Function PAR_datatype

src/jrd/par.cpp:253–399

Parse a BLR datatype. Return the alignment requirements of the datatype.

// Parse a BLR datatype. Return the alignment requirements of the datatype.
USHORT PAR_datatype(BlrReader& blrReader, dsc* desc)
{
	desc->clear();

	const USHORT dtype = blrReader.getByte();
	USHORT textType;

	switch (dtype)
	{
		case blr_text:
			desc->makeText(blrReader.getWord(), ttype_dynamic);
			desc->dsc_flags |= DSC_no_subtype;
			break;

		case blr_cstring:
			desc->dsc_dtype = dtype_cstring;
			desc->dsc_flags |= DSC_no_subtype;
			desc->dsc_length = blrReader.getWord();
			desc->setTextType(ttype_dynamic);
			break;

		case blr_varying:
			desc->makeVarying(blrReader.getWord(), ttype_dynamic);
			desc->dsc_flags |= DSC_no_subtype;
			break;

		case blr_text2:
			textType = blrReader.getWord();
			desc->makeText(blrReader.getWord(), textType);
			break;

		case blr_cstring2:
			desc->dsc_dtype = dtype_cstring;
			desc->setTextType(blrReader.getWord());
			desc->dsc_length = blrReader.getWord();
			break;

		case blr_varying2:
			textType = blrReader.getWord();
			desc->makeVarying(blrReader.getWord(), textType);
			break;

		case blr_short:
			desc->dsc_dtype = dtype_short;
			desc->dsc_length = sizeof(SSHORT);
			desc->dsc_scale = (int) blrReader.getByte();
			break;

		case blr_long:
			desc->dsc_dtype = dtype_long;
			desc->dsc_length = sizeof(SLONG);
			desc->dsc_scale = (int) blrReader.getByte();
			break;

		case blr_int64:
			desc->dsc_dtype = dtype_int64;
			desc->dsc_length = sizeof(SINT64);
			desc->dsc_scale = (int) blrReader.getByte();