Method convertToUTF8

src/jrd/DataTypeUtil.cpp:366–403

Returns false if conversion is not needed.

// Returns false if conversion is not needed.
bool DataTypeUtil::convertToUTF8(const string& src, string& dst, CHARSET_ID charset, ErrorFunction err)
{
	thread_db* tdbb = JRD_get_thread_data();

	if (charset == CS_dynamic)
	{
		fb_assert(tdbb->getAttachment());
		charset = tdbb->getAttachment()->att_charset;
	}

	if (charset == CS_UTF8 || charset == CS_UNICODE_FSS)
		return false;

	if (charset == CS_NONE)
	{
		const FB_SIZE_T length = src.length();

		const char* s = src.c_str();
		char* p = dst.getBuffer(length);

		for (const char* end = src.end(); s < end; ++p, ++s)
			*p = (*s < 0 ? '?' : *s);
	}
	else // charset != CS_UTF8
	{
		DataTypeUtil dtUtil(tdbb);
		ULONG length = dtUtil.convertLength(src.length(), charset, CS_UTF8);

		length = INTL_convert_bytes(tdbb,
			CS_UTF8, (UCHAR*) dst.getBuffer(length), length,
			charset, (const BYTE*) src.begin(), src.length(),
			err);

		dst.resize(length);
	}

	return true;
}

}	// namespace Jrd