/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS system libraries
 * FILE:        lib/crtdll/stdlib/itoa.c
 * PURPOSE:     converts a integer to ascii
 * PROGRAMER:   
 * UPDATE HISTORY:
 *              1995: Created
 *              1998: Added ltoa Boudewijn Dekker
 */
/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */

#include <msvcrt/errno.h>
#include <msvcrt/stdlib.h>
#include <msvcrt/internal/file.h>


char* _itoa(int value, char* string, int radix)
{
  char tmp[33];
  char *tp = tmp;
  int i;
  unsigned v;
  int sign;
  char *sp;

  if (radix > 36 || radix <= 1)
  {
    __set_errno(EDOM);
    return 0;
  }

  sign = (radix == 10 && value < 0);
  if (sign)
    v = -value;
  else
    v = (unsigned)value;
  while (v || tp == tmp)
  {
    i = v % radix;
    v = v / radix;
    if (i < 10)
      *tp++ = i+'0';
    else
      *tp++ = i + 'a' - 10;
  }

  if (string == 0)
    string = (char *)malloc((tp-tmp)+sign+1);
  sp = string;

  if (sign)
    *sp++ = '-';
  while (tp > tmp)
    *sp++ = *--tp;
  *sp = 0;
  return string;
}

char* _ltoa(long value, char* string, int radix)
{
  char tmp[33];
  char *tp = tmp;
  long i;
  unsigned long v;
  int sign;
  char *sp;

  if (radix > 36 || radix <= 1)
  {
     __set_errno(EDOM);
    return 0;
  }

  sign = (radix == 10 && value < 0);
  if (sign)
    v = -value;
  else
    v = (unsigned long)value;
  while (v || tp == tmp)
  {
    i = v % radix;
    v = v / radix;
    if (i < 10)
      *tp++ = i+'0';
    else
      *tp++ = i + 'a' - 10;
  }

  if (string == 0)
    string = (char *)malloc((tp-tmp)+sign+1);
  sp = string;

  if (sign)
    *sp++ = '-';
  while (tp > tmp)
    *sp++ = *--tp;
  *sp = 0;
  return string;
}

char* _ultoa(unsigned long value, char* string, int radix)
{
  char tmp[33];
  char *tp = tmp;
  long i;
  unsigned long v = value;
  char *sp;

  if (radix > 36 || radix <= 1)
  {
    __set_errno(EDOM);
    return 0;
  }

  while (v || tp == tmp)
  {
    i = v % radix;
    v = v / radix;
    if (i < 10)
      *tp++ = i+'0';
    else
      *tp++ = i + 'a' - 10;
  }

  if (string == 0)
    string = (char *)malloc((tp-tmp)+1);
  sp = string;

  while (tp > tmp)
    *sp++ = *--tp;
  *sp = 0;
  return string;
}