source: imaps-frontend/node_modules/es-abstract/2024/IsViewOutOfBounds.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var IsDetachedBuffer = require('./IsDetachedBuffer');

var isDataViewWithBufferWitnessRecord = require('../helpers/records/data-view-with-buffer-witness-record');

var dataViewBuffer = require('data-view-buffer');
var dataViewByteLength = require('data-view-byte-length');
var dataViewByteOffset = require('data-view-byte-offset');

// https://262.ecma-international.org/15.0/#sec-isviewoutofbounds

module.exports = function IsViewOutOfBounds(viewRecord) {
        if (!isDataViewWithBufferWitnessRecord(viewRecord)) {
                throw new $TypeError('Assertion failed: `viewRecord` must be a DataView With Buffer Witness Record');
        }

        var view = viewRecord['[[Object]]']; // step 1

        var bufferByteLength = viewRecord['[[CachedBufferByteLength]]']; // step 2

        if (IsDetachedBuffer(dataViewBuffer(view)) !== (bufferByteLength === 'DETACHED')) {
                // step 3
                throw new $TypeError('Assertion failed: `IsDetachedBuffer(dataViewBuffer(view))` must be true if and only if `bufferByteLength === ~DETACHED~');
        }

        if (bufferByteLength === 'DETACHED') {
                return true; // step 4
        }

        var byteOffsetStart = dataViewByteOffset(view); // step 5

        var dvByteLength = dataViewByteLength(view);
        var byteOffsetEnd = dvByteLength === 'AUTO' ? bufferByteLength : byteOffsetStart + dvByteLength; // steps 6 - 7

        if (byteOffsetStart > bufferByteLength || byteOffsetEnd > bufferByteLength) {
                return true; // step 8
        }

        // 9. NOTE: 0-length DataViews are not considered out-of-bounds.

        return false; // step 10
};