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#include <list>
#include <string>
#include "symbol.hpp"
namespace SpasmImpl
{
namespace ASM
{
const size_t Symbol::notdefined = 0xff;
// const size_t Symbol::notdefined = ~0ull;
Symbol::Symbol() : _definition(notdefined) {}
Symbol::Symbol(const std::string& identifier, size_t definition)
: _identifier(identifier), _definition(definition)
{
}
const std::string& Symbol::identifier() const
{
return _identifier;
}
size_t Symbol::definition() const
{
return _definition;
}
void Symbol::define(size_t definition)
{
_definition = definition;
}
size_t Symbol::add_position(size_t position)
{
_positions.push_back(position);
return _definition;
}
Symbol::Positions_t::const_iterator Symbol::positions_begin() const
{
return _positions.begin();
}
Symbol::Positions_t::const_iterator Symbol::positions_end() const
{
return _positions.end();
}
Symbol_Table::Symbol_Table() {}
/*!
** Search the table for symbol by identifier
**
** \param identifier - identifier of the symbol
**
** \return pointer to the symbol if it exists or NULL otherwise.
*/
Symbol* Symbol_Table::find(const std::string& identifier) const
{
const_iterator i = _table.find(identifier);
return (i != _table.end()) ? i->second : NULL;
}
/*!
** Insert symbol with identifier indentifier on position position
** of just add new position for symbol.
** \param identifier - identifer of the symbol
** \param position - position of the symbol
**
** \return pointer to the symbol
*/
Symbol* Symbol_Table::insert(const std::string& identifier, size_t position)
{
Symbol* psymbol = find(identifier);
if (psymbol == NULL)
{
psymbol = new Symbol(identifier);
_table.insert(std::make_pair(identifier, psymbol));
}
psymbol->add_position(position);
return psymbol;
}
/*!
** define symbol with identifier indentifier
** If the symbol already exists its definition is changed
** \param identifier - identifer of the symbol
** \param definition - definition of the symbol
**
** \return pointer to the symbol
*/
Symbol* Symbol_Table::define(const std::string& identifier, size_t definition)
{
Symbol* psymbol = find(identifier);
if (psymbol == NULL)
{
psymbol = new Symbol(identifier, definition);
_table.insert(std::make_pair(identifier, psymbol));
}
else
psymbol->define(definition);
return psymbol;
}
Symbol_Table::const_iterator Symbol_Table::begin() const
{
return _table.begin();
}
Symbol_Table::const_iterator Symbol_Table::end() const
{
return _table.end();
}
} // namespace ASM
} // namespace SpasmImpl
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