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beginnings of inflate decompression

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This commit is contained in:
Andreas Gal 2011-05-09 18:04:22 -07:00
parent a018fe60ef
commit 247509680e
1 changed files with 600 additions and 26 deletions
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pdf.js
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@ -90,37 +90,611 @@ var StringStream = (function() {
return constructor;
})();
var Buffer = (function() {
function constructor(length) {
this.bytes = new Uint8Array(length ? length : 4096);
this.pos = 0;
}
constructor.prototype = {
putByte: function(b) {
var bytes = this.bytes;
var length = bytes.length;
if (this.pos >= length) {
var newBytes = new Uint8Array(length * 2);
for (var n = 0; n < length; ++n)
newBytes[n] = bytes[n];
bytes = newBytes;
}
bytes[this.pos++] = b;
},
asStream: function() {
return new Stream(this.bytes);
}
}
return constructor;
})();
var FlateStream = (function() {
const codeMap = [
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
];
const lengthDecode = [
[0, 3],
[0, 4],
[0, 5},
[0, 6},
[0, 7},
[0, 8},
[0, 9},
[0, 10],
[1, 11],
[1, 13],
[1, 15],
[1, 17],
[2, 19],
[2, 23],
[2, 27],
[2, 31],
[3, 35],
[3, 43],
[3, 51],
[3, 59],
[4, 67],
[4, 83],
[4, 99],
[4, 115],
[5, 131],
[5, 163],
[5, 195],
[5, 227],
[0, 258],
[0, 258],
[0, 258]
];
const fixedLitCodeTabCodes = [
[7, 0x0100],
[8, 0x0050],
[8, 0x0010],
[8, 0x0118],
[7, 0x0110],
[8, 0x0070],
[8, 0x0030],
[9, 0x00c0],
[7, 0x0108],
[8, 0x0060],
[8, 0x0020],
[9, 0x00a0],
[8, 0x0000],
[8, 0x0080],
[8, 0x0040],
[9, 0x00e0],
[7, 0x0104],
[8, 0x0058],
[8, 0x0018],
[9, 0x0090],
[7, 0x0114],
[8, 0x0078],
[8, 0x0038],
[9, 0x00d0],
[7, 0x010c],
[8, 0x0068],
[8, 0x0028],
[9, 0x00b0],
[8, 0x0008],
[8, 0x0088],
[8, 0x0048],
[9, 0x00f0],
[7, 0x0102],
[8, 0x0054],
[8, 0x0014],
[8, 0x011c],
[7, 0x0112],
[8, 0x0074],
[8, 0x0034],
[9, 0x00c8],
[7, 0x010a],
[8, 0x0064],
[8, 0x0024],
[9, 0x00a8],
[8, 0x0004],
[8, 0x0084],
[8, 0x0044],
[9, 0x00e8],
[7, 0x0106],
[8, 0x005c],
[8, 0x001c],
[9, 0x0098],
[7, 0x0116],
[8, 0x007c],
[8, 0x003c],
[9, 0x00d8],
[7, 0x010e],
[8, 0x006c],
[8, 0x002c],
[9, 0x00b8],
[8, 0x000c],
[8, 0x008c],
[8, 0x004c],
[9, 0x00f8],
[7, 0x0101],
[8, 0x0052],
[8, 0x0012],
[8, 0x011a],
[7, 0x0111],
[8, 0x0072],
[8, 0x0032],
[9, 0x00c4],
[7, 0x0109],
[8, 0x0062],
[8, 0x0022],
[9, 0x00a4],
[8, 0x0002],
[8, 0x0082],
[8, 0x0042],
[9, 0x00e4],
[7, 0x0105],
[8, 0x005a],
[8, 0x001a],
[9, 0x0094],
[7, 0x0115],
[8, 0x007a],
[8, 0x003a],
[9, 0x00d4],
[7, 0x010d],
[8, 0x006a],
[8, 0x002a],
[9, 0x00b4],
[8, 0x000a],
[8, 0x008a],
[8, 0x004a],
[9, 0x00f4],
[7, 0x0103],
[8, 0x0056],
[8, 0x0016],
[8, 0x011e],
[7, 0x0113],
[8, 0x0076],
[8, 0x0036],
[9, 0x00cc],
[7, 0x010b],
[8, 0x0066],
[8, 0x0026],
[9, 0x00ac],
[8, 0x0006],
[8, 0x0086],
[8, 0x0046],
[9, 0x00ec],
[7, 0x0107],
[8, 0x005e],
[8, 0x001e],
[9, 0x009c],
[7, 0x0117],
[8, 0x007e],
[8, 0x003e],
[9, 0x00dc],
[7, 0x010f],
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[9, 0x00fc],
[7, 0x0100],
[8, 0x0051],
[8, 0x0011],
[8, 0x0119],
[7, 0x0110],
[8, 0x0071],
[8, 0x0031],
[9, 0x00c2],
[7, 0x0108],
[8, 0x0061],
[8, 0x0021],
[9, 0x00a2],
[8, 0x0001],
[8, 0x0081],
[8, 0x0041],
[9, 0x00e2],
[7, 0x0104],
[8, 0x0059],
[8, 0x0019],
[9, 0x0092],
[7, 0x0114],
[8, 0x0079],
[8, 0x0039],
[9, 0x00d2],
[7, 0x010c],
[8, 0x0069],
[8, 0x0029],
[9, 0x00b2],
[8, 0x0009],
[8, 0x0089],
[8, 0x0049],
[9, 0x00f2],
[7, 0x0102],
[8, 0x0055],
[8, 0x0015],
[8, 0x011d],
[7, 0x0112],
[8, 0x0075],
[8, 0x0035],
[9, 0x00ca],
[7, 0x010a],
[8, 0x0065],
[8, 0x0025],
[9, 0x00aa],
[8, 0x0005],
[8, 0x0085],
[8, 0x0045],
[9, 0x00ea],
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[8, 0x001d],
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[7, 0x0116],
[8, 0x007d],
[8, 0x003d],
[9, 0x00da],
[7, 0x010e],
[8, 0x006d],
[8, 0x002d],
[9, 0x00ba],
[8, 0x000d],
[8, 0x008d],
[8, 0x004d],
[9, 0x00fa],
[7, 0x0101],
[8, 0x0053],
[8, 0x0013],
[8, 0x011b],
[7, 0x0111],
[8, 0x0073],
[8, 0x0033],
[9, 0x00c6],
[7, 0x0109],
[8, 0x0063],
[8, 0x0023],
[9, 0x00a6],
[8, 0x0003],
[8, 0x0083],
[8, 0x0043],
[9, 0x00e6],
[7, 0x0105],
[8, 0x005b],
[8, 0x001b],
[9, 0x0096],
[7, 0x0115],
[8, 0x007b],
[8, 0x003b],
[9, 0x00d6],
[7, 0x010d],
[8, 0x006b],
[8, 0x002b],
[9, 0x00b6],
[8, 0x000b],
[8, 0x008b],
[8, 0x004b],
[9, 0x00f6],
[7, 0x0103],
[8, 0x0057],
[8, 0x0017],
[8, 0x011f],
[7, 0x0113],
[8, 0x0077],
[8, 0x0037],
[9, 0x00ce],
[7, 0x010b],
[8, 0x0067],
[8, 0x0027],
[9, 0x00ae],
[8, 0x0007],
[8, 0x0087],
[8, 0x0047],
[9, 0x00ee],
[7, 0x0107],
[8, 0x005f],
[8, 0x001f],
[9, 0x009e],
[7, 0x0117],
[8, 0x007f],
[8, 0x003f],
[9, 0x00de],
[7, 0x010f],
[8, 0x006f],
[8, 0x002f],
[9, 0x00be],
[8, 0x000f],
[8, 0x008f],
[8, 0x004f],
[9, 0x00fe],
[7, 0x0100],
[8, 0x0050],
[8, 0x0010],
[8, 0x0118],
[7, 0x0110],
[8, 0x0070],
[8, 0x0030],
[9, 0x00c1],
[7, 0x0108],
[8, 0x0060],
[8, 0x0020],
[9, 0x00a1],
[8, 0x0000],
[8, 0x0080],
[8, 0x0040],
[9, 0x00e1],
[7, 0x0104],
[8, 0x0058],
[8, 0x0018],
[9, 0x0091],
[7, 0x0114],
[8, 0x0078],
[8, 0x0038],
[9, 0x00d1],
[7, 0x010c],
[8, 0x0068],
[8, 0x0028],
[9, 0x00b1],
[8, 0x0008],
[8, 0x0088],
[8, 0x0048],
[9, 0x00f1],
[7, 0x0102],
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[8, 0x0014],
[8, 0x011c],
[7, 0x0112],
[8, 0x0074],
[8, 0x0034],
[9, 0x00c9],
[7, 0x010a],
[8, 0x0064],
[8, 0x0024],
[9, 0x00a9],
[8, 0x0004],
[8, 0x0084],
[8, 0x0044],
[9, 0x00e9],
[7, 0x0106],
[8, 0x005c],
[8, 0x001c],
[9, 0x0099],
[7, 0x0116],
[8, 0x007c],
[8, 0x003c],
[9, 0x00d9],
[7, 0x010e],
[8, 0x006c],
[8, 0x002c],
[9, 0x00b9],
[8, 0x000c],
[8, 0x008c],
[8, 0x004c],
[9, 0x00f9],
[7, 0x0101],
[8, 0x0052],
[8, 0x0012],
[8, 0x011a],
[7, 0x0111],
[8, 0x0072],
[8, 0x0032],
[9, 0x00c5],
[7, 0x0109],
[8, 0x0062],
[8, 0x0022],
[9, 0x00a5],
[8, 0x0002],
[8, 0x0082],
[8, 0x0042],
[9, 0x00e5],
[7, 0x0105],
[8, 0x005a],
[8, 0x001a],
[9, 0x0095],
[7, 0x0115],
[8, 0x007a],
[8, 0x003a],
[9, 0x00d5],
[7, 0x010d],
[8, 0x006a],
[8, 0x002a],
[9, 0x00b5],
[8, 0x000a],
[8, 0x008a],
[8, 0x004a],
[9, 0x00f5],
[7, 0x0103],
[8, 0x0056],
[8, 0x0016],
[8, 0x011e],
[7, 0x0113],
[8, 0x0076],
[8, 0x0036],
[9, 0x00cd],
[7, 0x010b],
[8, 0x0066],
[8, 0x0026],
[9, 0x00ad],
[8, 0x0006],
[8, 0x0086],
[8, 0x0046],
[9, 0x00ed],
[7, 0x0107],
[8, 0x005e],
[8, 0x001e],
[9, 0x009d],
[7, 0x0117],
[8, 0x007e],
[8, 0x003e],
[9, 0x00dd],
[7, 0x010f],
[8, 0x006e],
[8, 0x002e],
[9, 0x00bd],
[8, 0x000e],
[8, 0x008e],
[8, 0x004e],
[9, 0x00fd],
[7, 0x0100],
[8, 0x0051],
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[8, 0x0119],
[7, 0x0110],
[8, 0x0071],
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[8, 0x0021],
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[8, 0x0079],
[8, 0x0039],
[9, 0x00d3],
[7, 0x010c],
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[8, 0x0009],
[8, 0x0089],
[8, 0x0049],
[9, 0x00f3],
[7, 0x0102],
[8, 0x0055],
[8, 0x0015],
[8, 0x011d],
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[9, 0x00cb],
[7, 0x010a],
[8, 0x0065],
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[8, 0x0085],
[8, 0x0045],
[9, 0x00eb],
[7, 0x0106],
[8, 0x005d],
[8, 0x001d],
[9, 0x009b],
[7, 0x0116],
[8, 0x007d],
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[9, 0x00db],
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[8, 0x002d],
[9, 0x00bb],
[8, 0x000d],
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[8, 0x004d],
[9, 0x00fb],
[7, 0x0101],
[8, 0x0053],
[8, 0x0013],
[8, 0x011b],
[7, 0x0111],
[8, 0x0073],
[8, 0x0033],
[9, 0x00c7],
[7, 0x0109],
[8, 0x0063],
[8, 0x0023],
[9, 0x00a7],
[8, 0x0003],
[8, 0x0083],
[8, 0x0043],
[9, 0x00e7],
[7, 0x0105],
[8, 0x005b],
[8, 0x001b],
[9, 0x0097],
[7, 0x0115],
[8, 0x007b],
[8, 0x003b],
[9, 0x00d7],
[7, 0x010d],
[8, 0x006b],
[8, 0x002b],
[9, 0x00b7],
[8, 0x000b],
[8, 0x008b],
[8, 0x004b],
[9, 0x00f7],
[7, 0x0103],
[8, 0x0057],
[8, 0x0017],
[8, 0x011f],
[7, 0x0113],
[8, 0x0077],
[8, 0x0037],
[9, 0x00cf],
[7, 0x010b],
[8, 0x0067],
[8, 0x0027],
[9, 0x00af],
[8, 0x0007],
[8, 0x0087],
[8, 0x0047],
[9, 0x00ef],
[7, 0x0107],
[8, 0x005f],
[8, 0x001f],
[9, 0x009f],
[7, 0x0117],
[8, 0x007f],
[8, 0x003f],
[9, 0x00df],
[7, 0x010f],
[8, 0x006f],
[8, 0x002f],
[9, 0x00bf],
[8, 0x000f],
[8, 0x008f],
[8, 0x004f],
[9, 0x00ff]
];
const fixedLitCodeTab = [
fixedLitCodeTabCodes, 9
];
const fixedDistCodeTabCodes = [
[5, 0x0000],
[5, 0x0010],
[5, 0x0008],
[5, 0x0018],
[5, 0x0004],
[5, 0x0014],
[5, 0x000c],
[5, 0x001c],
[5, 0x0002],
[5, 0x0012],
[5, 0x000a],
[5, 0x001a],
[5, 0x0006],
[5, 0x0016],
[5, 0x000e],
[0, 0x0000],
[5, 0x0001],
[5, 0x0011],
[5, 0x0009],
[5, 0x0019],
[5, 0x0005],
[5, 0x0015],
[5, 0x000d],
[5, 0x001d],
[5, 0x0003],
[5, 0x0013],
[5, 0x000b],
[5, 0x001b],
[5, 0x0007],
[5, 0x0017],
[5, 0x000f],
[0, 0x0000]
];
const fixedDistCodeTab = [
fixedDistCodeTabCodes, 5
];
function constructor() {
this.codeSize = 0;
}
constructor.prototype = {
getBits: function(bits) {
var codeSize = this.codeSize;
}
};
return constructor;