+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file guid.cpp
-** \brief Template File
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-** Copyright (c) 2007, 2008 Chris Moore
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-** General Public License for more details.
-** \endlegal
-*/
-/* ========================================================================= */
-
-/* === H E A D E R S ======================================================= */
-
-#ifdef USING_PCH
-# include "pch.h"
-#else
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "guid.h"
-#include "quick_rng.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <ETL/stringf>
-#include <functional>
-
-#ifdef _DEBUG
-#include "general.h"
-#endif
-
-#ifdef HASH_MAP_H
-#include HASH_MAP_H
-#include FUNCTIONAL_H
-#endif
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#endif
-
-/* === U S I N G =========================================================== */
-
-using namespace std;
-using namespace etl;
-using namespace synfig;
-
-/* === M A C R O S ========================================================= */
-
-#define MANUAL_GUID_CALC
-
-/* === G L O B A L S ======================================================= */
-
-/* === P R O C E D U R E S ================================================= */
-
-/* === M E T H O D S ======================================================= */
-
-#define GUID_RNG quick_rng
-//#define GUID_RNG subtractive_rng
-
-
-
-#ifdef MANUAL_GUID_CALC
-#include <time.h>
-static GUID_RNG _a, _b;
-static void _set_up_rand_long_long(uint64_t &x);
-static void _get_rand_long_long(uint64_t &x);
-static void (*get_rand_long_long)(uint64_t&)=_set_up_rand_long_long;
-static void _set_up_rand_long_long(uint64_t &x)
-{
-#ifdef _DEBUG
- // synfig::info("Starting up GUID system...");
-#endif
- _a=GUID_RNG(time(0)+clock());
- _b=GUID_RNG(clock());
- get_rand_long_long=_get_rand_long_long;
- _get_rand_long_long(x);
-}
-
-static void _get_rand_long_long(uint64_t &x)
-{
- //subtractive_rng _c(clock());
- unsigned short* data(reinterpret_cast<unsigned short *>(&x));
- data[0]=_a(65536);
- data[1]=_a(65536);
- data[2]=_a(65536);
- data[3]=_a(65536);
-}
-
-#else
-// Use OS-Dependent method
-
-#ifdef _WIN32
-// Win32
-static void get_rand_long_long(uint64_t &x)
-{
- _GUID* guid(reinterpret_cast<_GUID*>(&x));
- CoCreateGuid(guid);
-}
-
-#else
-// Unix
-static int rand_fd;
-static void _set_up_rand_long_long(uint64_t &x);
-static void _get_rand_long_long(uint64_t &x);
-static void (*get_rand_long_long)(uint64_t&)=_set_up_rand_long_long;
-static void _set_up_rand_long_long(uint64_t &x)
-{
-#ifdef _DEBUG
- // synfig::info("Starting up GUID system...");
-#endif
- rand_fd=open("/dev/urandom",O_RDONLY);
- get_rand_long_long=_get_rand_long_long;
- _get_rand_long_long(x);
-}
-
-static void _get_rand_long_long(uint64_t &x){ read(rand_fd,&x,sizeof(x));}
-
-#endif
-#endif
-
-
-
-void
-synfig::GUID::make_unique()
-{
- get_rand_long_long(data.u_64.a);
- get_rand_long_long(data.u_64.b);
-}
-
-synfig::GUID
-synfig::GUID::hasher(const String& str)
-{
-#ifdef HASH_MAP_H
- /* http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1456.html says:
- *
- * "Some earlier hash table implementations gave char* special
- * treatment: it specialized the default hash function to look
- * at character array being pointed to, rather than the pointer
- * itself. This proposal removes that special treatment."
- *
- * Unfortunately, the older implementation doesn't seem to want to
- * accept Strings, so we're left with this conditional compilation.
- */
-# ifdef FUNCTIONAL_HASH_ON_STRING
- HASH_MAP_NAMESPACE::hash<String> string_hash_;
- const unsigned int seed(string_hash_(str));
-# else // FUNCTIONAL_HASH_ON_STRING
- HASH_MAP_NAMESPACE::hash<const char*> string_hash_;
- const unsigned int seed(string_hash_(str.c_str()));
-# endif // FUNCTIONAL_HASH_ON_STRING
-#else // HASH_MAP_H
- unsigned int seed(0x3B642879);
- for(unsigned int i=0;i<str.size();i++)
- {
- seed^=(seed*str[i])*i;
- seed=(seed>>(32-(i%24)))^(seed<<(i%24));
- }
-#endif // HASH_MAP_H
-
- GUID_RNG random(seed);
- GUID ret(0);
- ret.data.u_32.a=random(~(unsigned int)0);
- ret.data.u_32.b=random(~(unsigned int)0);
- ret.data.u_32.c=random(~(unsigned int)0);
- ret.data.u_32.d=random(~(unsigned int)0);
- return ret;
-}
-
-synfig::GUID
-synfig::GUID::hasher(int i)
-{
- GUID ret(0);
- GUID_RNG random(i);
- ret.data.u_32.a=random(~(unsigned int)0);
- ret.data.u_32.b=random(~(unsigned int)0);
- ret.data.u_32.c=random(~(unsigned int)0);
- ret.data.u_32.d=random(~(unsigned int)0);
- return ret;
-}
-
-String
-synfig::GUID::get_string()const
-{
- return strprintf("%08X%08X%08X%08X",data.u_32.a,data.u_32.b,data.u_32.c,data.u_32.d);
-}
-
-synfig::GUID::GUID(const String &str)
-{
- strscanf(str,"%08X%08X%08X%08X",&data.u_32.a,&data.u_32.b,&data.u_32.c,&data.u_32.d);
-}
projects / synfig.git / blobdiff