1/* Routines for dealing with '\0' separated arg vectors.
2 Copyright (C) 1995-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Miles Bader <miles@gnu.ai.mit.edu>
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <argz.h>
21#include <stdlib.h>
22#include <string.h>
23
24/* Make a '\0' separated arg vector from a unix argv vector, returning it in
25 ARGZ, and the total length in LEN. If a memory allocation error occurs,
26 ENOMEM is returned, otherwise 0. */
27error_t
28__argz_create (char *const argv[], char **argz, size_t *len)
29{
30 int argc;
31 size_t tlen = 0;
32 char *const *ap;
33 char *p;
34
35 for (argc = 0; argv[argc] != NULL; ++argc)
36 tlen += strlen (argv[argc]) + 1;
37
38 if (tlen == 0)
39 *argz = NULL;
40 else
41 {
42 *argz = malloc (tlen);
43 if (*argz == NULL)
44 return ENOMEM;
45
46 for (p = *argz, ap = argv; *ap; ++ap, ++p)
47 p = __stpcpy (p, *ap);
48 }
49 *len = tlen;
50
51 return 0;
52}
53weak_alias (__argz_create, argz_create)
54