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32 lines
852 B
32 lines
852 B
'use strict' |
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var codes = require('../character/codes.js') |
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var values = require('../character/values.js') |
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var fromCharCode = require('../constant/from-char-code.js') |
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function safeFromInt(value, base) { |
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var code = parseInt(value, base) |
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if ( |
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// C0 except for HT, LF, FF, CR, space |
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code < codes.ht || |
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code === codes.vt || |
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(code > codes.cr && code < codes.space) || |
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// Control character (DEL) of the basic block and C1 controls. |
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(code > codes.tilde && code < 160) || |
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// Lone high surrogates and low surrogates. |
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(code > 55295 && code < 57344) || |
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// Noncharacters. |
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(code > 64975 && code < 65008) || |
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(code & 65535) === 65535 || |
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(code & 65535) === 65534 || |
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// Out of range |
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code > 1114111 |
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) { |
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return values.replacementCharacter |
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} |
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return fromCharCode(code) |
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} |
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module.exports = safeFromInt
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