Initial commit

node_modules/iconv-lite/lib/streams.js

@@ -0,0 +1,105 @@
+"use strict"
+
+var Buffer = require("safer-buffer").Buffer
+
+// NOTE: Due to 'stream' module being pretty large (~100Kb, significant in browser environments),
+// we opt to dependency-inject it instead of creating a hard dependency.
+module.exports = function (streamModule) {
+  var Transform = streamModule.Transform
+
+  // == Encoder stream =======================================================
+
+  function IconvLiteEncoderStream (conv, options) {
+    this.conv = conv
+    options = options || {}
+    options.decodeStrings = false // We accept only strings, so we don't need to decode them.
+    Transform.call(this, options)
+  }
+
+  IconvLiteEncoderStream.prototype = Object.create(Transform.prototype, {
+    constructor: { value: IconvLiteEncoderStream }
+  })
+
+  IconvLiteEncoderStream.prototype._transform = function (chunk, encoding, done) {
+    if (typeof chunk !== "string") {
+      return done(new Error("Iconv encoding stream needs strings as its input."))
+    }
+
+    try {
+      var res = this.conv.write(chunk)
+      if (res && res.length) this.push(res)
+      done()
+    } catch (e) {
+      done(e)
+    }
+  }
+
+  IconvLiteEncoderStream.prototype._flush = function (done) {
+    try {
+      var res = this.conv.end()
+      if (res && res.length) this.push(res)
+      done()
+    } catch (e) {
+      done(e)
+    }
+  }
+
+  IconvLiteEncoderStream.prototype.collect = function (cb) {
+    var chunks = []
+    this.on("error", cb)
+    this.on("data", function (chunk) { chunks.push(chunk) })
+    this.on("end", function () {
+      cb(null, Buffer.concat(chunks))
+    })
+    return this
+  }
+
+  // == Decoder stream =======================================================
+
+  function IconvLiteDecoderStream (conv, options) {
+    this.conv = conv
+    options = options || {}
+    options.encoding = this.encoding = "utf8" // We output strings.
+    Transform.call(this, options)
+  }
+
+  IconvLiteDecoderStream.prototype = Object.create(Transform.prototype, {
+    constructor: { value: IconvLiteDecoderStream }
+  })
+
+  IconvLiteDecoderStream.prototype._transform = function (chunk, encoding, done) {
+    if (!Buffer.isBuffer(chunk) && !(chunk instanceof Uint8Array)) { return done(new Error("Iconv decoding stream needs buffers as its input.")) }
+    try {
+      var res = this.conv.write(chunk)
+      if (res && res.length) this.push(res, this.encoding)
+      done()
+    } catch (e) {
+      done(e)
+    }
+  }
+
+  IconvLiteDecoderStream.prototype._flush = function (done) {
+    try {
+      var res = this.conv.end()
+      if (res && res.length) this.push(res, this.encoding)
+      done()
+    } catch (e) {
+      done(e)
+    }
+  }
+
+  IconvLiteDecoderStream.prototype.collect = function (cb) {
+    var res = ""
+    this.on("error", cb)
+    this.on("data", function (chunk) { res += chunk })
+    this.on("end", function () {
+      cb(null, res)
+    })
+    return this
+  }
+
+  return {
+    IconvLiteEncoderStream: IconvLiteEncoderStream,
+    IconvLiteDecoderStream: IconvLiteDecoderStream
+  }
+}