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       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                 :           0 : }