863 format_string = e->value.character.string;
864 return check_format (is_input);
865 }
866
867
868 /************ Fortran 95 I/O statement matchers *************/
869
870 /* Match a FORMAT statement. This amounts to actually parsing the
871 format descriptors in order to correctly locate the end of the
872 format string. */
873
874 match
875 gfc_match_format (void)
876 {
877 gfc_expr *e;
878 locus start;
879
880 if (gfc_current_ns->proc_name
881 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
882 {
883 gfc_error ("Format statement in module main block at %C");
884 return MATCH_ERROR;
885 }
886
887 if (gfc_statement_label == NULL)
888 {
889 gfc_error ("Missing format label at %C");
890 return MATCH_ERROR;
891 }
892 gfc_gobble_whitespace ();
893
894 mode = MODE_FORMAT;
895 format_length = 0;
896
897 start = gfc_current_locus;
898
899 if (check_format (false) == FAILURE)
900 return MATCH_ERROR;
901
902 if (gfc_match_eos () != MATCH_YES)
903 {
904 gfc_syntax_error (ST_FORMAT);
905 return MATCH_ERROR;
906 }
907
908 /* The label doesn't get created until after the statement is done
909 being matched, so we have to leave the string for later. */
910
911 gfc_current_locus = start; /* Back to the beginning */
912
913 new_st.loc = start;
914 new_st.op = EXEC_NOP;
915
916 e = gfc_get_expr();
917 e->expr_type = EXPR_CONSTANT;
918 e->ts.type = BT_CHARACTER;
919 e->ts.kind = gfc_default_character_kind;
920 e->where = start;
921 e->value.character.string = format_string = gfc_getmem (format_length + 1);
922 e->value.character.length = format_length;
923 gfc_statement_label->format = e;
924
925 mode = MODE_COPY;
926 check_format (false); /* Guaranteed to succeed */
927 gfc_match_eos (); /* Guaranteed to succeed */
928
929 return MATCH_YES;
930 }
931
932
933 /* Match an expression I/O tag of some sort. */
934
935 static match
936 match_etag (const io_tag *tag, gfc_expr **v)
937 {
938 gfc_expr *result;
939 match m;
940
941 m = gfc_match (tag->spec, &result);
942 if (m != MATCH_YES)
943 return m;
944
945 if (*v != NULL)
946 {
947 gfc_error ("Duplicate %s specification at %C", tag->name);
948 gfc_free_expr (result);
949 return MATCH_ERROR;
950 }
951
952 *v = result;
953 return MATCH_YES;
954 }
955
956
957 /* Match a variable I/O tag of some sort. */
958
959 static match
960 match_vtag (const io_tag *tag, gfc_expr **v)
961 {
962 gfc_expr *result;
963 match m;
964
965 m = gfc_match (tag->spec, &result);
966 if (m != MATCH_YES)
967 return m;
968
969 if (*v != NULL)
970 {
971 gfc_error ("Duplicate %s specification at %C", tag->name);
972 gfc_free_expr (result);
973 return MATCH_ERROR;
974 }
975
976 if (result->symtree->n.sym->attr.intent == INTENT_IN)
977 {
978 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
979 gfc_free_expr (result);
980 return MATCH_ERROR;
981 }
982
983 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
984 {
985 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
986 gfc_free_expr (result);
987 return MATCH_ERROR;
988 }
989
990 *v = result;
991 return MATCH_YES;
992 }
993
994
995 /* Match I/O tags that cause variables to become redefined. */
996
997 static match
998 match_out_tag(const io_tag *tag, gfc_expr **result)
999 {
1000 match m;
1001
1002 m = match_vtag(tag, result);
1003 if (m == MATCH_YES)
1004 gfc_check_do_variable((*result)->symtree);
1005
1006 return m;
1007 }
1008
1009
1010 /* Match a label I/O tag. */
1011
1012 static match
1013 match_ltag (const io_tag *tag, gfc_st_label ** label)
1014 {
1015 match m;
1016 gfc_st_label *old;
1017
1018 old = *label;
1019 m = gfc_match (tag->spec, label);
1020 if (m == MATCH_YES && old != 0)
1021 {
1022 gfc_error ("Duplicate %s label specification at %C", tag->name);
1023 return MATCH_ERROR;
1024 }
1025
1026 if (m == MATCH_YES
1027 && gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1028 return MATCH_ERROR;
1029
1030 return m;
1031 }
1032
1033
1034 /* Do expression resolution and type-checking on an expression tag. */
1035
1036 static try
1037 resolve_tag (const io_tag *tag, gfc_expr *e)
1038 {
1039 if (e == NULL)
1040 return SUCCESS;
1041
1042 if (gfc_resolve_expr (e) == FAILURE)
1043 return FAILURE;
1044
1045 if (e->ts.type != tag->type && tag != &tag_format)
1046 {
1047 gfc_error ("%s tag at %L must be of type %s", tag->name,
1048 &e->where, gfc_basic_typename (tag->type));
1049 return FAILURE;
1050 }
1051
1052 if (tag == &tag_format)
1053 {
1054 if (e->expr_type == EXPR_CONSTANT
1055 && (e->ts.type != BT_CHARACTER
1056 || e->ts.kind != gfc_default_character_kind))
1057 {
1058 gfc_error ("Constant expression in FORMAT tag at %L must be "
1059 "of type default CHARACTER", &e->where);
1060 return FAILURE;
1061 }
1062
1063 /* If e's rank is zero and e is not an element of an array, it should be
1064 of integer or character type. The integer variable should be
1065 ASSIGNED. */
1066 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1067 || e->symtree->n.sym->as->rank == 0)
1068 {
1069 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1070 {
1071 gfc_error ("%s tag at %L must be of type %s or %s", tag->name,
1072 &e->where, gfc_basic_typename (BT_CHARACTER),
1073 gfc_basic_typename (BT_INTEGER));
1074 return FAILURE;
1075 }
1076 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1077 {
1078 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1079 "variable in FORMAT tag at %L", &e->where)
1080 == FAILURE)
1081 return FAILURE;
1082 if (e->symtree->n.sym->attr.assign != 1)
1083 {
1084 gfc_error ("Variable '%s' at %L has not been assigned a "
1085 "format label", e->symtree->n.sym->name,
1086 &e->where);
1087 return FAILURE;
1088 }
1089 }
1090 else if (e->ts.type == BT_INTEGER)
1091 {
1092 gfc_error ("scalar '%s' FORMAT tag at %L is not an ASSIGNED "
1093 "variable", gfc_basic_typename (e->ts.type),
1094 &e->where);
1095 return FAILURE;
1096 }
1097
1098 return SUCCESS;
1099 }
1100 else
1101 {
1102 /* if rank is nonzero, we allow the type to be character under
1103 GFC_STD_GNU and other type under GFC_STD_LEGACY. It may be
1104 assigned an Hollerith constant. */
1105 if (e->ts.type == BT_CHARACTER)
1106 {
1107 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1108 "in FORMAT tag at %L", &e->where)
1109 == FAILURE)
1110 return FAILURE;
1111 }
1112 else
1113 {
1114 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1115 "in FORMAT tag at %L", &e->where)
1116 == FAILURE)
1117 return FAILURE;
1118 }
1119 return SUCCESS;
1120 }
1121 }
1122 else
1123 {
1124 if (e->rank != 0)
1125 {
1126 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1127 return FAILURE;
1128 }
1129
1130 if (tag == &tag_iomsg)
1131 {
1132 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1133 &e->where) == FAILURE)
1134 return FAILURE;
1135 }
1136
1137 if (tag == &tag_iostat && e->ts.kind != gfc_default_integer_kind)
1138 {
1139 if (gfc_notify_std (GFC_STD_GNU, "Fortran 95 requires default "
1140 "INTEGER in IOSTAT tag at %L", &e->where)
1141 == FAILURE)
1142 return FAILURE;
1143 }
1144
1145 if (tag == &tag_size && e->ts.kind != gfc_default_integer_kind)
1146 {
1147 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1148 "INTEGER in SIZE tag at %L", &e->where)
1149 == FAILURE)
1150 return FAILURE;
1151 }
1152
1153 if (tag == &tag_convert)
1154 {
1155 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1156 &e->where) == FAILURE)
1157 return FAILURE;
1158 }
1159
1160 if (tag == &tag_iolength && e->ts.kind != gfc_default_integer_kind)
1161 {
1162 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1163 "INTEGER in IOLENGTH tag at %L", &e->where)
1164 == FAILURE)
1165 return FAILURE;
1166 }
1167 }
1168
1169 return SUCCESS;
1170 }
1171
1172
1173 /* Match a single tag of an OPEN statement. */
1174
1175 static match
1176 match_open_element (gfc_open *open)
1177 {
1178 match m;
1179
1180 m = match_etag (&tag_unit, &open->unit);
1181 if (m != MATCH_NO)
1182 return m;
1183 m = match_out_tag (&tag_iomsg, &open->iomsg);
1184 if (m != MATCH_NO)
1185 return m;
1186 m = match_out_tag (&tag_iostat, &open->iostat);
1187 if (m != MATCH_NO)
1188 return m;
1189 m = match_etag (&tag_file, &open->file);
1190 if (m != MATCH_NO)
1191 return m;
1192 m = match_etag (&tag_status, &open->status);
1193 if (m != MATCH_NO)
1194 return m;
1195 m = match_etag (&tag_e_access, &open->access);
1196 if (m != MATCH_NO)
1197 return m;
1198 m = match_etag (&tag_e_form, &open->form);
1199 if (m != MATCH_NO)
1200 return m;
1201 m = match_etag (&tag_e_recl, &open->recl);
1202 if (m != MATCH_NO)
1203 return m;
1204 m = match_etag (&tag_e_blank, &open->blank);
1205 if (m != MATCH_NO)
1206 return m;
1207 m = match_etag (&tag_e_position, &open->position);
1208 if (m != MATCH_NO)
1209 return m;
1210 m = match_etag (&tag_e_action, &open->action);
1211 if (m != MATCH_NO)
1212 return m;
1213 m = match_etag (&tag_e_delim, &open->delim);
1214 if (m != MATCH_NO)
1215 return m;
1216 m = match_etag (&tag_e_pad, &open->pad);
1217 if (m != MATCH_NO)
1218 return m;
1219 m = match_ltag (&tag_err, &open->err);
1220 if (m != MATCH_NO)
1221 return m;
1222 m = match_etag (&tag_convert, &open->convert);
1223 if (m != MATCH_NO)
1224 return m;
1225
1226 return MATCH_NO;
1227 }
1228
1229
1230 /* Free the gfc_open structure and all the expressions it contains. */
1231
1232 void
1233 gfc_free_open (gfc_open *open)
1234 {
1235 if (open == NULL)
1236 return;
1237
1238 gfc_free_expr (open->unit);
1239 gfc_free_expr (open->iomsg);
1240 gfc_free_expr (open->iostat);
1241 gfc_free_expr (open->file);
1242 gfc_free_expr (open->status);
1243 gfc_free_expr (open->access);
1244 gfc_free_expr (open->form);
1245 gfc_free_expr (open->recl);
1246 gfc_free_expr (open->blank);
1247 gfc_free_expr (open->position);
1248 gfc_free_expr (open->action);
1249 gfc_free_expr (open->delim);
1250 gfc_free_expr (open->pad);
1251 gfc_free_expr (open->convert);
1252 gfc_free (open);
1253 }
1254
1255
1256 /* Resolve everything in a gfc_open structure. */
1257
1258 try
1259 gfc_resolve_open (gfc_open *open)
1260 {
1261
1262 RESOLVE_TAG (&tag_unit, open->unit);
1263 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1264 RESOLVE_TAG (&tag_iostat, open->iostat);
1265 RESOLVE_TAG (&tag_file, open->file);
1266 RESOLVE_TAG (&tag_status, open->status);
1267 RESOLVE_TAG (&tag_e_access, open->access);
1268 RESOLVE_TAG (&tag_e_form, open->form);
1269 RESOLVE_TAG (&tag_e_recl, open->recl);
1270 RESOLVE_TAG (&tag_e_blank, open->blank);
1271 RESOLVE_TAG (&tag_e_position, open->position);
1272 RESOLVE_TAG (&tag_e_action, open->action);
1273 RESOLVE_TAG (&tag_e_delim, open->delim);
1274 RESOLVE_TAG (&tag_e_pad, open->pad);
1275 RESOLVE_TAG (&tag_convert, open->convert);
1276
1277 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1278 return FAILURE;
1279
1280 return SUCCESS;
1281 }
1282
1283
1284 /* Check if a given value for a SPECIFIER is either in the list of values
1285 allowed in F95 or F2003, issuing an error message and returning a zero
1286 value if it is not allowed. */
1287
1288 static int
1289 compare_to_allowed_values (const char *specifier, const char *allowed[],
1290 const char *allowed_f2003[],
1291 const char *allowed_gnu[], char *value,
1292 const char *statement, bool warn)
1293 {
1294 int i;
1295 unsigned int len;
1296
1297 len = strlen (value);
1298 if (len > 0)
1299 {
1300 for (len--; len > 0; len--)
1301 if (value[len] != ' ')
1302 break;
1303 len++;
1304 }
1305
1306 for (i = 0; allowed[i]; i++)
1307 if (len == strlen (allowed[i])
1308 && strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1309 return 1;
1310
1311 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1312 if (len == strlen (allowed_f2003[i])
1313 && strncasecmp (value, allowed_f2003[i], strlen (allowed_f2003[i]))
1314 == 0)
1315 {
1316 notification n = gfc_notification_std (GFC_STD_F2003);
1317
1318 if (n == WARNING || (warn && n == ERROR))
1319 {
1320 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1321 "has value '%s'", specifier, statement,
1322 allowed_f2003[i]);
1323 return 1;
1324 }
1325 else
1326 if (n == ERROR)
1327 {
1328 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1329 "%s statement at %C has value '%s'", specifier,
1330 statement, allowed_f2003[i]);
1331 return 0;
1332 }
1333
1334 /* n == SILENT */
1335 return 1;
1336 }
1337
1338 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1339 if (len == strlen (allowed_gnu[i])
1340 && strncasecmp (value, allowed_gnu[i], strlen (allowed_gnu[i])) == 0)
1341 {
1342 notification n = gfc_notification_std (GFC_STD_GNU);
1343
1344 if (n == WARNING || (warn && n == ERROR))
1345 {
1346 gfc_warning ("Extension: %s specifier in %s statement at %C "
1347 "has value '%s'", specifier, statement,
1348 allowed_gnu[i]);
1349 return 1;
1350 }
1351 else
1352 if (n == ERROR)
1353 {
1354 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1355 "%s statement at %C has value '%s'", specifier,
1356 statement, allowed_gnu[i]);
1357 return 0;
1358 }
1359
1360 /* n == SILENT */
1361 return 1;
1362 }
1363
1364 if (warn)
1365 {
1366 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1367 specifier, statement, value);
1368 return 1;
1369 }
1370 else
1371 {
1372 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1373 specifier, statement, value);
1374 return 0;
1375 }
1376 }
1377
1378
1379 /* Match an OPEN statement. */
1380
1381 match
1382 gfc_match_open (void)
1383 {
1384 gfc_open *open;
1385 match m;
1386 bool warn;
1387
1388 m = gfc_match_char ('(');
1389 if (m == MATCH_NO)
1390 return m;
1391
1392 open = gfc_getmem (sizeof (gfc_open));
1393
1394 m = match_open_element (open);
1395
1396 if (m == MATCH_ERROR)
1397 goto cleanup;
1398 if (m == MATCH_NO)
1399 {
1400 m = gfc_match_expr (&open->unit);
1401 if (m == MATCH_NO)
1402 goto syntax;
1403 if (m == MATCH_ERROR)
1404 goto cleanup;
1405 }
1406
1407 for (;;)
1408 {
1409 if (gfc_match_char (')') == MATCH_YES)
1410 break;
1411 if (gfc_match_char (',') != MATCH_YES)
1412 goto syntax;
1413
1414 m = match_open_element (open);
1415 if (m == MATCH_ERROR)
1416 goto cleanup;
1417 if (m == MATCH_NO)
1418 goto syntax;
1419 }
1420
1421 if (gfc_match_eos () == MATCH_NO)
1422 goto syntax;
1423
1424 if (gfc_pure (NULL))
1425 {
1426 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1427 goto cleanup;
1428 }
1429
1430 warn = (open->err || open->iostat) ? true : false;
1431 /* Checks on the ACCESS specifier. */
1432 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1433 {
1434 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1435 static const char *access_f2003[] = { "STREAM", NULL };
1436 static const char *access_gnu[] = { "APPEND", NULL };
1437
1438 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1439 access_gnu,
1440 open->access->value.character.string,
1441 "OPEN", warn))
1442 goto cleanup;
1443 }
1444
1445 /* Checks on the ACTION specifier. */
1446 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1447 {
1448 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1449
1450 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1451 open->action->value.character.string,
1452 "OPEN", warn))
1453 goto cleanup;
1454 }
1455
1456 /* Checks on the ASYNCHRONOUS specifier. */
1457 /* TODO: code is ready, just needs uncommenting when async I/O support
1458 is added ;-)
1459 if (open->asynchronous && open->asynchronous->expr_type == EXPR_CONSTANT)
1460 {
1461 static const char * asynchronous[] = { "YES", "NO", NULL };
1462
1463 if (!compare_to_allowed_values
1464 ("action", asynchronous, NULL, NULL,
1465 open->asynchronous->value.character.string, "OPEN", warn))
1466 goto cleanup;
1467 }*/
1468
1469 /* Checks on the BLANK specifier. */
1470 if (open->blank && open->blank->expr_type == EXPR_CONSTANT)
1471 {
1472 static const char *blank[] = { "ZERO", "NULL", NULL };
1473
1474 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1475 open->blank->value.character.string,
1476 "OPEN", warn))
1477 goto cleanup;
1478 }
1479
1480 /* Checks on the DECIMAL specifier. */
1481 /* TODO: uncomment this code when DECIMAL support is added
1482 if (open->decimal && open->decimal->expr_type == EXPR_CONSTANT)
1483 {
1484 static const char * decimal[] = { "COMMA", "POINT", NULL };
1485
1486 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1487 open->decimal->value.character.string,
1488 "OPEN", warn))
1489 goto cleanup;
1490 } */
1491
1492 /* Checks on the DELIM specifier. */
1493 if (open->delim && open->delim->expr_type == EXPR_CONSTANT)
1494 {
1495 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1496
1497 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1498 open->delim->value.character.string,
1499 "OPEN", warn))
1500 goto cleanup;
1501 }
1502
1503 /* Checks on the ENCODING specifier. */
1504 /* TODO: uncomment this code when ENCODING support is added
1505 if (open->encoding && open->encoding->expr_type == EXPR_CONSTANT)
1506 {
1507 static const char * encoding[] = { "UTF-8", "DEFAULT", NULL };
1508
1509 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1510 open->encoding->value.character.string,
1511 "OPEN", warn))
1512 goto cleanup;
1513 } */
1514
1515 /* Checks on the FORM specifier. */
1516 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1517 {
1518 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1519
1520 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1521 open->form->value.character.string,
1522 "OPEN", warn))
1523 goto cleanup;
1524 }
1525
1526 /* Checks on the PAD specifier. */
1527 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1528 {
1529 static const char *pad[] = { "YES", "NO", NULL };
1530
1531 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1532 open->pad->value.character.string,
1533 "OPEN", warn))
1534 goto cleanup;
1535 }
1536
1537 /* Checks on the POSITION specifier. */
1538 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1539 {
1540 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1541
1542 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1543 open->position->value.character.string,
1544 "OPEN", warn))
1545 goto cleanup;
1546 }
1547
1548 /* Checks on the ROUND specifier. */
1549 /* TODO: uncomment this code when ROUND support is added
1550 if (open->round && open->round->expr_type == EXPR_CONSTANT)
1551 {
1552 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1553 "COMPATIBLE", "PROCESSOR_DEFINED", NULL };
1554
1555 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1556 open->round->value.character.string,
1557 "OPEN", warn))
1558 goto cleanup;
1559 } */
1560
1561 /* Checks on the SIGN specifier. */
1562 /* TODO: uncomment this code when SIGN support is added
1563 if (open->sign && open->sign->expr_type == EXPR_CONSTANT)
1564 {
1565 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1566 NULL };
1567
1568 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1569 open->sign->value.character.string,
1570 "OPEN", warn))
1571 goto cleanup;
1572 } */
1573
1574 #define warn_or_error(...) \
1575 { \
1576 if (warn) \
1577 gfc_warning (__VA_ARGS__); \
1578 else \
1579 { \
1580 gfc_error (__VA_ARGS__); \
1581 goto cleanup; \
1582 } \
1583 }
1584
1585 /* Checks on the RECL specifier. */
1586 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1587 && open->recl->ts.type == BT_INTEGER
1588 && mpz_sgn (open->recl->value.integer) != 1)
1589 {
1590 warn_or_error ("RECL in OPEN statement at %C must be positive");
1591 }
1592
1593 /* Checks on the STATUS specifier. */
1594 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1595 {
1596 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1597 "REPLACE", "UNKNOWN", NULL };
1598
1599 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1600 open->status->value.character.string,
1601 "OPEN", warn))
1602 goto cleanup;
1603
1604 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1605 the FILE= specifier shall appear. */
1606 if (open->file == NULL
1607 && (strncasecmp (open->status->value.character.string, "replace", 7)
1608 == 0
1609 || strncasecmp (open->status->value.character.string, "new", 3)
1610 == 0))
1611 {
1612 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1613 "'%s' and no FILE specifier is present",
1614 open->status->value.character.string);
1615 }
1616
1617 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1618 the FILE= specifier shall not appear. */
1619 if (strncasecmp (open->status->value.character.string, "scratch", 7)
1620 == 0 && open->file)
1621 {
1622 warn_or_error ("The STATUS specified in OPEN statement at %C "
1623 "cannot have the value SCRATCH if a FILE specifier "
1624 "is present");
1625 }
1626 }
1627
1628 /* Things that are not allowed for unformatted I/O. */
1629 if (open->form && open->form->expr_type == EXPR_CONSTANT
1630 && (open->delim
1631 /* TODO uncomment this code when F2003 support is finished */
1632 /* || open->decimal || open->encoding || open->round
1633 || open->sign */
1634 || open->pad || open->blank)
1635 && strncasecmp (open->form->value.character.string,
1636 "unformatted", 11) == 0)
1637 {
1638 const char *spec = (open->delim ? "DELIM "
1639 : (open->pad ? "PAD " : open->blank
1640 ? "BLANK " : ""));
1641
1642 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1643 "unformatted I/O", spec);
1644 }
1645
1646 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1647 && strncasecmp (open->access->value.character.string, "stream", 6) == 0)
1648 {
1649 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1650 "stream I/O");
1651 }
1652
1653 if (open->position
1654 && open->access && open->access->expr_type == EXPR_CONSTANT
1655 && !(strncasecmp (open->access->value.character.string,
1656 "sequential", 10) == 0
1657 || strncasecmp (open->access->value.character.string,
1658 "stream", 6) == 0
1659 || strncasecmp (open->access->value.character.string,
1660 "append", 6) == 0))
1661 {
1662 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1663 "for stream or sequential ACCESS");
1664 }
1665
1666 #undef warn_or_error
1667
1668 new_st.op = EXEC_OPEN;
1669 new_st.ext.open = open;
1670 return MATCH_YES;
1671
1672 syntax:
1673 gfc_syntax_error (ST_OPEN);
1674
1675 cleanup:
1676 gfc_free_open (open);
1677 return MATCH_ERROR;
1678 }
1679
1680
1681 /* Free a gfc_close structure an all its expressions. */
1682
1683 void
1684 gfc_free_close (gfc_close *close)
1685 {
1686 if (close == NULL)
1687 return;
1688
1689 gfc_free_expr (close->unit);
1690 gfc_free_expr (close->iomsg);
1691 gfc_free_expr (close->iostat);
1692 gfc_free_expr (close->status);
1693 gfc_free (close);
1694 }
1695
1696
1697 /* Match elements of a CLOSE statement. */
1698
1699 static match
1700 match_close_element (gfc_close *close)
1701 {
1702 match m;
1703
1704 m = match_etag (&tag_unit, &close->unit);
1705 if (m != MATCH_NO)
1706 return m;
1707 m = match_etag (&tag_status, &close->status);
1708 if (m != MATCH_NO)
1709 return m;
1710 m = match_out_tag (&tag_iomsg, &close->iomsg);
1711 if (m != MATCH_NO)
1712 return m;
1713 m = match_out_tag (&tag_iostat, &close->iostat);
1714 if (m != MATCH_NO)
1715 return m;
1716 m = match_ltag (&tag_err, &close->err);
1717 if (m != MATCH_NO)
1718 return m;
1719
1720 return MATCH_NO;
1721 }
1722
1723
1724 /* Match a CLOSE statement. */
1725
1726 match
1727 gfc_match_close (void)
1728 {
1729 gfc_close *close;
1730 match m;
1731 bool warn;
1732
1733 m = gfc_match_char ('(');
1734 if (m == MATCH_NO)
1735 return m;
1736
1737 close = gfc_getmem (sizeof (gfc_close));
1738
1739 m = match_close_element (close);
1740
1741 if (m == MATCH_ERROR)
1742 goto cleanup;
1743 if (m == MATCH_NO)
1744 {
1745 m = gfc_match_expr (&close->unit);
1746 if (m == MATCH_NO)
1747 goto syntax;
1748 if (m == MATCH_ERROR)
1749 goto cleanup;
1750 }
1751
1752 for (;;)
1753 {
1754 if (gfc_match_char (')') == MATCH_YES)
1755 break;
1756 if (gfc_match_char (',') != MATCH_YES)
1757 goto syntax;
1758
1759 m = match_close_element (close);
1760 if (m == MATCH_ERROR)
1761 goto cleanup;
1762 if (m == MATCH_NO)
1763 goto syntax;
1764 }
1765
1766 if (gfc_match_eos () == MATCH_NO)
1767 goto syntax;
1768
1769 if (gfc_pure (NULL))
1770 {
1771 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1772 goto cleanup;
1773 }
1774
1775 warn = (close->iostat || close->err) ? true : false;
1776
1777 /* Checks on the STATUS specifier. */
1778 if (close->status && close->status->expr_type == EXPR_CONSTANT)
1779 {
1780 static const char *status[] = { "KEEP", "DELETE", NULL };
1781
1782 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1783 close->status->value.character.string,
1784 "CLOSE", warn))
1785 goto cleanup;
1786 }
1787
1788 new_st.op = EXEC_CLOSE;
1789 new_st.ext.close = close;
1790 return MATCH_YES;
1791
1792 syntax:
1793 gfc_syntax_error (ST_CLOSE);
1794
1795 cleanup:
1796 gfc_free_close (close);
1797 return MATCH_ERROR;
1798 }
1799
1800
1801 /* Resolve everything in a gfc_close structure. */
1802
1803 try
1804 gfc_resolve_close (gfc_close *close)
1805 {
1806 RESOLVE_TAG (&tag_unit, close->unit);
1807 RESOLVE_TAG (&tag_iomsg, close->iomsg);
1808 RESOLVE_TAG (&tag_iostat, close->iostat);
1809 RESOLVE_TAG (&tag_status, close->status);
1810
1811 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
1812 return FAILURE;
1813
1814 return SUCCESS;
1815 }
1816
1817
1818 /* Free a gfc_filepos structure. */
1819
1820 void
1821 gfc_free_filepos (gfc_filepos *fp)
1822 {
1823 gfc_free_expr (fp->unit);
1824 gfc_free_expr (fp->iomsg);
1825 gfc_free_expr (fp->iostat);
1826 gfc_free (fp);
1827 }
1828
1829
1830 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
1831
1832 static match
1833 match_file_element (gfc_filepos *fp)
1834 {
1835 match m;
1836
1837 m = match_etag (&tag_unit, &fp->unit);
1838 if (m != MATCH_NO)
1839 return m;
1840 m = match_out_tag (&tag_iomsg, &fp->iomsg);
1841 if (m != MATCH_NO)
1842 return m;
1843 m = match_out_tag (&tag_iostat, &fp->iostat);
1844 if (m != MATCH_NO)
1845 return m;
1846 m = match_ltag (&tag_err, &fp->err);
1847 if (m != MATCH_NO)
1848 return m;
1849
1850 return MATCH_NO;
1851 }
1852
1853
1854 /* Match the second half of the file-positioning statements, REWIND,
1855 BACKSPACE, ENDFILE, or the FLUSH statement. */
1856
1857 static match
1858 match_filepos (gfc_statement st, gfc_exec_op op)
1859 {
1860 gfc_filepos *fp;
1861 match m;
1862
1863 fp = gfc_getmem (sizeof (gfc_filepos));
1864
1865 if (gfc_match_char ('(') == MATCH_NO)
1866 {
1867 m = gfc_match_expr (&fp->unit);
1868 if (m == MATCH_ERROR)
1869 goto cleanup;
1870 if (m == MATCH_NO)
1871 goto syntax;
1872
1873 goto done;
1874 }
1875
1876 m = match_file_element (fp);
1877 if (m == MATCH_ERROR)
1878 goto done;
1879 if (m == MATCH_NO)
1880 {
1881 m = gfc_match_expr (&fp->unit);
1882 if (m == MATCH_ERROR)
1883 goto done;
1884 if (m == MATCH_NO)
1885 goto syntax;
1886 }
1887
1888 for (;;)
1889 {
1890 if (gfc_match_char (')') == MATCH_YES)
1891 break;
1892 if (gfc_match_char (',') != MATCH_YES)
1893 goto syntax;
1894
1895 m = match_file_element (fp);
1896 if (m == MATCH_ERROR)
1897 goto cleanup;
1898 if (m == MATCH_NO)
1899 goto syntax;
1900 }
1901
1902 done:
1903 if (gfc_match_eos () != MATCH_YES)
1904 goto syntax;
1905
1906 if (gfc_pure (NULL))
1907 {
1908 gfc_error ("%s statement not allowed in PURE procedure at %C",
1909 gfc_ascii_statement (st));
1910
1911 goto cleanup;
1912 }
1913
1914 new_st.op = op;
1915 new_st.ext.filepos = fp;
1916 return MATCH_YES;
1917
1918 syntax:
1919 gfc_syntax_error (st);
1920
1921 cleanup:
1922 gfc_free_filepos (fp);
1923 return MATCH_ERROR;
1924 }
1925
1926
1927 try
1928 gfc_resolve_filepos (gfc_filepos *fp)
1929 {
1930 RESOLVE_TAG (&tag_unit, fp->unit);
1931 RESOLVE_TAG (&tag_iostat, fp->iostat);
1932 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
1933 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
1934 return FAILURE;
1935
1936 return SUCCESS;
1937 }
1938
1939
1940 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
1941 and the FLUSH statement. */
1942
1943 match
1944 gfc_match_endfile (void)
1945 {
1946 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
1947 }
1948
1949 match
1950 gfc_match_backspace (void)
1951 {
1952 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
1953 }
1954
1955 match
1956 gfc_match_rewind (void)
1957 {
1958 return match_filepos (ST_REWIND, EXEC_REWIND);
1959 }
1960
1961 match
1962 gfc_match_flush (void)
1963 {
1964 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
1965 == FAILURE)
1966 return MATCH_ERROR;
1967
1968 return match_filepos (ST_FLUSH, EXEC_FLUSH);
1969 }
1970
1971 /******************** Data Transfer Statements *********************/
1972
1973 typedef enum
1974 { M_READ, M_WRITE, M_PRINT, M_INQUIRE }
1975 io_kind;
1976
1977
1978 /* Return a default unit number. */
1979
1980 static gfc_expr *
1981 default_unit (io_kind k)
1982 {
1983 int unit;
1984
1985 if (k == M_READ)
1986 unit = 5;
1987 else
1988 unit = 6;
1989
1990 return gfc_int_expr (unit);
1991 }
1992
1993
1994 /* Match a unit specification for a data transfer statement. */
1995
1996 static match
1997 match_dt_unit (io_kind k, gfc_dt *dt)
1998 {
1999 gfc_expr *e;
2000
2001 if (gfc_match_char ('*') == MATCH_YES)
2002 {
2003 if (dt->io_unit != NULL)
2004 goto conflict;
2005
2006 dt->io_unit = default_unit (k);
2007 return MATCH_YES;
2008 }
2009
2010 if (gfc_match_expr (&e) == MATCH_YES)
2011 {
2012 if (dt->io_unit != NULL)
2013 {
2014 gfc_free_expr (e);
2015 goto conflict;
2016 }
2017
2018 dt->io_unit = e;
2019 return MATCH_YES;
2020 }
2021
2022 return MATCH_NO;
2023
2024 conflict:
2025 gfc_error ("Duplicate UNIT specification at %C");
2026 return MATCH_ERROR;
2027 }
2028
2029
2030 /* Match a format specification. */
2031
2032 static match
2033 match_dt_format (gfc_dt *dt)
2034 {
2035 locus where;
2036 gfc_expr *e;
2037 gfc_st_label *label;
2038
2039 where = gfc_current_locus;
2040
2041 if (gfc_match_char ('*') == MATCH_YES)
2042 {
2043 if (dt->format_expr != NULL || dt->format_label != NULL)
2044 goto conflict;
2045
2046 dt->format_label = &format_asterisk;
2047 return MATCH_YES;
2048 }
2049
2050 if (gfc_match_st_label (&label) == MATCH_YES)
2051 {
2052 if (dt->format_expr != NULL || dt->format_label != NULL)
2053 {
2054 gfc_free_st_label (label);
2055 goto conflict;
2056 }
2057
2058 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2059 return MATCH_ERROR;
2060
2061 dt->format_label = label;
2062 return MATCH_YES;
2063 }
2064
2065 if (gfc_match_expr (&e) == MATCH_YES)
2066 {
2067 if (dt->format_expr != NULL || dt->format_label != NULL)
2068 {
2069 gfc_free_expr (e);
2070 goto conflict;
2071 }
2072 dt->format_expr = e;
2073 return MATCH_YES;
2074 }
2075
2076 gfc_current_locus = where; /* The only case where we have to restore */
2077
2078 return MATCH_NO;
2079
2080 conflict:
2081 gfc_error ("Duplicate format specification at %C");
2082 return MATCH_ERROR;
2083 }
2084
2085
2086 /* Traverse a namelist that is part of a READ statement to make sure
2087 that none of the variables in the namelist are INTENT(IN). Returns
2088 nonzero if we find such a variable. */
2089
2090 static int
2091 check_namelist (gfc_symbol *sym)
2092 {
2093 gfc_namelist *p;
2094
2095 for (p = sym->namelist; p; p = p->next)
2096 if (p->sym->attr.intent == INTENT_IN)
2097 {
2098 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2099 p->sym->name, sym->name);
2100 return 1;
2101 }
2102
2103 return 0;
2104 }
2105
2106
2107 /* Match a single data transfer element. */
2108
2109 static match
2110 match_dt_element (io_kind k, gfc_dt *dt)
2111 {
2112 char name[GFC_MAX_SYMBOL_LEN + 1];
2113 gfc_symbol *sym;
2114 match m;
2115
2116 if (gfc_match (" unit =") == MATCH_YES)
2117 {
2118 m = match_dt_unit (k, dt);
2119 if (m != MATCH_NO)
2120 return m;
2121 }
2122
2123 if (gfc_match (" fmt =") == MATCH_YES)
2124 {
2125 m = match_dt_format (dt);
2126 if (m != MATCH_NO)
2127 return m;
2128 }
2129
2130 if (gfc_match (" nml = %n", name) == MATCH_YES)
2131 {
2132 if (dt->namelist != NULL)
2133 {
2134 gfc_error ("Duplicate NML specification at %C");
2135 return MATCH_ERROR;
2136 }
2137
2138 if (gfc_find_symbol (name, NULL, 1, &sym))
2139 return MATCH_ERROR;
2140
2141 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2142 {
2143 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2144 sym != NULL ? sym->name : name);
2145 return MATCH_ERROR;
2146 }
2147
2148 dt->namelist = sym;
2149 if (k == M_READ && check_namelist (sym))
2150 return MATCH_ERROR;
2151
2152 return MATCH_YES;
2153 }
2154
2155 m = match_etag (&tag_rec, &dt->rec);
2156 if (m != MATCH_NO)
2157 return m;
2158 m = match_etag (&tag_spos, &dt->rec);
2159 if (m != MATCH_NO)
2160 return m;
2161 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2162 if (m != MATCH_NO)
2163 return m;
2164 m = match_out_tag (&tag_iostat, &dt->iostat);
2165 if (m != MATCH_NO)
2166 return m;
2167 m = match_ltag (&tag_err, &dt->err);
2168 if (m == MATCH_YES)
2169 dt->err_where = gfc_current_locus;
2170 if (m != MATCH_NO)
2171 return m;
2172 m = match_etag (&tag_advance, &dt->advance);
2173 if (m != MATCH_NO)
2174 return m;
2175 m = match_out_tag (&tag_size, &dt->size);
2176 if (m != MATCH_NO)
2177 return m;
2178
2179 m = match_ltag (&tag_end, &dt->end);
2180 if (m == MATCH_YES)
2181 {
2182 if (k == M_WRITE)
2183 {
2184 gfc_error ("END tag at %C not allowed in output statement");
2185 return MATCH_ERROR;
2186 }
2187 dt->end_where = gfc_current_locus;
2188 }
2189 if (m != MATCH_NO)
2190 return m;
2191
2192 m = match_ltag (&tag_eor, &dt->eor);
2193 if (m == MATCH_YES)
2194 dt->eor_where = gfc_current_locus;
2195 if (m != MATCH_NO)
2196 return m;
2197
2198 return MATCH_NO;
2199 }
2200
2201
2202 /* Free a data transfer structure and everything below it. */
2203
2204 void
2205 gfc_free_dt (gfc_dt *dt)
2206 {
2207 if (dt == NULL)
2208 return;
2209
2210 gfc_free_expr (dt->io_unit);
2211 gfc_free_expr (dt->format_expr);
2212 gfc_free_expr (dt->rec);
2213 gfc_free_expr (dt->advance);
2214 gfc_free_expr (dt->iomsg);
2215 gfc_free_expr (dt->iostat);
2216 gfc_free_expr (dt->size);
2217 gfc_free (dt);
2218 }
2219
2220
2221 /* Resolve everything in a gfc_dt structure. */
2222
2223 try
2224 gfc_resolve_dt (gfc_dt *dt)
2225 {
2226 gfc_expr *e;
2227
2228 RESOLVE_TAG (&tag_format, dt->format_expr);
2229 RESOLVE_TAG (&tag_rec, dt->rec);
2230 RESOLVE_TAG (&tag_spos, dt->rec);
2231 RESOLVE_TAG (&tag_advance, dt->advance);
2232 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2233 RESOLVE_TAG (&tag_iostat, dt->iostat);
2234 RESOLVE_TAG (&tag_size, dt->size);
2235
2236 e = dt->io_unit;
2237 if (gfc_resolve_expr (e) == SUCCESS
2238 && (e->ts.type != BT_INTEGER
2239 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2240 {
2241 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2242 "or a CHARACTER variable", &e->where);
2243 return FAILURE;
2244 }
2245
2246 if (e->ts.type == BT_CHARACTER)
2247 {
2248 if (gfc_has_vector_index (e))
2249 {
2250 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2251 return FAILURE;
2252 }
2253 }
2254
2255 if (e->rank && e->ts.type != BT_CHARACTER)
2256 {
2257 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2258 return FAILURE;
2259 }
2260
2261 if (dt->err)
2262 {
2263 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2264 return FAILURE;
2265 if (dt->err->defined == ST_LABEL_UNKNOWN)
2266 {
2267 gfc_error ("ERR tag label %d at %L not defined",
2268 dt->err->value, &dt->err_where);
2269 return FAILURE;
2270 }
2271 }
2272
2273 if (dt->end)
2274 {
2275 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2276 return FAILURE;
2277 if (dt->end->defined == ST_LABEL_UNKNOWN)
2278 {
2279 gfc_error ("END tag label %d at %L not defined",
2280 dt->end->value, &dt->end_where);
2281 return FAILURE;
2282 }
2283 }
2284
2285 if (dt->eor)
2286 {
2287 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2288 return FAILURE;
2289 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2290 {
2291 gfc_error ("EOR tag label %d at %L not defined",
2292 dt->eor->value, &dt->eor_where);
2293 return FAILURE;
2294 }
2295 }
2296
2297 /* Check the format label actually exists. */
2298 if (dt->format_label && dt->format_label != &format_asterisk
2299 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2300 {
2301 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2302 &dt->format_label->where);
2303 return FAILURE;
2304 }
2305 return SUCCESS;
2306 }
2307
2308
2309 /* Given an io_kind, return its name. */
2310
2311 static const char *
2312 io_kind_name (io_kind k)
2313 {
2314 const char *name;
2315
2316 switch (k)
2317 {
2318 case M_READ:
2319 name = "READ";
2320 break;
2321 case M_WRITE:
2322 name = "WRITE";
2323 break;
2324 case M_PRINT:
2325 name = "PRINT";
2326 break;
2327 case M_INQUIRE:
2328 name = "INQUIRE";
2329 break;
2330 default:
2331 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2332 }
2333
2334 return name;
2335 }
2336
2337
2338 /* Match an IO iteration statement of the form:
2339
2340 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2341
2342 which is equivalent to a single IO element. This function is
2343 mutually recursive with match_io_element(). */
2344
2345 static match match_io_element (io_kind, gfc_code **);
2346
2347 static match
2348 match_io_iterator (io_kind k, gfc_code **result)
2349 {
2350 gfc_code *head, *tail, *new;
2351 gfc_iterator *iter;
2352 locus old_loc;
2353 match m;
2354 int n;
2355
2356 iter = NULL;
2357 head = NULL;
2358 old_loc = gfc_current_locus;
2359
2360 if (gfc_match_char ('(') != MATCH_YES)
2361 return MATCH_NO;
2362
2363 m = match_io_element (k, &head);
2364 tail = head;
2365
2366 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2367 {
2368 m = MATCH_NO;
2369 goto cleanup;
2370 }
2371
2372 /* Can't be anything but an IO iterator. Build a list. */
2373 iter = gfc_get_iterator ();
2374
2375 for (n = 1;; n++)
2376 {
2377 m = gfc_match_iterator (iter, 0);
2378 if (m == MATCH_ERROR)
2379 goto cleanup;
2380 if (m == MATCH_YES)
2381 {
2382 gfc_check_do_variable (iter->var->symtree);
2383 break;
2384 }
2385
2386 m = match_io_element (k, &new);
2387 if (m == MATCH_ERROR)
2388 goto cleanup;
2389 if (m == MATCH_NO)
2390 {
2391 if (n > 2)
2392 goto syntax;
2393 goto cleanup;
2394 }
2395
2396 tail = gfc_append_code (tail, new);
2397
2398 if (gfc_match_char (',') != MATCH_YES)
2399 {
2400 if (n > 2)
2401 goto syntax;
2402 m = MATCH_NO;
2403 goto cleanup;
2404 }
2405 }
2406
2407 if (gfc_match_char (')') != MATCH_YES)
2408 goto syntax;
2409
2410 new = gfc_get_code ();
2411 new->op = EXEC_DO;
2412 new->ext.iterator = iter;
2413
2414 new->block = gfc_get_code ();
2415 new->block->op = EXEC_DO;
2416 new->block->next = head;
2417
2418 *result = new;
2419 return MATCH_YES;
2420
2421 syntax:
2422 gfc_error ("Syntax error in I/O iterator at %C");
2423 m = MATCH_ERROR;
2424
2425 cleanup:
2426 gfc_free_iterator (iter, 1);
2427 gfc_free_statements (head);
2428 gfc_current_locus = old_loc;
2429 return m;
2430 }
2431
2432
2433 /* Match a single element of an IO list, which is either a single
2434 expression or an IO Iterator. */
2435
2436 static match
2437 match_io_element (io_kind k, gfc_code **cpp)
2438 {
2439 gfc_expr *expr;
2440 gfc_code *cp;
2441 match m;
2442
2443 expr = NULL;
2444
2445 m = match_io_iterator (k, cpp);
2446 if (m == MATCH_YES)
2447 return MATCH_YES;
2448
2449 if (k == M_READ)
2450 {
2451 m = gfc_match_variable (&expr, 0);
2452 if (m == MATCH_NO)
2453 gfc_error ("Expected variable in READ statement at %C");
2454 }
2455 else
2456 {
2457 m = gfc_match_expr (&expr);
2458 if (m == MATCH_NO)
2459 gfc_error ("Expected expression in %s statement at %C",
2460 io_kind_name (k));
2461 }
2462
2463 if (m == MATCH_YES)
2464 switch (k)
2465 {
2466 case M_READ:
2467 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2468 {
2469 gfc_error ("Variable '%s' in input list at %C cannot be "
2470 "INTENT(IN)", expr->symtree->n.sym->name);
2471 m = MATCH_ERROR;
2472 }
2473
2474 if (gfc_pure (NULL)
2475 && gfc_impure_variable (expr->symtree->n.sym)
2476 && current_dt->io_unit->ts.type == BT_CHARACTER)
2477 {
2478 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2479 expr->symtree->n.sym->name);
2480 m = MATCH_ERROR;
2481 }
2482
2483 if (gfc_check_do_variable (expr->symtree))
2484 m = MATCH_ERROR;
2485
2486 break;
2487
2488 case M_WRITE:
2489 if (current_dt->io_unit->ts.type == BT_CHARACTER
2490 && gfc_pure (NULL)
2491 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2492 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2493 {
2494 gfc_error ("Cannot write to internal file unit '%s' at %C "
2495 "inside a PURE procedure",
2496 current_dt->io_unit->symtree->n.sym->name);
2497 m = MATCH_ERROR;
2498 }
2499
2500 break;
2501
2502 default:
2503 break;
2504 }
2505
2506 if (m != MATCH_YES)
2507 {
2508 gfc_free_expr (expr);
2509 return MATCH_ERROR;
2510 }
2511
2512 cp = gfc_get_code ();
2513 cp->op = EXEC_TRANSFER;
2514 cp->expr = expr;
2515
2516 *cpp = cp;
2517 return MATCH_YES;
2518 }
2519
2520
2521 /* Match an I/O list, building gfc_code structures as we go. */
2522
2523 static match
2524 match_io_list (io_kind k, gfc_code **head_p)
2525 {
2526 gfc_code *head, *tail, *new;
2527 match m;
2528
2529 *head_p = head = tail = NULL;
2530 if (gfc_match_eos () == MATCH_YES)
2531 return MATCH_YES;
2532
2533 for (;;)
2534 {
2535 m = match_io_element (k, &new);
2536 if (m == MATCH_ERROR)
2537 goto cleanup;
2538 if (m == MATCH_NO)
2539 goto syntax;
2540
2541 tail = gfc_append_code (tail, new);
2542 if (head == NULL)
2543 head = new;
2544
2545 if (gfc_match_eos () == MATCH_YES)
2546 break;
2547 if (gfc_match_char (',') != MATCH_YES)
2548 goto syntax;
2549 }
2550
2551 *head_p = head;
2552 return MATCH_YES;
2553
2554 syntax:
2555 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2556
2557 cleanup:
2558 gfc_free_statements (head);
2559 return MATCH_ERROR;
2560 }
2561
2562
2563 /* Attach the data transfer end node. */
2564
2565 static void
2566 terminate_io (gfc_code *io_code)
2567 {
2568 gfc_code *c;
2569
2570 if (io_code == NULL)
2571 io_code = new_st.block;
2572
2573 c = gfc_get_code ();
2574 c->op = EXEC_DT_END;
2575
2576 /* Point to structure that is already there */
2577 c->ext.dt = new_st.ext.dt;
2578 gfc_append_code (io_code, c);
2579 }
2580
2581
2582 /* Check the constraints for a data transfer statement. The majority of the
2583 constraints appearing in 9.4 of the standard appear here. Some are handled
2584 in resolve_tag and others in gfc_resolve_dt. */
2585
2586 static match
2587 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2588 locus *spec_end)
2589 {
2590 #define io_constraint(condition,msg,arg)\
2591 if (condition) \
2592 {\
2593 gfc_error(msg,arg);\
2594 m = MATCH_ERROR;\
2595 }
2596
2597 match m;
2598 gfc_expr *expr;
2599 gfc_symbol *sym = NULL;
2600
2601 m = MATCH_YES;
2602
2603 expr = dt->io_unit;
2604 if (expr && expr->expr_type == EXPR_VARIABLE
2605 && expr->ts.type == BT_CHARACTER)
2606 {
2607 sym = expr->symtree->n.sym;
2608
2609 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2610 "Internal file at %L must not be INTENT(IN)",
2611 &expr->where);
2612
2613 io_constraint (gfc_has_vector_index (dt->io_unit),
2614 "Internal file incompatible with vector subscript at %L",
2615 &expr->where);
2616
2617 io_constraint (dt->rec != NULL,
2618 "REC tag at %L is incompatible with internal file",
2619 &dt->rec->where);
2620
2621 if (dt->namelist != NULL)
2622 {
2623 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2624 "at %L with namelist", &expr->where)
2625 == FAILURE)
2626 m = MATCH_ERROR;
2627 }
2628
2629 io_constraint (dt->advance != NULL,
2630 "ADVANCE tag at %L is incompatible with internal file",
2631 &dt->advance->where);
2632 }
2633
2634 if (expr && expr->ts.type != BT_CHARACTER)
2635 {
2636
2637 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2638 "IO UNIT in %s statement at %C must be "
2639 "an internal file in a PURE procedure",
2640 io_kind_name (k));
2641 }
2642
2643
2644 if (k != M_READ)
2645 {
2646 io_constraint (dt->end, "END tag not allowed with output at %L",
2647 &dt->end_where);
2648
2649 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2650 &dt->eor_where);
2651
2652 io_constraint (k != M_READ && dt->size,
2653 "SIZE=specifier not allowed with output at %L",
2654 &dt->size->where);
2655 }
2656 else
2657 {
2658 io_constraint (dt->size && dt->advance == NULL,
2659 "SIZE tag at %L requires an ADVANCE tag",
2660 &dt->size->where);
2661
2662 io_constraint (dt->eor && dt->advance == NULL,
2663 "EOR tag at %L requires an ADVANCE tag",
2664 &dt->eor_where);
2665 }
2666
2667
2668
2669 if (dt->namelist)
2670 {
2671 io_constraint (io_code && dt->namelist,
2672 "NAMELIST cannot be followed by IO-list at %L",
2673 &io_code->loc);
2674
2675 io_constraint (dt->format_expr,
2676 "IO spec-list cannot contain both NAMELIST group name "
2677 "and format specification at %L.",
2678 &dt->format_expr->where);
2679
2680 io_constraint (dt->format_label,
2681 "IO spec-list cannot contain both NAMELIST group name "
2682 "and format label at %L", spec_end);
2683
2684 io_constraint (dt->rec,
2685 "NAMELIST IO is not allowed with a REC=specifier "
2686 "at %L.", &dt->rec->where);
2687
2688 io_constraint (dt->advance,
2689 "NAMELIST IO is not allowed with a ADVANCE=specifier "
2690 "at %L.", &dt->advance->where);
2691 }
2692
2693 if (dt->rec)
2694 {
2695 io_constraint (dt->end,
2696 "An END tag is not allowed with a "
2697 "REC=specifier at %L.", &dt->end_where);
2698
2699
2700 io_constraint (dt->format_label == &format_asterisk,
2701 "FMT=* is not allowed with a REC=specifier "
2702 "at %L.", spec_end);
2703 }
2704
2705 if (dt->advance)
2706 {
2707 int not_yes, not_no;
2708 expr = dt->advance;
2709
2710 io_constraint (dt->format_label == &format_asterisk,
2711 "List directed format(*) is not allowed with a "
2712 "ADVANCE=specifier at %L.", &expr->where);
2713
2714 io_constraint (dt->format_expr == NULL && dt->format_label == NULL
2715 && dt->namelist == NULL,
2716 "the ADVANCE=specifier at %L must appear with an "
2717 "explicit format expression", &expr->where);
2718
2719 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
2720 {
2721 const char * advance = expr->value.character.string;
2722 not_no = strcasecmp (advance, "no") != 0;
2723 not_yes = strcasecmp (advance, "yes") != 0;
2724 }
2725 else
2726 {
2727 not_no = 0;
2728 not_yes = 0;
2729 }
2730
2731 io_constraint (not_no && not_yes,
2732 "ADVANCE=specifier at %L must have value = "
2733 "YES or NO.", &expr->where);
2734
2735 io_constraint (dt->size && not_no && k == M_READ,
2736 "SIZE tag at %L requires an ADVANCE = 'NO'",
2737 &dt->size->where);
2738
2739 io_constraint (dt->eor && not_no && k == M_READ,
2740 "EOR tag at %L requires an ADVANCE = 'NO'",
2741 &dt->eor_where);
2742 }
2743
2744 expr = dt->format_expr;
2745 if (expr != NULL && expr->expr_type == EXPR_CONSTANT
2746 && check_format_string (expr, k == M_READ) == FAILURE)
2747 return MATCH_ERROR;
2748
2749 return m;
2750 }
2751 #undef io_constraint
2752
2753
2754 /* Match a READ, WRITE or PRINT statement. */
2755
2756 static match
2757 match_io (io_kind k)
2758 {
2759 char name[GFC_MAX_SYMBOL_LEN + 1];
2760 gfc_code *io_code;
2761 gfc_symbol *sym;
2762 int comma_flag, c;
2763 locus where;
2764 locus spec_end;
2765 gfc_dt *dt;
2766 match m;
2767
2768 where = gfc_current_locus;
2769 comma_flag = 0;
2770 current_dt = dt = gfc_getmem (sizeof (gfc_dt));
2771 m = gfc_match_char ('(');
2772 if (m == MATCH_NO)
2773 {
2774 where = gfc_current_locus;
2775 if (k == M_WRITE)
2776 goto syntax;
2777 else if (k == M_PRINT)
2778 {
2779 /* Treat the non-standard case of PRINT namelist. */
2780 if ((gfc_current_form == FORM_FIXED || gfc_peek_char () == ' ')
2781 && gfc_match_name (name) == MATCH_YES)
2782 {
2783 gfc_find_symbol (name, NULL, 1, &sym);
2784 if (sym && sym->attr.flavor == FL_NAMELIST)
2785 {
2786 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
2787 "%C is an extension") == FAILURE)
2788 {
2789 m = MATCH_ERROR;
2790 goto cleanup;
2791 }
2792
2793 dt->io_unit = default_unit (k);
2794 dt->namelist = sym;
2795 goto get_io_list;
2796 }
2797 else
2798 gfc_current_locus = where;
2799 }
2800 }
2801
2802 if (gfc_current_form == FORM_FREE)
2803 {
2804 c = gfc_peek_char();
2805 if (c != ' ' && c != '*' && c != '\'' && c != '"')
2806 {
2807 m = MATCH_NO;
2808 goto cleanup;
2809 }
2810 }
2811
2812 m = match_dt_format (dt);
2813 if (m == MATCH_ERROR)
2814 goto cleanup;
2815 if (m == MATCH_NO)
2816 goto syntax;
2817
2818 comma_flag = 1;
2819 dt->io_unit = default_unit (k);
2820 goto get_io_list;
2821 }
2822 else
2823 {
2824 /* Before issuing an error for a malformed 'print (1,*)' type of
2825 error, check for a default-char-expr of the form ('(I0)'). */
2826 if (k == M_PRINT && m == MATCH_YES)
2827 {
2828 /* Reset current locus to get the initial '(' in an expression. */
2829 gfc_current_locus = where;
2830 dt->format_expr = NULL;
2831 m = match_dt_format (dt);
2832
2833 if (m == MATCH_ERROR)
2834 goto cleanup;
2835 if (m == MATCH_NO || dt->format_expr == NULL)
2836 goto syntax;
2837
2838 comma_flag = 1;
2839 dt->io_unit = default_unit (k);
2840 goto get_io_list;
2841 }
2842 }
2843
2844 /* Match a control list */
2845 if (match_dt_element (k, dt) == MATCH_YES)
2846 goto next;
2847 if (match_dt_unit (k, dt) != MATCH_YES)
2848 goto loop;
2849
2850 if (gfc_match_char (')') == MATCH_YES)
2851 goto get_io_list;
2852 if (gfc_match_char (',') != MATCH_YES)
2853 goto syntax;
2854
2855 m = match_dt_element (k, dt);
2856 if (m == MATCH_YES)
2857 goto next;
2858 if (m == MATCH_ERROR)
2859 goto cleanup;
2860
2861 m = match_dt_format (dt);
2862 if (m == MATCH_YES)
2863 goto next;
2864 if (m == MATCH_ERROR)
2865 goto cleanup;
2866
2867 where = gfc_current_locus;
2868
2869 m = gfc_match_name (name);
2870 if (m == MATCH_YES)
2871 {
2872 gfc_find_symbol (name, NULL, 1, &sym);
2873 if (sym && sym->attr.flavor == FL_NAMELIST)
2874 {
2875 dt->namelist = sym;
2876 if (k == M_READ && check_namelist (sym))
2877 {
2878 m = MATCH_ERROR;
2879 goto cleanup;
2880 }
2881 goto next;
2882 }
2883 }
2884
2885 gfc_current_locus = where;
2886
2887 goto loop; /* No matches, try regular elements */
2888
2889 next:
2890 if (gfc_match_char (')') == MATCH_YES)
2891 goto get_io_list;
2892 if (gfc_match_char (',') != MATCH_YES)
2893 goto syntax;
2894
2895 loop:
2896 for (;;)
2897 {
2898 m = match_dt_element (k, dt);
2899 if (m == MATCH_NO)
2900 goto syntax;
2901 if (m == MATCH_ERROR)
2902 goto cleanup;
2903
2904 if (gfc_match_char (')') == MATCH_YES)
2905 break;
2906 if (gfc_match_char (',') != MATCH_YES)
2907 goto syntax;
2908 }
2909
2910 get_io_list:
2911
2912 /* Used in check_io_constraints, where no locus is available. */
2913 spec_end = gfc_current_locus;
2914
2915 /* Optional leading comma (non-standard). */
2916 if (!comma_flag
2917 && gfc_match_char (',') == MATCH_YES
2918 && k == M_WRITE
2919 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before output "
2920 "item list at %C is an extension") == FAILURE)
2921 return MATCH_ERROR;
2922
2923 io_code = NULL;
2924 if (gfc_match_eos () != MATCH_YES)
2925 {
2926 if (comma_flag && gfc_match_char (',') != MATCH_YES)
2927 {
2928 gfc_error ("Expected comma in I/O list at %C");
2929 m = MATCH_ERROR;
2930 goto cleanup;
2931 }
2932
2933 m = match_io_list (k, &io_code);
2934 if (m == MATCH_ERROR)
2935 goto cleanup;
2936 if (m == MATCH_NO)
2937 goto syntax;
2938 }
2939
2940 /* A full IO statement has been matched. Check the constraints. spec_end is
2941 supplied for cases where no locus is supplied. */
2942 m = check_io_constraints (k, dt, io_code, &spec_end);
2943
2944 if (m == MATCH_ERROR)
2945 goto cleanup;
2946
2947 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
2948 new_st.ext.dt = dt;
2949 new_st.block = gfc_get_code ();
2950 new_st.block->op = new_st.op;
2951 new_st.block->next = io_code;
2952
2953 terminate_io (io_code);
2954
2955 return MATCH_YES;
2956
2957 syntax:
2958 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2959 m = MATCH_ERROR;
2960
2961 cleanup:
2962 gfc_free_dt (dt);
2963 return m;
2964 }
2965
2966
2967 match
2968 gfc_match_read (void)
2969 {
2970 return match_io (M_READ);
2971 }
2972
2973 match
2974 gfc_match_write (void)
2975 {
2976 return match_io (M_WRITE);
2977 }
2978
2979 match
2980 gfc_match_print (void)
2981 {
2982 match m;
2983
2984 m = match_io (M_PRINT);
2985 if (m != MATCH_YES)
2986 return m;
2987
2988 if (gfc_pure (NULL))
2989 {
2990 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
2991 return MATCH_ERROR;
2992 }
2993
2994 return MATCH_YES;
2995 }
2996
2997
2998 /* Free a gfc_inquire structure. */
2999
3000 void
3001 gfc_free_inquire (gfc_inquire *inquire)
3002 {
3003
3004 if (inquire == NULL)
3005 return;
3006
3007 gfc_free_expr (inquire->unit);
3008 gfc_free_expr (inquire->file);
3009 gfc_free_expr (inquire->iomsg);
3010 gfc_free_expr (inquire->iostat);
3011 gfc_free_expr (inquire->exist);
3012 gfc_free_expr (inquire->opened);
3013 gfc_free_expr (inquire->number);
3014 gfc_free_expr (inquire->named);
3015 gfc_free_expr (inquire->name);
3016 gfc_free_expr (inquire->access);
3017 gfc_free_expr (inquire->sequential);
3018 gfc_free_expr (inquire->direct);
3019 gfc_free_expr (inquire->form);
3020 gfc_free_expr (inquire->formatted);
3021 gfc_free_expr (inquire->unformatted);
3022 gfc_free_expr (inquire->recl);
3023 gfc_free_expr (inquire->nextrec);
3024 gfc_free_expr (inquire->blank);
3025 gfc_free_expr (inquire->position);
3026 gfc_free_expr (inquire->action);
3027 gfc_free_expr (inquire->read);
3028 gfc_free_expr (inquire->write);
3029 gfc_free_expr (inquire->readwrite);
3030 gfc_free_expr (inquire->delim);
3031 gfc_free_expr (inquire->pad);
3032 gfc_free_expr (inquire->iolength);
3033 gfc_free_expr (inquire->convert);
3034 gfc_free_expr (inquire->strm_pos);
3035 gfc_free (inquire);
3036 }
3037
3038
3039 /* Match an element of an INQUIRE statement. */
3040
3041 #define RETM if (m != MATCH_NO) return m;
3042
3043 static match
3044 match_inquire_element (gfc_inquire *inquire)
3045 {
3046 match m;
3047
3048 m = match_etag (&tag_unit, &inquire->unit);
3049 RETM m = match_etag (&tag_file, &inquire->file);
3050 RETM m = match_ltag (&tag_err, &inquire->err);
3051 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3052 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3053 RETM m = match_vtag (&tag_exist, &inquire->exist);
3054 RETM m = match_vtag (&tag_opened, &inquire->opened);
3055 RETM m = match_vtag (&tag_named, &inquire->named);
3056 RETM m = match_vtag (&tag_name, &inquire->name);
3057 RETM m = match_out_tag (&tag_number, &inquire->number);
3058 RETM m = match_vtag (&tag_s_access, &inquire->access);
3059 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3060 RETM m = match_vtag (&tag_direct, &inquire->direct);
3061 RETM m = match_vtag (&tag_s_form, &inquire->form);
3062 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3063 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3064 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3065 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3066 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3067 RETM m = match_vtag (&tag_s_position, &inquire->position);
3068 RETM m = match_vtag (&tag_s_action, &inquire->action);
3069 RETM m = match_vtag (&tag_read, &inquire->read);
3070 RETM m = match_vtag (&tag_write, &inquire->write);
3071 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3072 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3073 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3074 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3075 RETM m = match_vtag (&tag_convert, &inquire->convert);
3076 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3077 RETM return MATCH_NO;
3078 }
3079
3080 #undef RETM
3081
3082
3083 match
3084 gfc_match_inquire (void)
3085 {
3086 gfc_inquire *inquire;
3087 gfc_code *code;
3088 match m;
3089 locus loc;
3090
3091 m = gfc_match_char ('(');
3092 if (m == MATCH_NO)
3093 return m;
3094
3095 inquire = gfc_getmem (sizeof (gfc_inquire));
3096
3097 loc = gfc_current_locus;
3098
3099 m = match_inquire_element (inquire);
3100 if (m == MATCH_ERROR)
3101 goto cleanup;
3102 if (m == MATCH_NO)
3103 {
3104 m = gfc_match_expr (&inquire->unit);
3105 if (m == MATCH_ERROR)
3106 goto cleanup;
3107 if (m == MATCH_NO)
3108 goto syntax;
3109 }
3110
3111 /* See if we have the IOLENGTH form of the inquire statement. */
3112 if (inquire->iolength != NULL)
3113 {
3114 if (gfc_match_char (')') != MATCH_YES)
3115 goto syntax;
3116
3117 m = match_io_list (M_INQUIRE, &code);
3118 if (m == MATCH_ERROR)
3119 goto cleanup;
3120 if (m == MATCH_NO)
3121 goto syntax;
3122
3123 new_st.op = EXEC_IOLENGTH;
3124 new_st.expr = inquire->iolength;
3125 new_st.ext.inquire = inquire;
3126
3127 if (gfc_pure (NULL))
3128 {
3129 gfc_free_statements (code);
3130 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3131 return MATCH_ERROR;
3132 }
3133
3134 new_st.block = gfc_get_code ();
3135 new_st.block->op = EXEC_IOLENGTH;
3136 terminate_io (code);
3137 new_st.block->next = code;
3138 return MATCH_YES;
3139 }
3140
3141 /* At this point, we have the non-IOLENGTH inquire statement. */
3142 for (;;)
3143 {
3144 if (gfc_match_char (')') == MATCH_YES)
3145 break;
3146 if (gfc_match_char (',') != MATCH_YES)
3147 goto syntax;
3148
3149 m = match_inquire_element (inquire);
3150 if (m == MATCH_ERROR)
3151 goto cleanup;
3152 if (m == MATCH_NO)
3153 goto syntax;
3154
3155 if (inquire->iolength != NULL)
3156 {
3157 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3158 goto cleanup;
3159 }
3160 }
3161
3162 if (gfc_match_eos () != MATCH_YES)
3163 goto syntax;
3164
3165 if (inquire->unit != NULL && inquire->file != NULL)
3166 {
3167 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3168 "UNIT specifiers", &loc);
3169 goto cleanup;
3170 }
3171
3172 if (inquire->unit == NULL && inquire->file == NULL)
3173 {
3174 gfc_error ("INQUIRE statement at %L requires either FILE or "
3175 "UNIT specifier", &loc);
3176 goto cleanup;
3177 }
3178
3179 if (gfc_pure (NULL))
3180 {
3181 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3182 goto cleanup;
3183 }
3184
3185 new_st.op = EXEC_INQUIRE;
3186 new_st.ext.inquire = inquire;
3187 return MATCH_YES;
3188
3189 syntax:
3190 gfc_syntax_error (ST_INQUIRE);
3191
3192 cleanup:
3193 gfc_free_inquire (inquire);
3194 return MATCH_ERROR;
3195 }
3196
3197
3198 /* Resolve everything in a gfc_inquire structure. */
3199
3200 try
3201 gfc_resolve_inquire (gfc_inquire *inquire)
3202 {
3203 RESOLVE_TAG (&tag_unit, inquire->unit);
3204 RESOLVE_TAG (&tag_file, inquire->file);
3205 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3206 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3207 RESOLVE_TAG (&tag_exist, inquire->exist);
3208 RESOLVE_TAG (&tag_opened, inquire->opened);
3209 RESOLVE_TAG (&tag_number, inquire->number);
3210 RESOLVE_TAG (&tag_named, inquire->named);
3211 RESOLVE_TAG (&tag_name, inquire->name);
3212 RESOLVE_TAG (&tag_s_access, inquire->access);
3213 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3214 RESOLVE_TAG (&tag_direct, inquire->direct);
3215 RESOLVE_TAG (&tag_s_form, inquire->form);
3216 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3217 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3218 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3219 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3220 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3221 RESOLVE_TAG (&tag_s_position, inquire->position);
3222 RESOLVE_TAG (&tag_s_action, inquire->action);
3223 RESOLVE_TAG (&tag_read, inquire->read);
3224 RESOLVE_TAG (&tag_write, inquire->write);
3225 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3226 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3227 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3228 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3229 RESOLVE_TAG (&tag_convert, inquire->convert);
3230 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3231
3232 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3233 return FAILURE;
3234
3235 return SUCCESS;
3236 }
Mirror of https://gcc.gnu.org/git/gcc.git