reactos/sdk/lib/crt/stdlib/mbstowcs.c

#include <precomp.h>

/*********************************************************************
 * _mbstowcs_l
 */
size_t CDECL _mbstowcs_l(wchar_t *wcstr, const char *mbstr,
        size_t count, _locale_t locale)
{
    MSVCRT_pthreadlocinfo locinfo;
    size_t i, size;

    if(!locale)
        locinfo = get_locinfo();
    else
        locinfo = ((MSVCRT__locale_t)locale)->locinfo;

    /* Ignore count parameter */
    if(!wcstr)
        return MultiByteToWideChar(locinfo->lc_codepage, 0, mbstr, -1, NULL, 0)-1;

    for(i=0, size=0; i<count; i++) {
        if(mbstr[size] == '\0')
            break;

        size += (_isleadbyte_l((unsigned char)mbstr[size], locale) ? 2 : 1);
    }

    size = MultiByteToWideChar(locinfo->lc_codepage, 0,
            mbstr, size, wcstr, count);

    if(size<count && wcstr)
        wcstr[size] = '\0';

    return size;
}

/*
 * @implemented
 */
size_t mbstowcs (wchar_t *widechar, const char *multibyte, size_t number)
{
    return _mbstowcs_l(widechar, multibyte, number, NULL);
}