| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "base64.h" |
| |
| static const char base64_tab[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| |
| extern "C" size_t base64_encode( FILE *fin, FILE *fout ) |
| { |
| size_t nBytesRead = 0; |
| size_t nLineLength = 0; |
| size_t nBytesWritten = 0; |
| |
| size_t nBytes = 0; |
| |
| do |
| { |
| unsigned char in_buffer[3]; |
| |
| memset( in_buffer, 0, sizeof(in_buffer) ); |
| nBytes = fread( in_buffer, 1, sizeof(in_buffer), fin ); |
| nBytesRead += nBytes; |
| |
| if ( nBytes ) |
| { |
| unsigned long value = |
| ((unsigned long)in_buffer[0]) << 16 | |
| ((unsigned long)in_buffer[1]) << 8 | |
| ((unsigned long)in_buffer[2]) << 0; |
| |
| unsigned char out_buffer[4]; |
| |
| memset( out_buffer, '=', sizeof(out_buffer) ); |
| |
| out_buffer[0] = base64_tab[(value >> 18) & 0x3F]; |
| out_buffer[1] = base64_tab[(value >> 12) & 0x3F]; |
| |
| if ( nBytes > 1 ) |
| { |
| out_buffer[2] = base64_tab[(value >> 6) & 0x3F]; |
| if ( nBytes > 2 ) |
| out_buffer[3] = base64_tab[(value >> 0) & 0x3F]; |
| } |
| |
| if ( nLineLength >= 76 ) |
| { |
| fputs( "\n", fout ); |
| nLineLength = 0; |
| } |
| |
| nBytesWritten += fwrite( out_buffer, 1, sizeof(out_buffer), fout ); |
| nLineLength += sizeof(out_buffer); |
| } |
| } while ( nBytes ); |
| |
| return nBytesWritten; |
| } |