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Explicitly cast time value in cmSystemTools::RandomSeed 

Use static_cast to avoid warnings like

 conversion to ‘unsigned int’ from ‘__time_t’ may alter its value
 conversion to ‘unsigned int’ from ‘__suseconds_t’ may alter its value

We do not care if the value is truncated because we are looking for just
32 bits anyway.
This commit is contained in:
Brad King 2011-05-19 07:56:04 -04:00
parent eb6f461fc1
commit 3d92c8c827
1 changed files with 2 additions and 2 deletions
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4
Source/cmSystemTools.cxx
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@ -2294,8 +2294,8 @@ unsigned int cmSystemTools::RandomSeed()
struct timeval t;
gettimeofday(&t, 0);
unsigned int pid = static_cast<unsigned int>(getpid());
unsigned int tv_sec = t.tv_sec;
unsigned int tv_usec = t.tv_usec;
unsigned int tv_sec = static_cast<unsigned int>(t.tv_sec);
unsigned int tv_usec = static_cast<unsigned int>(t.tv_usec);
// Since tv_usec never fills more than 11 bits we shift it to fill
// in the slow-changing high-order bits of tv_sec.
return tv_sec ^ (tv_usec << 21) ^ pid;