Label* SymbolTable::getLabel(const std::wstring& symbol, unsigned int file, unsigned int section)
{
if (isValidSymbolName(symbol) == false)
return NULL;
int actualSection = section;
setFileSectionValues(symbol,file,section);
SymbolKey key = { symbol, file, section };
// find label, create new one if it doesn't exist
auto it = symbols.find(key);
if (it == symbols.end())
{
SymbolInfo value = { LabelSymbol, labels.size() };
symbols[key] = value;
Label* result = new Label(symbol);
if (section == actualSection)
result->setSection(section); // local, set section of parent
else
result->setSection(actualSection+1); // global, set section of children
labels.push_back(result);
return result;
}
// make sure not to match symbols that aren't labels
if (it->second.type != LabelSymbol)
return NULL;
return labels[it->second.index];
}
bool SymbolTable::symbolExists(const std::wstring& symbol, unsigned int file, unsigned int section)
{
if (isValidSymbolName(symbol) == false)
return false;
setFileSectionValues(symbol,file,section);
SymbolKey key = { symbol, file, section };
auto it = symbols.find(key);
return it != symbols.end();
}
bool SymbolTable::findEquation(const std::wstring& name, int file, int section, size_t& dest)
{
setFileSectionValues(name,file,section);
SymbolKey key = { name, file, section };
auto it = symbols.find(key);
if (it == symbols.end() || it->second.type != EquationSymbol)
return false;
dest = it->second.index;
return true;
}
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;
}
