/usr/include/apt-pkg/hashsum_template.h is in libapt-pkg-dev 0.8.16~exp12ubuntu10.21.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Description /*{{{*/
// $Id: hashsum_template.h,v 1.3 2001/05/07 05:05:47 jgg Exp $
/* ######################################################################
HashSumValueTemplate - Generic Storage for a hash value
##################################################################### */
/*}}}*/
#ifndef APTPKG_HASHSUM_TEMPLATE_H
#define APTPKG_HASHSUM_TEMPLATE_H
#include <apt-pkg/fileutl.h>
#include <string>
#include <cstring>
#include <algorithm>
#include <stdint.h>
#include <apt-pkg/strutl.h>
#ifndef APT_8_CLEANER_HEADERS
using std::string;
using std::min;
#endif
template<int N>
class HashSumValue
{
unsigned char Sum[N/8];
public:
// Accessors
bool operator ==(const HashSumValue &rhs) const
{
return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0;
};
bool operator !=(const HashSumValue &rhs) const
{
return memcmp(Sum,rhs.Sum,sizeof(Sum)) != 0;
};
std::string Value() const
{
char Conv[16] =
{ '0','1','2','3','4','5','6','7','8','9','a','b',
'c','d','e','f'
};
char Result[((N/8)*2)+1];
Result[(N/8)*2] = 0;
// Convert each char into two letters
int J = 0;
int I = 0;
for (; I != (N/8)*2; J++,I += 2)
{
Result[I] = Conv[Sum[J] >> 4];
Result[I + 1] = Conv[Sum[J] & 0xF];
}
return std::string(Result);
};
inline void Value(unsigned char S[N/8])
{
for (int I = 0; I != sizeof(Sum); I++)
S[I] = Sum[I];
};
inline operator std::string() const
{
return Value();
};
bool Set(std::string Str)
{
return Hex2Num(Str,Sum,sizeof(Sum));
};
inline void Set(unsigned char S[N/8])
{
for (int I = 0; I != sizeof(Sum); I++)
Sum[I] = S[I];
};
HashSumValue(std::string Str)
{
memset(Sum,0,sizeof(Sum));
Set(Str);
}
HashSumValue()
{
memset(Sum,0,sizeof(Sum));
}
};
class SummationImplementation
{
public:
virtual bool Add(const unsigned char *inbuf, unsigned long long inlen) = 0;
inline bool Add(const char *inbuf, unsigned long long const inlen)
{ return Add((unsigned char *)inbuf, inlen); };
inline bool Add(const unsigned char *Data)
{ return Add(Data, strlen((const char *)Data)); };
inline bool Add(const char *Data)
{ return Add((const unsigned char *)Data, strlen((const char *)Data)); };
inline bool Add(const unsigned char *Beg, const unsigned char *End)
{ return Add(Beg, End - Beg); };
inline bool Add(const char *Beg, const char *End)
{ return Add((const unsigned char *)Beg, End - Beg); };
bool AddFD(int Fd, unsigned long long Size = 0);
bool AddFD(FileFd &Fd, unsigned long long Size = 0);
};
#endif
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