flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
27 lines
1007 B
JavaScript
27 lines
1007 B
JavaScript
'use strict';
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var globalThis = require('../internals/global-this');
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var uncurryThis = require('../internals/function-uncurry-this');
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var Uint8Array = globalThis.Uint8Array;
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var SyntaxError = globalThis.SyntaxError;
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var min = Math.min;
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var stringMatch = uncurryThis(''.match);
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module.exports = function (string, into) {
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var stringLength = string.length;
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if (stringLength % 2 !== 0) throw new SyntaxError('String should be an even number of characters');
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var maxLength = into ? min(into.length, stringLength / 2) : stringLength / 2;
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var bytes = into || new Uint8Array(maxLength);
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var segments = stringMatch(string, /.{2}/g);
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var written = 0;
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for (; written < maxLength; written++) {
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var result = +('0x' + segments[written] + '0');
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// eslint-disable-next-line no-self-compare -- NaN check
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if (result !== result) {
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throw new SyntaxError('String should only contain hex characters');
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}
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bytes[written] = result >> 4;
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}
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return { bytes: bytes, read: written << 1 };
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};
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