清空

2023-12-13 11:25:22 +08:00
parent 7c2ab0b7ad
commit cff33ad7d1
6370 changed files with 378844 additions and 82245 deletions
@@ -0,0 +1,28 @@
+'use strict';
+var $ = require('../internals/export');
+var global = require('../internals/global');
+var uncurryThis = require('../internals/function-uncurry-this');
+var aString = require('../internals/a-string');
+
+var Uint8Array = global.Uint8Array;
+var SyntaxError = global.SyntaxError;
+var parseInt = global.parseInt;
+var NOT_HEX = /[^\da-f]/i;
+var exec = uncurryThis(NOT_HEX.exec);
+var stringSlice = uncurryThis(''.slice);
+
+// `Uint8Array.fromHex` method
+// https://github.com/tc39/proposal-arraybuffer-base64
+if (Uint8Array) $({ target: 'Uint8Array', stat: true, forced: true }, {
+  fromHex: function fromHex(string) {
+    aString(string);
+    var stringLength = string.length;
+    if (stringLength % 2) throw new SyntaxError('String should have an even number of characters');
+    if (exec(NOT_HEX, string)) throw new SyntaxError('String should only contain hex characters');
+    var result = new Uint8Array(stringLength / 2);
+    for (var i = 0; i < stringLength; i += 2) {
+      result[i / 2] = parseInt(stringSlice(string, i, i + 2), 16);
+    }
+    return result;
+  }
+});