fortran/ PR fortran/23420 * io.c (resolve_tag): Don't allow non-CHARACTER constants as formats. (match_io): Fix usage of gfc_find_symbol. testsuite/ PR fortran/23420 * gfortran.dg/print_fmt_4.f: New. From-SVN: r104454
2630 lines
54 KiB
C
2630 lines
54 KiB
C
/* Deal with I/O statements & related stuff.
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Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation,
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Inc.
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Contributed by Andy Vaught
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "config.h"
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#include "system.h"
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#include "flags.h"
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#include "gfortran.h"
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#include "match.h"
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#include "parse.h"
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gfc_st_label format_asterisk =
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{ -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL, 0,
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{NULL, NULL}, NULL, NULL};
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typedef struct
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{
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const char *name, *spec;
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bt type;
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}
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io_tag;
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static const io_tag
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tag_file = { "FILE", " file = %e", BT_CHARACTER },
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tag_status = { "STATUS", " status = %e", BT_CHARACTER},
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tag_e_access = {"ACCESS", " access = %e", BT_CHARACTER},
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tag_e_form = {"FORM", " form = %e", BT_CHARACTER},
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tag_e_recl = {"RECL", " recl = %e", BT_INTEGER},
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tag_e_blank = {"BLANK", " blank = %e", BT_CHARACTER},
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tag_e_position = {"POSITION", " position = %e", BT_CHARACTER},
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tag_e_action = {"ACTION", " action = %e", BT_CHARACTER},
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tag_e_delim = {"DELIM", " delim = %e", BT_CHARACTER},
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tag_e_pad = {"PAD", " pad = %e", BT_CHARACTER},
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tag_unit = {"UNIT", " unit = %e", BT_INTEGER},
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tag_advance = {"ADVANCE", " advance = %e", BT_CHARACTER},
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tag_rec = {"REC", " rec = %e", BT_INTEGER},
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tag_format = {"FORMAT", NULL, BT_CHARACTER},
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tag_iomsg = {"IOMSG", " iomsg = %e", BT_CHARACTER},
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tag_iostat = {"IOSTAT", " iostat = %v", BT_INTEGER},
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tag_size = {"SIZE", " size = %v", BT_INTEGER},
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tag_exist = {"EXIST", " exist = %v", BT_LOGICAL},
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tag_opened = {"OPENED", " opened = %v", BT_LOGICAL},
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tag_named = {"NAMED", " named = %v", BT_LOGICAL},
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tag_name = {"NAME", " name = %v", BT_CHARACTER},
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tag_number = {"NUMBER", " number = %v", BT_INTEGER},
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tag_s_access = {"ACCESS", " access = %v", BT_CHARACTER},
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tag_sequential = {"SEQUENTIAL", " sequential = %v", BT_CHARACTER},
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tag_direct = {"DIRECT", " direct = %v", BT_CHARACTER},
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tag_s_form = {"FORM", " form = %v", BT_CHARACTER},
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tag_formatted = {"FORMATTED", " formatted = %v", BT_CHARACTER},
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tag_unformatted = {"UNFORMATTED", " unformatted = %v", BT_CHARACTER},
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tag_s_recl = {"RECL", " recl = %v", BT_INTEGER},
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tag_nextrec = {"NEXTREC", " nextrec = %v", BT_INTEGER},
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tag_s_blank = {"BLANK", " blank = %v", BT_CHARACTER},
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tag_s_position = {"POSITION", " position = %v", BT_CHARACTER},
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tag_s_action = {"ACTION", " action = %v", BT_CHARACTER},
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tag_read = {"READ", " read = %v", BT_CHARACTER},
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tag_write = {"WRITE", " write = %v", BT_CHARACTER},
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tag_readwrite = {"READWRITE", " readwrite = %v", BT_CHARACTER},
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tag_s_delim = {"DELIM", " delim = %v", BT_CHARACTER},
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tag_s_pad = {"PAD", " pad = %v", BT_CHARACTER},
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tag_iolength = {"IOLENGTH", " iolength = %v", BT_INTEGER},
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tag_err = {"ERR", " err = %l", BT_UNKNOWN},
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tag_end = {"END", " end = %l", BT_UNKNOWN},
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tag_eor = {"EOR", " eor = %l", BT_UNKNOWN};
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static gfc_dt *current_dt;
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#define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
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/**************** Fortran 95 FORMAT parser *****************/
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/* FORMAT tokens returned by format_lex(). */
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typedef enum
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{
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FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
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FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN,
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FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
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FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
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}
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format_token;
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/* Local variables for checking format strings. The saved_token is
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used to back up by a single format token during the parsing
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process. */
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static char *format_string;
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static int format_length, use_last_char;
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static format_token saved_token;
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static enum
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{ MODE_STRING, MODE_FORMAT, MODE_COPY }
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mode;
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/* Return the next character in the format string. */
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static char
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next_char (int in_string)
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{
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static char c;
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if (use_last_char)
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{
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use_last_char = 0;
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return c;
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}
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format_length++;
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if (mode == MODE_STRING)
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c = *format_string++;
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else
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{
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c = gfc_next_char_literal (in_string);
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if (c == '\n')
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c = '\0';
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if (mode == MODE_COPY)
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*format_string++ = c;
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}
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c = TOUPPER (c);
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return c;
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}
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/* Back up one character position. Only works once. */
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static void
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unget_char (void)
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{
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use_last_char = 1;
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}
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static int value = 0;
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/* Simple lexical analyzer for getting the next token in a FORMAT
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statement. */
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static format_token
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format_lex (void)
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{
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format_token token;
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char c, delim;
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int zflag;
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int negative_flag;
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if (saved_token != FMT_NONE)
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{
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token = saved_token;
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saved_token = FMT_NONE;
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return token;
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}
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do
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{
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c = next_char (0);
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}
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while (gfc_is_whitespace (c));
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negative_flag = 0;
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switch (c)
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{
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case '-':
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negative_flag = 1;
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case '+':
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c = next_char (0);
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if (!ISDIGIT (c))
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{
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token = FMT_UNKNOWN;
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break;
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}
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value = c - '0';
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do
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{
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c = next_char (0);
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if(ISDIGIT (c))
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value = 10 * value + c - '0';
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}
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while (ISDIGIT (c));
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unget_char ();
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if (negative_flag)
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value = -value;
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token = FMT_SIGNED_INT;
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break;
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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zflag = (c == '0');
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value = c - '0';
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do
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{
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c = next_char (0);
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if (c != '0')
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zflag = 0;
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if (ISDIGIT (c))
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value = 10 * value + c - '0';
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}
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while (ISDIGIT (c));
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unget_char ();
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token = zflag ? FMT_ZERO : FMT_POSINT;
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break;
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case '.':
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token = FMT_PERIOD;
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break;
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case ',':
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token = FMT_COMMA;
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break;
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case ':':
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token = FMT_COLON;
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break;
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case '/':
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token = FMT_SLASH;
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break;
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case '$':
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token = FMT_DOLLAR;
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break;
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case 'T':
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c = next_char (0);
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if (c != 'L' && c != 'R')
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unget_char ();
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token = FMT_POS;
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break;
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case '(':
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token = FMT_LPAREN;
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break;
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case ')':
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token = FMT_RPAREN;
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break;
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case 'X':
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token = FMT_X;
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break;
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case 'S':
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c = next_char (0);
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if (c != 'P' && c != 'S')
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unget_char ();
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token = FMT_SIGN;
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break;
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|
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|
case 'B':
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c = next_char (0);
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if (c == 'N' || c == 'Z')
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token = FMT_BLANK;
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else
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{
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unget_char ();
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token = FMT_IBOZ;
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}
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break;
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|
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case '\'':
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case '"':
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delim = c;
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value = 0;
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for (;;)
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{
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c = next_char (1);
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if (c == '\0')
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{
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token = FMT_END;
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break;
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}
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|
|
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if (c == delim)
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{
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c = next_char (1);
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|
|
|
if (c == '\0')
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{
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token = FMT_END;
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break;
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}
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|
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if (c != delim)
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{
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unget_char ();
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token = FMT_CHAR;
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break;
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}
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|
}
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value++;
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}
|
|
break;
|
|
|
|
case 'P':
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token = FMT_P;
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break;
|
|
|
|
case 'I':
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case 'O':
|
|
case 'Z':
|
|
token = FMT_IBOZ;
|
|
break;
|
|
|
|
case 'F':
|
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token = FMT_F;
|
|
break;
|
|
|
|
case 'E':
|
|
c = next_char (0);
|
|
if (c == 'N' || c == 'S')
|
|
token = FMT_EXT;
|
|
else
|
|
{
|
|
token = FMT_E;
|
|
unget_char ();
|
|
}
|
|
|
|
break;
|
|
|
|
case 'G':
|
|
token = FMT_G;
|
|
break;
|
|
|
|
case 'H':
|
|
token = FMT_H;
|
|
break;
|
|
|
|
case 'L':
|
|
token = FMT_L;
|
|
break;
|
|
|
|
case 'A':
|
|
token = FMT_A;
|
|
break;
|
|
|
|
case 'D':
|
|
token = FMT_D;
|
|
break;
|
|
|
|
case '\0':
|
|
token = FMT_END;
|
|
break;
|
|
|
|
default:
|
|
token = FMT_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
return token;
|
|
}
|
|
|
|
|
|
/* Check a format statement. The format string, either from a FORMAT
|
|
statement or a constant in an I/O statement has already been parsed
|
|
by itself, and we are checking it for validity. The dual origin
|
|
means that the warning message is a little less than great. */
|
|
|
|
static try
|
|
check_format (void)
|
|
{
|
|
const char *posint_required = _("Positive width required");
|
|
const char *period_required = _("Period required");
|
|
const char *nonneg_required = _("Nonnegative width required");
|
|
const char *unexpected_element = _("Unexpected element");
|
|
const char *unexpected_end = _("Unexpected end of format string");
|
|
|
|
const char *error;
|
|
format_token t, u;
|
|
int level;
|
|
int repeat;
|
|
try rv;
|
|
|
|
use_last_char = 0;
|
|
saved_token = FMT_NONE;
|
|
level = 0;
|
|
repeat = 0;
|
|
rv = SUCCESS;
|
|
|
|
t = format_lex ();
|
|
if (t != FMT_LPAREN)
|
|
{
|
|
error = _("Missing leading left parenthesis");
|
|
goto syntax;
|
|
}
|
|
|
|
t = format_lex ();
|
|
if (t == FMT_RPAREN)
|
|
goto finished; /* Empty format is legal */
|
|
saved_token = t;
|
|
|
|
format_item:
|
|
/* In this state, the next thing has to be a format item. */
|
|
t = format_lex ();
|
|
format_item_1:
|
|
switch (t)
|
|
{
|
|
case FMT_POSINT:
|
|
repeat = value;
|
|
t = format_lex ();
|
|
if (t == FMT_LPAREN)
|
|
{
|
|
level++;
|
|
goto format_item;
|
|
}
|
|
|
|
if (t == FMT_SLASH)
|
|
goto optional_comma;
|
|
|
|
goto data_desc;
|
|
|
|
case FMT_LPAREN:
|
|
level++;
|
|
goto format_item;
|
|
|
|
case FMT_SIGNED_INT:
|
|
/* Signed integer can only precede a P format. */
|
|
t = format_lex ();
|
|
if (t != FMT_P)
|
|
{
|
|
error = _("Expected P edit descriptor");
|
|
goto syntax;
|
|
}
|
|
|
|
goto data_desc;
|
|
|
|
case FMT_P:
|
|
/* P requires a prior number. */
|
|
error = _("P descriptor requires leading scale factor");
|
|
goto syntax;
|
|
|
|
case FMT_X:
|
|
/* X requires a prior number if we're being pedantic. */
|
|
if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
|
|
"requires leading space count at %C")
|
|
== FAILURE)
|
|
return FAILURE;
|
|
goto between_desc;
|
|
|
|
case FMT_SIGN:
|
|
case FMT_BLANK:
|
|
goto between_desc;
|
|
|
|
case FMT_CHAR:
|
|
goto extension_optional_comma;
|
|
|
|
case FMT_COLON:
|
|
case FMT_SLASH:
|
|
goto optional_comma;
|
|
|
|
case FMT_DOLLAR:
|
|
t = format_lex ();
|
|
|
|
if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
|
|
== FAILURE)
|
|
return FAILURE;
|
|
if (t != FMT_RPAREN || level > 0)
|
|
{
|
|
error = _("$ must be the last specifier");
|
|
goto syntax;
|
|
}
|
|
|
|
goto finished;
|
|
|
|
case FMT_POS:
|
|
case FMT_IBOZ:
|
|
case FMT_F:
|
|
case FMT_E:
|
|
case FMT_EXT:
|
|
case FMT_G:
|
|
case FMT_L:
|
|
case FMT_A:
|
|
case FMT_D:
|
|
goto data_desc;
|
|
|
|
case FMT_H:
|
|
goto data_desc;
|
|
|
|
case FMT_END:
|
|
error = unexpected_end;
|
|
goto syntax;
|
|
|
|
default:
|
|
error = unexpected_element;
|
|
goto syntax;
|
|
}
|
|
|
|
data_desc:
|
|
/* In this state, t must currently be a data descriptor.
|
|
Deal with things that can/must follow the descriptor. */
|
|
switch (t)
|
|
{
|
|
case FMT_SIGN:
|
|
case FMT_BLANK:
|
|
case FMT_X:
|
|
break;
|
|
|
|
case FMT_P:
|
|
if (pedantic)
|
|
{
|
|
t = format_lex ();
|
|
if (t == FMT_POSINT)
|
|
{
|
|
error = _("Repeat count cannot follow P descriptor");
|
|
goto syntax;
|
|
}
|
|
|
|
saved_token = t;
|
|
}
|
|
|
|
goto optional_comma;
|
|
|
|
case FMT_POS:
|
|
case FMT_L:
|
|
t = format_lex ();
|
|
if (t == FMT_POSINT)
|
|
break;
|
|
|
|
error = posint_required;
|
|
goto syntax;
|
|
|
|
case FMT_A:
|
|
t = format_lex ();
|
|
if (t != FMT_POSINT)
|
|
saved_token = t;
|
|
break;
|
|
|
|
case FMT_D:
|
|
case FMT_E:
|
|
case FMT_G:
|
|
case FMT_EXT:
|
|
u = format_lex ();
|
|
if (u != FMT_POSINT)
|
|
{
|
|
error = posint_required;
|
|
goto syntax;
|
|
}
|
|
|
|
u = format_lex ();
|
|
if (u != FMT_PERIOD)
|
|
{
|
|
error = period_required;
|
|
goto syntax;
|
|
}
|
|
|
|
u = format_lex ();
|
|
if (u != FMT_ZERO && u != FMT_POSINT)
|
|
{
|
|
error = nonneg_required;
|
|
goto syntax;
|
|
}
|
|
|
|
if (t == FMT_D)
|
|
break;
|
|
|
|
/* Look for optional exponent. */
|
|
u = format_lex ();
|
|
if (u != FMT_E)
|
|
{
|
|
saved_token = u;
|
|
}
|
|
else
|
|
{
|
|
u = format_lex ();
|
|
if (u != FMT_POSINT)
|
|
{
|
|
error = _("Positive exponent width required");
|
|
goto syntax;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case FMT_F:
|
|
t = format_lex ();
|
|
if (t != FMT_ZERO && t != FMT_POSINT)
|
|
{
|
|
error = nonneg_required;
|
|
goto syntax;
|
|
}
|
|
|
|
t = format_lex ();
|
|
if (t != FMT_PERIOD)
|
|
{
|
|
error = period_required;
|
|
goto syntax;
|
|
}
|
|
|
|
t = format_lex ();
|
|
if (t != FMT_ZERO && t != FMT_POSINT)
|
|
{
|
|
error = nonneg_required;
|
|
goto syntax;
|
|
}
|
|
|
|
break;
|
|
|
|
case FMT_H:
|
|
if(mode == MODE_STRING)
|
|
{
|
|
format_string += value;
|
|
format_length -= value;
|
|
}
|
|
else
|
|
{
|
|
while(repeat >0)
|
|
{
|
|
next_char(1);
|
|
repeat -- ;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FMT_IBOZ:
|
|
t = format_lex ();
|
|
if (t != FMT_ZERO && t != FMT_POSINT)
|
|
{
|
|
error = nonneg_required;
|
|
goto syntax;
|
|
}
|
|
|
|
t = format_lex ();
|
|
if (t != FMT_PERIOD)
|
|
{
|
|
saved_token = t;
|
|
}
|
|
else
|
|
{
|
|
t = format_lex ();
|
|
if (t != FMT_ZERO && t != FMT_POSINT)
|
|
{
|
|
error = nonneg_required;
|
|
goto syntax;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
error = unexpected_element;
|
|
goto syntax;
|
|
}
|
|
|
|
between_desc:
|
|
/* Between a descriptor and what comes next. */
|
|
t = format_lex ();
|
|
switch (t)
|
|
{
|
|
|
|
case FMT_COMMA:
|
|
goto format_item;
|
|
|
|
case FMT_RPAREN:
|
|
level--;
|
|
if (level < 0)
|
|
goto finished;
|
|
goto between_desc;
|
|
|
|
case FMT_COLON:
|
|
case FMT_SLASH:
|
|
goto optional_comma;
|
|
|
|
case FMT_END:
|
|
error = unexpected_end;
|
|
goto syntax;
|
|
|
|
default:
|
|
if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
|
|
== FAILURE)
|
|
return FAILURE;
|
|
goto format_item_1;
|
|
}
|
|
|
|
optional_comma:
|
|
/* Optional comma is a weird between state where we've just finished
|
|
reading a colon, slash or P descriptor. */
|
|
t = format_lex ();
|
|
switch (t)
|
|
{
|
|
case FMT_COMMA:
|
|
break;
|
|
|
|
case FMT_RPAREN:
|
|
level--;
|
|
if (level < 0)
|
|
goto finished;
|
|
goto between_desc;
|
|
|
|
default:
|
|
/* Assume that we have another format item. */
|
|
saved_token = t;
|
|
break;
|
|
}
|
|
|
|
goto format_item;
|
|
|
|
extension_optional_comma:
|
|
/* As a GNU extension, permit a missing comma after a string literal. */
|
|
t = format_lex ();
|
|
switch (t)
|
|
{
|
|
case FMT_COMMA:
|
|
break;
|
|
|
|
case FMT_RPAREN:
|
|
level--;
|
|
if (level < 0)
|
|
goto finished;
|
|
goto between_desc;
|
|
|
|
case FMT_COLON:
|
|
case FMT_SLASH:
|
|
goto optional_comma;
|
|
|
|
case FMT_END:
|
|
error = unexpected_end;
|
|
goto syntax;
|
|
|
|
default:
|
|
if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
|
|
== FAILURE)
|
|
return FAILURE;
|
|
saved_token = t;
|
|
break;
|
|
}
|
|
|
|
goto format_item;
|
|
|
|
syntax:
|
|
/* Something went wrong. If the format we're checking is a string,
|
|
generate a warning, since the program is correct. If the format
|
|
is in a FORMAT statement, this messes up parsing, which is an
|
|
error. */
|
|
if (mode != MODE_STRING)
|
|
gfc_error ("%s in format string at %C", error);
|
|
else
|
|
{
|
|
gfc_warning ("%s in format string at %C", error);
|
|
|
|
/* TODO: More elaborate measures are needed to show where a problem
|
|
is within a format string that has been calculated. */
|
|
}
|
|
|
|
rv = FAILURE;
|
|
|
|
finished:
|
|
return rv;
|
|
}
|
|
|
|
|
|
/* Given an expression node that is a constant string, see if it looks
|
|
like a format string. */
|
|
|
|
static void
|
|
check_format_string (gfc_expr * e)
|
|
{
|
|
|
|
mode = MODE_STRING;
|
|
format_string = e->value.character.string;
|
|
check_format ();
|
|
}
|
|
|
|
|
|
/************ Fortran 95 I/O statement matchers *************/
|
|
|
|
/* Match a FORMAT statement. This amounts to actually parsing the
|
|
format descriptors in order to correctly locate the end of the
|
|
format string. */
|
|
|
|
match
|
|
gfc_match_format (void)
|
|
{
|
|
gfc_expr *e;
|
|
locus start;
|
|
|
|
if (gfc_statement_label == NULL)
|
|
{
|
|
gfc_error ("Missing format label at %C");
|
|
return MATCH_ERROR;
|
|
}
|
|
gfc_gobble_whitespace ();
|
|
|
|
mode = MODE_FORMAT;
|
|
format_length = 0;
|
|
|
|
start = gfc_current_locus;
|
|
|
|
if (check_format () == FAILURE)
|
|
return MATCH_ERROR;
|
|
|
|
if (gfc_match_eos () != MATCH_YES)
|
|
{
|
|
gfc_syntax_error (ST_FORMAT);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
/* The label doesn't get created until after the statement is done
|
|
being matched, so we have to leave the string for later. */
|
|
|
|
gfc_current_locus = start; /* Back to the beginning */
|
|
|
|
new_st.loc = start;
|
|
new_st.op = EXEC_NOP;
|
|
|
|
e = gfc_get_expr();
|
|
e->expr_type = EXPR_CONSTANT;
|
|
e->ts.type = BT_CHARACTER;
|
|
e->ts.kind = gfc_default_character_kind;
|
|
e->where = start;
|
|
e->value.character.string = format_string = gfc_getmem(format_length+1);
|
|
e->value.character.length = format_length;
|
|
gfc_statement_label->format = e;
|
|
|
|
mode = MODE_COPY;
|
|
check_format (); /* Guaranteed to succeed */
|
|
gfc_match_eos (); /* Guaranteed to succeed */
|
|
|
|
return MATCH_YES;
|
|
}
|
|
|
|
|
|
/* Match an expression I/O tag of some sort. */
|
|
|
|
static match
|
|
match_etag (const io_tag * tag, gfc_expr ** v)
|
|
{
|
|
gfc_expr *result;
|
|
match m;
|
|
|
|
m = gfc_match (tag->spec, &result);
|
|
if (m != MATCH_YES)
|
|
return m;
|
|
|
|
if (*v != NULL)
|
|
{
|
|
gfc_error ("Duplicate %s specification at %C", tag->name);
|
|
gfc_free_expr (result);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
*v = result;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
|
|
/* Match a variable I/O tag of some sort. */
|
|
|
|
static match
|
|
match_vtag (const io_tag * tag, gfc_expr ** v)
|
|
{
|
|
gfc_expr *result;
|
|
match m;
|
|
|
|
m = gfc_match (tag->spec, &result);
|
|
if (m != MATCH_YES)
|
|
return m;
|
|
|
|
if (*v != NULL)
|
|
{
|
|
gfc_error ("Duplicate %s specification at %C", tag->name);
|
|
gfc_free_expr (result);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
if (result->symtree->n.sym->attr.intent == INTENT_IN)
|
|
{
|
|
gfc_error ("Variable tag cannot be INTENT(IN) at %C");
|
|
gfc_free_expr (result);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
|
|
{
|
|
gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
|
|
gfc_free_expr (result);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
*v = result;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
|
|
/* Match I/O tags that cause variables to become redefined. */
|
|
|
|
static match
|
|
match_out_tag(const io_tag *tag, gfc_expr **result)
|
|
{
|
|
match m;
|
|
|
|
m = match_vtag(tag, result);
|
|
if (m == MATCH_YES)
|
|
gfc_check_do_variable((*result)->symtree);
|
|
|
|
return m;
|
|
}
|
|
|
|
|
|
/* Match a label I/O tag. */
|
|
|
|
static match
|
|
match_ltag (const io_tag * tag, gfc_st_label ** label)
|
|
{
|
|
match m;
|
|
gfc_st_label *old;
|
|
|
|
old = *label;
|
|
m = gfc_match (tag->spec, label);
|
|
if (m == MATCH_YES && old != 0)
|
|
{
|
|
gfc_error ("Duplicate %s label specification at %C", tag->name);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
return m;
|
|
}
|
|
|
|
|
|
/* Do expression resolution and type-checking on an expression tag. */
|
|
|
|
static try
|
|
resolve_tag (const io_tag * tag, gfc_expr * e)
|
|
{
|
|
|
|
if (e == NULL)
|
|
return SUCCESS;
|
|
|
|
if (gfc_resolve_expr (e) == FAILURE)
|
|
return FAILURE;
|
|
|
|
if (e->ts.type != tag->type && tag != &tag_format)
|
|
{
|
|
gfc_error ("%s tag at %L must be of type %s", tag->name,
|
|
&e->where, gfc_basic_typename (tag->type));
|
|
return FAILURE;
|
|
}
|
|
|
|
if (tag == &tag_format)
|
|
{
|
|
if (e->expr_type == EXPR_CONSTANT
|
|
&& (e->ts.type != BT_CHARACTER
|
|
|| e->ts.kind != gfc_default_character_kind))
|
|
{
|
|
gfc_error ("Constant expression in FORMAT tag at %L must be "
|
|
"of type default CHARACTER", &e->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
/* If e's rank is zero and e is not an element of an array, it should be
|
|
of integer or character type. The integer variable should be
|
|
ASSIGNED. */
|
|
if (e->symtree == NULL || e->symtree->n.sym->as == NULL
|
|
|| e->symtree->n.sym->as->rank == 0)
|
|
{
|
|
if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
|
|
{
|
|
gfc_error ("%s tag at %L must be of type %s or %s", tag->name,
|
|
&e->where, gfc_basic_typename (BT_CHARACTER),
|
|
gfc_basic_typename (BT_INTEGER));
|
|
return FAILURE;
|
|
}
|
|
else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
|
|
{
|
|
if (gfc_notify_std (GFC_STD_F95_DEL,
|
|
"Obsolete: ASSIGNED variable in FORMAT tag at %L",
|
|
&e->where) == FAILURE)
|
|
return FAILURE;
|
|
if (e->symtree->n.sym->attr.assign != 1)
|
|
{
|
|
gfc_error ("Variable '%s' at %L has not been assigned a "
|
|
"format label", e->symtree->n.sym->name, &e->where);
|
|
return FAILURE;
|
|
}
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
/* if rank is nonzero, we allow the type to be character under
|
|
GFC_STD_GNU and other type under GFC_STD_LEGACY. It may be
|
|
assigned an Hollerith constant. */
|
|
if (e->ts.type == BT_CHARACTER)
|
|
{
|
|
if (gfc_notify_std (GFC_STD_GNU,
|
|
"Extension: Character array in FORMAT tag at %L",
|
|
&e->where) == FAILURE)
|
|
return FAILURE;
|
|
}
|
|
else
|
|
{
|
|
if (gfc_notify_std (GFC_STD_LEGACY,
|
|
"Extension: Non-character in FORMAT tag at %L",
|
|
&e->where) == FAILURE)
|
|
return FAILURE;
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (e->rank != 0)
|
|
{
|
|
gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
|
|
return FAILURE;
|
|
}
|
|
if (tag == &tag_iomsg)
|
|
{
|
|
if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
|
|
&e->where) == FAILURE)
|
|
return FAILURE;
|
|
}
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/* Match a single tag of an OPEN statement. */
|
|
|
|
static match
|
|
match_open_element (gfc_open * open)
|
|
{
|
|
match m;
|
|
|
|
m = match_etag (&tag_unit, &open->unit);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iomsg, &open->iomsg);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iostat, &open->iostat);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_file, &open->file);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_status, &open->status);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_access, &open->access);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_form, &open->form);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_recl, &open->recl);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_blank, &open->blank);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_position, &open->position);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_action, &open->action);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_delim, &open->delim);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_e_pad, &open->pad);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_ltag (&tag_err, &open->err);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
return MATCH_NO;
|
|
}
|
|
|
|
|
|
/* Free the gfc_open structure and all the expressions it contains. */
|
|
|
|
void
|
|
gfc_free_open (gfc_open * open)
|
|
{
|
|
|
|
if (open == NULL)
|
|
return;
|
|
|
|
gfc_free_expr (open->unit);
|
|
gfc_free_expr (open->iomsg);
|
|
gfc_free_expr (open->iostat);
|
|
gfc_free_expr (open->file);
|
|
gfc_free_expr (open->status);
|
|
gfc_free_expr (open->access);
|
|
gfc_free_expr (open->form);
|
|
gfc_free_expr (open->recl);
|
|
gfc_free_expr (open->blank);
|
|
gfc_free_expr (open->position);
|
|
gfc_free_expr (open->action);
|
|
gfc_free_expr (open->delim);
|
|
gfc_free_expr (open->pad);
|
|
|
|
gfc_free (open);
|
|
}
|
|
|
|
|
|
/* Resolve everything in a gfc_open structure. */
|
|
|
|
try
|
|
gfc_resolve_open (gfc_open * open)
|
|
{
|
|
|
|
RESOLVE_TAG (&tag_unit, open->unit);
|
|
RESOLVE_TAG (&tag_iomsg, open->iomsg);
|
|
RESOLVE_TAG (&tag_iostat, open->iostat);
|
|
RESOLVE_TAG (&tag_file, open->file);
|
|
RESOLVE_TAG (&tag_status, open->status);
|
|
RESOLVE_TAG (&tag_e_form, open->form);
|
|
RESOLVE_TAG (&tag_e_recl, open->recl);
|
|
|
|
RESOLVE_TAG (&tag_e_blank, open->blank);
|
|
RESOLVE_TAG (&tag_e_position, open->position);
|
|
RESOLVE_TAG (&tag_e_action, open->action);
|
|
RESOLVE_TAG (&tag_e_delim, open->delim);
|
|
RESOLVE_TAG (&tag_e_pad, open->pad);
|
|
|
|
if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/* Match an OPEN statement. */
|
|
|
|
match
|
|
gfc_match_open (void)
|
|
{
|
|
gfc_open *open;
|
|
match m;
|
|
|
|
m = gfc_match_char ('(');
|
|
if (m == MATCH_NO)
|
|
return m;
|
|
|
|
open = gfc_getmem (sizeof (gfc_open));
|
|
|
|
m = match_open_element (open);
|
|
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
{
|
|
m = gfc_match_expr (&open->unit);
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_open_element (open);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
if (gfc_match_eos () == MATCH_NO)
|
|
goto syntax;
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_error ("OPEN statement not allowed in PURE procedure at %C");
|
|
goto cleanup;
|
|
}
|
|
|
|
new_st.op = EXEC_OPEN;
|
|
new_st.ext.open = open;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_syntax_error (ST_OPEN);
|
|
|
|
cleanup:
|
|
gfc_free_open (open);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Free a gfc_close structure an all its expressions. */
|
|
|
|
void
|
|
gfc_free_close (gfc_close * close)
|
|
{
|
|
|
|
if (close == NULL)
|
|
return;
|
|
|
|
gfc_free_expr (close->unit);
|
|
gfc_free_expr (close->iomsg);
|
|
gfc_free_expr (close->iostat);
|
|
gfc_free_expr (close->status);
|
|
|
|
gfc_free (close);
|
|
}
|
|
|
|
|
|
/* Match elements of a CLOSE statement. */
|
|
|
|
static match
|
|
match_close_element (gfc_close * close)
|
|
{
|
|
match m;
|
|
|
|
m = match_etag (&tag_unit, &close->unit);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_status, &close->status);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iomsg, &close->iomsg);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iostat, &close->iostat);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_ltag (&tag_err, &close->err);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
return MATCH_NO;
|
|
}
|
|
|
|
|
|
/* Match a CLOSE statement. */
|
|
|
|
match
|
|
gfc_match_close (void)
|
|
{
|
|
gfc_close *close;
|
|
match m;
|
|
|
|
m = gfc_match_char ('(');
|
|
if (m == MATCH_NO)
|
|
return m;
|
|
|
|
close = gfc_getmem (sizeof (gfc_close));
|
|
|
|
m = match_close_element (close);
|
|
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
{
|
|
m = gfc_match_expr (&close->unit);
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_close_element (close);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
if (gfc_match_eos () == MATCH_NO)
|
|
goto syntax;
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
|
|
goto cleanup;
|
|
}
|
|
|
|
new_st.op = EXEC_CLOSE;
|
|
new_st.ext.close = close;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_syntax_error (ST_CLOSE);
|
|
|
|
cleanup:
|
|
gfc_free_close (close);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Resolve everything in a gfc_close structure. */
|
|
|
|
try
|
|
gfc_resolve_close (gfc_close * close)
|
|
{
|
|
|
|
RESOLVE_TAG (&tag_unit, close->unit);
|
|
RESOLVE_TAG (&tag_iomsg, close->iomsg);
|
|
RESOLVE_TAG (&tag_iostat, close->iostat);
|
|
RESOLVE_TAG (&tag_status, close->status);
|
|
|
|
if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/* Free a gfc_filepos structure. */
|
|
|
|
void
|
|
gfc_free_filepos (gfc_filepos * fp)
|
|
{
|
|
|
|
gfc_free_expr (fp->unit);
|
|
gfc_free_expr (fp->iomsg);
|
|
gfc_free_expr (fp->iostat);
|
|
gfc_free (fp);
|
|
}
|
|
|
|
|
|
/* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
|
|
|
|
static match
|
|
match_file_element (gfc_filepos * fp)
|
|
{
|
|
match m;
|
|
|
|
m = match_etag (&tag_unit, &fp->unit);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iomsg, &fp->iomsg);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iostat, &fp->iostat);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_ltag (&tag_err, &fp->err);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
return MATCH_NO;
|
|
}
|
|
|
|
|
|
/* Match the second half of the file-positioning statements, REWIND,
|
|
BACKSPACE, ENDFILE, or the FLUSH statement. */
|
|
|
|
static match
|
|
match_filepos (gfc_statement st, gfc_exec_op op)
|
|
{
|
|
gfc_filepos *fp;
|
|
match m;
|
|
|
|
fp = gfc_getmem (sizeof (gfc_filepos));
|
|
|
|
if (gfc_match_char ('(') == MATCH_NO)
|
|
{
|
|
m = gfc_match_expr (&fp->unit);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
|
|
goto done;
|
|
}
|
|
|
|
m = match_file_element (fp);
|
|
if (m == MATCH_ERROR)
|
|
goto done;
|
|
if (m == MATCH_NO)
|
|
{
|
|
m = gfc_match_expr (&fp->unit);
|
|
if (m == MATCH_ERROR)
|
|
goto done;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_file_element (fp);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
done:
|
|
if (gfc_match_eos () != MATCH_YES)
|
|
goto syntax;
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_error ("%s statement not allowed in PURE procedure at %C",
|
|
gfc_ascii_statement (st));
|
|
|
|
goto cleanup;
|
|
}
|
|
|
|
new_st.op = op;
|
|
new_st.ext.filepos = fp;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_syntax_error (st);
|
|
|
|
cleanup:
|
|
gfc_free_filepos (fp);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
try
|
|
gfc_resolve_filepos (gfc_filepos * fp)
|
|
{
|
|
|
|
RESOLVE_TAG (&tag_unit, fp->unit);
|
|
RESOLVE_TAG (&tag_iostat, fp->iostat);
|
|
RESOLVE_TAG (&tag_iomsg, fp->iomsg);
|
|
if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
|
|
and the FLUSH statement. */
|
|
|
|
match
|
|
gfc_match_endfile (void)
|
|
{
|
|
|
|
return match_filepos (ST_END_FILE, EXEC_ENDFILE);
|
|
}
|
|
|
|
match
|
|
gfc_match_backspace (void)
|
|
{
|
|
|
|
return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
|
|
}
|
|
|
|
match
|
|
gfc_match_rewind (void)
|
|
{
|
|
|
|
return match_filepos (ST_REWIND, EXEC_REWIND);
|
|
}
|
|
|
|
match
|
|
gfc_match_flush (void)
|
|
{
|
|
if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C") == FAILURE)
|
|
return MATCH_ERROR;
|
|
|
|
return match_filepos (ST_FLUSH, EXEC_FLUSH);
|
|
}
|
|
|
|
/******************** Data Transfer Statements *********************/
|
|
|
|
typedef enum
|
|
{ M_READ, M_WRITE, M_PRINT, M_INQUIRE }
|
|
io_kind;
|
|
|
|
|
|
/* Return a default unit number. */
|
|
|
|
static gfc_expr *
|
|
default_unit (io_kind k)
|
|
{
|
|
int unit;
|
|
|
|
if (k == M_READ)
|
|
unit = 5;
|
|
else
|
|
unit = 6;
|
|
|
|
return gfc_int_expr (unit);
|
|
}
|
|
|
|
|
|
/* Match a unit specification for a data transfer statement. */
|
|
|
|
static match
|
|
match_dt_unit (io_kind k, gfc_dt * dt)
|
|
{
|
|
gfc_expr *e;
|
|
|
|
if (gfc_match_char ('*') == MATCH_YES)
|
|
{
|
|
if (dt->io_unit != NULL)
|
|
goto conflict;
|
|
|
|
dt->io_unit = default_unit (k);
|
|
return MATCH_YES;
|
|
}
|
|
|
|
if (gfc_match_expr (&e) == MATCH_YES)
|
|
{
|
|
if (dt->io_unit != NULL)
|
|
{
|
|
gfc_free_expr (e);
|
|
goto conflict;
|
|
}
|
|
|
|
dt->io_unit = e;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
return MATCH_NO;
|
|
|
|
conflict:
|
|
gfc_error ("Duplicate UNIT specification at %C");
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Match a format specification. */
|
|
|
|
static match
|
|
match_dt_format (gfc_dt * dt)
|
|
{
|
|
locus where;
|
|
gfc_expr *e;
|
|
gfc_st_label *label;
|
|
|
|
where = gfc_current_locus;
|
|
|
|
if (gfc_match_char ('*') == MATCH_YES)
|
|
{
|
|
if (dt->format_expr != NULL || dt->format_label != NULL)
|
|
goto conflict;
|
|
|
|
dt->format_label = &format_asterisk;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
if (gfc_match_st_label (&label, 0) == MATCH_YES)
|
|
{
|
|
if (dt->format_expr != NULL || dt->format_label != NULL)
|
|
{
|
|
gfc_free_st_label (label);
|
|
goto conflict;
|
|
}
|
|
|
|
if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
|
|
return MATCH_ERROR;
|
|
|
|
dt->format_label = label;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
if (gfc_match_expr (&e) == MATCH_YES)
|
|
{
|
|
if (dt->format_expr != NULL || dt->format_label != NULL)
|
|
{
|
|
gfc_free_expr (e);
|
|
goto conflict;
|
|
}
|
|
dt->format_expr = e;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
gfc_current_locus = where; /* The only case where we have to restore */
|
|
|
|
return MATCH_NO;
|
|
|
|
conflict:
|
|
gfc_error ("Duplicate format specification at %C");
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Traverse a namelist that is part of a READ statement to make sure
|
|
that none of the variables in the namelist are INTENT(IN). Returns
|
|
nonzero if we find such a variable. */
|
|
|
|
static int
|
|
check_namelist (gfc_symbol * sym)
|
|
{
|
|
gfc_namelist *p;
|
|
|
|
for (p = sym->namelist; p; p = p->next)
|
|
if (p->sym->attr.intent == INTENT_IN)
|
|
{
|
|
gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
|
|
p->sym->name, sym->name);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Match a single data transfer element. */
|
|
|
|
static match
|
|
match_dt_element (io_kind k, gfc_dt * dt)
|
|
{
|
|
char name[GFC_MAX_SYMBOL_LEN + 1];
|
|
gfc_symbol *sym;
|
|
match m;
|
|
|
|
if (gfc_match (" unit =") == MATCH_YES)
|
|
{
|
|
m = match_dt_unit (k, dt);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
}
|
|
|
|
if (gfc_match (" fmt =") == MATCH_YES)
|
|
{
|
|
m = match_dt_format (dt);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
}
|
|
|
|
if (gfc_match (" nml = %n", name) == MATCH_YES)
|
|
{
|
|
if (dt->namelist != NULL)
|
|
{
|
|
gfc_error ("Duplicate NML specification at %C");
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
if (gfc_find_symbol (name, NULL, 1, &sym))
|
|
return MATCH_ERROR;
|
|
|
|
if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
|
|
{
|
|
gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
|
|
sym != NULL ? sym->name : name);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
dt->namelist = sym;
|
|
if (k == M_READ && check_namelist (sym))
|
|
return MATCH_ERROR;
|
|
|
|
return MATCH_YES;
|
|
}
|
|
|
|
m = match_etag (&tag_rec, &dt->rec);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iomsg, &dt->iomsg);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_iostat, &dt->iostat);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_ltag (&tag_err, &dt->err);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_etag (&tag_advance, &dt->advance);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
m = match_out_tag (&tag_size, &dt->size);
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
m = match_ltag (&tag_end, &dt->end);
|
|
if (m == MATCH_YES)
|
|
{
|
|
if (k == M_WRITE)
|
|
{
|
|
gfc_error ("END tag at %C not allowed in output statement");
|
|
return MATCH_ERROR;
|
|
}
|
|
dt->end_where = gfc_current_locus;
|
|
}
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
m = match_ltag (&tag_eor, &dt->eor);
|
|
if (m == MATCH_YES)
|
|
dt->eor_where = gfc_current_locus;
|
|
if (m != MATCH_NO)
|
|
return m;
|
|
|
|
return MATCH_NO;
|
|
}
|
|
|
|
|
|
/* Free a data transfer structure and everything below it. */
|
|
|
|
void
|
|
gfc_free_dt (gfc_dt * dt)
|
|
{
|
|
|
|
if (dt == NULL)
|
|
return;
|
|
|
|
gfc_free_expr (dt->io_unit);
|
|
gfc_free_expr (dt->format_expr);
|
|
gfc_free_expr (dt->rec);
|
|
gfc_free_expr (dt->advance);
|
|
gfc_free_expr (dt->iomsg);
|
|
gfc_free_expr (dt->iostat);
|
|
gfc_free_expr (dt->size);
|
|
|
|
gfc_free (dt);
|
|
}
|
|
|
|
|
|
/* Resolve everything in a gfc_dt structure. */
|
|
|
|
try
|
|
gfc_resolve_dt (gfc_dt * dt)
|
|
{
|
|
gfc_expr *e;
|
|
|
|
RESOLVE_TAG (&tag_format, dt->format_expr);
|
|
RESOLVE_TAG (&tag_rec, dt->rec);
|
|
RESOLVE_TAG (&tag_advance, dt->advance);
|
|
RESOLVE_TAG (&tag_iomsg, dt->iomsg);
|
|
RESOLVE_TAG (&tag_iostat, dt->iostat);
|
|
RESOLVE_TAG (&tag_size, dt->size);
|
|
|
|
e = dt->io_unit;
|
|
if (gfc_resolve_expr (e) == SUCCESS
|
|
&& (e->ts.type != BT_INTEGER
|
|
&& (e->ts.type != BT_CHARACTER
|
|
|| e->expr_type != EXPR_VARIABLE)))
|
|
{
|
|
gfc_error
|
|
("UNIT specification at %L must be an INTEGER expression or a "
|
|
"CHARACTER variable", &e->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
/* Sanity checks on data transfer statements. */
|
|
if (e->ts.type == BT_CHARACTER)
|
|
{
|
|
if (dt->rec != NULL)
|
|
{
|
|
gfc_error ("REC tag at %L is incompatible with internal file",
|
|
&dt->rec->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->namelist != NULL)
|
|
{
|
|
gfc_error ("Internal file at %L is incompatible with namelist",
|
|
&dt->io_unit->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->advance != NULL)
|
|
{
|
|
gfc_error ("ADVANCE tag at %L is incompatible with internal file",
|
|
&dt->advance->where);
|
|
return FAILURE;
|
|
}
|
|
}
|
|
|
|
if (dt->rec != NULL)
|
|
{
|
|
if (dt->end != NULL)
|
|
{
|
|
gfc_error ("REC tag at %L is incompatible with END tag",
|
|
&dt->rec->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->format_label == &format_asterisk)
|
|
{
|
|
gfc_error
|
|
("END tag at %L is incompatible with list directed format (*)",
|
|
&dt->end_where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->namelist != NULL)
|
|
{
|
|
gfc_error ("REC tag at %L is incompatible with namelist",
|
|
&dt->rec->where);
|
|
return FAILURE;
|
|
}
|
|
}
|
|
|
|
if (dt->advance != NULL && dt->format_label == &format_asterisk)
|
|
{
|
|
gfc_error ("ADVANCE tag at %L is incompatible with list directed "
|
|
"format (*)", &dt->advance->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->eor != 0 && dt->advance == NULL)
|
|
{
|
|
gfc_error ("EOR tag at %L requires an ADVANCE tag", &dt->eor_where);
|
|
return FAILURE;
|
|
}
|
|
|
|
if (dt->size != NULL && dt->advance == NULL)
|
|
{
|
|
gfc_error ("SIZE tag at %L requires an ADVANCE tag", &dt->size->where);
|
|
return FAILURE;
|
|
}
|
|
|
|
/* TODO: Make sure the ADVANCE tag is 'yes' or 'no' if it is a string
|
|
constant. */
|
|
|
|
if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
/* Check the format label actually exists. */
|
|
if (dt->format_label && dt->format_label != &format_asterisk
|
|
&& dt->format_label->defined == ST_LABEL_UNKNOWN)
|
|
{
|
|
gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
|
|
&dt->format_label->where);
|
|
return FAILURE;
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
|
|
/* Given an io_kind, return its name. */
|
|
|
|
static const char *
|
|
io_kind_name (io_kind k)
|
|
{
|
|
const char *name;
|
|
|
|
switch (k)
|
|
{
|
|
case M_READ:
|
|
name = "READ";
|
|
break;
|
|
case M_WRITE:
|
|
name = "WRITE";
|
|
break;
|
|
case M_PRINT:
|
|
name = "PRINT";
|
|
break;
|
|
case M_INQUIRE:
|
|
name = "INQUIRE";
|
|
break;
|
|
default:
|
|
gfc_internal_error ("io_kind_name(): bad I/O-kind");
|
|
}
|
|
|
|
return name;
|
|
}
|
|
|
|
|
|
/* Match an IO iteration statement of the form:
|
|
|
|
( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
|
|
|
|
which is equivalent to a single IO element. This function is
|
|
mutually recursive with match_io_element(). */
|
|
|
|
static match match_io_element (io_kind k, gfc_code **);
|
|
|
|
static match
|
|
match_io_iterator (io_kind k, gfc_code ** result)
|
|
{
|
|
gfc_code *head, *tail, *new;
|
|
gfc_iterator *iter;
|
|
locus old_loc;
|
|
match m;
|
|
int n;
|
|
|
|
iter = NULL;
|
|
head = NULL;
|
|
old_loc = gfc_current_locus;
|
|
|
|
if (gfc_match_char ('(') != MATCH_YES)
|
|
return MATCH_NO;
|
|
|
|
m = match_io_element (k, &head);
|
|
tail = head;
|
|
|
|
if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
|
|
{
|
|
m = MATCH_NO;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Can't be anything but an IO iterator. Build a list. */
|
|
iter = gfc_get_iterator ();
|
|
|
|
for (n = 1;; n++)
|
|
{
|
|
m = gfc_match_iterator (iter, 0);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_YES)
|
|
{
|
|
gfc_check_do_variable (iter->var->symtree);
|
|
break;
|
|
}
|
|
|
|
m = match_io_element (k, &new);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
{
|
|
if (n > 2)
|
|
goto syntax;
|
|
goto cleanup;
|
|
}
|
|
|
|
tail = gfc_append_code (tail, new);
|
|
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
{
|
|
if (n > 2)
|
|
goto syntax;
|
|
m = MATCH_NO;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
if (gfc_match_char (')') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
new = gfc_get_code ();
|
|
new->op = EXEC_DO;
|
|
new->ext.iterator = iter;
|
|
|
|
new->block = gfc_get_code ();
|
|
new->block->op = EXEC_DO;
|
|
new->block->next = head;
|
|
|
|
*result = new;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_error ("Syntax error in I/O iterator at %C");
|
|
m = MATCH_ERROR;
|
|
|
|
cleanup:
|
|
gfc_free_iterator (iter, 1);
|
|
gfc_free_statements (head);
|
|
gfc_current_locus = old_loc;
|
|
return m;
|
|
}
|
|
|
|
|
|
/* Match a single element of an IO list, which is either a single
|
|
expression or an IO Iterator. */
|
|
|
|
static match
|
|
match_io_element (io_kind k, gfc_code ** cpp)
|
|
{
|
|
gfc_expr *expr;
|
|
gfc_code *cp;
|
|
match m;
|
|
|
|
expr = NULL;
|
|
|
|
m = match_io_iterator (k, cpp);
|
|
if (m == MATCH_YES)
|
|
return MATCH_YES;
|
|
|
|
if (k == M_READ)
|
|
{
|
|
m = gfc_match_variable (&expr, 0);
|
|
if (m == MATCH_NO)
|
|
gfc_error ("Expected variable in READ statement at %C");
|
|
}
|
|
else
|
|
{
|
|
m = gfc_match_expr (&expr);
|
|
if (m == MATCH_NO)
|
|
gfc_error ("Expected expression in %s statement at %C",
|
|
io_kind_name (k));
|
|
}
|
|
|
|
if (m == MATCH_YES)
|
|
switch (k)
|
|
{
|
|
case M_READ:
|
|
if (expr->symtree->n.sym->attr.intent == INTENT_IN)
|
|
{
|
|
gfc_error
|
|
("Variable '%s' in input list at %C cannot be INTENT(IN)",
|
|
expr->symtree->n.sym->name);
|
|
m = MATCH_ERROR;
|
|
}
|
|
|
|
if (gfc_pure (NULL)
|
|
&& gfc_impure_variable (expr->symtree->n.sym)
|
|
&& current_dt->io_unit->ts.type == BT_CHARACTER)
|
|
{
|
|
gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
|
|
expr->symtree->n.sym->name);
|
|
m = MATCH_ERROR;
|
|
}
|
|
|
|
if (gfc_check_do_variable (expr->symtree))
|
|
m = MATCH_ERROR;
|
|
|
|
break;
|
|
|
|
case M_WRITE:
|
|
if (current_dt->io_unit->ts.type == BT_CHARACTER
|
|
&& gfc_pure (NULL)
|
|
&& current_dt->io_unit->expr_type == EXPR_VARIABLE
|
|
&& gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
|
|
{
|
|
gfc_error
|
|
("Cannot write to internal file unit '%s' at %C inside a "
|
|
"PURE procedure", current_dt->io_unit->symtree->n.sym->name);
|
|
m = MATCH_ERROR;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (m != MATCH_YES)
|
|
{
|
|
gfc_free_expr (expr);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
cp = gfc_get_code ();
|
|
cp->op = EXEC_TRANSFER;
|
|
cp->expr = expr;
|
|
|
|
*cpp = cp;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
|
|
/* Match an I/O list, building gfc_code structures as we go. */
|
|
|
|
static match
|
|
match_io_list (io_kind k, gfc_code ** head_p)
|
|
{
|
|
gfc_code *head, *tail, *new;
|
|
match m;
|
|
|
|
*head_p = head = tail = NULL;
|
|
if (gfc_match_eos () == MATCH_YES)
|
|
return MATCH_YES;
|
|
|
|
for (;;)
|
|
{
|
|
m = match_io_element (k, &new);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
|
|
tail = gfc_append_code (tail, new);
|
|
if (head == NULL)
|
|
head = new;
|
|
|
|
if (gfc_match_eos () == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
}
|
|
|
|
*head_p = head;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
|
|
|
|
cleanup:
|
|
gfc_free_statements (head);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Attach the data transfer end node. */
|
|
|
|
static void
|
|
terminate_io (gfc_code * io_code)
|
|
{
|
|
gfc_code *c;
|
|
|
|
if (io_code == NULL)
|
|
io_code = &new_st;
|
|
|
|
c = gfc_get_code ();
|
|
c->op = EXEC_DT_END;
|
|
|
|
/* Point to structure that is already there */
|
|
c->ext.dt = new_st.ext.dt;
|
|
gfc_append_code (io_code, c);
|
|
}
|
|
|
|
|
|
/* Match a READ, WRITE or PRINT statement. */
|
|
|
|
static match
|
|
match_io (io_kind k)
|
|
{
|
|
char name[GFC_MAX_SYMBOL_LEN + 1];
|
|
gfc_code *io_code;
|
|
gfc_symbol *sym;
|
|
gfc_expr *expr;
|
|
int comma_flag, c;
|
|
locus where;
|
|
gfc_dt *dt;
|
|
match m;
|
|
|
|
comma_flag = 0;
|
|
current_dt = dt = gfc_getmem (sizeof (gfc_dt));
|
|
if (gfc_match_char ('(') == MATCH_NO)
|
|
{
|
|
where = gfc_current_locus;
|
|
if (k == M_WRITE)
|
|
goto syntax;
|
|
else if (k == M_PRINT)
|
|
{
|
|
/* Treat the non-standard case of PRINT namelist. */
|
|
if ((gfc_current_form == FORM_FIXED || gfc_peek_char () == ' ')
|
|
&& gfc_match_name (name) == MATCH_YES)
|
|
{
|
|
gfc_find_symbol (name, NULL, 1, &sym);
|
|
if (sym && sym->attr.flavor == FL_NAMELIST)
|
|
{
|
|
if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
|
|
"%C is an extension") == FAILURE)
|
|
{
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
if (gfc_match_eos () == MATCH_NO)
|
|
{
|
|
gfc_error ("Namelist followed by I/O list at %C");
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
|
|
dt->io_unit = default_unit (k);
|
|
dt->namelist = sym;
|
|
goto get_io_list;
|
|
}
|
|
else
|
|
gfc_current_locus = where;
|
|
}
|
|
}
|
|
|
|
if (gfc_current_form == FORM_FREE)
|
|
{
|
|
c = gfc_peek_char();
|
|
if (c != ' ' && c != '*' && c != '\'' && c != '"')
|
|
{
|
|
m = MATCH_NO;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
m = match_dt_format (dt);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
|
|
comma_flag = 1;
|
|
dt->io_unit = default_unit (k);
|
|
goto get_io_list;
|
|
}
|
|
|
|
/* Match a control list */
|
|
if (match_dt_element (k, dt) == MATCH_YES)
|
|
goto next;
|
|
if (match_dt_unit (k, dt) != MATCH_YES)
|
|
goto loop;
|
|
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
goto get_io_list;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_dt_element (k, dt);
|
|
if (m == MATCH_YES)
|
|
goto next;
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
|
|
m = match_dt_format (dt);
|
|
if (m == MATCH_YES)
|
|
goto next;
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
|
|
where = gfc_current_locus;
|
|
|
|
m = gfc_match_name (name);
|
|
if (m == MATCH_YES)
|
|
{
|
|
gfc_find_symbol (name, NULL, 1, &sym);
|
|
if (sym && sym->attr.flavor == FL_NAMELIST)
|
|
{
|
|
dt->namelist = sym;
|
|
if (k == M_READ && check_namelist (sym))
|
|
{
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
goto next;
|
|
}
|
|
}
|
|
|
|
gfc_current_locus = where;
|
|
|
|
goto loop; /* No matches, try regular elements */
|
|
|
|
next:
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
goto get_io_list;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
loop:
|
|
for (;;)
|
|
{
|
|
m = match_dt_element (k, dt);
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
}
|
|
|
|
get_io_list:
|
|
/* Optional leading comma (non-standard). */
|
|
if (!comma_flag
|
|
&& gfc_match_char (',') == MATCH_YES
|
|
&& k == M_WRITE
|
|
&& gfc_notify_std (GFC_STD_GNU, "Extension: Comma before output "
|
|
"item list at %C is an extension") == FAILURE)
|
|
return MATCH_ERROR;
|
|
|
|
io_code = NULL;
|
|
if (gfc_match_eos () != MATCH_YES)
|
|
{
|
|
if (comma_flag && gfc_match_char (',') != MATCH_YES)
|
|
{
|
|
gfc_error ("Expected comma in I/O list at %C");
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
|
|
m = match_io_list (k, &io_code);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
/* A full IO statement has been matched. */
|
|
if (dt->io_unit->expr_type == EXPR_VARIABLE
|
|
&& k == M_WRITE
|
|
&& dt->io_unit->ts.type == BT_CHARACTER
|
|
&& dt->io_unit->symtree->n.sym->attr.intent == INTENT_IN)
|
|
{
|
|
gfc_error ("Internal file '%s' at %L is INTENT(IN)",
|
|
dt->io_unit->symtree->n.sym->name, &dt->io_unit->where);
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
|
|
expr = dt->format_expr;
|
|
|
|
if (expr != NULL && expr->expr_type == EXPR_CONSTANT)
|
|
check_format_string (expr);
|
|
|
|
if (gfc_pure (NULL)
|
|
&& (k == M_READ || k == M_WRITE)
|
|
&& dt->io_unit->ts.type != BT_CHARACTER)
|
|
{
|
|
gfc_error
|
|
("io-unit in %s statement at %C must be an internal file in a "
|
|
"PURE procedure", io_kind_name (k));
|
|
m = MATCH_ERROR;
|
|
goto cleanup;
|
|
}
|
|
|
|
new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
|
|
new_st.ext.dt = dt;
|
|
new_st.next = io_code;
|
|
|
|
terminate_io (io_code);
|
|
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
|
|
m = MATCH_ERROR;
|
|
|
|
cleanup:
|
|
gfc_free_dt (dt);
|
|
return m;
|
|
}
|
|
|
|
|
|
match
|
|
gfc_match_read (void)
|
|
{
|
|
return match_io (M_READ);
|
|
}
|
|
|
|
match
|
|
gfc_match_write (void)
|
|
{
|
|
return match_io (M_WRITE);
|
|
}
|
|
|
|
match
|
|
gfc_match_print (void)
|
|
{
|
|
match m;
|
|
|
|
m = match_io (M_PRINT);
|
|
if (m != MATCH_YES)
|
|
return m;
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_error ("PRINT statement at %C not allowed within PURE procedure");
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
return MATCH_YES;
|
|
}
|
|
|
|
|
|
/* Free a gfc_inquire structure. */
|
|
|
|
void
|
|
gfc_free_inquire (gfc_inquire * inquire)
|
|
{
|
|
|
|
if (inquire == NULL)
|
|
return;
|
|
|
|
gfc_free_expr (inquire->unit);
|
|
gfc_free_expr (inquire->file);
|
|
gfc_free_expr (inquire->iomsg);
|
|
gfc_free_expr (inquire->iostat);
|
|
gfc_free_expr (inquire->exist);
|
|
gfc_free_expr (inquire->opened);
|
|
gfc_free_expr (inquire->number);
|
|
gfc_free_expr (inquire->named);
|
|
gfc_free_expr (inquire->name);
|
|
gfc_free_expr (inquire->access);
|
|
gfc_free_expr (inquire->sequential);
|
|
gfc_free_expr (inquire->direct);
|
|
gfc_free_expr (inquire->form);
|
|
gfc_free_expr (inquire->formatted);
|
|
gfc_free_expr (inquire->unformatted);
|
|
gfc_free_expr (inquire->recl);
|
|
gfc_free_expr (inquire->nextrec);
|
|
gfc_free_expr (inquire->blank);
|
|
gfc_free_expr (inquire->position);
|
|
gfc_free_expr (inquire->action);
|
|
gfc_free_expr (inquire->read);
|
|
gfc_free_expr (inquire->write);
|
|
gfc_free_expr (inquire->readwrite);
|
|
gfc_free_expr (inquire->delim);
|
|
gfc_free_expr (inquire->pad);
|
|
gfc_free_expr (inquire->iolength);
|
|
|
|
gfc_free (inquire);
|
|
}
|
|
|
|
|
|
/* Match an element of an INQUIRE statement. */
|
|
|
|
#define RETM if (m != MATCH_NO) return m;
|
|
|
|
static match
|
|
match_inquire_element (gfc_inquire * inquire)
|
|
{
|
|
match m;
|
|
|
|
m = match_etag (&tag_unit, &inquire->unit);
|
|
RETM m = match_etag (&tag_file, &inquire->file);
|
|
RETM m = match_ltag (&tag_err, &inquire->err);
|
|
RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
|
|
RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
|
|
RETM m = match_vtag (&tag_exist, &inquire->exist);
|
|
RETM m = match_vtag (&tag_opened, &inquire->opened);
|
|
RETM m = match_vtag (&tag_named, &inquire->named);
|
|
RETM m = match_vtag (&tag_name, &inquire->name);
|
|
RETM m = match_out_tag (&tag_number, &inquire->number);
|
|
RETM m = match_vtag (&tag_s_access, &inquire->access);
|
|
RETM m = match_vtag (&tag_sequential, &inquire->sequential);
|
|
RETM m = match_vtag (&tag_direct, &inquire->direct);
|
|
RETM m = match_vtag (&tag_s_form, &inquire->form);
|
|
RETM m = match_vtag (&tag_formatted, &inquire->formatted);
|
|
RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
|
|
RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
|
|
RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
|
|
RETM m = match_vtag (&tag_s_blank, &inquire->blank);
|
|
RETM m = match_vtag (&tag_s_position, &inquire->position);
|
|
RETM m = match_vtag (&tag_s_action, &inquire->action);
|
|
RETM m = match_vtag (&tag_read, &inquire->read);
|
|
RETM m = match_vtag (&tag_write, &inquire->write);
|
|
RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
|
|
RETM m = match_vtag (&tag_s_delim, &inquire->delim);
|
|
RETM m = match_vtag (&tag_s_pad, &inquire->pad);
|
|
RETM m = match_vtag (&tag_iolength, &inquire->iolength);
|
|
RETM return MATCH_NO;
|
|
}
|
|
|
|
#undef RETM
|
|
|
|
|
|
match
|
|
gfc_match_inquire (void)
|
|
{
|
|
gfc_inquire *inquire;
|
|
gfc_code *code;
|
|
match m;
|
|
locus loc;
|
|
|
|
m = gfc_match_char ('(');
|
|
if (m == MATCH_NO)
|
|
return m;
|
|
|
|
inquire = gfc_getmem (sizeof (gfc_inquire));
|
|
|
|
loc = gfc_current_locus;
|
|
|
|
m = match_inquire_element (inquire);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
{
|
|
m = gfc_match_expr (&inquire->unit);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
}
|
|
|
|
/* See if we have the IOLENGTH form of the inquire statement. */
|
|
if (inquire->iolength != NULL)
|
|
{
|
|
if (gfc_match_char (')') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_io_list (M_INQUIRE, &code);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
|
|
terminate_io (code);
|
|
|
|
new_st.op = EXEC_IOLENGTH;
|
|
new_st.expr = inquire->iolength;
|
|
new_st.ext.inquire = inquire;
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_free_statements (code);
|
|
gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
new_st.next = code;
|
|
return MATCH_YES;
|
|
}
|
|
|
|
/* At this point, we have the non-IOLENGTH inquire statement. */
|
|
for (;;)
|
|
{
|
|
if (gfc_match_char (')') == MATCH_YES)
|
|
break;
|
|
if (gfc_match_char (',') != MATCH_YES)
|
|
goto syntax;
|
|
|
|
m = match_inquire_element (inquire);
|
|
if (m == MATCH_ERROR)
|
|
goto cleanup;
|
|
if (m == MATCH_NO)
|
|
goto syntax;
|
|
|
|
if (inquire->iolength != NULL)
|
|
{
|
|
gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
if (gfc_match_eos () != MATCH_YES)
|
|
goto syntax;
|
|
|
|
if (inquire->unit != NULL && inquire->file != NULL)
|
|
{
|
|
gfc_error ("INQUIRE statement at %L cannot contain both FILE and"
|
|
" UNIT specifiers", &loc);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (inquire->unit == NULL && inquire->file == NULL)
|
|
{
|
|
gfc_error ("INQUIRE statement at %L requires either FILE or"
|
|
" UNIT specifier", &loc);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (gfc_pure (NULL))
|
|
{
|
|
gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
|
|
goto cleanup;
|
|
}
|
|
|
|
new_st.op = EXEC_INQUIRE;
|
|
new_st.ext.inquire = inquire;
|
|
return MATCH_YES;
|
|
|
|
syntax:
|
|
gfc_syntax_error (ST_INQUIRE);
|
|
|
|
cleanup:
|
|
gfc_free_inquire (inquire);
|
|
return MATCH_ERROR;
|
|
}
|
|
|
|
|
|
/* Resolve everything in a gfc_inquire structure. */
|
|
|
|
try
|
|
gfc_resolve_inquire (gfc_inquire * inquire)
|
|
{
|
|
|
|
RESOLVE_TAG (&tag_unit, inquire->unit);
|
|
RESOLVE_TAG (&tag_file, inquire->file);
|
|
RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
|
|
RESOLVE_TAG (&tag_iostat, inquire->iostat);
|
|
RESOLVE_TAG (&tag_exist, inquire->exist);
|
|
RESOLVE_TAG (&tag_opened, inquire->opened);
|
|
RESOLVE_TAG (&tag_number, inquire->number);
|
|
RESOLVE_TAG (&tag_named, inquire->named);
|
|
RESOLVE_TAG (&tag_name, inquire->name);
|
|
RESOLVE_TAG (&tag_s_access, inquire->access);
|
|
RESOLVE_TAG (&tag_sequential, inquire->sequential);
|
|
RESOLVE_TAG (&tag_direct, inquire->direct);
|
|
RESOLVE_TAG (&tag_s_form, inquire->form);
|
|
RESOLVE_TAG (&tag_formatted, inquire->formatted);
|
|
RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
|
|
RESOLVE_TAG (&tag_s_recl, inquire->recl);
|
|
RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
|
|
RESOLVE_TAG (&tag_s_blank, inquire->blank);
|
|
RESOLVE_TAG (&tag_s_position, inquire->position);
|
|
RESOLVE_TAG (&tag_s_action, inquire->action);
|
|
RESOLVE_TAG (&tag_read, inquire->read);
|
|
RESOLVE_TAG (&tag_write, inquire->write);
|
|
RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
|
|
RESOLVE_TAG (&tag_s_delim, inquire->delim);
|
|
RESOLVE_TAG (&tag_s_pad, inquire->pad);
|
|
RESOLVE_TAG (&tag_iolength, inquire->iolength);
|
|
|
|
if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
|
|
return FAILURE;
|
|
|
|
return SUCCESS;
|
|
}
|