newlib/libc/argz/argz_create_sep.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_sep (const char *string,
  15        int sep,
  16        char **argz,
  17        size_t *argz_len)
  18 {
  19   int len = 0;
  20   int i = 0;
  21   int num_strings = 0;
  22   char delim[2];
  23   char *running = 0;
  24   char *old_running = 0;
  25   char *token = 0;
  26   char *iter = 0;
  27
  28   *argz_len = 0;
  29
  30   if (!string || string[0] == '\0')
  31     {
  32       *argz= NULL;
  33       return 0;
  34     }
  35
  36   delim[0] = sep;
  37   delim[1] = '\0';
  38
  39   running = strdup(string);
  40   old_running = running;
  41
  42   while ((token = strsep(&running, delim)))
  43     {
  44       len = strlen(token);
  45       *argz_len += (len + 1);
  46       num_strings++;
  47     }
  48
  49   if(!(*argz = (char *)malloc(*argz_len)))
  50     return ENOMEM;
  51
  52   free(old_running);
  53
  54   running = strdup(string);
  55   old_running = running;
  56
  57   iter = *argz;
  58   for (i = 0; i < num_strings; i++)
  59     {
  60       token = strsep(&running, delim);
  61       len = strlen(token) + 1;
  62       memcpy(iter, token, len);
  63       iter += len;
  64     }
  65
  66   free(old_running);
  67   return 0;
  68 }