96 lines
3.0 KiB
Plaintext
96 lines
3.0 KiB
Plaintext
|
'use strict';
|
|||
|
|
|
|||
|
|
var $RangeError = require('es-errors/range');
|
|||
|
|
var $TypeError = require('es-errors/type');
|
|||
|
|
|
|||
|
|
var isTypedArray = require('is-typed-array');
|
|||
|
|
var typedArrayBuffer = require('typed-array-buffer');
|
|||
|
|
var typedArrayByteOffset = require('typed-array-byte-offset');
|
|||
|
|
var typedArrayLength = require('typed-array-length');
|
|||
|
|
var whichTypedArray = require('which-typed-array');
|
|||
|
|
|
|||
|
|
var isInteger = require('../helpers/isInteger');
|
|||
|
|
|
|||
|
|
var Get = require('./Get');
|
|||
|
|
var IsBigIntElementType = require('./IsBigIntElementType');
|
|||
|
|
var IsDetachedBuffer = require('./IsDetachedBuffer');
|
|||
|
|
var LengthOfArrayLike = require('./LengthOfArrayLike');
|
|||
|
|
var SetValueInBuffer = require('./SetValueInBuffer');
|
|||
|
|
var ToBigInt = require('./ToBigInt');
|
|||
|
|
var ToNumber = require('./ToNumber');
|
|||
|
|
var ToObject = require('./ToObject');
|
|||
|
|
var ToString = require('./ToString');
|
|||
|
|
var TypedArrayElementSize = require('./TypedArrayElementSize');
|
|||
|
|
var TypedArrayElementType = require('./TypedArrayElementType');
|
|||
|
|
|
|||
|
|
// https://262.ecma-international.org/13.0/#sec-settypedarrayfromarraylike
|
|||
|
|
|
|||
|
|
module.exports = function SetTypedArrayFromArrayLike(target, targetOffset, source) {
|
|||
|
|
var whichTarget = whichTypedArray(target);
|
|||
|
|
if (!whichTarget) {
|
|||
|
|
throw new $TypeError('Assertion failed: target must be a TypedArray instance');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (targetOffset !== Infinity && (!isInteger(targetOffset) || targetOffset < 0)) {
|
|||
|
|
throw new $TypeError('Assertion failed: targetOffset must be a non-negative integer or +Infinity');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (isTypedArray(source)) {
|
|||
|
|
throw new $TypeError('Assertion failed: source must not be a TypedArray instance');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var targetBuffer = typedArrayBuffer(target); // step 1
|
|||
|
|
|
|||
|
|
if (IsDetachedBuffer(targetBuffer)) {
|
|||
|
|
throw new $TypeError('target’s buffer is detached'); // step 2
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var targetLength = typedArrayLength(target); // step 3
|
|||
|
|
|
|||
|
|
var targetElementSize = TypedArrayElementSize(target); // step 4
|
|||
|
|
|
|||
|
|
var targetType = TypedArrayElementType(target); // step 5
|
|||
|
|
|
|||
|
|
var targetByteOffset = typedArrayByteOffset(target); // step 6
|
|||
|
|
|
|||
|
|
var src = ToObject(source); // step 7
|
|||
|
|
|
|||
|
|
var srcLength = LengthOfArrayLike(src); // step 8
|
|||
|
|
|
|||
|
|
if (targetOffset === Infinity) {
|
|||
|
|
throw new $RangeError('targetOffset must be a finite integer'); // step 9
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (srcLength + targetOffset > targetLength) {
|
|||
|
|
throw new $RangeError('targetOffset + srcLength must be <= target.length'); // step 10
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var targetByteIndex = (targetOffset * targetElementSize) + targetByteOffset; // step 11
|
|||
|
|
|
|||
|
|
var k = 0; // step 12
|
|||
|
|
|
|||
|
|
var limit = targetByteIndex + (targetElementSize * srcLength); // step 13
|
|||
|
|
|
|||
|
|
while (targetByteIndex < limit) { // step 14
|
|||
|
|
var Pk = ToString(k); // step 14.a
|
|||
|
|
|
|||
|
|
var value = Get(src, Pk); // step 14.b
|
|||
|
|
|
|||
|
|
if (IsBigIntElementType(targetType)) {
|
|||
|
|
value = ToBigInt(value); // step 14.c
|
|||
|
|
} else {
|
|||
|
|
value = ToNumber(value); // step 14.d
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (IsDetachedBuffer(targetBuffer)) {
|
|||
|
|
throw new $TypeError('target’s buffer is detached'); // step 14.e
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
SetValueInBuffer(targetBuffer, targetByteIndex, targetType, value, true, 'Unordered'); // step 14.f
|
|||
|
|
|
|||
|
|
k += 1; // step 14.g
|
|||
|
|
|
|||
|
|
targetByteIndex += targetElementSize; // step 14.h
|
|||
|
|
}
|
|||
|
|
};
|