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base64.cpp
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base64.cpp
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/*
* This file is part of the Code::Blocks IDE and licensed under the GNU Lesser General Public License, version 3
* http://www.gnu.org/licenses/lgpl-3.0.html
*
* $Revision: 4909 $
* $Id: base64.cpp 4909 2008-02-27 13:15:26Z mortenmacfly $
* $HeadURL: svn://svn.berlios.de/codeblocks/tags/8.02/src/sdk/base64.cpp $
*/
//*********************************************************************
//* Base64 - a simple base64 encoder and decoder.
//*
//* Copyright (c) 1999, Bob Withers - bwit@pobox.com
//*
//* This code may be freely used for any purpose, either personal
//* or commercial, provided the authors copyright notice remains
//* intact.
//*********************************************************************
//
// converted to wxWindows by Frank Bu?
//
#include "base64.h"
#include "defines.h"
#ifdef HAVE_WX29
#include "utils/conversion.h"
#endif
const wxChar fillchar = '=';
// 00000000001111111111222222
// 01234567890123456789012345
static wxString cvt = _T("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
// 22223333333333444444444455
// 67890123456789012345678901
"abcdefghijklmnopqrstuvwxyz"
// 555555556666
// 234567890123
"0123456789+/");
wxString wxBase64::Encode(const wxString& data)
{
return wxBase64::Encode((const wxUint8*)data.c_str(), data.Len());
}
wxString wxBase64::Encode(const wxUint8* pData, size_t len)
{
size_t c;
wxString ret;
ret.Alloc(len * 4 / 3 + len * 2);
for (size_t i = 0; i < len; ++i)
{
c = (pData[i] >> 2) & 0x3f;
ret.Append(cvt[c], 1);
c = (pData[i] << 4) & 0x3f;
if (++i < len)
c |= (pData[i] >> 4) & 0x0f;
ret.Append(cvt[c], 1);
if (i < len)
{
c = (pData[i] << 2) & 0x3f;
if (++i < len)
c |= (pData[i] >> 6) & 0x03;
ret.Append(cvt[c], 1);
}
else
{
++i;
ret.Append(fillchar, 1);
}
if (i < len)
{
c = pData[i] & 0x3f;
ret.Append(cvt[c], 1);
}
else
{
ret.Append(fillchar, 1);
}
}
return ret;
}
std::string wxBase64::Decode(const wxString& data)
{
int c;
int c1;
size_t len = data.Len();
std::string ret;
ret.reserve(data.length() * 3 / 4);
for (size_t i = 0; i < len; ++i)
{
// TODO: check all Find results for -1 as result of wrong input data for release build
c = cvt.find(data[i]);
wxASSERT_MSG(c >= 0, _T("invalid base64 input"));
++i;
c1 = cvt.find(data[i]);
wxASSERT_MSG(c1 >= 0, _T("invalid base64 input"));
c = (c << 2) | ((c1 >> 4) & 0x3);
ret.push_back(c);
if (++i < len)
{
c = data[i];
if ((char)fillchar == c)
break;
#ifndef HAVE_WX29
c = cvt.find(c);
#else
c = cvt.find( TowxString(c) );
#endif
wxASSERT_MSG(c >= 0, _T("invalid base64 input"));
c1 = ((c1 << 4) & 0xf0) | ((c >> 2) & 0xf);
ret.push_back(c1);
}
if (++i < len)
{
c1 = data[i];
if ((char)fillchar == c1)
break;
#ifndef HAVE_WX29
c1 = cvt.find(c1);
#else
c1 = cvt.find( TowxString(c1) );
#endif
wxASSERT_MSG(c1 >= 0, _T("invalid base64 input"));
c = ((c << 6) & 0xc0) | c1;
ret.push_back(c);
}
}
return ret;
}