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72 lines
1.7 KiB
72 lines
1.7 KiB
6 years ago
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#!/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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