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kernelbase: Implement URL_UNESCAPE_AS_UTF8 for UrlUnescapeW().

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This commit is contained in:
Jactry Zeng 2022-08-08 23:04:34 -05:00 • committed by Alexandre Julliard
parent 75d0ab0839
commit d482010042
1 changed files with 55 additions and 3 deletions
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58
dlls/kernelbase/path.c
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@ -2907,11 +2907,26 @@ HRESULT WINAPI UrlUnescapeA(char *url, char *unescaped, DWORD *unescaped_len, DW
return hr;
}
static int get_utf8_len(unsigned char code)
{
if (code < 0x80)
return 1;
else if ((code & 0xe0) == 0xc0)
return 2;
else if ((code & 0xf0) == 0xe0)
return 3;
else if ((code & 0xf8) == 0xf0)
return 4;
return 0;
}
HRESULT WINAPI UrlUnescapeW(WCHAR *url, WCHAR *unescaped, DWORD *unescaped_len, DWORD flags)
{
WCHAR *dst, next, utf16_buf[4];
BOOL stop_unescaping = FALSE;
int utf8_len, utf16_len, i;
const WCHAR *src;
WCHAR *dst, next;
char utf8_buf[4];
DWORD needed;
HRESULT hr;
@ -2930,6 +2945,7 @@ HRESULT WINAPI UrlUnescapeW(WCHAR *url, WCHAR *unescaped, DWORD *unescaped_len,
for (src = url, needed = 0; *src; src++, needed++)
{
utf16_len = 0;
if (flags & URL_DONT_UNESCAPE_EXTRA_INFO && (*src == '#' || *src == '?'))
{
stop_unescaping = TRUE;
@ -2939,17 +2955,53 @@ HRESULT WINAPI UrlUnescapeW(WCHAR *url, WCHAR *unescaped, DWORD *unescaped_len,
{
INT ih;
WCHAR buf[5] = L"0x";
memcpy(buf + 2, src + 1, 2*sizeof(WCHAR));
buf[4] = 0;
StrToIntExW(buf, STIF_SUPPORT_HEX, &ih);
next = (WCHAR) ih;
src += 2; /* Advance to end of escape */
if (flags & URL_UNESCAPE_AS_UTF8)
{
utf8_buf[0] = ih;
utf8_len = get_utf8_len(ih);
for (i = 1; i < utf8_len && *(src + 1) == '%' && *(src + 2) && *(src + 3); i++)
{
memcpy(buf + 2, src + 2, 2 * sizeof(WCHAR));
StrToIntExW(buf, STIF_SUPPORT_HEX, &ih);
/* Check if it is a valid continuation byte. */
if ((ih & 0xc0) == 0x80)
{
utf8_buf[i] = ih;
src += 3;
}
else
break;
}
utf16_len = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
utf8_buf, i, utf16_buf, ARRAYSIZE(utf16_buf));
if (utf16_len)
needed += utf16_len - 1;
else
next = 0xfffd;
}
else
next = (WCHAR) ih;
}
else
next = *src;
if (flags & URL_UNESCAPE_INPLACE || needed < *unescaped_len)
*dst++ = next;
{
if (utf16_len)
{
memcpy(dst, utf16_buf, utf16_len * sizeof(*utf16_buf));
dst += utf16_len;
}
else
*dst++ = next;
}
}
if (flags & URL_UNESCAPE_INPLACE || needed < *unescaped_len)