newlib/libc/argz/argz_append.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_append (char **argz,
  15        size_t *argz_len,
  16        const char *buf,
  17        size_t buf_len)
  18 {
  19   if (buf_len)
  20     {
  21       size_t last = *argz_len;
  22
  23       *argz_len += buf_len;
  24
  25       if(!(*argz = (char *)realloc(*argz, *argz_len)))
  26         return ENOMEM;
  27
  28       memcpy(*argz + last, buf, buf_len);
  29     }
  30   return 0;
  31 }