compiler/stdc/strndup.c

   1 /*
   2     Copyright © 1995-2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     POSIX.1-2008 function strndup().
   6 */
   7
   8 #include <stdlib.h>
   9
  10 /*****************************************************************************
  11
  12     NAME */
  13 #include <string.h>
  14
  15         char * strndup (
  16
  17 /*  SYNOPSIS */
  18         const char *s, size_t n)
  19
  20 /*  FUNCTION
  21         Create a copy of a string. The copy can be freed with free() or will
  22         be freed when then program ends. The copy will be at most n character
  23         long, excluding the trailing \000
  24
  25     INPUTS
  26         s - String to duplicate
  27         n - Maximum length
  28
  29     RESULT
  30         A copy of the string which can be freed with free().
  31
  32     NOTES
  33
  34     EXAMPLE
  35
  36     BUGS
  37
  38     SEE ALSO
  39
  40     INTERNALS
  41
  42 ******************************************************************************/
  43 {
  44     char * copy;
  45     int len = strlen(s);
  46
  47     if (len > n)
  48         len = n;
  49
  50     if ((copy = malloc (len+1)))
  51     {
  52         memcpy(copy, s, len);
  53         copy[len] = 0;
  54     }
  55
  56     return copy;
  57 } /* strndup */
  58