25 lines
754 B
JavaScript
25 lines
754 B
JavaScript
// 微信小程序 atob polyfill（bwip-js 字体解码依赖）
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// 此文件作为副作用导入，必须在 bwip-js 之前加载
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var _chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
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function _atob(input) {
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var str = String(input).replace(/[=]+$/, '')
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var output = ''
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var bc = 0, bs, buffer = 0, i = 0
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for (; str.charAt(i | 0); i++) {
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bs = _chars.indexOf(str.charAt(i))
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buffer = (buffer << 6) | bs
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bc += 6
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if (bc >= 8) {
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bc -= 8
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output += String.fromCharCode((buffer >>> bc) & 255)
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}
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}
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return output
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}
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// 同时设置 globalThis 和 global（兼容不同微信基础库版本）
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try { globalThis.atob = globalThis.atob || _atob } catch (e) {}
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try { global.atob = global.atob || _atob } catch (e) {}
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