int8_t OCSeedRandom()
{
#if defined(__ANDROID__) || defined(__linux__) || defined(__APPLE__) || defined(__TIZEN__)
// Get current time to Seed.
uint64_t currentTime = 0;
#ifdef __ANDROID__
struct timespec getTs;
clock_gettime(CLOCK_MONOTONIC, &getTs);
currentTime = (getTs.tv_sec * (uint64_t)1000000000 + getTs.tv_nsec)/1000;
#elif _POSIX_TIMERS > 0
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
currentTime = ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
currentTime = tv.tv_sec * 1000000 + tv.tv_usec;
#endif
int32_t fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0)
{
uint32_t randomSeed = 0;
uint32_t totalRead = 0; //how many integers were read
int32_t currentRead = 0;
while (totalRead < sizeof(randomSeed))
{
currentRead = read(fd, (uint8_t*) &randomSeed + totalRead,
sizeof(randomSeed) - totalRead);
if (currentRead > 0)
{
totalRead += currentRead;
}
}
close(fd);
srand(randomSeed | currentTime);
}
else
{
// Do time based seed when problem in accessing "/dev/urandom"
srand(currentTime);
}
return 0;
#elif defined ARDUINO
uint32_t result =0;
uint8_t i;
for (i=32; i--;)
{
result += result + GetRandomBit();
}
randomSeed(result);
return 0;
#endif
}
int8_t OCSeedRandom()
{
#ifndef ARDUINO
// Get current time to Seed.
uint64_t currentTime = 0;
#ifdef __ANDROID__
struct timespec getTs;
clock_gettime(CLOCK_MONOTONIC, &getTs);
currentTime = (getTs.tv_sec * (uint64_t)NANO_SEC + getTs.tv_nsec)/1000;
#elif _WIN32
LARGE_INTEGER count;
if (QueryPerformanceCounter(&count)) {
currentTime = count.QuadPart;
}
#elif _POSIX_TIMERS > 0
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
currentTime = (ts.tv_sec * (uint64_t)NANO_SEC + ts.tv_nsec)/ 1000;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
currentTime = tv.tv_sec * (uint64_t)1000000 + tv.tv_usec;
#endif
#if defined(__unix__) || defined(__APPLE__)
int32_t fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0)
{
uint32_t randomSeed = 0;
uint32_t totalRead = 0; //how many integers were read
int32_t currentRead = 0;
while (totalRead < sizeof(randomSeed))
{
currentRead = read(fd, (uint8_t*) &randomSeed + totalRead,
sizeof(randomSeed) - totalRead);
if (currentRead > 0)
{
totalRead += currentRead;
}
}
close(fd);
srand(randomSeed | currentTime);
}
else
#endif
{
// Do time based seed when problem in accessing "/dev/urandom"
srand(currentTime);
}
return 0;
#elif defined ARDUINO
uint32_t result =0;
uint8_t i;
for (i=32; i--;)
{
result += result + GetRandomBit();
}
#if HAVE_SRANDOM
srandom(result);
#else
srand(result);
#endif
return 0;
#endif
}
