78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
import {DecodeStream} from './DecodeStream.js';
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import {Base} from './Base.js';
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class NumberT extends Base {
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constructor(type, endian = 'BE') {
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super();
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this.type = type;
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this.endian = endian;
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this.fn = this.type;
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if (this.type[this.type.length - 1] !== '8') {
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this.fn += this.endian;
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}
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}
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size() {
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return DecodeStream.TYPES[this.type];
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}
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decode(stream) {
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return stream[`read${this.fn}`]();
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}
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encode(stream, val) {
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return stream[`write${this.fn}`](val);
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}
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}
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export {NumberT as Number};
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export const uint8 = new NumberT('UInt8');
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export const uint16be = new NumberT('UInt16', 'BE');
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export const uint16 = uint16be;
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export const uint16le = new NumberT('UInt16', 'LE');
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export const uint24be = new NumberT('UInt24', 'BE');
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export const uint24 = uint24be;
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export const uint24le = new NumberT('UInt24', 'LE');
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export const uint32be = new NumberT('UInt32', 'BE');
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export const uint32 = uint32be;
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export const uint32le = new NumberT('UInt32', 'LE');
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export const int8 = new NumberT('Int8');
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export const int16be = new NumberT('Int16', 'BE');
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export const int16 = int16be;
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export const int16le = new NumberT('Int16', 'LE');
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export const int24be = new NumberT('Int24', 'BE');
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export const int24 = int24be;
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export const int24le = new NumberT('Int24', 'LE');
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export const int32be = new NumberT('Int32', 'BE');
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export const int32 = int32be;
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export const int32le = new NumberT('Int32', 'LE');
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export const floatbe = new NumberT('Float', 'BE');
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export const float = floatbe;
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export const floatle = new NumberT('Float', 'LE');
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export const doublebe = new NumberT('Double', 'BE');
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export const double = doublebe;
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export const doublele = new NumberT('Double', 'LE');
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export class Fixed extends NumberT {
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constructor(size, endian, fracBits = size >> 1) {
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super(`Int${size}`, endian);
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this._point = 1 << fracBits;
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}
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decode(stream) {
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return super.decode(stream) / this._point;
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}
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encode(stream, val) {
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return super.encode(stream, (val * this._point) | 0);
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}
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}
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export const fixed16be = new Fixed(16, 'BE');
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export const fixed16 = fixed16be;
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export const fixed16le = new Fixed(16, 'LE');
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export const fixed32be = new Fixed(32, 'BE');
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export const fixed32 = fixed32be;
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export const fixed32le = new Fixed(32, 'LE');
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