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