mirror of
https://github.com/RetroShare/RetroShare.git
synced 2025-01-24 14:23:36 -05:00
2b20ab7fca
git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5429 b45a01b8-16f6-495d-af2f-9b41ad6348cc
123 lines
3.5 KiB
C++
123 lines
3.5 KiB
C++
// This class aims at defining a generic ID type that is a list of bytes. It
|
|
// can be converted into a hexadecial string for printing, mainly) or for
|
|
// compatibility with old methods.
|
|
//
|
|
// To use this class, derive your own ID type from it. Examples include:
|
|
//
|
|
// class PGPIdType: public t_RsGenericIdType<8>
|
|
// {
|
|
// [..]
|
|
// };
|
|
//
|
|
// class PGPFingerprintType: public t_RsGenericIdType<20>
|
|
// {
|
|
// [..]
|
|
// };
|
|
//
|
|
// With this, there is no implicit conversion between subtypes, and therefore ID mixup
|
|
// is impossible.
|
|
//
|
|
// A simpler way to make ID types is to
|
|
// typedef t_RsGenericIdType<MySize> MyType ;
|
|
//
|
|
// ID Types with different lengths will be incompatible on compilation.
|
|
//
|
|
// Warning: never store references to a t_RsGenericIdType accross threads, since the
|
|
// cached string convertion is not thread safe.
|
|
//
|
|
#pragma once
|
|
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <stdint.h>
|
|
|
|
template<uint32_t ID_SIZE_IN_BYTES> class t_RsGenericIdType
|
|
{
|
|
public:
|
|
t_RsGenericIdType() { memset(bytes,0,ID_SIZE_IN_BYTES) ;}
|
|
virtual ~t_RsGenericIdType() {}
|
|
|
|
// Explicit constructor from a hexadecimal string
|
|
//
|
|
explicit t_RsGenericIdType(const std::string& hex_string) ;
|
|
|
|
// Explicit constructor from a byte array. The array should have size at least ID_SIZE_IN_BYTES
|
|
//
|
|
explicit t_RsGenericIdType(const unsigned char bytes[]) ;
|
|
|
|
// Converts to a std::string using cached value.
|
|
//
|
|
std::string toStdString(bool upper_case = true) const ;
|
|
const unsigned char *toByteArray() const { return &bytes[0] ; }
|
|
static const uint32_t SIZE_IN_BYTES = ID_SIZE_IN_BYTES ;
|
|
|
|
bool operator==(const t_RsGenericIdType<ID_SIZE_IN_BYTES>& fp) const
|
|
{
|
|
for(uint32_t i=0;i<ID_SIZE_IN_BYTES;++i)
|
|
if(fp.bytes[i] != bytes[i])
|
|
return false ;
|
|
return true ;
|
|
}
|
|
bool operator!=(const t_RsGenericIdType<ID_SIZE_IN_BYTES>& fp) const
|
|
{
|
|
return !operator==(fp) ;
|
|
}
|
|
|
|
private:
|
|
unsigned char bytes[ID_SIZE_IN_BYTES] ;
|
|
};
|
|
|
|
template<uint32_t ID_SIZE_IN_BYTES> std::string t_RsGenericIdType<ID_SIZE_IN_BYTES>::toStdString(bool upper_case) const
|
|
{
|
|
static const char outh[16] = { '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' } ;
|
|
static const char outl[16] = { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' } ;
|
|
|
|
std::string res(ID_SIZE_IN_BYTES*2,' ') ;
|
|
|
|
for(uint32_t j = 0; j < ID_SIZE_IN_BYTES; j++)
|
|
if(upper_case)
|
|
{
|
|
res[2*j ] = outh[ (bytes[j]>>4) ] ;
|
|
res[2*j+1] = outh[ bytes[j] & 0xf ] ;
|
|
}
|
|
else
|
|
{
|
|
res[2*j ] = outl[ (bytes[j]>>4) ] ;
|
|
res[2*j+1] = outl[ bytes[j] & 0xf ] ;
|
|
}
|
|
|
|
return res ;
|
|
}
|
|
|
|
template<uint32_t ID_SIZE_IN_BYTES> t_RsGenericIdType<ID_SIZE_IN_BYTES>::t_RsGenericIdType(const std::string& s)
|
|
{
|
|
int n=0;
|
|
if(s.length() != ID_SIZE_IN_BYTES*2)
|
|
throw std::runtime_error("t_RsGenericIdType<>::t_RsGenericIdType(std::string&): supplied string in constructor has wrong size.") ;
|
|
|
|
for(uint32_t i = 0; i < ID_SIZE_IN_BYTES; ++i)
|
|
{
|
|
bytes[i] = 0 ;
|
|
|
|
for(int k=0;k<2;++k)
|
|
{
|
|
char b = s[n++] ;
|
|
|
|
if(b >= 'A' && b <= 'F')
|
|
bytes[i] += (b-'A'+10) << 4*(1-k) ;
|
|
else if(b >= 'a' && b <= 'f')
|
|
bytes[i] += (b-'a'+10) << 4*(1-k) ;
|
|
else if(b >= '0' && b <= '9')
|
|
bytes[i] += (b-'0') << 4*(1-k) ;
|
|
else
|
|
throw std::runtime_error("t_RsGenericIdType<>::t_RsGenericIdType(std::string&): supplied string is not purely hexadecimal") ;
|
|
}
|
|
}
|
|
}
|
|
|
|
template<uint32_t ID_SIZE_IN_BYTES> t_RsGenericIdType<ID_SIZE_IN_BYTES>::t_RsGenericIdType(const unsigned char *mem)
|
|
{
|
|
memcpy(bytes,mem,ID_SIZE_IN_BYTES) ;
|
|
}
|
|
|