scope.cpp

#include "lcd_ast.h"
#include <stdio.h>

RootScope* RootScope::instance_ = 0;

RootScope::RootScope()
{
   // init builtin int types
  this->types_ = new std::map<std::string, Type*>();

  // instert for each builtin in type, add size to type if not done alreayd
  this->types_->insert( std::pair<std::string,Type*>("char"
					       , new IntegerType("char", false, sizeof(char))));
  this->types_->insert( std::pair<std::string,Type*>("unsigned char"
					       , new IntegerType("unsigned char", true, sizeof(char))));
  this->types_->insert( std::pair<std::string,Type*>("short"
					      , new IntegerType("short", false, sizeof(short))));
  this->types_->insert( std::pair<std::string,Type*>("unsigned short"
					      , new IntegerType("unsigned short", true, sizeof(short))));
  this->types_->insert( std::pair<std::string,Type*>("int"
					      , new IntegerType("int", false, sizeof(int))));
  this->types_->insert( std::pair<std::string,Type*>("unsigned int"
					      , new IntegerType("unsigned int", true, sizeof(int))));
  this->types_->insert( std::pair<std::string,Type*>("long"
					      , new IntegerType("long", false, sizeof(long))));
  this->types_->insert( std::pair<std::string,Type*>("unsigned long"
					      , new IntegerType("unsigned long", true, sizeof(long))));
  this->types_->insert( std::pair<std::string,Type*>("long long"
					      , new IntegerType("long long", false, sizeof(long long))));
  this->types_->insert( std::pair<std::string,Type*>("unsigned long long"
					      , new IntegerType("unsigned long long", true, sizeof(long long))));
  this->types_->insert( std::pair<std::string,Type*>("capability"
					       , new IntegerType("capability_t", false, sizeof(int))));
}

RootScope* RootScope::instance()
{
  if(!RootScope::instance_)
    RootScope::instance_ = new RootScope();
  return instance_;
}

Type * RootScope::lookup_symbol(const char * sym, int* err)
{
  std::string temp = sym;
  if(this->types_->find(temp) == this->types_->end())
    {
      // printf("looking up %s\n", sym);
      // printf("is empty? %d\n", this->types_->size());
      *err = 0;
      return 0;
    }
  else
    return (*(this->types_))[temp];
}

int RootScope::insert_symbol(const char* sym, Type * value)
{
  std::string temp = sym;
  std::pair<std::map<std::string,Type*>::iterator,bool> ret;
  ret = types_->insert(std::pair<std::string, Type*>(temp, value));
  
  return ret.second;
}

// file scope
Type* FileScope::lookup_symbol(const char* sym, int* err)
{
  std::string temp = sym;
  // lookup here or root first?
  if(types_->find(temp) == types_->end())
    {
      // error
    }
  else
    return (*types_)[temp];
  
}

int FileScope::insert_symbol(const char* sym, Type* value)
{
  std::string temp = sym;
  // redefinition of something at root scope?
  std::pair<std::map<std::string,Type*>::iterator, bool> ret;
  ret = types_->insert(std::pair<std::string,Type*>(temp, value));
  
  return ret.second;
		      
}

FileScope::FileScope(RootScope* root)
{
  this->root_ = root;
  this->types_ = new std::map<std::string, Type*>();
}