lib/libc/time/ialloc.c

   1 /*      $NetBSD: ialloc.c,v 1.9 2012/10/26 18:29:34 christos Exp $      */
   2 /*
   3 ** This file is in the public domain, so clarified as of
   4 ** 2006-07-17 by Arthur David Olson.
   5 */
   6
   7 #if HAVE_NBTOOL_CONFIG_H
   8 #include "nbtool_config.h"
   9 #endif
  10
  11 #include <sys/cdefs.h>
  12
  13 #if 0
  14 static char     elsieid[] = "@(#)ialloc.c       8.30";
  15 #else
  16 __RCSID("$NetBSD: ialloc.c,v 1.9 2012/10/26 18:29:34 christos Exp $");
  17 #endif
  18
  19 #include "private.h"
  20
  21 char *
  22 icatalloc(char *const old, const char *const new)
  23 {
  24         char *  result;
  25         int     oldsize, newsize;
  26
  27         newsize = (new == NULL) ? 0 : strlen(new);
  28         if (old == NULL)
  29                 oldsize = 0;
  30         else if (newsize == 0)
  31                 return old;
  32         else
  33                 oldsize = strlen(old);
  34         if ((result = realloc(old, oldsize + newsize + 1)) != NULL)
  35                 if (new != NULL)
  36                         (void) strcpy(result + oldsize, new); /* XXX strcpy is safe */
  37         return result;
  38 }
  39
  40 char *
  41 icpyalloc(const char *const string)
  42 {
  43         return icatalloc(NULL, string);
  44 }