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import * as errors from '../internal/errors';
import { Buffer } from '../internal/buffer';
import { TEncodingExtended } from '../encoding';
import { bufferFrom } from '../internal/buffer';
import queueMicrotask from '../queueMicrotask';
import { Readable } from 'stream';
import { dataToBuffer, validateFd } from '../core/util';
import type { FsCallbackApi } from './types';
import type * as misc from './types/misc';
export function promisify(
fs: FsCallbackApi,
fn: string,
getResult: (result: any) => any = input => input,
): (...args) => Promise<any> {
return (...args) =>
new Promise((resolve, reject) => {
fs[fn].bind(fs)(...args, (error, result) => {
if (error) return reject(error);
return resolve(getResult(result));
});
});
}
export function validateCallback<T>(callback: T): misc.AssertCallback<T> {
if (typeof callback !== 'function') throw TypeError(ERRSTR.CB);
return callback as misc.AssertCallback<T>;
}
function _modeToNumber(mode: misc.TMode | undefined, def?): number | undefined {
if (typeof mode === 'number') return mode;
if (typeof mode === 'string') return parseInt(mode, 8);
Iif (def) return modeToNumber(def);
return undefined;
}
export function modeToNumber(mode: misc.TMode | undefined, def?): number {
const result = _modeToNumber(mode, def);
if (typeof result !== 'number' || isNaN(result)) throw new TypeError(ERRSTR.MODE_INT);
return result;
}
export function nullCheck(path, callback?) {
if (('' + path).indexOf('\u0000') !== -1) {
const er = new Error('Path must be a string without null bytes');
(er as any).code = 'ENOENT';
if (typeof callback !== 'function') throw er;
queueMicrotask(() => {
callback(er);
});
return false;
}
return true;
}
function getPathFromURLPosix(url): string {
Iif (url.hostname !== '') {
throw new errors.TypeError('ERR_INVALID_FILE_URL_HOST', process.platform);
}
const pathname = url.pathname;
for (let n = 0; n < pathname.length; n++) {
Iif (pathname[n] === '%') {
const third = pathname.codePointAt(n + 2) | 0x20;
Iif (pathname[n + 1] === '2' && third === 102) {
throw new errors.TypeError('ERR_INVALID_FILE_URL_PATH', 'must not include encoded / characters');
}
}
}
return decodeURIComponent(pathname);
}
export function pathToFilename(path: misc.PathLike): string {
if (path instanceof Uint8Array) {
path = bufferFrom(path);
}
if (typeof path !== 'string' && !Buffer.isBuffer(path)) {
try {
if (!(path instanceof require('url').URL)) throw new TypeError(ERRSTR.PATH_STR);
} catch (err) {
throw new TypeError(ERRSTR.PATH_STR);
}
path = getPathFromURLPosix(path);
}
const pathString = String(path);
nullCheck(pathString);
// return slash(pathString);
return pathString;
}
const ENOENT = 'ENOENT';
const EBADF = 'EBADF';
const EINVAL = 'EINVAL';
const EPERM = 'EPERM';
const EPROTO = 'EPROTO';
const EEXIST = 'EEXIST';
const ENOTDIR = 'ENOTDIR';
const EMFILE = 'EMFILE';
const EACCES = 'EACCES';
const EISDIR = 'EISDIR';
const ENOTEMPTY = 'ENOTEMPTY';
const ENOSYS = 'ENOSYS';
const ERR_FS_EISDIR = 'ERR_FS_EISDIR';
const ERR_OUT_OF_RANGE = 'ERR_OUT_OF_RANGE';
function formatError(errorCode: string, func = '', path = '', path2 = '') {
let pathFormatted = '';
if (path) pathFormatted = ` '${path}'`;
if (path2) pathFormatted += ` -> '${path2}'`;
switch (errorCode) {
case ENOENT:
return `ENOENT: no such file or directory, ${func}${pathFormatted}`;
case EBADF:
return `EBADF: bad file descriptor, ${func}${pathFormatted}`;
case EINVAL:
return `EINVAL: invalid argument, ${func}${pathFormatted}`;
case EPERM:
return `EPERM: operation not permitted, ${func}${pathFormatted}`;
case EPROTO:
return `EPROTO: protocol error, ${func}${pathFormatted}`;
case EEXIST:
return `EEXIST: file already exists, ${func}${pathFormatted}`;
case ENOTDIR:
return `ENOTDIR: not a directory, ${func}${pathFormatted}`;
case EISDIR:
return `EISDIR: illegal operation on a directory, ${func}${pathFormatted}`;
case EACCES:
return `EACCES: permission denied, ${func}${pathFormatted}`;
case ENOTEMPTY:
return `ENOTEMPTY: directory not empty, ${func}${pathFormatted}`;
case EMFILE:
return `EMFILE: too many open files, ${func}${pathFormatted}`;
case ENOSYS:
return `ENOSYS: function not implemented, ${func}${pathFormatted}`;
case ERR_FS_EISDIR:
return `[ERR_FS_EISDIR]: Path is a directory: ${func} returned EISDIR (is a directory) ${path}`;
case ERR_OUT_OF_RANGE:
return `[ERR_OUT_OF_RANGE]: value out of range, ${func}${pathFormatted}`;
default:
return `${errorCode}: error occurred, ${func}${pathFormatted}`;
}
}
export function createError(errorCode: string, func = '', path = '', path2 = '', Constructor = Error) {
const error = new Constructor(formatError(errorCode, func, path, path2));
(error as any).code = errorCode;
if (path) {
(error as any).path = path;
}
return error;
}
export function genRndStr6(): string {
return Math.random().toString(36).slice(2, 8).padEnd(6, '0');
}
export function flagsToNumber(flags: misc.TFlags | undefined): number {
if (typeof flags === 'number') return flags;
if (typeof flags === 'string') {
const flagsNum = FLAGS[flags];
if (typeof flagsNum !== 'undefined') return flagsNum;
}
// throw new TypeError(formatError(ERRSTR_FLAG(flags)));
throw new errors.TypeError('ERR_INVALID_OPT_VALUE', 'flags', flags);
}
export function streamToBuffer(stream: Readable) {
const chunks: any[] = [];
return new Promise<Buffer>((resolve, reject) => {
stream.on('data', chunk => chunks.push(chunk));
stream.on('end', () => resolve(Buffer.concat(chunks)));
stream.on('error', reject);
});
}
export const bufToUint8 = (buf: Buffer): Uint8Array => new Uint8Array(buf.buffer, buf.byteOffset, buf.byteLength);
export const getWriteArgs = (
fd: number,
a?: unknown,
b?: unknown,
c?: unknown,
d?: unknown,
e?: unknown,
): [
fd: number,
dataAsStr: boolean,
buf: Buffer,
offset: number,
length: number,
position: number | null,
callback: (...args) => void,
] => {
validateFd(fd);
let offset: number = 0;
let length: number | undefined;
let position: number | null = null;
let encoding: BufferEncoding | undefined;
let callback: ((...args) => void) | undefined;
const tipa = typeof a;
const tipb = typeof b;
const tipc = typeof c;
const tipd = typeof d;
if (tipa !== 'string') {
if (tipb === 'function') {
callback = <(...args) => void>b;
} else Iif (tipc === 'function') {
offset = (<number>b) | 0;
callback = <(...args) => void>c;
} else Iif (tipd === 'function') {
offset = (<number>b) | 0;
length = <number>c;
callback = <(...args) => void>d;
} else {
offset = (<number>b) | 0;
length = <number>c;
position = <number | null>d;
callback = <(...args) => void>e;
}
} else {
if (tipb === 'function') {
callback = <(...args) => void>b;
} else Iif (tipc === 'function') {
position = <number | null>b;
callback = <(...args) => void>c;
} else if (tipd === 'function') {
position = <number | null>b;
encoding = <BufferEncoding>c;
callback = <(...args) => void>d;
}
}
const buf: Buffer = dataToBuffer(<string | Buffer>a, encoding);
if (tipa !== 'string') {
if (typeof length === 'undefined') length = buf.length;
} else {
offset = 0;
length = buf.length;
}
const cb = validateCallback(callback);
return [fd, tipa === 'string', buf, offset, length!, position, cb];
};
export const getWriteSyncArgs = (
fd: number,
a: string | Buffer | ArrayBufferView | DataView,
b?: number,
c?: number | BufferEncoding,
d?: number | null,
): [fd: number, buf: Buffer, offset: number, length?: number, position?: number | null] => {
validateFd(fd);
let encoding: BufferEncoding | undefined;
let offset: number | undefined;
let length: number | undefined;
let position: number | null | undefined;
const isBuffer = typeof a !== 'string';
if (isBuffer) {
offset = (b || 0) | 0;
length = c as number;
position = d;
} else {
position = b;
encoding = c as BufferEncoding;
}
const buf: Buffer = dataToBuffer(a, encoding);
if (isBuffer) {
if (typeof length === 'undefined') {
length = buf.length;
}
} else {
offset = 0;
length = buf.length;
}
return [fd, buf, offset || 0, length, position];
};
export function bufferToEncoding(buffer: Buffer, encoding?: TEncodingExtended): misc.TDataOut {
if (!encoding || encoding === 'buffer') return buffer;
else return buffer.toString(encoding);
}
export function isReadableStream(stream): stream is Readable {
return (
stream !== null &&
typeof stream === 'object' &&
typeof stream.pipe === 'function' &&
typeof stream.on === 'function' &&
stream.readable === true
);
}
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