newlib/libc/argz/argz_next.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 char *
  14 argz_next (char *argz,
  15        size_t argz_len,
  16        const char *entry)
  17 {
  18   if (entry)
  19     {
  20       while(*entry != '\0')
  21         entry++;
  22       entry++;
  23
  24       if (entry >= argz + argz_len)
  25         return NULL;
  26       else
  27         return (char *) entry;
  28     }
  29   else
  30     {
  31       if (argz_len > 0)
  32         return (char *) argz;
  33       else
  34         return NULL;
  35     }
  36 }