/*
 * printToken.cc
 *   by CMB
 * A useful routine for printing tokens.
 *
 * WARNING: If token values in espresso.tab.h change -- this will no longer 
 * work: Getting valid output depends on the number and the order of
 * the values * defined in espresso.tab.h
 *
 *  MOD 1/12/05 by CMB
 *        Changed to print tokens and linenums in fixed width fields
 *
 * MOD 9/14/04 by CMB
 *   took out TRUE token
 *
 * MOD 9/15/04 by CMB
 *   moved #include <iostream> to header file as part of changes to get
 *   code to compile with g++ version 3
 *
 */

#include "printToken.h"
#include <iomanip>


const int START = 258; // the offset to subtract to get the correct index
                       // in the table


// NUMPRINTVALUES describes the size of tokprintvals below.
//        this depends the value of the last token defined in espresso.tab.h
//   Why +2?  +1 is because of zero-based arrays
//            +1 is to store the EOF at the end
const int NUMPRINTVALUES =  (282 - START) + 2; 


/*
 *  Table of Printvalues for tokens. You can get from a token value
 *  number (defined in espresso.tab.h) to the index of the
 *  corresponding print value by subtracting START (defined above).
 *  E.g., (tokprintvals[IF - START] == "IF") (For single character
 *  tokens, the print value is the character itself.)   
 */
static char * tokprintvals[] = {"BOOLEAN", "CLASS", "ELSE", "IF", "INT",
				"MAIN", "NEW", "NULLTOK", "OUT", "PRINTLN",
				"PUBLIC", "RETURN", "STATIC", "THIS",
				"VOID", "WHILE", "STRING", "SYSTEM", 
				"INT_LITERAL", "BOOL_LITERAL", "ID",
				"EQUALS", "NOTEQUALS", "AND", 
				"ERROR",
				"EOF"
			    };


/*  See .h file for interface comments */

void printToken (ostream &o, int token)
{

  if (token == 0) {      /* special case for bison interface */

    o << left << setw(12) << tokprintvals[NUMPRINTVALUES-1];

  }
  else if (token < START) {  // single char token

    o << left << setw(12) << (char) token;

  } else if (token > START + (NUMPRINTVALUES-2)) {

    o << left << setw(12) << "<INVALID TOKEN>";

  }
  else {

    o << left << setw(12) << tokprintvals[token-START];

  }
}