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author | Joel Kronqvist <work.joelkronqvist@pm.me> | 2022-03-11 20:46:06 +0200 |
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committer | Joel Kronqvist <work.joelkronqvist@pm.me> | 2022-03-11 20:46:06 +0200 |
commit | 080c5819d87b933816d724a83f3bf4f1686770a7 (patch) | |
tree | 4a2ccc68b27edf7d4cbc586c932cc7542b655e19 /node_modules/abab/lib/btoa.js | |
parent | 5ac7049a9d30733165cc212dee308163c2a14644 (diff) | |
parent | d003b82235a9329f912522a2f70aa950dfce4998 (diff) | |
download | LYLLRuoka-080c5819d87b933816d724a83f3bf4f1686770a7.tar.gz LYLLRuoka-080c5819d87b933816d724a83f3bf4f1686770a7.zip |
Merge branch 'master' of https://github.com/JoelHMikael/FoodJS
Updating remote changes
Diffstat (limited to 'node_modules/abab/lib/btoa.js')
-rw-r--r-- | node_modules/abab/lib/btoa.js | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/node_modules/abab/lib/btoa.js b/node_modules/abab/lib/btoa.js new file mode 100644 index 0000000..131a679 --- /dev/null +++ b/node_modules/abab/lib/btoa.js @@ -0,0 +1,58 @@ +"use strict"; + +/** + * btoa() as defined by the HTML and Infra specs, which mostly just references + * RFC 4648. + */ +function btoa(s) { + let i; + // String conversion as required by Web IDL. + s = `${s}`; + // "The btoa() method must throw an "InvalidCharacterError" DOMException if + // data contains any character whose code point is greater than U+00FF." + for (i = 0; i < s.length; i++) { + if (s.charCodeAt(i) > 255) { + return null; + } + } + let out = ""; + for (i = 0; i < s.length; i += 3) { + const groupsOfSix = [undefined, undefined, undefined, undefined]; + groupsOfSix[0] = s.charCodeAt(i) >> 2; + groupsOfSix[1] = (s.charCodeAt(i) & 0x03) << 4; + if (s.length > i + 1) { + groupsOfSix[1] |= s.charCodeAt(i + 1) >> 4; + groupsOfSix[2] = (s.charCodeAt(i + 1) & 0x0f) << 2; + } + if (s.length > i + 2) { + groupsOfSix[2] |= s.charCodeAt(i + 2) >> 6; + groupsOfSix[3] = s.charCodeAt(i + 2) & 0x3f; + } + for (let j = 0; j < groupsOfSix.length; j++) { + if (typeof groupsOfSix[j] === "undefined") { + out += "="; + } else { + out += btoaLookup(groupsOfSix[j]); + } + } + } + return out; +} + +/** + * Lookup table for btoa(), which converts a six-bit number into the + * corresponding ASCII character. + */ +const keystr = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + +function btoaLookup(index) { + if (index >= 0 && index < 64) { + return keystr[index]; + } + + // Throw INVALID_CHARACTER_ERR exception here -- won't be hit in the tests. + return undefined; +} + +module.exports = btoa; |