strcmp.c
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上传日期:2022-05-23
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- /* 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 : strcmp.c
- Author : Richard A. O'Keefe.
- Updated: 10 April 1984
- Defines: strcmp()
- strcmp(s, t) returns > 0, = 0, or < 0 when s > t, s = t, or s < t
- according to the ordinary lexicographical order. To test for
- equality, the macro streql(s,t) is clearer than !strcmp(s,t). Note
- that if the string contains characters outside the range 0..127 the
- result is machine-dependent; PDP-11s and VAXen use signed bytes,
- some other machines use unsigned bytes.
- */
- #include "strings.h"
- int strcmp(register const char *s, register const char *t)
- {
- while (*s == *t++) if (!*s++) return 0;
- return s[0]-t[-1];
- }