wxString
wxPdfUtility::GetUniqueId(const wxString& prefix)
{
wxString uid = (prefix.Length() <= 114) ? prefix : prefix.Left(114);
wxDateTime ts;
ts.SetToCurrent();
int q;
int z;
if (!ms_seeded)
{
ms_seeded = true;
ms_s1 = ts.GetSecond() ^ (~ts.GetMillisecond());
if (ms_s1 == 0) ms_s1 = 1;
ms_s2 = wxGetProcessId();
}
MODMULT(53668, 40014, 12211, 2147483563L, ms_s1);
MODMULT(52774, 40692, 3791, 2147483399L, ms_s2);
z = ms_s1 - ms_s2;
if (z < 1)
{
z += 2147483562;
}
uid += wxString::Format(wxT("%08x%05x"), ts.GetSecond(), ts.GetMillisecond());
uid += Double2String(z * 4.656613e-9,8);
return uid;
}
//--------------------------------------------------------------------
// LCG Zufallszahlengenerator
// aus Bruce Schneier, Cryptographic Algorithms
//--------------------------------------------------------------------
// LCG Zufallszahlengenerator
double randLCG(void)
{
long q, z;
MODMULT(53668, 40014, 12211, 2147483563L, s1)
MODMULT(52774, 40692, 3791, 2147483399L, s2)
z = s1 - s2;
if (z < 1)
z += 2147483562;
return z * 4.656613e-10;
}
PHPAPI double php_combined_lcg(TSRMLS_D) /* {{{ */
{
php_int32 q;
php_int32 z;
if (!LCG(seeded)) {
lcg_seed(TSRMLS_C);
}
MODMULT(53668, 40014, 12211, 2147483563L, LCG(s1));
MODMULT(52774, 40692, 3791, 2147483399L, LCG(s2));
z = LCG(s1) - LCG(s2);
if (z < 1) {
z += 2147483562;
}
return z * 4.656613e-10;
}