Line data    Source code

       1              : /*
       2              :  * src/backend/utils/mb/wstrcmp.c
       3              :  *
       4              :  *-
       5              :  * Copyright (c) 1990, 1993
       6              :  *  The Regents of the University of California.  All rights reserved.
       7              :  *
       8              :  * This code is derived from software contributed to Berkeley by
       9              :  * Chris Torek.
      10              :  *
      11              :  * Redistribution and use in source and binary forms, with or without
      12              :  * modification, are permitted provided that the following conditions
      13              :  * are met:
      14              :  * 1. Redistributions of source code must retain the above copyright
      15              :  *    notice, this list of conditions and the following disclaimer.
      16              :  * 2. Redistributions in binary form must reproduce the above copyright
      17              :  *    notice, this list of conditions and the following disclaimer in the
      18              :  *    documentation and/or other materials provided with the distribution.
      19              :  * 3. Neither the name of the University nor the names of its contributors
      20              :  *    may be used to endorse or promote products derived from this software
      21              :  *    without specific prior written permission.
      22              :  *
      23              :  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      24              :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      25              :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      26              :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      27              :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      28              :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      29              :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      30              :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      31              :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      32              :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      33              :  * SUCH DAMAGE.
      34              :  */
      35              : /* can be used in either frontend or backend */
      36              : #include "postgres_fe.h"
      37              : 
      38              : #include "mb/pg_wchar.h"
      39              : 
      40              : int
      41            0 : pg_char_and_wchar_strcmp(const char *s1, const pg_wchar *s2)
      42              : {
      43            0 :     while ((pg_wchar) *s1 == *s2++)
      44            0 :         if (*s1++ == 0)
      45            0 :             return 0;
      46            0 :     return *(const unsigned char *) s1 - *(const pg_wchar *) (s2 - 1);
      47              : }