int DrawTextExA(
HDC hdc,
LPSTR lpchText,
int cchText,
LPRECT lprc,
UINT format,
LPDRAWTEXTPARAMS lpdtp)
{
LPWSTR lpwstr;
int iRet;
int iUniString;
WORD wCodePage = (WORD)GdiGetCodePage(hdc);
if (cchText == -1) {
// USER_AWCONV_COUNTSTRINGSZ does not count/convert trailing \0.
cchText = USER_AWCONV_COUNTSTRINGSZ;
} else if (cchText < -1) {
return 0;
}
if ((iUniString = MBToWCSEx(wCodePage, lpchText, cchText, &lpwstr, -1, TRUE)) == 0) {
if (cchText == USER_AWCONV_COUNTSTRINGSZ) {
lpwstr = (LPWSTR)gwszNullStr;
format &= ~DT_MODIFYSTRING;
} else {
return 0;
}
}
/*
* Grow the buffer to accomodate the ellipsis (see AddEllipsisAndDrawLine)
*/
if (format & DT_MODIFYSTRING) {
int iNewLen = (iUniString + CCHELLIPSIS + 1) * sizeof(*lpwstr);
LPWSTR lpwstrNew = UserLocalReAlloc(lpwstr, iNewLen, HEAP_ZERO_MEMORY);
if (lpwstrNew == NULL) {
UserLocalFree((HANDLE)lpwstr);
return FALSE;
}
lpwstr = lpwstrNew;
}
iRet = DrawTextExWorker(hdc, lpwstr, iUniString, lprc, format, lpdtp, GetTextCharset(hdc));
if (format & DT_MODIFYSTRING) {
/*
* Note that if the buffer grew and the caller provided the string size,
* then we won't return the additional characters... fixing this
* might break some apps so let's leave it alone until some one complains
*/
if (cchText < 0) {
UserAssert(cchText == USER_AWCONV_COUNTSTRINGSZ);
// Guess how many bytes we can put in the buffer...
// We can safely assume the maximum bytes available.
// At worst, even for DBCS, the buffer size required
// will be smaller than or equal to the orignal size,
// because some DBCS characters would be substituted
// to SBC ".", which is one byte each.
// On the other hand, the number of characters converted
// is limited by both iUniString and cchText.
//
if (IS_DBCS_ENABLED()) {
cchText = iUniString * DBCS_CHARSIZE;
} else {
cchText = iUniString * sizeof(CHAR);
}
}
WCSToMBEx(wCodePage, lpwstr, iUniString, &lpchText, cchText, FALSE);
}
if (lpwstr != gwszNullStr) {
UserLocalFree((HANDLE)lpwstr);
}
return iRet;
}
int zMBToWCSEx (WORD wCodePage, LPCSTR pAnsiString, int nAnsiChar, LPWSTR *ppUnicodeString, int cbUnicodeChar, BOOL bAllocateMem)
{
return (MBToWCSEx (wCodePage, pAnsiString, nAnsiChar, ppUnicodeString, cbUnicodeChar, bAllocateMem));
}
