#include "emit.h"

const int NDIGITS = 10;  // for an array long enough to hold a number string

// for sprintf
#include <cstdio>


string ind(int offset, const string &reg) {
  static char offsetStr[10];

  sprintf(offsetStr, "%d", offset);
  return string(offsetStr) + "(" + reg + ")";
}


string imm(int num) {
  static char numString[NDIGITS];
  sprintf(numString, "%d", num);
  return string(numString);
}


void emit(ostream & o, const string &opcode, 
	  const string &operand)
{
  o << "\t" << opcode << "\t" << operand << endl;
}

void emit(ostream & o, const string &opcode, 
	  const string &op1, 
	  const string &op2)
{
  o << "\t" << opcode << "\t" << op1 << " " << op2 << endl;
}



void emit(ostream & o, const string &opcode, 
	  const string &op1, 
	  const string &op2, 
	  const string &op3)
{
  o << "\t" << opcode << "\t" << op1 << " " << op2 << " " << op3 << endl;
}



void emitLabelDef(ostream & o, const string &label) {
  o << label << ":" << endl;
}


NameGenerator::NameGenerator(const string &prefix) : pre(prefix), next(0)
{ }


string NameGenerator::gen() {

  // update next available number
  next++;

  static char numString[NDIGITS];  // convert number to a string
  sprintf(numString, "%d", next-1);
  return pre + numString;
  
}