void DataStatement::validate()
{
unsigned int baseSize = dataType == WORD ? 2 : 1;
unsigned int size = 0;
ListNode<DataItem*>::ListType& list = items->getList();
for(size_t i = 0; i < list.size(); i++)
{
DataItem* item = list[i];
item->check();
switch(item->getItemType())
{
case DataItem::STRING_LITERAL:
size += baseSize * item->getStringLiteral()->getValue().length();
break;
case DataItem::EXPRESSION:
size += baseSize;
break;
}
}
// Reserve the bytes needed for this data.
// (Previous errors shouldn't wreck the size calculation).
RomBank* bank = romGenerator->getActiveBank();
if(!bank)
{
error("data statement found, but a rom bank hasn't been selected yet", getSourcePosition(), true);
}
else
{
bank->expand(size, getSourcePosition());
}
}
void DataStatement::generate()
{
// Get the bank to use for writing.
RomBank* bank = romGenerator->getActiveBank();
if(!bank)
{
error("data statement found, but a rom bank hasn't been selected yet", getSourcePosition(), true);
return;
}
ListNode<DataItem*>::ListType list = items->getList();
for(size_t i = 0; i < list.size(); i++)
{
DataItem* item = list[i];
switch(item->getItemType())
{
case DataItem::STRING_LITERAL:
{
const std::string& str = item->getStringLiteral()->getValue();
const char* data = str.data();
if(dataType == WORD)
{
for(size_t j = 0; j < str.length(); j++)
{
bank->writeWord(data[i], getSourcePosition());
}
}
else
{
for(size_t j = 0; j < str.length(); j++)
{
bank->writeByte(data[i], getSourcePosition());
}
}
break;
}
case DataItem::EXPRESSION:
if(item->getExpression()->fold(true, true))
{
if(dataType == WORD)
{
bank->writeWord(item->getExpression()->getFoldedValue(), getSourcePosition());
}
else
{
bank->writeByte(item->getExpression()->getFoldedValue(), getSourcePosition());
}
}
else
{
error("data item has indeterminate value", getSourcePosition());
}
break;
}
}
}