all files / core/compression/ ascii-85-stream.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
1×
1×
1×
1×
1×
1×
 
1×
1×
1×
1×
 
 
1×
 
1×
1×
1×
1×
 
 
 
 
 
 
 
 
 
1×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1×
 
1×
 
 
/* istanbul ignore next */ 
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
define(["require", "exports", "../decode-stream", "../utils"], function (require, exports, decode_stream_1, utils_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var _PdfAscii85Stream = (function (_super) {
        __extends(_PdfAscii85Stream, _super);
        function _PdfAscii85Stream(str, maybeLength) {
            var _this = this;
            if (maybeLength) {
                maybeLength *= 0.8;
            }
            _this = _super.call(this, maybeLength) || this;
            _this.stream = str;
            _this.input = new Uint8Array(5);
            return _this;
        }
        _PdfAscii85Stream.prototype.readBlock = function () {
            var tildaCharacter = 0x7e;
            var lowerCharacter = 0x7a;
            var eof = -1;
            var str = this.stream;
            var c = str.getByte();
            while (utils_1._isWhiteSpace(c)) {
                c = str.getByte();
            }
            if (c === eof || c === tildaCharacter) {
                this.eof = true;
                return;
            }
            var bufferLength = this.bufferLength;
            var buffer;
            var i;
            if (c === lowerCharacter) {
                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 = str.getByte();
                    while (utils_1._isWhiteSpace(c)) {
                        c = str.getByte();
                    }
                    input[Number.parseInt(i.toString(), 10)] = c;
                    if (c === eof || c === tildaCharacter) {
                        break;
                    }
                }
                buffer = this.ensureBuffer(bufferLength + i - 1);
                this.bufferLength += i - 1;
                if (i < 5) {
                    for (; i < 5; ++i) {
                        input[Number.parseInt(i.toString(), 10)] = 0x21 + 84;
                    }
                    this.eof = true;
                }
                var t = 0;
                for (i = 0; i < 5; ++i) {
                    t = t * 85 + (input[Number.parseInt(i.toString(), 10)] - 0x21);
                }
                for (i = 3; i >= 0; --i) {
                    buffer[bufferLength + i] = t & 0xff;
                    t >>= 8;
                }
            }
        };
        return _PdfAscii85Stream;
    }(decode_stream_1._PdfDecodeStream));
    exports._PdfAscii85Stream = _PdfAscii85Stream;
});