1*cdf0e10cSrcweir /************************************************************************* 2*cdf0e10cSrcweir * 3*cdf0e10cSrcweir * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4*cdf0e10cSrcweir * 5*cdf0e10cSrcweir * Copyright 2000, 2010 Oracle and/or its affiliates. 6*cdf0e10cSrcweir * 7*cdf0e10cSrcweir * OpenOffice.org - a multi-platform office productivity suite 8*cdf0e10cSrcweir * 9*cdf0e10cSrcweir * This file is part of OpenOffice.org. 10*cdf0e10cSrcweir * 11*cdf0e10cSrcweir * OpenOffice.org is free software: you can redistribute it and/or modify 12*cdf0e10cSrcweir * it under the terms of the GNU Lesser General Public License version 3 13*cdf0e10cSrcweir * only, as published by the Free Software Foundation. 14*cdf0e10cSrcweir * 15*cdf0e10cSrcweir * OpenOffice.org is distributed in the hope that it will be useful, 16*cdf0e10cSrcweir * but WITHOUT ANY WARRANTY; without even the implied warranty of 17*cdf0e10cSrcweir * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18*cdf0e10cSrcweir * GNU Lesser General Public License version 3 for more details 19*cdf0e10cSrcweir * (a copy is included in the LICENSE file that accompanied this code). 20*cdf0e10cSrcweir * 21*cdf0e10cSrcweir * You should have received a copy of the GNU Lesser General Public License 22*cdf0e10cSrcweir * version 3 along with OpenOffice.org. If not, see 23*cdf0e10cSrcweir * <http://www.openoffice.org/license.html> 24*cdf0e10cSrcweir * for a copy of the LGPLv3 License. 25*cdf0e10cSrcweir * 26*cdf0e10cSrcweir ************************************************************************/ 27*cdf0e10cSrcweir 28*cdf0e10cSrcweir #include <stdio.h> 29*cdf0e10cSrcweir #include <string.h> 30*cdf0e10cSrcweir #include "base64.h" 31*cdf0e10cSrcweir 32*cdf0e10cSrcweir static const char base64_tab[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 33*cdf0e10cSrcweir 34*cdf0e10cSrcweir extern "C" size_t base64_encode( FILE *fin, FILE *fout ) 35*cdf0e10cSrcweir { 36*cdf0e10cSrcweir size_t nBytesRead = 0; 37*cdf0e10cSrcweir size_t nLineLength = 0; 38*cdf0e10cSrcweir size_t nBytesWritten = 0; 39*cdf0e10cSrcweir 40*cdf0e10cSrcweir size_t nBytes = 0; 41*cdf0e10cSrcweir 42*cdf0e10cSrcweir do 43*cdf0e10cSrcweir { 44*cdf0e10cSrcweir unsigned char in_buffer[3]; 45*cdf0e10cSrcweir 46*cdf0e10cSrcweir memset( in_buffer, 0, sizeof(in_buffer) ); 47*cdf0e10cSrcweir nBytes = fread( in_buffer, 1, sizeof(in_buffer), fin ); 48*cdf0e10cSrcweir nBytesRead += nBytes; 49*cdf0e10cSrcweir 50*cdf0e10cSrcweir if ( nBytes ) 51*cdf0e10cSrcweir { 52*cdf0e10cSrcweir unsigned long value = 53*cdf0e10cSrcweir ((unsigned long)in_buffer[0]) << 16 | 54*cdf0e10cSrcweir ((unsigned long)in_buffer[1]) << 8 | 55*cdf0e10cSrcweir ((unsigned long)in_buffer[2]) << 0; 56*cdf0e10cSrcweir 57*cdf0e10cSrcweir unsigned char out_buffer[4]; 58*cdf0e10cSrcweir 59*cdf0e10cSrcweir memset( out_buffer, '=', sizeof(out_buffer) ); 60*cdf0e10cSrcweir 61*cdf0e10cSrcweir out_buffer[0] = base64_tab[(value >> 18) & 0x3F]; 62*cdf0e10cSrcweir out_buffer[1] = base64_tab[(value >> 12) & 0x3F]; 63*cdf0e10cSrcweir 64*cdf0e10cSrcweir if ( nBytes > 1 ) 65*cdf0e10cSrcweir { 66*cdf0e10cSrcweir out_buffer[2] = base64_tab[(value >> 6) & 0x3F]; 67*cdf0e10cSrcweir if ( nBytes > 2 ) 68*cdf0e10cSrcweir out_buffer[3] = base64_tab[(value >> 0) & 0x3F]; 69*cdf0e10cSrcweir } 70*cdf0e10cSrcweir 71*cdf0e10cSrcweir if ( nLineLength >= 76 ) 72*cdf0e10cSrcweir { 73*cdf0e10cSrcweir fputs( "\n", fout ); 74*cdf0e10cSrcweir nLineLength = 0; 75*cdf0e10cSrcweir } 76*cdf0e10cSrcweir 77*cdf0e10cSrcweir nBytesWritten += fwrite( out_buffer, 1, sizeof(out_buffer), fout ); 78*cdf0e10cSrcweir nLineLength += sizeof(out_buffer); 79*cdf0e10cSrcweir } 80*cdf0e10cSrcweir } while ( nBytes ); 81*cdf0e10cSrcweir 82*cdf0e10cSrcweir return nBytesWritten; 83*cdf0e10cSrcweir } 84