Line data    Source code

       1              : /*
       2              :  * src/backend/utils/mb/wstrncmp.c
       3              :  *
       4              :  *
       5              :  * Copyright (c) 1989, 1993
       6              :  *  The Regents of the University of California.  All rights reserved.
       7              :  *
       8              :  * This code is derived from FreeBSD 2.2.1-RELEASE software.
       9              :  *
      10              :  * Redistribution and use in source and binary forms, with or without
      11              :  * modification, are permitted provided that the following conditions
      12              :  * are met:
      13              :  * 1. Redistributions of source code must retain the above copyright
      14              :  *    notice, this list of conditions and the following disclaimer.
      15              :  * 2. Redistributions in binary form must reproduce the above copyright
      16              :  *    notice, this list of conditions and the following disclaimer in the
      17              :  *    documentation and/or other materials provided with the distribution.
      18              :  * 3. Neither the name of the University nor the names of its contributors
      19              :  *    may be used to endorse or promote products derived from this software
      20              :  *    without specific prior written permission.
      21              :  *
      22              :  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      23              :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      24              :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      25              :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      26              :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      27              :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      28              :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      29              :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      30              :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      31              :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      32              :  * SUCH DAMAGE.
      33              :  */
      34              : /* can be used in either frontend or backend */
      35              : #include "postgres_fe.h"
      36              : 
      37              : #include "mb/pg_wchar.h"
      38              : 
      39              : int
      40            0 : pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n)
      41              : {
      42            0 :     if (n == 0)
      43            0 :         return 0;
      44              :     do
      45              :     {
      46            0 :         if (*s1 != *s2++)
      47            0 :             return (*s1 - *(s2 - 1));
      48            0 :         if (*s1++ == 0)
      49            0 :             break;
      50            0 :     } while (--n != 0);
      51            0 :     return 0;
      52              : }
      53              : 
      54              : int
      55          843 : pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n)
      56              : {
      57          843 :     if (n == 0)
      58            0 :         return 0;
      59              :     do
      60              :     {
      61         1490 :         if ((pg_wchar) ((unsigned char) *s1) != *s2++)
      62          689 :             return ((pg_wchar) ((unsigned char) *s1) - *(s2 - 1));
      63          801 :         if (*s1++ == 0)
      64            0 :             break;
      65          801 :     } while (--n != 0);
      66          154 :     return 0;
      67              : }
      68              : 
      69              : size_t
      70            0 : pg_wchar_strlen(const pg_wchar *str)
      71              : {
      72              :     const pg_wchar *s;
      73              : 
      74            0 :     for (s = str; *s; ++s)
      75              :         ;
      76            0 :     return (s - str);
      77              : }