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71 lines
1.7 KiB
71 lines
1.7 KiB
#!/usr/bin/env node |
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var program = require('commander'); |
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var Bunzip = require('../'); |
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var fs = require('fs'); |
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program |
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.version(Bunzip.version) |
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.usage('[infile]') |
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.option('-m, --multistream', |
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'Read a multistream bzip2 file'); |
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program.on('--help', function() { |
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console.log(' If <infile> is omitted, reads from stdin.'); |
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}); |
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program.parse(process.argv); |
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var makeInStream = function(in_fd) { |
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var stat = fs.fstatSync(in_fd); |
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var stream = { |
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buffer: new Buffer(4096), |
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totalPos: 0, |
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pos: 0, |
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end: 0, |
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_fillBuffer: function() { |
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this.end = fs.readSync(in_fd, this.buffer, 0, this.buffer.length); |
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this.pos = 0; |
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}, |
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readByte: function() { |
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if (this.pos >= this.end) { this._fillBuffer(); } |
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if (this.pos < this.end) { |
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this.totalPos++; |
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return this.buffer[this.pos++]; |
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} |
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return -1; |
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}, |
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read: function(buffer, bufOffset, length) { |
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if (this.pos >= this.end) { this._fillBuffer(); } |
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var bytesRead = 0; |
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while (bytesRead < length && this.pos < this.end) { |
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buffer[bufOffset++] = this.buffer[this.pos++]; |
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bytesRead++; |
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} |
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this.totalPos += bytesRead; |
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return bytesRead; |
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}, |
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eof: function() { |
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if (this.pos >= this.end) { this._fillBuffer(); } |
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return !(this.pos < this.end); |
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} |
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}; |
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if (stat.size) { |
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stream.size = stat.size; |
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} |
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return stream; |
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}; |
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var in_fd = 0, close_in = function(){}; |
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if (program.args.length > 0) { |
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in_fd = fs.openSync(program.args.shift(), 'r'); |
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close_in = function() { fs.closeSync(in_fd); }; |
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} |
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var inStream = makeInStream(in_fd); |
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var report = function(position, blocksize) { |
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console.log(position+'\t'+blocksize); |
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}; |
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Bunzip.table(inStream, report, program.multistream); |
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close_in(); |
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return 0;
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