Update to NPM version

ProjectSourceCode/node_modules/memorystream/index.js

@@ -0,0 +1,209 @@
+'use strict';
+
+var STREAM = require('stream'),
+    UTIL = require('util'),
+    StringDecoder = require('string_decoder').StringDecoder;
+
+function MemoryReadableStream(data, options) {
+    if (!(this instanceof MemoryReadableStream))
+        return new MemoryReadableStream(data, options);
+    MemoryReadableStream.super_.call(this, options);
+    this.init(data, options);
+}
+UTIL.inherits(MemoryReadableStream, STREAM.Readable);
+
+
+function MemoryWritableStream(data, options) {
+    if (!(this instanceof MemoryWritableStream))
+        return new MemoryWritableStream(data, options);
+    MemoryWritableStream.super_.call(this, options);
+    this.init(data, options);
+}
+UTIL.inherits(MemoryWritableStream, STREAM.Writable);
+
+
+function MemoryDuplexStream(data, options) {
+    if (!(this instanceof MemoryDuplexStream))
+        return new MemoryDuplexStream(data, options);
+    MemoryDuplexStream.super_.call(this, options);
+    this.init(data, options);
+}
+UTIL.inherits(MemoryDuplexStream, STREAM.Duplex);
+
+
+MemoryReadableStream.prototype.init =
+MemoryWritableStream.prototype.init =
+MemoryDuplexStream.prototype.init = function init (data, options) {
+    var self = this;
+    this.queue = [];
+
+    if (data) {
+        if (!Array.isArray(data)) {
+            data = [ data ];
+        }
+
+        data.forEach(function (chunk) {
+            if (!(chunk instanceof Buffer)) {
+                chunk = new Buffer(chunk);
+            }
+            self.queue.push(chunk);
+        });
+
+    }
+    
+    options = options || {};
+    
+    this.maxbufsize = options.hasOwnProperty('maxbufsize') ? options.maxbufsize
+            : null;
+    this.bufoverflow = options.hasOwnProperty('bufoverflow') ? options.bufoverflow
+            : null;
+    this.frequence = options.hasOwnProperty('frequence') ? options.frequence
+            : null;
+};
+
+function MemoryStream (data, options) {
+    if (!(this instanceof MemoryStream))
+        return new MemoryStream(data, options);
+    
+    options = options || {};
+    
+    var readable = options.hasOwnProperty('readable') ? options.readable : true,
+        writable = options.hasOwnProperty('writable') ? options.writable : true;
+    
+    if (readable && writable) {
+        return new MemoryDuplexStream(data, options);
+    } else if (readable) {
+        return new MemoryReadableStream(data, options);
+    } else if (writable) {
+        return new MemoryWritableStream(data, options);
+    } else {
+        throw new Error("Unknown stream type  Readable, Writable or Duplex ");
+    }
+}
+
+
+MemoryStream.createReadStream = function (data, options) {
+    options = options || {};
+    options.readable = true;
+    options.writable = false;
+
+    return new MemoryStream(data, options);
+};
+
+
+MemoryStream.createWriteStream = function (data, options) {
+    options = options || {};
+    options.readable = false;
+    options.writable = true;
+
+    return new MemoryStream(data, options);
+};
+
+
+MemoryReadableStream.prototype._read =
+MemoryDuplexStream.prototype._read = function _read (n) {
+    var self = this,
+        frequence = self.frequence || 0,
+        wait_data = this instanceof STREAM.Duplex && ! this._writableState.finished ? true : false;
+    if ( ! this.queue.length && ! wait_data) {
+        this.push(null);// finish stream
+    } else if (this.queue.length) {
+        setTimeout(function () {
+            if (self.queue.length) {
+                var chunk = self.queue.shift();
+                if (chunk && ! self._readableState.ended) {
+                    if ( ! self.push(chunk) ) {
+                        self.queue.unshift(chunk);
+                    }
+                }
+            }
+        }, frequence);
+    }
+};
+
+
+MemoryWritableStream.prototype._write =
+MemoryDuplexStream.prototype._write = function _write (chunk, encoding, cb) {
+    var decoder = null;
+    try {
+        decoder = this.decodeStrings && encoding ? new StringDecoder(encoding) : null;
+    } catch (err){
+        return cb(err);
+    }
+    
+    var decoded_chunk = decoder ? decoder.write(chunk) : chunk,
+        queue_size = this._getQueueSize(),
+        chunk_size = decoded_chunk.length;
+    
+    if (this.maxbufsize && (queue_size + chunk_size) > this.maxbufsize ) {
+        if (this.bufoverflow) {
+            return cb("Buffer overflowed (" + this.bufoverflow + "/" + queue_size + ")");
+        } else {
+            return cb();
+        }
+    }
+    
+    if (this instanceof STREAM.Duplex) {
+        while (this.queue.length) {
+            this.push(this.queue.shift());
+        }
+        this.push(decoded_chunk);
+    } else {
+        this.queue.push(decoded_chunk);
+    }
+    cb();
+};
+
+
+MemoryDuplexStream.prototype.end = function (chunk, encoding, cb) {
+    var self = this;
+    return MemoryDuplexStream.super_.prototype.end.call(this, chunk, encoding, function () {
+        self.push(null);//finish readble stream too
+        if (cb) cb();
+    });
+};
+
+
+MemoryReadableStream.prototype._getQueueSize =  
+MemoryWritableStream.prototype._getQueueSize = 
+MemoryDuplexStream.prototype._getQueueSize = function () {
+    var queuesize = 0, i;
+    for (i = 0; i < this.queue.length; i++) {
+        queuesize += Array.isArray(this.queue[i]) ? this.queue[i][0].length
+                : this.queue[i].length;
+    }
+    return queuesize;
+};
+
+
+MemoryWritableStream.prototype.toString = 
+MemoryDuplexStream.prototype.toString = 
+MemoryReadableStream.prototype.toString = 
+MemoryWritableStream.prototype.getAll = 
+MemoryDuplexStream.prototype.getAll = 
+MemoryReadableStream.prototype.getAll = function () {
+    var self = this,
+        ret = '';
+    this.queue.forEach(function (data) {
+        ret += data;
+    });
+    return ret;
+};
+
+
+MemoryWritableStream.prototype.toBuffer = 
+MemoryDuplexStream.prototype.toBuffer = 
+MemoryReadableStream.prototype.toBuffer = function () {
+    var buffer = new Buffer(this._getQueueSize()),
+        currentOffset = 0;
+
+    this.queue.forEach(function (data) {
+        var data_buffer = data instanceof Buffer ? data : new Buffer(data);
+        data_buffer.copy(buffer, currentOffset);
+        currentOffset += data.length;
+    });
+    return buffer;
+};
+
+
+module.exports = MemoryStream;