strnmov.c

/* Copyright (c) 2000, 2001, 2006, 2007 MySQL AB
   Use is subject to license terms.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

/*
    strnmov(dst,src,length) moves length characters, or until end, of src to
    dst and appends a closing NUL to dst if src is shorter than length.
    The result is a pointer to the first NUL in dst, or is dst+n if dst was
    truncated.
*/

#include <my_global.h>
#include "m_string.h"

char *strnmov(register char *dst, register const char *src, size_t n)
{
  while (n-- != 0) {
    if (!(*dst++ = *src++)) {
      return (char*) dst-1;
    }
  }
  return dst;
}