node-fxplc/dist/esm/number-types.js

Node.js library for low-level Mitsubishi FX (MELSEC) PLC framed protocol communication

// number-types.js
// Definizione NumberType e conversioni Buffer
// number-types.js
// Numeric type identifiers and buffer conversion helpers.
/** Enumerates supported numeric data representations. */
export const NumberType = Object.freeze({
    WordSigned: 'WordSigned',
    DoubleWordSigned: 'DoubleWordSigned',
    WordUnsigned: 'WordUnsigned',
    DoubleWordUnsigned: 'DoubleWordUnsigned',
    Float: 'Float'
});
/**
 * Map of NumberType -> { size, read, write }
 * read/write operate little-endian per FX memory convention for this implementation.
 */
export const NumberTypeConverters = Object.freeze({
    [NumberType.WordSigned]: { size: 2, read: (b, o = 0) => b.readInt16LE(o), write: (b, o, v) => b.writeInt16LE(v, o) },
    [NumberType.DoubleWordSigned]: { size: 4, read: (b, o = 0) => b.readInt32LE(o), write: (b, o, v) => b.writeInt32LE(v, o) },
    [NumberType.WordUnsigned]: { size: 2, read: (b, o = 0) => b.readUInt16LE(o), write: (b, o, v) => b.writeUInt16LE(v, o) },
    [NumberType.DoubleWordUnsigned]: { size: 4, read: (b, o = 0) => b.readUInt32LE(o), write: (b, o, v) => b.writeUInt32LE(v, o) },
    [NumberType.Float]: { size: 4, read: (b, o = 0) => b.readFloatLE(o), write: (b, o, v) => b.writeFloatLE(v, o) }
});