Age Owner TLA 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
6755 neilc 40 UBC 0 : pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n)
41 : {
9156 scrappy 42 0 : if (n == 0)
8986 bruce 43 0 : return 0;
44 : do
45 : {
9156 scrappy 46 0 : if (*s1 != *s2++)
8050 tgl 47 0 : return (*s1 - *(s2 - 1));
9156 scrappy 48 0 : if (*s1++ == 0)
49 0 : break;
50 0 : } while (--n != 0);
8986 bruce 51 0 : return 0;
52 : }
53 :
54 : int
6755 neilc 55 CBC 837 : pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n)
56 : {
9156 scrappy 57 837 : if (n == 0)
8986 bruce 58 UBC 0 : return 0;
59 : do
60 : {
8050 tgl 61 CBC 1391 : if ((pg_wchar) ((unsigned char) *s1) != *s2++)
62 704 : return ((pg_wchar) ((unsigned char) *s1) - *(s2 - 1));
9156 scrappy 63 687 : if (*s1++ == 0)
9156 scrappy 64 UBC 0 : break;
9156 scrappy 65 CBC 687 : } while (--n != 0);
8986 bruce 66 133 : return 0;
67 : }
68 :
69 : size_t
6755 neilc 70 UBC 0 : pg_wchar_strlen(const pg_wchar *str)
71 : {
72 : const pg_wchar *s;
73 :
8050 tgl 74 0 : for (s = str; *s; ++s)
75 : ;
8986 bruce 76 0 : return (s - str);
77 : }
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