| /* |
| * $PostgreSQL: pgsql/src/backend/utils/mb/wstrncmp.c,v 1.10 2009/06/11 14:49:06 momjian Exp $ |
| * |
| * |
| * Copyright (c) 1989, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * This code is derived from FreeBSD 2.2.1-RELEASE software. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| /* can be used in either frontend or backend */ |
| #include "postgres_fe.h" |
| |
| #include "mb/pg_wchar.h" |
| |
| int |
| pg_wchar_strncmp(const pg_wchar *s1, const pg_wchar *s2, size_t n) |
| { |
| if (n == 0) |
| return 0; |
| do |
| { |
| if (*s1 != *s2++) |
| return (*s1 - *(s2 - 1)); |
| if (*s1++ == 0) |
| break; |
| } while (--n != 0); |
| return 0; |
| } |
| |
| int |
| pg_char_and_wchar_strncmp(const char *s1, const pg_wchar *s2, size_t n) |
| { |
| if (n == 0) |
| return 0; |
| do |
| { |
| if ((pg_wchar) ((unsigned char) *s1) != *s2++) |
| return ((pg_wchar) ((unsigned char) *s1) - *(s2 - 1)); |
| if (*s1++ == 0) |
| break; |
| } while (--n != 0); |
| return 0; |
| } |
| |
| size_t |
| pg_wchar_strlen(const pg_wchar *str) |
| { |
| const pg_wchar *s; |
| |
| for (s = str; *s; ++s) |
| ; |
| return (s - str); |
| } |