| 1 | {"version":3,"file":"helpers.js","names":["Result","constructor","value","offset","exports","NotEnoughDataError","Error","byteCount","readUInt8","buf","length","readUInt16LE","readInt16LE","readUInt24LE","readUIntLE","readUInt32LE","readUInt32BE","readUInt40LE","readInt32LE","readBigUInt64LE","readBigInt64LE","readFloatLE","readDoubleLE","readBVarChar","charCount","byteLength","toString","readBVarByte","slice","readUsVarChar","readUsVarByte","readUNumeric64LE","low","high","readUNumeric96LE","dword1","dword2","dword3","readUNumeric128LE","dword4"],"sources":["../../src/token/helpers.ts"],"sourcesContent":["export class Result<T> {\n declare value: T;\n declare offset: number;\n\n constructor(value: T, offset: number) {\n this.value = value;\n this.offset = offset;\n }\n}\n\nexport class NotEnoughDataError extends Error {\n byteCount: number;\n\n constructor(byteCount: number) {\n super();\n\n this.byteCount = byteCount;\n }\n}\n\nexport function readUInt8(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 1) {\n throw new NotEnoughDataError(offset + 1);\n }\n\n return new Result(buf.readUInt8(offset), offset + 1);\n}\n\nexport function readUInt16LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 2) {\n throw new NotEnoughDataError(offset + 2);\n }\n\n return new Result(buf.readUInt16LE(offset), offset + 2);\n}\n\nexport function readInt16LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 2) {\n throw new NotEnoughDataError(offset + 2);\n }\n\n return new Result(buf.readInt16LE(offset), offset + 2);\n}\n\nexport function readUInt24LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 3) {\n throw new NotEnoughDataError(offset + 3);\n }\n\n return new Result(buf.readUIntLE(offset, 3), offset + 3);\n}\n\nexport function readUInt32LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 4) {\n throw new NotEnoughDataError(offset + 4);\n }\n\n return new Result(buf.readUInt32LE(offset), offset + 4);\n}\n\nexport function readUInt32BE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 4) {\n throw new NotEnoughDataError(offset + 4);\n }\n\n return new Result(buf.readUInt32BE(offset), offset + 4);\n}\n\nexport function readUInt40LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 5) {\n throw new NotEnoughDataError(offset + 5);\n }\n\n return new Result(buf.readUIntLE(offset, 5), offset + 5);\n}\nexport function readInt32LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 4) {\n throw new NotEnoughDataError(offset + 4);\n }\n\n return new Result(buf.readInt32LE(offset), offset + 4);\n}\n\nexport function readBigUInt64LE(buf: Buffer, offset: number): Result<bigint> {\n offset = +offset;\n\n if (buf.length < offset + 8) {\n throw new NotEnoughDataError(offset + 8);\n }\n\n return new Result(buf.readBigUInt64LE(offset), offset + 8);\n}\n\nexport function readBigInt64LE(buf: Buffer, offset: number): Result<bigint> {\n offset = +offset;\n\n if (buf.length < offset + 8) {\n throw new NotEnoughDataError(offset + 8);\n }\n\n return new Result(buf.readBigInt64LE(offset), offset + 8);\n}\n\nexport function readFloatLE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 4) {\n throw new NotEnoughDataError(offset + 4);\n }\n\n return new Result(buf.readFloatLE(offset), offset + 4);\n}\n\nexport function readDoubleLE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 8) {\n throw new NotEnoughDataError(offset + 8);\n }\n\n return new Result(buf.readDoubleLE(offset), offset + 8);\n}\n\nexport function readBVarChar(buf: Buffer, offset: number): Result<string> {\n offset = +offset;\n\n let charCount;\n ({ offset, value: charCount } = readUInt8(buf, offset));\n\n const byteLength = charCount * 2;\n\n if (buf.length < offset + byteLength) {\n throw new NotEnoughDataError(offset + byteLength);\n }\n\n return new Result(buf.toString('ucs2', offset, offset + byteLength), offset + byteLength);\n}\n\nexport function readBVarByte(buf: Buffer, offset: number): Result<Buffer> {\n offset = +offset;\n\n let byteLength;\n ({ offset, value: byteLength } = readUInt8(buf, offset));\n\n if (buf.length < offset + byteLength) {\n throw new NotEnoughDataError(offset + byteLength);\n }\n\n return new Result(buf.slice(offset, offset + byteLength), offset + byteLength);\n}\n\nexport function readUsVarChar(buf: Buffer, offset: number): Result<string> {\n offset = +offset;\n\n let charCount;\n ({ offset, value: charCount } = readUInt16LE(buf, offset));\n\n const byteLength = charCount * 2;\n\n if (buf.length < offset + byteLength) {\n throw new NotEnoughDataError(offset + byteLength);\n }\n\n return new Result(buf.toString('ucs2', offset, offset + byteLength), offset + byteLength);\n}\n\nexport function readUsVarByte(buf: Buffer, offset: number): Result<Buffer> {\n offset = +offset;\n\n let byteLength;\n ({ offset, value: byteLength } = readUInt16LE(buf, offset));\n\n if (buf.length < offset + byteLength) {\n throw new NotEnoughDataError(offset + byteLength);\n }\n\n return new Result(buf.slice(offset, offset + byteLength), offset + byteLength);\n}\n\nexport function readUNumeric64LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 8) {\n throw new NotEnoughDataError(offset + 8);\n }\n\n const low = buf.readUInt32LE(offset);\n const high = buf.readUInt32LE(offset + 4);\n\n return new Result((0x100000000 * high) + low, offset + 8);\n}\n\nexport function readUNumeric96LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 12) {\n throw new NotEnoughDataError(offset + 12);\n }\n\n const dword1 = buf.readUInt32LE(offset);\n const dword2 = buf.readUInt32LE(offset + 4);\n const dword3 = buf.readUInt32LE(offset + 8);\n\n return new Result(dword1 + (0x100000000 * dword2) + (0x100000000 * 0x100000000 * dword3), offset + 12);\n}\n\nexport function readUNumeric128LE(buf: Buffer, offset: number): Result<number> {\n offset = +offset;\n\n if (buf.length < offset + 16) {\n throw new NotEnoughDataError(offset + 16);\n }\n\n const dword1 = buf.readUInt32LE(offset);\n const dword2 = buf.readUInt32LE(offset + 4);\n const dword3 = buf.readUInt32LE(offset + 8);\n const dword4 = buf.readUInt32LE(offset + 12);\n\n return new Result(dword1 + (0x100000000 * dword2) + (0x100000000 * 0x100000000 * dword3) + (0x100000000 * 0x100000000 * 0x100000000 * dword4), offset + 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