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494 lines
15 KiB
C++
494 lines
15 KiB
C++
#include "StuffIt13Decompressor.h"
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#include "CSInputBuffer.h"
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#include "PrefixCode.h"
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static const int FirstCodeLengths_1[321] =
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{
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4, 5, 7, 8, 8, 9, 9, 9, 9, 7, 9, 9, 9, 8, 9, 9,
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9, 9, 9, 9, 9, 9, 9,10, 9, 9,10,10, 9,10, 9, 9,
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5, 9, 9, 9, 9,10, 9, 9, 9, 9, 9, 9, 9, 9, 7, 9,
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9, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, 8, 9, 9, 8, 8, 9, 9, 9, 9, 9, 9, 9, 7, 8, 9,
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7, 9, 9, 7, 7, 9, 9, 9, 9,10, 9,10,10,10, 9, 9,
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9, 5, 9, 8, 7, 5, 9, 8, 8, 7, 9, 9, 8, 8, 5, 5,
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7,10, 5, 8, 5, 8, 9, 9, 9, 9, 9,10, 9, 9,10, 9,
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9,10,10,10,10,10,10,10, 9,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10, 9, 9,10,10,10,10,10,10,
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10,10,10,10,10,10,10,10,10,10, 9,10,10,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10, 9, 9,10,10,
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9,10,10,10,10,10,10,10, 9,10,10,10, 9,10, 9, 5,
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6, 5, 5, 8, 9, 9, 9, 9, 9, 9,10,10,10, 9,10,10,
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10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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10,10,10, 9,10, 9, 9, 9,10, 9,10, 9,10, 9,10, 9,
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10,10,10, 9,10, 9,10,10, 9, 9, 9, 6, 9, 9,10, 9,
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5,
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};
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static const int SecondCodeLengths_1[321] =
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{
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4, 5, 6, 6, 7, 7, 6, 7, 7, 7, 6, 8, 7, 8, 8, 8,
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8, 9, 6, 9, 8, 9, 8, 9, 9, 9, 8,10, 5, 9, 7, 9,
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6, 9, 8,10, 9,10, 8, 8, 9, 9, 7, 9, 8, 9, 8, 9,
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8, 8, 6, 9, 9, 8, 8, 9, 9,10, 8, 9, 9,10, 8,10,
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8, 8, 8, 8, 8, 9, 7,10, 6, 9, 9,11, 7, 8, 8, 9,
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8,10, 7, 8, 6, 9,10, 9, 9,10, 8,11, 9,11, 9,10,
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9, 8, 9, 8, 8, 8, 8,10, 9, 9,10,10, 8, 9, 8, 8,
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8,11, 9, 8, 8, 9, 9,10, 8,11,10,10, 8,10, 9,10,
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8, 9, 9,11, 9,11, 9,10,10,11,10,12, 9,12,10,11,
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10,11, 9,10,10,11,10,11,10,11,10,11,10,10,10, 9,
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9, 9, 8, 7, 6, 8,11,11, 9,12,10,12, 9,11,11,11,
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10,12,11,11,10,12,10,11,10,10,10,11,10,11,11,11,
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9,12,10,12,11,12,10,11,10,12,11,12,11,12,11,12,
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10,12,11,12,11,11,10,12,10,11,10,12,10,12,10,12,
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10,11,11,11,10,11,11,11,10,12,11,12,10,10,11,11,
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9,12,11,12,10,11,10,12,10,11,10,12,10,11,10, 7,
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5, 4, 6, 6, 7, 7, 7, 8, 8, 7, 7, 6, 8, 6, 7, 7,
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9, 8, 9, 9,10,11,11,11,12,11,10,11,12,11,12,11,
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12,12,12,12,11,12,12,11,12,11,12,11,13,11,12,10,
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13,10,14,14,13,14,15,14,16,15,15,18,18,18, 9,18,
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8,
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};
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static const int OffsetCodeLengths_1[11] =
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{
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5, 6, 3, 3, 3, 3, 3, 3, 3, 4, 6,
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};
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static const int FirstCodeLengths_2[321] =
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{
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4, 7, 7, 8, 7, 8, 8, 8, 8, 7, 8, 7, 8, 7, 9, 8,
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8, 8, 9, 9, 9, 9,10,10, 9,10,10,10,10,10, 9, 9,
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5, 9, 8, 9, 9,11,10, 9, 8, 9, 9, 9, 8, 9, 7, 8,
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8, 8, 9, 9, 9, 9, 9,10, 9, 9, 9,10, 9, 9,10, 9,
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8, 8, 7, 7, 7, 8, 8, 9, 8, 8, 9, 9, 8, 8, 7, 8,
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7,10, 8, 7, 7, 9, 9, 9, 9,10,10,11,11,11,10, 9,
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8, 6, 8, 7, 7, 5, 7, 7, 7, 6, 9, 8, 6, 7, 6, 6,
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7, 9, 6, 6, 6, 7, 8, 8, 8, 8, 9,10, 9,10, 9, 9,
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8, 9,10,10, 9,10,10, 9, 9,10,10,10,10,10,10,10,
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9,10,10,11,10,10,10,10,10,10,10,11,10,11,10,10,
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9,11,10,10,10,10,10,10, 9, 9,10,11,10,11,10,11,
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10,12,10,11,10,12,11,12,10,12,10,11,10,11,11,11,
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9,10,11,11,11,12,12,10,10,10,11,11,10,11,10,10,
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9,11,10,11,10,11,11,11,10,11,11,12,11,11,10,10,
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10,11,10,10,11,11,12,10,10,11,11,12,11,11,10,11,
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9,12,10,11,11,11,10,11,10,11,10,11, 9,10, 9, 7,
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3, 5, 6, 6, 7, 7, 8, 8, 8, 9, 9, 9,11,10,10,10,
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12,13,11,12,12,11,13,12,12,11,12,12,13,12,14,13,
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14,13,15,13,14,15,15,14,13,15,15,14,15,14,15,15,
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14,15,13,13,14,15,15,14,14,16,16,15,15,15,12,15,
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10,
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};
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static const int SecondCodeLengths_2[321] =
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{
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5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 7, 8, 7, 7,
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7, 8, 8, 8, 8, 9, 8, 9, 8, 9, 9, 9, 7, 9, 8, 8,
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6, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 8,
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8, 8, 8, 9, 8, 9, 8, 9, 9,10, 8,10, 8, 9, 9, 8,
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8, 8, 7, 8, 8, 9, 8, 9, 7, 9, 8,10, 8, 9, 8, 9,
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8, 9, 8, 8, 8, 9, 9, 9, 9,10, 9,11, 9,10, 9,10,
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8, 8, 8, 9, 8, 8, 8, 9, 9, 8, 9,10, 8, 9, 8, 8,
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8,11, 8, 7, 8, 9, 9, 9, 9,10, 9,10, 9,10, 9, 8,
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8, 9, 9,10, 9,10, 9,10, 8,10, 9,10, 9,11,10,11,
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9,11,10,10,10,11, 9,11, 9,10, 9,11, 9,11,10,10,
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9,10, 9, 9, 8,10, 9,11, 9, 9, 9,11,10,11, 9,11,
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9,11, 9,11,10,11,10,11,10,11, 9,10,10,11,10,10,
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8,10, 9,10,10,11, 9,11, 9,10,10,11, 9,10,10, 9,
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9,10, 9,10, 9,10, 9,10, 9,11, 9,11,10,10, 9,10,
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9,11, 9,11, 9,11, 9,10, 9,11, 9,11, 9,11, 9,10,
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8,11, 9,10, 9,10, 9,10, 8,10, 8, 9, 8, 9, 8, 7,
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4, 4, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 7, 8, 8,
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9, 9,10,10,10,10,10,10,11,11,10,10,12,11,11,12,
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12,11,12,12,11,12,12,12,12,12,12,11,12,11,13,12,
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13,12,13,14,14,14,15,13,14,13,14,18,18,17, 7,16,
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9,
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};
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static const int OffsetCodeLengths_2[13] =
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{
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5, 6, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 6,
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};
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static const int FirstCodeLengths_3[321] =
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{
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6, 6, 6, 6, 6, 9, 8, 8, 4, 9, 8, 9, 8, 9, 9, 9,
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8, 9, 9,10, 8,10,10,10, 9,10,10,10, 9,10,10, 9,
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9, 9, 8,10, 9,10, 9,10, 9,10, 9,10, 9, 9, 8, 9,
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8, 9, 9, 9,10,10,10,10, 9, 9, 9,10, 9,10, 9, 9,
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7, 8, 8, 9, 8, 9, 9, 9, 8, 9, 9,10, 9, 9, 8, 9,
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8, 9, 8, 8, 8, 9, 9, 9, 9, 9,10,10,10,10,10, 9,
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8, 8, 9, 8, 9, 7, 8, 8, 9, 8,10,10, 8, 9, 8, 8,
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8,10, 8, 8, 8, 8, 9, 9, 9, 9,10,10,10,10,10, 9,
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7, 9, 9,10,10,10,10,10, 9,10,10,10,10,10,10, 9,
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9,10,10,10,10,10,10,10,10, 9,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10, 9, 9, 9,10,10,10,10,10,
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10,10,10,10,10,10,10,10,10,10, 9,10,10,10,10, 9,
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8, 9,10,10,10,10,10,10,10,10,10,10, 9,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10,10,10,10, 9,
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9,10,10,10,10,10,10, 9,10,10,10,10,10,10, 9, 9,
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9,10,10,10,10,10,10, 9, 9,10, 9, 9, 8, 9, 8, 9,
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4, 6, 6, 6, 7, 8, 8, 9, 9,10,10,10, 9,10,10,10,
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10,10,10,10,10,10,10,10,10,10,10,10,10,10, 7,10,
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10,10, 7,10,10, 7, 7, 7, 7, 7, 6, 7,10, 7, 7,10,
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7, 7, 7, 6, 7, 6, 6, 7, 7, 6, 6, 9, 6, 9,10, 6,
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10,
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};
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static const int SecondCodeLengths_3[321] =
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{
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5, 6, 6, 6, 6, 7, 7, 7, 6, 8, 7, 8, 7, 9, 8, 8,
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7, 7, 8, 9, 9, 9, 9,10, 8, 9, 9,10, 8,10, 9, 8,
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6,10, 8,10, 8,10, 9, 9, 9, 9, 9,10, 9, 9, 8, 9,
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8, 9, 8, 9, 9,10, 9,10, 9, 9, 8,10, 9,11,10, 8,
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8, 8, 8, 9, 7, 9, 9,10, 8, 9, 8,11, 9,10, 9,10,
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8, 9, 9, 9, 9, 8, 9, 9,10,10,10,12,10,11,10,10,
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8, 9, 9, 9, 8, 9, 8, 8,10, 9,10,11, 8,10, 9, 9,
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8,12, 8, 9, 9, 9, 9, 8, 9,10, 9,12,10,10,10, 8,
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7,11,10, 9,10,11, 9,11, 7,11,10,12,10,12,10,11,
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9,11, 9,12,10,12,10,12,10, 9,11,12,10,12,10,11,
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9,10, 9,10, 9,11,11,12, 9,10, 8,12,11,12, 9,12,
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10,12,10,13,10,12,10,12,10,12,10, 9,10,12,10, 9,
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8,11,10,12,10,12,10,12,10,11,10,12, 8,12,10,11,
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10,10,10,12, 9,11,10,12,10,12,11,12,10, 9,10,12,
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9,10,10,12,10,11,10,11,10,12, 8,12, 9,12, 8,12,
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8,11,10,11,10,11, 9,10, 8,10, 9, 9, 8, 9, 8, 7,
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4, 3, 5, 5, 6, 5, 6, 6, 7, 7, 8, 8, 8, 7, 7, 7,
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9, 8, 9, 9,11, 9,11, 9, 8, 9, 9,11,12,11,12,12,
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13,13,12,13,14,13,14,13,14,13,13,13,12,13,13,12,
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13,13,14,14,13,13,14,14,14,14,15,18,17,18, 8,16,
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10,
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};
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static const int OffsetCodeLengths_3[14] =
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{
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6, 7, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 5, 7,
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};
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static const int FirstCodeLengths_4[321] =
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{
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2, 6, 6, 7, 7, 8, 7, 8, 7, 8, 8, 9, 8, 9, 9, 9,
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8, 8, 9, 9, 9,10,10, 9, 8,10, 9,10, 9,10, 9, 9,
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6, 9, 8, 9, 9,10, 9, 9, 9,10, 9, 9, 9, 9, 8, 8,
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8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,10,10, 9,
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7, 7, 8, 8, 8, 8, 9, 9, 7, 8, 9,10, 8, 8, 7, 8,
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8,10, 8, 8, 8, 9, 8, 9, 9,10, 9,11,10,11, 9, 9,
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8, 7, 9, 8, 8, 6, 8, 8, 8, 7,10, 9, 7, 8, 7, 7,
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8,10, 7, 7, 7, 8, 9, 9, 9, 9,10,11, 9,11,10, 9,
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7, 9,10,10,10,11,11,10,10,11,10,10,10,11,11,10,
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9,10,10,11,10,11,10,11,10,10,10,11,10,11,10,10,
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9,10,10,11,10,10,10,10, 9,10,10,10,10,11,10,11,
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10,11,10,11,11,11,10,12,10,11,10,11,10,11,11,10,
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8,10,10,11,10,11,11,11,10,11,10,11,10,11,11,11,
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9,10,11,11,10,11,11,11,10,11,11,11,10,10,10,10,
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10,11,10,10,11,11,10,10, 9,11,10,10,11,11,10,10,
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10,11,10,10,10,10,10,10, 9,11,10,10, 8,10, 8, 6,
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5, 6, 6, 7, 7, 8, 8, 8, 9,10,11,10,10,11,11,12,
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12,10,11,12,12,12,12,13,13,13,13,13,12,13,13,15,
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14,12,14,15,16,12,12,13,15,14,16,15,17,18,15,17,
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16,15,15,15,15,13,13,10,14,12,13,17,17,18,10,17,
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4,
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};
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static const int SecondCodeLengths_4[321] =
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{
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4, 5, 6, 6, 6, 6, 7, 7, 6, 7, 7, 9, 6, 8, 8, 7,
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7, 8, 8, 8, 6, 9, 8, 8, 7, 9, 8, 9, 8, 9, 8, 9,
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6, 9, 8, 9, 8,10, 9, 9, 8,10, 8,10, 8, 9, 8, 9,
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8, 8, 7, 9, 9, 9, 9, 9, 8,10, 9,10, 9,10, 9, 8,
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7, 8, 9, 9, 8, 9, 9, 9, 7,10, 9,10, 9, 9, 8, 9,
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8, 9, 8, 8, 8, 9, 9,10, 9, 9, 8,11, 9,11,10,10,
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8, 8,10, 8, 8, 9, 9, 9,10, 9,10,11, 9, 9, 9, 9,
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8, 9, 8, 8, 8,10,10, 9, 9, 8,10,11,10,11,11, 9,
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8, 9,10,11, 9,10,11,11, 9,12,10,10,10,12,11,11,
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9,11,11,12, 9,11, 9,10,10,10,10,12, 9,11,10,11,
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9,11,11,11,10,11,11,12, 9,10,10,12,11,11,10,11,
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9,11,10,11,10,11, 9,11,11, 9, 8,11,10,11,11,10,
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7,12,11,11,11,11,11,12,10,12,11,13,11,10,12,11,
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10,11,10,11,10,11,11,11,10,12,11,11,10,11,10,10,
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10,11,10,12,11,12,10,11, 9,11,10,11,10,11,10,12,
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9,11,11,11, 9,11,10,10, 9,11,10,10, 9,10, 9, 7,
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4, 5, 5, 5, 6, 6, 7, 6, 8, 7, 8, 9, 9, 7, 8, 8,
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10, 9,10,10,12,10,11,11,11,11,10,11,12,11,11,11,
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11,11,13,12,11,12,13,12,12,12,13,11, 9,12,13, 7,
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13,11,13,11,10,11,13,15,15,12,14,15,15,15, 6,15,
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5,
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};
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static const int OffsetCodeLengths_4[11] =
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{
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3, 6, 5, 4, 2, 3, 3, 3, 4, 4, 6,
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};
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static const int FirstCodeLengths_5[321] =
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{
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7, 9, 9, 9, 9, 9, 9, 9, 9, 8, 9, 9, 9, 7, 9, 9,
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9, 9, 9, 9, 9, 9, 9,10, 9,10, 9,10, 9,10, 9, 9,
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5, 9, 7, 9, 9, 9, 9, 9, 7, 7, 7, 9, 7, 7, 8, 7,
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8, 8, 7, 7, 9, 9, 9, 9, 7, 7, 7, 9, 9, 9, 9, 9,
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9, 7, 9, 7, 7, 7, 7, 9, 9, 7, 9, 9, 7, 7, 7, 7,
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7, 9, 7, 8, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, 7, 8, 7, 7, 7, 8, 8, 6, 7, 9, 7, 7, 8, 7, 5,
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6, 9, 5, 7, 5, 6, 7, 7, 9, 8, 9, 9, 9, 9, 9, 9,
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9, 9,10, 9,10,10,10, 9, 9,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10, 9,10,10,10,
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9,10,10,10, 9, 9,10, 9, 9, 9, 9,10,10,10,10,10,
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10,10,10,10,10,10, 9,10,10,10,10,10,10,10,10,10,
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9,10,10,10, 9,10,10,10, 9, 9, 9,10,10,10,10,10,
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9,10, 9,10,10, 9,10,10, 9,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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9,10,10,10,10,10,10,10, 9,10, 9,10, 9,10,10, 9,
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5, 6, 8, 8, 7, 7, 7, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
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9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
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10,10,10,10,10,10,10,10, 9,10,10, 5,10, 8, 9, 8,
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9,
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};
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static const int SecondCodeLengths_5[321] =
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{
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8,10,11,11,11,12,11,11,12, 6,11,12,10, 5,12,12,
|
|
12,12,12,12,12,13,13,14,13,13,12,13,12,13,12,15,
|
|
4,10, 7, 9,11,11,10, 9, 6, 7, 8, 9, 6, 7, 6, 7,
|
|
8, 7, 7, 8, 8, 8, 8, 8, 8, 9, 8, 7,10, 9,10,10,
|
|
11, 7, 8, 6, 7, 8, 8, 9, 8, 7,10,10, 8, 7, 8, 8,
|
|
7,10, 7, 6, 7, 9, 9, 8,11,11,11,10,11,11,11, 8,
|
|
11, 6, 7, 6, 6, 6, 6, 8, 7, 6,10, 9, 6, 7, 6, 6,
|
|
7,10, 6, 5, 6, 7, 7, 7,10, 8,11, 9,13, 7,14,16,
|
|
12,14,14,15,15,16,16,14,15,15,15,15,15,15,15,15,
|
|
14,15,13,14,14,16,15,17,14,17,15,17,12,14,13,16,
|
|
12,17,13,17,14,13,13,14,14,12,13,15,15,14,15,17,
|
|
14,17,15,14,15,16,12,16,15,14,15,16,15,16,17,17,
|
|
15,15,17,17,13,14,15,15,13,12,16,16,17,14,15,16,
|
|
15,15,13,13,15,13,16,17,15,17,17,17,16,17,14,17,
|
|
14,16,15,17,15,15,14,17,15,17,15,16,15,15,16,16,
|
|
14,17,17,15,15,16,15,17,15,14,16,16,16,16,16,12,
|
|
4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9, 9,
|
|
9, 9, 9,10,10,10,11,10,11,11,11,11,11,12,12,12,
|
|
13,13,12,13,12,14,14,12,13,13,13,13,14,12,13,13,
|
|
14,14,14,13,14,14,15,15,13,15,13,17,17,17, 9,17,
|
|
7,
|
|
};
|
|
|
|
static const int OffsetCodeLengths_5[11] =
|
|
{
|
|
6, 7, 7, 6, 4, 3, 2, 2, 3, 3, 6,
|
|
};
|
|
|
|
static const int *FirstCodeLengths[5] =
|
|
{
|
|
FirstCodeLengths_1,FirstCodeLengths_2,FirstCodeLengths_3,FirstCodeLengths_4,FirstCodeLengths_5
|
|
};
|
|
|
|
static const int *SecondCodeLengths[5] =
|
|
{
|
|
SecondCodeLengths_1,SecondCodeLengths_2,SecondCodeLengths_3,SecondCodeLengths_4,SecondCodeLengths_5
|
|
};
|
|
|
|
static const int *OffsetCodeLengths[5] =
|
|
{
|
|
OffsetCodeLengths_1,OffsetCodeLengths_2,OffsetCodeLengths_3,OffsetCodeLengths_4,OffsetCodeLengths_5
|
|
};
|
|
|
|
static const int OffsetCodeSize[5] = { 11,13,14,11,11 };
|
|
|
|
static const int MetaCodes[37] =
|
|
{
|
|
0x5d8,0x058,0x040,0x0c0,0x000,0x078,0x02b,0x014,
|
|
0x00c,0x01c,0x01b,0x00b,0x010,0x020,0x038,0x018,
|
|
0x0d8,0xbd8,0x180,0x680,0x380,0xf80,0x780,0x480,
|
|
0x080,0x280,0x3d8,0xfd8,0x7d8,0x9d8,0x1d8,0x004,
|
|
0x001,0x002,0x007,0x003,0x008
|
|
};
|
|
|
|
static const int MetaCodeLengths[37] =
|
|
{
|
|
11,8,8,8,8,7,6,5,5,5,5,6,5,6,7,7,9,12,10,11,11,12,
|
|
12,11,11,11,12,12,12,12,12,5,2,2,3,4,5
|
|
};
|
|
|
|
|
|
|
|
StuffIt13Decompressor::StuffIt13Decompressor()
|
|
: LZSSDecompressor(65536)
|
|
, firstcodei(nullptr)
|
|
, secondcodei(nullptr)
|
|
, offsetcodei(nullptr)
|
|
, firstcoder(nullptr)
|
|
, secondcoder(nullptr)
|
|
, offsetcoder(nullptr)
|
|
{
|
|
}
|
|
|
|
StuffIt13Decompressor::~StuffIt13Decompressor()
|
|
{
|
|
delete firstcodei;
|
|
delete secondcodei;
|
|
delete offsetcodei;
|
|
}
|
|
|
|
bool StuffIt13Decompressor::resetLZSSHandle()
|
|
{
|
|
delete firstcodei;
|
|
delete secondcodei;
|
|
delete offsetcodei;
|
|
firstcodei = secondcodei = offsetcodei = nullptr;
|
|
firstcoder = secondcoder = offsetcoder = nullptr;
|
|
|
|
int val;
|
|
if (!CSInputNextByte(input, val))
|
|
return false;
|
|
|
|
int code = val >> 4;
|
|
|
|
if (code == 0)
|
|
{
|
|
XADPrefixCode *metacode = XADPrefixCode::prefixCode();
|
|
for (int i = 0; i < 37; i++)
|
|
metacode->addValueLowBitFirst(i, MetaCodes[i], MetaCodeLengths[i]);
|
|
|
|
firstcodei = firstcoder = this->allocAndParseCodeOfSize(321, metacode);
|
|
if (val & 0x08)
|
|
secondcoder = firstcoder;
|
|
else
|
|
secondcodei = secondcoder = this->allocAndParseCodeOfSize(321, metacode);
|
|
|
|
offsetcodei = offsetcoder = this->allocAndParseCodeOfSize((val & 0x07) + 10, metacode);
|
|
}
|
|
else if (code < 6)
|
|
{
|
|
firstcoder = firstcodei = XADPrefixCode::prefixCodeWithLengths(FirstCodeLengths[code - 1], 321, 32, true);
|
|
secondcoder = secondcodei = XADPrefixCode::prefixCodeWithLengths(SecondCodeLengths[code - 1], 321, 32, true);
|
|
offsetcoder = offsetcodei = XADPrefixCode::prefixCodeWithLengths(OffsetCodeLengths[code - 1], OffsetCodeSize[code - 1], 32, true);
|
|
}
|
|
else
|
|
return false;
|
|
|
|
currcode = firstcoder;
|
|
|
|
return true;
|
|
}
|
|
|
|
XADPrefixCode *StuffIt13Decompressor::allocAndParseCodeOfSize(int numcodes, XADPrefixCode *metacode)
|
|
{
|
|
int length = 0;
|
|
std::vector<int> lengths;
|
|
lengths.resize(numcodes);
|
|
|
|
for (int i = 0; i < numcodes; i++)
|
|
{
|
|
int val;
|
|
if (!CSInputNextSymbolUsingCodeLE(input, metacode, val))
|
|
return nullptr;
|
|
|
|
switch (val)
|
|
{
|
|
case 31: length = -1; break;
|
|
case 32: length++; break;
|
|
case 33: length--; break;
|
|
case 34:
|
|
{
|
|
unsigned int bit;
|
|
if (!CSInputNextBitLE(input, bit))
|
|
return nullptr;
|
|
|
|
if (bit)
|
|
lengths[i++] = length;
|
|
}
|
|
break;
|
|
case 35:
|
|
{
|
|
unsigned int bits;
|
|
if (!CSInputNextBitStringLE(input, 3, bits))
|
|
return nullptr;
|
|
|
|
val = bits + 2;
|
|
while (val--)
|
|
lengths[i++] = length;
|
|
}
|
|
break;
|
|
case 36:
|
|
{
|
|
unsigned int bits;
|
|
if (!CSInputNextBitStringLE(input, 6, bits))
|
|
return nullptr;
|
|
|
|
val = bits + 10;
|
|
while (val--)
|
|
lengths[i++] = length;
|
|
}
|
|
break;
|
|
default:
|
|
length = val + 1;
|
|
break;
|
|
}
|
|
lengths[i] = length;
|
|
}
|
|
|
|
return XADPrefixCode::prefixCodeWithLengths(lengths.data(), numcodes, 32, true);
|
|
}
|
|
|
|
bool StuffIt13Decompressor::nextLiteralOrOffset(int *offset, int *length, int &result)
|
|
{
|
|
int val;
|
|
|
|
if (!CSInputNextSymbolUsingCodeLE(input, currcode, val))
|
|
return false;
|
|
|
|
if (val < 0x100)
|
|
{
|
|
currcode = firstcoder;
|
|
result = val;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
currcode = secondcoder;
|
|
|
|
if (val < 0x13e)
|
|
*length = val - 0x100 + 3;
|
|
else if (val == 0x13e)
|
|
{
|
|
unsigned int bits;
|
|
if (!CSInputNextBitStringLE(input, 10, bits))
|
|
return false;
|
|
*length = bits + 65;
|
|
}
|
|
else if (val == 0x13f)
|
|
{
|
|
unsigned int bits;
|
|
if (!CSInputNextBitStringLE(input, 15, bits))
|
|
return false;
|
|
*length = bits + 65;
|
|
}
|
|
else
|
|
{
|
|
result = XADLZSSEnd;
|
|
return true;
|
|
}
|
|
|
|
int bitlength;
|
|
if (!CSInputNextSymbolUsingCodeLE(input, offsetcoder, bitlength))
|
|
return false;
|
|
|
|
if (bitlength == 0)
|
|
*offset = 1;
|
|
else if (bitlength == 1)
|
|
*offset = 2;
|
|
else
|
|
{
|
|
unsigned int bits;
|
|
if (!CSInputNextBitStringLE(input, bitlength - 1, bits))
|
|
return false;
|
|
*offset = (1 << (bitlength - 1)) + bits + 1;
|
|
}
|
|
|
|
result = XADLZSSMatch;
|
|
return true;
|
|
}
|
|
}
|
|
|