newlib/libc/argz/argz_delete.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_delete (char **argz,
  15        size_t *argz_len,
  16        char *entry)
  17 {
  18   int len = 0;
  19   char *moveto = entry;
  20
  21   if (entry)
  22     {
  23       len = strlen(entry) + 1;
  24       entry += len;
  25
  26       memmove(moveto, entry, *argz + *argz_len - entry);
  27
  28       *argz_len -= len;
  29
  30       if(!(*argz = (char *)realloc(*argz, *argz_len)))
  31         return ENOMEM;
  32
  33       if (*argz_len <= 0)
  34         {
  35           free(*argz);
  36           *argz = NULL;
  37         }
  38     }
  39   return 0;
  40 }