/*****************************************************************************
 *                                  _   _ ____  _     
 *  Project                     ___| | | |  _ \| |    
 *                             / __| | | | |_) | |    
 *                            | (__| |_| |  _ <| |___ 
 *                             \___|\___/|_| \_\_____|
 *
 *  The contents of this file are subject to the Mozilla Public License
 *  Version 1.0 (the "License"); you may not use this file except in
 *  compliance with the License. You may obtain a copy of the License at
 *  http://www.mozilla.org/MPL/
 *
 *  Software distributed under the License is distributed on an "AS IS"
 *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 *  License for the specific language governing rights and limitations
 *  under the License.
 *
 *  The Original Code is Curl.
 *
 *  The Initial Developer of the Original Code is Daniel Stenberg.
 *
 *  Portions created by the Initial Developer are Copyright (C) 1998.
 *  All Rights Reserved.
 *
 * ------------------------------------------------------------
 * Main author:
 * - Daniel Stenberg <Daniel.Stenberg@sth.frontec.se>
 *
 * 	http://www.fts.frontec.se/~dast/curl/
 *
 * $Source: /cvs/curl/curl/lib/base64.c,v $
 * $Revision: 1.1 $
 * $Date: 1999/03/13 00:56:08 $
 * $Author: dast $
 * $State: Exp $
 * $Locker:  $
 *
 * ------------------------------------------------------------
 ****************************************************************************/

#include <stdio.h>

/* ---- Base64 Encoding --- */
static char table64[]=
  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  
void base64Encode(char *intext, char *output)
{
  unsigned char ibuf[3];
  unsigned char obuf[4];
  int i;
  int inputparts;

  while(*intext) {
    for (i = inputparts = 0; i < 3; i++) { 
      if(*intext) {
        inputparts++;
        ibuf[i] = *intext;
        intext++;
      }
      else
        ibuf[i] = 0;
    }
                       
    obuf [0] = (ibuf [0] & 0xFC) >> 2;
    obuf [1] = ((ibuf [0] & 0x03) << 4) | ((ibuf [1] & 0xF0) >> 4);
    obuf [2] = ((ibuf [1] & 0x0F) << 2) | ((ibuf [2] & 0xC0) >> 6);
    obuf [3] = ibuf [2] & 0x3F;

    switch(inputparts) {
    case 1: /* only one byte read */
      sprintf(output, "%c%c==", 
              table64[obuf[0]],
              table64[obuf[1]]);
      break;
    case 2: /* two bytes read */
      sprintf(output, "%c%c%c=", 
              table64[obuf[0]],
              table64[obuf[1]],
              table64[obuf[2]]);
      break;
    default:
      sprintf(output, "%c%c%c%c", 
              table64[obuf[0]],
              table64[obuf[1]],
              table64[obuf[2]],
              table64[obuf[3]] );
      break;
    }
    output += 4;
  }
  *output=0;
}
/* ---- End of Base64 Encoding ---- */
