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b41b2534 JB |
1 | /* Implementation of the GETARG and IARGC g77, and |
2 | corresponding F2003, intrinsics. | |
5920b5d2 | 3 | Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
b41b2534 | 4 | Contributed by Bud Davis and Janne Blomqvist. |
4aef80f8 BD |
5 | |
6 | This file is part of the GNU Fortran 95 runtime library (libgfortran). | |
7 | ||
8 | Libgfortran is free software; you can redistribute it and/or | |
57dea9f6 | 9 | modify it under the terms of the GNU General Public |
4aef80f8 | 10 | License as published by the Free Software Foundation; either |
57dea9f6 TM |
11 | version 2 of the License, or (at your option) any later version. |
12 | ||
13 | In addition to the permissions in the GNU General Public License, the | |
14 | Free Software Foundation gives you unlimited permission to link the | |
15 | compiled version of this file into combinations with other programs, | |
16 | and to distribute those combinations without any restriction coming | |
17 | from the use of this file. (The General Public License restrictions | |
18 | do apply in other respects; for example, they cover modification of | |
19 | the file, and distribution when not linked into a combine | |
20 | executable.) | |
4aef80f8 BD |
21 | |
22 | Libgfortran is distributed in the hope that it will be useful, | |
23 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57dea9f6 | 25 | GNU General Public License for more details. |
4aef80f8 | 26 | |
57dea9f6 TM |
27 | You should have received a copy of the GNU General Public |
28 | License along with libgfortran; see the file COPYING. If not, | |
4aef80f8 BD |
29 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
30 | Boston, MA 02111-1307, USA. */ | |
31 | ||
32 | #include "config.h" | |
33 | #include <sys/types.h> | |
34 | #include <string.h> | |
35 | #include "libgfortran.h" | |
36 | ||
b41b2534 JB |
37 | |
38 | /* Get a commandline argument. */ | |
39 | ||
7d7b8bfe RH |
40 | extern void getarg_i4 (GFC_INTEGER_4 *, char *, gfc_charlen_type); |
41 | iexport_proto(getarg_i4); | |
42 | ||
4aef80f8 | 43 | void |
7d7b8bfe | 44 | getarg_i4 (GFC_INTEGER_4 *pos, char *val, gfc_charlen_type val_len) |
4aef80f8 BD |
45 | { |
46 | int argc; | |
47 | int arglen; | |
48 | char **argv; | |
49 | ||
50 | get_args (&argc, &argv); | |
51 | ||
52 | if (val_len < 1 || !val ) | |
53 | return; /* something is wrong , leave immediately */ | |
54 | ||
b41b2534 | 55 | memset (val, ' ', val_len); |
4aef80f8 BD |
56 | |
57 | if ((*pos) + 1 <= argc && *pos >=0 ) | |
58 | { | |
59 | arglen = strlen (argv[*pos]); | |
60 | if (arglen > val_len) | |
61 | arglen = val_len; | |
62 | memcpy (val, argv[*pos], arglen); | |
63 | } | |
64 | } | |
7d7b8bfe | 65 | iexport(getarg_i4); |
4aef80f8 | 66 | |
b41b2534 JB |
67 | |
68 | /* INTEGER*8 wrapper of getarg. */ | |
69 | ||
7d7b8bfe RH |
70 | extern void getarg_i8 (GFC_INTEGER_8 *, char *, gfc_charlen_type); |
71 | export_proto (getarg_i8); | |
72 | ||
b41b2534 | 73 | void |
7d7b8bfe | 74 | getarg_i8 (GFC_INTEGER_8 *pos, char *val, gfc_charlen_type val_len) |
b41b2534 | 75 | { |
7d7b8bfe RH |
76 | GFC_INTEGER_4 pos4 = (GFC_INTEGER_4) *pos; |
77 | getarg_i4 (&pos4, val, val_len); | |
b41b2534 JB |
78 | } |
79 | ||
80 | ||
5920b5d2 SK |
81 | /* Return the number of commandline arguments. The g77 info page |
82 | states that iargc does not include the specification of the | |
83 | program name itself. */ | |
b41b2534 | 84 | |
7d7b8bfe RH |
85 | extern GFC_INTEGER_4 iargc (void); |
86 | export_proto(iargc); | |
87 | ||
4aef80f8 | 88 | GFC_INTEGER_4 |
7d7b8bfe | 89 | iargc (void) |
4aef80f8 BD |
90 | { |
91 | int argc; | |
92 | char **argv; | |
93 | ||
94 | get_args (&argc, &argv); | |
95 | ||
5920b5d2 | 96 | return (argc - 1); |
4aef80f8 | 97 | } |
b41b2534 JB |
98 | |
99 | ||
100 | /* F2003 intrinsic functions and subroutines related to command line | |
101 | arguments. | |
102 | ||
103 | - function command_argument_count() is converted to iargc by the compiler. | |
104 | ||
105 | - subroutine get_command([command, length, status]). | |
106 | ||
107 | - subroutine get_command_argument(number, [value, length, status]). | |
108 | */ | |
109 | ||
110 | /* These two status codes are specified in the standard. */ | |
111 | #define GFC_GC_SUCCESS 0 | |
112 | #define GFC_GC_VALUE_TOO_SHORT -1 | |
113 | ||
114 | /* Processor-specific status failure code. */ | |
115 | #define GFC_GC_FAILURE 42 | |
116 | ||
117 | ||
7d7b8bfe RH |
118 | extern void get_command_argument_i4 (GFC_INTEGER_4 *, char *, GFC_INTEGER_4 *, |
119 | GFC_INTEGER_4 *, gfc_charlen_type); | |
120 | iexport_proto(get_command_argument_i4); | |
121 | ||
b41b2534 JB |
122 | /* Get a single commandline argument. */ |
123 | ||
124 | void | |
7d7b8bfe RH |
125 | get_command_argument_i4 (GFC_INTEGER_4 *number, char *value, |
126 | GFC_INTEGER_4 *length, GFC_INTEGER_4 *status, | |
127 | gfc_charlen_type value_len) | |
b41b2534 JB |
128 | { |
129 | int argc, arglen = 0, stat_flag = GFC_GC_SUCCESS; | |
130 | char **argv; | |
131 | ||
132 | if (number == NULL ) | |
133 | /* Should never happen. */ | |
134 | runtime_error ("Missing argument to get_command_argument"); | |
135 | ||
136 | if (value == NULL && length == NULL && status == NULL) | |
137 | return; /* No need to do anything. */ | |
138 | ||
139 | get_args (&argc, &argv); | |
140 | ||
141 | if (*number < 0 || *number >= argc) | |
142 | stat_flag = GFC_GC_FAILURE; | |
143 | else | |
144 | arglen = strlen(argv[*number]); | |
145 | ||
146 | if (value != NULL) | |
147 | { | |
148 | if (value_len < 1) | |
149 | stat_flag = GFC_GC_FAILURE; | |
150 | else | |
151 | memset (value, ' ', value_len); | |
152 | } | |
153 | ||
154 | if (value != NULL && stat_flag != GFC_GC_FAILURE) | |
155 | { | |
156 | if (arglen > value_len) | |
157 | { | |
158 | arglen = value_len; | |
159 | stat_flag = GFC_GC_VALUE_TOO_SHORT; | |
160 | } | |
161 | memcpy (value, argv[*number], arglen); | |
162 | } | |
163 | ||
164 | if (length != NULL) | |
165 | *length = arglen; | |
166 | ||
167 | if (status != NULL) | |
168 | *status = stat_flag; | |
169 | } | |
7d7b8bfe | 170 | iexport(get_command_argument_i4); |
b41b2534 JB |
171 | |
172 | ||
173 | /* INTEGER*8 wrapper for get_command_argument. */ | |
174 | ||
7d7b8bfe RH |
175 | extern void get_command_argument_i8 (GFC_INTEGER_8 *, char *, GFC_INTEGER_8 *, |
176 | GFC_INTEGER_8 *, gfc_charlen_type); | |
177 | export_proto(get_command_argument_i8); | |
178 | ||
b41b2534 | 179 | void |
7d7b8bfe RH |
180 | get_command_argument_i8 (GFC_INTEGER_8 *number, char *value, |
181 | GFC_INTEGER_8 *length, GFC_INTEGER_8 *status, | |
182 | gfc_charlen_type value_len) | |
b41b2534 JB |
183 | { |
184 | GFC_INTEGER_4 number4; | |
185 | GFC_INTEGER_4 length4; | |
186 | GFC_INTEGER_4 status4; | |
187 | ||
188 | number4 = (GFC_INTEGER_4) *number; | |
7d7b8bfe | 189 | get_command_argument_i4 (&number4, value, &length4, &status4, value_len); |
b41b2534 JB |
190 | if (length) |
191 | *length = length4; | |
192 | if (status) | |
193 | *status = status4; | |
194 | } | |
195 | ||
196 | ||
197 | /* Return the whole commandline. */ | |
198 | ||
7d7b8bfe RH |
199 | extern void get_command_i4 (char *, GFC_INTEGER_4 *, GFC_INTEGER_4 *, |
200 | gfc_charlen_type); | |
201 | iexport_proto(get_command_i4); | |
202 | ||
b41b2534 | 203 | void |
7d7b8bfe RH |
204 | get_command_i4 (char *command, GFC_INTEGER_4 *length, GFC_INTEGER_4 *status, |
205 | gfc_charlen_type command_len) | |
b41b2534 JB |
206 | { |
207 | int i, argc, arglen, thisarg; | |
208 | int stat_flag = GFC_GC_SUCCESS; | |
209 | int tot_len = 0; | |
210 | char **argv; | |
211 | ||
212 | if (command == NULL && length == NULL && status == NULL) | |
213 | return; /* No need to do anything. */ | |
214 | ||
215 | get_args (&argc, &argv); | |
216 | ||
217 | if (command != NULL) | |
218 | { | |
219 | /* Initialize the string to blanks. */ | |
220 | if (command_len < 1) | |
221 | stat_flag = GFC_GC_FAILURE; | |
222 | else | |
223 | memset (command, ' ', command_len); | |
224 | } | |
225 | ||
226 | for (i = 0; i < argc ; i++) | |
227 | { | |
228 | arglen = strlen(argv[i]); | |
229 | ||
230 | if (command != NULL && stat_flag == GFC_GC_SUCCESS) | |
231 | { | |
232 | thisarg = arglen; | |
233 | if (tot_len + thisarg > command_len) | |
234 | { | |
235 | thisarg = command_len - tot_len; /* Truncate. */ | |
236 | stat_flag = GFC_GC_VALUE_TOO_SHORT; | |
237 | } | |
238 | /* Also a space before the next arg. */ | |
239 | else if (i != argc - 1 && tot_len + arglen == command_len) | |
240 | stat_flag = GFC_GC_VALUE_TOO_SHORT; | |
241 | ||
242 | memcpy (&command[tot_len], argv[i], thisarg); | |
243 | } | |
244 | ||
245 | /* Add the legth of the argument. */ | |
246 | tot_len += arglen; | |
247 | if (i != argc - 1) | |
248 | tot_len++; | |
249 | } | |
250 | ||
251 | if (length != NULL) | |
252 | *length = tot_len; | |
253 | ||
254 | if (status != NULL) | |
255 | *status = stat_flag; | |
256 | } | |
7d7b8bfe | 257 | iexport(get_command_i4); |
b41b2534 JB |
258 | |
259 | ||
260 | /* INTEGER*8 wrapper for get_command. */ | |
261 | ||
7d7b8bfe RH |
262 | extern void get_command_i8 (char *, GFC_INTEGER_8 *, GFC_INTEGER_8 *, |
263 | gfc_charlen_type); | |
264 | export_proto(get_command_i8); | |
265 | ||
b41b2534 | 266 | void |
7d7b8bfe RH |
267 | get_command_i8 (char *command, GFC_INTEGER_8 *length, GFC_INTEGER_8 *status, |
268 | gfc_charlen_type command_len) | |
b41b2534 JB |
269 | { |
270 | GFC_INTEGER_4 length4; | |
271 | GFC_INTEGER_4 status4; | |
272 | ||
7d7b8bfe | 273 | get_command_i4 (command, &length4, &status4, command_len); |
b41b2534 JB |
274 | if (length) |
275 | *length = length4; | |
276 | if (status) | |
277 | *status = status4; | |
278 | } |