From 5b10a10743b8459f64fe83e0ff420f69da79c9a4 Mon Sep 17 00:00:00 2001 From: Yuchen Pei Date: Thu, 28 Jul 2022 15:32:10 +1000 Subject: Moving scripts and utilities into a new utilities dir --- .../node_modules/iconv-lite/encodings/utf16.js | 177 --------------------- 1 file changed, 177 deletions(-) delete mode 100644 hash_script/node_modules/iconv-lite/encodings/utf16.js (limited to 'hash_script/node_modules/iconv-lite/encodings/utf16.js') diff --git a/hash_script/node_modules/iconv-lite/encodings/utf16.js b/hash_script/node_modules/iconv-lite/encodings/utf16.js deleted file mode 100644 index 7e8f159..0000000 --- a/hash_script/node_modules/iconv-lite/encodings/utf16.js +++ /dev/null @@ -1,177 +0,0 @@ -"use strict"; -var Buffer = require("buffer").Buffer; - -// Note: UTF16-LE (or UCS2) codec is Node.js native. See encodings/internal.js - -// == UTF16-BE codec. ========================================================== - -exports.utf16be = Utf16BECodec; -function Utf16BECodec() { -} - -Utf16BECodec.prototype.encoder = Utf16BEEncoder; -Utf16BECodec.prototype.decoder = Utf16BEDecoder; -Utf16BECodec.prototype.bomAware = true; - - -// -- Encoding - -function Utf16BEEncoder() { -} - -Utf16BEEncoder.prototype.write = function(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; -} - -Utf16BEEncoder.prototype.end = function() { -} - - -// -- Decoding - -function Utf16BEDecoder() { - this.overflowByte = -1; -} - -Utf16BEDecoder.prototype.write = function(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'); -} - -Utf16BEDecoder.prototype.end = function() { -} - - -// == UTF-16 codec ============================================================= -// Decoder chooses automatically from UTF-16LE and UTF-16BE using BOM and space-based heuristic. -// Defaults to UTF-16LE, as it's prevalent and default in Node. -// http://en.wikipedia.org/wiki/UTF-16 and http://encoding.spec.whatwg.org/#utf-16le -// Decoder default can be changed: iconv.decode(buf, 'utf16', {defaultEncoding: 'utf-16be'}); - -// Encoder uses UTF-16LE and prepends BOM (which can be overridden with addBOM: false). - -exports.utf16 = Utf16Codec; -function Utf16Codec(codecOptions, iconv) { - this.iconv = iconv; -} - -Utf16Codec.prototype.encoder = Utf16Encoder; -Utf16Codec.prototype.decoder = Utf16Decoder; - - -// -- Encoding (pass-through) - -function Utf16Encoder(options, codec) { - options = options || {}; - if (options.addBOM === undefined) - options.addBOM = true; - this.encoder = codec.iconv.getEncoder('utf-16le', options); -} - -Utf16Encoder.prototype.write = function(str) { - return this.encoder.write(str); -} - -Utf16Encoder.prototype.end = function() { - return this.encoder.end(); -} - - -// -- Decoding - -function Utf16Decoder(options, codec) { - this.decoder = null; - this.initialBytes = []; - this.initialBytesLen = 0; - - this.options = options || {}; - this.iconv = codec.iconv; -} - -Utf16Decoder.prototype.write = function(buf) { - if (!this.decoder) { - // Codec is not chosen yet. Accumulate initial bytes. - this.initialBytes.push(buf); - this.initialBytesLen += buf.length; - - if (this.initialBytesLen < 16) // We need more bytes to use space heuristic (see below) - return ''; - - // We have enough bytes -> detect endianness. - var buf = Buffer.concat(this.initialBytes), - encoding = detectEncoding(buf, this.options.defaultEncoding); - this.decoder = this.iconv.getDecoder(encoding, this.options); - this.initialBytes.length = this.initialBytesLen = 0; - } - - return this.decoder.write(buf); -} - -Utf16Decoder.prototype.end = function() { - if (!this.decoder) { - var buf = Buffer.concat(this.initialBytes), - encoding = detectEncoding(buf, this.options.defaultEncoding); - this.decoder = this.iconv.getDecoder(encoding, this.options); - - var res = this.decoder.write(buf), - trail = this.decoder.end(); - - return trail ? (res + trail) : res; - } - return this.decoder.end(); -} - -function detectEncoding(buf, defaultEncoding) { - var enc = defaultEncoding || 'utf-16le'; - - if (buf.length >= 2) { - // Check BOM. - if (buf[0] == 0xFE && buf[1] == 0xFF) // UTF-16BE BOM - enc = 'utf-16be'; - else if (buf[0] == 0xFF && buf[1] == 0xFE) // UTF-16LE BOM - enc = 'utf-16le'; - else { - // No BOM found. Try to deduce encoding from initial content. - // Most of the time, the content has ASCII chars (U+00**), but the opposite (U+**00) is uncommon. - // So, we count ASCII as if it was LE or BE, and decide from that. - var asciiCharsLE = 0, asciiCharsBE = 0, // Counts of 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] === 0 && buf[i+1] !== 0) asciiCharsBE++; - if (buf[i] !== 0 && buf[i+1] === 0) asciiCharsLE++; - } - - if (asciiCharsBE > asciiCharsLE) - enc = 'utf-16be'; - else if (asciiCharsBE < asciiCharsLE) - enc = 'utf-16le'; - } - } - - return enc; -} - - -- cgit v1.2.3