reactos/sdk/lib/crt/mbstring/mbclen.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: lib/sdk/crt/mbstring/mbclen.c
* PURPOSE: Determines the length of a multi byte character
* PROGRAMERS:
* Copyright 1999 Alexandre Julliard
* Copyright 2000 Jon Griffths
*
*/
#include <precomp.h>
#include <mbstring.h>
/*
* @implemented
*/
size_t _mbclen(const unsigned char *s)
{
return _ismbblead(*s) ? 2 : 1;
}
size_t _mbclen2(const unsigned int s)
{
return (_ismbblead(s>>8) && _ismbbtrail(s&0x00FF)) ? 2 : 1;
}
/*
* assume MB_CUR_MAX == 2
*
* @implemented
*/
int mblen( const char *str, size_t size )
{
if (str && *str && size)
{
return !isleadbyte((unsigned char)*str) ? 1 : (size>1 ? 2 : -1);
}
return 0;
}
size_t __cdecl mbrlen(const char *str, size_t len, mbstate_t *state)
{
mbstate_t s = (state ? *state : 0);
size_t ret;
if(!len || !str || !*str)
return 0;
if(get_locinfo()->mb_cur_max == 1) {
return 1;
}else if(!s && isleadbyte((unsigned char)*str)) {
if(len == 1) {
s = (unsigned char)*str;
ret = -2;
}else {
ret = 2;
}
}else if(!s) {
ret = 1;
}else {
s = 0;
ret = 2;
}
if(state)
*state = s;
return ret;
}