/var/www/greso.tech/server/nsm/node_modules/pdf-lib/cjs/core/streams
Edit: /var/www/greso.tech/server/nsm/node_modules/pdf-lib/cjs/core/streams/Ascii85Stream.js (2876B)
"use strict";
/*
* Copyright 2012 Mozilla Foundation
*
* The Ascii85Stream class contained in this file is a TypeScript port of the
* JavaScript Ascii85Stream class in Mozilla's pdf.js project, made available
* under the Apache 2.0 open source license.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var DecodeStream_1 = tslib_1.__importDefault(require("./DecodeStream"));
var isSpace = function (ch) {
return ch === 0x20 || ch === 0x09 || ch === 0x0d || ch === 0x0a;
};
var Ascii85Stream = /** @class */ (function (_super) {
tslib_1.__extends(Ascii85Stream, _super);
function Ascii85Stream(stream, maybeLength) {
var _this = _super.call(this, maybeLength) || this;
_this.stream = stream;
_this.input = new Uint8Array(5);
// Most streams increase in size when decoded, but Ascii85 streams
// typically shrink by ~20%.
if (maybeLength) {
maybeLength = 0.8 * maybeLength;
}
return _this;
}
Ascii85Stream.prototype.readBlock = function () {
var TILDA_CHAR = 0x7e; // '~'
var Z_LOWER_CHAR = 0x7a; // 'z'
var EOF = -1;
var stream = this.stream;
var c = stream.getByte();
while (isSpace(c)) {
c = stream.getByte();
}
if (c === EOF || c === TILDA_CHAR) {
this.eof = true;
return;
}
var bufferLength = this.bufferLength;
var buffer;
var i;
// special code for z
if (c === Z_LOWER_CHAR) {
buffer = this.ensureBuffer(bufferLength + 4);
for (i = 0; i < 4; ++i) {
buffer[bufferLength + i] = 0;
}
this.bufferLength += 4;
}
else {
var input = this.input;
input[0] = c;
for (i = 1; i < 5; ++i) {
c = stream.getByte();
while (isSpace(c)) {
c = stream.getByte();
}
input[i] = c;
if (c === EOF || c === TILDA_CHAR) {
break;
}
}
buffer = this.ensureBuffer(bufferLength + i - 1);
this.bufferLength += i - 1;
// partial ending;
if (i < 5) {
for (; i < 5; ++i) {
input[i] = 0x21 + 84;
}
this.eof = true;
}
var t = 0;
for (i = 0; i < 5; ++i) {
t = t * 85 + (input[i] - 0x21);
}
for (i = 3; i >= 0; --i) {
buffer[bufferLength + i] = t & 0xff;
t >>= 8;
}
}
};
return Ascii85Stream;
}(DecodeStream_1.default));
exports.default = Ascii85Stream;
//# sourceMappingURL=Ascii85Stream.js.map