1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 Free Software Foundation, Inc.
5 Contributed by Andy Vaught
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
31 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
36 const char *name, *spec, *value;
42 tag_file = {"FILE", " file =", " %e", BT_CHARACTER },
43 tag_status = {"STATUS", " status =", " %e", BT_CHARACTER},
44 tag_e_access = {"ACCESS", " access =", " %e", BT_CHARACTER},
45 tag_e_form = {"FORM", " form =", " %e", BT_CHARACTER},
46 tag_e_recl = {"RECL", " recl =", " %e", BT_INTEGER},
47 tag_e_blank = {"BLANK", " blank =", " %e", BT_CHARACTER},
48 tag_e_position = {"POSITION", " position =", " %e", BT_CHARACTER},
49 tag_e_action = {"ACTION", " action =", " %e", BT_CHARACTER},
50 tag_e_delim = {"DELIM", " delim =", " %e", BT_CHARACTER},
51 tag_e_pad = {"PAD", " pad =", " %e", BT_CHARACTER},
52 tag_e_decimal = {"DECIMAL", " decimal =", " %e", BT_CHARACTER},
53 tag_e_encoding = {"ENCODING", " encoding =", " %e", BT_CHARACTER},
54 tag_e_async = {"ASYNCHRONOUS", " asynchronous =", " %e", BT_CHARACTER},
55 tag_e_round = {"ROUND", " round =", " %e", BT_CHARACTER},
56 tag_e_sign = {"SIGN", " sign =", " %e", BT_CHARACTER},
57 tag_unit = {"UNIT", " unit =", " %e", BT_INTEGER},
58 tag_advance = {"ADVANCE", " advance =", " %e", BT_CHARACTER},
59 tag_rec = {"REC", " rec =", " %e", BT_INTEGER},
60 tag_spos = {"POSITION", " pos =", " %e", BT_INTEGER},
61 tag_format = {"FORMAT", NULL, NULL, BT_CHARACTER},
62 tag_iomsg = {"IOMSG", " iomsg =", " %e", BT_CHARACTER},
63 tag_iostat = {"IOSTAT", " iostat =", " %v", BT_INTEGER},
64 tag_size = {"SIZE", " size =", " %v", BT_INTEGER},
65 tag_exist = {"EXIST", " exist =", " %v", BT_LOGICAL},
66 tag_opened = {"OPENED", " opened =", " %v", BT_LOGICAL},
67 tag_named = {"NAMED", " named =", " %v", BT_LOGICAL},
68 tag_name = {"NAME", " name =", " %v", BT_CHARACTER},
69 tag_number = {"NUMBER", " number =", " %v", BT_INTEGER},
70 tag_s_access = {"ACCESS", " access =", " %v", BT_CHARACTER},
71 tag_sequential = {"SEQUENTIAL", " sequential =", " %v", BT_CHARACTER},
72 tag_direct = {"DIRECT", " direct =", " %v", BT_CHARACTER},
73 tag_s_form = {"FORM", " form =", " %v", BT_CHARACTER},
74 tag_formatted = {"FORMATTED", " formatted =", " %v", BT_CHARACTER},
75 tag_unformatted = {"UNFORMATTED", " unformatted =", " %v", BT_CHARACTER},
76 tag_s_recl = {"RECL", " recl =", " %v", BT_INTEGER},
77 tag_nextrec = {"NEXTREC", " nextrec =", " %v", BT_INTEGER},
78 tag_s_blank = {"BLANK", " blank =", " %v", BT_CHARACTER},
79 tag_s_position = {"POSITION", " position =", " %v", BT_CHARACTER},
80 tag_s_action = {"ACTION", " action =", " %v", BT_CHARACTER},
81 tag_read = {"READ", " read =", " %v", BT_CHARACTER},
82 tag_write = {"WRITE", " write =", " %v", BT_CHARACTER},
83 tag_readwrite = {"READWRITE", " readwrite =", " %v", BT_CHARACTER},
84 tag_s_delim = {"DELIM", " delim =", " %v", BT_CHARACTER},
85 tag_s_pad = {"PAD", " pad =", " %v", BT_CHARACTER},
86 tag_s_decimal = {"DECIMAL", " decimal =", " %v", BT_CHARACTER},
87 tag_s_encoding = {"ENCODING", " encoding =", " %v", BT_CHARACTER},
88 tag_s_async = {"ASYNCHRONOUS", " asynchronous =", " %v", BT_CHARACTER},
89 tag_s_round = {"ROUND", " round =", " %v", BT_CHARACTER},
90 tag_s_sign = {"SIGN", " sign =", " %v", BT_CHARACTER},
91 tag_iolength = {"IOLENGTH", " iolength =", " %v", BT_INTEGER},
92 tag_convert = {"CONVERT", " convert =", " %e", BT_CHARACTER},
93 tag_strm_out = {"POS", " pos =", " %v", BT_INTEGER},
94 tag_err = {"ERR", " err =", " %l", BT_UNKNOWN},
95 tag_end = {"END", " end =", " %l", BT_UNKNOWN},
96 tag_eor = {"EOR", " eor =", " %l", BT_UNKNOWN},
97 tag_id = {"ID", " id =", " %v", BT_INTEGER},
98 tag_pending = {"PENDING", " pending =", " %v", BT_LOGICAL},
99 tag_newunit = {"NEWUNIT", " newunit =", " %v", BT_INTEGER};
101 static gfc_dt *current_dt;
103 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
106 /**************** Fortran 95 FORMAT parser *****************/
108 /* FORMAT tokens returned by format_lex(). */
111 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
112 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_LPAREN,
113 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
114 FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END,
115 FMT_ERROR, FMT_DC, FMT_DP, FMT_T, FMT_TR, FMT_TL, FMT_STAR, FMT_RC,
116 FMT_RD, FMT_RN, FMT_RP, FMT_RU, FMT_RZ
120 /* Local variables for checking format strings. The saved_token is
121 used to back up by a single format token during the parsing
123 static gfc_char_t *format_string;
124 static int format_string_pos;
125 static int format_length, use_last_char;
126 static char error_element;
127 static locus format_locus;
129 static format_token saved_token;
132 { MODE_STRING, MODE_FORMAT, MODE_COPY }
136 /* Return the next character in the format string. */
139 next_char (int in_string)
151 if (mode == MODE_STRING)
152 c = *format_string++;
155 c = gfc_next_char_literal (in_string);
160 if (gfc_option.flag_backslash && c == '\\')
162 locus old_locus = gfc_current_locus;
164 if (gfc_match_special_char (&c) == MATCH_NO)
165 gfc_current_locus = old_locus;
167 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
168 gfc_warning ("Extension: backslash character at %C");
171 if (mode == MODE_COPY)
172 *format_string++ = c;
174 if (mode != MODE_STRING)
175 format_locus = gfc_current_locus;
179 c = gfc_wide_toupper (c);
184 /* Back up one character position. Only works once. */
192 /* Eat up the spaces and return a character. */
195 next_char_not_space (bool *error)
200 error_element = c = next_char (0);
203 if (gfc_option.allow_std & GFC_STD_GNU)
204 gfc_warning ("Extension: Tab character in format at %C");
207 gfc_error ("Extension: Tab character in format at %C");
213 while (gfc_is_whitespace (c));
217 static int value = 0;
219 /* Simple lexical analyzer for getting the next token in a FORMAT
231 if (saved_token != FMT_NONE)
234 saved_token = FMT_NONE;
238 c = next_char_not_space (&error);
246 c = next_char_not_space (&error);
257 c = next_char_not_space (&error);
259 value = 10 * value + c - '0';
268 token = FMT_SIGNED_INT;
287 c = next_char_not_space (&error);
290 value = 10 * value + c - '0';
298 token = zflag ? FMT_ZERO : FMT_POSINT;
322 c = next_char_not_space (&error);
350 c = next_char_not_space (&error);
351 if (c != 'P' && c != 'S')
358 c = next_char_not_space (&error);
359 if (c == 'N' || c == 'Z')
420 c = next_char_not_space (&error);
450 c = next_char_not_space (&error);
453 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
454 "specifier not allowed at %C") == FAILURE)
460 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
461 "specifier not allowed at %C") == FAILURE)
473 c = next_char_not_space (&error);
522 token_to_string (format_token t)
541 /* Check a format statement. The format string, either from a FORMAT
542 statement or a constant in an I/O statement has already been parsed
543 by itself, and we are checking it for validity. The dual origin
544 means that the warning message is a little less than great. */
547 check_format (bool is_input)
549 const char *posint_required = _("Positive width required");
550 const char *nonneg_required = _("Nonnegative width required");
551 const char *unexpected_element = _("Unexpected element '%c' in format string"
553 const char *unexpected_end = _("Unexpected end of format string");
554 const char *zero_width = _("Zero width in format descriptor");
563 saved_token = FMT_NONE;
567 format_string_pos = 0;
574 error = _("Missing leading left parenthesis");
582 goto finished; /* Empty format is legal */
586 /* In this state, the next thing has to be a format item. */
603 error = _("Left parenthesis required after '*'");
628 /* Signed integer can only precede a P format. */
634 error = _("Expected P edit descriptor");
641 /* P requires a prior number. */
642 error = _("P descriptor requires leading scale factor");
646 /* X requires a prior number if we're being pedantic. */
647 if (mode != MODE_FORMAT)
648 format_locus.nextc += format_string_pos;
649 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
650 "requires leading space count at %L", &format_locus)
668 goto extension_optional_comma;
679 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %L",
680 &format_locus) == FAILURE)
682 if (t != FMT_RPAREN || level > 0)
684 gfc_warning ("$ should be the last specifier in format at %L",
686 goto optional_comma_1;
707 error = unexpected_end;
711 error = unexpected_element;
716 /* In this state, t must currently be a data descriptor.
717 Deal with things that can/must follow the descriptor. */
728 /* No comma after P allowed only for F, E, EN, ES, D, or G.
733 if (!(gfc_option.allow_std & GFC_STD_F2003) && t != FMT_COMMA
734 && t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES
735 && t != FMT_D && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
737 error = _("Comma required after P descriptor");
748 if (t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES && t != FMT_D
749 && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
751 error = _("Comma required after P descriptor");
765 error = _("Positive width required with T descriptor");
777 switch (gfc_notification_std (GFC_STD_GNU))
780 if (mode != MODE_FORMAT)
781 format_locus.nextc += format_string_pos;
782 gfc_warning ("Extension: Missing positive width after L "
783 "descriptor at %L", &format_locus);
788 error = posint_required;
819 if (t == FMT_G && u == FMT_ZERO)
826 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
827 "format at %L", &format_locus) == FAILURE)
838 error = posint_required;
844 error = _("E specifier not allowed with g0 descriptor");
853 format_locus.nextc += format_string_pos;
854 gfc_error ("Positive width required in format "
855 "specifier %s at %L", token_to_string (t),
866 /* Warn if -std=legacy, otherwise error. */
867 format_locus.nextc += format_string_pos;
868 if (gfc_option.warn_std != 0)
870 gfc_error ("Period required in format "
871 "specifier %s at %L", token_to_string (t),
877 gfc_warning ("Period required in format "
878 "specifier %s at %L", token_to_string (t),
880 /* If we go to finished, we need to unwind this
881 before the next round. */
882 format_locus.nextc -= format_string_pos;
890 if (u != FMT_ZERO && u != FMT_POSINT)
892 error = nonneg_required;
899 /* Look for optional exponent. */
914 error = _("Positive exponent width required");
925 if (t != FMT_ZERO && t != FMT_POSINT)
927 error = nonneg_required;
930 else if (is_input && t == FMT_ZERO)
932 error = posint_required;
941 /* Warn if -std=legacy, otherwise error. */
942 if (gfc_option.warn_std != 0)
944 error = _("Period required in format specifier");
947 if (mode != MODE_FORMAT)
948 format_locus.nextc += format_string_pos;
949 gfc_warning ("Period required in format specifier at %L",
958 if (t != FMT_ZERO && t != FMT_POSINT)
960 error = nonneg_required;
967 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
969 if (mode != MODE_FORMAT)
970 format_locus.nextc += format_string_pos;
971 gfc_warning ("The H format specifier at %L is"
972 " a Fortran 95 deleted feature", &format_locus);
974 if (mode == MODE_STRING)
976 format_string += value;
977 format_length -= value;
978 format_string_pos += repeat;
994 if (t != FMT_ZERO && t != FMT_POSINT)
996 error = nonneg_required;
999 else if (is_input && t == FMT_ZERO)
1001 error = posint_required;
1008 if (t != FMT_PERIOD)
1017 if (t != FMT_ZERO && t != FMT_POSINT)
1019 error = nonneg_required;
1027 error = unexpected_element;
1032 /* Between a descriptor and what comes next. */
1050 goto optional_comma;
1053 error = unexpected_end;
1057 if (mode != MODE_FORMAT)
1058 format_locus.nextc += format_string_pos - 1;
1059 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1060 &format_locus) == FAILURE)
1062 /* If we do not actually return a failure, we need to unwind this
1063 before the next round. */
1064 if (mode != MODE_FORMAT)
1065 format_locus.nextc -= format_string_pos;
1070 /* Optional comma is a weird between state where we've just finished
1071 reading a colon, slash, dollar or P descriptor. */
1088 /* Assume that we have another format item. */
1095 extension_optional_comma:
1096 /* As a GNU extension, permit a missing comma after a string literal. */
1113 goto optional_comma;
1116 error = unexpected_end;
1120 if (mode != MODE_FORMAT)
1121 format_locus.nextc += format_string_pos;
1122 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1123 &format_locus) == FAILURE)
1125 /* If we do not actually return a failure, we need to unwind this
1126 before the next round. */
1127 if (mode != MODE_FORMAT)
1128 format_locus.nextc -= format_string_pos;
1136 if (mode != MODE_FORMAT)
1137 format_locus.nextc += format_string_pos;
1138 if (error == unexpected_element)
1139 gfc_error (error, error_element, &format_locus);
1141 gfc_error ("%s in format string at %L", error, &format_locus);
1150 /* Given an expression node that is a constant string, see if it looks
1151 like a format string. */
1154 check_format_string (gfc_expr *e, bool is_input)
1158 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1162 format_string = e->value.character.string;
1164 /* More elaborate measures are needed to show where a problem is within a
1165 format string that has been calculated, but that's probably not worth the
1167 format_locus = e->where;
1168 rv = check_format (is_input);
1169 /* check for extraneous characters at the end of an otherwise valid format
1170 string, like '(A10,I3)F5'
1171 start at the end and move back to the last character processed,
1173 if (rv == SUCCESS && e->value.character.length > format_string_pos)
1174 for (i=e->value.character.length-1;i>format_string_pos-1;i--)
1175 if (e->value.character.string[i] != ' ')
1177 format_locus.nextc += format_length + 1;
1178 gfc_warning ("Extraneous characters in format at %L", &format_locus);
1185 /************ Fortran 95 I/O statement matchers *************/
1187 /* Match a FORMAT statement. This amounts to actually parsing the
1188 format descriptors in order to correctly locate the end of the
1192 gfc_match_format (void)
1197 if (gfc_current_ns->proc_name
1198 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1200 gfc_error ("Format statement in module main block at %C");
1204 if (gfc_statement_label == NULL)
1206 gfc_error ("Missing format label at %C");
1209 gfc_gobble_whitespace ();
1214 start = gfc_current_locus;
1216 if (check_format (false) == FAILURE)
1219 if (gfc_match_eos () != MATCH_YES)
1221 gfc_syntax_error (ST_FORMAT);
1225 /* The label doesn't get created until after the statement is done
1226 being matched, so we have to leave the string for later. */
1228 gfc_current_locus = start; /* Back to the beginning */
1231 new_st.op = EXEC_NOP;
1233 e = gfc_get_character_expr (gfc_default_character_kind, &start,
1234 NULL, format_length);
1235 format_string = e->value.character.string;
1236 gfc_statement_label->format = e;
1239 check_format (false); /* Guaranteed to succeed */
1240 gfc_match_eos (); /* Guaranteed to succeed */
1246 /* Match an expression I/O tag of some sort. */
1249 match_etag (const io_tag *tag, gfc_expr **v)
1254 m = gfc_match (tag->spec);
1258 m = gfc_match (tag->value, &result);
1261 gfc_error ("Invalid value for %s specification at %C", tag->name);
1267 gfc_error ("Duplicate %s specification at %C", tag->name);
1268 gfc_free_expr (result);
1277 /* Match a variable I/O tag of some sort. */
1280 match_vtag (const io_tag *tag, gfc_expr **v)
1285 m = gfc_match (tag->spec);
1289 m = gfc_match (tag->value, &result);
1292 gfc_error ("Invalid value for %s specification at %C", tag->name);
1298 gfc_error ("Duplicate %s specification at %C", tag->name);
1299 gfc_free_expr (result);
1303 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1305 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1306 gfc_free_expr (result);
1310 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1312 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1314 gfc_free_expr (result);
1323 /* Match I/O tags that cause variables to become redefined. */
1326 match_out_tag (const io_tag *tag, gfc_expr **result)
1330 m = match_vtag (tag, result);
1332 gfc_check_do_variable ((*result)->symtree);
1338 /* Match a label I/O tag. */
1341 match_ltag (const io_tag *tag, gfc_st_label ** label)
1347 m = gfc_match (tag->spec);
1351 m = gfc_match (tag->value, label);
1354 gfc_error ("Invalid value for %s specification at %C", tag->name);
1360 gfc_error ("Duplicate %s label specification at %C", tag->name);
1364 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1371 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1374 resolve_tag_format (const gfc_expr *e)
1376 if (e->expr_type == EXPR_CONSTANT
1377 && (e->ts.type != BT_CHARACTER
1378 || e->ts.kind != gfc_default_character_kind))
1380 gfc_error ("Constant expression in FORMAT tag at %L must be "
1381 "of type default CHARACTER", &e->where);
1385 /* If e's rank is zero and e is not an element of an array, it should be
1386 of integer or character type. The integer variable should be
1389 && (e->expr_type != EXPR_VARIABLE
1390 || e->symtree == NULL
1391 || e->symtree->n.sym->as == NULL
1392 || e->symtree->n.sym->as->rank == 0))
1394 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1396 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1400 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1402 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1403 "variable in FORMAT tag at %L", &e->where)
1406 if (e->symtree->n.sym->attr.assign != 1)
1408 gfc_error ("Variable '%s' at %L has not been assigned a "
1409 "format label", e->symtree->n.sym->name, &e->where);
1413 else if (e->ts.type == BT_INTEGER)
1415 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1416 "variable", gfc_basic_typename (e->ts.type), &e->where);
1423 /* If rank is nonzero and type is not character, we allow it under GFC_STD_LEGACY.
1424 It may be assigned an Hollerith constant. */
1425 if (e->ts.type != BT_CHARACTER)
1427 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1428 "in FORMAT tag at %L", &e->where) == FAILURE)
1431 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SHAPE)
1433 gfc_error ("Non-character assumed shape array element in FORMAT"
1434 " tag at %L", &e->where);
1438 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SIZE)
1440 gfc_error ("Non-character assumed size array element in FORMAT"
1441 " tag at %L", &e->where);
1445 if (e->rank == 0 && e->symtree->n.sym->attr.pointer)
1447 gfc_error ("Non-character pointer array element in FORMAT tag at %L",
1457 /* Do expression resolution and type-checking on an expression tag. */
1460 resolve_tag (const io_tag *tag, gfc_expr *e)
1465 if (gfc_resolve_expr (e) == FAILURE)
1468 if (tag == &tag_format)
1469 return resolve_tag_format (e);
1471 if (e->ts.type != tag->type)
1473 gfc_error ("%s tag at %L must be of type %s", tag->name,
1474 &e->where, gfc_basic_typename (tag->type));
1480 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1484 if (tag == &tag_iomsg)
1486 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1487 &e->where) == FAILURE)
1491 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1492 && e->ts.kind != gfc_default_integer_kind)
1494 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1495 "INTEGER in %s tag at %L", tag->name, &e->where)
1500 if (tag == &tag_convert)
1502 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1503 &e->where) == FAILURE)
1511 /* Match a single tag of an OPEN statement. */
1514 match_open_element (gfc_open *open)
1518 m = match_etag (&tag_e_async, &open->asynchronous);
1521 m = match_etag (&tag_unit, &open->unit);
1524 m = match_out_tag (&tag_iomsg, &open->iomsg);
1527 m = match_out_tag (&tag_iostat, &open->iostat);
1530 m = match_etag (&tag_file, &open->file);
1533 m = match_etag (&tag_status, &open->status);
1536 m = match_etag (&tag_e_access, &open->access);
1539 m = match_etag (&tag_e_form, &open->form);
1542 m = match_etag (&tag_e_recl, &open->recl);
1545 m = match_etag (&tag_e_blank, &open->blank);
1548 m = match_etag (&tag_e_position, &open->position);
1551 m = match_etag (&tag_e_action, &open->action);
1554 m = match_etag (&tag_e_delim, &open->delim);
1557 m = match_etag (&tag_e_pad, &open->pad);
1560 m = match_etag (&tag_e_decimal, &open->decimal);
1563 m = match_etag (&tag_e_encoding, &open->encoding);
1566 m = match_etag (&tag_e_round, &open->round);
1569 m = match_etag (&tag_e_sign, &open->sign);
1572 m = match_ltag (&tag_err, &open->err);
1575 m = match_etag (&tag_convert, &open->convert);
1578 m = match_out_tag (&tag_newunit, &open->newunit);
1586 /* Free the gfc_open structure and all the expressions it contains. */
1589 gfc_free_open (gfc_open *open)
1594 gfc_free_expr (open->unit);
1595 gfc_free_expr (open->iomsg);
1596 gfc_free_expr (open->iostat);
1597 gfc_free_expr (open->file);
1598 gfc_free_expr (open->status);
1599 gfc_free_expr (open->access);
1600 gfc_free_expr (open->form);
1601 gfc_free_expr (open->recl);
1602 gfc_free_expr (open->blank);
1603 gfc_free_expr (open->position);
1604 gfc_free_expr (open->action);
1605 gfc_free_expr (open->delim);
1606 gfc_free_expr (open->pad);
1607 gfc_free_expr (open->decimal);
1608 gfc_free_expr (open->encoding);
1609 gfc_free_expr (open->round);
1610 gfc_free_expr (open->sign);
1611 gfc_free_expr (open->convert);
1612 gfc_free_expr (open->asynchronous);
1613 gfc_free_expr (open->newunit);
1618 /* Resolve everything in a gfc_open structure. */
1621 gfc_resolve_open (gfc_open *open)
1624 RESOLVE_TAG (&tag_unit, open->unit);
1625 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1626 RESOLVE_TAG (&tag_iostat, open->iostat);
1627 RESOLVE_TAG (&tag_file, open->file);
1628 RESOLVE_TAG (&tag_status, open->status);
1629 RESOLVE_TAG (&tag_e_access, open->access);
1630 RESOLVE_TAG (&tag_e_form, open->form);
1631 RESOLVE_TAG (&tag_e_recl, open->recl);
1632 RESOLVE_TAG (&tag_e_blank, open->blank);
1633 RESOLVE_TAG (&tag_e_position, open->position);
1634 RESOLVE_TAG (&tag_e_action, open->action);
1635 RESOLVE_TAG (&tag_e_delim, open->delim);
1636 RESOLVE_TAG (&tag_e_pad, open->pad);
1637 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1638 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1639 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1640 RESOLVE_TAG (&tag_e_round, open->round);
1641 RESOLVE_TAG (&tag_e_sign, open->sign);
1642 RESOLVE_TAG (&tag_convert, open->convert);
1643 RESOLVE_TAG (&tag_newunit, open->newunit);
1645 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1652 /* Check if a given value for a SPECIFIER is either in the list of values
1653 allowed in F95 or F2003, issuing an error message and returning a zero
1654 value if it is not allowed. */
1657 compare_to_allowed_values (const char *specifier, const char *allowed[],
1658 const char *allowed_f2003[],
1659 const char *allowed_gnu[], gfc_char_t *value,
1660 const char *statement, bool warn)
1665 len = gfc_wide_strlen (value);
1668 for (len--; len > 0; len--)
1669 if (value[len] != ' ')
1674 for (i = 0; allowed[i]; i++)
1675 if (len == strlen (allowed[i])
1676 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1679 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1680 if (len == strlen (allowed_f2003[i])
1681 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1682 strlen (allowed_f2003[i])) == 0)
1684 notification n = gfc_notification_std (GFC_STD_F2003);
1686 if (n == WARNING || (warn && n == ERROR))
1688 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1689 "has value '%s'", specifier, statement,
1696 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1697 "%s statement at %C has value '%s'", specifier,
1698 statement, allowed_f2003[i]);
1706 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1707 if (len == strlen (allowed_gnu[i])
1708 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1709 strlen (allowed_gnu[i])) == 0)
1711 notification n = gfc_notification_std (GFC_STD_GNU);
1713 if (n == WARNING || (warn && n == ERROR))
1715 gfc_warning ("Extension: %s specifier in %s statement at %C "
1716 "has value '%s'", specifier, statement,
1723 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1724 "%s statement at %C has value '%s'", specifier,
1725 statement, allowed_gnu[i]);
1735 char *s = gfc_widechar_to_char (value, -1);
1736 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1737 specifier, statement, s);
1743 char *s = gfc_widechar_to_char (value, -1);
1744 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1745 specifier, statement, s);
1752 /* Match an OPEN statement. */
1755 gfc_match_open (void)
1761 m = gfc_match_char ('(');
1765 open = XCNEW (gfc_open);
1767 m = match_open_element (open);
1769 if (m == MATCH_ERROR)
1773 m = gfc_match_expr (&open->unit);
1774 if (m == MATCH_ERROR)
1780 if (gfc_match_char (')') == MATCH_YES)
1782 if (gfc_match_char (',') != MATCH_YES)
1785 m = match_open_element (open);
1786 if (m == MATCH_ERROR)
1792 if (gfc_match_eos () == MATCH_NO)
1795 if (gfc_pure (NULL))
1797 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1801 warn = (open->err || open->iostat) ? true : false;
1803 /* Checks on NEWUNIT specifier. */
1808 gfc_error ("UNIT specifier not allowed with NEWUNIT at %C");
1812 if (!(open->file || (open->status
1813 && gfc_wide_strncasecmp (open->status->value.character.string,
1814 "scratch", 7) == 0)))
1816 gfc_error ("NEWUNIT specifier must have FILE= "
1817 "or STATUS='scratch' at %C");
1821 else if (!open->unit)
1823 gfc_error ("OPEN statement at %C must have UNIT or NEWUNIT specified");
1827 /* Checks on the ACCESS specifier. */
1828 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1830 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1831 static const char *access_f2003[] = { "STREAM", NULL };
1832 static const char *access_gnu[] = { "APPEND", NULL };
1834 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1836 open->access->value.character.string,
1841 /* Checks on the ACTION specifier. */
1842 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1844 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1846 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1847 open->action->value.character.string,
1852 /* Checks on the ASYNCHRONOUS specifier. */
1853 if (open->asynchronous)
1855 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1856 "not allowed in Fortran 95") == FAILURE)
1859 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1861 static const char * asynchronous[] = { "YES", "NO", NULL };
1863 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1864 NULL, NULL, open->asynchronous->value.character.string,
1870 /* Checks on the BLANK specifier. */
1873 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1874 "not allowed in Fortran 95") == FAILURE)
1877 if (open->blank->expr_type == EXPR_CONSTANT)
1879 static const char *blank[] = { "ZERO", "NULL", NULL };
1881 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1882 open->blank->value.character.string,
1888 /* Checks on the DECIMAL specifier. */
1891 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1892 "not allowed in Fortran 95") == FAILURE)
1895 if (open->decimal->expr_type == EXPR_CONSTANT)
1897 static const char * decimal[] = { "COMMA", "POINT", NULL };
1899 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1900 open->decimal->value.character.string,
1906 /* Checks on the DELIM specifier. */
1909 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1910 "not allowed in Fortran 95") == FAILURE)
1913 if (open->delim->expr_type == EXPR_CONSTANT)
1915 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1917 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1918 open->delim->value.character.string,
1924 /* Checks on the ENCODING specifier. */
1927 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1928 "not allowed in Fortran 95") == FAILURE)
1931 if (open->encoding->expr_type == EXPR_CONSTANT)
1933 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1935 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1936 open->encoding->value.character.string,
1942 /* Checks on the FORM specifier. */
1943 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1945 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1947 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1948 open->form->value.character.string,
1953 /* Checks on the PAD specifier. */
1954 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1956 static const char *pad[] = { "YES", "NO", NULL };
1958 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1959 open->pad->value.character.string,
1964 /* Checks on the POSITION specifier. */
1965 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1967 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1969 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1970 open->position->value.character.string,
1975 /* Checks on the ROUND specifier. */
1978 if (gfc_notify_std (GFC_STD_F2003, "Fortran F2003: ROUND= at %C "
1979 "not allowed in Fortran 95") == FAILURE)
1982 if (open->round->expr_type == EXPR_CONSTANT)
1984 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1985 "COMPATIBLE", "PROCESSOR_DEFINED",
1988 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1989 open->round->value.character.string,
1995 /* Checks on the SIGN specifier. */
1998 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1999 "not allowed in Fortran 95") == FAILURE)
2002 if (open->sign->expr_type == EXPR_CONSTANT)
2004 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
2007 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
2008 open->sign->value.character.string,
2014 #define warn_or_error(...) \
2017 gfc_warning (__VA_ARGS__); \
2020 gfc_error (__VA_ARGS__); \
2025 /* Checks on the RECL specifier. */
2026 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
2027 && open->recl->ts.type == BT_INTEGER
2028 && mpz_sgn (open->recl->value.integer) != 1)
2030 warn_or_error ("RECL in OPEN statement at %C must be positive");
2033 /* Checks on the STATUS specifier. */
2034 if (open->status && open->status->expr_type == EXPR_CONSTANT)
2036 static const char *status[] = { "OLD", "NEW", "SCRATCH",
2037 "REPLACE", "UNKNOWN", NULL };
2039 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2040 open->status->value.character.string,
2044 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
2045 the FILE= specifier shall appear. */
2046 if (open->file == NULL
2047 && (gfc_wide_strncasecmp (open->status->value.character.string,
2049 || gfc_wide_strncasecmp (open->status->value.character.string,
2052 char *s = gfc_widechar_to_char (open->status->value.character.string,
2054 warn_or_error ("The STATUS specified in OPEN statement at %C is "
2055 "'%s' and no FILE specifier is present", s);
2059 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
2060 the FILE= specifier shall not appear. */
2061 if (gfc_wide_strncasecmp (open->status->value.character.string,
2062 "scratch", 7) == 0 && open->file)
2064 warn_or_error ("The STATUS specified in OPEN statement at %C "
2065 "cannot have the value SCRATCH if a FILE specifier "
2070 /* Things that are not allowed for unformatted I/O. */
2071 if (open->form && open->form->expr_type == EXPR_CONSTANT
2072 && (open->delim || open->decimal || open->encoding || open->round
2073 || open->sign || open->pad || open->blank)
2074 && gfc_wide_strncasecmp (open->form->value.character.string,
2075 "unformatted", 11) == 0)
2077 const char *spec = (open->delim ? "DELIM "
2078 : (open->pad ? "PAD " : open->blank
2081 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
2082 "unformatted I/O", spec);
2085 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
2086 && gfc_wide_strncasecmp (open->access->value.character.string,
2089 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
2094 && open->access && open->access->expr_type == EXPR_CONSTANT
2095 && !(gfc_wide_strncasecmp (open->access->value.character.string,
2096 "sequential", 10) == 0
2097 || gfc_wide_strncasecmp (open->access->value.character.string,
2099 || gfc_wide_strncasecmp (open->access->value.character.string,
2102 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
2103 "for stream or sequential ACCESS");
2106 #undef warn_or_error
2108 new_st.op = EXEC_OPEN;
2109 new_st.ext.open = open;
2113 gfc_syntax_error (ST_OPEN);
2116 gfc_free_open (open);
2121 /* Free a gfc_close structure an all its expressions. */
2124 gfc_free_close (gfc_close *close)
2129 gfc_free_expr (close->unit);
2130 gfc_free_expr (close->iomsg);
2131 gfc_free_expr (close->iostat);
2132 gfc_free_expr (close->status);
2137 /* Match elements of a CLOSE statement. */
2140 match_close_element (gfc_close *close)
2144 m = match_etag (&tag_unit, &close->unit);
2147 m = match_etag (&tag_status, &close->status);
2150 m = match_out_tag (&tag_iomsg, &close->iomsg);
2153 m = match_out_tag (&tag_iostat, &close->iostat);
2156 m = match_ltag (&tag_err, &close->err);
2164 /* Match a CLOSE statement. */
2167 gfc_match_close (void)
2173 m = gfc_match_char ('(');
2177 close = XCNEW (gfc_close);
2179 m = match_close_element (close);
2181 if (m == MATCH_ERROR)
2185 m = gfc_match_expr (&close->unit);
2188 if (m == MATCH_ERROR)
2194 if (gfc_match_char (')') == MATCH_YES)
2196 if (gfc_match_char (',') != MATCH_YES)
2199 m = match_close_element (close);
2200 if (m == MATCH_ERROR)
2206 if (gfc_match_eos () == MATCH_NO)
2209 if (gfc_pure (NULL))
2211 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2215 warn = (close->iostat || close->err) ? true : false;
2217 /* Checks on the STATUS specifier. */
2218 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2220 static const char *status[] = { "KEEP", "DELETE", NULL };
2222 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2223 close->status->value.character.string,
2228 new_st.op = EXEC_CLOSE;
2229 new_st.ext.close = close;
2233 gfc_syntax_error (ST_CLOSE);
2236 gfc_free_close (close);
2241 /* Resolve everything in a gfc_close structure. */
2244 gfc_resolve_close (gfc_close *close)
2246 RESOLVE_TAG (&tag_unit, close->unit);
2247 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2248 RESOLVE_TAG (&tag_iostat, close->iostat);
2249 RESOLVE_TAG (&tag_status, close->status);
2251 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2254 if (close->unit->expr_type == EXPR_CONSTANT
2255 && close->unit->ts.type == BT_INTEGER
2256 && mpz_sgn (close->unit->value.integer) < 0)
2258 gfc_error ("UNIT number in CLOSE statement at %L must be non-negative",
2259 &close->unit->where);
2266 /* Free a gfc_filepos structure. */
2269 gfc_free_filepos (gfc_filepos *fp)
2271 gfc_free_expr (fp->unit);
2272 gfc_free_expr (fp->iomsg);
2273 gfc_free_expr (fp->iostat);
2278 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2281 match_file_element (gfc_filepos *fp)
2285 m = match_etag (&tag_unit, &fp->unit);
2288 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2291 m = match_out_tag (&tag_iostat, &fp->iostat);
2294 m = match_ltag (&tag_err, &fp->err);
2302 /* Match the second half of the file-positioning statements, REWIND,
2303 BACKSPACE, ENDFILE, or the FLUSH statement. */
2306 match_filepos (gfc_statement st, gfc_exec_op op)
2311 fp = XCNEW (gfc_filepos);
2313 if (gfc_match_char ('(') == MATCH_NO)
2315 m = gfc_match_expr (&fp->unit);
2316 if (m == MATCH_ERROR)
2324 m = match_file_element (fp);
2325 if (m == MATCH_ERROR)
2329 m = gfc_match_expr (&fp->unit);
2330 if (m == MATCH_ERROR)
2338 if (gfc_match_char (')') == MATCH_YES)
2340 if (gfc_match_char (',') != MATCH_YES)
2343 m = match_file_element (fp);
2344 if (m == MATCH_ERROR)
2351 if (gfc_match_eos () != MATCH_YES)
2354 if (gfc_pure (NULL))
2356 gfc_error ("%s statement not allowed in PURE procedure at %C",
2357 gfc_ascii_statement (st));
2363 new_st.ext.filepos = fp;
2367 gfc_syntax_error (st);
2370 gfc_free_filepos (fp);
2376 gfc_resolve_filepos (gfc_filepos *fp)
2378 RESOLVE_TAG (&tag_unit, fp->unit);
2379 RESOLVE_TAG (&tag_iostat, fp->iostat);
2380 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2381 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2384 if (fp->unit->expr_type == EXPR_CONSTANT
2385 && fp->unit->ts.type == BT_INTEGER
2386 && mpz_sgn (fp->unit->value.integer) < 0)
2388 gfc_error ("UNIT number in statement at %L must be non-negative",
2396 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2397 and the FLUSH statement. */
2400 gfc_match_endfile (void)
2402 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2406 gfc_match_backspace (void)
2408 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2412 gfc_match_rewind (void)
2414 return match_filepos (ST_REWIND, EXEC_REWIND);
2418 gfc_match_flush (void)
2420 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2424 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2427 /******************** Data Transfer Statements *********************/
2429 /* Return a default unit number. */
2432 default_unit (io_kind k)
2441 return gfc_get_int_expr (gfc_default_integer_kind, NULL, unit);
2445 /* Match a unit specification for a data transfer statement. */
2448 match_dt_unit (io_kind k, gfc_dt *dt)
2452 if (gfc_match_char ('*') == MATCH_YES)
2454 if (dt->io_unit != NULL)
2457 dt->io_unit = default_unit (k);
2461 if (gfc_match_expr (&e) == MATCH_YES)
2463 if (dt->io_unit != NULL)
2476 gfc_error ("Duplicate UNIT specification at %C");
2481 /* Match a format specification. */
2484 match_dt_format (gfc_dt *dt)
2488 gfc_st_label *label;
2491 where = gfc_current_locus;
2493 if (gfc_match_char ('*') == MATCH_YES)
2495 if (dt->format_expr != NULL || dt->format_label != NULL)
2498 dt->format_label = &format_asterisk;
2502 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2504 if (dt->format_expr != NULL || dt->format_label != NULL)
2506 gfc_free_st_label (label);
2510 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2513 dt->format_label = label;
2516 else if (m == MATCH_ERROR)
2517 /* The label was zero or too large. Emit the correct diagnosis. */
2520 if (gfc_match_expr (&e) == MATCH_YES)
2522 if (dt->format_expr != NULL || dt->format_label != NULL)
2527 dt->format_expr = e;
2531 gfc_current_locus = where; /* The only case where we have to restore */
2536 gfc_error ("Duplicate format specification at %C");
2541 /* Traverse a namelist that is part of a READ statement to make sure
2542 that none of the variables in the namelist are INTENT(IN). Returns
2543 nonzero if we find such a variable. */
2546 check_namelist (gfc_symbol *sym)
2550 for (p = sym->namelist; p; p = p->next)
2551 if (p->sym->attr.intent == INTENT_IN)
2553 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2554 p->sym->name, sym->name);
2562 /* Match a single data transfer element. */
2565 match_dt_element (io_kind k, gfc_dt *dt)
2567 char name[GFC_MAX_SYMBOL_LEN + 1];
2571 if (gfc_match (" unit =") == MATCH_YES)
2573 m = match_dt_unit (k, dt);
2578 if (gfc_match (" fmt =") == MATCH_YES)
2580 m = match_dt_format (dt);
2585 if (gfc_match (" nml = %n", name) == MATCH_YES)
2587 if (dt->namelist != NULL)
2589 gfc_error ("Duplicate NML specification at %C");
2593 if (gfc_find_symbol (name, NULL, 1, &sym))
2596 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2598 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2599 sym != NULL ? sym->name : name);
2604 if (k == M_READ && check_namelist (sym))
2610 m = match_etag (&tag_e_async, &dt->asynchronous);
2613 m = match_etag (&tag_e_blank, &dt->blank);
2616 m = match_etag (&tag_e_delim, &dt->delim);
2619 m = match_etag (&tag_e_pad, &dt->pad);
2622 m = match_etag (&tag_e_sign, &dt->sign);
2625 m = match_etag (&tag_e_round, &dt->round);
2628 m = match_out_tag (&tag_id, &dt->id);
2631 m = match_etag (&tag_e_decimal, &dt->decimal);
2634 m = match_etag (&tag_rec, &dt->rec);
2637 m = match_etag (&tag_spos, &dt->pos);
2640 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2643 m = match_out_tag (&tag_iostat, &dt->iostat);
2646 m = match_ltag (&tag_err, &dt->err);
2648 dt->err_where = gfc_current_locus;
2651 m = match_etag (&tag_advance, &dt->advance);
2654 m = match_out_tag (&tag_size, &dt->size);
2658 m = match_ltag (&tag_end, &dt->end);
2663 gfc_error ("END tag at %C not allowed in output statement");
2666 dt->end_where = gfc_current_locus;
2671 m = match_ltag (&tag_eor, &dt->eor);
2673 dt->eor_where = gfc_current_locus;
2681 /* Free a data transfer structure and everything below it. */
2684 gfc_free_dt (gfc_dt *dt)
2689 gfc_free_expr (dt->io_unit);
2690 gfc_free_expr (dt->format_expr);
2691 gfc_free_expr (dt->rec);
2692 gfc_free_expr (dt->advance);
2693 gfc_free_expr (dt->iomsg);
2694 gfc_free_expr (dt->iostat);
2695 gfc_free_expr (dt->size);
2696 gfc_free_expr (dt->pad);
2697 gfc_free_expr (dt->delim);
2698 gfc_free_expr (dt->sign);
2699 gfc_free_expr (dt->round);
2700 gfc_free_expr (dt->blank);
2701 gfc_free_expr (dt->decimal);
2702 gfc_free_expr (dt->extra_comma);
2703 gfc_free_expr (dt->pos);
2708 /* Resolve everything in a gfc_dt structure. */
2711 gfc_resolve_dt (gfc_dt *dt, locus *loc)
2715 RESOLVE_TAG (&tag_format, dt->format_expr);
2716 RESOLVE_TAG (&tag_rec, dt->rec);
2717 RESOLVE_TAG (&tag_spos, dt->pos);
2718 RESOLVE_TAG (&tag_advance, dt->advance);
2719 RESOLVE_TAG (&tag_id, dt->id);
2720 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2721 RESOLVE_TAG (&tag_iostat, dt->iostat);
2722 RESOLVE_TAG (&tag_size, dt->size);
2723 RESOLVE_TAG (&tag_e_pad, dt->pad);
2724 RESOLVE_TAG (&tag_e_delim, dt->delim);
2725 RESOLVE_TAG (&tag_e_sign, dt->sign);
2726 RESOLVE_TAG (&tag_e_round, dt->round);
2727 RESOLVE_TAG (&tag_e_blank, dt->blank);
2728 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2729 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2734 gfc_error ("UNIT not specified at %L", loc);
2738 if (gfc_resolve_expr (e) == SUCCESS
2739 && (e->ts.type != BT_INTEGER
2740 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2742 /* If there is no extra comma signifying the "format" form of the IO
2743 statement, then this must be an error. */
2744 if (!dt->extra_comma)
2746 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2747 "or a CHARACTER variable", &e->where);
2752 /* At this point, we have an extra comma. If io_unit has arrived as
2753 type character, we assume its really the "format" form of the I/O
2754 statement. We set the io_unit to the default unit and format to
2755 the character expression. See F95 Standard section 9.4. */
2757 k = dt->extra_comma->value.iokind;
2758 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2760 dt->format_expr = dt->io_unit;
2761 dt->io_unit = default_unit (k);
2763 /* Free this pointer now so that a warning/error is not triggered
2764 below for the "Extension". */
2765 gfc_free_expr (dt->extra_comma);
2766 dt->extra_comma = NULL;
2771 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2772 &dt->extra_comma->where);
2778 if (e->ts.type == BT_CHARACTER)
2780 if (gfc_has_vector_index (e))
2782 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2787 if (e->rank && e->ts.type != BT_CHARACTER)
2789 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2793 if (e->expr_type == EXPR_CONSTANT && e->ts.type == BT_INTEGER
2794 && mpz_sgn (e->value.integer) < 0)
2796 gfc_error ("UNIT number in statement at %L must be non-negative", &e->where);
2801 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2802 "item list at %L", &dt->extra_comma->where) == FAILURE)
2807 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2809 if (dt->err->defined == ST_LABEL_UNKNOWN)
2811 gfc_error ("ERR tag label %d at %L not defined",
2812 dt->err->value, &dt->err_where);
2819 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2821 if (dt->end->defined == ST_LABEL_UNKNOWN)
2823 gfc_error ("END tag label %d at %L not defined",
2824 dt->end->value, &dt->end_where);
2831 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2833 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2835 gfc_error ("EOR tag label %d at %L not defined",
2836 dt->eor->value, &dt->eor_where);
2841 /* Check the format label actually exists. */
2842 if (dt->format_label && dt->format_label != &format_asterisk
2843 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2845 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2846 &dt->format_label->where);
2853 /* Given an io_kind, return its name. */
2856 io_kind_name (io_kind k)
2875 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2882 /* Match an IO iteration statement of the form:
2884 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2886 which is equivalent to a single IO element. This function is
2887 mutually recursive with match_io_element(). */
2889 static match match_io_element (io_kind, gfc_code **);
2892 match_io_iterator (io_kind k, gfc_code **result)
2894 gfc_code *head, *tail, *new_code;
2902 old_loc = gfc_current_locus;
2904 if (gfc_match_char ('(') != MATCH_YES)
2907 m = match_io_element (k, &head);
2910 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2916 /* Can't be anything but an IO iterator. Build a list. */
2917 iter = gfc_get_iterator ();
2921 m = gfc_match_iterator (iter, 0);
2922 if (m == MATCH_ERROR)
2926 gfc_check_do_variable (iter->var->symtree);
2930 m = match_io_element (k, &new_code);
2931 if (m == MATCH_ERROR)
2940 tail = gfc_append_code (tail, new_code);
2942 if (gfc_match_char (',') != MATCH_YES)
2951 if (gfc_match_char (')') != MATCH_YES)
2954 new_code = gfc_get_code ();
2955 new_code->op = EXEC_DO;
2956 new_code->ext.iterator = iter;
2958 new_code->block = gfc_get_code ();
2959 new_code->block->op = EXEC_DO;
2960 new_code->block->next = head;
2966 gfc_error ("Syntax error in I/O iterator at %C");
2970 gfc_free_iterator (iter, 1);
2971 gfc_free_statements (head);
2972 gfc_current_locus = old_loc;
2977 /* Match a single element of an IO list, which is either a single
2978 expression or an IO Iterator. */
2981 match_io_element (io_kind k, gfc_code **cpp)
2989 m = match_io_iterator (k, cpp);
2995 m = gfc_match_variable (&expr, 0);
2997 gfc_error ("Expected variable in READ statement at %C");
3001 m = gfc_match_expr (&expr);
3003 gfc_error ("Expected expression in %s statement at %C",
3011 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
3013 gfc_error ("Variable '%s' in input list at %C cannot be "
3014 "INTENT(IN)", expr->symtree->n.sym->name);
3019 && gfc_impure_variable (expr->symtree->n.sym)
3020 && current_dt->io_unit
3021 && current_dt->io_unit->ts.type == BT_CHARACTER)
3023 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
3024 expr->symtree->n.sym->name);
3028 if (gfc_check_do_variable (expr->symtree))
3034 if (current_dt->io_unit
3035 && current_dt->io_unit->ts.type == BT_CHARACTER
3037 && current_dt->io_unit->expr_type == EXPR_VARIABLE
3038 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
3040 gfc_error ("Cannot write to internal file unit '%s' at %C "
3041 "inside a PURE procedure",
3042 current_dt->io_unit->symtree->n.sym->name);
3054 gfc_free_expr (expr);
3058 cp = gfc_get_code ();
3059 cp->op = EXEC_TRANSFER;
3067 /* Match an I/O list, building gfc_code structures as we go. */
3070 match_io_list (io_kind k, gfc_code **head_p)
3072 gfc_code *head, *tail, *new_code;
3075 *head_p = head = tail = NULL;
3076 if (gfc_match_eos () == MATCH_YES)
3081 m = match_io_element (k, &new_code);
3082 if (m == MATCH_ERROR)
3087 tail = gfc_append_code (tail, new_code);
3091 if (gfc_match_eos () == MATCH_YES)
3093 if (gfc_match_char (',') != MATCH_YES)
3101 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3104 gfc_free_statements (head);
3109 /* Attach the data transfer end node. */
3112 terminate_io (gfc_code *io_code)
3116 if (io_code == NULL)
3117 io_code = new_st.block;
3119 c = gfc_get_code ();
3120 c->op = EXEC_DT_END;
3122 /* Point to structure that is already there */
3123 c->ext.dt = new_st.ext.dt;
3124 gfc_append_code (io_code, c);
3128 /* Check the constraints for a data transfer statement. The majority of the
3129 constraints appearing in 9.4 of the standard appear here. Some are handled
3130 in resolve_tag and others in gfc_resolve_dt. */
3133 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
3136 #define io_constraint(condition,msg,arg)\
3139 gfc_error(msg,arg);\
3145 gfc_symbol *sym = NULL;
3146 bool warn, unformatted;
3148 warn = (dt->err || dt->iostat) ? true : false;
3149 unformatted = dt->format_expr == NULL && dt->format_label == NULL
3150 && dt->namelist == NULL;
3155 if (expr && expr->expr_type == EXPR_VARIABLE
3156 && expr->ts.type == BT_CHARACTER)
3158 sym = expr->symtree->n.sym;
3160 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
3161 "Internal file at %L must not be INTENT(IN)",
3164 io_constraint (gfc_has_vector_index (dt->io_unit),
3165 "Internal file incompatible with vector subscript at %L",
3168 io_constraint (dt->rec != NULL,
3169 "REC tag at %L is incompatible with internal file",
3172 io_constraint (dt->pos != NULL,
3173 "POS tag at %L is incompatible with internal file",
3176 io_constraint (unformatted,
3177 "Unformatted I/O not allowed with internal unit at %L",
3178 &dt->io_unit->where);
3180 io_constraint (dt->asynchronous != NULL,
3181 "ASYNCHRONOUS tag at %L not allowed with internal file",
3182 &dt->asynchronous->where);
3184 if (dt->namelist != NULL)
3186 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
3187 "at %L with namelist", &expr->where)
3192 io_constraint (dt->advance != NULL,
3193 "ADVANCE tag at %L is incompatible with internal file",
3194 &dt->advance->where);
3197 if (expr && expr->ts.type != BT_CHARACTER)
3200 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
3201 "IO UNIT in %s statement at %C must be "
3202 "an internal file in a PURE procedure",
3208 io_constraint (dt->end, "END tag not allowed with output at %L",
3211 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
3214 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
3217 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
3220 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
3225 io_constraint (dt->size && dt->advance == NULL,
3226 "SIZE tag at %L requires an ADVANCE tag",
3229 io_constraint (dt->eor && dt->advance == NULL,
3230 "EOR tag at %L requires an ADVANCE tag",
3234 if (dt->asynchronous)
3236 static const char * asynchronous[] = { "YES", "NO", NULL };
3238 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
3240 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
3241 "expression", &dt->asynchronous->where);
3245 if (!compare_to_allowed_values
3246 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3247 dt->asynchronous->value.character.string,
3248 io_kind_name (k), warn))
3256 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3257 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3259 io_constraint (not_yes,
3260 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3261 "specifier", &dt->id->where);
3266 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3267 "not allowed in Fortran 95") == FAILURE)
3270 if (dt->decimal->expr_type == EXPR_CONSTANT)
3272 static const char * decimal[] = { "COMMA", "POINT", NULL };
3274 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3275 dt->decimal->value.character.string,
3276 io_kind_name (k), warn))
3279 io_constraint (unformatted,
3280 "the DECIMAL= specifier at %L must be with an "
3281 "explicit format expression", &dt->decimal->where);
3287 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3288 "not allowed in Fortran 95") == FAILURE)
3291 if (dt->blank->expr_type == EXPR_CONSTANT)
3293 static const char * blank[] = { "NULL", "ZERO", NULL };
3295 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3296 dt->blank->value.character.string,
3297 io_kind_name (k), warn))
3300 io_constraint (unformatted,
3301 "the BLANK= specifier at %L must be with an "
3302 "explicit format expression", &dt->blank->where);
3308 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3309 "not allowed in Fortran 95") == FAILURE)
3312 if (dt->pad->expr_type == EXPR_CONSTANT)
3314 static const char * pad[] = { "YES", "NO", NULL };
3316 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3317 dt->pad->value.character.string,
3318 io_kind_name (k), warn))
3321 io_constraint (unformatted,
3322 "the PAD= specifier at %L must be with an "
3323 "explicit format expression", &dt->pad->where);
3329 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3330 "not allowed in Fortran 95") == FAILURE)
3333 if (dt->round->expr_type == EXPR_CONSTANT)
3335 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3336 "COMPATIBLE", "PROCESSOR_DEFINED",
3339 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3340 dt->round->value.character.string,
3341 io_kind_name (k), warn))
3348 /* When implemented, change the following to use gfc_notify_std F2003.
3349 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3350 "not allowed in Fortran 95") == FAILURE)
3351 return MATCH_ERROR; */
3352 if (dt->sign->expr_type == EXPR_CONSTANT)
3354 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3357 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3358 dt->sign->value.character.string,
3359 io_kind_name (k), warn))
3362 io_constraint (unformatted,
3363 "SIGN= specifier at %L must be with an "
3364 "explicit format expression", &dt->sign->where);
3366 io_constraint (k == M_READ,
3367 "SIGN= specifier at %L not allowed in a "
3368 "READ statement", &dt->sign->where);
3374 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3375 "not allowed in Fortran 95") == FAILURE)
3378 if (dt->delim->expr_type == EXPR_CONSTANT)
3380 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3382 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3383 dt->delim->value.character.string,
3384 io_kind_name (k), warn))
3387 io_constraint (k == M_READ,
3388 "DELIM= specifier at %L not allowed in a "
3389 "READ statement", &dt->delim->where);
3391 io_constraint (dt->format_label != &format_asterisk
3392 && dt->namelist == NULL,
3393 "DELIM= specifier at %L must have FMT=*",
3396 io_constraint (unformatted && dt->namelist == NULL,
3397 "DELIM= specifier at %L must be with FMT=* or "
3398 "NML= specifier ", &dt->delim->where);
3404 io_constraint (io_code && dt->namelist,
3405 "NAMELIST cannot be followed by IO-list at %L",
3408 io_constraint (dt->format_expr,
3409 "IO spec-list cannot contain both NAMELIST group name "
3410 "and format specification at %L",
3411 &dt->format_expr->where);
3413 io_constraint (dt->format_label,
3414 "IO spec-list cannot contain both NAMELIST group name "
3415 "and format label at %L", spec_end);
3417 io_constraint (dt->rec,
3418 "NAMELIST IO is not allowed with a REC= specifier "
3419 "at %L", &dt->rec->where);
3421 io_constraint (dt->advance,
3422 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3423 "at %L", &dt->advance->where);
3428 io_constraint (dt->end,
3429 "An END tag is not allowed with a "
3430 "REC= specifier at %L", &dt->end_where);
3432 io_constraint (dt->format_label == &format_asterisk,
3433 "FMT=* is not allowed with a REC= specifier "
3436 io_constraint (dt->pos,
3437 "POS= is not allowed with REC= specifier "
3438 "at %L", &dt->pos->where);
3443 int not_yes, not_no;
3446 io_constraint (dt->format_label == &format_asterisk,
3447 "List directed format(*) is not allowed with a "
3448 "ADVANCE= specifier at %L.", &expr->where);
3450 io_constraint (unformatted,
3451 "the ADVANCE= specifier at %L must appear with an "
3452 "explicit format expression", &expr->where);
3454 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3456 const gfc_char_t *advance = expr->value.character.string;
3457 not_no = gfc_wide_strlen (advance) != 2
3458 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3459 not_yes = gfc_wide_strlen (advance) != 3
3460 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3468 io_constraint (not_no && not_yes,
3469 "ADVANCE= specifier at %L must have value = "
3470 "YES or NO.", &expr->where);
3472 io_constraint (dt->size && not_no && k == M_READ,
3473 "SIZE tag at %L requires an ADVANCE = 'NO'",
3476 io_constraint (dt->eor && not_no && k == M_READ,
3477 "EOR tag at %L requires an ADVANCE = 'NO'",
3481 expr = dt->format_expr;
3482 if (gfc_simplify_expr (expr, 0) == FAILURE
3483 || check_format_string (expr, k == M_READ) == FAILURE)
3488 #undef io_constraint
3491 /* Match a READ, WRITE or PRINT statement. */
3494 match_io (io_kind k)
3496 char name[GFC_MAX_SYMBOL_LEN + 1];
3505 where = gfc_current_locus;
3507 current_dt = dt = XCNEW (gfc_dt);
3508 m = gfc_match_char ('(');
3511 where = gfc_current_locus;
3514 else if (k == M_PRINT)
3516 /* Treat the non-standard case of PRINT namelist. */
3517 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3518 && gfc_match_name (name) == MATCH_YES)
3520 gfc_find_symbol (name, NULL, 1, &sym);
3521 if (sym && sym->attr.flavor == FL_NAMELIST)
3523 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3524 "%C is an extension") == FAILURE)
3530 dt->io_unit = default_unit (k);
3535 gfc_current_locus = where;
3539 if (gfc_current_form == FORM_FREE)
3541 char c = gfc_peek_ascii_char ();
3542 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3549 m = match_dt_format (dt);
3550 if (m == MATCH_ERROR)
3556 dt->io_unit = default_unit (k);
3561 /* Before issuing an error for a malformed 'print (1,*)' type of
3562 error, check for a default-char-expr of the form ('(I0)'). */
3563 if (k == M_PRINT && m == MATCH_YES)
3565 /* Reset current locus to get the initial '(' in an expression. */
3566 gfc_current_locus = where;
3567 dt->format_expr = NULL;
3568 m = match_dt_format (dt);
3570 if (m == MATCH_ERROR)
3572 if (m == MATCH_NO || dt->format_expr == NULL)
3576 dt->io_unit = default_unit (k);
3581 /* Match a control list */
3582 if (match_dt_element (k, dt) == MATCH_YES)
3584 if (match_dt_unit (k, dt) != MATCH_YES)
3587 if (gfc_match_char (')') == MATCH_YES)
3589 if (gfc_match_char (',') != MATCH_YES)
3592 m = match_dt_element (k, dt);
3595 if (m == MATCH_ERROR)
3598 m = match_dt_format (dt);
3601 if (m == MATCH_ERROR)
3604 where = gfc_current_locus;
3606 m = gfc_match_name (name);
3609 gfc_find_symbol (name, NULL, 1, &sym);
3610 if (sym && sym->attr.flavor == FL_NAMELIST)
3613 if (k == M_READ && check_namelist (sym))
3622 gfc_current_locus = where;
3624 goto loop; /* No matches, try regular elements */
3627 if (gfc_match_char (')') == MATCH_YES)
3629 if (gfc_match_char (',') != MATCH_YES)
3635 m = match_dt_element (k, dt);
3638 if (m == MATCH_ERROR)
3641 if (gfc_match_char (')') == MATCH_YES)
3643 if (gfc_match_char (',') != MATCH_YES)
3649 /* Used in check_io_constraints, where no locus is available. */
3650 spec_end = gfc_current_locus;
3652 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3653 to save the locus. This is used later when resolving transfer statements
3654 that might have a format expression without unit number. */
3655 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3657 /* Save the iokind and locus for later use in resolution. */
3658 dt->extra_comma = gfc_get_iokind_expr (&gfc_current_locus, k);
3662 if (gfc_match_eos () != MATCH_YES)
3664 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3666 gfc_error ("Expected comma in I/O list at %C");
3671 m = match_io_list (k, &io_code);
3672 if (m == MATCH_ERROR)
3678 /* A full IO statement has been matched. Check the constraints. spec_end is
3679 supplied for cases where no locus is supplied. */
3680 m = check_io_constraints (k, dt, io_code, &spec_end);
3682 if (m == MATCH_ERROR)
3685 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3687 new_st.block = gfc_get_code ();
3688 new_st.block->op = new_st.op;
3689 new_st.block->next = io_code;
3691 terminate_io (io_code);
3696 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3706 gfc_match_read (void)
3708 return match_io (M_READ);
3713 gfc_match_write (void)
3715 return match_io (M_WRITE);
3720 gfc_match_print (void)
3724 m = match_io (M_PRINT);
3728 if (gfc_pure (NULL))
3730 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3738 /* Free a gfc_inquire structure. */
3741 gfc_free_inquire (gfc_inquire *inquire)
3744 if (inquire == NULL)
3747 gfc_free_expr (inquire->unit);
3748 gfc_free_expr (inquire->file);
3749 gfc_free_expr (inquire->iomsg);
3750 gfc_free_expr (inquire->iostat);
3751 gfc_free_expr (inquire->exist);
3752 gfc_free_expr (inquire->opened);
3753 gfc_free_expr (inquire->number);
3754 gfc_free_expr (inquire->named);
3755 gfc_free_expr (inquire->name);
3756 gfc_free_expr (inquire->access);
3757 gfc_free_expr (inquire->sequential);
3758 gfc_free_expr (inquire->direct);
3759 gfc_free_expr (inquire->form);
3760 gfc_free_expr (inquire->formatted);
3761 gfc_free_expr (inquire->unformatted);
3762 gfc_free_expr (inquire->recl);
3763 gfc_free_expr (inquire->nextrec);
3764 gfc_free_expr (inquire->blank);
3765 gfc_free_expr (inquire->position);
3766 gfc_free_expr (inquire->action);
3767 gfc_free_expr (inquire->read);
3768 gfc_free_expr (inquire->write);
3769 gfc_free_expr (inquire->readwrite);
3770 gfc_free_expr (inquire->delim);
3771 gfc_free_expr (inquire->encoding);
3772 gfc_free_expr (inquire->pad);
3773 gfc_free_expr (inquire->iolength);
3774 gfc_free_expr (inquire->convert);
3775 gfc_free_expr (inquire->strm_pos);
3776 gfc_free_expr (inquire->asynchronous);
3777 gfc_free_expr (inquire->decimal);
3778 gfc_free_expr (inquire->pending);
3779 gfc_free_expr (inquire->id);
3780 gfc_free_expr (inquire->sign);
3781 gfc_free_expr (inquire->size);
3782 gfc_free_expr (inquire->round);
3787 /* Match an element of an INQUIRE statement. */
3789 #define RETM if (m != MATCH_NO) return m;
3792 match_inquire_element (gfc_inquire *inquire)
3796 m = match_etag (&tag_unit, &inquire->unit);
3797 RETM m = match_etag (&tag_file, &inquire->file);
3798 RETM m = match_ltag (&tag_err, &inquire->err);
3799 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3800 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3801 RETM m = match_vtag (&tag_exist, &inquire->exist);
3802 RETM m = match_vtag (&tag_opened, &inquire->opened);
3803 RETM m = match_vtag (&tag_named, &inquire->named);
3804 RETM m = match_vtag (&tag_name, &inquire->name);
3805 RETM m = match_out_tag (&tag_number, &inquire->number);
3806 RETM m = match_vtag (&tag_s_access, &inquire->access);
3807 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3808 RETM m = match_vtag (&tag_direct, &inquire->direct);
3809 RETM m = match_vtag (&tag_s_form, &inquire->form);
3810 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3811 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3812 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3813 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3814 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3815 RETM m = match_vtag (&tag_s_position, &inquire->position);
3816 RETM m = match_vtag (&tag_s_action, &inquire->action);
3817 RETM m = match_vtag (&tag_read, &inquire->read);
3818 RETM m = match_vtag (&tag_write, &inquire->write);
3819 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3820 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3821 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3822 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3823 RETM m = match_vtag (&tag_size, &inquire->size);
3824 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3825 RETM m = match_vtag (&tag_s_round, &inquire->round);
3826 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3827 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3828 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3829 RETM m = match_vtag (&tag_convert, &inquire->convert);
3830 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3831 RETM m = match_vtag (&tag_pending, &inquire->pending);
3832 RETM m = match_vtag (&tag_id, &inquire->id);
3833 RETM return MATCH_NO;
3840 gfc_match_inquire (void)
3842 gfc_inquire *inquire;
3847 m = gfc_match_char ('(');
3851 inquire = XCNEW (gfc_inquire);
3853 loc = gfc_current_locus;
3855 m = match_inquire_element (inquire);
3856 if (m == MATCH_ERROR)
3860 m = gfc_match_expr (&inquire->unit);
3861 if (m == MATCH_ERROR)
3867 /* See if we have the IOLENGTH form of the inquire statement. */
3868 if (inquire->iolength != NULL)
3870 if (gfc_match_char (')') != MATCH_YES)
3873 m = match_io_list (M_INQUIRE, &code);
3874 if (m == MATCH_ERROR)
3879 new_st.op = EXEC_IOLENGTH;
3880 new_st.expr1 = inquire->iolength;
3881 new_st.ext.inquire = inquire;
3883 if (gfc_pure (NULL))
3885 gfc_free_statements (code);
3886 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3890 new_st.block = gfc_get_code ();
3891 new_st.block->op = EXEC_IOLENGTH;
3892 terminate_io (code);
3893 new_st.block->next = code;
3897 /* At this point, we have the non-IOLENGTH inquire statement. */
3900 if (gfc_match_char (')') == MATCH_YES)
3902 if (gfc_match_char (',') != MATCH_YES)
3905 m = match_inquire_element (inquire);
3906 if (m == MATCH_ERROR)
3911 if (inquire->iolength != NULL)
3913 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3918 if (gfc_match_eos () != MATCH_YES)
3921 if (inquire->unit != NULL && inquire->file != NULL)
3923 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3924 "UNIT specifiers", &loc);
3928 if (inquire->unit == NULL && inquire->file == NULL)
3930 gfc_error ("INQUIRE statement at %L requires either FILE or "
3931 "UNIT specifier", &loc);
3935 if (gfc_pure (NULL))
3937 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3941 if (inquire->id != NULL && inquire->pending == NULL)
3943 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3944 "the ID= specifier", &loc);
3948 new_st.op = EXEC_INQUIRE;
3949 new_st.ext.inquire = inquire;
3953 gfc_syntax_error (ST_INQUIRE);
3956 gfc_free_inquire (inquire);
3961 /* Resolve everything in a gfc_inquire structure. */
3964 gfc_resolve_inquire (gfc_inquire *inquire)
3966 RESOLVE_TAG (&tag_unit, inquire->unit);
3967 RESOLVE_TAG (&tag_file, inquire->file);
3968 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3969 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3970 RESOLVE_TAG (&tag_exist, inquire->exist);
3971 RESOLVE_TAG (&tag_opened, inquire->opened);
3972 RESOLVE_TAG (&tag_number, inquire->number);
3973 RESOLVE_TAG (&tag_named, inquire->named);
3974 RESOLVE_TAG (&tag_name, inquire->name);
3975 RESOLVE_TAG (&tag_s_access, inquire->access);
3976 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3977 RESOLVE_TAG (&tag_direct, inquire->direct);
3978 RESOLVE_TAG (&tag_s_form, inquire->form);
3979 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3980 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3981 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3982 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3983 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3984 RESOLVE_TAG (&tag_s_position, inquire->position);
3985 RESOLVE_TAG (&tag_s_action, inquire->action);
3986 RESOLVE_TAG (&tag_read, inquire->read);
3987 RESOLVE_TAG (&tag_write, inquire->write);
3988 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3989 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3990 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3991 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3992 RESOLVE_TAG (&tag_s_round, inquire->round);
3993 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3994 RESOLVE_TAG (&tag_convert, inquire->convert);
3995 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3996 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3997 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3998 RESOLVE_TAG (&tag_s_round, inquire->round);
3999 RESOLVE_TAG (&tag_pending, inquire->pending);
4000 RESOLVE_TAG (&tag_size, inquire->size);
4001 RESOLVE_TAG (&tag_id, inquire->id);
4003 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
4011 gfc_free_wait (gfc_wait *wait)
4016 gfc_free_expr (wait->unit);
4017 gfc_free_expr (wait->iostat);
4018 gfc_free_expr (wait->iomsg);
4019 gfc_free_expr (wait->id);
4024 gfc_resolve_wait (gfc_wait *wait)
4026 RESOLVE_TAG (&tag_unit, wait->unit);
4027 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
4028 RESOLVE_TAG (&tag_iostat, wait->iostat);
4029 RESOLVE_TAG (&tag_id, wait->id);
4031 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
4034 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
4040 /* Match an element of a WAIT statement. */
4042 #define RETM if (m != MATCH_NO) return m;
4045 match_wait_element (gfc_wait *wait)
4049 m = match_etag (&tag_unit, &wait->unit);
4050 RETM m = match_ltag (&tag_err, &wait->err);
4051 RETM m = match_ltag (&tag_end, &wait->eor);
4052 RETM m = match_ltag (&tag_eor, &wait->end);
4053 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
4054 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
4055 RETM m = match_etag (&tag_id, &wait->id);
4056 RETM return MATCH_NO;
4063 gfc_match_wait (void)
4068 m = gfc_match_char ('(');
4072 wait = XCNEW (gfc_wait);
4074 m = match_wait_element (wait);
4075 if (m == MATCH_ERROR)
4079 m = gfc_match_expr (&wait->unit);
4080 if (m == MATCH_ERROR)
4088 if (gfc_match_char (')') == MATCH_YES)
4090 if (gfc_match_char (',') != MATCH_YES)
4093 m = match_wait_element (wait);
4094 if (m == MATCH_ERROR)
4100 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
4101 "not allowed in Fortran 95") == FAILURE)
4104 if (gfc_pure (NULL))
4106 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
4110 new_st.op = EXEC_WAIT;
4111 new_st.ext.wait = wait;
4116 gfc_syntax_error (ST_WAIT);
4119 gfc_free_wait (wait);