UChar TextEncoding::backslashAsCurrencySymbol() const
{
return shouldShowBackslashAsCurrencySymbolIn(m_name) ? 0x00A5 : '\\';
}
CString TextCodecICU::encode(const UChar* characters, size_t length, UnencodableHandling handling)
{
if (!length)
return "";
if (!m_converterICU)
createICUConverter();
if (!m_converterICU)
return CString();
// FIXME: We should see if there is "force ASCII range" mode in ICU;
// until then, we change the backslash into a yen sign.
// Encoding will change the yen sign back into a backslash.
String copy;
const UChar* source;
const UChar* sourceLimit;
if (shouldShowBackslashAsCurrencySymbolIn(m_encodingName)) {
copy.append(characters, length);
copy.replace('\\', 0xA5);
source = copy.characters();
sourceLimit = source + copy.length();
} else {
source = characters;
sourceLimit = source + length;
}
UErrorCode err = U_ZERO_ERROR;
switch (handling) {
case QuestionMarksForUnencodables:
ucnv_setSubstChars(m_converterICU, "?", 1, &err);
ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkCallbackSubstitute : UCNV_FROM_U_CALLBACK_SUBSTITUTE, 0, 0, 0, &err);
break;
case EntitiesForUnencodables:
ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkCallbackEscape : UCNV_FROM_U_CALLBACK_ESCAPE, UCNV_ESCAPE_XML_DEC, 0, 0, &err);
break;
case URLEncodedEntitiesForUnencodables:
ucnv_setFromUCallBack(m_converterICU, m_needsGBKFallbacks ? gbkUrlEscapedEntityCallack : urlEscapedEntityCallback, 0, 0, 0, &err);
break;
}
ASSERT(U_SUCCESS(err));
if (U_FAILURE(err))
return CString();
Vector<char> result;
size_t size = 0;
do {
char buffer[ConversionBufferSize];
char* target = buffer;
char* targetLimit = target + ConversionBufferSize;
err = U_ZERO_ERROR;
ucnv_fromUnicode(m_converterICU, &target, targetLimit, &source, sourceLimit, 0, true, &err);
size_t count = target - buffer;
result.grow(size + count);
memcpy(result.data() + size, buffer, count);
size += count;
} while (err == U_BUFFER_OVERFLOW_ERROR);
return CString(result.data(), size);
}
