From dcdfc94cb39dfe2c39925a0145ffa45e2d061c30 Mon Sep 17 00:00:00 2001 From: Kumar Priyansh Date: Sat, 19 Jan 2019 12:37:14 +0530 Subject: Initial Upload via GIT --- .../stream-buffers/lib/writable_streambuffer.js | 97 ++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100755 cordova/node_modules/stream-buffers/lib/writable_streambuffer.js (limited to 'cordova/node_modules/stream-buffers/lib/writable_streambuffer.js') diff --git a/cordova/node_modules/stream-buffers/lib/writable_streambuffer.js b/cordova/node_modules/stream-buffers/lib/writable_streambuffer.js new file mode 100755 index 0000000..de1e997 --- /dev/null +++ b/cordova/node_modules/stream-buffers/lib/writable_streambuffer.js @@ -0,0 +1,97 @@ +var util = require("util"), + stream = require("stream"), + constants = require("./constants"); + +// TODO: clear up specs on returning false from a write and emitting a drain event. +// Does this mean if I return false from a write, I should ignore any write requests between that false return and the drain event? +var WritableStreamBuffer = module.exports = function(opts) { + var that = this; + + stream.Stream.call(this); + + opts = opts || {}; + var initialSize = opts.initialSize || constants.DEFAULT_INITIAL_SIZE; + var incrementAmount = opts.incrementAmount || constants.DEFAULT_INCREMENT_AMOUNT; + + var buffer = new Buffer(initialSize); + var size = 0; + + this.writable = true; + this.readable = false; + + this.size = function() { + return size; + }; + + this.maxSize = function() { + return buffer.length; + }; + + this.getContents = function(length) { + if(!size) return false; + + var data = new Buffer(Math.min(length || size, size)); + buffer.copy(data, 0, 0, data.length); + + if(data.length < size) + buffer.copy(buffer, 0, data.length); + + size -= data.length; + + return data; + }; + + this.getContentsAsString = function(encoding, length) { + if(!size) return false; + + var data = buffer.toString(encoding || "utf8", 0, Math.min(length || size, size)); + var dataLength = Buffer.byteLength(data); + + if(dataLength < size) + buffer.copy(buffer, 0, dataLength); + + size -= dataLength; + return data; + }; + + var increaseBufferIfNecessary = function(incomingDataSize) { + if((buffer.length - size) < incomingDataSize) { + var factor = Math.ceil((incomingDataSize - (buffer.length - size)) / incrementAmount); + + var newBuffer = new Buffer(buffer.length + (incrementAmount * factor)); + buffer.copy(newBuffer, 0, 0, size); + buffer = newBuffer; + } + }; + + this.write = function(data, encoding, callback) { + if(!that.writable) return; + + if(Buffer.isBuffer(data)) { + increaseBufferIfNecessary(data.length); + data.copy(buffer, size, 0); + size += data.length; + } + else { + data = data + ""; + increaseBufferIfNecessary(Buffer.byteLength(data)); + buffer.write(data, size, encoding || "utf8"); + size += Buffer.byteLength(data); + } + + if(typeof callback === "function") { callback() ;} + }; + + this.end = function() { + var args = Array.prototype.slice.apply(arguments); + if(args.length) that.write.apply(that, args); + that.emit('finish'); + that.destroy(); + }; + + this.destroySoon = this.destroy = function() { + that.writable = false; + that.emit("close"); + }; +}; +util.inherits(WritableStreamBuffer, stream.Stream); -- cgit v1.2.3