Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | 1x 34x 34x 34x 34x 34x 34x 34x 5x 5x 5x 5x 5x 5x 5x | import { FLAG_CON } from '../consts/FLAG';
import type * as fsa from '../fsa/types';
import type * as misc from '../node/types/misc';
/**
* Represents an open file. Stores additional metadata about the open file, such
* as the seek position.
*/
export class FsaNodeFsOpenFile {
protected seek: number = 0;
/**
* This influences the behavior of the next write operation. On the first
* write we want to overwrite the file or keep the existing data, depending
* with which flags the file was opened. On subsequent writes we want to
* append to the file.
*/
protected keepExistingData: boolean;
public constructor(
public readonly fd: number,
public readonly createMode: misc.TMode,
public readonly flags: number,
public readonly file: fsa.IFileSystemFileHandle,
public readonly filename: string,
) {
this.keepExistingData = !!(flags & FLAG_CON.O_APPEND);
}
public async close(): Promise<void> {}
public async write(data: ArrayBufferView, seek: number | null): Promise<void> {
if (typeof seek !== 'number') seek = this.seek;
else Ethis.keepExistingData = true;
const keepExistingData = this.keepExistingData;
const writer = await this.file.createWritable({ keepExistingData });
await writer.write({
type: 'write',
data,
position: seek,
});
await writer.close();
this.keepExistingData = true;
this.seek += data.byteLength;
}
}
|