#include "assembler.h"

using namespace std::string_literals;

Asm::Args::Immediate32::Immediate32(const Asm::Args::Immediate64& imm64)
{
 if (imm64.value() < 0x100000000)
  m_value = static_cast<uint32_t>(imm64.value());
 else
  throw std::runtime_error("Immediate32: Constructed from too big Immediate64");
}

namespace {

std::unordered_map<std::string, FactoryFunction> ops;

}

bool registerOp(const std::string& mnemonic, FactoryFunction f)
{
 if (ops.contains(mnemonic)) {
  std::cerr << "Warning: mnemonic |" << mnemonic << "| already registered." << std::endl;
  return false;
 }

 //std::cout << "Registering mnemonic |" << mnemonic << "|." << std::endl;

 ops[mnemonic] = f;

 return true;
}

std::string mangleName(const std::string& s, const Asm::Args& args)
{
 std::string result {s};

 for (const auto& arg: args) {
  result += "_"s + arg.type().name();
 }

 return result;
}

std::shared_ptr<Op> makeOp(const std::string& mnemonic, const Asm::Args& args)
{
 std::string mangled{mangleName(mnemonic, args)};

 const auto& i{ops.find(mangled)};
 if (i == ops.end())
  throw std::runtime_error("Instruction "s + mangled + " not implemented.");

 return i->second(args);
}

std::shared_ptr<Op> makeOp(const std::string& mnemonic)
{
 Asm::Args dummy; // empty list of arguments
 return makeOp(mnemonic, dummy);
}

std::shared_ptr<Label> makeLabel(const std::string& name)
{
 return std::make_shared<Label>(name);
}

std::shared_ptr<Data> makeData(const std::vector<uint8_t>& data)
{
 return std::make_shared<Data>(data);
}