apple2js/js/formats/block.ts
2021-12-21 12:35:26 -08:00

30 lines
721 B
TypeScript

import { DiskOptions, BlockDisk, ENCODING_BLOCK } from './types';
/**
* Returns a `Disk` object for a block volume with block-ordered data.
* @param options the disk image and options
*/
export default function createBlockDisk(options: DiskOptions): BlockDisk {
const { rawData, readOnly, name } = options;
if (!rawData) {
throw new Error('Requires rawData');
}
const blocks = [];
let offset = 0;
while (offset < rawData.byteLength) {
blocks.push(new Uint8Array(rawData.slice(offset, offset + 0x200)));
offset += 0x200;
}
const disk: BlockDisk = {
encoding: ENCODING_BLOCK,
blocks,
name,
readOnly,
};
return disk;
}