bool TIFF_Manager::DecodeString ( const void * encodedPtr, size_t encodedLen, std::string* utf8Str ) const
{
XMP_StringPtr typePtr = (XMP_StringPtr)encodedPtr;
XMP_StringPtr valuePtr = typePtr + 8;
size_t valueLen = encodedLen - 8;
utf8Str->erase();
if ( *typePtr == 'A' ) {
utf8Str->assign ( valuePtr, valueLen );
return true;
} else if ( *typePtr == 'U' ) {
try {
const UTF16Unit * utf16Ptr = (const UTF16Unit *) valuePtr;
size_t utf16Len = valueLen >> 1; // The number of UTF-16 storage units, not bytes.
if ( utf16Len == 0 ) return false;
bool isBigEndian = this->bigEndian; // Default to stream endian, unless there is a BOM ...
if ( (*utf16Ptr == 0xFEFF) || (*utf16Ptr == 0xFFFE) ) { // Check for an explicit BOM
isBigEndian = (*((XMP_Uns8*)utf16Ptr) == 0xFE);
utf16Ptr += 1; // Don't translate the BOM.
utf16Len -= 1;
if ( utf16Len == 0 ) return false;
}
UTF16_to_UTF8 ( utf16Ptr, utf16Len, isBigEndian, utf8Str );
return true;
} catch ( ... ) {
return false; // Ignore the tag if there are conversion errors.
}
} else if ( *typePtr == 'J' ) {
bool TIFF_Manager::DecodeString ( const void * encodedPtr, size_t encodedLen, std::string* utf8Str ) const
{
XMP_StringPtr typePtr = (XMP_StringPtr)encodedPtr;
XMP_StringPtr valuePtr = typePtr + 8;
size_t valueLen = encodedLen - 8;
utf8Str->erase();
if ( *typePtr == 'A' ) {
utf8Str->assign ( valuePtr, valueLen );
return true;
} else if ( *typePtr == 'U' ) {
try {
const UTF16Unit * utf16Ptr = (const UTF16Unit *) valuePtr;
size_t utf16Len = valueLen >> 1; // The number of UTF-16 storage units, not bytes.
UTF16_to_UTF8 ( utf16Ptr, utf16Len, this->bigEndian, utf8Str );
return true;
} catch ( ... ) {
return false; // Ignore the tag if there are conversion errors.
}
} else if ( *typePtr == 'J' ) {