86 lines
2.7 KiB
C++
Executable file
86 lines
2.7 KiB
C++
Executable file
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: base64.cpp,v $
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* $Revision: 1.4 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include "base64.h"
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static const char base64_tab[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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extern "C" size_t base64_encode( FILE *fin, FILE *fout )
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{
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size_t nBytesRead = 0;
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size_t nLineLength = 0;
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size_t nBytesWritten = 0;
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size_t nBytes = 0;
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do
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{
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unsigned char in_buffer[3];
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memset( in_buffer, 0, sizeof(in_buffer) );
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nBytes = fread( in_buffer, 1, sizeof(in_buffer), fin );
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nBytesRead += nBytes;
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if ( nBytes )
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{
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unsigned long value =
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((unsigned long)in_buffer[0]) << 16 |
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((unsigned long)in_buffer[1]) << 8 |
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((unsigned long)in_buffer[2]) << 0;
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unsigned char out_buffer[4];
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memset( out_buffer, '=', sizeof(out_buffer) );
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out_buffer[0] = base64_tab[(value >> 18) & 0x3F];
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out_buffer[1] = base64_tab[(value >> 12) & 0x3F];
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if ( nBytes > 1 )
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{
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out_buffer[2] = base64_tab[(value >> 6) & 0x3F];
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if ( nBytes > 2 )
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out_buffer[3] = base64_tab[(value >> 0) & 0x3F];
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}
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if ( nLineLength >= 76 )
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{
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fputs( "\n", fout );
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nLineLength = 0;
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}
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nBytesWritten += fwrite( out_buffer, 1, sizeof(out_buffer), fout );
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nLineLength += sizeof(out_buffer);
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}
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} while ( nBytes );
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return nBytesWritten;
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}
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