#202: Undefined behavior in Coordinate::hashCode
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Reporter: mloskot | Owner: [email protected]
Type: defect | Status: new
Priority: major | Milestone:
Component: Core | Version: svn-trunk
Severity: Significant | Resolution:
Keywords: coordinate hash double |
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Comment (by bmharper):
Mateusz - you mentioned that this violates aliasing rules:
unsigned int HashDouble( double d )
{
unsigned int* i = (unsigned int*) &d;
return i[0] ^ i[1];
}
Can you explain further, or point me to the relevant C/++ docs?
Thanks,
Ben
ps-- Your code references &x. Should this not be &d?
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Ticket URL: <http://trac.osgeo.org/geos/ticket/202#comment:1>
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