126 lines
3.5 KiB
Plaintext
126 lines
3.5 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 table60Sizes = {
|
||
__proto__: null,
|
||
$Int8Array: 1,
|
||
$Uint8Array: 1,
|
||
$Uint8ClampedArray: 1,
|
||
$Int16Array: 2,
|
||
$Uint16Array: 2,
|
||
$Int32Array: 4,
|
||
$Uint32Array: 4,
|
||
$BigInt64Array: 8,
|
||
$BigUint64Array: 8,
|
||
$Float32Array: 4,
|
||
$Float64Array: 8
|
||
};
|
||
|
||
var table60Types = {
|
||
__proto__: null,
|
||
$Int8Array: 'Int8',
|
||
$Uint8Array: 'Uint8',
|
||
$Uint8ClampedArray: 'Uint8C',
|
||
$Int16Array: 'Int16',
|
||
$Uint16Array: 'Uint16',
|
||
$Int32Array: 'Int32',
|
||
$Uint32Array: 'Uint32',
|
||
$BigInt64Array: 'BigInt64',
|
||
$BigUint64Array: 'BigUint64',
|
||
$Float32Array: 'Float32',
|
||
$Float64Array: 'Float64'
|
||
};
|
||
|
||
// https://262.ecma-international.org/12.0/#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'); // step 1
|
||
}
|
||
|
||
var targetBuffer = typedArrayBuffer(target); // step 2
|
||
|
||
if (IsDetachedBuffer(targetBuffer)) {
|
||
throw new $TypeError('target’s buffer is detached'); // step 3
|
||
}
|
||
|
||
var targetLength = typedArrayLength(target); // step 4
|
||
|
||
var targetName = whichTarget; // step 5
|
||
|
||
var targetElementSize = table60Sizes['$' + targetName]; // step 6
|
||
|
||
var targetType = table60Types['$' + targetName]; // step 7
|
||
|
||
var targetByteOffset = typedArrayByteOffset(target); // step 8
|
||
|
||
var src = ToObject(source); // step 9
|
||
|
||
var srcLength = LengthOfArrayLike(src); // step 10
|
||
|
||
if (targetOffset === Infinity) {
|
||
throw new $RangeError('targetOffset must be a finite integer'); // step 11
|
||
}
|
||
|
||
if (srcLength + targetOffset > targetLength) {
|
||
throw new $RangeError('targetOffset + srcLength must be <= target.length'); // step 12
|
||
}
|
||
|
||
var targetByteIndex = (targetOffset * targetElementSize) + targetByteOffset; // step 13
|
||
|
||
var k = 0; // step 14
|
||
|
||
var limit = targetByteIndex + (targetElementSize * srcLength); // step 15
|
||
|
||
while (targetByteIndex < limit) { // step 16
|
||
var Pk = ToString(k); // step 16.a
|
||
|
||
var value = Get(src, Pk); // step 16.b
|
||
|
||
if (IsBigIntElementType(targetType)) {
|
||
value = ToBigInt(value); // step 16.c
|
||
} else {
|
||
value = ToNumber(value); // step 16.d
|
||
}
|
||
|
||
if (IsDetachedBuffer(targetBuffer)) {
|
||
throw new $TypeError('target’s buffer is detached'); // step 16.e
|
||
}
|
||
|
||
SetValueInBuffer(targetBuffer, targetByteIndex, targetType, value, true, 'Unordered'); // step 16.f
|
||
|
||
k += 1; // step 16.g
|
||
|
||
targetByteIndex += targetElementSize; // step 16.h
|
||
}
|
||
};
|