sysrap/tests/fitsInShort_test.cc

0001 // name=fitsInShort_test ; gcc $name.cc -std=c++11 -lstdc++ -o /tmp/$name && /tmp/$name
0002
0003 #define fitsInShort(x) !(((((x) & 0xffff8000) >> 15) + 1) & 0x1fffe)
0004
0005 #include <cstdio>
0006 #include <limits>
0007
0008 int main()
0009 {
0010     int short_min = std::numeric_limits<short>::min() ;
0011     int short_max = std::numeric_limits<short>::max() ;
0012
0013     printf(" short_min %d short_max %d \n", short_min, short_max );
0014
0015     for(int i=short_min-10 ; i <= short_max+10 ; i++)
0016     {
0017         bool ok = fitsInShort(i);
0018         if( !ok || i < short_min + 100 || i > short_max - 100 )
0019         printf( " i %6d  0x%0.6x   -i %6d -0x %0.6x   ok %d \n", i, i,   -i, -i, ok  );
0020     }
0021
0022     return 0 ;
0023 }