molstar
Version:
A comprehensive macromolecular library.
52 lines • 2.35 kB
JavaScript
/**
* Copyright (c) 2018-2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
* @author David Sehnal <david.sehnal@gmail.com>
*/
import { defaults, noop } from '../../mol-util';
import { SimpleBuffer } from './simple-buffer';
export var FileHandle;
(function (FileHandle) {
function fromBuffer(buffer, name) {
return {
name: name,
readBuffer: function (position, sizeOrBuffer, size, byteOffset) {
var bytesRead;
var outBuffer;
if (typeof sizeOrBuffer === 'number') {
size = defaults(size, sizeOrBuffer);
var start = position;
var end = Math.min(buffer.length, start + size);
bytesRead = end - start;
outBuffer = SimpleBuffer.fromUint8Array(new Uint8Array(buffer.buffer, start, end - start));
}
else {
size = defaults(size, sizeOrBuffer.length);
var start = position;
var end = Math.min(buffer.length, start + size);
sizeOrBuffer.set(buffer.subarray(start, end), byteOffset);
bytesRead = end - start;
outBuffer = sizeOrBuffer;
}
if (size !== bytesRead) {
console.warn("byteCount " + size + " and bytesRead " + bytesRead + " differ");
}
return Promise.resolve({ bytesRead: bytesRead, buffer: outBuffer });
},
writeBuffer: function (position, buffer, length) {
length = defaults(length, buffer.length);
console.error('.writeBuffer not implemented for FileHandle.fromBuffer');
return Promise.resolve(0);
},
writeBufferSync: function (position, buffer, length) {
length = defaults(length, buffer.length);
console.error('.writeSync not implemented for FileHandle.fromBuffer');
return 0;
},
close: noop
};
}
FileHandle.fromBuffer = fromBuffer;
})(FileHandle || (FileHandle = {}));
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