argp/strndup.c

   1 /* strndup.c
   2  *
   3  */
   4
   5 /* Written by Niels Möller <nisse@lysator.liu.se>
   6  *
   7  * This file is hereby placed in the public domain.
   8  */
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 char *
  14 strndup (const char *s, size_t size)
  15 {
  16   char *r;
  17   char *end = memchr(s, 0, size);
  18
  19   if (end)
  20     /* Length + 1 */
  21     size = end - s + 1;
  22
  23   r = malloc(size);
  24
  25   if (size)
  26     {
  27       memcpy(r, s, size-1);
  28       r[size-1] = '\0';
  29     }
  30   return r;
  31 }