CBotInstr* CBotFor::Compile(CBotToken* &p, CBotCStack* pStack)
{
CBotFor* inst = new CBotFor(); // creates the object
CBotToken* pp = p; // preserves at the ^ token (starting position)
if ( IsOfType( p, TokenTypVar ) &&
IsOfType( p, ID_DOTS ) )
{
inst->m_label = pp->GetString(); // register the name of label
}
inst->SetToken(p);
if (!IsOfType(p, ID_FOR)) return nullptr; // should never happen
if ( !IsOfType(p, ID_OPENPAR)) // missing parenthesis ?
{
pStack->SetError(TX_OPENPAR, p->GetStart());
return nullptr;
}
CBotCStack* pStk = pStack->TokenStack(pp, true); // un petit bout de pile svp
// compiles instructions for initialization
inst->m_Init = CBotListExpression::Compile( p, pStk );
if ( pStk->IsOk() )
{
if ( !IsOfType(p, ID_SEP)) // lack the semicolon?
{
pStack->SetError(TX_OPENPAR, p->GetStart());
delete inst;
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}
inst->m_Test = CBotBoolExpr::Compile( p, pStk );
if ( pStk->IsOk() )
{
if ( !IsOfType(p, ID_SEP)) // lack the semicolon?
{
pStack->SetError(TX_OPENPAR, p->GetStart());
delete inst;
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}
inst->m_Incr = CBotListExpression::Compile( p, pStk );
if ( pStk->IsOk() )
{
if ( IsOfType(p, ID_CLOSEPAR)) // missing parenthesis ?
{
IncLvl(inst->m_label);
inst->m_Block = CBotBlock::CompileBlkOrInst( p, pStk, true );
DecLvl();
if ( pStk->IsOk() )
return pStack->Return(inst, pStk);;
}
pStack->SetError(TX_CLOSEPAR, p->GetStart());
}
}
}
delete inst; // error, frees up
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}
CBotInstr* CBotDo::Compile(CBotToken* &p, CBotCStack* pStack)
{
CBotDo* inst = new CBotDo(); // creates the object
CBotToken* pp = p; // preserves at the ^ token (starting position)
if ( IsOfType( p, TokenTypVar ) &&
IsOfType( p, ID_DOTS ) )
{
inst->m_label = pp->GetString(); // register the name of label
}
inst->SetToken(p);
if (!IsOfType(p, ID_DO)) return nullptr; // should never happen
CBotCStack* pStk = pStack->TokenStack(pp); // un petit bout de pile svp
// looking for a statement block after the do
IncLvl(inst->m_label);
inst->m_Block = CBotBlock::CompileBlkOrInst( p, pStk, true );
DecLvl();
if ( pStk->IsOk() )
{
if (IsOfType(p, ID_WHILE))
{
if ( nullptr != (inst->m_Condition = CBotCondition::Compile( p, pStk )) )
{
// the condition exists
if (IsOfType(p, ID_SEP))
{
return pStack->Return(inst, pStk); // return an object to the application
}
pStk->SetError(TX_ENDOF, p->GetStart());
}
}
pStk->SetError(TX_WHILE, p->GetStart());
}
delete inst; // error, frees up
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}
CBotInstr* CBotWhile::Compile(CBotToken* &p, CBotCStack* pStack)
{
CBotWhile* inst = new CBotWhile(); // creates the object
CBotToken* pp = p; // preserves at the ^ token (starting position)
if ( IsOfType( p, TokenTypVar ) &&
IsOfType( p, ID_DOTS ) )
{
inst->m_label = pp->GetString(); // records the name of the label
}
inst->SetToken(p);
if (!IsOfType(p, ID_WHILE)) return nullptr; // should never happen
CBotCStack* pStk = pStack->TokenStack(pp); // un petit bout de pile svp
// a bit of battery please (??)
if ( nullptr != (inst->m_condition = CBotCondition::Compile(p, pStk )) )
{
// the condition exists
IncLvl(inst->m_label);
inst->m_block = CBotBlock::CompileBlkOrInst(p, pStk, true );
DecLvl();
if ( pStk->IsOk() )
{
// the statement block is ok (it may be empty!
return pStack->Return(inst, pStk); // return an object to the application
// makes the object to which the application
}
}
delete inst; // error, frees the place
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}
CBotInstr* CBotSwitch::Compile(CBotToken* &p, CBotCStack* pStack)
{
CBotSwitch* inst = new CBotSwitch(); // creates the object
CBotToken* pp = p; // preserves at the ^ token (starting position)
inst->SetToken(p);
if (!IsOfType(p, ID_SWITCH)) return nullptr; // should never happen
CBotCStack* pStk = pStack->TokenStack(pp); // un petit bout de pile svp
if ( IsOfType(p, ID_OPENPAR ) )
{
if ( nullptr != (inst->m_Value = CBotExpression::Compile( p, pStk )) )
{
if ( pStk->GetType() < CBotTypLong )
{
if ( IsOfType(p, ID_CLOSEPAR ) )
{
if ( IsOfType(p, ID_OPBLK ) )
{
IncLvl();
while( !IsOfType( p, ID_CLBLK ) )
{
if ( p->GetType() == ID_CASE || p->GetType() == ID_DEFAULT)
{
CBotCStack* pStk2 = pStk->TokenStack(p); // un petit bout de pile svp
CBotInstr* i = CBotCase::Compile( p, pStk2 );
if (i == nullptr)
{
delete inst;
return pStack->Return(nullptr, pStk2);
}
delete pStk2;
if ( inst->m_Block == nullptr ) inst->m_Block = i;
else inst->m_Block->AddNext(i);
continue;
}
if ( inst->m_Block == nullptr )
{
pStk->SetError(TX_NOCASE, p->GetStart());
delete inst;
return pStack->Return(nullptr, pStk);
}
CBotInstr* i = CBotBlock::CompileBlkOrInst( p, pStk, true );
if ( !pStk->IsOk() )
{
delete inst;
return pStack->Return(nullptr, pStk);
}
inst->m_Block->AddNext(i);
if ( p == nullptr )
{
pStk->SetError(TX_CLOSEBLK, -1);
delete inst;
return pStack->Return(nullptr, pStk);
}
}
DecLvl();
if ( inst->m_Block == nullptr )
{
pStk->SetError(TX_NOCASE, p->GetStart());
delete inst;
return pStack->Return(nullptr, pStk);
}
// the statement block is ok
return pStack->Return(inst, pStk); // return an object to the application
}
pStk->SetError( TX_OPENBLK, p->GetStart() );
}
pStk->SetError( TX_CLOSEPAR, p->GetStart() );
}
pStk->SetError( TX_BADTYPE, p->GetStart() );
}
}
pStk->SetError( TX_OPENPAR, p->GetStart());
delete inst; // error, frees up
return pStack->Return(nullptr, pStk); // no object, the error is on the stack
}