79 lines
2.1 KiB
TypeScript
79 lines
2.1 KiB
TypeScript
export function assertUInt8(target: any, key: string) {
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return assertInteger(target, key, 0, 0xFF);
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}
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export function assertInt8(target: any, key: string) {
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return assertInteger(target, key, -0x80, 0x7F);
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}
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export function assertUInt16(target: any, key: string) {
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return assertInteger(target, key, 0, 0xFFFF);
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}
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export function assertInt16(target: any, key: string) {
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return assertInteger(target, key, -0x8000, 0x7FFF);
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}
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export function assertUInt32(target: any, key: string) {
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return assertInteger(target, key, 0, 0xFFFFFFFF);
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}
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export function assertInt32(target: any, key: string) {
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return assertInteger(target, key, -0x80000000, 0x7FFFFFFF);
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}
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export function assertCompactLength(target: any, key: string) {
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return assertUInt16(target, key);
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}
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function assertInteger(target: any, key: string, min: number, max: number) {
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const priv = '_' + key;
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function getter() {
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return this[priv];
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}
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function setter(newVal: any) {
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if (this[priv] !== newVal) {
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if (newVal < min || newVal > max) {
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throw `${target.constructor.name}.${key}: ` +
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`Integer ${newVal} is outside the valid [${min}, ${max}] interval`;
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}
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this[priv] = newVal;
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}
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}
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Object.defineProperty(target, key, {
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get: getter,
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set: setter,
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enumerable: true,
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configurable: true
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});
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}
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export function assertEnum<E>(enumerated: E) {
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return function(target: any, key: string) {
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const priv = '_' + key;
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function getter() {
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return this[priv];
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}
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function setter(newVal: any) {
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if (this[priv] !== newVal) {
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if (enumerated[newVal] === undefined) {
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throw `${target.constructor.name}.${key}: ${newVal} is not enum`;
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}
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this[priv] = newVal;
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}
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}
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Object.defineProperty(target, key, {
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get: getter,
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set: setter,
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enumerable: true,
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configurable: true
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});
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};
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}
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