GetBit            100 coders/otb.c   #define GetBit(a,i) (((a) >> (i)) & 1L)
GetBit            102 coders/stegano.c #define GetBit(alpha,i) MagickMin((((size_t) (alpha) >> (size_t) \
GetBit           4705 magick/fx.c    #define GetBit(alpha,i) ((((size_t) (alpha) >> (size_t) (i)) & 0x01) != 0)