sustaining_gazes/lib/local/CamCom/comet/uuid_fwd.h

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2016-05-20 22:48:43 +02:00
/** \file
* uuid wrapper class.
*/
/*
* Copyright <EFBFBD> 2001, 2002 Sofus Mortensen
* Copyright <EFBFBD> 2013 Alexander Lamaison
*
* This material is provided "as is", with absolutely no warranty
* expressed or implied. Any use is at your own risk. Permission to
* use or copy this software for any purpose is hereby granted without
* fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is
* granted, provided the above notices are retained, and a notice that
* the code was modified is included with the above copyright notice.
*
* This header is part of Comet version 2.
* https://github.com/alamaison/comet
*/
#ifndef COMET_UUID_FWD_H
#define COMET_UUID_FWD_H
#include <comet/config.h>
#include <comet/tstring.h>
#include <rpc.h>
#include <string>
#include <algorithm>
#include <iostream>
#include <ostream>
namespace comet{
/*! \addtogroup COMType
*/
//@{
/// UUID wrapper.
class uuid_t : public COMET_GUID_BASE
{
struct unitialized_t {};
uuid_t(unitialized_t) {}
friend class bstr_t;
public:
/// Default constructor - constructs a nil uuid.
uuid_t()
{
UuidCreateNil(this);
}
/// Copy constructor
uuid_t(const COMET_GUID_BASE& u)
{
memcpy(this, &u, sizeof(COMET_GUID_BASE));
}
/// Assignment operator
uuid_t& operator=(const COMET_GUID_BASE& u)
{
memcpy(this, &u, sizeof(COMET_GUID_BASE));
return *this;
}
/// \name Construct uuid from string
//@{
explicit uuid_t(const std::string& s)
{
if (!init_from_str(s.c_str(), s.length()))
throw std::runtime_error(err_msg());
}
explicit uuid_t(const char* s)
{
if (!init_from_str(s, strlen(s)))
throw std::runtime_error(err_msg());
}
explicit uuid_t(const std::wstring& s)
{
if (!init_from_str(s.c_str(), s.length()))
throw std::runtime_error(err_msg());
}
explicit uuid_t(const wchar_t* s)
{
if (!init_from_str(s, wcslen(s)))
throw std::runtime_error(err_msg());
}
explicit uuid_t(const bstr_t& bs);
//@}
//! Generate new guid.
static uuid_t create()
{
unitialized_t x;
uuid_t g(x);
UuidCreate(&g);
return g;
}
//! Set to nil uuid.
void clear()
{
UuidCreateNil(this);
}
//! Returns hash of uuid
unsigned short hash() const
{
RPC_STATUS status;
unsigned short r = UuidHash(const_cast<uuid_t*>(this), &status);
if (status != RPC_S_OK)
throw std::runtime_error("uuid_t::hash - UuidHash failed.");
return r;
}
//! Convert uuid to string
//@{
/// Return a std::string version of the uuid.
std::string str() const
{
std::string r;
r.resize(36);
copy_to_str(&r[0]);
return r;
}
/// Return a std::string version of the uuid.
inline std::string s_str() const
{
return str();
}
/// Return a std::wstring version of the uuid.
std::wstring w_str() const
{
std::wstring r;
r.resize(36);
copy_to_str(&r[0]);
return r;
}
/// Return a tstring (templated to TCHAR) version of the uuid.
tstring t_str() const
{
tstring r;
r.resize(36);
copy_to_str(&r[0]);
return r;
}
//@}
/// Returns true if and only if uuid is nil.
bool is_null() const throw()
{
return ((PLONG) this)[0] == 0 &&
((PLONG) this)[1] == 0 &&
((PLONG) this)[2] == 0 &&
((PLONG) this)[3] == 0;
}
//! Returns true if and only if uuid is nil
bool operator!() const throw()
{
return is_null();
}
/// Output to an ostream.
template<class E, class TR>
friend inline std::basic_ostream<E, TR>& operator<<(std::basic_ostream<E, TR>& os, const uuid_t& u);
/// Input from an ostream
template<class E, class TR>
friend inline std::basic_istream<E, TR>& operator>>(std::basic_istream<E, TR>& is, uuid_t& u);
/** \internal
*/
class bool_tester
{ void operator delete(void*); };
/// Copy the uuid_t to a string/container.
template<typename C> void copy_to_str(C s[]) const throw();
/// Initialise the uuid_t from a string/container.
template<typename C> bool init_from_str(const C s[], size_t len) throw();
static const int* uuid_table()
{
static const int table[] = { 3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1, 8, 9, -1, 10, 11, 12, 13, 14, 15 };
return table;
}
static const char* hex_table()
{
static const char hex[] = "0123456789abcdef";
return hex;
}
static const char* err_msg()
{
static const char msg[] = "uuid_t: invalid format";
return msg;
}
static int parse_nibble(int c)
{
return c >= 'A' ? (c|0x20) - 'a' + 10 : c - '0';
}
/// Compare two guids.
inline long cmp(const comet::uuid_t &rhs) const
{
long i; // The code below may be a bit dense, but it is compact and works.
if((i = (Data1 - rhs.Data1)) == 0 && (i = (Data2 - rhs.Data2)) == 0 && (i = (Data3 - rhs.Data3)) == 0)
(i = ::memcmp(Data4, rhs.Data4, 8));
return i;
}
/// Compare two guids for equality.
inline bool is_equal( const comet::uuid_t &rhs) const
{
// From ATL
return ((PLONG) this)[0] == ((PLONG) &rhs)[0] &&
((PLONG) this)[1] == ((PLONG) &rhs)[1] &&
((PLONG) this)[2] == ((PLONG) &rhs)[2] &&
((PLONG) this)[3] == ((PLONG) &rhs)[3];
}
public:
/**\internal
*/
operator bool_tester*() const throw()
{ if (is_null()) return 0; static bool_tester test; return &test; }
/// Construct const reference to uuid from a raw GUID
static const uuid_t& create_const_reference(const COMET_GUID_BASE& x)
{
return *reinterpret_cast<const uuid_t*>(&x);
}
/// Construct reference to uuid from a raw GUID
static uuid_t& create_reference(COMET_GUID_BASE& x)
{
return *reinterpret_cast<uuid_t*>(&x);
}
//! \name Methods for converting uuid to raw GUID when calling raw COM functions or legacy code.
//@{
COMET_GUID_BASE* out() { return this; }
COMET_GUID_BASE* inout() { return this; }
COMET_GUID_BASE in() const { return *this; }
COMET_GUID_BASE* in_ptr() const { return const_cast<COMET_GUID_BASE*>(static_cast<const COMET_GUID_BASE*>(this)); }
//@}
};
//@}
/// \name comparison operators
//@{
/** Equals operator.
* \relates uuid_t
*/
inline bool operator==(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return lhs.is_equal(rhs);
}
/** Inequality operator.
* \relates uuid_t
*/
inline bool operator!=(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return !lhs.is_equal(rhs);
}
/** Equals operator.
* \relates uuid_t
*/
inline bool operator==(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return lhs.is_equal( comet::uuid_t::create_const_reference(rhs) );
}
/** Inequality operator.
* \relates uuid_t
*/
inline bool operator!=(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return !lhs.is_equal( comet::uuid_t::create_const_reference(rhs) );
}
/** Equals operator.
* \relates uuid_t
*/
inline bool operator==(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return comet::uuid_t::create_const_reference(lhs).is_equal(rhs);
}
/** Inequality operator.
* \relates uuid_t
*/
inline bool operator!=(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return !comet::uuid_t::create_const_reference(lhs).is_equal(rhs);
}
/** Less-than operator.
* \relates uuid_t
*/
inline bool operator<(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return lhs.cmp(rhs)<0;
}
/** Less-than operator.
* \relates uuid_t
*/
inline bool operator<(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return lhs.cmp(comet::uuid_t::create_const_reference(rhs))<0;
}
/** Less-than operator.
* \relates uuid_t
*/
inline bool operator<(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return comet::uuid_t::create_const_reference(lhs).cmp(rhs)<0;
}
/** Greater-than-equals operator.
* \relates uuid_t
*/
inline bool operator>=(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return lhs.cmp(rhs)>=0;
}
/** Greater-than-equals operator.
* \relates uuid_t
*/
inline bool operator>=(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return lhs.cmp(comet::uuid_t::create_const_reference(rhs))>=0;
}
/** Greater-than-equals operator.
* \relates uuid_t
*/
inline bool operator>=(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return comet::uuid_t::create_const_reference(lhs).cmp(rhs)>=0;
}
/** Greater-than operator.
* \relates uuid_t
*/
inline bool operator>(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return lhs.cmp(rhs)>0;
}
/** Greater-than operator.
* \relates uuid_t
*/
inline bool operator>(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return lhs.cmp(comet::uuid_t::create_const_reference(rhs))>0;
}
/** Greater-than operator.
* \relates uuid_t
*/
inline bool operator>(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return comet::uuid_t::create_const_reference(lhs).cmp(rhs)>0;
}
/** Less-than-equals operator.
* \relates uuid_t
*/
inline bool operator<=(const comet::uuid_t& lhs, const comet::uuid_t& rhs)
{
return lhs.cmp(rhs)<=0;
}
/** Less-than-equals operator.
* \relates uuid_t
*/
inline bool operator<=(const comet::uuid_t& lhs, const COMET_GUID_BASE& rhs)
{
return lhs.cmp(comet::uuid_t::create_const_reference(rhs))<=0;
}
/** Less-than-equals operator.
* \relates uuid_t
*/
inline bool operator<=(const COMET_GUID_BASE& lhs, const comet::uuid_t& rhs)
{
return comet::uuid_t::create_const_reference(lhs).cmp(rhs)<=0;
}
//@}
/// \name overloads for output/input to/from streams
/// @{
/** Output to an ostream.
* \relates uuid_t
*/
template<class E, class TR>
inline std::basic_ostream<E, TR>& operator<<(std::basic_ostream<E, TR>& os, const comet::uuid_t& u)
{
E buf[36];
u.copy_to_str(buf);
os.write(buf, 36);
return os;
}
/** Input from an istream.
* \relates uuid_t
*/
template<class E, class TR>
inline std::basic_istream<E, TR>& operator>>(std::basic_istream<E, TR>& is, comet::uuid_t& u)
{
typename std::basic_istream<E,TR>::sentry se(is);
if (se)
{
E buf[36];
is.read(buf, 36);
if (!u.init_from_str(buf, is.gcount()))
is.setstate(std::ios::badbit);
}
return is;
}
//@}
} // namespace comet
#endif