more serialization

src/lib/serial/chord.ts

@@ -57,97 +57,3 @@ export function deserializeActions(native: bigint): number[] {
 
   return actions
 }
-
-const CHL_VERSION = 1
-const CHL_MAGIC = "CHL"
-
-/**
- * Binary serialization of the chord library
- *
- * Layout is as follows:
- * ```rs
- * struct Chords {
- *   magic: "CHL"
- *   version: u8
- *   chordCount: u32
- *   chords: chord[]
- * }
- *
- * struct Chord {
- *   id: u32
- *   phrase: u128
- *   actionCount: u16
- *   actions: u8[]
- * }
- * ```
- * Serialized as little endian.
- *
- * @param chords
- */
-export function chordsToFile(chords: Chord[]): ArrayBuffer {
-  const actionsTotalCount = chords.reduce((size, chord) => size + chord.actions.length, 0)
-
-  const buffer = new ArrayBuffer(4 + 4 + chords.length * (4 + 16 + 2) + actionsTotalCount)
-  const view = new DataView(buffer)
-  let byteOffset = 0
-
-  for (const byte of CHL_MAGIC.split("")) {
-    view.setUint8(byteOffset++, byte.codePointAt(0)!)
-  }
-  view.setUint8(byteOffset++, CHL_VERSION)
-  view.setUint32(byteOffset, chords.length, true)
-  byteOffset += 4
-  for (const chord of chords) {
-    const actions = serializeActions(chord.actions)
-    view.setBigUint64(byteOffset, actions >> 64n, true)
-    byteOffset += 8
-    view.setBigUint64(byteOffset, actions & 0xffff_ffff_ffff_ffffn, true)
-    byteOffset += 8
-
-    view.setUint16(byteOffset, chord.phrase.length, true)
-    byteOffset += 2
-    for (const action of chord.phrase) {
-      view.setUint8(byteOffset++, action)
-    }
-  }
-
-  return buffer
-}
-
-/**
- * @see {chordsToFile}
- */
-export function chordsFromFile(buffer: ArrayBuffer): Chord[] {
-  const view = new DataView(buffer)
-  let byteOffset = 0
-
-  const magic = []
-  for (let i = 0; i < CHL_MAGIC.length; i++) {
-    magic.push(view.getUint8(byteOffset++))
-  }
-  const magicString = String.fromCodePoint(...magic)
-  if (magicString !== CHL_MAGIC) throw new Error(`Not a .chl file [magic ${magicString}]`)
-  if (view.getUint8(byteOffset++) !== CHL_VERSION) throw Error("Invalid .chl [version]")
-
-  const chords: Chord[] = Array.from({length: view.getUint32(byteOffset, true)})
-  byteOffset += 4
-  for (let i = 0; i < chords.length; i++) {
-    let actions = view.getBigUint64(byteOffset, true) << 64n
-    byteOffset += 8
-    actions |= view.getBigUint64(byteOffset, true)
-    byteOffset += 8
-
-    const phrase: number[] = Array.from({length: view.getUint16(byteOffset, true)})
-    byteOffset += 2
-    for (let i = 0; i < phrase.length; i++) {
-      phrase[i] = view.getUint8(byteOffset++)
-    }
-
-    chords[i] = {
-      actions: deserializeActions(actions),
-      phrase,
-    }
-  }
-
-  return chords
-}