/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#include <basic/sberrors.hxx>
#include <parser.hxx>
#include <iosys.hxx>
#include <memory>
// test if there's an I/O channel
bool SbiParser::Channel(
bool bAlways )
{
bool bRes =
false;
Peek();
if( IsHash() )
{
SbiExpression aExpr(
this );
while( Peek() == COMMA || Peek() == SEMICOLON )
Next();
aExpr.Gen();
aGen.Gen( SbiOpcode::CHANNEL_ );
bRes =
true;
}
else if( bAlways )
Error( ERRCODE_BASIC_EXPECTED, u
"#"_ustr );
return bRes;
}
// it's tried that at object variables the Default-
// Property is addressed for PRINT and WRITE
void SbiParser::Print()
{
bool bChan = Channel();
while( !bAbort )
{
if( !IsEoln( Peek() ) )
{
SbiExpression(
this).Gen();
Peek();
aGen.Gen( eCurTok == COMMA ? SbiOpcode::PRINTF_ : SbiOpcode::BPRINT_ );
}
if( eCurTok == COMMA || eCurTok == SEMICOLON )
{
Next();
if( IsEoln( Peek() ) )
break;
}
else
{
aGen.Gen( SbiOpcode::PRCHAR_,
'\n' );
break;
}
}
if( bChan )
aGen.Gen( SbiOpcode::CHAN0_ );
}
// WRITE #chan, expr, ...
void SbiParser::Write()
{
bool bChan = Channel();
while( !bAbort )
{
SbiExpression(
this).Gen();
aGen.Gen( SbiOpcode::BWRITE_ );
if( Peek() == COMMA )
{
aGen.Gen( SbiOpcode::PRCHAR_,
',' );
Next();
if( IsEoln( Peek() ) )
break;
}
else
{
aGen.Gen( SbiOpcode::PRCHAR_,
'\n' );
break;
}
}
if( bChan )
aGen.Gen( SbiOpcode::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 =
"line";
aInfo.m_eSbxDataType = GetType();
Symbol( &aInfo );
}
}
// LINE INPUT [prompt], var$
void SbiParser::LineInput()
{
Channel(
true );
{
SbiExpression aExpr(
this, SbOPERAND);
if (!aExpr.IsVariable())
Error(ERRCODE_BASIC_VAR_EXPECTED);
if (aExpr.GetType() != SbxVARIANT && aExpr.GetType() != SbxSTRING)
Error(ERRCODE_BASIC_CONVERSION);
aExpr.Gen();
aGen.Gen(SbiOpcode::LINPUT_);
}
aGen.Gen( SbiOpcode::CHAN0_ );
// ResetChannel() not in StepLINPUT() anymore
}
// INPUT
void SbiParser::Input()
{
aGen.Gen( SbiOpcode::RESTART_ );
Channel(
true );
while( !bAbort )
{
SbiExpression aExpr(
this, SbOPERAND);
if (!aExpr.IsVariable())
Error( ERRCODE_BASIC_VAR_EXPECTED );
aExpr.Gen();
aGen.Gen( SbiOpcode::INPUT_ );
if (Peek() != COMMA)
break;
Next();
}
aGen.Gen( SbiOpcode::CHAN0_ );
}
// OPEN stringexpr FOR mode ACCESS access mode AS Channel [Len=n]
void SbiParser::Open()
{
bInStatement =
true;
SbiExpression aFileName(
this );
SbiToken eTok;
TestToken(
FOR );
StreamMode nMode = StreamMode::NONE;
SbiStreamFlags nFlags = SbiStreamFlags::NONE;
switch( Next() )
{
case INPUT:
nMode = StreamMode::READ; nFlags |= SbiStreamFlags::Input;
break;
case OUTPUT:
nMode = StreamMode::WRITE | StreamMode::TRUNC; nFlags |= SbiStreamFlags::Output;
break;
case APPEND:
nMode = StreamMode::WRITE; nFlags |= SbiStreamFlags::Append;
break;
case RANDOM:
nMode = StreamMode::READ | StreamMode::WRITE; nFlags |= SbiStreamFlags::Random;
break;
case BINARY:
nMode = StreamMode::READ | StreamMode::WRITE; nFlags |= SbiStreamFlags::Binary;
break;
default:
Error( ERRCODE_BASIC_SYNTAX );
}
if( Peek() == ACCESS )
{
Next();
eTok = Next();
// influence only READ,WRITE-Flags in nMode
nMode &= ~StreamMode(StreamMode::READ | StreamMode::WRITE);
// delete
if( eTok == READ )
{
if( Peek() == WRITE )
{
Next();
nMode |= StreamMode::READ | StreamMode::WRITE;
}
else
nMode |= StreamMode::READ;
}
else if( eTok == WRITE )
nMode |= StreamMode::WRITE;
else
Error( ERRCODE_BASIC_SYNTAX );
}
switch( Peek() )
{
case SHARED:
Next(); nMode |= StreamMode::SHARE_DENYNONE;
break;
case LOCK:
Next();
eTok = Next();
if( eTok == READ )
{
if( Peek() == WRITE )
{
Next();
nMode |= StreamMode::SHARE_DENYALL;
}
else nMode |= StreamMode::SHARE_DENYREAD;
}
else if( eTok == WRITE )
nMode |= StreamMode::SHARE_DENYWRITE;
else
Error( ERRCODE_BASIC_SYNTAX );
break;
default:
break;
}
TestToken( AS );
// channel number
SbiExpression aChan(
this );
std::unique_ptr<SbiExpression> pLen;
if( Peek() == SYMBOL )
{
Next();
if( aSym.equalsIgnoreAsciiCase(
"LEN") )
{
TestToken( EQ );
pLen.reset(
new SbiExpression(
this ));
}
}
if( !pLen ) pLen.reset(
new SbiExpression(
this, 128, SbxINTEGER ));
// the stack for the OPEN command looks as follows:
// block length
// channel number
// file name
pLen->Gen();
aChan.Gen();
aFileName.Gen();
aGen.Gen( SbiOpcode::OPEN_,
static_cast<sal_uInt32>(nMode),
static_cast<sal_uInt32>(nFl
ags) );
bInStatement = false;
}
// 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 = "name";
aInfo.m_eSbxDataType = GetType();
Symbol( &aInfo );
return;
}
SbiExpression aExpr1( this );
TestToken( AS );
SbiExpression aExpr2( this );
aExpr1.Gen();
aExpr2.Gen();
aGen.Gen( SbiOpcode::RENAME_ );
}
// CLOSE [n,...]
void SbiParser::Close()
{
Peek();
if( IsEoln( eCurTok ) )
aGen.Gen( SbiOpcode::CLOSE_, 0 );
else
for( ;; )
{
SbiExpression aExpr( this );
while( Peek() == COMMA || Peek() == SEMICOLON )
Next();
aExpr.Gen();
aGen.Gen( SbiOpcode::CHANNEL_ );
aGen.Gen( SbiOpcode::CLOSE_, 1 );
if( IsEoln( Peek() ) )
break;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */