Fri Jul 5 12:22:51 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
[glibc.git] / string / argz-create.c
blob2be16b03e7646b7334d051b73070f2be539fe7ab
1 /* Routines for dealing with '\0' separated arg vectors.
3 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
5 Written by Miles Bader <miles@gnu.ai.mit.edu>
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2, or (at
10 your option) any later version.
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #include <argz.h>
22 #include <stdlib.h>
23 #include <string.h>
25 /* Make a '\0' separated arg vector from a unix argv vector, returning it in
26 ARGZ, and the total length in LEN. If a memory allocation error occurs,
27 ENOMEM is returned, otherwise 0. */
28 error_t
29 __argz_create (char *const argv[], char **argz, size_t *len)
31 int argc;
32 size_t tlen = 0;
33 char *const *ap;
34 char *p;
36 for (argc = 0; argv[argc] != NULL; ++argc)
37 tlen += strlen (argv[argc]) + 1;
39 if (tlen == 0)
40 *argz = NULL;
41 else
43 *argz = malloc(tlen);
44 if (*argz == NULL)
45 return ENOMEM;
47 for (p = *argz, ap = argv; *ap; ++ap, ++p)
48 p = __stpcpy (p, *ap);
50 *len = tlen;
52 return 0;
54 weak_alias (__argz_create, argz_create)