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#include "UnityPrefix.h"
#include "GUID.h"
#include "LogAssert.h"
#include "StaticAssert.h"
#include <string>
#if UNITY_IPHONE
#include <CoreFoundation/CFUUID.h>
#endif
#if UNITY_WIN
#include <ObjBase.h>
#endif
#if UNITY_XENON
#include <comdecl.h>
#include <time.h>
#endif
using namespace std;
#if UNITY_ANDROID
#include <fcntl.h>
#include <unistd.h>
#elif UNITY_LINUX || UNITY_BB10 || UNITY_TIZEN
#include <fcntl.h>
#include <sys/time.h>
#endif
#if UNITY_PS3
#include <sys/random_number.h>
#endif
#if UNITY_HAVE_GUID_INIT
void UnityGUID::Init ()
{
#if UNITY_OSX || UNITY_IPHONE
CompileTimeAssert (sizeof (CFUUIDBytes) == 16, "GIUD shoud be 16 bytes");
#elif UNITY_WIN || UNITY_XENON
CompileTimeAssert (sizeof (GUID) == 16, "GIUD shoud be 16 bytes");
#endif
#if UNITY_OSX || UNITY_IPHONE
CFUUIDRef myUUID;
myUUID = CFUUIDCreate (kCFAllocatorDefault);
CFUUIDBytes bytes = CFUUIDGetUUIDBytes (myUUID);
memcpy (data, &bytes, sizeof (CFUUIDBytes));
CFRelease (myUUID);
#elif UNITY_ANDROID || UNITY_LINUX || UNITY_BB10 || UNITY_TIZEN
#pragma message("Android GUID/UUID creation NOT tested!")
{
unsigned char bytes[16];
struct timeval tv ;
gettimeofday(&tv, 0) ;
int fd = open("/dev/urandom", O_RDONLY);
if (fd == -1)
fd = open("/dev/random", O_RDONLY | O_NONBLOCK) ;
srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec) ;
// Crank the random number generator a few times
gettimeofday(&tv, 0) ;
for (int i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--) rand() ;
int n = 16 ;
int lose_counter = 0 ;
unsigned char *cp = (unsigned char *) bytes ;
while (n > 0 && fd != -1)
{
int i = read(fd, cp, n) ;
if (i <= 0)
{
if (lose_counter++ > 16) break ;
continue ;
}
n -= i ;
cp += i ;
lose_counter = 0 ;
}
if (fd != -1)
close(fd);
// We do this all the time, but this is the only source of
// randomness if /dev/random/urandom is out to lunch.
for (unsigned int i = 0; i<16; ++i)
bytes[i] ^= (rand() >> 7) & 0xFF ;
// clock_seq is bytes #8 and #9
uint16_t clock_seq = (uint16_t(bytes[8]) << 8) + bytes[9] ;
clock_seq = (clock_seq & 0x3FFF) | 0x8000 ;
bytes[8] = clock_seq >> 8 ;
bytes[9] = clock_seq & 0xFF ;
// time_hi_and_version is bytes #6 and #7
uint16_t time_hi_and_version = (uint16_t(bytes[6]) << 8) + bytes[7] ;
time_hi_and_version = (time_hi_and_version & 0x0FFF) | 0x4000 ;
bytes[6] = time_hi_and_version >> 8 ;
bytes[7] = time_hi_and_version & 0xFF ;
memcpy (data, &bytes, sizeof (data));
}
#elif UNITY_WIN
GUID guid;
::CoCreateGuid( &guid );
memcpy( data, &guid, sizeof(guid) );
#elif UNITY_PS3
sys_get_random_number( &data, sizeof(UnityGUID) );
#elif UNITY_XENON
// RFC 4122, section 4.4 (Algorithms for Creating a UUID from Truly Random or Pseudo-Random Numbers)
// http://www.ietf.org/rfc/rfc4122.txt
GUID guid;
unsigned char* bytes = (unsigned char*)&guid;
srand( time(NULL) );
for (unsigned int i = 0; i<16; ++i)
bytes[i] ^= (rand() >> 7) & 0xFF;
// V4
guid.Data3 &= 0x0fff;
guid.Data3 |= (4 << 12);
guid.Data4[0] &= 0x3f;
guid.Data4[0] |= 0x80;
memcpy( data, &guid, sizeof(guid) );
#else
ErrorString("GUID::Init() not implemented.");
#endif
}
#endif
bool CompareGUIDStringLess (const UnityGUID& lhsGUID, const UnityGUID& rhsGUID)
{
char lhs[32];
char rhs[32];
GUIDToString(lhsGUID, lhs);
GUIDToString(rhsGUID, rhs);
for (int i=0;i<32;i++)
{
if (lhs[i] != rhs[i])
return lhs[i] < rhs[i];
}
return false;
}
const char kHexToLiteral[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
string GUIDToString(const UnityGUID& guid)
{
char name[kGUIDStringLength+1];
GUIDToString (guid, name);
name[kGUIDStringLength] = '\0';
return name;
}
void GUIDToString(const UnityGUID& guid, char* name)
{
for (int i=0;i<4;i++)
{
for (int j=8;j--;)
{
UInt32 cur = guid.data[i];
cur >>= (j * 4);
cur &= 0xF;
name[i * 8 + j] = kHexToLiteral[cur];
}
}
}
UnityGUID StringToGUID (const std::string& guidString)
{
return StringToGUID(guidString.c_str(), guidString.size());
}
UnityGUID StringToGUID (const char* guidString, size_t length)
{
if (length != kGUIDStringLength)
return UnityGUID ();
// Initialize hex char to int table
static char s_LiteralToHex[255];
static bool s_IsInitialized = false;
if (!s_IsInitialized)
{
for (int i=0;i<255;i++)
s_LiteralToHex[i] = -1;
s_LiteralToHex['0'] = 0;
s_LiteralToHex['1'] = 1;
s_LiteralToHex['2'] = 2;
s_LiteralToHex['3'] = 3;
s_LiteralToHex['4'] = 4;
s_LiteralToHex['5'] = 5;
s_LiteralToHex['6'] = 6;
s_LiteralToHex['7'] = 7;
s_LiteralToHex['8'] = 8;
s_LiteralToHex['9'] = 9;
s_LiteralToHex['a'] = 10;
s_LiteralToHex['b'] = 11;
s_LiteralToHex['c'] = 12;
s_LiteralToHex['d'] = 13;
s_LiteralToHex['e'] = 14;
s_LiteralToHex['f'] = 15;
s_IsInitialized = true;
}
// Convert every hex char into an int [0...16]
int hex[kGUIDStringLength];
for (int i=0;i<kGUIDStringLength;i++)
hex[i] = s_LiteralToHex[guidString[i]];
UnityGUID guid;
for (int i=0;i<4;i++)
{
UInt32 cur = 0;
for (int j=8;j--;)
{
int curHex = hex[i * 8 + j];
if (curHex == -1)
return UnityGUID ();
cur |= (curHex << (j * 4));
}
guid.data[i] = cur;
}
return guid;
}
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