Initial commit for OpenECOMP SDN-C OA&M

[sdnc/oam.git] / dgbuilder / dgeflows / node_modules / body-parser / node_modules / iconv-lite / encodings / utf16.js

diff --git a/dgbuilder/dgeflows/node_modules/body-parser/node_modules/iconv-lite/encodings/utf16.js b/dgbuilder/dgeflows/node_modules/body-parser/node_modules/iconv-lite/encodings/utf16.js
new file mode 100644 (file)
index 0000000..4cd425d
--- /dev/null
+++ b/dgbuilder/dgeflows/node_modules/body-parser/node_modules/iconv-lite/encodings/utf16.js
@@ -0,0 +1,202 @@
+
+
+// == UTF16-BE codec. ==========================================================
+
+exports.utf16be = function(options) {
+    return {
+        encoder: utf16beEncoder,
+        decoder: utf16beDecoder,
+
+        bom: new Buffer([0xFE, 0xFF]),
+    };
+};
+
+
+// -- Encoding
+
+function utf16beEncoder(options) {
+    return {
+        write: utf16beEncoderWrite,
+        end: function() {},
+    }
+}
+
+function utf16beEncoderWrite(str) {
+    var buf = new Buffer(str, 'ucs2');
+    for (var i = 0; i < buf.length; i += 2) {
+        var tmp = buf[i]; buf[i] = buf[i+1]; buf[i+1] = tmp;
+    }
+    return buf;
+}
+
+
+// -- Decoding
+
+function utf16beDecoder(options) {
+    return {
+        write: utf16beDecoderWrite,
+        end: function() {},
+
+        overflowByte: -1,
+    };
+}
+
+function utf16beDecoderWrite(buf) {
+    if (buf.length == 0)
+        return '';
+
+    var buf2 = new Buffer(buf.length + 1),
+        i = 0, j = 0;
+
+    if (this.overflowByte !== -1) {
+        buf2[0] = buf[0];
+        buf2[1] = this.overflowByte;
+        i = 1; j = 2;
+    }
+
+    for (; i < buf.length-1; i += 2, j+= 2) {
+        buf2[j] = buf[i+1];
+        buf2[j+1] = buf[i];
+    }
+
+    this.overflowByte = (i == buf.length-1) ? buf[buf.length-1] : -1;
+
+    return buf2.slice(0, j).toString('ucs2');
+}
+
+
+// == UTF-16 codec =============================================================
+// Decoder chooses automatically from UTF-16LE and UTF-16BE using BOM and space-based heuristic.
+// Defaults to UTF-16BE, according to RFC 2781, although it is against some industry practices, see
+// http://en.wikipedia.org/wiki/UTF-16 and http://encoding.spec.whatwg.org/#utf-16le
+// Decoder default can be changed: iconv.decode(buf, 'utf16', {default: 'utf-16le'});
+
+// Encoder prepends BOM and uses UTF-16BE.
+// Endianness can also be changed: iconv.encode(str, 'utf16', {use: 'utf-16le'});
+
+exports.utf16 = function(options) {
+    return {
+        encoder: utf16Encoder,
+        decoder: utf16Decoder,
+
+        getCodec: options.iconv.getCodec,
+    };
+};
+
+// -- Encoding
+
+function utf16Encoder(options) {
+    options = options || {};
+    var codec = this.getCodec(options.use || 'utf-16be');
+    if (!codec.bom)
+        throw new Error("iconv-lite: in UTF-16 encoder, 'use' parameter should be either UTF-16BE or UTF16-LE.");
+
+    return {
+        write: utf16EncoderWrite,
+        end: utf16EncoderEnd,
+
+        bom: codec.bom,
+        internalEncoder: codec.encoder(options),
+    };
+}
+
+function utf16EncoderWrite(str) {
+    var buf = this.internalEncoder.write(str);
+
+    if (this.bom) {
+        buf = Buffer.concat([this.bom, buf]);
+        this.bom = null;
+    }
+
+    return buf;
+}
+
+function utf16EncoderEnd() {
+    return this.internalEncoder.end();
+}
+
+
+// -- Decoding
+
+function utf16Decoder(options) {
+    return {
+        write: utf16DecoderWrite,
+        end: utf16DecoderEnd,
+
+        internalDecoder: null,
+        initialBytes: [],
+        initialBytesLen: 0,
+
+        options: options || {},
+        getCodec: this.getCodec,
+    };
+}
+
+function utf16DecoderWrite(buf) {
+    if (this.internalDecoder)
+        return this.internalDecoder.write(buf);
+
+    // Codec is not chosen yet. Accumulate initial bytes.
+    this.initialBytes.push(buf);
+    this.initialBytesLen += buf.length;
+    
+    if (this.initialBytesLen < 16) // We need > 2 bytes to use space heuristic (see below)
+        return '';
+
+    // We have enough bytes -> decide endianness.
+    return utf16DecoderDecideEndianness.call(this);
+}
+
+function utf16DecoderEnd() {
+    if (this.internalDecoder)
+        return this.internalDecoder.end();
+
+    var res = utf16DecoderDecideEndianness.call(this);
+    var trail;
+
+    if (this.internalDecoder)
+        trail = this.internalDecoder.end();
+
+    return (trail && trail.length > 0) ? (res + trail) : res;
+}
+
+function utf16DecoderDecideEndianness() {
+    var buf = Buffer.concat(this.initialBytes);
+    this.initialBytes.length = this.initialBytesLen = 0;
+
+    if (buf.length < 2)
+        return ''; // Not a valid UTF-16 sequence anyway.
+
+    // Default encoding.
+    var enc = this.options.default || 'utf-16be';
+
+    // Check BOM.
+    if (buf[0] == 0xFE && buf[1] == 0xFF) { // UTF-16BE BOM
+        enc = 'utf-16be'; buf = buf.slice(2);
+    }
+    else if (buf[0] == 0xFF && buf[1] == 0xFE) { // UTF-16LE BOM
+        enc = 'utf-16le'; buf = buf.slice(2);
+    }
+    else {
+        // No BOM found. Try to deduce encoding from initial content.
+        // Most of the time, the content has spaces (U+0020), but the opposite (U+2000) is very uncommon.
+        // So, we count spaces as if it was LE or BE, and decide from that.
+        var spaces = [0, 0], // Counts of space chars in both positions
+            _len = Math.min(buf.length - (buf.length % 2), 64); // Len is always even.
+
+        for (var i = 0; i < _len; i += 2) {
+            if (buf[i] == 0x00 && buf[i+1] == 0x20) spaces[0]++;
+            if (buf[i] == 0x20 && buf[i+1] == 0x00) spaces[1]++;
+        }
+
+        if (spaces[0] > 0 && spaces[1] == 0)  
+            enc = 'utf-16be';
+        else if (spaces[0] == 0 && spaces[1] > 0)
+            enc = 'utf-16le';
+    }
+
+    this.internalDecoder = this.getCodec(enc).decoder(this.options);
+    return this.internalDecoder.write(buf);
+}
+
+