// Combines both gbkUrlEscapedEntityCallback and GBK character substitution.
static void gbkUrlEscapedEntityCallack(const void* context, UConverterFromUnicodeArgs* fromUArgs, const UChar* codeUnits, int32_t length,
UChar32 codePoint, UConverterCallbackReason reason, UErrorCode* err)
{
if (reason == UCNV_UNASSIGNED) {
if (UChar outChar = fallbackForGBK(codePoint)) {
const UChar* source = &outChar;
*err = U_ZERO_ERROR;
ucnv_cbFromUWriteUChars(fromUArgs, &source, source + 1, 0, err);
return;
}
urlEscapedEntityCallback(context, fromUArgs, codeUnits, length, codePoint, reason, err);
return;
}
UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length, codePoint, reason, err);
}
// Generic helper for writing escaped entities using the specfied
// UnencodableHandling.
static void formatEscapedEntityCallback(const void* context,
UConverterFromUnicodeArgs* fromUArgs,
const UChar* codeUnits,
int32_t length,
UChar32 codePoint,
UConverterCallbackReason reason,
UErrorCode* err,
UnencodableHandling handling) {
if (reason == UCNV_UNASSIGNED) {
*err = U_ZERO_ERROR;
UnencodableReplacementArray entity;
int entityLen =
TextCodec::getUnencodableReplacement(codePoint, handling, entity);
ucnv_cbFromUWriteBytes(fromUArgs, entity, entityLen, 0, err);
} else {
UCNV_FROM_U_CALLBACK_ESCAPE(context, fromUArgs, codeUnits, length,
codePoint, reason, err);
}
}