27 lines
922 B
JavaScript
27 lines
922 B
JavaScript
export function assertEmptyRest(rest) {
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if (Object.keys(rest).length > 0) throw new TypeError('Unexpected extra options')
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}
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// eslint-disable-next-line sonarjs/no-nested-template-literals
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const makeMessage = (name, extra) => `Expected${name ? ` ${name} to be` : ''} an Uint8Array${extra}`
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const TypedArray = Object.getPrototypeOf(Uint8Array)
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export function assertTypedArray(arr) {
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if (arr instanceof TypedArray) return
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throw new TypeError('Expected a TypedArray instance')
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}
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export function assertUint8(arr, options) {
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if (!options) {
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// fast path
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if (arr instanceof Uint8Array) return
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throw new TypeError('Expected an Uint8Array')
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}
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const { name, length, ...rest } = options
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assertEmptyRest(rest)
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if (arr instanceof Uint8Array && (length === undefined || arr.length === length)) return
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throw new TypeError(makeMessage(name, length === undefined ? '' : ` of size ${Number(length)}`))
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}
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