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pos(buf.subarray(1, buf.length))\n : pre === 0xff ? twos(buf)\n : null\n if (value === null) {\n throw Error('invalid base256 encoding')\n }\n\n if (!Number.isSafeInteger(value)) {\n // The number is so large that javascript cannot represent it with integer\n // precision.\n throw Error(\n 'parsed number outside of javascript safe integer range',\n )\n }\n\n return value\n}\n\nconst twos = (buf: Buffer) => {\n var len = buf.length\n var sum = 0\n var flipped = false\n for (var i = len - 1; i > -1; i--) {\n var byte = Number(buf[i])\n var f\n if (flipped) {\n f = onesComp(byte)\n } else if (byte === 0) {\n f = byte\n } else {\n flipped = true\n f = twosComp(byte)\n }\n if (f !== 0) {\n sum -= f * Math.pow(256, len - i - 1)\n }\n }\n return sum\n}\n\nconst pos = (buf: Buffer) => {\n var len = buf.length\n var sum = 0\n for (var i = len - 1; i > -1; i--) {\n var byte = Number(buf[i])\n if (byte !== 0) {\n sum += byte * Math.pow(256, len - i - 1)\n }\n }\n return sum\n}\n\nconst onesComp = (byte: number) => (0xff ^ byte) & 0xff\n\nconst twosComp = (byte: number) => ((0xff ^ byte) + 1) & 0xff\n"]}
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