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- var Stream = require('stream').Stream
- module.exports = legacy
- function legacy (fs) {
- return {
- ReadStream: ReadStream,
- WriteStream: WriteStream
- }
- function ReadStream (path, options) {
- if (!(this instanceof ReadStream)) return new ReadStream(path, options);
- Stream.call(this);
- var self = this;
- this.path = path;
- this.fd = null;
- this.readable = true;
- this.paused = false;
- this.flags = 'r';
- this.mode = 438;
- this.bufferSize = 64 * 1024;
- options = options || {};
-
- var keys = Object.keys(options);
- for (var index = 0, length = keys.length; index < length; index++) {
- var key = keys[index];
- this[key] = options[key];
- }
- if (this.encoding) this.setEncoding(this.encoding);
- if (this.start !== undefined) {
- if ('number' !== typeof this.start) {
- throw TypeError('start must be a Number');
- }
- if (this.end === undefined) {
- this.end = Infinity;
- } else if ('number' !== typeof this.end) {
- throw TypeError('end must be a Number');
- }
- if (this.start > this.end) {
- throw new Error('start must be <= end');
- }
- this.pos = this.start;
- }
- if (this.fd !== null) {
- process.nextTick(function() {
- self._read();
- });
- return;
- }
- fs.open(this.path, this.flags, this.mode, function (err, fd) {
- if (err) {
- self.emit('error', err);
- self.readable = false;
- return;
- }
- self.fd = fd;
- self.emit('open', fd);
- self._read();
- })
- }
- function WriteStream (path, options) {
- if (!(this instanceof WriteStream)) return new WriteStream(path, options);
- Stream.call(this);
- this.path = path;
- this.fd = null;
- this.writable = true;
- this.flags = 'w';
- this.encoding = 'binary';
- this.mode = 438;
- this.bytesWritten = 0;
- options = options || {};
-
- var keys = Object.keys(options);
- for (var index = 0, length = keys.length; index < length; index++) {
- var key = keys[index];
- this[key] = options[key];
- }
- if (this.start !== undefined) {
- if ('number' !== typeof this.start) {
- throw TypeError('start must be a Number');
- }
- if (this.start < 0) {
- throw new Error('start must be >= zero');
- }
- this.pos = this.start;
- }
- this.busy = false;
- this._queue = [];
- if (this.fd === null) {
- this._open = fs.open;
- this._queue.push([this._open, this.path, this.flags, this.mode, undefined]);
- this.flush();
- }
- }
- }
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