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#ifndef SEARCH_H
#define SEARCH_H
#include "util.h"
#include <list>
#include <map>
#include <vector>
#include <cstring>
class Hasher {
public:
struct Hash {
uint8 digest[16];
bool operator==(const Hash &r) const {
return !std::memcmp(digest, r.digest, sizeof(digest));
}
bool operator<(const Hash &r) const {
return std::memcmp(digest, r.digest, sizeof(digest)) < 0;
}
};
static Hash createHash(const byte *data, uint32 size);
};
struct SearchData {
uint32 size;
uint32 byteSum;
Hasher::Hash hash;
bool operator==(const SearchData &r) const {
return (size == r.size && byteSum == r.byteSum && hash == r.hash);
}
bool operator<(const SearchData &r) const {
return (size < r.size && byteSum < r.byteSum && hash < r.hash);
}
};
class SearchCreator {
public:
static SearchData create(const char *filename);
static SearchData create(const byte *buffer, uint32 size);
};
class SumCreator {
public:
typedef std::list<uint32> InputList;
typedef std::vector<byte> DataInput;
SumCreator(InputList list, const DataInput &input);
bool nextByte();
uint32 getOffset() const { return _curOffset; }
bool hasSum(uint32 size) const;
uint32 getSum(uint32 size) const;
private:
uint32 _curOffset;
DataInput _input;
typedef std::map<uint32, uint32> SumMap;
SumMap _sums;
typedef std::map<uint32, uint> SumCount;
SumCount _sumCount;
};
class Search {
public:
Search(const char *filename);
Search(const byte *data, uint32 size);
void addData(SearchData data);
struct ResultData {
SearchData data;
uint32 offset;
ResultData() : data(), offset() {}
ResultData(SearchData d, uint32 o) : data(d), offset(o) {}
};
typedef std::list<ResultData> ResultList;
bool search(ResultList &res);
private:
SumCreator::DataInput _data;
typedef std::list<SearchData> SearchList;
SearchList _search;
};
#endif
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