1 /* Implementation of the GETARG and IARGC g77, and
2 corresponding F2003, intrinsics.
3 Copyright (C) 2004-2016 Free Software Foundation, Inc.
4 Contributed by Bud Davis and Janne Blomqvist.
6 This file is part of the GNU Fortran 95 runtime library (libgfortran).
8 Libgfortran is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public
10 License as published by the Free Software Foundation; either
11 version 3 of the License, or (at your option) any later version.
13 Libgfortran is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
27 #include "libgfortran.h"
31 /* Get a commandline argument. */
33 extern void getarg_i4 (GFC_INTEGER_4
*, char *, gfc_charlen_type
);
34 iexport_proto(getarg_i4
);
37 getarg_i4 (GFC_INTEGER_4
*pos
, char *val
, gfc_charlen_type val_len
)
43 get_args (&argc
, &argv
);
45 if (val_len
< 1 || !val
)
46 return; /* something is wrong , leave immediately */
48 memset (val
, ' ', val_len
);
50 if ((*pos
) + 1 <= argc
&& *pos
>=0 )
52 arglen
= strlen (argv
[*pos
]);
55 memcpy (val
, argv
[*pos
], arglen
);
61 /* INTEGER*8 wrapper of getarg. */
63 extern void getarg_i8 (GFC_INTEGER_8
*, char *, gfc_charlen_type
);
64 export_proto (getarg_i8
);
67 getarg_i8 (GFC_INTEGER_8
*pos
, char *val
, gfc_charlen_type val_len
)
69 GFC_INTEGER_4 pos4
= (GFC_INTEGER_4
) *pos
;
70 getarg_i4 (&pos4
, val
, val_len
);
74 /* Return the number of commandline arguments. The g77 info page
75 states that iargc does not include the specification of the
76 program name itself. */
78 extern GFC_INTEGER_4
iargc (void);
87 get_args (&argc
, &argv
);
93 /* F2003 intrinsic functions and subroutines related to command line
96 - function command_argument_count() is converted to iargc by the compiler.
98 - subroutine get_command([command, length, status]).
100 - subroutine get_command_argument(number, [value, length, status]).
103 /* These two status codes are specified in the standard. */
104 #define GFC_GC_SUCCESS 0
105 #define GFC_GC_VALUE_TOO_SHORT -1
107 /* Processor-specific status failure code. */
108 #define GFC_GC_FAILURE 42
111 extern void get_command_argument_i4 (GFC_INTEGER_4
*, char *, GFC_INTEGER_4
*,
112 GFC_INTEGER_4
*, gfc_charlen_type
);
113 iexport_proto(get_command_argument_i4
);
115 /* Get a single commandline argument. */
118 get_command_argument_i4 (GFC_INTEGER_4
*number
, char *value
,
119 GFC_INTEGER_4
*length
, GFC_INTEGER_4
*status
,
120 gfc_charlen_type value_len
)
122 int argc
, arglen
= 0, stat_flag
= GFC_GC_SUCCESS
;
126 /* Should never happen. */
127 runtime_error ("Missing argument to get_command_argument");
129 if (value
== NULL
&& length
== NULL
&& status
== NULL
)
130 return; /* No need to do anything. */
132 get_args (&argc
, &argv
);
134 if (*number
< 0 || *number
>= argc
)
135 stat_flag
= GFC_GC_FAILURE
;
137 arglen
= strlen(argv
[*number
]);
142 stat_flag
= GFC_GC_FAILURE
;
144 memset (value
, ' ', value_len
);
147 if (value
!= NULL
&& stat_flag
!= GFC_GC_FAILURE
)
149 if (arglen
> value_len
)
150 stat_flag
= GFC_GC_VALUE_TOO_SHORT
;
152 memcpy (value
, argv
[*number
], arglen
<= value_len
? arglen
: value_len
);
161 iexport(get_command_argument_i4
);
164 /* INTEGER*8 wrapper for get_command_argument. */
166 extern void get_command_argument_i8 (GFC_INTEGER_8
*, char *, GFC_INTEGER_8
*,
167 GFC_INTEGER_8
*, gfc_charlen_type
);
168 export_proto(get_command_argument_i8
);
171 get_command_argument_i8 (GFC_INTEGER_8
*number
, char *value
,
172 GFC_INTEGER_8
*length
, GFC_INTEGER_8
*status
,
173 gfc_charlen_type value_len
)
175 GFC_INTEGER_4 number4
;
176 GFC_INTEGER_4 length4
;
177 GFC_INTEGER_4 status4
;
179 number4
= (GFC_INTEGER_4
) *number
;
180 get_command_argument_i4 (&number4
, value
, &length4
, &status4
, value_len
);
188 /* Return the whole commandline. */
190 extern void get_command_i4 (char *, GFC_INTEGER_4
*, GFC_INTEGER_4
*,
192 iexport_proto(get_command_i4
);
195 get_command_i4 (char *command
, GFC_INTEGER_4
*length
, GFC_INTEGER_4
*status
,
196 gfc_charlen_type command_len
)
198 int i
, argc
, arglen
, thisarg
;
199 int stat_flag
= GFC_GC_SUCCESS
;
203 if (command
== NULL
&& length
== NULL
&& status
== NULL
)
204 return; /* No need to do anything. */
206 get_args (&argc
, &argv
);
210 /* Initialize the string to blanks. */
212 stat_flag
= GFC_GC_FAILURE
;
214 memset (command
, ' ', command_len
);
217 for (i
= 0; i
< argc
; i
++)
219 arglen
= strlen(argv
[i
]);
221 if (command
!= NULL
&& stat_flag
== GFC_GC_SUCCESS
)
224 if (tot_len
+ thisarg
> command_len
)
226 thisarg
= command_len
- tot_len
; /* Truncate. */
227 stat_flag
= GFC_GC_VALUE_TOO_SHORT
;
229 /* Also a space before the next arg. */
230 else if (i
!= argc
- 1 && tot_len
+ arglen
== command_len
)
231 stat_flag
= GFC_GC_VALUE_TOO_SHORT
;
233 memcpy (&command
[tot_len
], argv
[i
], thisarg
);
236 /* Add the legth of the argument. */
248 iexport(get_command_i4
);
251 /* INTEGER*8 wrapper for get_command. */
253 extern void get_command_i8 (char *, GFC_INTEGER_8
*, GFC_INTEGER_8
*,
255 export_proto(get_command_i8
);
258 get_command_i8 (char *command
, GFC_INTEGER_8
*length
, GFC_INTEGER_8
*status
,
259 gfc_charlen_type command_len
)
261 GFC_INTEGER_4 length4
;
262 GFC_INTEGER_4 status4
;
264 get_command_i4 (command
, &length4
, &status4
, command_len
);