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