From 5b10a10743b8459f64fe83e0ff420f69da79c9a4 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <hi@ypei.me>
Date: Thu, 28 Jul 2022 15:32:10 +1000
Subject: Moving scripts and utilities into a new utilities dir

---
 .../node_modules/encoding/lib/encoding.js          | 113 +++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 utilities/hash_script/node_modules/encoding/lib/encoding.js

(limited to 'utilities/hash_script/node_modules/encoding/lib/encoding.js')

diff --git a/utilities/hash_script/node_modules/encoding/lib/encoding.js b/utilities/hash_script/node_modules/encoding/lib/encoding.js
new file mode 100644
index 0000000..cbea3ce
--- /dev/null
+++ b/utilities/hash_script/node_modules/encoding/lib/encoding.js
@@ -0,0 +1,113 @@
+'use strict';
+
+var iconvLite = require('iconv-lite');
+// Load Iconv from an external file to be able to disable Iconv for webpack
+// Add /\/iconv-loader$/ to webpack.IgnorePlugin to ignore it
+var Iconv = require('./iconv-loader');
+
+// Expose to the world
+module.exports.convert = convert;
+
+/**
+ * Convert encoding of an UTF-8 string or a buffer
+ *
+ * @param {String|Buffer} str String to be converted
+ * @param {String} to Encoding to be converted to
+ * @param {String} [from='UTF-8'] Encoding to be converted from
+ * @param {Boolean} useLite If set to ture, force to use iconvLite
+ * @return {Buffer} Encoded string
+ */
+function convert(str, to, from, useLite) {
+    from = checkEncoding(from || 'UTF-8');
+    to = checkEncoding(to || 'UTF-8');
+    str = str || '';
+
+    var result;
+
+    if (from !== 'UTF-8' && typeof str === 'string') {
+        str = new Buffer(str, 'binary');
+    }
+
+    if (from === to) {
+        if (typeof str === 'string') {
+            result = new Buffer(str);
+        } else {
+            result = str;
+        }
+    } else if (Iconv && !useLite) {
+        try {
+            result = convertIconv(str, to, from);
+        } catch (E) {
+            console.error(E);
+            try {
+                result = convertIconvLite(str, to, from);
+            } catch (E) {
+                console.error(E);
+                result = str;
+            }
+        }
+    } else {
+        try {
+            result = convertIconvLite(str, to, from);
+        } catch (E) {
+            console.error(E);
+            result = str;
+        }
+    }
+
+
+    if (typeof result === 'string') {
+        result = new Buffer(result, 'utf-8');
+    }
+
+    return result;
+}
+
+/**
+ * Convert encoding of a string with node-iconv (if available)
+ *
+ * @param {String|Buffer} str String to be converted
+ * @param {String} to Encoding to be converted to
+ * @param {String} [from='UTF-8'] Encoding to be converted from
+ * @return {Buffer} Encoded string
+ */
+function convertIconv(str, to, from) {
+    var response, iconv;
+    iconv = new Iconv(from, to + '//TRANSLIT//IGNORE');
+    response = iconv.convert(str);
+    return response.slice(0, response.length);
+}
+
+/**
+ * Convert encoding of astring with iconv-lite
+ *
+ * @param {String|Buffer} str String to be converted
+ * @param {String} to Encoding to be converted to
+ * @param {String} [from='UTF-8'] Encoding to be converted from
+ * @return {Buffer} Encoded string
+ */
+function convertIconvLite(str, to, from) {
+    if (to === 'UTF-8') {
+        return iconvLite.decode(str, from);
+    } else if (from === 'UTF-8') {
+        return iconvLite.encode(str, to);
+    } else {
+        return iconvLite.encode(iconvLite.decode(str, from), to);
+    }
+}
+
+/**
+ * Converts charset name if needed
+ *
+ * @param {String} name Character set
+ * @return {String} Character set name
+ */
+function checkEncoding(name) {
+    return (name || '').toString().trim().
+    replace(/^latin[\-_]?(\d+)$/i, 'ISO-8859-$1').
+    replace(/^win(?:dows)?[\-_]?(\d+)$/i, 'WINDOWS-$1').
+    replace(/^utf[\-_]?(\d+)$/i, 'UTF-$1').
+    replace(/^ks_c_5601\-1987$/i, 'CP949').
+    replace(/^us[\-_]?ascii$/i, 'ASCII').
+    toUpperCase();
+}
-- 
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