272 lines
6.6 KiB
C
272 lines
6.6 KiB
C
/* Implementation of the GETARG and IARGC g77, and
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corresponding F2003, intrinsics.
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Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
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Contributed by Bud Davis and Janne Blomqvist.
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <string.h>
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/* Get a commandline argument. */
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extern void getarg_i4 (GFC_INTEGER_4 *, char *, gfc_charlen_type);
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iexport_proto(getarg_i4);
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void
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getarg_i4 (GFC_INTEGER_4 *pos, char *val, gfc_charlen_type val_len)
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{
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int argc;
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int arglen;
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char **argv;
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get_args (&argc, &argv);
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if (val_len < 1 || !val )
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return; /* something is wrong , leave immediately */
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memset (val, ' ', val_len);
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if ((*pos) + 1 <= argc && *pos >=0 )
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{
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arglen = strlen (argv[*pos]);
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if (arglen > val_len)
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arglen = val_len;
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memcpy (val, argv[*pos], arglen);
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}
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}
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iexport(getarg_i4);
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/* INTEGER*8 wrapper of getarg. */
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extern void getarg_i8 (GFC_INTEGER_8 *, char *, gfc_charlen_type);
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export_proto (getarg_i8);
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void
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getarg_i8 (GFC_INTEGER_8 *pos, char *val, gfc_charlen_type val_len)
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{
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GFC_INTEGER_4 pos4 = (GFC_INTEGER_4) *pos;
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getarg_i4 (&pos4, val, val_len);
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}
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/* Return the number of commandline arguments. The g77 info page
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states that iargc does not include the specification of the
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program name itself. */
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extern GFC_INTEGER_4 iargc (void);
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export_proto(iargc);
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GFC_INTEGER_4
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iargc (void)
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{
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int argc;
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char **argv;
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get_args (&argc, &argv);
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return (argc - 1);
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}
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/* F2003 intrinsic functions and subroutines related to command line
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arguments.
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- function command_argument_count() is converted to iargc by the compiler.
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- subroutine get_command([command, length, status]).
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- subroutine get_command_argument(number, [value, length, status]).
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*/
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/* These two status codes are specified in the standard. */
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#define GFC_GC_SUCCESS 0
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#define GFC_GC_VALUE_TOO_SHORT -1
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/* Processor-specific status failure code. */
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#define GFC_GC_FAILURE 42
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extern void get_command_argument_i4 (GFC_INTEGER_4 *, char *, GFC_INTEGER_4 *,
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GFC_INTEGER_4 *, gfc_charlen_type);
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iexport_proto(get_command_argument_i4);
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/* Get a single commandline argument. */
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void
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get_command_argument_i4 (GFC_INTEGER_4 *number, char *value,
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GFC_INTEGER_4 *length, GFC_INTEGER_4 *status,
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gfc_charlen_type value_len)
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{
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int argc, arglen = 0, stat_flag = GFC_GC_SUCCESS;
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char **argv;
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if (number == NULL )
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/* Should never happen. */
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runtime_error ("Missing argument to get_command_argument");
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if (value == NULL && length == NULL && status == NULL)
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return; /* No need to do anything. */
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get_args (&argc, &argv);
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if (*number < 0 || *number >= argc)
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stat_flag = GFC_GC_FAILURE;
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else
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arglen = strlen(argv[*number]);
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if (value != NULL)
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{
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if (value_len < 1)
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stat_flag = GFC_GC_FAILURE;
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else
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memset (value, ' ', value_len);
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}
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if (value != NULL && stat_flag != GFC_GC_FAILURE)
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{
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if (arglen > value_len)
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{
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arglen = value_len;
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stat_flag = GFC_GC_VALUE_TOO_SHORT;
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}
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memcpy (value, argv[*number], arglen);
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}
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if (length != NULL)
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*length = arglen;
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if (status != NULL)
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*status = stat_flag;
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}
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iexport(get_command_argument_i4);
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/* INTEGER*8 wrapper for get_command_argument. */
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extern void get_command_argument_i8 (GFC_INTEGER_8 *, char *, GFC_INTEGER_8 *,
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GFC_INTEGER_8 *, gfc_charlen_type);
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export_proto(get_command_argument_i8);
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void
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get_command_argument_i8 (GFC_INTEGER_8 *number, char *value,
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GFC_INTEGER_8 *length, GFC_INTEGER_8 *status,
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gfc_charlen_type value_len)
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{
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GFC_INTEGER_4 number4;
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GFC_INTEGER_4 length4;
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GFC_INTEGER_4 status4;
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number4 = (GFC_INTEGER_4) *number;
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get_command_argument_i4 (&number4, value, &length4, &status4, value_len);
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if (length)
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*length = length4;
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if (status)
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*status = status4;
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}
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/* Return the whole commandline. */
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extern void get_command_i4 (char *, GFC_INTEGER_4 *, GFC_INTEGER_4 *,
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gfc_charlen_type);
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iexport_proto(get_command_i4);
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void
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get_command_i4 (char *command, GFC_INTEGER_4 *length, GFC_INTEGER_4 *status,
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gfc_charlen_type command_len)
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{
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int i, argc, arglen, thisarg;
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int stat_flag = GFC_GC_SUCCESS;
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int tot_len = 0;
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char **argv;
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if (command == NULL && length == NULL && status == NULL)
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return; /* No need to do anything. */
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get_args (&argc, &argv);
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if (command != NULL)
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{
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/* Initialize the string to blanks. */
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if (command_len < 1)
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stat_flag = GFC_GC_FAILURE;
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else
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memset (command, ' ', command_len);
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}
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for (i = 0; i < argc ; i++)
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{
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arglen = strlen(argv[i]);
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if (command != NULL && stat_flag == GFC_GC_SUCCESS)
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{
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thisarg = arglen;
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if (tot_len + thisarg > command_len)
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{
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thisarg = command_len - tot_len; /* Truncate. */
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stat_flag = GFC_GC_VALUE_TOO_SHORT;
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}
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/* Also a space before the next arg. */
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else if (i != argc - 1 && tot_len + arglen == command_len)
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stat_flag = GFC_GC_VALUE_TOO_SHORT;
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memcpy (&command[tot_len], argv[i], thisarg);
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}
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/* Add the legth of the argument. */
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tot_len += arglen;
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if (i != argc - 1)
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tot_len++;
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}
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if (length != NULL)
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*length = tot_len;
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if (status != NULL)
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*status = stat_flag;
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}
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iexport(get_command_i4);
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/* INTEGER*8 wrapper for get_command. */
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extern void get_command_i8 (char *, GFC_INTEGER_8 *, GFC_INTEGER_8 *,
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gfc_charlen_type);
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export_proto(get_command_i8);
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void
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get_command_i8 (char *command, GFC_INTEGER_8 *length, GFC_INTEGER_8 *status,
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gfc_charlen_type command_len)
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{
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GFC_INTEGER_4 length4;
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GFC_INTEGER_4 status4;
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get_command_i4 (command, &length4, &status4, command_len);
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if (length)
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*length = length4;
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if (status)
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*status = status4;
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}
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