PMF$#"othello.h"G* strdup( str)G* str;;{G* newstr;;x;;$(( newstr(G*)(H( str)+W)) NULL) { (x_;;xH( str);;x)*( newstr+x)*( str+x);; };;o( newstr);;};;E The At_???? macros each take a Board Descriptor as their argument. E Their value is TRUE or FALSE, depending on whether the square E described by the (BOARD *)brd descriptor is in the topmost row, E bottommost row, leftmost column or rightmost column of the Board E respectively. E E.IMPORTANT...IMPORTANT...IMPORTANT...IMPORTANT...IMPORTANT...IMPORTAE E These macros will not work with Hisoft C. From experience, it E appears that - among the many, many things which the Hisoft C E Interpreter cannot handle - it cannot handle macros which involve E struct's. You may remember the problems with the macros used in E game_over() last month - which have now been abandoned. E E As a consequence, the macros have been replaced by the 4 (slower) E functions given below. Sorry, but these macros are just too damn E useful for me to deprive non-Hisoft C users of them.  At_top( brd) BOARD* brd;;{o( brd offset BRD_W);;};;At_bottom( brd) BOARD* brd;;{o(( brd offset+ BRD_W) BRD_SIZ);;};; At_left( brd) BOARD* brd;;{o(( brd offset% BRD_W)_);;};;At_right( brd) BOARD* brd;;{o(( brd offset% BRD_W)( BRD_W-W));;};;