const f32 = new Float32Array([-0])
const f8b = new Uint8Array(f32.buffer)

/**
 * Writes a 32 bit float to a buffer using little endian byte order
 */
export function writeFloatLE (val: number, buf: Uint8Array, pos: number): void {
  f32[0] = val
  buf[pos] = f8b[0]
  buf[pos + 1] = f8b[1]
  buf[pos + 2] = f8b[2]
  buf[pos + 3] = f8b[3]
}

/**
 * Writes a 32 bit float to a buffer using big endian byte order
 */
export function writeFloatBE (val: number, buf: Uint8Array, pos: number): void {
  f32[0] = val
  buf[pos] = f8b[3]
  buf[pos + 1] = f8b[2]
  buf[pos + 2] = f8b[1]
  buf[pos + 3] = f8b[0]
}

/**
 * Reads a 32 bit float from a buffer using little endian byte order
 */
export function readFloatLE (buf: Uint8Array, pos: number): number {
  f8b[0] = buf[pos]
  f8b[1] = buf[pos + 1]
  f8b[2] = buf[pos + 2]
  f8b[3] = buf[pos + 3]
  return f32[0]
}

/**
 * Reads a 32 bit float from a buffer using big endian byte order
 */
export function readFloatBE (buf: Uint8Array, pos: number): number {
  f8b[3] = buf[pos]
  f8b[2] = buf[pos + 1]
  f8b[1] = buf[pos + 2]
  f8b[0] = buf[pos + 3]
  return f32[0]
}

const f64 = new Float64Array([-0])
const d8b = new Uint8Array(f64.buffer)

/**
 * Writes a 64 bit double to a buffer using little endian byte order
 */
export function writeDoubleLE (val: number, buf: Uint8Array, pos: number): void {
  f64[0] = val
  buf[pos] = d8b[0]
  buf[pos + 1] = d8b[1]
  buf[pos + 2] = d8b[2]
  buf[pos + 3] = d8b[3]
  buf[pos + 4] = d8b[4]
  buf[pos + 5] = d8b[5]
  buf[pos + 6] = d8b[6]
  buf[pos + 7] = d8b[7]
}

/**
 * Writes a 64 bit double to a buffer using big endian byte order
 */
export function writeDoubleBE (val: number, buf: Uint8Array, pos: number): void {
  f64[0] = val
  buf[pos] = d8b[7]
  buf[pos + 1] = d8b[6]
  buf[pos + 2] = d8b[5]
  buf[pos + 3] = d8b[4]
  buf[pos + 4] = d8b[3]
  buf[pos + 5] = d8b[2]
  buf[pos + 6] = d8b[1]
  buf[pos + 7] = d8b[0]
}

/**
 * Reads a 64 bit double from a buffer using little endian byte order
 */
export function readDoubleLE (buf: Uint8Array, pos: number): number {
  d8b[0] = buf[pos]
  d8b[1] = buf[pos + 1]
  d8b[2] = buf[pos + 2]
  d8b[3] = buf[pos + 3]
  d8b[4] = buf[pos + 4]
  d8b[5] = buf[pos + 5]
  d8b[6] = buf[pos + 6]
  d8b[7] = buf[pos + 7]
  return f64[0]
}

/**
 * Reads a 64 bit double from a buffer using big endian byte order
 */
export function readDoubleBE (buf: Uint8Array, pos: number): number {
  d8b[7] = buf[pos]
  d8b[6] = buf[pos + 1]
  d8b[5] = buf[pos + 2]
  d8b[4] = buf[pos + 3]
  d8b[3] = buf[pos + 4]
  d8b[2] = buf[pos + 5]
  d8b[1] = buf[pos + 6]
  d8b[0] = buf[pos + 7]
  return f64[0]
}