| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | #!/usr/bin/env node |
| 2 | |
| 3 | var program = require('commander'); |
| 4 | var Bunzip = require('../'); |
| 5 | var fs = require('fs'); |
| 6 | |
| 7 | program |
| 8 | .version(Bunzip.version) |
| 9 | .usage('[infile]') |
| 10 | .option('-m, --multistream', |
| 11 | 'Read a multistream bzip2 file'); |
| 12 | program.on('--help', function() { |
| 13 | console.log(' If <infile> is omitted, reads from stdin.'); |
| 14 | }); |
| 15 | program.parse(process.argv); |
| 16 | |
| 17 | var makeInStream = function(in_fd) { |
| 18 | var stat = fs.fstatSync(in_fd); |
| 19 | var stream = { |
| 20 | buffer: new Buffer(4096), |
| 21 | totalPos: 0, |
| 22 | pos: 0, |
| 23 | end: 0, |
| 24 | _fillBuffer: function() { |
| 25 | this.end = fs.readSync(in_fd, this.buffer, 0, this.buffer.length); |
| 26 | this.pos = 0; |
| 27 | }, |
| 28 | readByte: function() { |
| 29 | if (this.pos >= this.end) { this._fillBuffer(); } |
| 30 | if (this.pos < this.end) { |
| 31 | this.totalPos++; |
| 32 | return this.buffer[this.pos++]; |
| 33 | } |
| 34 | return -1; |
| 35 | }, |
| 36 | read: function(buffer, bufOffset, length) { |
| 37 | if (this.pos >= this.end) { this._fillBuffer(); } |
| 38 | var bytesRead = 0; |
| 39 | while (bytesRead < length && this.pos < this.end) { |
| 40 | buffer[bufOffset++] = this.buffer[this.pos++]; |
| 41 | bytesRead++; |
| 42 | } |
| 43 | this.totalPos += bytesRead; |
| 44 | return bytesRead; |
| 45 | }, |
| 46 | eof: function() { |
| 47 | if (this.pos >= this.end) { this._fillBuffer(); } |
| 48 | return !(this.pos < this.end); |
| 49 | } |
| 50 | }; |
| 51 | if (stat.size) { |
| 52 | stream.size = stat.size; |
| 53 | } |
| 54 | return stream; |
| 55 | }; |
| 56 | |
| 57 | var in_fd = 0, close_in = function(){}; |
| 58 | if (program.args.length > 0) { |
| 59 | in_fd = fs.openSync(program.args.shift(), 'r'); |
| 60 | close_in = function() { fs.closeSync(in_fd); }; |
| 61 | } |
| 62 | |
| 63 | var inStream = makeInStream(in_fd); |
| 64 | |
| 65 | var report = function(position, blocksize) { |
| 66 | console.log(position+'\t'+blocksize); |
| 67 | }; |
| 68 | |
| 69 | Bunzip.table(inStream, report, program.multistream); |
| 70 | close_in(); |
| 71 | return 0; |