raze-gles/source/common/filesystem/ancientzip.h

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C
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#include <stdexcept>
#include "files.h"
//#include "doomerrors.h"
class FZipExploder
{
unsigned int Hold, Bits;
FileReader *In;
unsigned int InLeft;
/****************************************************************
Shannon-Fano tree structures, variables and related routines
****************************************************************/
struct HuffNode
{
unsigned char Value;
unsigned char Length;
unsigned short ChildTable;
};
struct TableBuilder
{
unsigned char Value;
unsigned char Length;
unsigned short Code;
};
TArray<HuffNode> LiteralDecoder;
TArray<HuffNode> DistanceDecoder;
TArray<HuffNode> LengthDecoder;
unsigned char ReadBuf[256];
unsigned int bs, be;
static int buildercmp(const void *a, const void *b);
void InsertCode(TArray<HuffNode> &decoder, unsigned int pos, int bits, unsigned short code, int len, unsigned char value);
unsigned int InitTable(TArray<HuffNode> &decoder, int numspots);
int BuildDecoder(TArray<HuffNode> &decoder, TableBuilder *values, int numvals);
int DecodeSFValue(const TArray<HuffNode> &currentTree);
int DecodeSF(TArray<HuffNode> &decoder, int numvals);
public:
int Explode(unsigned char *out, unsigned int outsize, FileReader &in, unsigned int insize, int flags);
};
class CExplosionError : std::runtime_error
{
public:
CExplosionError(const char *message) : std::runtime_error(message) {}
};
int ShrinkLoop(unsigned char *out, unsigned int outsize, FileReader &in, unsigned int insize);