Optimizations to preprocessor's find_define().
- don't check for __FILE__ and __LINE__ until after we've checked our hash,
since this is the less likely case.
- Check against the hard-coded hash value of the strings "__FILE__" and
"__LINE__" to avoid unnecessary strcmp() calls.
This dropped the profile of this function from 20% of our total CPU time to
10%. Of that 10%, 70% is now the hashing function.
Copyright (c) 2008-2011 Ryan C. Gordon.
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Ryan C. Gordon <icculus@icculus.org>