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       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                 :           0 :         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                 :           0 : }
      53                 :             : 
      54                 :             : int
      55                 :         134 : pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n)
      56                 :             : {
      57         [ +  - ]:         134 :         if (n == 0)
      58                 :           0 :                 return 0;
      59                 :         134 :         do
      60                 :             :         {
      61         [ +  + ]:         243 :                 if ((pg_wchar) ((unsigned char) *s1) != *s2++)
      62                 :         109 :                         return ((pg_wchar) ((unsigned char) *s1) - *(s2 - 1));
      63         [ -  + ]:         134 :                 if (*s1++ == 0)
      64                 :           0 :                         break;
      65         [ +  + ]:         134 :         } while (--n != 0);
      66                 :          25 :         return 0;
      67                 :         134 : }
      68                 :             : 
      69                 :             : size_t
      70                 :           0 : pg_wchar_strlen(const pg_wchar *str)
      71                 :             : {
      72                 :           0 :         const pg_wchar *s;
      73                 :             : 
      74         [ #  # ]:           0 :         for (s = str; *s; ++s)
      75                 :             :                 ;
      76                 :           0 :         return (s - str);
      77                 :           0 : }