BUFFER_FLOOR_OF   891 src/search.c   	tem = BUFFER_FLOOR_OF (start_byte - 1);
BUFFER_FLOOR_OF  1943 src/search.c   	  limit = BUFFER_FLOOR_OF (limit);
BUFFER_FLOOR_OF  2076 src/search.c   		   : BUFFER_FLOOR_OF (pos_byte - dirlen - 1));
BUFFER_FLOOR_OF  28506 src/xdisp.c    	  ceiling = BUFFER_FLOOR_OF (start_byte - 1);