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node_modules/iconv-lite/lib/streams.js

@@ -1,121 +1,109 @@
 "use strict";
 
-var Buffer = require("buffer").Buffer,
-    Transform = require("stream").Transform;
+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(stream_module) {
+    var Transform = stream_module.Transform;
 
-// == Exports ==================================================================
-module.exports = function(iconv) {
-    
-    // Additional Public API.
-    iconv.encodeStream = function encodeStream(encoding, options) {
-        return new IconvLiteEncoderStream(iconv.getEncoder(encoding, options), options);
+    // == 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);
     }
 
-    iconv.decodeStream = function decodeStream(encoding, options) {
-        return new IconvLiteDecoderStream(iconv.getDecoder(encoding, options), 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);
+        }
     }
 
-    iconv.supportsStreams = true;
+    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;
+    }
 
 
-    // Not published yet.
-    iconv.IconvLiteEncoderStream = IconvLiteEncoderStream;
-    iconv.IconvLiteDecoderStream = IconvLiteDecoderStream;
-    iconv._collect = IconvLiteDecoderStream.prototype.collect;
+    // == 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,
+    };
 };
-
-
-// == 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))
-        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;
-}
-