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ntdll: Provide some Unicode helpers for Unix libs. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-10-06 16:19:58 +02:00 committed by Alexandre Julliard
parent 65ce784ffa
commit 1be12eaa94
1 changed files with 71 additions and 30 deletions
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101
dlls/ntdll/unix/env.c
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@ -644,37 +644,11 @@ DWORD ntdll_umbstowcs( const char *src, DWORD srclen, WCHAR *dst, DWORD dstlen )
} }
else /* utf-8 */ else /* utf-8 */
{ {
unsigned int res; reslen = 0;
const char *srcend = src + srclen; RtlUTF8ToUnicodeN( dst, dstlen * sizeof(WCHAR), &reslen, src, srclen );
WCHAR *dstend = dst + dstlen; reslen /= sizeof(WCHAR);
while ((dst < dstend) && (src < srcend))
{
unsigned char ch = *src++;
if (ch < 0x80) /* special fast case for 7-bit ASCII */
{
*dst++ = ch;
continue;
}
if ((res = decode_utf8_char( ch, &src, srcend )) <= 0xffff)
{
*dst++ = res;
}
else if (res <= 0x10ffff) /* we need surrogates */
{
res -= 0x10000;
*dst++ = 0xd800 | (res >> 10);
if (dst == dstend) break;
*dst++ = 0xdc00 | (res & 0x3ff);
}
else
{
*dst++ = 0xfffd;
}
}
reslen = dstlen - (dstend - dst);
#ifdef __APPLE__ /* work around broken Mac OS X filesystem that enforces NFD */ #ifdef __APPLE__ /* work around broken Mac OS X filesystem that enforces NFD */
if (reslen && nfc_table) reslen = compose_string( nfc_table, dst - reslen, reslen ); if (reslen && nfc_table) reslen = compose_string( nfc_table, dst, reslen );
#endif #endif
} }
return reslen; return reslen;
@ -2486,3 +2460,70 @@ NTSTATUS WINAPI NtQueryInstallUILanguage( LANGID *lang )
*lang = system_ui_language; *lang = system_ui_language;
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }
WCHAR WINAPI RtlUpcaseUnicodeChar( WCHAR wch )
{
return ntdll_towupper( wch );
}
WCHAR WINAPI RtlDowncaseUnicodeChar( WCHAR wch )
{
return ntdll_towlower( wch );
}
NTSTATUS WINAPI RtlUTF8ToUnicodeN( WCHAR *dst, DWORD dstlen, DWORD *reslen, const char *src, DWORD srclen )
{
unsigned int res, len;
NTSTATUS status = STATUS_SUCCESS;
const char *srcend = src + srclen;
WCHAR *dstend;
if (!src) return STATUS_INVALID_PARAMETER_4;
if (!reslen) return STATUS_INVALID_PARAMETER;
dstlen /= sizeof(WCHAR);
dstend = dst + dstlen;
if (!dst)
{
for (len = 0; src < srcend; len++)
{
unsigned char ch = *src++;
if (ch < 0x80) continue;
if ((res = decode_utf8_char( ch, &src, srcend )) > 0x10ffff)
status = STATUS_SOME_NOT_MAPPED;
else
if (res > 0xffff) len++;
}
*reslen = len * sizeof(WCHAR);
return status;
}
while ((dst < dstend) && (src < srcend))
{
unsigned char ch = *src++;
if (ch < 0x80) /* special fast case for 7-bit ASCII */
{
*dst++ = ch;
continue;
}
if ((res = decode_utf8_char( ch, &src, srcend )) <= 0xffff)
{
*dst++ = res;
}
else if (res <= 0x10ffff) /* we need surrogates */
{
res -= 0x10000;
*dst++ = 0xd800 | (res >> 10);
if (dst == dstend) break;
*dst++ = 0xdc00 | (res & 0x3ff);
}
else
{
*dst++ = 0xfffd;
status = STATUS_SOME_NOT_MAPPED;
}
}
if (src < srcend) status = STATUS_BUFFER_TOO_SMALL; /* overflow */
*reslen = (dstlen - (dstend - dst)) * sizeof(WCHAR);
return status;
}