strrchr.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 : strrchr.c
- Author : Richard A. O'Keefe.
- Updated: 10 April 1984
- Defines: strrchr(), rindex()
- strrchr(s, c) returns a pointer to the last place in s where c
- occurs, or NullS if c does not occur in s. This function is called
- rindex in V7 and 4.?bsd systems; while not ideal the name is clearer
- than strrchr, so rindex remains in strings.h as a macro. NB:
- strrchr looks for single characters, not for sets or strings. The
- parameter 'c' is declared 'int' so it will go in a register; if your
- C compiler is happy with register char change it to that.
- */
- #include "strings.h"
- char *strrchr(register const char *s, register pchar c)
- {
- reg3 char *t;
- t = NullS;
- do if (*s == (char) c) t = (char*) s; while (*s++);
- return (char*) t;
- }