newlib/libc/argz/argz_add.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_add (char **argz,
  15        size_t *argz_len,
  16        const char *str)
  17 {
  18   int len_to_add = 0;
  19   size_t last = *argz_len;
  20
  21   if (str == NULL)
  22     return 0;
  23
  24   len_to_add = strlen(str) + 1;
  25   *argz_len += len_to_add;
  26
  27   if(!(*argz = (char *)realloc(*argz, *argz_len)))
  28     return ENOMEM;
  29
  30   memcpy(*argz + last, str, len_to_add);
  31   return 0;
  32 }