/*------------------------------------------------------------\
|                                                             |
| Tool    :                  systemcass                       |
|                                                             |
| File    :                 sc_numrep.h                       |
|                                                             |
| Author  :                 Buchmann Richard                  |
|                                                             |
| Date    :                   04_05_2005                      |
|                                                             |
\------------------------------------------------------------*/
#ifndef __SC_NUMREP_H__
#define __SC_NUMREP_H__

#include <cstdio>
#include <iostream>
#include "sc_string.h"

namespace sc_dt {

typedef enum {
  SC_NOBASE = 0,
  SC_BIN    = 2,     // binary
  SC_OCT    = 8,     // octal, two's complement
  SC_DEC    = 10,    // decimal
  SC_HEX    = 16,    // hexadecimal, two's complement
  SC_BIN_US     ,    // binary, unsigned
  SC_BIN_SM     ,    // binary, sign magnitude
  SC_OCT_US     , 
  SC_OCT_SM     ,
  SC_HEX_US     ,
  SC_HEX_SM     ,
  SC_CSD             // canonical signed digit
} sc_numrep;

inline
const unsigned int bitstring_to_uint (const char * val)
{ 
  unsigned int i, res = 0;
  for (i = 0; val[i] != '\0'; ++i)
  {
    res <<= 1;
    res |= (val[i] == '1')?1:0;
  } 
  return res;    
}

template <typename T>
const sc_string to_string (T val, size_t nbits, sc_numrep n)
{ 
  sc_string s(nbits + 3,'0');
  switch (n) {
  case SC_HEX : {
    char t[64];
    char format[64];
    sprintf (format, "0x0%%0%dx", nbits/4);
    sprintf (t, format, val);
    s = t;
    break;
  }
  case SC_BIN : {
    int i;
    s[1] = 'b';
    for (i = nbits - 1; i >= 0; --i)
    {
      s[i + 3] = (val & 1)?'1':'0';
      val >>= 1;
    } 
    break;
  }
  default:
    { std::cerr << "error\n"; return s; }
  }
#if 0
  std::cerr << "\"" << s << "\"";
#endif
  return s;
}

const std::string to_string (sc_numrep);

} // end of sc_dt namespace

using sc_dt::sc_numrep;
using sc_dt::SC_BIN;
using sc_dt::SC_HEX;
using sc_dt::SC_OCT; 
using sc_dt::SC_DEC;
using sc_dt::SC_HEX;
using sc_dt::SC_BIN_US;
using sc_dt::SC_BIN_SM;
using sc_dt::SC_OCT_US;
using sc_dt::SC_OCT_SM;
using sc_dt::SC_HEX_US;
using sc_dt::SC_HEX_SM;
using sc_dt::SC_CSD;

#endif