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/*
* libthai - Thai Language Support Library
* Copyright (C) 2001 Theppitak Karoonboonyanan <thep@linux.thai.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* thwcoll.h - Thai wide-char string collation
* Created: 2001-05-17
*/
#ifndef THAI_THWCOLL_H
#define THAI_THWCOLL_H
#include <thai/thailib.h>
BEGIN_CDECL
/**
* @file thwcoll.h
* @brief Thai wide-char string collation
*/
/**
* @brief Compare two Thai wide-char strings for collation
*
* @param s1 : first wide-char string (null-terminated)
* @param s2 : second wide-char string (null-terminated)
*
* @return < 0 if @a s1 precedes @a s2; 0 if @a s1 equals @a s2;
* > 0 if @a s1 succeeds @a s2
*/
extern int th_wcstrcoll(const thwchar_t *s1, const thwchar_t *s2);
/**
* @brief Transform wide-char string into collatable form
*
* @param dest : the destination wide-char string buffer
* @param src : the wide-char string to transform
* @param n : the size of @a dest buffer (as number of elements)
*
* @returns the number of elements required to store the result in @a dest,
* excluding the terminating '\\0'.
* If the return value >= @a n, @a dest is undefined.
*
* Transforms @a src into a form from which comparison using wcscmp() yields
* the same result as that from th_wcstrcoll(). At most @a n characters are
* put in @a dest.
*/
extern size_t th_wcstrxfrm(thwchar_t dest[], const thwchar_t *src, size_t n);
END_CDECL
#endif /* THAI_THCOLL_H */
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