copy_string.c

   1 /*
   2  * libpri: An implementation of Primary Rate ISDN
   3  *
   4  * Written by Mark Spencer <markster@digium.com>
   5  *
   6  * Copyright (C) 2005, Digium, Inc.
   7  * All Rights Reserved.
   8  */
   9
  10 /*
  11  * See http://www.asterisk.org for more information about
  12  * the Asterisk project. Please do not directly contact
  13  * any of the maintainers of this project for assistance;
  14  * the project provides a web site, mailing lists and IRC
  15  * channels for your use.
  16  *
  17  * This program is free software, distributed under the terms of
  18  * the GNU General Public License Version 2 as published by the
  19  * Free Software Foundation. See the LICENSE file included with
  20  * this program for more details.
  21  *
  22  * In addition, when this program is distributed with Asterisk in
  23  * any form that would qualify as a 'combined work' or as a
  24  * 'derivative work' (but not mere aggregation), you can redistribute
  25  * and/or modify the combination under the terms of the license
  26  * provided with that copy of Asterisk, instead of the license
  27  * terms granted here.
  28  */
  29
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33
  34 #include "compiler.h"
  35 #include "libpri.h"
  36 #include "pri_internal.h"
  37
  38 void libpri_copy_string(char *dst, const char *src, size_t size)
  39 {
  40         while (*src && size) {
  41                 *dst++ = *src++;
  42                 size--;
  43         }
  44         if (__builtin_expect(!size, 0))
  45                 dst--;
  46         *dst = '\0';
  47 }