Method parse

src/common/StatementMetadata.cpp:239–412

Parse an info response buffer.

// Parse an info response buffer.
void StatementMetadata::parse(unsigned bufferLength, const UCHAR* buffer)
{
	const UCHAR* bufferEnd = buffer + bufferLength;
	Parameters* parameters = NULL;
	bool finish = false;
	UCHAR c;

	while (!finish && buffer < bufferEnd && (c = *buffer++) != isc_info_end)
	{
		switch (c)
		{
			case isc_info_sql_stmt_type:
				type = getNumericInfo(&buffer, bufferEnd);
				break;

			case isc_info_sql_stmt_flags:
				flags = getNumericInfo(&buffer, bufferEnd);
				break;

			case isc_info_sql_get_plan:
			case isc_info_sql_explain_plan:
			{
				string* plan = (c == isc_info_sql_explain_plan ? &detailedPlan : &legacyPlan);
				getStringInfo(&buffer, bufferEnd, plan);
				break;
			}

			case isc_info_sql_select:
				parameters = outputParameters;
				break;

			case isc_info_sql_bind:
				parameters = inputParameters;
				break;

			case isc_info_sql_num_variables:
			case isc_info_sql_describe_vars:
			{
				if (!parameters)
				{
					finish = true;
					break;
				}

				getNumericInfo(&buffer, bufferEnd);	// skip the message index

				if (c == isc_info_sql_num_variables)
					continue;

				Parameters::Item temp(*getDefaultMemoryPool());
				Parameters::Item* param = &temp;
				bool finishDescribe = false;

				// Loop over the variables being described.
				while (!finishDescribe)
				{
					fb_assert(buffer < bufferEnd);