/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basic.hxx"


#include <tools/stream.hxx>
#include "sbcomp.hxx"
#include "iosys.hxx"

// Test, ob ein I/O-Channel angegeben wurde

sal_Bool SbiParser::Channel( sal_Bool bAlways )
{
	sal_Bool bRes = sal_False;
	Peek();
	if( IsHash() )
	{
		SbiExpression aExpr( this );
		while( Peek() == COMMA || Peek() == SEMICOLON )
			Next();
		aExpr.Gen();
		aGen.Gen( _CHANNEL );
		bRes = sal_True;
	}
	else if( bAlways )
		Error( SbERR_EXPECTED, "#" );
	return bRes;
}

// Fuer PRINT und WRITE wird bei Objektvariablen versucht,
// die Default-Property anzusprechen.

// PRINT

void SbiParser::Print()
{
	sal_Bool bChan = Channel();
	// Die Ausdruecke zum Drucken:
	while( !bAbort )
	{
		if( !IsEoln( Peek() ) )
		{
			SbiExpression* pExpr = new SbiExpression( this );
			pExpr->Gen();
			delete pExpr;
			Peek();
			aGen.Gen( eCurTok == COMMA ? _PRINTF : _BPRINT );
		}
		if( eCurTok == COMMA || eCurTok == SEMICOLON )
		{
			Next();
			if( IsEoln( Peek() ) ) break;
		}
		else
		{
			aGen.Gen( _PRCHAR, '\n' );
			break;
		}
	}
	if( bChan )
		aGen.Gen( _CHAN0 );
}

// WRITE #chan, expr, ...

void SbiParser::Write()
{
	sal_Bool bChan = Channel();
	// Die Ausdruecke zum Drucken:
	while( !bAbort )
	{
		SbiExpression* pExpr = new SbiExpression( this );
		pExpr->Gen();
		delete pExpr;
		aGen.Gen( _BWRITE );
		if( Peek() == COMMA )
		{
			aGen.Gen( _PRCHAR, ',' );
			Next();
			if( IsEoln( Peek() ) ) break;
		}
		else
		{
			aGen.Gen( _PRCHAR, '\n' );
			break;
		}
	}
	if( bChan )
		aGen.Gen( _CHAN0 );
}


// #i92642 Handle LINE keyword outside ::Next()
void SbiParser::Line()
{
	// #i92642: Special handling to allow name as symbol
	if( Peek() == INPUT )
	{
		Next();
		LineInput();
	}
	else
	{
		aGen.Statement();

		KeywordSymbolInfo aInfo;
		aInfo.m_aKeywordSymbol = String( RTL_CONSTASCII_USTRINGPARAM( "line" ) );
		aInfo.m_eSbxDataType = GetType();
		aInfo.m_eTok = SYMBOL;

		Symbol( &aInfo );
	}
}


// LINE INPUT [prompt], var$

void SbiParser::LineInput()
{
	Channel( sal_True );
	// sal_Bool bChan = Channel( sal_True );
	SbiExpression* pExpr = new SbiExpression( this, SbOPERAND );
	/* AB 15.1.96: Keinen allgemeinen Ausdruck mehr zulassen
	SbiExpression* pExpr = new SbiExpression( this );
	if( !pExpr->IsVariable() )
	{
		SbiToken eTok = Peek();
		if( eTok == COMMA || eTok == SEMICOLON ) Next();
		else Error( SbERR_EXPECTED, COMMA );
		// mit Prompt
		if( !bChan )
		{
			pExpr->Gen();
			aGen.Gen( _PROMPT );
		}
		else
			Error( SbERR_VAR_EXPECTED );
		delete pExpr;
		pExpr = new SbiExpression( this, SbOPERAND );
	}
	*/
	if( !pExpr->IsVariable() )
		Error( SbERR_VAR_EXPECTED );
	if( pExpr->GetType() != SbxVARIANT && pExpr->GetType() != SbxSTRING )
		Error( SbERR_CONVERSION );
	pExpr->Gen();
	aGen.Gen( _LINPUT );
	delete pExpr;
	aGen.Gen( _CHAN0 );		// ResetChannel() nicht mehr in StepLINPUT()
}

// INPUT

void SbiParser::Input()
{
	aGen.Gen( _RESTART );
	Channel( sal_True );
	// sal_Bool bChan = Channel( sal_True );
	SbiExpression* pExpr = new SbiExpression( this, SbOPERAND );
	/* ALT: Jetzt keinen allgemeinen Ausdruck mehr zulassen
	SbiExpression* pExpr = new SbiExpression( this );
	...
	siehe LineInput
	*/
	while( !bAbort )
	{
		if( !pExpr->IsVariable() )
			Error( SbERR_VAR_EXPECTED );
		pExpr->Gen();
		aGen.Gen( _INPUT );
		if( Peek() == COMMA )
		{
			Next();
			delete pExpr;
			pExpr = new SbiExpression( this, SbOPERAND );
		}
		else break;
	}
	delete pExpr;
	aGen.Gen( _CHAN0 );		// ResetChannel() nicht mehr in StepINPUT()
}

// OPEN stringexpr FOR mode ACCCESS access mode AS Channel [Len=n]

void SbiParser::Open()
{
	SbiExpression aFileName( this );
	SbiToken eTok;
	TestToken( FOR );
	short nMode = 0;
	short nFlags = 0;
	switch( Next() )
	{
		case INPUT:
			nMode = STREAM_READ;  nFlags |= SBSTRM_INPUT; break;
		case OUTPUT:
			nMode = STREAM_WRITE | STREAM_TRUNC; nFlags |= SBSTRM_OUTPUT; break;
		case APPEND:
			nMode = STREAM_WRITE; nFlags |= SBSTRM_APPEND; break;
		case RANDOM:
			nMode = STREAM_READ | STREAM_WRITE; nFlags |= SBSTRM_RANDOM; break;
		case BINARY:
			nMode = STREAM_READ | STREAM_WRITE; nFlags |= SBSTRM_BINARY; break;
		default:
			Error( SbERR_SYNTAX );
	}
	if( Peek() == ACCESS )
	{
		Next();
		eTok = Next();
		// #27964# Nur STREAM_READ,STREAM_WRITE-Flags in nMode beeinflussen
		nMode &= ~(STREAM_READ | STREAM_WRITE);		// loeschen
		if( eTok == READ )
		{
			if( Peek() == WRITE )
			{
				Next();
				nMode |= (STREAM_READ | STREAM_WRITE);
			}
			else
				nMode |= STREAM_READ;
		}
		else if( eTok == WRITE )
			nMode |= STREAM_WRITE;
		else
			Error( SbERR_SYNTAX );
	}
	switch( Peek() )
	{
#ifdef SHARED
#undef SHARED
#define tmpSHARED
#endif
		case SHARED:
			Next(); nMode |= STREAM_SHARE_DENYNONE; break;
#ifdef tmpSHARED
#define SHARED
#undef tmpSHARED
#endif
		case LOCK:
			Next();
			eTok = Next();
			if( eTok == READ )
			{
				if( Peek() == WRITE ) Next(), nMode |= STREAM_SHARE_DENYALL;
				else nMode |= STREAM_SHARE_DENYREAD;
			}
			else if( eTok == WRITE )
				nMode |= STREAM_SHARE_DENYWRITE;
			else
				Error( SbERR_SYNTAX );
			break;
		default: break;
	}
	TestToken( AS );
	// Die Kanalnummer
	SbiExpression* pChan = new SbiExpression( this );
	if( !pChan )
		Error( SbERR_SYNTAX );
	SbiExpression* pLen = NULL;
	if( Peek() == SYMBOL )
	{
		Next();
		String aLen( aSym );
		if( aLen.EqualsIgnoreCaseAscii( "LEN" ) )
		{
			TestToken( EQ );
			pLen = new SbiExpression( this );
		}
	}
	if( !pLen ) pLen = new SbiExpression( this, 128, SbxINTEGER );
	// Der Stack fuer den OPEN-Befehl sieht wie folgt aus:
	// Blocklaenge
	// Kanalnummer
	// Dateiname
	pLen->Gen();
	if( pChan )
		pChan->Gen();
	aFileName.Gen();
	aGen.Gen( _OPEN, nMode, nFlags );
	delete pLen;
	delete pChan;
}

// NAME file AS file

void SbiParser::Name()
{
	// #i92642: Special handling to allow name as symbol
	if( Peek() == EQ )
	{
		aGen.Statement();

		KeywordSymbolInfo aInfo;
		aInfo.m_aKeywordSymbol = String( RTL_CONSTASCII_USTRINGPARAM( "name" ) );
		aInfo.m_eSbxDataType = GetType();
		aInfo.m_eTok = SYMBOL;

		Symbol( &aInfo );
		return;
	}
	SbiExpression aExpr1( this );
	TestToken( AS );
	SbiExpression aExpr2( this );
	aExpr1.Gen();
	aExpr2.Gen();
	aGen.Gen( _RENAME );
}

// CLOSE [n,...]

void SbiParser::Close()
{
	Peek();
	if( IsEoln( eCurTok ) )
		aGen.Gen( _CLOSE, 0 );
	else
	for( ;; )
	{
		SbiExpression aExpr( this );
		while( Peek() == COMMA || Peek() == SEMICOLON )
			Next();
		aExpr.Gen();
		aGen.Gen( _CHANNEL );
		aGen.Gen( _CLOSE, 1 );

		if( IsEoln( Peek() ) )
			break;
	}
}