molstar
Version:
A comprehensive macromolecular library.
67 lines (66 loc) • 1.97 kB
JavaScript
;
/**
* Copyright (c) 2018 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* Taken/adapted from DensityServer (https://github.com/dsehnal/DensityServer)
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.openRead = openRead;
exports.exists = exists;
exports.createFile = createFile;
exports.writeInt = writeInt;
const tslib_1 = require("tslib");
const fs = tslib_1.__importStar(require("fs"));
const path = tslib_1.__importStar(require("path"));
const simple_buffer_1 = require("../../../mol-io/common/simple-buffer");
async function openRead(filename) {
return new Promise((res, rej) => {
fs.open(filename, 'r', async (err, file) => {
if (err) {
rej(err);
return;
}
try {
res(file);
}
catch (e) {
fs.closeSync(file);
}
});
});
}
function makeDir(path, root) {
const dirs = path.split(/\/|\\/g), dir = dirs.shift();
root = (root || '') + dir + '/';
try {
fs.mkdirSync(root);
}
catch (e) {
if (!fs.statSync(root).isDirectory())
throw new Error(e);
}
return !dirs.length || makeDir(dirs.join('/'), root);
}
function exists(filename) {
return fs.existsSync(filename);
}
function createFile(filename) {
return new Promise((res, rej) => {
if (fs.existsSync(filename))
fs.unlinkSync(filename);
makeDir(path.dirname(filename));
fs.open(filename, 'w', (err, file) => {
if (err)
rej(err);
else
res(file);
});
});
}
const smallBuffer = simple_buffer_1.SimpleBuffer.fromBuffer(Buffer.alloc(8));
async function writeInt(file, value, position) {
smallBuffer.writeInt32LE(value, 0);
await file.writeBuffer(position, smallBuffer, 4);
}