1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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},
98 tag_newunit = {"NEWUNIT", " newunit =", " %v", BT_INTEGER};
100 static gfc_dt *current_dt;
102 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
105 /**************** Fortran 95 FORMAT parser *****************/
107 /* FORMAT tokens returned by format_lex(). */
110 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
111 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_LPAREN,
112 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
113 FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END,
114 FMT_ERROR, FMT_DC, FMT_DP, FMT_T, FMT_TR, FMT_TL, FMT_STAR
118 /* Local variables for checking format strings. The saved_token is
119 used to back up by a single format token during the parsing
121 static gfc_char_t *format_string;
122 static int format_string_pos;
123 static int format_length, use_last_char;
124 static int starting_format_length;
125 static char error_element;
126 static locus format_locus;
128 static format_token saved_token;
131 { MODE_STRING, MODE_FORMAT, MODE_COPY }
135 /* Return the next character in the format string. */
138 next_char (int in_string)
150 if (mode == MODE_STRING)
151 c = *format_string++;
154 c = gfc_next_char_literal (in_string);
159 if (gfc_option.flag_backslash && c == '\\')
161 locus old_locus = gfc_current_locus;
163 if (gfc_match_special_char (&c) == MATCH_NO)
164 gfc_current_locus = old_locus;
166 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
167 gfc_warning ("Extension: backslash character at %C");
170 if (mode == MODE_COPY)
171 *format_string++ = c;
173 if (mode != MODE_STRING)
174 format_locus = gfc_current_locus;
178 c = gfc_wide_toupper (c);
183 /* Back up one character position. Only works once. */
191 /* Eat up the spaces and return a character. */
194 next_char_not_space (bool *error)
199 error_element = c = next_char (0);
202 if (gfc_option.allow_std & GFC_STD_GNU)
203 gfc_warning ("Extension: Tab character in format at %C");
206 gfc_error ("Extension: Tab character in format at %C");
212 while (gfc_is_whitespace (c));
216 static int value = 0;
218 /* Simple lexical analyzer for getting the next token in a FORMAT
230 if (saved_token != FMT_NONE)
233 saved_token = FMT_NONE;
237 c = next_char_not_space (&error);
245 c = next_char_not_space (&error);
256 c = next_char_not_space (&error);
258 value = 10 * value + c - '0';
267 token = FMT_SIGNED_INT;
286 c = next_char_not_space (&error);
289 value = 10 * value + c - '0';
297 token = zflag ? FMT_ZERO : FMT_POSINT;
321 c = next_char_not_space (&error);
349 c = next_char_not_space (&error);
350 if (c != 'P' && c != 'S')
357 c = next_char_not_space (&error);
358 if (c == 'N' || c == 'Z')
419 c = next_char_not_space (&error);
449 c = next_char_not_space (&error);
452 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
453 "specifier not allowed at %C") == FAILURE)
459 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
460 "specifier not allowed at %C") == FAILURE)
492 token_to_string (format_token t)
511 /* Check a format statement. The format string, either from a FORMAT
512 statement or a constant in an I/O statement has already been parsed
513 by itself, and we are checking it for validity. The dual origin
514 means that the warning message is a little less than great. */
517 check_format (bool is_input)
519 const char *posint_required = _("Positive width required");
520 const char *nonneg_required = _("Nonnegative width required");
521 const char *unexpected_element = _("Unexpected element '%c' in format string"
523 const char *unexpected_end = _("Unexpected end of format string");
524 const char *zero_width = _("Zero width in format descriptor");
533 saved_token = FMT_NONE;
537 format_string_pos = 0;
544 error = _("Missing leading left parenthesis");
552 goto finished; /* Empty format is legal */
556 /* In this state, the next thing has to be a format item. */
573 error = _("Left parenthesis required after '*'");
598 /* Signed integer can only precede a P format. */
604 error = _("Expected P edit descriptor");
611 /* P requires a prior number. */
612 error = _("P descriptor requires leading scale factor");
616 /* X requires a prior number if we're being pedantic. */
617 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
618 "requires leading space count at %L", &format_locus)
630 goto extension_optional_comma;
641 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %L",
642 &format_locus) == FAILURE)
644 if (t != FMT_RPAREN || level > 0)
646 gfc_warning ("$ should be the last specifier in format at %L",
648 goto optional_comma_1;
669 error = unexpected_end;
673 error = unexpected_element;
678 /* In this state, t must currently be a data descriptor.
679 Deal with things that can/must follow the descriptor. */
690 /* Comma after P is allowed only for F, E, EN, ES, D, or G.
695 if (gfc_option.allow_std < GFC_STD_F2003 && t != FMT_COMMA
696 && t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES
697 && t != FMT_D && t != FMT_G && t != FMT_RPAREN)
699 error = _("Comma required after P descriptor");
710 if (t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES && t != FMT_D
711 && t != FMT_G && t != FMT_RPAREN)
713 error = _("Comma required after P descriptor");
727 error = _("Positive width required with T descriptor");
739 switch (gfc_notification_std (GFC_STD_GNU))
742 if (mode != MODE_FORMAT)
743 format_locus.nextc += format_string_pos;
744 gfc_warning ("Extension: Missing positive width after L "
745 "descriptor at %L", &format_locus);
750 error = posint_required;
781 if (t == FMT_G && u == FMT_ZERO)
788 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
789 "format at %L", &format_locus) == FAILURE)
800 error = posint_required;
806 error = _("E specifier not allowed with g0 descriptor");
815 format_locus.nextc += format_string_pos;
816 gfc_error_now ("Positive width required in format "
817 "specifier %s at %L", token_to_string (t),
828 /* Warn if -std=legacy, otherwise error. */
829 format_locus.nextc += format_string_pos;
830 if (gfc_option.warn_std != 0)
832 gfc_error_now ("Period required in format "
833 "specifier %s at %L", token_to_string (t),
839 gfc_warning ("Period required in format "
840 "specifier %s at %L", token_to_string (t),
849 if (u != FMT_ZERO && u != FMT_POSINT)
851 error = nonneg_required;
858 /* Look for optional exponent. */
873 error = _("Positive exponent width required");
884 if (t != FMT_ZERO && t != FMT_POSINT)
886 error = nonneg_required;
889 else if (is_input && t == FMT_ZERO)
891 error = posint_required;
900 /* Warn if -std=legacy, otherwise error. */
901 if (gfc_option.warn_std != 0)
903 error = _("Period required in format specifier");
906 if (mode != MODE_FORMAT)
907 format_locus.nextc += format_string_pos;
908 gfc_warning ("Period required in format specifier at %L",
917 if (t != FMT_ZERO && t != FMT_POSINT)
919 error = nonneg_required;
926 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
928 if (mode != MODE_FORMAT)
929 format_locus.nextc += format_string_pos;
930 gfc_warning ("The H format specifier at %L is"
931 " a Fortran 95 deleted feature", &format_locus);
944 if (t != FMT_ZERO && t != FMT_POSINT)
946 error = nonneg_required;
949 else if (is_input && t == FMT_ZERO)
951 error = posint_required;
967 if (t != FMT_ZERO && t != FMT_POSINT)
969 error = nonneg_required;
977 error = unexpected_element;
982 /* Between a descriptor and what comes next. */
1000 goto optional_comma;
1003 error = unexpected_end;
1007 if (mode != MODE_FORMAT)
1008 format_locus.nextc += format_string_pos;
1009 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1010 &format_locus) == FAILURE)
1016 /* Optional comma is a weird between state where we've just finished
1017 reading a colon, slash, dollar or P descriptor. */
1034 /* Assume that we have another format item. */
1041 extension_optional_comma:
1042 /* As a GNU extension, permit a missing comma after a string literal. */
1059 goto optional_comma;
1062 error = unexpected_end;
1066 if (mode != MODE_FORMAT)
1067 format_locus.nextc += format_string_pos;
1068 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1069 &format_locus) == FAILURE)
1078 if (mode != MODE_FORMAT)
1079 format_locus.nextc += format_string_pos;
1080 if (error == unexpected_element)
1081 gfc_error (error, error_element, &format_locus);
1083 gfc_error ("%s in format string at %L", error, &format_locus);
1088 /* check for extraneous characters at end of valid format string */
1089 if ( starting_format_length > format_length )
1091 format_locus.nextc += format_length + 1; /* point to the extra */
1092 gfc_warning ("Extraneous characters in format at %L", &format_locus);
1099 /* Given an expression node that is a constant string, see if it looks
1100 like a format string. */
1103 check_format_string (gfc_expr *e, bool is_input)
1105 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1109 format_string = e->value.character.string;
1110 starting_format_length = e->value.character.length;
1111 /* More elaborate measures are needed to show where a problem is within a
1112 format string that has been calculated, but that's probably not worth the
1114 format_locus = e->where;
1116 return check_format (is_input);
1120 /************ Fortran 95 I/O statement matchers *************/
1122 /* Match a FORMAT statement. This amounts to actually parsing the
1123 format descriptors in order to correctly locate the end of the
1127 gfc_match_format (void)
1132 if (gfc_current_ns->proc_name
1133 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1135 gfc_error ("Format statement in module main block at %C");
1139 if (gfc_statement_label == NULL)
1141 gfc_error ("Missing format label at %C");
1144 gfc_gobble_whitespace ();
1149 start = gfc_current_locus;
1151 if (check_format (false) == FAILURE)
1154 if (gfc_match_eos () != MATCH_YES)
1156 gfc_syntax_error (ST_FORMAT);
1160 /* The label doesn't get created until after the statement is done
1161 being matched, so we have to leave the string for later. */
1163 gfc_current_locus = start; /* Back to the beginning */
1166 new_st.op = EXEC_NOP;
1169 e->expr_type = EXPR_CONSTANT;
1170 e->ts.type = BT_CHARACTER;
1171 e->ts.kind = gfc_default_character_kind;
1173 e->value.character.string = format_string
1174 = gfc_get_wide_string (format_length + 1);
1175 e->value.character.length = format_length;
1176 gfc_statement_label->format = e;
1179 check_format (false); /* Guaranteed to succeed */
1180 gfc_match_eos (); /* Guaranteed to succeed */
1186 /* Match an expression I/O tag of some sort. */
1189 match_etag (const io_tag *tag, gfc_expr **v)
1194 m = gfc_match (tag->spec);
1198 m = gfc_match (tag->value, &result);
1201 gfc_error ("Invalid value for %s specification at %C", tag->name);
1207 gfc_error ("Duplicate %s specification at %C", tag->name);
1208 gfc_free_expr (result);
1217 /* Match a variable I/O tag of some sort. */
1220 match_vtag (const io_tag *tag, gfc_expr **v)
1225 m = gfc_match (tag->spec);
1229 m = gfc_match (tag->value, &result);
1232 gfc_error ("Invalid value for %s specification at %C", tag->name);
1238 gfc_error ("Duplicate %s specification at %C", tag->name);
1239 gfc_free_expr (result);
1243 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1245 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1246 gfc_free_expr (result);
1250 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1252 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1254 gfc_free_expr (result);
1263 /* Match I/O tags that cause variables to become redefined. */
1266 match_out_tag (const io_tag *tag, gfc_expr **result)
1270 m = match_vtag (tag, result);
1272 gfc_check_do_variable ((*result)->symtree);
1278 /* Match a label I/O tag. */
1281 match_ltag (const io_tag *tag, gfc_st_label ** label)
1287 m = gfc_match (tag->spec);
1291 m = gfc_match (tag->value, label);
1294 gfc_error ("Invalid value for %s specification at %C", tag->name);
1300 gfc_error ("Duplicate %s label specification at %C", tag->name);
1304 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1311 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1314 resolve_tag_format (const gfc_expr *e)
1316 if (e->expr_type == EXPR_CONSTANT
1317 && (e->ts.type != BT_CHARACTER
1318 || e->ts.kind != gfc_default_character_kind))
1320 gfc_error ("Constant expression in FORMAT tag at %L must be "
1321 "of type default CHARACTER", &e->where);
1325 /* If e's rank is zero and e is not an element of an array, it should be
1326 of integer or character type. The integer variable should be
1329 && (e->expr_type != EXPR_VARIABLE
1330 || e->symtree == NULL
1331 || e->symtree->n.sym->as == NULL
1332 || e->symtree->n.sym->as->rank == 0))
1334 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1336 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1340 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1342 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1343 "variable in FORMAT tag at %L", &e->where)
1346 if (e->symtree->n.sym->attr.assign != 1)
1348 gfc_error ("Variable '%s' at %L has not been assigned a "
1349 "format label", e->symtree->n.sym->name, &e->where);
1353 else if (e->ts.type == BT_INTEGER)
1355 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1356 "variable", gfc_basic_typename (e->ts.type), &e->where);
1363 /* If rank is nonzero and type is not character, we allow it under GFC_STD_LEGACY.
1364 It may be assigned an Hollerith constant. */
1365 if (e->ts.type != BT_CHARACTER)
1367 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1368 "in FORMAT tag at %L", &e->where) == FAILURE)
1371 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SHAPE)
1373 gfc_error ("Non-character assumed shape array element in FORMAT"
1374 " tag at %L", &e->where);
1378 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SIZE)
1380 gfc_error ("Non-character assumed size array element in FORMAT"
1381 " tag at %L", &e->where);
1385 if (e->rank == 0 && e->symtree->n.sym->attr.pointer)
1387 gfc_error ("Non-character pointer array element in FORMAT tag at %L",
1397 /* Do expression resolution and type-checking on an expression tag. */
1400 resolve_tag (const io_tag *tag, gfc_expr *e)
1405 if (gfc_resolve_expr (e) == FAILURE)
1408 if (tag == &tag_format)
1409 return resolve_tag_format (e);
1411 if (e->ts.type != tag->type)
1413 gfc_error ("%s tag at %L must be of type %s", tag->name,
1414 &e->where, gfc_basic_typename (tag->type));
1420 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1424 if (tag == &tag_iomsg)
1426 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1427 &e->where) == FAILURE)
1431 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1432 && e->ts.kind != gfc_default_integer_kind)
1434 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1435 "INTEGER in %s tag at %L", tag->name, &e->where)
1440 if (tag == &tag_convert)
1442 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1443 &e->where) == FAILURE)
1451 /* Match a single tag of an OPEN statement. */
1454 match_open_element (gfc_open *open)
1458 m = match_etag (&tag_e_async, &open->asynchronous);
1461 m = match_etag (&tag_unit, &open->unit);
1464 m = match_out_tag (&tag_iomsg, &open->iomsg);
1467 m = match_out_tag (&tag_iostat, &open->iostat);
1470 m = match_etag (&tag_file, &open->file);
1473 m = match_etag (&tag_status, &open->status);
1476 m = match_etag (&tag_e_access, &open->access);
1479 m = match_etag (&tag_e_form, &open->form);
1482 m = match_etag (&tag_e_recl, &open->recl);
1485 m = match_etag (&tag_e_blank, &open->blank);
1488 m = match_etag (&tag_e_position, &open->position);
1491 m = match_etag (&tag_e_action, &open->action);
1494 m = match_etag (&tag_e_delim, &open->delim);
1497 m = match_etag (&tag_e_pad, &open->pad);
1500 m = match_etag (&tag_e_decimal, &open->decimal);
1503 m = match_etag (&tag_e_encoding, &open->encoding);
1506 m = match_etag (&tag_e_round, &open->round);
1509 m = match_etag (&tag_e_sign, &open->sign);
1512 m = match_ltag (&tag_err, &open->err);
1515 m = match_etag (&tag_convert, &open->convert);
1518 m = match_out_tag (&tag_newunit, &open->newunit);
1526 /* Free the gfc_open structure and all the expressions it contains. */
1529 gfc_free_open (gfc_open *open)
1534 gfc_free_expr (open->unit);
1535 gfc_free_expr (open->iomsg);
1536 gfc_free_expr (open->iostat);
1537 gfc_free_expr (open->file);
1538 gfc_free_expr (open->status);
1539 gfc_free_expr (open->access);
1540 gfc_free_expr (open->form);
1541 gfc_free_expr (open->recl);
1542 gfc_free_expr (open->blank);
1543 gfc_free_expr (open->position);
1544 gfc_free_expr (open->action);
1545 gfc_free_expr (open->delim);
1546 gfc_free_expr (open->pad);
1547 gfc_free_expr (open->decimal);
1548 gfc_free_expr (open->encoding);
1549 gfc_free_expr (open->round);
1550 gfc_free_expr (open->sign);
1551 gfc_free_expr (open->convert);
1552 gfc_free_expr (open->asynchronous);
1553 gfc_free_expr (open->newunit);
1558 /* Resolve everything in a gfc_open structure. */
1561 gfc_resolve_open (gfc_open *open)
1564 RESOLVE_TAG (&tag_unit, open->unit);
1565 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1566 RESOLVE_TAG (&tag_iostat, open->iostat);
1567 RESOLVE_TAG (&tag_file, open->file);
1568 RESOLVE_TAG (&tag_status, open->status);
1569 RESOLVE_TAG (&tag_e_access, open->access);
1570 RESOLVE_TAG (&tag_e_form, open->form);
1571 RESOLVE_TAG (&tag_e_recl, open->recl);
1572 RESOLVE_TAG (&tag_e_blank, open->blank);
1573 RESOLVE_TAG (&tag_e_position, open->position);
1574 RESOLVE_TAG (&tag_e_action, open->action);
1575 RESOLVE_TAG (&tag_e_delim, open->delim);
1576 RESOLVE_TAG (&tag_e_pad, open->pad);
1577 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1578 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1579 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1580 RESOLVE_TAG (&tag_e_round, open->round);
1581 RESOLVE_TAG (&tag_e_sign, open->sign);
1582 RESOLVE_TAG (&tag_convert, open->convert);
1583 RESOLVE_TAG (&tag_newunit, open->newunit);
1585 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1592 /* Check if a given value for a SPECIFIER is either in the list of values
1593 allowed in F95 or F2003, issuing an error message and returning a zero
1594 value if it is not allowed. */
1597 compare_to_allowed_values (const char *specifier, const char *allowed[],
1598 const char *allowed_f2003[],
1599 const char *allowed_gnu[], gfc_char_t *value,
1600 const char *statement, bool warn)
1605 len = gfc_wide_strlen (value);
1608 for (len--; len > 0; len--)
1609 if (value[len] != ' ')
1614 for (i = 0; allowed[i]; i++)
1615 if (len == strlen (allowed[i])
1616 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1619 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1620 if (len == strlen (allowed_f2003[i])
1621 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1622 strlen (allowed_f2003[i])) == 0)
1624 notification n = gfc_notification_std (GFC_STD_F2003);
1626 if (n == WARNING || (warn && n == ERROR))
1628 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1629 "has value '%s'", specifier, statement,
1636 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1637 "%s statement at %C has value '%s'", specifier,
1638 statement, allowed_f2003[i]);
1646 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1647 if (len == strlen (allowed_gnu[i])
1648 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1649 strlen (allowed_gnu[i])) == 0)
1651 notification n = gfc_notification_std (GFC_STD_GNU);
1653 if (n == WARNING || (warn && n == ERROR))
1655 gfc_warning ("Extension: %s specifier in %s statement at %C "
1656 "has value '%s'", specifier, statement,
1663 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1664 "%s statement at %C has value '%s'", specifier,
1665 statement, allowed_gnu[i]);
1675 char *s = gfc_widechar_to_char (value, -1);
1676 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1677 specifier, statement, s);
1683 char *s = gfc_widechar_to_char (value, -1);
1684 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1685 specifier, statement, s);
1692 /* Match an OPEN statement. */
1695 gfc_match_open (void)
1701 m = gfc_match_char ('(');
1705 open = XCNEW (gfc_open);
1707 m = match_open_element (open);
1709 if (m == MATCH_ERROR)
1713 m = gfc_match_expr (&open->unit);
1716 if (m == MATCH_ERROR)
1722 if (gfc_match_char (')') == MATCH_YES)
1724 if (gfc_match_char (',') != MATCH_YES)
1727 m = match_open_element (open);
1728 if (m == MATCH_ERROR)
1734 if (gfc_match_eos () == MATCH_NO)
1737 if (gfc_pure (NULL))
1739 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1743 warn = (open->err || open->iostat) ? true : false;
1745 /* Checks on NEWUNIT specifier. */
1750 gfc_error ("UNIT specifier not allowed with NEWUNIT at %C");
1754 if (!(open->file || (open->status
1755 && gfc_wide_strncasecmp (open->status->value.character.string,
1756 "scratch", 7) == 0)))
1758 gfc_error ("NEWUNIT specifier must have FILE= "
1759 "or STATUS='scratch' at %C");
1764 /* Checks on the ACCESS specifier. */
1765 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1767 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1768 static const char *access_f2003[] = { "STREAM", NULL };
1769 static const char *access_gnu[] = { "APPEND", NULL };
1771 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1773 open->access->value.character.string,
1778 /* Checks on the ACTION specifier. */
1779 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1781 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1783 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1784 open->action->value.character.string,
1789 /* Checks on the ASYNCHRONOUS specifier. */
1790 if (open->asynchronous)
1792 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1793 "not allowed in Fortran 95") == FAILURE)
1796 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1798 static const char * asynchronous[] = { "YES", "NO", NULL };
1800 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1801 NULL, NULL, open->asynchronous->value.character.string,
1807 /* Checks on the BLANK specifier. */
1810 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1811 "not allowed in Fortran 95") == FAILURE)
1814 if (open->blank->expr_type == EXPR_CONSTANT)
1816 static const char *blank[] = { "ZERO", "NULL", NULL };
1818 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1819 open->blank->value.character.string,
1825 /* Checks on the DECIMAL specifier. */
1828 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1829 "not allowed in Fortran 95") == FAILURE)
1832 if (open->decimal->expr_type == EXPR_CONSTANT)
1834 static const char * decimal[] = { "COMMA", "POINT", NULL };
1836 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1837 open->decimal->value.character.string,
1843 /* Checks on the DELIM specifier. */
1846 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1847 "not allowed in Fortran 95") == FAILURE)
1850 if (open->delim->expr_type == EXPR_CONSTANT)
1852 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1854 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1855 open->delim->value.character.string,
1861 /* Checks on the ENCODING specifier. */
1864 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1865 "not allowed in Fortran 95") == FAILURE)
1868 if (open->encoding->expr_type == EXPR_CONSTANT)
1870 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1872 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1873 open->encoding->value.character.string,
1879 /* Checks on the FORM specifier. */
1880 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1882 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1884 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1885 open->form->value.character.string,
1890 /* Checks on the PAD specifier. */
1891 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1893 static const char *pad[] = { "YES", "NO", NULL };
1895 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1896 open->pad->value.character.string,
1901 /* Checks on the POSITION specifier. */
1902 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1904 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1906 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1907 open->position->value.character.string,
1912 /* Checks on the ROUND specifier. */
1915 /* When implemented, change the following to use gfc_notify_std F2003. */
1916 gfc_error ("Fortran F2003: ROUND= specifier at %C not implemented");
1919 if (open->round->expr_type == EXPR_CONSTANT)
1921 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1922 "COMPATIBLE", "PROCESSOR_DEFINED",
1925 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1926 open->round->value.character.string,
1932 /* Checks on the SIGN specifier. */
1935 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1936 "not allowed in Fortran 95") == FAILURE)
1939 if (open->sign->expr_type == EXPR_CONSTANT)
1941 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1944 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1945 open->sign->value.character.string,
1951 #define warn_or_error(...) \
1954 gfc_warning (__VA_ARGS__); \
1957 gfc_error (__VA_ARGS__); \
1962 /* Checks on the RECL specifier. */
1963 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1964 && open->recl->ts.type == BT_INTEGER
1965 && mpz_sgn (open->recl->value.integer) != 1)
1967 warn_or_error ("RECL in OPEN statement at %C must be positive");
1970 /* Checks on the STATUS specifier. */
1971 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1973 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1974 "REPLACE", "UNKNOWN", NULL };
1976 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1977 open->status->value.character.string,
1981 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1982 the FILE= specifier shall appear. */
1983 if (open->file == NULL
1984 && (gfc_wide_strncasecmp (open->status->value.character.string,
1986 || gfc_wide_strncasecmp (open->status->value.character.string,
1989 char *s = gfc_widechar_to_char (open->status->value.character.string,
1991 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1992 "'%s' and no FILE specifier is present", s);
1996 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1997 the FILE= specifier shall not appear. */
1998 if (gfc_wide_strncasecmp (open->status->value.character.string,
1999 "scratch", 7) == 0 && open->file)
2001 warn_or_error ("The STATUS specified in OPEN statement at %C "
2002 "cannot have the value SCRATCH if a FILE specifier "
2007 /* Things that are not allowed for unformatted I/O. */
2008 if (open->form && open->form->expr_type == EXPR_CONSTANT
2009 && (open->delim || open->decimal || open->encoding || open->round
2010 || open->sign || open->pad || open->blank)
2011 && gfc_wide_strncasecmp (open->form->value.character.string,
2012 "unformatted", 11) == 0)
2014 const char *spec = (open->delim ? "DELIM "
2015 : (open->pad ? "PAD " : open->blank
2018 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
2019 "unformatted I/O", spec);
2022 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
2023 && gfc_wide_strncasecmp (open->access->value.character.string,
2026 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
2031 && open->access && open->access->expr_type == EXPR_CONSTANT
2032 && !(gfc_wide_strncasecmp (open->access->value.character.string,
2033 "sequential", 10) == 0
2034 || gfc_wide_strncasecmp (open->access->value.character.string,
2036 || gfc_wide_strncasecmp (open->access->value.character.string,
2039 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
2040 "for stream or sequential ACCESS");
2043 #undef warn_or_error
2045 new_st.op = EXEC_OPEN;
2046 new_st.ext.open = open;
2050 gfc_syntax_error (ST_OPEN);
2053 gfc_free_open (open);
2058 /* Free a gfc_close structure an all its expressions. */
2061 gfc_free_close (gfc_close *close)
2066 gfc_free_expr (close->unit);
2067 gfc_free_expr (close->iomsg);
2068 gfc_free_expr (close->iostat);
2069 gfc_free_expr (close->status);
2074 /* Match elements of a CLOSE statement. */
2077 match_close_element (gfc_close *close)
2081 m = match_etag (&tag_unit, &close->unit);
2084 m = match_etag (&tag_status, &close->status);
2087 m = match_out_tag (&tag_iomsg, &close->iomsg);
2090 m = match_out_tag (&tag_iostat, &close->iostat);
2093 m = match_ltag (&tag_err, &close->err);
2101 /* Match a CLOSE statement. */
2104 gfc_match_close (void)
2110 m = gfc_match_char ('(');
2114 close = XCNEW (gfc_close);
2116 m = match_close_element (close);
2118 if (m == MATCH_ERROR)
2122 m = gfc_match_expr (&close->unit);
2125 if (m == MATCH_ERROR)
2131 if (gfc_match_char (')') == MATCH_YES)
2133 if (gfc_match_char (',') != MATCH_YES)
2136 m = match_close_element (close);
2137 if (m == MATCH_ERROR)
2143 if (gfc_match_eos () == MATCH_NO)
2146 if (gfc_pure (NULL))
2148 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2152 warn = (close->iostat || close->err) ? true : false;
2154 /* Checks on the STATUS specifier. */
2155 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2157 static const char *status[] = { "KEEP", "DELETE", NULL };
2159 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2160 close->status->value.character.string,
2165 new_st.op = EXEC_CLOSE;
2166 new_st.ext.close = close;
2170 gfc_syntax_error (ST_CLOSE);
2173 gfc_free_close (close);
2178 /* Resolve everything in a gfc_close structure. */
2181 gfc_resolve_close (gfc_close *close)
2183 RESOLVE_TAG (&tag_unit, close->unit);
2184 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2185 RESOLVE_TAG (&tag_iostat, close->iostat);
2186 RESOLVE_TAG (&tag_status, close->status);
2188 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2191 if (close->unit->expr_type == EXPR_CONSTANT
2192 && close->unit->ts.type == BT_INTEGER
2193 && mpz_sgn (close->unit->value.integer) < 0)
2195 gfc_error ("UNIT number in CLOSE statement at %L must be non-negative",
2196 &close->unit->where);
2203 /* Free a gfc_filepos structure. */
2206 gfc_free_filepos (gfc_filepos *fp)
2208 gfc_free_expr (fp->unit);
2209 gfc_free_expr (fp->iomsg);
2210 gfc_free_expr (fp->iostat);
2215 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2218 match_file_element (gfc_filepos *fp)
2222 m = match_etag (&tag_unit, &fp->unit);
2225 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2228 m = match_out_tag (&tag_iostat, &fp->iostat);
2231 m = match_ltag (&tag_err, &fp->err);
2239 /* Match the second half of the file-positioning statements, REWIND,
2240 BACKSPACE, ENDFILE, or the FLUSH statement. */
2243 match_filepos (gfc_statement st, gfc_exec_op op)
2248 fp = XCNEW (gfc_filepos);
2250 if (gfc_match_char ('(') == MATCH_NO)
2252 m = gfc_match_expr (&fp->unit);
2253 if (m == MATCH_ERROR)
2261 m = match_file_element (fp);
2262 if (m == MATCH_ERROR)
2266 m = gfc_match_expr (&fp->unit);
2267 if (m == MATCH_ERROR)
2275 if (gfc_match_char (')') == MATCH_YES)
2277 if (gfc_match_char (',') != MATCH_YES)
2280 m = match_file_element (fp);
2281 if (m == MATCH_ERROR)
2288 if (gfc_match_eos () != MATCH_YES)
2291 if (gfc_pure (NULL))
2293 gfc_error ("%s statement not allowed in PURE procedure at %C",
2294 gfc_ascii_statement (st));
2300 new_st.ext.filepos = fp;
2304 gfc_syntax_error (st);
2307 gfc_free_filepos (fp);
2313 gfc_resolve_filepos (gfc_filepos *fp)
2315 RESOLVE_TAG (&tag_unit, fp->unit);
2316 RESOLVE_TAG (&tag_iostat, fp->iostat);
2317 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2318 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2321 if (fp->unit->expr_type == EXPR_CONSTANT
2322 && fp->unit->ts.type == BT_INTEGER
2323 && mpz_sgn (fp->unit->value.integer) < 0)
2325 gfc_error ("UNIT number in statement at %L must be non-negative",
2333 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2334 and the FLUSH statement. */
2337 gfc_match_endfile (void)
2339 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2343 gfc_match_backspace (void)
2345 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2349 gfc_match_rewind (void)
2351 return match_filepos (ST_REWIND, EXEC_REWIND);
2355 gfc_match_flush (void)
2357 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2361 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2364 /******************** Data Transfer Statements *********************/
2366 /* Return a default unit number. */
2369 default_unit (io_kind k)
2378 return gfc_int_expr (unit);
2382 /* Match a unit specification for a data transfer statement. */
2385 match_dt_unit (io_kind k, gfc_dt *dt)
2389 if (gfc_match_char ('*') == MATCH_YES)
2391 if (dt->io_unit != NULL)
2394 dt->io_unit = default_unit (k);
2398 if (gfc_match_expr (&e) == MATCH_YES)
2400 if (dt->io_unit != NULL)
2413 gfc_error ("Duplicate UNIT specification at %C");
2418 /* Match a format specification. */
2421 match_dt_format (gfc_dt *dt)
2425 gfc_st_label *label;
2428 where = gfc_current_locus;
2430 if (gfc_match_char ('*') == MATCH_YES)
2432 if (dt->format_expr != NULL || dt->format_label != NULL)
2435 dt->format_label = &format_asterisk;
2439 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2441 if (dt->format_expr != NULL || dt->format_label != NULL)
2443 gfc_free_st_label (label);
2447 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2450 dt->format_label = label;
2453 else if (m == MATCH_ERROR)
2454 /* The label was zero or too large. Emit the correct diagnosis. */
2457 if (gfc_match_expr (&e) == MATCH_YES)
2459 if (dt->format_expr != NULL || dt->format_label != NULL)
2464 dt->format_expr = e;
2468 gfc_current_locus = where; /* The only case where we have to restore */
2473 gfc_error ("Duplicate format specification at %C");
2478 /* Traverse a namelist that is part of a READ statement to make sure
2479 that none of the variables in the namelist are INTENT(IN). Returns
2480 nonzero if we find such a variable. */
2483 check_namelist (gfc_symbol *sym)
2487 for (p = sym->namelist; p; p = p->next)
2488 if (p->sym->attr.intent == INTENT_IN)
2490 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2491 p->sym->name, sym->name);
2499 /* Match a single data transfer element. */
2502 match_dt_element (io_kind k, gfc_dt *dt)
2504 char name[GFC_MAX_SYMBOL_LEN + 1];
2508 if (gfc_match (" unit =") == MATCH_YES)
2510 m = match_dt_unit (k, dt);
2515 if (gfc_match (" fmt =") == MATCH_YES)
2517 m = match_dt_format (dt);
2522 if (gfc_match (" nml = %n", name) == MATCH_YES)
2524 if (dt->namelist != NULL)
2526 gfc_error ("Duplicate NML specification at %C");
2530 if (gfc_find_symbol (name, NULL, 1, &sym))
2533 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2535 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2536 sym != NULL ? sym->name : name);
2541 if (k == M_READ && check_namelist (sym))
2547 m = match_etag (&tag_e_async, &dt->asynchronous);
2550 m = match_etag (&tag_e_blank, &dt->blank);
2553 m = match_etag (&tag_e_delim, &dt->delim);
2556 m = match_etag (&tag_e_pad, &dt->pad);
2559 m = match_etag (&tag_e_sign, &dt->sign);
2562 m = match_etag (&tag_e_round, &dt->round);
2565 m = match_out_tag (&tag_id, &dt->id);
2568 m = match_etag (&tag_e_decimal, &dt->decimal);
2571 m = match_etag (&tag_rec, &dt->rec);
2574 m = match_etag (&tag_spos, &dt->pos);
2577 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2580 m = match_out_tag (&tag_iostat, &dt->iostat);
2583 m = match_ltag (&tag_err, &dt->err);
2585 dt->err_where = gfc_current_locus;
2588 m = match_etag (&tag_advance, &dt->advance);
2591 m = match_out_tag (&tag_size, &dt->size);
2595 m = match_ltag (&tag_end, &dt->end);
2600 gfc_error ("END tag at %C not allowed in output statement");
2603 dt->end_where = gfc_current_locus;
2608 m = match_ltag (&tag_eor, &dt->eor);
2610 dt->eor_where = gfc_current_locus;
2618 /* Free a data transfer structure and everything below it. */
2621 gfc_free_dt (gfc_dt *dt)
2626 gfc_free_expr (dt->io_unit);
2627 gfc_free_expr (dt->format_expr);
2628 gfc_free_expr (dt->rec);
2629 gfc_free_expr (dt->advance);
2630 gfc_free_expr (dt->iomsg);
2631 gfc_free_expr (dt->iostat);
2632 gfc_free_expr (dt->size);
2633 gfc_free_expr (dt->pad);
2634 gfc_free_expr (dt->delim);
2635 gfc_free_expr (dt->sign);
2636 gfc_free_expr (dt->round);
2637 gfc_free_expr (dt->blank);
2638 gfc_free_expr (dt->decimal);
2639 gfc_free_expr (dt->extra_comma);
2640 gfc_free_expr (dt->pos);
2645 /* Resolve everything in a gfc_dt structure. */
2648 gfc_resolve_dt (gfc_dt *dt, locus *loc)
2652 RESOLVE_TAG (&tag_format, dt->format_expr);
2653 RESOLVE_TAG (&tag_rec, dt->rec);
2654 RESOLVE_TAG (&tag_spos, dt->pos);
2655 RESOLVE_TAG (&tag_advance, dt->advance);
2656 RESOLVE_TAG (&tag_id, dt->id);
2657 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2658 RESOLVE_TAG (&tag_iostat, dt->iostat);
2659 RESOLVE_TAG (&tag_size, dt->size);
2660 RESOLVE_TAG (&tag_e_pad, dt->pad);
2661 RESOLVE_TAG (&tag_e_delim, dt->delim);
2662 RESOLVE_TAG (&tag_e_sign, dt->sign);
2663 RESOLVE_TAG (&tag_e_round, dt->round);
2664 RESOLVE_TAG (&tag_e_blank, dt->blank);
2665 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2666 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2671 gfc_error ("UNIT not specified at %L", loc);
2675 if (gfc_resolve_expr (e) == SUCCESS
2676 && (e->ts.type != BT_INTEGER
2677 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2679 /* If there is no extra comma signifying the "format" form of the IO
2680 statement, then this must be an error. */
2681 if (!dt->extra_comma)
2683 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2684 "or a CHARACTER variable", &e->where);
2689 /* At this point, we have an extra comma. If io_unit has arrived as
2690 type character, we assume its really the "format" form of the I/O
2691 statement. We set the io_unit to the default unit and format to
2692 the character expression. See F95 Standard section 9.4. */
2694 k = dt->extra_comma->value.iokind;
2695 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2697 dt->format_expr = dt->io_unit;
2698 dt->io_unit = default_unit (k);
2700 /* Free this pointer now so that a warning/error is not triggered
2701 below for the "Extension". */
2702 gfc_free_expr (dt->extra_comma);
2703 dt->extra_comma = NULL;
2708 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2709 &dt->extra_comma->where);
2715 if (e->ts.type == BT_CHARACTER)
2717 if (gfc_has_vector_index (e))
2719 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2724 if (e->rank && e->ts.type != BT_CHARACTER)
2726 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2730 if (e->expr_type == EXPR_CONSTANT && e->ts.type == BT_INTEGER
2731 && mpz_sgn (e->value.integer) < 0)
2733 gfc_error ("UNIT number in statement at %L must be non-negative", &e->where);
2738 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2739 "item list at %L", &dt->extra_comma->where) == FAILURE)
2744 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2746 if (dt->err->defined == ST_LABEL_UNKNOWN)
2748 gfc_error ("ERR tag label %d at %L not defined",
2749 dt->err->value, &dt->err_where);
2756 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2758 if (dt->end->defined == ST_LABEL_UNKNOWN)
2760 gfc_error ("END tag label %d at %L not defined",
2761 dt->end->value, &dt->end_where);
2768 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2770 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2772 gfc_error ("EOR tag label %d at %L not defined",
2773 dt->eor->value, &dt->eor_where);
2778 /* Check the format label actually exists. */
2779 if (dt->format_label && dt->format_label != &format_asterisk
2780 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2782 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2783 &dt->format_label->where);
2790 /* Given an io_kind, return its name. */
2793 io_kind_name (io_kind k)
2812 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2819 /* Match an IO iteration statement of the form:
2821 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2823 which is equivalent to a single IO element. This function is
2824 mutually recursive with match_io_element(). */
2826 static match match_io_element (io_kind, gfc_code **);
2829 match_io_iterator (io_kind k, gfc_code **result)
2831 gfc_code *head, *tail, *new_code;
2839 old_loc = gfc_current_locus;
2841 if (gfc_match_char ('(') != MATCH_YES)
2844 m = match_io_element (k, &head);
2847 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2853 /* Can't be anything but an IO iterator. Build a list. */
2854 iter = gfc_get_iterator ();
2858 m = gfc_match_iterator (iter, 0);
2859 if (m == MATCH_ERROR)
2863 gfc_check_do_variable (iter->var->symtree);
2867 m = match_io_element (k, &new_code);
2868 if (m == MATCH_ERROR)
2877 tail = gfc_append_code (tail, new_code);
2879 if (gfc_match_char (',') != MATCH_YES)
2888 if (gfc_match_char (')') != MATCH_YES)
2891 new_code = gfc_get_code ();
2892 new_code->op = EXEC_DO;
2893 new_code->ext.iterator = iter;
2895 new_code->block = gfc_get_code ();
2896 new_code->block->op = EXEC_DO;
2897 new_code->block->next = head;
2903 gfc_error ("Syntax error in I/O iterator at %C");
2907 gfc_free_iterator (iter, 1);
2908 gfc_free_statements (head);
2909 gfc_current_locus = old_loc;
2914 /* Match a single element of an IO list, which is either a single
2915 expression or an IO Iterator. */
2918 match_io_element (io_kind k, gfc_code **cpp)
2926 m = match_io_iterator (k, cpp);
2932 m = gfc_match_variable (&expr, 0);
2934 gfc_error ("Expected variable in READ statement at %C");
2938 m = gfc_match_expr (&expr);
2940 gfc_error ("Expected expression in %s statement at %C",
2948 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2950 gfc_error ("Variable '%s' in input list at %C cannot be "
2951 "INTENT(IN)", expr->symtree->n.sym->name);
2956 && gfc_impure_variable (expr->symtree->n.sym)
2957 && current_dt->io_unit
2958 && current_dt->io_unit->ts.type == BT_CHARACTER)
2960 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2961 expr->symtree->n.sym->name);
2965 if (gfc_check_do_variable (expr->symtree))
2971 if (current_dt->io_unit
2972 && current_dt->io_unit->ts.type == BT_CHARACTER
2974 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2975 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2977 gfc_error ("Cannot write to internal file unit '%s' at %C "
2978 "inside a PURE procedure",
2979 current_dt->io_unit->symtree->n.sym->name);
2991 gfc_free_expr (expr);
2995 cp = gfc_get_code ();
2996 cp->op = EXEC_TRANSFER;
3004 /* Match an I/O list, building gfc_code structures as we go. */
3007 match_io_list (io_kind k, gfc_code **head_p)
3009 gfc_code *head, *tail, *new_code;
3012 *head_p = head = tail = NULL;
3013 if (gfc_match_eos () == MATCH_YES)
3018 m = match_io_element (k, &new_code);
3019 if (m == MATCH_ERROR)
3024 tail = gfc_append_code (tail, new_code);
3028 if (gfc_match_eos () == MATCH_YES)
3030 if (gfc_match_char (',') != MATCH_YES)
3038 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3041 gfc_free_statements (head);
3046 /* Attach the data transfer end node. */
3049 terminate_io (gfc_code *io_code)
3053 if (io_code == NULL)
3054 io_code = new_st.block;
3056 c = gfc_get_code ();
3057 c->op = EXEC_DT_END;
3059 /* Point to structure that is already there */
3060 c->ext.dt = new_st.ext.dt;
3061 gfc_append_code (io_code, c);
3065 /* Check the constraints for a data transfer statement. The majority of the
3066 constraints appearing in 9.4 of the standard appear here. Some are handled
3067 in resolve_tag and others in gfc_resolve_dt. */
3070 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
3073 #define io_constraint(condition,msg,arg)\
3076 gfc_error(msg,arg);\
3082 gfc_symbol *sym = NULL;
3083 bool warn, unformatted;
3085 warn = (dt->err || dt->iostat) ? true : false;
3086 unformatted = dt->format_expr == NULL && dt->format_label == NULL
3087 && dt->namelist == NULL;
3092 if (expr && expr->expr_type == EXPR_VARIABLE
3093 && expr->ts.type == BT_CHARACTER)
3095 sym = expr->symtree->n.sym;
3097 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
3098 "Internal file at %L must not be INTENT(IN)",
3101 io_constraint (gfc_has_vector_index (dt->io_unit),
3102 "Internal file incompatible with vector subscript at %L",
3105 io_constraint (dt->rec != NULL,
3106 "REC tag at %L is incompatible with internal file",
3109 io_constraint (dt->pos != NULL,
3110 "POS tag at %L is incompatible with internal file",
3113 io_constraint (unformatted,
3114 "Unformatted I/O not allowed with internal unit at %L",
3115 &dt->io_unit->where);
3117 io_constraint (dt->asynchronous != NULL,
3118 "ASYNCHRONOUS tag at %L not allowed with internal file",
3119 &dt->asynchronous->where);
3121 if (dt->namelist != NULL)
3123 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
3124 "at %L with namelist", &expr->where)
3129 io_constraint (dt->advance != NULL,
3130 "ADVANCE tag at %L is incompatible with internal file",
3131 &dt->advance->where);
3134 if (expr && expr->ts.type != BT_CHARACTER)
3137 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
3138 "IO UNIT in %s statement at %C must be "
3139 "an internal file in a PURE procedure",
3145 io_constraint (dt->end, "END tag not allowed with output at %L",
3148 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
3151 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
3154 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
3157 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
3162 io_constraint (dt->size && dt->advance == NULL,
3163 "SIZE tag at %L requires an ADVANCE tag",
3166 io_constraint (dt->eor && dt->advance == NULL,
3167 "EOR tag at %L requires an ADVANCE tag",
3171 if (dt->asynchronous)
3173 static const char * asynchronous[] = { "YES", "NO", NULL };
3175 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
3177 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
3178 "expression", &dt->asynchronous->where);
3182 if (!compare_to_allowed_values
3183 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3184 dt->asynchronous->value.character.string,
3185 io_kind_name (k), warn))
3193 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3194 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3196 io_constraint (not_yes,
3197 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3198 "specifier", &dt->id->where);
3203 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3204 "not allowed in Fortran 95") == FAILURE)
3207 if (dt->decimal->expr_type == EXPR_CONSTANT)
3209 static const char * decimal[] = { "COMMA", "POINT", NULL };
3211 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3212 dt->decimal->value.character.string,
3213 io_kind_name (k), warn))
3216 io_constraint (unformatted,
3217 "the DECIMAL= specifier at %L must be with an "
3218 "explicit format expression", &dt->decimal->where);
3224 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3225 "not allowed in Fortran 95") == FAILURE)
3228 if (dt->blank->expr_type == EXPR_CONSTANT)
3230 static const char * blank[] = { "NULL", "ZERO", NULL };
3232 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3233 dt->blank->value.character.string,
3234 io_kind_name (k), warn))
3237 io_constraint (unformatted,
3238 "the BLANK= specifier at %L must be with an "
3239 "explicit format expression", &dt->blank->where);
3245 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3246 "not allowed in Fortran 95") == FAILURE)
3249 if (dt->pad->expr_type == EXPR_CONSTANT)
3251 static const char * pad[] = { "YES", "NO", NULL };
3253 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3254 dt->pad->value.character.string,
3255 io_kind_name (k), warn))
3258 io_constraint (unformatted,
3259 "the PAD= specifier at %L must be with an "
3260 "explicit format expression", &dt->pad->where);
3266 /* When implemented, change the following to use gfc_notify_std F2003.
3267 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3268 "not allowed in Fortran 95") == FAILURE)
3269 return MATCH_ERROR; */
3270 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3273 if (dt->round->expr_type == EXPR_CONSTANT)
3275 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3276 "COMPATIBLE", "PROCESSOR_DEFINED",
3279 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3280 dt->round->value.character.string,
3281 io_kind_name (k), warn))
3288 /* When implemented, change the following to use gfc_notify_std F2003.
3289 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3290 "not allowed in Fortran 95") == FAILURE)
3291 return MATCH_ERROR; */
3292 if (dt->sign->expr_type == EXPR_CONSTANT)
3294 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3297 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3298 dt->sign->value.character.string,
3299 io_kind_name (k), warn))
3302 io_constraint (unformatted,
3303 "SIGN= specifier at %L must be with an "
3304 "explicit format expression", &dt->sign->where);
3306 io_constraint (k == M_READ,
3307 "SIGN= specifier at %L not allowed in a "
3308 "READ statement", &dt->sign->where);
3314 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3315 "not allowed in Fortran 95") == FAILURE)
3318 if (dt->delim->expr_type == EXPR_CONSTANT)
3320 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3322 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3323 dt->delim->value.character.string,
3324 io_kind_name (k), warn))
3327 io_constraint (k == M_READ,
3328 "DELIM= specifier at %L not allowed in a "
3329 "READ statement", &dt->delim->where);
3331 io_constraint (dt->format_label != &format_asterisk
3332 && dt->namelist == NULL,
3333 "DELIM= specifier at %L must have FMT=*",
3336 io_constraint (unformatted && dt->namelist == NULL,
3337 "DELIM= specifier at %L must be with FMT=* or "
3338 "NML= specifier ", &dt->delim->where);
3344 io_constraint (io_code && dt->namelist,
3345 "NAMELIST cannot be followed by IO-list at %L",
3348 io_constraint (dt->format_expr,
3349 "IO spec-list cannot contain both NAMELIST group name "
3350 "and format specification at %L",
3351 &dt->format_expr->where);
3353 io_constraint (dt->format_label,
3354 "IO spec-list cannot contain both NAMELIST group name "
3355 "and format label at %L", spec_end);
3357 io_constraint (dt->rec,
3358 "NAMELIST IO is not allowed with a REC= specifier "
3359 "at %L", &dt->rec->where);
3361 io_constraint (dt->advance,
3362 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3363 "at %L", &dt->advance->where);
3368 io_constraint (dt->end,
3369 "An END tag is not allowed with a "
3370 "REC= specifier at %L", &dt->end_where);
3372 io_constraint (dt->format_label == &format_asterisk,
3373 "FMT=* is not allowed with a REC= specifier "
3376 io_constraint (dt->pos,
3377 "POS= is not allowed with REC= specifier "
3378 "at %L", &dt->pos->where);
3383 int not_yes, not_no;
3386 io_constraint (dt->format_label == &format_asterisk,
3387 "List directed format(*) is not allowed with a "
3388 "ADVANCE= specifier at %L.", &expr->where);
3390 io_constraint (unformatted,
3391 "the ADVANCE= specifier at %L must appear with an "
3392 "explicit format expression", &expr->where);
3394 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3396 const gfc_char_t *advance = expr->value.character.string;
3397 not_no = gfc_wide_strlen (advance) != 2
3398 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3399 not_yes = gfc_wide_strlen (advance) != 3
3400 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3408 io_constraint (not_no && not_yes,
3409 "ADVANCE= specifier at %L must have value = "
3410 "YES or NO.", &expr->where);
3412 io_constraint (dt->size && not_no && k == M_READ,
3413 "SIZE tag at %L requires an ADVANCE = 'NO'",
3416 io_constraint (dt->eor && not_no && k == M_READ,
3417 "EOR tag at %L requires an ADVANCE = 'NO'",
3421 expr = dt->format_expr;
3422 if (gfc_simplify_expr (expr, 0) == FAILURE
3423 || check_format_string (expr, k == M_READ) == FAILURE)
3428 #undef io_constraint
3431 /* Match a READ, WRITE or PRINT statement. */
3434 match_io (io_kind k)
3436 char name[GFC_MAX_SYMBOL_LEN + 1];
3445 where = gfc_current_locus;
3447 current_dt = dt = XCNEW (gfc_dt);
3448 m = gfc_match_char ('(');
3451 where = gfc_current_locus;
3454 else if (k == M_PRINT)
3456 /* Treat the non-standard case of PRINT namelist. */
3457 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3458 && gfc_match_name (name) == MATCH_YES)
3460 gfc_find_symbol (name, NULL, 1, &sym);
3461 if (sym && sym->attr.flavor == FL_NAMELIST)
3463 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3464 "%C is an extension") == FAILURE)
3470 dt->io_unit = default_unit (k);
3475 gfc_current_locus = where;
3479 if (gfc_current_form == FORM_FREE)
3481 char c = gfc_peek_ascii_char ();
3482 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3489 m = match_dt_format (dt);
3490 if (m == MATCH_ERROR)
3496 dt->io_unit = default_unit (k);
3501 /* Before issuing an error for a malformed 'print (1,*)' type of
3502 error, check for a default-char-expr of the form ('(I0)'). */
3503 if (k == M_PRINT && m == MATCH_YES)
3505 /* Reset current locus to get the initial '(' in an expression. */
3506 gfc_current_locus = where;
3507 dt->format_expr = NULL;
3508 m = match_dt_format (dt);
3510 if (m == MATCH_ERROR)
3512 if (m == MATCH_NO || dt->format_expr == NULL)
3516 dt->io_unit = default_unit (k);
3521 /* Match a control list */
3522 if (match_dt_element (k, dt) == MATCH_YES)
3524 if (match_dt_unit (k, dt) != MATCH_YES)
3527 if (gfc_match_char (')') == MATCH_YES)
3529 if (gfc_match_char (',') != MATCH_YES)
3532 m = match_dt_element (k, dt);
3535 if (m == MATCH_ERROR)
3538 m = match_dt_format (dt);
3541 if (m == MATCH_ERROR)
3544 where = gfc_current_locus;
3546 m = gfc_match_name (name);
3549 gfc_find_symbol (name, NULL, 1, &sym);
3550 if (sym && sym->attr.flavor == FL_NAMELIST)
3553 if (k == M_READ && check_namelist (sym))
3562 gfc_current_locus = where;
3564 goto loop; /* No matches, try regular elements */
3567 if (gfc_match_char (')') == MATCH_YES)
3569 if (gfc_match_char (',') != MATCH_YES)
3575 m = match_dt_element (k, dt);
3578 if (m == MATCH_ERROR)
3581 if (gfc_match_char (')') == MATCH_YES)
3583 if (gfc_match_char (',') != MATCH_YES)
3589 /* Used in check_io_constraints, where no locus is available. */
3590 spec_end = gfc_current_locus;
3592 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3593 to save the locus. This is used later when resolving transfer statements
3594 that might have a format expression without unit number. */
3595 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3597 dt->extra_comma = gfc_get_expr ();
3599 /* Set the types to something compatible with iokind. This is needed to
3600 get through gfc_free_expr later since iokind really has no Basic Type,
3602 dt->extra_comma->expr_type = EXPR_CONSTANT;
3603 dt->extra_comma->ts.type = BT_LOGICAL;
3605 /* Save the iokind and locus for later use in resolution. */
3606 dt->extra_comma->value.iokind = k;
3607 dt->extra_comma->where = gfc_current_locus;
3611 if (gfc_match_eos () != MATCH_YES)
3613 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3615 gfc_error ("Expected comma in I/O list at %C");
3620 m = match_io_list (k, &io_code);
3621 if (m == MATCH_ERROR)
3627 /* A full IO statement has been matched. Check the constraints. spec_end is
3628 supplied for cases where no locus is supplied. */
3629 m = check_io_constraints (k, dt, io_code, &spec_end);
3631 if (m == MATCH_ERROR)
3634 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3636 new_st.block = gfc_get_code ();
3637 new_st.block->op = new_st.op;
3638 new_st.block->next = io_code;
3640 terminate_io (io_code);
3645 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3655 gfc_match_read (void)
3657 return match_io (M_READ);
3662 gfc_match_write (void)
3664 return match_io (M_WRITE);
3669 gfc_match_print (void)
3673 m = match_io (M_PRINT);
3677 if (gfc_pure (NULL))
3679 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3687 /* Free a gfc_inquire structure. */
3690 gfc_free_inquire (gfc_inquire *inquire)
3693 if (inquire == NULL)
3696 gfc_free_expr (inquire->unit);
3697 gfc_free_expr (inquire->file);
3698 gfc_free_expr (inquire->iomsg);
3699 gfc_free_expr (inquire->iostat);
3700 gfc_free_expr (inquire->exist);
3701 gfc_free_expr (inquire->opened);
3702 gfc_free_expr (inquire->number);
3703 gfc_free_expr (inquire->named);
3704 gfc_free_expr (inquire->name);
3705 gfc_free_expr (inquire->access);
3706 gfc_free_expr (inquire->sequential);
3707 gfc_free_expr (inquire->direct);
3708 gfc_free_expr (inquire->form);
3709 gfc_free_expr (inquire->formatted);
3710 gfc_free_expr (inquire->unformatted);
3711 gfc_free_expr (inquire->recl);
3712 gfc_free_expr (inquire->nextrec);
3713 gfc_free_expr (inquire->blank);
3714 gfc_free_expr (inquire->position);
3715 gfc_free_expr (inquire->action);
3716 gfc_free_expr (inquire->read);
3717 gfc_free_expr (inquire->write);
3718 gfc_free_expr (inquire->readwrite);
3719 gfc_free_expr (inquire->delim);
3720 gfc_free_expr (inquire->encoding);
3721 gfc_free_expr (inquire->pad);
3722 gfc_free_expr (inquire->iolength);
3723 gfc_free_expr (inquire->convert);
3724 gfc_free_expr (inquire->strm_pos);
3725 gfc_free_expr (inquire->asynchronous);
3726 gfc_free_expr (inquire->decimal);
3727 gfc_free_expr (inquire->pending);
3728 gfc_free_expr (inquire->id);
3729 gfc_free_expr (inquire->sign);
3730 gfc_free_expr (inquire->size);
3731 gfc_free_expr (inquire->round);
3736 /* Match an element of an INQUIRE statement. */
3738 #define RETM if (m != MATCH_NO) return m;
3741 match_inquire_element (gfc_inquire *inquire)
3745 m = match_etag (&tag_unit, &inquire->unit);
3746 RETM m = match_etag (&tag_file, &inquire->file);
3747 RETM m = match_ltag (&tag_err, &inquire->err);
3748 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3749 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3750 RETM m = match_vtag (&tag_exist, &inquire->exist);
3751 RETM m = match_vtag (&tag_opened, &inquire->opened);
3752 RETM m = match_vtag (&tag_named, &inquire->named);
3753 RETM m = match_vtag (&tag_name, &inquire->name);
3754 RETM m = match_out_tag (&tag_number, &inquire->number);
3755 RETM m = match_vtag (&tag_s_access, &inquire->access);
3756 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3757 RETM m = match_vtag (&tag_direct, &inquire->direct);
3758 RETM m = match_vtag (&tag_s_form, &inquire->form);
3759 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3760 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3761 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3762 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3763 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3764 RETM m = match_vtag (&tag_s_position, &inquire->position);
3765 RETM m = match_vtag (&tag_s_action, &inquire->action);
3766 RETM m = match_vtag (&tag_read, &inquire->read);
3767 RETM m = match_vtag (&tag_write, &inquire->write);
3768 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3769 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3770 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3771 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3772 RETM m = match_vtag (&tag_size, &inquire->size);
3773 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3774 RETM m = match_vtag (&tag_s_round, &inquire->round);
3775 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3776 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3777 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3778 RETM m = match_vtag (&tag_convert, &inquire->convert);
3779 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3780 RETM m = match_vtag (&tag_pending, &inquire->pending);
3781 RETM m = match_vtag (&tag_id, &inquire->id);
3782 RETM return MATCH_NO;
3789 gfc_match_inquire (void)
3791 gfc_inquire *inquire;
3796 m = gfc_match_char ('(');
3800 inquire = XCNEW (gfc_inquire);
3802 loc = gfc_current_locus;
3804 m = match_inquire_element (inquire);
3805 if (m == MATCH_ERROR)
3809 m = gfc_match_expr (&inquire->unit);
3810 if (m == MATCH_ERROR)
3816 /* See if we have the IOLENGTH form of the inquire statement. */
3817 if (inquire->iolength != NULL)
3819 if (gfc_match_char (')') != MATCH_YES)
3822 m = match_io_list (M_INQUIRE, &code);
3823 if (m == MATCH_ERROR)
3828 new_st.op = EXEC_IOLENGTH;
3829 new_st.expr1 = inquire->iolength;
3830 new_st.ext.inquire = inquire;
3832 if (gfc_pure (NULL))
3834 gfc_free_statements (code);
3835 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3839 new_st.block = gfc_get_code ();
3840 new_st.block->op = EXEC_IOLENGTH;
3841 terminate_io (code);
3842 new_st.block->next = code;
3846 /* At this point, we have the non-IOLENGTH inquire statement. */
3849 if (gfc_match_char (')') == MATCH_YES)
3851 if (gfc_match_char (',') != MATCH_YES)
3854 m = match_inquire_element (inquire);
3855 if (m == MATCH_ERROR)
3860 if (inquire->iolength != NULL)
3862 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3867 if (gfc_match_eos () != MATCH_YES)
3870 if (inquire->unit != NULL && inquire->file != NULL)
3872 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3873 "UNIT specifiers", &loc);
3877 if (inquire->unit == NULL && inquire->file == NULL)
3879 gfc_error ("INQUIRE statement at %L requires either FILE or "
3880 "UNIT specifier", &loc);
3884 if (gfc_pure (NULL))
3886 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3890 if (inquire->id != NULL && inquire->pending == NULL)
3892 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3893 "the ID= specifier", &loc);
3897 new_st.op = EXEC_INQUIRE;
3898 new_st.ext.inquire = inquire;
3902 gfc_syntax_error (ST_INQUIRE);
3905 gfc_free_inquire (inquire);
3910 /* Resolve everything in a gfc_inquire structure. */
3913 gfc_resolve_inquire (gfc_inquire *inquire)
3915 RESOLVE_TAG (&tag_unit, inquire->unit);
3916 RESOLVE_TAG (&tag_file, inquire->file);
3917 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3918 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3919 RESOLVE_TAG (&tag_exist, inquire->exist);
3920 RESOLVE_TAG (&tag_opened, inquire->opened);
3921 RESOLVE_TAG (&tag_number, inquire->number);
3922 RESOLVE_TAG (&tag_named, inquire->named);
3923 RESOLVE_TAG (&tag_name, inquire->name);
3924 RESOLVE_TAG (&tag_s_access, inquire->access);
3925 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3926 RESOLVE_TAG (&tag_direct, inquire->direct);
3927 RESOLVE_TAG (&tag_s_form, inquire->form);
3928 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3929 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3930 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3931 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3932 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3933 RESOLVE_TAG (&tag_s_position, inquire->position);
3934 RESOLVE_TAG (&tag_s_action, inquire->action);
3935 RESOLVE_TAG (&tag_read, inquire->read);
3936 RESOLVE_TAG (&tag_write, inquire->write);
3937 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3938 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3939 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3940 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3941 RESOLVE_TAG (&tag_s_round, inquire->round);
3942 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3943 RESOLVE_TAG (&tag_convert, inquire->convert);
3944 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3945 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3946 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3947 RESOLVE_TAG (&tag_s_round, inquire->round);
3948 RESOLVE_TAG (&tag_pending, inquire->pending);
3949 RESOLVE_TAG (&tag_size, inquire->size);
3950 RESOLVE_TAG (&tag_id, inquire->id);
3952 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3960 gfc_free_wait (gfc_wait *wait)
3965 gfc_free_expr (wait->unit);
3966 gfc_free_expr (wait->iostat);
3967 gfc_free_expr (wait->iomsg);
3968 gfc_free_expr (wait->id);
3973 gfc_resolve_wait (gfc_wait *wait)
3975 RESOLVE_TAG (&tag_unit, wait->unit);
3976 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3977 RESOLVE_TAG (&tag_iostat, wait->iostat);
3978 RESOLVE_TAG (&tag_id, wait->id);
3980 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3983 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3989 /* Match an element of a WAIT statement. */
3991 #define RETM if (m != MATCH_NO) return m;
3994 match_wait_element (gfc_wait *wait)
3998 m = match_etag (&tag_unit, &wait->unit);
3999 RETM m = match_ltag (&tag_err, &wait->err);
4000 RETM m = match_ltag (&tag_end, &wait->eor);
4001 RETM m = match_ltag (&tag_eor, &wait->end);
4002 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
4003 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
4004 RETM m = match_etag (&tag_id, &wait->id);
4005 RETM return MATCH_NO;
4012 gfc_match_wait (void)
4018 m = gfc_match_char ('(');
4022 wait = XCNEW (gfc_wait);
4024 loc = gfc_current_locus;
4026 m = match_wait_element (wait);
4027 if (m == MATCH_ERROR)
4031 m = gfc_match_expr (&wait->unit);
4032 if (m == MATCH_ERROR)
4040 if (gfc_match_char (')') == MATCH_YES)
4042 if (gfc_match_char (',') != MATCH_YES)
4045 m = match_wait_element (wait);
4046 if (m == MATCH_ERROR)
4052 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
4053 "not allowed in Fortran 95") == FAILURE)
4056 if (gfc_pure (NULL))
4058 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
4062 new_st.op = EXEC_WAIT;
4063 new_st.ext.wait = wait;
4068 gfc_syntax_error (ST_WAIT);
4071 gfc_free_wait (wait);