newlib/libc/argz/argz_create.c

   1 /* Copyright (C) 2002 by  Red Hat, Incorporated. All rights reserved.
   2  *
   3  * Permission to use, copy, modify, and distribute this software
   4  * is freely granted, provided that this notice is preserved.
   5  */
   6
   7 #include <argz.h>
   8 #include <errno.h>
   9 #include <sys/types.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12
  13 error_t
  14 argz_create (char *const argv[],
  15        char **argz,
  16        size_t *argz_len)
  17 {
  18   int argc = 0;
  19   int i = 0;
  20   int len = 0;
  21   char *iter;
  22
  23   *argz_len = 0;
  24
  25   if (*argv == NULL)
  26     {
  27       *argz = NULL;
  28       return 0;
  29     }
  30
  31   while (argv[argc])
  32     {
  33       *argz_len += (strlen(argv[argc]) + 1);
  34       argc++;
  35     }
  36
  37   /* There are argc strings to copy into argz. */
  38   if(!(*argz = (char *)malloc(*argz_len)))
  39     return ENOMEM;
  40
  41   iter = *argz;
  42   for(i = 0; i < argc; i++)
  43     {
  44       len = strlen(argv[i]) + 1;
  45       memcpy(iter, argv[i], len);
  46       iter += len;
  47     }
  48   return 0;
  49 }