firebird-mirror/src/dsql/sqlda.h

/*
 *	PROGRAM:	C preprocessor
 *	MODULE:		sqlda.h
 *	DESCRIPTION:	DSQL definitions for non-DSQL modules
 *
 * The contents of this file are subject to the Interbase Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy
 * of the License at http://www.Inprise.com/IPL.html
 *
 * Software distributed under the License is distributed on an
 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code was created by Inprise Corporation
 * and its predecessors. Portions created by Inprise Corporation are
 * Copyright (C) Inprise Corporation.
 *
 * All Rights Reserved.
 * Contributor(s): ______________________________________.
 */

#ifndef DSQL_SQLDA_H
#define DSQL_SQLDA_H

#include "../jrd/gds_proto.h"

// SQLDA dialects

const USHORT DIALECT_sqlda	= 0;
const USHORT DIALECT_xsqlda	= 1;

struct SQLVAR
{
	SSHORT	sqltype;
	SSHORT	sqllen;
	SCHAR*	sqldata;
	SSHORT*	sqlind;
	SSHORT	sqlname_length;
	SCHAR	sqlname[30];
};

struct SQLDA
{
	SCHAR	sqldaid[8];
	SLONG	sqldabc;
	SSHORT	sqln;
	SSHORT	sqld;
	SQLVAR	sqlvar[1];
};

#define SQLDA_LENGTH(n)		(sizeof (SQLDA) + (n - 1) * sizeof (SQLVAR))

// Structure to support conversion of SQLDA's to messages

// enum would be troblesome here
const USHORT DASUP_CLAUSE_select	= 0;
const USHORT DASUP_CLAUSE_bind		= 1;

struct sqlda_sup
{
	struct dasup_clause
	{
		SCHAR*	dasup_blr;
		SCHAR*	dasup_msg;
		USHORT	dasup_blr_length;
		USHORT	dasup_blr_buf_len;
		USHORT	dasup_msg_buf_len;

		SCHAR*	dasup_info_buf;
		USHORT	dasup_info_len;
	} dasup_clauses[2];

	USHORT	dasup_dialect;		// Dialect associated with statement
	USHORT	dasup_stmt_type;	// Type of statement

public:
	sqlda_sup()
	{
		init();
	}

	void reset()
	{
		release();
		init();
	}

	~sqlda_sup()
	{
		release();
	}

private:
	void freeIfSet(SCHAR** pMem)
	{
		if (*pMem)
		{
			gds__free(*pMem);
			*pMem = 0;
		}
	}

	void init()
	{
		memset(dasup_clauses, 0, sizeof(dasup_clauses));
		dasup_dialect = 0;
		dasup_stmt_type = 0;
	}

	void release()
	{
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_bind].dasup_blr);
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_select].dasup_blr);
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_bind].dasup_msg);
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_select].dasup_msg);
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_bind].dasup_info_buf);
		freeIfSet(&dasup_clauses[DASUP_CLAUSE_select].dasup_info_buf);
	}
};

#include "../dsql/sqlda_pub.h"

#endif // DSQL_SQLDA_H