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index.js
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/* @flow */
import hashInteger from "../../hash-functions/integer";
import type Backing from "backing";
import type {Realm} from "../..";
export function make ({PrimitiveType}: Realm): PrimitiveType<uint8> {
return new PrimitiveType({
name: 'Uint8',
byteAlignment: 1,
byteLength: 1,
cast (input: any): uint8 {
return input & 255;
},
accepts (input: any): boolean {
return typeof input === 'number' && !isNaN(input) && input >= 0 && input <= 255 && input === Math.floor(input);
},
store (backing: Backing, address: float64, value: number): void {
backing.setUint8(address, value);
},
load (backing: Backing, address: float64): uint8 {
return backing.getUint8(address);
},
emptyValue (): uint8 {
return 0;
},
randomValue (): uint8 {
return Math.floor(Math.random() * Math.pow(2, 8));
},
hashValue: hashInteger,
flowType () {
return `uint8`;
}
});
}