/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.StringStream = exports.Stream = exports.NullStream = void 0;
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var _base_stream = require("./base_stream.js");
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var _util = require("../shared/util.js");
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class Stream extends _base_stream.BaseStream {
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constructor(arrayBuffer, start, length, dict) {
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super();
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this.bytes = arrayBuffer instanceof Uint8Array ? arrayBuffer : new Uint8Array(arrayBuffer);
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this.start = start || 0;
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this.pos = this.start;
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this.end = start + length || this.bytes.length;
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this.dict = dict;
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}
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get length() {
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return this.end - this.start;
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}
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get isEmpty() {
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return this.length === 0;
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}
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getByte() {
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if (this.pos >= this.end) {
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return -1;
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}
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return this.bytes[this.pos++];
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}
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getBytes(length) {
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const bytes = this.bytes;
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const pos = this.pos;
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const strEnd = this.end;
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if (!length) {
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return bytes.subarray(pos, strEnd);
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}
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let end = pos + length;
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if (end > strEnd) {
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end = strEnd;
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}
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this.pos = end;
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return bytes.subarray(pos, end);
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}
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getByteRange(begin, end) {
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if (begin < 0) {
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begin = 0;
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}
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if (end > this.end) {
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end = this.end;
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}
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return this.bytes.subarray(begin, end);
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}
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reset() {
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this.pos = this.start;
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}
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moveStart() {
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this.start = this.pos;
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}
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makeSubStream(start, length, dict = null) {
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return new Stream(this.bytes.buffer, start, length, dict);
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}
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}
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exports.Stream = Stream;
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class StringStream extends Stream {
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constructor(str) {
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super((0, _util.stringToBytes)(str));
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}
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}
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exports.StringStream = StringStream;
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class NullStream extends Stream {
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constructor() {
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super(new Uint8Array(0));
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}
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}
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exports.NullStream = NullStream;
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