/**
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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.Ascii85Stream = void 0;
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var _decode_stream = require("./decode_stream.js");
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var _core_utils = require("./core_utils.js");
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class Ascii85Stream extends _decode_stream.DecodeStream {
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constructor(str, maybeLength) {
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if (maybeLength) {
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maybeLength *= 0.8;
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}
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super(maybeLength);
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this.str = str;
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this.dict = str.dict;
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this.input = new Uint8Array(5);
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}
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readBlock() {
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const TILDA_CHAR = 0x7e;
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const Z_LOWER_CHAR = 0x7a;
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const EOF = -1;
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const str = this.str;
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let c = str.getByte();
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while ((0, _core_utils.isWhiteSpace)(c)) {
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c = str.getByte();
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}
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if (c === EOF || c === TILDA_CHAR) {
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this.eof = true;
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return;
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}
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const bufferLength = this.bufferLength;
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let buffer, i;
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if (c === Z_LOWER_CHAR) {
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buffer = this.ensureBuffer(bufferLength + 4);
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for (i = 0; i < 4; ++i) {
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buffer[bufferLength + i] = 0;
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}
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this.bufferLength += 4;
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} else {
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const input = this.input;
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input[0] = c;
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for (i = 1; i < 5; ++i) {
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c = str.getByte();
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while ((0, _core_utils.isWhiteSpace)(c)) {
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c = str.getByte();
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}
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input[i] = c;
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if (c === EOF || c === TILDA_CHAR) {
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break;
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}
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}
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buffer = this.ensureBuffer(bufferLength + i - 1);
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this.bufferLength += i - 1;
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if (i < 5) {
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for (; i < 5; ++i) {
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input[i] = 0x21 + 84;
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}
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this.eof = true;
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}
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let t = 0;
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for (i = 0; i < 5; ++i) {
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t = t * 85 + (input[i] - 0x21);
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}
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for (i = 3; i >= 0; --i) {
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buffer[bufferLength + i] = t & 0xff;
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t >>= 8;
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}
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}
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}
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}
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exports.Ascii85Stream = Ascii85Stream;
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