void SymbolTable::insertSymbol(const Symbol& symbol) {
if (symbolExists(symbol)) {
throw RedeclarationException(symbol);
} else {
checkAmbiguity(symbol);
}
_table[symbol.scope()].push_back(symbol);
}
void Context::setConstantSymbols()
{
if (_declarations == NULL)
return;
// We first add normal constants, then actors and verbs which are treated as constants also
for (int i = 0; i < _declarations->size(); i++)
if ((*_declarations)[i]->getType() == DECLARATION_CONST)
{
string name = (*_declarations)[i]->getName();
if (symbolExists(name))
Log::write(LOG_ERROR, "Symbol \"%s\" already declared !\n", name.c_str());
_constantSymbols[name] = (*_declarations)[i]->getValue();
}
else if ((*_declarations)[i]->getType() == DECLARATION_ACTOR)
{
string name = (*_declarations)[i]->getName();
if (symbolExists(name))
Log::write(LOG_ERROR, "Symbol \"%s\" already declared !\n", name.c_str());
_constantSymbols[name] = _currentActor++;
if (_currentActor > Game::N_DEFAULT_ACTORS)
Log::write(LOG_ERROR, "Too many actors declared !\n");
}
else if ((*_declarations)[i]->getType() == DECLARATION_VERB)
{
string name = (*_declarations)[i]->getName();
if (symbolExists(name))
Log::write(LOG_ERROR, "Symbol \"%s\" already declared !\n", name.c_str());
_constantSymbols[name] = _currentVerb++;
}
else if ((*_declarations)[i]->getType() == DECLARATION_CLASS)
{
if (_currentClass > MAX_CLASSES)
Log::write(LOG_ERROR, "Too many classes declared !\n");
string name = (*_declarations)[i]->getName();
if (symbolExists(name))
Log::write(LOG_ERROR, "Symbol \"%s\" already declared !\n", name.c_str());
_constantSymbols[name] = _currentClass++;
}
}
void Context::setFunctionSymbols()
{
if (_functions == NULL)
return;
for (int i = 0; i < _functions->size(); i++)
{
string name = (*_functions)[i]->getName();
if (symbolExists(name))
Log::write(LOG_ERROR, "Function \"%s\" already declared !\n", name.c_str());
_functionSymbols[name] = (*_functions)[i]->getID();
}
}
void Context::setVariableSymbols(bool fixedAddresses)
{
// No need to look for variables with fixed addresses when the context type is not global
if (_declarations == NULL || ((_type != CONTEXT_GAME) && fixedAddresses))
return;
for (int i = 0; i < _declarations->size(); i++)
if ((*_declarations)[i]->getType() == DECLARATION_VAR)
{
if ((*_declarations)[i]->hasFixedAddress() != fixedAddresses)
{
if (_type != CONTEXT_GAME)
Log::write(LOG_ERROR, "Cannot specify the address of local variable !\n");
continue;
}
string name = (*_declarations)[i]->getName();
uint32_t address;
// Check if symbol doesn't exist already
if (symbolExists(name))
Log::write(LOG_ERROR, "Symbol \"%s\" already declared !\n", name.c_str());
// Check if address is not already taken in case it's a fixed address
map<string, uint32_t>::const_iterator iterator = _variableSymbols.begin();
if (fixedAddresses)
{
address = (*_declarations)[i]->getValue();
if (isAddressUsed(address))
Log::write(LOG_ERROR, "Symbol \"%s\" can't be mapped as this address is already used !\n", name.c_str());
}
// Search through the map to get the smallest available address
else
{
address = (_type == CONTEXT_GAME) ? 0 : LOCAL_VARIABLE_MASK;
while (isAddressUsed(address))
address++;
}
// Check wether the address fits in the autorized range
// (and make sure we reserve the last local variable for temporary arrays)
if ((_type == CONTEXT_GAME && address >= Game::MAX_WORD_VARIABLES)
|| (_type != CONTEXT_GAME && (address < LOCAL_VARIABLE_MASK || address >= ((Game::MAX_LOCAL_VARIABLES - 1) | LOCAL_VARIABLE_MASK))))
Log::write(LOG_ERROR, "Symbol \"%s\" can't be mapped as this address is invalid !\n", name.c_str());
_variableSymbols[name] = address;
}
}
bool SymbolTable::addEquation(const std::wstring& name, int file, int section, size_t referenceIndex)
{
if (isValidSymbolName(name) == false)
return false;
if (symbolExists(name,file,section))
return false;
setFileSectionValues(name,file,section);
SymbolKey key = { name, file, section };
SymbolInfo value = { EquationSymbol, referenceIndex };
symbols[key] = value;
equationsCount++;
return true;
}
bool SymbolTable::addEquation(const std::wstring& name, unsigned int file, unsigned int section, std::wstring& replacement)
{
if (isValidSymbolName(name) == false)
return false;
if (symbolExists(name,file,section))
return false;
setFileSectionValues(name,file,section);
SymbolKey key = { name, file, section };
SymbolInfo value = { EquationSymbol, equations.size() };
symbols[key] = value;
Equation equation = { name, replacement, file, section };
equations.push_back(equation);
return true;
}
