pck is a binary format specifically designed for generating efficient serializers and deserializers in javascript.

Current Status

WORK IN PROGRESS

Packages

• pck Core data structures and helper functions for generating schemas.
• pck-emit-js Emitter for Javascript/TypeScript (Browser/Node).
• pck-emit-go Emitter for Go.
• pck-browser Helper utilities for Javascript (Browser).
• pck-node Helper utilities for Javascript (Node).

Features

• Javascript API for generating schemas (custom data query languages)
• Binary format
• Compact storage size
• Efficient serialization and deserialization in javascript
• Compact javascript serializers and deserializers that can immediately generate objects with appropriate types without any additional steps

Data Types

| Type | Storage Size | Description | | --- | --- | --- | | Bool | 1 bit (bit store) | Boolean | | I8 | 1 byte | Int8 | | U8 | 1 byte | Uint8 | | I16 | 2 bytes | Int16 | | U16 | 2 bytes | Uint16 | | I32 | 4 bytes | Int32 | | U32 | 4 bytes | Uint32 | | F32 | 4 bytes | Float32 | | F64 | 8 bytes | Float64 | | IVAR | 1-5 bytes | Variadic Int32 (ZigZag encoding) | | UVAR | 1-5 bytes | Variadic Uint32 | | UTF8 | 1-5+N bytes | UTF8 String | | ASCII | 1-5+N bytes | ASCII String | | BYTES | 1-5+N bytes | Byte Array | | ARRAY | 1-5+N bytes | Array | | MAP(K,V) | 1-5+(NK+NV) bytes | Map | | ASCII(N) | N bytes | Fixed ASCII String | | BYTES(N) | N bytes | Fixed Byte Array | | ARRAY(N) | NV bytes | Fixed Array | | REF(T) | size(T) bytes | Reference to an Object | | ONE_OF(T...) | 1-5+size(...T) bytes | One of Object types |

Object Structure

struct {
  // bitSet is used to store flags for optional fields and boolean values
  bitSet?: u8[N];
  // Data
  ...data;
}