Brunobkr/llama.cpp_AlgMor24_github

1'use strict';2 3var GetIntrinsic = require('get-intrinsic');4 5var min = require('math-intrinsics/min');6var $TypeError = require('es-errors/type');7var $ArrayBuffer = GetIntrinsic('%ArrayBuffer%', true);8var $Uint8Array = GetIntrinsic('%Uint8Array%', true);9 10var callBound = require('call-bound');11 12var byteLength = require('array-buffer-byte-length');13var $maxByteLength = callBound('%ArrayBuffer.prototype.maxByteLength%', true);14var copy = function copyAB(src, start, end) {15	var that = new $Uint8Array(src);16	if (typeof end === 'undefined') {17		end = that.length; // eslint-disable-line no-param-reassign18	}19	var result = new $ArrayBuffer(end - start);20	var resultArray = new $Uint8Array(result);21	for (var i = 0; i < resultArray.length; i++) {22		resultArray[i] = that[i + start];23	}24	return result;25};26var $abSlice = callBound('%ArrayBuffer.prototype.slice%', true)27	|| function slice(ab, a, b) { // in node < 0.11, slice is an own nonconfigurable property28		return ab.slice ? ab.slice(a, b) : copy(ab, a, b); // node 0.8 lacks `slice`29	};30 31var DetachArrayBuffer = require('./DetachArrayBuffer');32var IsDetachedBuffer = require('./IsDetachedBuffer');33var IsFixedLengthArrayBuffer = require('./IsFixedLengthArrayBuffer');34var ToIndex = require('./ToIndex');35 36var isArrayBuffer = require('is-array-buffer');37var isSharedArrayBuffer = require('is-shared-array-buffer');38 39// https://262.ecma-international.org/15.0/#sec-arraybuffercopyanddetach40 41module.exports = function ArrayBufferCopyAndDetach(arrayBuffer, newLength, preserveResizability) {42	if (preserveResizability !== 'PRESERVE-RESIZABILITY' && preserveResizability !== 'FIXED-LENGTH') {43		throw new $TypeError('`preserveResizability` must be ~PRESERVE-RESIZABILITY~ or ~FIXED-LENGTH~');44	}45 46	if (!isArrayBuffer(arrayBuffer) || isSharedArrayBuffer(arrayBuffer)) {47		throw new $TypeError('`arrayBuffer` must be a non-shared ArrayBuffer'); // steps 1 - 248	}49 50	var abByteLength;51 52	var newByteLength;53	if (typeof newLength === 'undefined') { // step 354		newByteLength = byteLength(arrayBuffer); // step 3.a55		abByteLength = newByteLength;56	} else { // step 457		newByteLength = ToIndex(newLength); // step 4.a58	}59 60	if (IsDetachedBuffer(arrayBuffer)) {61		throw new $TypeError('`arrayBuffer` must not be detached'); // step 562	}63 64	var newMaxByteLength;65	if (preserveResizability === 'PRESERVE-RESIZABILITY' && !IsFixedLengthArrayBuffer(arrayBuffer)) { // step 666		newMaxByteLength = $maxByteLength(arrayBuffer); // step 6.a67	} else { // step 768		newMaxByteLength = 'EMPTY'; // step 7.a69	}70 71	// commented out since there's no way to set or access this key72 73	// 8. If arrayBuffer.[[ArrayBufferDetachKey]] is not undefined, throw a TypeError exception.74 75	// 9. Let newBuffer be ? AllocateArrayBuffer(%ArrayBuffer%, newByteLength, newMaxByteLength).76	var newBuffer = newMaxByteLength === 'EMPTY' ? new $ArrayBuffer(newByteLength) : new $ArrayBuffer(newByteLength, { maxByteLength: newMaxByteLength });77 78	if (typeof abByteLength !== 'number') {79		abByteLength = byteLength(arrayBuffer);80	}81	var copyLength = min(newByteLength, abByteLength); // step 1082	if (newByteLength > copyLength || newMaxByteLength !== 'EMPTY') {83		var taNew = new $Uint8Array(newBuffer);84		var taOld = new $Uint8Array(arrayBuffer);85		for (var i = 0; i < copyLength; i++) {86			taNew[i] = taOld[i];87		}88	} else {89		newBuffer = $abSlice(arrayBuffer, 0, copyLength); // ? optimization for when the new buffer will not be larger than the old one90	}91	/*92	11. Let fromBlock be arrayBuffer.[[ArrayBufferData]].93	12. Let toBlock be newBuffer.[[ArrayBufferData]].94	13. Perform CopyDataBlockBytes(toBlock, 0, fromBlock, 0, copyLength).95	14. NOTE: Neither creation of the new Data Block nor copying from the old Data Block are observable. Implementations may implement this method as a zero-copy move or a realloc.96	*/97 98	DetachArrayBuffer(arrayBuffer); // step 1599 100	return newBuffer; // step 16101};102