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author | 2020-11-18 23:26:45 +0100 | |
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committer | 2020-11-18 23:26:45 +0100 | |
commit | 81ddf9b700bc48a1f8e472209f080f9c1d9a9b09 (patch) | |
tree | 8b959d50c5a614cbf9fcb346ed556140374d4b6d /node_modules/memorystream/index.js | |
parent | 1870f3fdf43707a15fda0f609a021f516f45eb63 (diff) | |
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rm node_modules
Diffstat (limited to 'node_modules/memorystream/index.js')
-rw-r--r-- | node_modules/memorystream/index.js | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/node_modules/memorystream/index.js b/node_modules/memorystream/index.js deleted file mode 100644 index 38d46ca..0000000 --- a/node_modules/memorystream/index.js +++ /dev/null @@ -1,209 +0,0 @@ -'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; |