diff options
Diffstat (limited to 'kittybox-rs/companion-lite/src/base64.ts')
-rw-r--r-- | kittybox-rs/companion-lite/src/base64.ts | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/kittybox-rs/companion-lite/src/base64.ts b/kittybox-rs/companion-lite/src/base64.ts deleted file mode 100644 index 2429894..0000000 --- a/kittybox-rs/companion-lite/src/base64.ts +++ /dev/null @@ -1,89 +0,0 @@ -// Array of bytes to Base64 string decoding -function b64ToUint6(nChr: number) { - return nChr > 64 && nChr < 91 - ? nChr - 65 - : nChr > 96 && nChr < 123 - ? nChr - 71 - : nChr > 47 && nChr < 58 - ? nChr + 4 - : nChr === 43 - ? 62 - : nChr === 47 - ? 63 - : 0; -} - -export function decode(sBase64: string, nBlocksSize?: number) { - const sB64Enc = sBase64.replace(/[^A-Za-z0-9+/]/g, ""); - const nInLen = sB64Enc.length; - const nOutLen = nBlocksSize - ? Math.ceil(((nInLen * 3 + 1) >> 2) / nBlocksSize) * nBlocksSize - : (nInLen * 3 + 1) >> 2; - const taBytes = new Uint8Array(nOutLen); - - let nMod3; - let nMod4; - let nUint24 = 0; - let nOutIdx = 0; - for (let nInIdx = 0; nInIdx < nInLen; nInIdx++) { - nMod4 = nInIdx & 3; - nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << (6 * (3 - nMod4)); - if (nMod4 === 3 || nInLen - nInIdx === 1) { - nMod3 = 0; - while (nMod3 < 3 && nOutIdx < nOutLen) { - taBytes[nOutIdx] = (nUint24 >>> ((16 >>> nMod3) & 24)) & 255; - nMod3++; - nOutIdx++; - } - nUint24 = 0; - } - } - - return taBytes; -} - -/* Base64 string to array encoding */ -function uint6ToB64(nUint6: number) { - return nUint6 < 26 - ? nUint6 + 65 - : nUint6 < 52 - ? nUint6 + 71 - : nUint6 < 62 - ? nUint6 - 4 - : nUint6 === 62 - ? 43 - : nUint6 === 63 - ? 47 - : 65; -} - -export function encode(aBytes: Uint8Array) { - let nMod3 = 2; - let sB64Enc = ""; - - const nLen = aBytes.length; - let nUint24 = 0; - for (let nIdx = 0; nIdx < nLen; nIdx++) { - nMod3 = nIdx % 3; - if (nIdx > 0 && ((nIdx * 4) / 3) % 76 === 0) { - sB64Enc += "\r\n"; - } - - nUint24 |= aBytes[nIdx] << ((16 >>> nMod3) & 24); - if (nMod3 === 2 || aBytes.length - nIdx === 1) { - sB64Enc += String.fromCodePoint( - uint6ToB64((nUint24 >>> 18) & 63), - uint6ToB64((nUint24 >>> 12) & 63), - uint6ToB64((nUint24 >>> 6) & 63), - uint6ToB64(nUint24 & 63) - ); - nUint24 = 0; - } - } - return ( - sB64Enc.substr(0, sB64Enc.length - 2 + nMod3) + - (nMod3 === 2 ? "" : nMod3 === 1 ? "=" : "==") - ); -} - -export default { encode, decode } |