1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
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 3, or (at your option) any later
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
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
35 const char *name, *spec, *value;
41 tag_file = { "FILE", " file =", " %e", BT_CHARACTER },
42 tag_status = { "STATUS", " status =", " %e", BT_CHARACTER},
43 tag_e_access = {"ACCESS", " access =", " %e", BT_CHARACTER},
44 tag_e_form = {"FORM", " form =", " %e", BT_CHARACTER},
45 tag_e_recl = {"RECL", " recl =", " %e", BT_INTEGER},
46 tag_e_blank = {"BLANK", " blank =", " %e", BT_CHARACTER},
47 tag_e_position = {"POSITION", " position =", " %e", BT_CHARACTER},
48 tag_e_action = {"ACTION", " action =", " %e", BT_CHARACTER},
49 tag_e_delim = {"DELIM", " delim =", " %e", BT_CHARACTER},
50 tag_e_pad = {"PAD", " pad =", " %e", BT_CHARACTER},
51 tag_e_decimal = {"DECIMAL", " decimal =", " %e", BT_CHARACTER},
52 tag_e_encoding = {"ENCODING", " encoding =", " %e", BT_CHARACTER},
53 tag_e_async = {"ASYNCHRONOUS", " asynchronous =", " %e", BT_CHARACTER},
54 tag_e_round = {"ROUND", " round =", " %e", BT_CHARACTER},
55 tag_e_sign = {"SIGN", " sign =", " %e", BT_CHARACTER},
56 tag_unit = {"UNIT", " unit =", " %e", BT_INTEGER},
57 tag_advance = {"ADVANCE", " advance =", " %e", BT_CHARACTER},
58 tag_rec = {"REC", " rec =", " %e", BT_INTEGER},
59 tag_spos = {"POSITION", " pos =", " %e", BT_INTEGER},
60 tag_format = {"FORMAT", NULL, NULL, BT_CHARACTER},
61 tag_iomsg = {"IOMSG", " iomsg =", " %e", BT_CHARACTER},
62 tag_iostat = {"IOSTAT", " iostat =", " %v", BT_INTEGER},
63 tag_size = {"SIZE", " size =", " %v", BT_INTEGER},
64 tag_exist = {"EXIST", " exist =", " %v", BT_LOGICAL},
65 tag_opened = {"OPENED", " opened =", " %v", BT_LOGICAL},
66 tag_named = {"NAMED", " named =", " %v", BT_LOGICAL},
67 tag_name = {"NAME", " name =", " %v", BT_CHARACTER},
68 tag_number = {"NUMBER", " number =", " %v", BT_INTEGER},
69 tag_s_access = {"ACCESS", " access =", " %v", BT_CHARACTER},
70 tag_sequential = {"SEQUENTIAL", " sequential =", " %v", BT_CHARACTER},
71 tag_direct = {"DIRECT", " direct =", " %v", BT_CHARACTER},
72 tag_s_form = {"FORM", " form =", " %v", BT_CHARACTER},
73 tag_formatted = {"FORMATTED", " formatted =", " %v", BT_CHARACTER},
74 tag_unformatted = {"UNFORMATTED", " unformatted =", " %v", BT_CHARACTER},
75 tag_s_recl = {"RECL", " recl =", " %v", BT_INTEGER},
76 tag_nextrec = {"NEXTREC", " nextrec =", " %v", BT_INTEGER},
77 tag_s_blank = {"BLANK", " blank =", " %v", BT_CHARACTER},
78 tag_s_position = {"POSITION", " position =", " %v", BT_CHARACTER},
79 tag_s_action = {"ACTION", " action =", " %v", BT_CHARACTER},
80 tag_read = {"READ", " read =", " %v", BT_CHARACTER},
81 tag_write = {"WRITE", " write =", " %v", BT_CHARACTER},
82 tag_readwrite = {"READWRITE", " readwrite =", " %v", BT_CHARACTER},
83 tag_s_delim = {"DELIM", " delim =", " %v", BT_CHARACTER},
84 tag_s_pad = {"PAD", " pad =", " %v", BT_CHARACTER},
85 tag_s_decimal = {"DECIMAL", " decimal =", " %v", BT_CHARACTER},
86 tag_s_encoding = {"ENCODING", " encoding =", " %v", BT_CHARACTER},
87 tag_s_async = {"ASYNCHRONOUS", " asynchronous =", " %v", BT_CHARACTER},
88 tag_s_round = {"ROUND", " round =", " %v", BT_CHARACTER},
89 tag_s_sign = {"SIGN", " sign =", " %v", BT_CHARACTER},
90 tag_iolength = {"IOLENGTH", " iolength =", " %v", BT_INTEGER},
91 tag_convert = {"CONVERT", " convert =", " %e", BT_CHARACTER},
92 tag_strm_out = {"POS", " pos =", " %v", BT_INTEGER},
93 tag_err = {"ERR", " err =", " %l", BT_UNKNOWN},
94 tag_end = {"END", " end =", " %l", BT_UNKNOWN},
95 tag_eor = {"EOR", " eor =", " %l", BT_UNKNOWN},
96 tag_id = {"ID", " id =", " %v", BT_INTEGER},
97 tag_pending = {"PENDING", " pending =", " %v", BT_LOGICAL};
99 static gfc_dt *current_dt;
101 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
104 /**************** Fortran 95 FORMAT parser *****************/
106 /* FORMAT tokens returned by format_lex(). */
109 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
110 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN,
111 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
112 FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END, FMT_ERROR, FMT_DC,
117 /* Local variables for checking format strings. The saved_token is
118 used to back up by a single format token during the parsing
120 static gfc_char_t *format_string;
121 static int format_length, use_last_char;
122 static char error_element;
123 static locus format_locus;
125 static format_token saved_token;
128 { MODE_STRING, MODE_FORMAT, MODE_COPY }
132 /* Return the next character in the format string. */
135 next_char (int in_string)
147 if (mode == MODE_STRING)
148 c = *format_string++;
151 c = gfc_next_char_literal (in_string);
156 if (gfc_option.flag_backslash && c == '\\')
158 locus old_locus = gfc_current_locus;
160 if (gfc_match_special_char (&c) == MATCH_NO)
161 gfc_current_locus = old_locus;
163 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
164 gfc_warning ("Extension: backslash character at %C");
167 if (mode == MODE_COPY)
168 *format_string++ = c;
170 if (mode != MODE_STRING)
171 format_locus = gfc_current_locus;
173 c = gfc_wide_toupper (c);
178 /* Back up one character position. Only works once. */
186 /* Eat up the spaces and return a character. */
189 next_char_not_space (bool *error)
194 error_element = c = next_char (0);
197 if (gfc_option.allow_std & GFC_STD_GNU)
198 gfc_warning ("Extension: Tab character in format at %C");
201 gfc_error ("Extension: Tab character in format at %C");
207 while (gfc_is_whitespace (c));
211 static int value = 0;
213 /* Simple lexical analyzer for getting the next token in a FORMAT
225 if (saved_token != FMT_NONE)
228 saved_token = FMT_NONE;
232 c = next_char_not_space (&error);
240 c = next_char_not_space (&error);
251 c = next_char_not_space (&error);
253 value = 10 * value + c - '0';
262 token = FMT_SIGNED_INT;
281 c = next_char_not_space (&error);
284 value = 10 * value + c - '0';
292 token = zflag ? FMT_ZERO : FMT_POSINT;
316 c = next_char_not_space (&error);
317 if (c != 'L' && c != 'R')
336 c = next_char_not_space (&error);
337 if (c != 'P' && c != 'S')
344 c = next_char_not_space (&error);
345 if (c == 'N' || c == 'Z')
406 c = next_char_not_space (&error);
407 if (c == 'N' || c == 'S')
434 c = next_char_not_space (&error);
437 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
438 "specifier not allowed at %C") == FAILURE)
444 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
445 "specifier not allowed at %C") == FAILURE)
472 /* Check a format statement. The format string, either from a FORMAT
473 statement or a constant in an I/O statement has already been parsed
474 by itself, and we are checking it for validity. The dual origin
475 means that the warning message is a little less than great. */
478 check_format (bool is_input)
480 const char *posint_required = _("Positive width required");
481 const char *nonneg_required = _("Nonnegative width required");
482 const char *unexpected_element = _("Unexpected element '%c' in format string"
484 const char *unexpected_end = _("Unexpected end of format string");
485 const char *zero_width = _("Zero width in format descriptor");
486 const char *g0_precision = _("Specifying precision with G0 not allowed");
495 saved_token = FMT_NONE;
505 error = _("Missing leading left parenthesis");
513 goto finished; /* Empty format is legal */
517 /* In this state, the next thing has to be a format item. */
546 /* Signed integer can only precede a P format. */
552 error = _("Expected P edit descriptor");
559 /* P requires a prior number. */
560 error = _("P descriptor requires leading scale factor");
564 /* X requires a prior number if we're being pedantic. */
565 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
566 "requires leading space count at %C")
578 goto extension_optional_comma;
589 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
592 if (t != FMT_RPAREN || level > 0)
594 gfc_warning ("$ should be the last specifier in format at %C");
595 goto optional_comma_1;
613 error = unexpected_end;
617 error = unexpected_element;
622 /* In this state, t must currently be a data descriptor.
623 Deal with things that can/must follow the descriptor. */
641 error = _("Repeat count cannot follow P descriptor");
658 switch (gfc_notification_std (GFC_STD_GNU))
661 gfc_warning ("Extension: Missing positive width after L "
667 error = posint_required;
697 if (t == FMT_G && u == FMT_ZERO)
705 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
706 "format at %C") == FAILURE)
712 error = g0_precision;
723 error = posint_required;
732 /* Warn if -std=legacy, otherwise error. */
733 if (gfc_option.warn_std != 0)
734 gfc_error_now ("Period required in format specifier at %C");
736 gfc_warning ("Period required in format specifier at %C");
744 if (u != FMT_ZERO && u != FMT_POSINT)
746 error = nonneg_required;
753 /* Look for optional exponent. */
768 error = _("Positive exponent width required");
779 if (t != FMT_ZERO && t != FMT_POSINT)
781 error = nonneg_required;
784 else if (is_input && t == FMT_ZERO)
786 error = posint_required;
795 /* Warn if -std=legacy, otherwise error. */
796 if (gfc_option.warn_std != 0)
797 gfc_error_now ("Period required in format specifier at %C");
799 gfc_warning ("Period required in format specifier at %C");
807 if (t != FMT_ZERO && t != FMT_POSINT)
809 error = nonneg_required;
816 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
817 gfc_warning ("The H format specifier at %C is"
818 " a Fortran 95 deleted feature");
820 if (mode == MODE_STRING)
822 format_string += value;
823 format_length -= value;
839 if (t != FMT_ZERO && t != FMT_POSINT)
841 error = nonneg_required;
844 else if (is_input && t == FMT_ZERO)
846 error = posint_required;
862 if (t != FMT_ZERO && t != FMT_POSINT)
864 error = nonneg_required;
872 error = unexpected_element;
877 /* Between a descriptor and what comes next. */
898 error = unexpected_end;
902 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
909 /* Optional comma is a weird between state where we've just finished
910 reading a colon, slash, dollar or P descriptor. */
927 /* Assume that we have another format item. */
934 extension_optional_comma:
935 /* As a GNU extension, permit a missing comma after a string literal. */
955 error = unexpected_end;
959 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
969 if (error == unexpected_element)
970 gfc_error (error, error_element, &format_locus);
972 gfc_error ("%s in format string at %L", error, &format_locus);
981 /* Given an expression node that is a constant string, see if it looks
982 like a format string. */
985 check_format_string (gfc_expr *e, bool is_input)
987 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
991 format_string = e->value.character.string;
993 /* More elaborate measures are needed to show where a problem is within a
994 format string that has been calculated, but that's probably not worth the
996 format_locus = e->where;
998 return check_format (is_input);
1002 /************ Fortran 95 I/O statement matchers *************/
1004 /* Match a FORMAT statement. This amounts to actually parsing the
1005 format descriptors in order to correctly locate the end of the
1009 gfc_match_format (void)
1014 if (gfc_current_ns->proc_name
1015 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1017 gfc_error ("Format statement in module main block at %C");
1021 if (gfc_statement_label == NULL)
1023 gfc_error ("Missing format label at %C");
1026 gfc_gobble_whitespace ();
1031 start = gfc_current_locus;
1033 if (check_format (false) == FAILURE)
1036 if (gfc_match_eos () != MATCH_YES)
1038 gfc_syntax_error (ST_FORMAT);
1042 /* The label doesn't get created until after the statement is done
1043 being matched, so we have to leave the string for later. */
1045 gfc_current_locus = start; /* Back to the beginning */
1048 new_st.op = EXEC_NOP;
1051 e->expr_type = EXPR_CONSTANT;
1052 e->ts.type = BT_CHARACTER;
1053 e->ts.kind = gfc_default_character_kind;
1055 e->value.character.string = format_string
1056 = gfc_get_wide_string (format_length + 1);
1057 e->value.character.length = format_length;
1058 gfc_statement_label->format = e;
1061 check_format (false); /* Guaranteed to succeed */
1062 gfc_match_eos (); /* Guaranteed to succeed */
1068 /* Match an expression I/O tag of some sort. */
1071 match_etag (const io_tag *tag, gfc_expr **v)
1076 m = gfc_match (tag->spec);
1080 m = gfc_match (tag->value, &result);
1083 gfc_error ("Invalid value for %s specification at %C", tag->name);
1089 gfc_error ("Duplicate %s specification at %C", tag->name);
1090 gfc_free_expr (result);
1099 /* Match a variable I/O tag of some sort. */
1102 match_vtag (const io_tag *tag, gfc_expr **v)
1107 m = gfc_match (tag->spec);
1111 m = gfc_match (tag->value, &result);
1114 gfc_error ("Invalid value for %s specification at %C", tag->name);
1120 gfc_error ("Duplicate %s specification at %C", tag->name);
1121 gfc_free_expr (result);
1125 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1127 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
1128 gfc_free_expr (result);
1132 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1134 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
1135 gfc_free_expr (result);
1144 /* Match I/O tags that cause variables to become redefined. */
1147 match_out_tag(const io_tag *tag, gfc_expr **result)
1151 m = match_vtag(tag, result);
1153 gfc_check_do_variable((*result)->symtree);
1159 /* Match a label I/O tag. */
1162 match_ltag (const io_tag *tag, gfc_st_label ** label)
1168 m = gfc_match (tag->spec);
1172 m = gfc_match (tag->value, label);
1175 gfc_error ("Invalid value for %s specification at %C", tag->name);
1181 gfc_error ("Duplicate %s label specification at %C", tag->name);
1185 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1192 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1195 resolve_tag_format (const gfc_expr *e)
1197 if (e->expr_type == EXPR_CONSTANT
1198 && (e->ts.type != BT_CHARACTER
1199 || e->ts.kind != gfc_default_character_kind))
1201 gfc_error ("Constant expression in FORMAT tag at %L must be "
1202 "of type default CHARACTER", &e->where);
1206 /* If e's rank is zero and e is not an element of an array, it should be
1207 of integer or character type. The integer variable should be
1209 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1210 || e->symtree->n.sym->as->rank == 0)
1212 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1214 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1218 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1220 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1221 "variable in FORMAT tag at %L", &e->where)
1224 if (e->symtree->n.sym->attr.assign != 1)
1226 gfc_error ("Variable '%s' at %L has not been assigned a "
1227 "format label", e->symtree->n.sym->name, &e->where);
1231 else if (e->ts.type == BT_INTEGER)
1233 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1234 "variable", gfc_basic_typename (e->ts.type), &e->where);
1241 /* If rank is nonzero, we allow the type to be character under GFC_STD_GNU
1242 and other type under GFC_STD_LEGACY. It may be assigned an Hollerith
1244 if (e->ts.type == BT_CHARACTER)
1246 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1247 "in FORMAT tag at %L", &e->where) == FAILURE)
1252 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1253 "in FORMAT tag at %L", &e->where) == FAILURE)
1261 /* Do expression resolution and type-checking on an expression tag. */
1264 resolve_tag (const io_tag *tag, gfc_expr *e)
1269 if (gfc_resolve_expr (e) == FAILURE)
1272 if (tag == &tag_format)
1273 return resolve_tag_format (e);
1275 if (e->ts.type != tag->type)
1277 gfc_error ("%s tag at %L must be of type %s", tag->name,
1278 &e->where, gfc_basic_typename (tag->type));
1284 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1288 if (tag == &tag_iomsg)
1290 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1291 &e->where) == FAILURE)
1295 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1296 && e->ts.kind != gfc_default_integer_kind)
1298 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1299 "INTEGER in %s tag at %L", tag->name, &e->where)
1304 if (tag == &tag_convert)
1306 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1307 &e->where) == FAILURE)
1315 /* Match a single tag of an OPEN statement. */
1318 match_open_element (gfc_open *open)
1322 m = match_etag (&tag_e_async, &open->asynchronous);
1325 m = match_etag (&tag_unit, &open->unit);
1328 m = match_out_tag (&tag_iomsg, &open->iomsg);
1331 m = match_out_tag (&tag_iostat, &open->iostat);
1334 m = match_etag (&tag_file, &open->file);
1337 m = match_etag (&tag_status, &open->status);
1340 m = match_etag (&tag_e_access, &open->access);
1343 m = match_etag (&tag_e_form, &open->form);
1346 m = match_etag (&tag_e_recl, &open->recl);
1349 m = match_etag (&tag_e_blank, &open->blank);
1352 m = match_etag (&tag_e_position, &open->position);
1355 m = match_etag (&tag_e_action, &open->action);
1358 m = match_etag (&tag_e_delim, &open->delim);
1361 m = match_etag (&tag_e_pad, &open->pad);
1364 m = match_etag (&tag_e_decimal, &open->decimal);
1367 m = match_etag (&tag_e_encoding, &open->encoding);
1370 m = match_etag (&tag_e_round, &open->round);
1373 m = match_etag (&tag_e_sign, &open->sign);
1376 m = match_ltag (&tag_err, &open->err);
1379 m = match_etag (&tag_convert, &open->convert);
1387 /* Free the gfc_open structure and all the expressions it contains. */
1390 gfc_free_open (gfc_open *open)
1395 gfc_free_expr (open->unit);
1396 gfc_free_expr (open->iomsg);
1397 gfc_free_expr (open->iostat);
1398 gfc_free_expr (open->file);
1399 gfc_free_expr (open->status);
1400 gfc_free_expr (open->access);
1401 gfc_free_expr (open->form);
1402 gfc_free_expr (open->recl);
1403 gfc_free_expr (open->blank);
1404 gfc_free_expr (open->position);
1405 gfc_free_expr (open->action);
1406 gfc_free_expr (open->delim);
1407 gfc_free_expr (open->pad);
1408 gfc_free_expr (open->decimal);
1409 gfc_free_expr (open->encoding);
1410 gfc_free_expr (open->round);
1411 gfc_free_expr (open->sign);
1412 gfc_free_expr (open->convert);
1413 gfc_free_expr (open->asynchronous);
1418 /* Resolve everything in a gfc_open structure. */
1421 gfc_resolve_open (gfc_open *open)
1424 RESOLVE_TAG (&tag_unit, open->unit);
1425 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1426 RESOLVE_TAG (&tag_iostat, open->iostat);
1427 RESOLVE_TAG (&tag_file, open->file);
1428 RESOLVE_TAG (&tag_status, open->status);
1429 RESOLVE_TAG (&tag_e_access, open->access);
1430 RESOLVE_TAG (&tag_e_form, open->form);
1431 RESOLVE_TAG (&tag_e_recl, open->recl);
1432 RESOLVE_TAG (&tag_e_blank, open->blank);
1433 RESOLVE_TAG (&tag_e_position, open->position);
1434 RESOLVE_TAG (&tag_e_action, open->action);
1435 RESOLVE_TAG (&tag_e_delim, open->delim);
1436 RESOLVE_TAG (&tag_e_pad, open->pad);
1437 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1438 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1439 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1440 RESOLVE_TAG (&tag_e_round, open->round);
1441 RESOLVE_TAG (&tag_e_sign, open->sign);
1442 RESOLVE_TAG (&tag_convert, open->convert);
1444 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1451 /* Check if a given value for a SPECIFIER is either in the list of values
1452 allowed in F95 or F2003, issuing an error message and returning a zero
1453 value if it is not allowed. */
1456 compare_to_allowed_values (const char *specifier, const char *allowed[],
1457 const char *allowed_f2003[],
1458 const char *allowed_gnu[], gfc_char_t *value,
1459 const char *statement, bool warn)
1464 len = gfc_wide_strlen (value);
1467 for (len--; len > 0; len--)
1468 if (value[len] != ' ')
1473 for (i = 0; allowed[i]; i++)
1474 if (len == strlen (allowed[i])
1475 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1478 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1479 if (len == strlen (allowed_f2003[i])
1480 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1481 strlen (allowed_f2003[i])) == 0)
1483 notification n = gfc_notification_std (GFC_STD_F2003);
1485 if (n == WARNING || (warn && n == ERROR))
1487 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1488 "has value '%s'", specifier, statement,
1495 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1496 "%s statement at %C has value '%s'", specifier,
1497 statement, allowed_f2003[i]);
1505 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1506 if (len == strlen (allowed_gnu[i])
1507 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1508 strlen (allowed_gnu[i])) == 0)
1510 notification n = gfc_notification_std (GFC_STD_GNU);
1512 if (n == WARNING || (warn && n == ERROR))
1514 gfc_warning ("Extension: %s specifier in %s statement at %C "
1515 "has value '%s'", specifier, statement,
1522 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1523 "%s statement at %C has value '%s'", specifier,
1524 statement, allowed_gnu[i]);
1534 char *s = gfc_widechar_to_char (value, -1);
1535 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1536 specifier, statement, s);
1542 char *s = gfc_widechar_to_char (value, -1);
1543 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1544 specifier, statement, s);
1551 /* Match an OPEN statement. */
1554 gfc_match_open (void)
1560 m = gfc_match_char ('(');
1564 open = XCNEW (gfc_open);
1566 m = match_open_element (open);
1568 if (m == MATCH_ERROR)
1572 m = gfc_match_expr (&open->unit);
1575 if (m == MATCH_ERROR)
1581 if (gfc_match_char (')') == MATCH_YES)
1583 if (gfc_match_char (',') != MATCH_YES)
1586 m = match_open_element (open);
1587 if (m == MATCH_ERROR)
1593 if (gfc_match_eos () == MATCH_NO)
1596 if (gfc_pure (NULL))
1598 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1602 warn = (open->err || open->iostat) ? true : false;
1603 /* Checks on the ACCESS specifier. */
1604 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1606 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1607 static const char *access_f2003[] = { "STREAM", NULL };
1608 static const char *access_gnu[] = { "APPEND", NULL };
1610 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1612 open->access->value.character.string,
1617 /* Checks on the ACTION specifier. */
1618 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1620 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1622 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1623 open->action->value.character.string,
1628 /* Checks on the ASYNCHRONOUS specifier. */
1629 if (open->asynchronous)
1631 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1632 "not allowed in Fortran 95") == FAILURE)
1635 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1637 static const char * asynchronous[] = { "YES", "NO", NULL };
1639 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1640 NULL, NULL, open->asynchronous->value.character.string,
1646 /* Checks on the BLANK specifier. */
1649 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1650 "not allowed in Fortran 95") == FAILURE)
1653 if (open->blank->expr_type == EXPR_CONSTANT)
1655 static const char *blank[] = { "ZERO", "NULL", NULL };
1657 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1658 open->blank->value.character.string,
1664 /* Checks on the DECIMAL specifier. */
1667 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1668 "not allowed in Fortran 95") == FAILURE)
1671 if (open->decimal->expr_type == EXPR_CONSTANT)
1673 static const char * decimal[] = { "COMMA", "POINT", NULL };
1675 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1676 open->decimal->value.character.string,
1682 /* Checks on the DELIM specifier. */
1685 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1686 "not allowed in Fortran 95") == FAILURE)
1689 if (open->delim->expr_type == EXPR_CONSTANT)
1691 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1693 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1694 open->delim->value.character.string,
1700 /* Checks on the ENCODING specifier. */
1703 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1704 "not allowed in Fortran 95") == FAILURE)
1707 if (open->encoding->expr_type == EXPR_CONSTANT)
1709 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1711 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1712 open->encoding->value.character.string,
1718 /* Checks on the FORM specifier. */
1719 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1721 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1723 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1724 open->form->value.character.string,
1729 /* Checks on the PAD specifier. */
1730 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1732 static const char *pad[] = { "YES", "NO", NULL };
1734 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1735 open->pad->value.character.string,
1740 /* Checks on the POSITION specifier. */
1741 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1743 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1745 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1746 open->position->value.character.string,
1751 /* Checks on the ROUND specifier. */
1754 /* When implemented, change the following to use gfc_notify_std F2003. */
1755 gfc_error ("Fortran F2003: ROUND= specifier at %C not implemented");
1758 if (open->round->expr_type == EXPR_CONSTANT)
1760 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1761 "COMPATIBLE", "PROCESSOR_DEFINED",
1764 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1765 open->round->value.character.string,
1771 /* Checks on the SIGN specifier. */
1774 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1775 "not allowed in Fortran 95") == FAILURE)
1778 if (open->sign->expr_type == EXPR_CONSTANT)
1780 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1783 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1784 open->sign->value.character.string,
1790 #define warn_or_error(...) \
1793 gfc_warning (__VA_ARGS__); \
1796 gfc_error (__VA_ARGS__); \
1801 /* Checks on the RECL specifier. */
1802 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1803 && open->recl->ts.type == BT_INTEGER
1804 && mpz_sgn (open->recl->value.integer) != 1)
1806 warn_or_error ("RECL in OPEN statement at %C must be positive");
1809 /* Checks on the STATUS specifier. */
1810 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1812 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1813 "REPLACE", "UNKNOWN", NULL };
1815 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1816 open->status->value.character.string,
1820 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1821 the FILE= specifier shall appear. */
1822 if (open->file == NULL
1823 && (gfc_wide_strncasecmp (open->status->value.character.string,
1825 || gfc_wide_strncasecmp (open->status->value.character.string,
1828 char *s = gfc_widechar_to_char (open->status->value.character.string,
1830 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1831 "'%s' and no FILE specifier is present", s);
1835 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1836 the FILE= specifier shall not appear. */
1837 if (gfc_wide_strncasecmp (open->status->value.character.string,
1838 "scratch", 7) == 0 && open->file)
1840 warn_or_error ("The STATUS specified in OPEN statement at %C "
1841 "cannot have the value SCRATCH if a FILE specifier "
1846 /* Things that are not allowed for unformatted I/O. */
1847 if (open->form && open->form->expr_type == EXPR_CONSTANT
1848 && (open->delim || open->decimal || open->encoding || open->round
1849 || open->sign || open->pad || open->blank)
1850 && gfc_wide_strncasecmp (open->form->value.character.string,
1851 "unformatted", 11) == 0)
1853 const char *spec = (open->delim ? "DELIM "
1854 : (open->pad ? "PAD " : open->blank
1857 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1858 "unformatted I/O", spec);
1861 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1862 && gfc_wide_strncasecmp (open->access->value.character.string,
1865 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1870 && open->access && open->access->expr_type == EXPR_CONSTANT
1871 && !(gfc_wide_strncasecmp (open->access->value.character.string,
1872 "sequential", 10) == 0
1873 || gfc_wide_strncasecmp (open->access->value.character.string,
1875 || gfc_wide_strncasecmp (open->access->value.character.string,
1878 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1879 "for stream or sequential ACCESS");
1882 #undef warn_or_error
1884 new_st.op = EXEC_OPEN;
1885 new_st.ext.open = open;
1889 gfc_syntax_error (ST_OPEN);
1892 gfc_free_open (open);
1897 /* Free a gfc_close structure an all its expressions. */
1900 gfc_free_close (gfc_close *close)
1905 gfc_free_expr (close->unit);
1906 gfc_free_expr (close->iomsg);
1907 gfc_free_expr (close->iostat);
1908 gfc_free_expr (close->status);
1913 /* Match elements of a CLOSE statement. */
1916 match_close_element (gfc_close *close)
1920 m = match_etag (&tag_unit, &close->unit);
1923 m = match_etag (&tag_status, &close->status);
1926 m = match_out_tag (&tag_iomsg, &close->iomsg);
1929 m = match_out_tag (&tag_iostat, &close->iostat);
1932 m = match_ltag (&tag_err, &close->err);
1940 /* Match a CLOSE statement. */
1943 gfc_match_close (void)
1949 m = gfc_match_char ('(');
1953 close = XCNEW (gfc_close);
1955 m = match_close_element (close);
1957 if (m == MATCH_ERROR)
1961 m = gfc_match_expr (&close->unit);
1964 if (m == MATCH_ERROR)
1970 if (gfc_match_char (')') == MATCH_YES)
1972 if (gfc_match_char (',') != MATCH_YES)
1975 m = match_close_element (close);
1976 if (m == MATCH_ERROR)
1982 if (gfc_match_eos () == MATCH_NO)
1985 if (gfc_pure (NULL))
1987 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1991 warn = (close->iostat || close->err) ? true : false;
1993 /* Checks on the STATUS specifier. */
1994 if (close->status && close->status->expr_type == EXPR_CONSTANT)
1996 static const char *status[] = { "KEEP", "DELETE", NULL };
1998 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1999 close->status->value.character.string,
2004 new_st.op = EXEC_CLOSE;
2005 new_st.ext.close = close;
2009 gfc_syntax_error (ST_CLOSE);
2012 gfc_free_close (close);
2017 /* Resolve everything in a gfc_close structure. */
2020 gfc_resolve_close (gfc_close *close)
2022 RESOLVE_TAG (&tag_unit, close->unit);
2023 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2024 RESOLVE_TAG (&tag_iostat, close->iostat);
2025 RESOLVE_TAG (&tag_status, close->status);
2027 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2034 /* Free a gfc_filepos structure. */
2037 gfc_free_filepos (gfc_filepos *fp)
2039 gfc_free_expr (fp->unit);
2040 gfc_free_expr (fp->iomsg);
2041 gfc_free_expr (fp->iostat);
2046 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2049 match_file_element (gfc_filepos *fp)
2053 m = match_etag (&tag_unit, &fp->unit);
2056 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2059 m = match_out_tag (&tag_iostat, &fp->iostat);
2062 m = match_ltag (&tag_err, &fp->err);
2070 /* Match the second half of the file-positioning statements, REWIND,
2071 BACKSPACE, ENDFILE, or the FLUSH statement. */
2074 match_filepos (gfc_statement st, gfc_exec_op op)
2079 fp = XCNEW (gfc_filepos);
2081 if (gfc_match_char ('(') == MATCH_NO)
2083 m = gfc_match_expr (&fp->unit);
2084 if (m == MATCH_ERROR)
2092 m = match_file_element (fp);
2093 if (m == MATCH_ERROR)
2097 m = gfc_match_expr (&fp->unit);
2098 if (m == MATCH_ERROR)
2106 if (gfc_match_char (')') == MATCH_YES)
2108 if (gfc_match_char (',') != MATCH_YES)
2111 m = match_file_element (fp);
2112 if (m == MATCH_ERROR)
2119 if (gfc_match_eos () != MATCH_YES)
2122 if (gfc_pure (NULL))
2124 gfc_error ("%s statement not allowed in PURE procedure at %C",
2125 gfc_ascii_statement (st));
2131 new_st.ext.filepos = fp;
2135 gfc_syntax_error (st);
2138 gfc_free_filepos (fp);
2144 gfc_resolve_filepos (gfc_filepos *fp)
2146 RESOLVE_TAG (&tag_unit, fp->unit);
2147 RESOLVE_TAG (&tag_iostat, fp->iostat);
2148 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2149 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2156 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2157 and the FLUSH statement. */
2160 gfc_match_endfile (void)
2162 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2166 gfc_match_backspace (void)
2168 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2172 gfc_match_rewind (void)
2174 return match_filepos (ST_REWIND, EXEC_REWIND);
2178 gfc_match_flush (void)
2180 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2184 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2187 /******************** Data Transfer Statements *********************/
2189 /* Return a default unit number. */
2192 default_unit (io_kind k)
2201 return gfc_int_expr (unit);
2205 /* Match a unit specification for a data transfer statement. */
2208 match_dt_unit (io_kind k, gfc_dt *dt)
2212 if (gfc_match_char ('*') == MATCH_YES)
2214 if (dt->io_unit != NULL)
2217 dt->io_unit = default_unit (k);
2221 if (gfc_match_expr (&e) == MATCH_YES)
2223 if (dt->io_unit != NULL)
2236 gfc_error ("Duplicate UNIT specification at %C");
2241 /* Match a format specification. */
2244 match_dt_format (gfc_dt *dt)
2248 gfc_st_label *label;
2251 where = gfc_current_locus;
2253 if (gfc_match_char ('*') == MATCH_YES)
2255 if (dt->format_expr != NULL || dt->format_label != NULL)
2258 dt->format_label = &format_asterisk;
2262 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2264 if (dt->format_expr != NULL || dt->format_label != NULL)
2266 gfc_free_st_label (label);
2270 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2273 dt->format_label = label;
2276 else if (m == MATCH_ERROR)
2277 /* The label was zero or too large. Emit the correct diagnosis. */
2280 if (gfc_match_expr (&e) == MATCH_YES)
2282 if (dt->format_expr != NULL || dt->format_label != NULL)
2287 dt->format_expr = e;
2291 gfc_current_locus = where; /* The only case where we have to restore */
2296 gfc_error ("Duplicate format specification at %C");
2301 /* Traverse a namelist that is part of a READ statement to make sure
2302 that none of the variables in the namelist are INTENT(IN). Returns
2303 nonzero if we find such a variable. */
2306 check_namelist (gfc_symbol *sym)
2310 for (p = sym->namelist; p; p = p->next)
2311 if (p->sym->attr.intent == INTENT_IN)
2313 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2314 p->sym->name, sym->name);
2322 /* Match a single data transfer element. */
2325 match_dt_element (io_kind k, gfc_dt *dt)
2327 char name[GFC_MAX_SYMBOL_LEN + 1];
2331 if (gfc_match (" unit =") == MATCH_YES)
2333 m = match_dt_unit (k, dt);
2338 if (gfc_match (" fmt =") == MATCH_YES)
2340 m = match_dt_format (dt);
2345 if (gfc_match (" nml = %n", name) == MATCH_YES)
2347 if (dt->namelist != NULL)
2349 gfc_error ("Duplicate NML specification at %C");
2353 if (gfc_find_symbol (name, NULL, 1, &sym))
2356 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2358 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2359 sym != NULL ? sym->name : name);
2364 if (k == M_READ && check_namelist (sym))
2370 m = match_etag (&tag_e_async, &dt->asynchronous);
2373 m = match_etag (&tag_e_blank, &dt->blank);
2376 m = match_etag (&tag_e_delim, &dt->delim);
2379 m = match_etag (&tag_e_pad, &dt->pad);
2382 m = match_etag (&tag_e_sign, &dt->sign);
2385 m = match_etag (&tag_e_round, &dt->round);
2388 m = match_out_tag (&tag_id, &dt->id);
2391 m = match_etag (&tag_e_decimal, &dt->decimal);
2394 m = match_etag (&tag_rec, &dt->rec);
2397 m = match_etag (&tag_spos, &dt->rec);
2400 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2403 m = match_out_tag (&tag_iostat, &dt->iostat);
2406 m = match_ltag (&tag_err, &dt->err);
2408 dt->err_where = gfc_current_locus;
2411 m = match_etag (&tag_advance, &dt->advance);
2414 m = match_out_tag (&tag_size, &dt->size);
2418 m = match_ltag (&tag_end, &dt->end);
2423 gfc_error ("END tag at %C not allowed in output statement");
2426 dt->end_where = gfc_current_locus;
2431 m = match_ltag (&tag_eor, &dt->eor);
2433 dt->eor_where = gfc_current_locus;
2441 /* Free a data transfer structure and everything below it. */
2444 gfc_free_dt (gfc_dt *dt)
2449 gfc_free_expr (dt->io_unit);
2450 gfc_free_expr (dt->format_expr);
2451 gfc_free_expr (dt->rec);
2452 gfc_free_expr (dt->advance);
2453 gfc_free_expr (dt->iomsg);
2454 gfc_free_expr (dt->iostat);
2455 gfc_free_expr (dt->size);
2456 gfc_free_expr (dt->pad);
2457 gfc_free_expr (dt->delim);
2458 gfc_free_expr (dt->sign);
2459 gfc_free_expr (dt->round);
2460 gfc_free_expr (dt->blank);
2461 gfc_free_expr (dt->decimal);
2462 gfc_free_expr (dt->extra_comma);
2467 /* Resolve everything in a gfc_dt structure. */
2470 gfc_resolve_dt (gfc_dt *dt)
2474 RESOLVE_TAG (&tag_format, dt->format_expr);
2475 RESOLVE_TAG (&tag_rec, dt->rec);
2476 RESOLVE_TAG (&tag_spos, dt->rec);
2477 RESOLVE_TAG (&tag_advance, dt->advance);
2478 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2479 RESOLVE_TAG (&tag_iostat, dt->iostat);
2480 RESOLVE_TAG (&tag_size, dt->size);
2481 RESOLVE_TAG (&tag_e_pad, dt->pad);
2482 RESOLVE_TAG (&tag_e_delim, dt->delim);
2483 RESOLVE_TAG (&tag_e_sign, dt->sign);
2484 RESOLVE_TAG (&tag_e_round, dt->round);
2485 RESOLVE_TAG (&tag_e_blank, dt->blank);
2486 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2489 if (gfc_resolve_expr (e) == SUCCESS
2490 && (e->ts.type != BT_INTEGER
2491 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2493 /* If there is no extra comma signifying the "format" form of the IO
2494 statement, then this must be an error. */
2495 if (!dt->extra_comma)
2497 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2498 "or a CHARACTER variable", &e->where);
2503 /* At this point, we have an extra comma. If io_unit has arrived as
2504 type character, we assume its really the "format" form of the I/O
2505 statement. We set the io_unit to the default unit and format to
2506 the character expression. See F95 Standard section 9.4. */
2508 k = dt->extra_comma->value.iokind;
2509 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2511 dt->format_expr = dt->io_unit;
2512 dt->io_unit = default_unit (k);
2514 /* Free this pointer now so that a warning/error is not triggered
2515 below for the "Extension". */
2516 gfc_free_expr (dt->extra_comma);
2517 dt->extra_comma = NULL;
2522 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2523 &dt->extra_comma->where);
2529 if (e->ts.type == BT_CHARACTER)
2531 if (gfc_has_vector_index (e))
2533 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2538 if (e->rank && e->ts.type != BT_CHARACTER)
2540 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2545 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2546 "item list at %L", &dt->extra_comma->where) == FAILURE)
2551 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2553 if (dt->err->defined == ST_LABEL_UNKNOWN)
2555 gfc_error ("ERR tag label %d at %L not defined",
2556 dt->err->value, &dt->err_where);
2563 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2565 if (dt->end->defined == ST_LABEL_UNKNOWN)
2567 gfc_error ("END tag label %d at %L not defined",
2568 dt->end->value, &dt->end_where);
2575 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2577 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2579 gfc_error ("EOR tag label %d at %L not defined",
2580 dt->eor->value, &dt->eor_where);
2585 /* Check the format label actually exists. */
2586 if (dt->format_label && dt->format_label != &format_asterisk
2587 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2589 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2590 &dt->format_label->where);
2597 /* Given an io_kind, return its name. */
2600 io_kind_name (io_kind k)
2619 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2626 /* Match an IO iteration statement of the form:
2628 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2630 which is equivalent to a single IO element. This function is
2631 mutually recursive with match_io_element(). */
2633 static match match_io_element (io_kind, gfc_code **);
2636 match_io_iterator (io_kind k, gfc_code **result)
2638 gfc_code *head, *tail, *new_code;
2646 old_loc = gfc_current_locus;
2648 if (gfc_match_char ('(') != MATCH_YES)
2651 m = match_io_element (k, &head);
2654 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2660 /* Can't be anything but an IO iterator. Build a list. */
2661 iter = gfc_get_iterator ();
2665 m = gfc_match_iterator (iter, 0);
2666 if (m == MATCH_ERROR)
2670 gfc_check_do_variable (iter->var->symtree);
2674 m = match_io_element (k, &new_code);
2675 if (m == MATCH_ERROR)
2684 tail = gfc_append_code (tail, new_code);
2686 if (gfc_match_char (',') != MATCH_YES)
2695 if (gfc_match_char (')') != MATCH_YES)
2698 new_code = gfc_get_code ();
2699 new_code->op = EXEC_DO;
2700 new_code->ext.iterator = iter;
2702 new_code->block = gfc_get_code ();
2703 new_code->block->op = EXEC_DO;
2704 new_code->block->next = head;
2710 gfc_error ("Syntax error in I/O iterator at %C");
2714 gfc_free_iterator (iter, 1);
2715 gfc_free_statements (head);
2716 gfc_current_locus = old_loc;
2721 /* Match a single element of an IO list, which is either a single
2722 expression or an IO Iterator. */
2725 match_io_element (io_kind k, gfc_code **cpp)
2733 m = match_io_iterator (k, cpp);
2739 m = gfc_match_variable (&expr, 0);
2741 gfc_error ("Expected variable in READ statement at %C");
2745 m = gfc_match_expr (&expr);
2747 gfc_error ("Expected expression in %s statement at %C",
2755 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2757 gfc_error ("Variable '%s' in input list at %C cannot be "
2758 "INTENT(IN)", expr->symtree->n.sym->name);
2763 && gfc_impure_variable (expr->symtree->n.sym)
2764 && current_dt->io_unit->ts.type == BT_CHARACTER)
2766 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2767 expr->symtree->n.sym->name);
2771 if (gfc_check_do_variable (expr->symtree))
2777 if (current_dt->io_unit->ts.type == BT_CHARACTER
2779 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2780 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2782 gfc_error ("Cannot write to internal file unit '%s' at %C "
2783 "inside a PURE procedure",
2784 current_dt->io_unit->symtree->n.sym->name);
2796 gfc_free_expr (expr);
2800 cp = gfc_get_code ();
2801 cp->op = EXEC_TRANSFER;
2809 /* Match an I/O list, building gfc_code structures as we go. */
2812 match_io_list (io_kind k, gfc_code **head_p)
2814 gfc_code *head, *tail, *new_code;
2817 *head_p = head = tail = NULL;
2818 if (gfc_match_eos () == MATCH_YES)
2823 m = match_io_element (k, &new_code);
2824 if (m == MATCH_ERROR)
2829 tail = gfc_append_code (tail, new_code);
2833 if (gfc_match_eos () == MATCH_YES)
2835 if (gfc_match_char (',') != MATCH_YES)
2843 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2846 gfc_free_statements (head);
2851 /* Attach the data transfer end node. */
2854 terminate_io (gfc_code *io_code)
2858 if (io_code == NULL)
2859 io_code = new_st.block;
2861 c = gfc_get_code ();
2862 c->op = EXEC_DT_END;
2864 /* Point to structure that is already there */
2865 c->ext.dt = new_st.ext.dt;
2866 gfc_append_code (io_code, c);
2870 /* Check the constraints for a data transfer statement. The majority of the
2871 constraints appearing in 9.4 of the standard appear here. Some are handled
2872 in resolve_tag and others in gfc_resolve_dt. */
2875 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2878 #define io_constraint(condition,msg,arg)\
2881 gfc_error(msg,arg);\
2887 gfc_symbol *sym = NULL;
2888 bool warn, unformatted;
2890 warn = (dt->err || dt->iostat) ? true : false;
2891 unformatted = dt->format_expr == NULL && dt->format_label == NULL
2892 && dt->namelist == NULL;
2897 if (expr && expr->expr_type == EXPR_VARIABLE
2898 && expr->ts.type == BT_CHARACTER)
2900 sym = expr->symtree->n.sym;
2902 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2903 "Internal file at %L must not be INTENT(IN)",
2906 io_constraint (gfc_has_vector_index (dt->io_unit),
2907 "Internal file incompatible with vector subscript at %L",
2910 io_constraint (dt->rec != NULL,
2911 "REC tag at %L is incompatible with internal file",
2914 io_constraint (unformatted,
2915 "Unformatted I/O not allowed with internal unit at %L",
2916 &dt->io_unit->where);
2918 io_constraint (dt->asynchronous != NULL,
2919 "ASYNCHRONOUS tag at %L not allowed with internal file",
2920 &dt->asynchronous->where);
2922 if (dt->namelist != NULL)
2924 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2925 "at %L with namelist", &expr->where)
2930 io_constraint (dt->advance != NULL,
2931 "ADVANCE tag at %L is incompatible with internal file",
2932 &dt->advance->where);
2935 if (expr && expr->ts.type != BT_CHARACTER)
2938 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2939 "IO UNIT in %s statement at %C must be "
2940 "an internal file in a PURE procedure",
2946 io_constraint (dt->end, "END tag not allowed with output at %L",
2949 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2952 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
2955 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
2958 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
2963 io_constraint (dt->size && dt->advance == NULL,
2964 "SIZE tag at %L requires an ADVANCE tag",
2967 io_constraint (dt->eor && dt->advance == NULL,
2968 "EOR tag at %L requires an ADVANCE tag",
2972 if (dt->asynchronous)
2974 static const char * asynchronous[] = { "YES", "NO", NULL };
2976 if (dt->asynchronous->expr_type != EXPR_CONSTANT)
2978 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
2979 "expression", &dt->asynchronous->where);
2983 if (!compare_to_allowed_values
2984 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
2985 dt->asynchronous->value.character.string,
2986 io_kind_name (k), warn))
2994 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
2995 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
2997 io_constraint (not_yes,
2998 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
2999 "specifier", &dt->id->where);
3004 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3005 "not allowed in Fortran 95") == FAILURE)
3008 if (dt->decimal->expr_type == EXPR_CONSTANT)
3010 static const char * decimal[] = { "COMMA", "POINT", NULL };
3012 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3013 dt->decimal->value.character.string,
3014 io_kind_name (k), warn))
3017 io_constraint (unformatted,
3018 "the DECIMAL= specifier at %L must be with an "
3019 "explicit format expression", &dt->decimal->where);
3025 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3026 "not allowed in Fortran 95") == FAILURE)
3029 if (dt->blank->expr_type == EXPR_CONSTANT)
3031 static const char * blank[] = { "NULL", "ZERO", NULL };
3033 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3034 dt->blank->value.character.string,
3035 io_kind_name (k), warn))
3038 io_constraint (unformatted,
3039 "the BLANK= specifier at %L must be with an "
3040 "explicit format expression", &dt->blank->where);
3046 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3047 "not allowed in Fortran 95") == FAILURE)
3050 if (dt->pad->expr_type == EXPR_CONSTANT)
3052 static const char * pad[] = { "YES", "NO", NULL };
3054 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3055 dt->pad->value.character.string,
3056 io_kind_name (k), warn))
3059 io_constraint (unformatted,
3060 "the PAD= specifier at %L must be with an "
3061 "explicit format expression", &dt->pad->where);
3067 /* When implemented, change the following to use gfc_notify_std F2003.
3068 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3069 "not allowed in Fortran 95") == FAILURE)
3070 return MATCH_ERROR; */
3071 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3074 if (dt->round->expr_type == EXPR_CONSTANT)
3076 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3077 "COMPATIBLE", "PROCESSOR_DEFINED",
3080 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3081 dt->round->value.character.string,
3082 io_kind_name (k), warn))
3089 /* When implemented, change the following to use gfc_notify_std F2003.
3090 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3091 "not allowed in Fortran 95") == FAILURE)
3092 return MATCH_ERROR; */
3093 if (dt->sign->expr_type == EXPR_CONSTANT)
3095 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3098 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3099 dt->sign->value.character.string,
3100 io_kind_name (k), warn))
3103 io_constraint (unformatted,
3104 "SIGN= specifier at %L must be with an "
3105 "explicit format expression", &dt->sign->where);
3107 io_constraint (k == M_READ,
3108 "SIGN= specifier at %L not allowed in a "
3109 "READ statement", &dt->sign->where);
3115 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3116 "not allowed in Fortran 95") == FAILURE)
3119 if (dt->delim->expr_type == EXPR_CONSTANT)
3121 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3123 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3124 dt->delim->value.character.string,
3125 io_kind_name (k), warn))
3128 io_constraint (k == M_READ,
3129 "DELIM= specifier at %L not allowed in a "
3130 "READ statement", &dt->delim->where);
3132 io_constraint (dt->format_label != &format_asterisk
3133 && dt->namelist == NULL,
3134 "DELIM= specifier at %L must have FMT=*",
3137 io_constraint (unformatted && dt->namelist == NULL,
3138 "DELIM= specifier at %L must be with FMT=* or "
3139 "NML= specifier ", &dt->delim->where);
3145 io_constraint (io_code && dt->namelist,
3146 "NAMELIST cannot be followed by IO-list at %L",
3149 io_constraint (dt->format_expr,
3150 "IO spec-list cannot contain both NAMELIST group name "
3151 "and format specification at %L.",
3152 &dt->format_expr->where);
3154 io_constraint (dt->format_label,
3155 "IO spec-list cannot contain both NAMELIST group name "
3156 "and format label at %L", spec_end);
3158 io_constraint (dt->rec,
3159 "NAMELIST IO is not allowed with a REC= specifier "
3160 "at %L.", &dt->rec->where);
3162 io_constraint (dt->advance,
3163 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3164 "at %L.", &dt->advance->where);
3169 io_constraint (dt->end,
3170 "An END tag is not allowed with a "
3171 "REC= specifier at %L.", &dt->end_where);
3173 io_constraint (dt->format_label == &format_asterisk,
3174 "FMT=* is not allowed with a REC= specifier "
3175 "at %L.", spec_end);
3180 int not_yes, not_no;
3183 io_constraint (dt->format_label == &format_asterisk,
3184 "List directed format(*) is not allowed with a "
3185 "ADVANCE= specifier at %L.", &expr->where);
3187 io_constraint (unformatted,
3188 "the ADVANCE= specifier at %L must appear with an "
3189 "explicit format expression", &expr->where);
3191 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3193 const gfc_char_t *advance = expr->value.character.string;
3194 not_no = gfc_wide_strlen (advance) != 2
3195 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3196 not_yes = gfc_wide_strlen (advance) != 3
3197 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3205 io_constraint (not_no && not_yes,
3206 "ADVANCE= specifier at %L must have value = "
3207 "YES or NO.", &expr->where);
3209 io_constraint (dt->size && not_no && k == M_READ,
3210 "SIZE tag at %L requires an ADVANCE = 'NO'",
3213 io_constraint (dt->eor && not_no && k == M_READ,
3214 "EOR tag at %L requires an ADVANCE = 'NO'",
3218 expr = dt->format_expr;
3219 if (gfc_simplify_expr (expr, 0) == FAILURE
3220 || check_format_string (expr, k == M_READ) == FAILURE)
3225 #undef io_constraint
3228 /* Match a READ, WRITE or PRINT statement. */
3231 match_io (io_kind k)
3233 char name[GFC_MAX_SYMBOL_LEN + 1];
3242 where = gfc_current_locus;
3244 current_dt = dt = XCNEW (gfc_dt);
3245 m = gfc_match_char ('(');
3248 where = gfc_current_locus;
3251 else if (k == M_PRINT)
3253 /* Treat the non-standard case of PRINT namelist. */
3254 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3255 && gfc_match_name (name) == MATCH_YES)
3257 gfc_find_symbol (name, NULL, 1, &sym);
3258 if (sym && sym->attr.flavor == FL_NAMELIST)
3260 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3261 "%C is an extension") == FAILURE)
3267 dt->io_unit = default_unit (k);
3272 gfc_current_locus = where;
3276 if (gfc_current_form == FORM_FREE)
3278 char c = gfc_peek_ascii_char ();
3279 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3286 m = match_dt_format (dt);
3287 if (m == MATCH_ERROR)
3293 dt->io_unit = default_unit (k);
3298 /* Before issuing an error for a malformed 'print (1,*)' type of
3299 error, check for a default-char-expr of the form ('(I0)'). */
3300 if (k == M_PRINT && m == MATCH_YES)
3302 /* Reset current locus to get the initial '(' in an expression. */
3303 gfc_current_locus = where;
3304 dt->format_expr = NULL;
3305 m = match_dt_format (dt);
3307 if (m == MATCH_ERROR)
3309 if (m == MATCH_NO || dt->format_expr == NULL)
3313 dt->io_unit = default_unit (k);
3318 /* Match a control list */
3319 if (match_dt_element (k, dt) == MATCH_YES)
3321 if (match_dt_unit (k, dt) != MATCH_YES)
3324 if (gfc_match_char (')') == MATCH_YES)
3326 if (gfc_match_char (',') != MATCH_YES)
3329 m = match_dt_element (k, dt);
3332 if (m == MATCH_ERROR)
3335 m = match_dt_format (dt);
3338 if (m == MATCH_ERROR)
3341 where = gfc_current_locus;
3343 m = gfc_match_name (name);
3346 gfc_find_symbol (name, NULL, 1, &sym);
3347 if (sym && sym->attr.flavor == FL_NAMELIST)
3350 if (k == M_READ && check_namelist (sym))
3359 gfc_current_locus = where;
3361 goto loop; /* No matches, try regular elements */
3364 if (gfc_match_char (')') == MATCH_YES)
3366 if (gfc_match_char (',') != MATCH_YES)
3372 m = match_dt_element (k, dt);
3375 if (m == MATCH_ERROR)
3378 if (gfc_match_char (')') == MATCH_YES)
3380 if (gfc_match_char (',') != MATCH_YES)
3386 /* Used in check_io_constraints, where no locus is available. */
3387 spec_end = gfc_current_locus;
3389 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3390 to save the locus. This is used later when resolving transfer statements
3391 that might have a format expression without unit number. */
3392 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3394 dt->extra_comma = gfc_get_expr ();
3396 /* Set the types to something compatible with iokind. This is needed to
3397 get through gfc_free_expr later since iokind really has no Basic Type,
3399 dt->extra_comma->expr_type = EXPR_CONSTANT;
3400 dt->extra_comma->ts.type = BT_LOGICAL;
3402 /* Save the iokind and locus for later use in resolution. */
3403 dt->extra_comma->value.iokind = k;
3404 dt->extra_comma->where = gfc_current_locus;
3408 if (gfc_match_eos () != MATCH_YES)
3410 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3412 gfc_error ("Expected comma in I/O list at %C");
3417 m = match_io_list (k, &io_code);
3418 if (m == MATCH_ERROR)
3424 /* A full IO statement has been matched. Check the constraints. spec_end is
3425 supplied for cases where no locus is supplied. */
3426 m = check_io_constraints (k, dt, io_code, &spec_end);
3428 if (m == MATCH_ERROR)
3431 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3433 new_st.block = gfc_get_code ();
3434 new_st.block->op = new_st.op;
3435 new_st.block->next = io_code;
3437 terminate_io (io_code);
3442 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3452 gfc_match_read (void)
3454 return match_io (M_READ);
3459 gfc_match_write (void)
3461 return match_io (M_WRITE);
3466 gfc_match_print (void)
3470 m = match_io (M_PRINT);
3474 if (gfc_pure (NULL))
3476 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3484 /* Free a gfc_inquire structure. */
3487 gfc_free_inquire (gfc_inquire *inquire)
3490 if (inquire == NULL)
3493 gfc_free_expr (inquire->unit);
3494 gfc_free_expr (inquire->file);
3495 gfc_free_expr (inquire->iomsg);
3496 gfc_free_expr (inquire->iostat);
3497 gfc_free_expr (inquire->exist);
3498 gfc_free_expr (inquire->opened);
3499 gfc_free_expr (inquire->number);
3500 gfc_free_expr (inquire->named);
3501 gfc_free_expr (inquire->name);
3502 gfc_free_expr (inquire->access);
3503 gfc_free_expr (inquire->sequential);
3504 gfc_free_expr (inquire->direct);
3505 gfc_free_expr (inquire->form);
3506 gfc_free_expr (inquire->formatted);
3507 gfc_free_expr (inquire->unformatted);
3508 gfc_free_expr (inquire->recl);
3509 gfc_free_expr (inquire->nextrec);
3510 gfc_free_expr (inquire->blank);
3511 gfc_free_expr (inquire->position);
3512 gfc_free_expr (inquire->action);
3513 gfc_free_expr (inquire->read);
3514 gfc_free_expr (inquire->write);
3515 gfc_free_expr (inquire->readwrite);
3516 gfc_free_expr (inquire->delim);
3517 gfc_free_expr (inquire->encoding);
3518 gfc_free_expr (inquire->pad);
3519 gfc_free_expr (inquire->iolength);
3520 gfc_free_expr (inquire->convert);
3521 gfc_free_expr (inquire->strm_pos);
3522 gfc_free_expr (inquire->asynchronous);
3523 gfc_free_expr (inquire->pending);
3524 gfc_free_expr (inquire->id);
3525 gfc_free_expr (inquire->sign);
3526 gfc_free_expr (inquire->round);
3531 /* Match an element of an INQUIRE statement. */
3533 #define RETM if (m != MATCH_NO) return m;
3536 match_inquire_element (gfc_inquire *inquire)
3540 m = match_etag (&tag_unit, &inquire->unit);
3541 RETM m = match_etag (&tag_file, &inquire->file);
3542 RETM m = match_ltag (&tag_err, &inquire->err);
3543 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3544 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3545 RETM m = match_vtag (&tag_exist, &inquire->exist);
3546 RETM m = match_vtag (&tag_opened, &inquire->opened);
3547 RETM m = match_vtag (&tag_named, &inquire->named);
3548 RETM m = match_vtag (&tag_name, &inquire->name);
3549 RETM m = match_out_tag (&tag_number, &inquire->number);
3550 RETM m = match_vtag (&tag_s_access, &inquire->access);
3551 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3552 RETM m = match_vtag (&tag_direct, &inquire->direct);
3553 RETM m = match_vtag (&tag_s_form, &inquire->form);
3554 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3555 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3556 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3557 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3558 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3559 RETM m = match_vtag (&tag_s_position, &inquire->position);
3560 RETM m = match_vtag (&tag_s_action, &inquire->action);
3561 RETM m = match_vtag (&tag_read, &inquire->read);
3562 RETM m = match_vtag (&tag_write, &inquire->write);
3563 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3564 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3565 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3566 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3567 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3568 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3569 RETM m = match_vtag (&tag_s_round, &inquire->round);
3570 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3571 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3572 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3573 RETM m = match_vtag (&tag_convert, &inquire->convert);
3574 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3575 RETM m = match_vtag (&tag_pending, &inquire->pending);
3576 RETM m = match_vtag (&tag_id, &inquire->id);
3577 RETM return MATCH_NO;
3584 gfc_match_inquire (void)
3586 gfc_inquire *inquire;
3591 m = gfc_match_char ('(');
3595 inquire = XCNEW (gfc_inquire);
3597 loc = gfc_current_locus;
3599 m = match_inquire_element (inquire);
3600 if (m == MATCH_ERROR)
3604 m = gfc_match_expr (&inquire->unit);
3605 if (m == MATCH_ERROR)
3611 /* See if we have the IOLENGTH form of the inquire statement. */
3612 if (inquire->iolength != NULL)
3614 if (gfc_match_char (')') != MATCH_YES)
3617 m = match_io_list (M_INQUIRE, &code);
3618 if (m == MATCH_ERROR)
3623 new_st.op = EXEC_IOLENGTH;
3624 new_st.expr = inquire->iolength;
3625 new_st.ext.inquire = inquire;
3627 if (gfc_pure (NULL))
3629 gfc_free_statements (code);
3630 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3634 new_st.block = gfc_get_code ();
3635 new_st.block->op = EXEC_IOLENGTH;
3636 terminate_io (code);
3637 new_st.block->next = code;
3641 /* At this point, we have the non-IOLENGTH inquire statement. */
3644 if (gfc_match_char (')') == MATCH_YES)
3646 if (gfc_match_char (',') != MATCH_YES)
3649 m = match_inquire_element (inquire);
3650 if (m == MATCH_ERROR)
3655 if (inquire->iolength != NULL)
3657 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3662 if (gfc_match_eos () != MATCH_YES)
3665 if (inquire->unit != NULL && inquire->file != NULL)
3667 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3668 "UNIT specifiers", &loc);
3672 if (inquire->unit == NULL && inquire->file == NULL)
3674 gfc_error ("INQUIRE statement at %L requires either FILE or "
3675 "UNIT specifier", &loc);
3679 if (gfc_pure (NULL))
3681 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3685 if (inquire->id != NULL && inquire->pending == NULL)
3687 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3688 "the ID= specifier", &loc);
3692 new_st.op = EXEC_INQUIRE;
3693 new_st.ext.inquire = inquire;
3697 gfc_syntax_error (ST_INQUIRE);
3700 gfc_free_inquire (inquire);
3705 /* Resolve everything in a gfc_inquire structure. */
3708 gfc_resolve_inquire (gfc_inquire *inquire)
3710 RESOLVE_TAG (&tag_unit, inquire->unit);
3711 RESOLVE_TAG (&tag_file, inquire->file);
3712 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3713 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3714 RESOLVE_TAG (&tag_exist, inquire->exist);
3715 RESOLVE_TAG (&tag_opened, inquire->opened);
3716 RESOLVE_TAG (&tag_number, inquire->number);
3717 RESOLVE_TAG (&tag_named, inquire->named);
3718 RESOLVE_TAG (&tag_name, inquire->name);
3719 RESOLVE_TAG (&tag_s_access, inquire->access);
3720 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3721 RESOLVE_TAG (&tag_direct, inquire->direct);
3722 RESOLVE_TAG (&tag_s_form, inquire->form);
3723 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3724 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3725 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3726 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3727 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3728 RESOLVE_TAG (&tag_s_position, inquire->position);
3729 RESOLVE_TAG (&tag_s_action, inquire->action);
3730 RESOLVE_TAG (&tag_read, inquire->read);
3731 RESOLVE_TAG (&tag_write, inquire->write);
3732 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3733 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3734 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3735 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3736 RESOLVE_TAG (&tag_s_round, inquire->round);
3737 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3738 RESOLVE_TAG (&tag_convert, inquire->convert);
3739 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3740 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3741 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3742 RESOLVE_TAG (&tag_s_round, inquire->round);
3743 RESOLVE_TAG (&tag_pending, inquire->pending);
3744 RESOLVE_TAG (&tag_id, inquire->id);
3746 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3754 gfc_free_wait (gfc_wait *wait)
3759 gfc_free_expr (wait->unit);
3760 gfc_free_expr (wait->iostat);
3761 gfc_free_expr (wait->iomsg);
3762 gfc_free_expr (wait->id);
3767 gfc_resolve_wait (gfc_wait *wait)
3769 RESOLVE_TAG (&tag_unit, wait->unit);
3770 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3771 RESOLVE_TAG (&tag_iostat, wait->iostat);
3772 RESOLVE_TAG (&tag_id, wait->id);
3774 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3777 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3783 /* Match an element of a WAIT statement. */
3785 #define RETM if (m != MATCH_NO) return m;
3788 match_wait_element (gfc_wait *wait)
3792 m = match_etag (&tag_unit, &wait->unit);
3793 RETM m = match_ltag (&tag_err, &wait->err);
3794 RETM m = match_ltag (&tag_end, &wait->eor);
3795 RETM m = match_ltag (&tag_eor, &wait->end);
3796 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
3797 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
3798 RETM m = match_etag (&tag_id, &wait->id);
3799 RETM return MATCH_NO;
3806 gfc_match_wait (void)
3812 m = gfc_match_char ('(');
3816 wait = XCNEW (gfc_wait);
3818 loc = gfc_current_locus;
3820 m = match_wait_element (wait);
3821 if (m == MATCH_ERROR)
3825 m = gfc_match_expr (&wait->unit);
3826 if (m == MATCH_ERROR)
3834 if (gfc_match_char (')') == MATCH_YES)
3836 if (gfc_match_char (',') != MATCH_YES)
3839 m = match_wait_element (wait);
3840 if (m == MATCH_ERROR)
3846 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
3847 "not allowed in Fortran 95") == FAILURE)
3850 if (gfc_pure (NULL))
3852 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
3856 new_st.op = EXEC_WAIT;
3857 new_st.ext.wait = wait;
3862 gfc_syntax_error (ST_WAIT);
3865 gfc_free_wait (wait);