[backend] fix: 修复异常处理和类型转换问题

2026-01-26 11:53:40 +08:00
parent 7ccc2a6ac6
commit 83e05bf85f
28639 changed files with 2506458 additions and 93 deletions
@@ -0,0 +1,19 @@
+'use strict';
+
+var modulo = require('./modulo');
+var ToNumber = require('./ToNumber');
+var truncate = require('./truncate');
+
+var isFinite = require('math-intrinsics/isFinite');
+
+// https://262.ecma-international.org/14.0/#sec-toint8
+
+module.exports = function ToInt8(argument) {
+	var number = ToNumber(argument);
+	if (!isFinite(number) || number === 0) {
+		return 0;
+	}
+	var int = truncate(number);
+	var int8bit = modulo(int, 0x100);
+	return int8bit >= 0x80 ? int8bit - 0x100 : int8bit;
+};