/*
   base64.cpp and base64.h

   base64 encoding and decoding with C++.
   More information at
     https://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp

   Version: 2.rc.09 (release candidate)

   Copyright (C) 2004-2017, 2020-2022 Ren Nyffenegger

   This source code is provided 'as-is', without any express or implied
   warranty. In no event will the author be held liable for any damages
   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,
   including commercial applications, and to alter it and redistribute it
   freely, subject to the following restrictions:

   1. The origin of this source code must not be misrepresented; you must not
      claim that you wrote the original source code. If you use this source code
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original source code.

   3. This notice may not be removed or altered from any source distribution.

   Ren Nyffenegger rene.nyffenegger@adp-gmbh.ch

*/

#include "base64.h"

#include 
#include 

 //
 // Depending on the url parameter in base64_chars, one of
 // two sets of base64 characters needs to be chosen.
 // They differ in their last two characters.
 //
static const char* base64_chars[2] = {
             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
             "abcdefghijklmnopqrstuvwxyz"
             "0123456789"
             "+/",

             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
             "abcdefghijklmnopqrstuvwxyz"
             "0123456789"
             "-_"};

static unsigned int pos_of_char(const unsigned char chr) {
 //
 // Return the position of chr within base64_encode()
 //

    if      (chr >= 'A' && chr = 'a' && chr = '0' && chr > 2]);

        if (pos+1 < in_len) {
           ret.push_back(base64_chars_[((bytes_to_encode[pos + 0] & 0x03) > 4)]);

           if (pos+2 < in_len) {
              ret.push_back(base64_chars_[((bytes_to_encode[pos + 1] & 0x0f) > 6)]);
              ret.push_back(base64_chars_[  bytes_to_encode[pos + 2] & 0x3f]);
           }
           else {
              ret.push_back(base64_chars_[(bytes_to_encode[pos + 1] & 0x0f) = 201703L