bchange.c
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上传日期:2022-05-23
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文件大小:1k
- /* Copyright (C) 2000 MySQL AB
- 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; either version 2 of the License, or
- (at your option) any later version.
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /* File : bchange.c
- Author : Michael widenius
- Updated: 1987-03-20
- Defines: bchange()
- bchange(dst, old_length, src, new_length, tot_length)
- replaces old_length characters at dst to new_length characters from
- src in a buffer with tot_length bytes.
- */
- #include <my_global.h>
- #include "m_string.h"
- void bchange(register char *dst, uint old_length, register const char *src,
- uint new_length, uint tot_length)
- {
- uint rest=tot_length-old_length;
- if (old_length < new_length)
- bmove_upp(dst+rest+new_length,dst+tot_length,rest);
- else
- bmove(dst+new_length,dst+old_length,rest);
- memcpy(dst,src,new_length);
- }