41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
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import {
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Token,
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Type
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} from './token.js';
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import * as uint from './0uint.js';
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import { decodeErrPrefix } from './common.js';
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function toToken(_data, _pos, prefix, length) {
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return new Token(Type.array, length, prefix);
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}
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export function decodeArrayCompact(data, pos, minor, _options) {
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return toToken(data, pos, 1, minor);
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}
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export function decodeArray8(data, pos, _minor, options) {
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return toToken(data, pos, 2, uint.readUint8(data, pos + 1, options));
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}
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export function decodeArray16(data, pos, _minor, options) {
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return toToken(data, pos, 3, uint.readUint16(data, pos + 1, options));
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}
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export function decodeArray32(data, pos, _minor, options) {
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return toToken(data, pos, 5, uint.readUint32(data, pos + 1, options));
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}
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export function decodeArray64(data, pos, _minor, options) {
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const l = uint.readUint64(data, pos + 1, options);
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if (typeof l === 'bigint') {
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throw new Error(`${ decodeErrPrefix } 64-bit integer array lengths not supported`);
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}
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return toToken(data, pos, 9, l);
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}
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export function decodeArrayIndefinite(data, pos, _minor, options) {
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if (options.allowIndefinite === false) {
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throw new Error(`${ decodeErrPrefix } indefinite length items not allowed`);
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}
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return toToken(data, pos, 1, Infinity);
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}
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export function encodeArray(buf, token) {
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uint.encodeUintValue(buf, Type.array.majorEncoded, token.value);
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}
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encodeArray.compareTokens = uint.encodeUint.compareTokens;
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encodeArray.encodedSize = function encodedSize(token) {
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return uint.encodeUintValue.encodedSize(token.value);
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};
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