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false\n }\n\n let i = 0\n for (; i < 16; i++) {\n if (uuid[offset + i] !== 0) {\n break\n }\n }\n if (i === 16) {\n return { version: undefined, variant: \"nil\", format: \"binary\" }\n }\n\n return {\n version: (uuid[offset + 6] & 0xf0) >> 4,\n variant: getVariant((uuid[offset + 8] & 0xe0) >> 5),\n format: \"binary\",\n }\n }\n\n throw newError(\"Unknown type of uuid\", \"ERR_UNKNOWN_UUID_TYPE\")\n }\n\n // read stringified uuid into a Buffer\n static parse(input: string) {\n const buffer = Buffer.allocUnsafe(16)\n let j = 0\n for (let i = 0; i < 16; i++) {\n buffer[i] = hex2byte[input[j++] + input[j++]]\n if (i === 3 || i === 5 || i === 7 || i === 9) {\n j += 1\n }\n }\n return buffer\n }\n}\n\n// according to rfc4122#section-4.1.1\nfunction getVariant(bits: number) {\n switch (bits) {\n case 0:\n case 1:\n case 3:\n return \"ncs\"\n case 4:\n case 5:\n return \"rfc4122\"\n case 6:\n return \"microsoft\"\n default:\n return \"future\"\n }\n}\n\nenum UuidEncoding {\n ASCII,\n BINARY,\n OBJECT,\n}\n\n// v3 + v5\nfunction uuidNamed(name: string | Buffer, hashMethod: string, version: number, namespace: Buffer, encoding: UuidEncoding = UuidEncoding.ASCII) {\n const hash = createHash(hashMethod)\n\n const nameIsNotAString = typeof name !== \"string\"\n if (nameIsNotAString && !Buffer.isBuffer(name)) {\n throw newError(invalidName, \"ERR_INVALID_UUID_NAME\")\n }\n\n hash.update(namespace)\n hash.update(name)\n\n const buffer = hash.digest()\n let result: any\n switch (encoding) {\n case UuidEncoding.BINARY:\n buffer[6] = (buffer[6] & 0x0f) | version\n buffer[8] = (buffer[8] & 0x3f) | 0x80\n result = buffer\n break\n case UuidEncoding.OBJECT:\n buffer[6] = (buffer[6] & 0x0f) | version\n buffer[8] = (buffer[8] & 0x3f) | 0x80\n result = new UUID(buffer)\n break\n default:\n result =\n byte2hex[buffer[0]] +\n byte2hex[buffer[1]] +\n byte2hex[buffer[2]] +\n byte2hex[buffer[3]] +\n \"-\" +\n byte2hex[buffer[4]] +\n byte2hex[buffer[5]] +\n \"-\" +\n byte2hex[(buffer[6] & 0x0f) | version] +\n byte2hex[buffer[7]] +\n \"-\" +\n byte2hex[(buffer[8] & 0x3f) | 0x80] +\n byte2hex[buffer[9]] +\n \"-\" +\n byte2hex[buffer[10]] +\n byte2hex[buffer[11]] +\n byte2hex[buffer[12]] +\n byte2hex[buffer[13]] +\n byte2hex[buffer[14]] +\n byte2hex[buffer[15]]\n break\n }\n return result\n}\n\nfunction stringify(buffer: Buffer) {\n return (\n byte2hex[buffer[0]] +\n byte2hex[buffer[1]] +\n byte2hex[buffer[2]] +\n byte2hex[buffer[3]] +\n \"-\" +\n byte2hex[buffer[4]] +\n byte2hex[buffer[5]] +\n \"-\" +\n byte2hex[buffer[6]] +\n byte2hex[buffer[7]] +\n \"-\" +\n byte2hex[buffer[8]] +\n byte2hex[buffer[9]] +\n \"-\" +\n byte2hex[buffer[10]] +\n byte2hex[buffer[11]] +\n byte2hex[buffer[12]] +\n byte2hex[buffer[13]] +\n byte2hex[buffer[14]] +\n byte2hex[buffer[15]]\n )\n}\n\n// according to rfc4122#section-4.1.7\nexport const nil = new UUID(\"00000000-0000-0000-0000-000000000000\")\n\n// UUID.v4 = uuidRandom\n\n// UUID.v4fast = uuidRandomFast\n\n// UUID.v3 = function(options, callback) {\n// return uuidNamed(\"md5\", 0x30, options, callback)\n// }\n"]} |