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                               fg_adjustxy

   Usage
   #include <fg.h>
   void  far fg_adjustxy (int rot, int n, fg_coord_t far *px,  fg_coord_t
   far *py, fg_const_pbox_t box);

   Description
   The  x  or y coordinate for the next character (or object  bounded  by
   box) is calculated depending on the rotation rot, which must be one of
   the  constants FG_ROT0, FG_ROT90, FG_ROT180 or FG_ROT270. *px and  *py
   are  pointers  to the coordinates of the starting  location  of  first
   character  in  the  string  and are adjusted  to  be  where  the  next
   character (object) would go. The argument n is the number of chars  or
   objects already output.

   This function is most useful with fg_drawmatrix and fg_puts.

   Example

   {
   static char test_string[] = "This is a test.";
   fg_coord_t x, y;
        x = fg.displaybox[FG_X1] + fg.displaybox[FG_X2];
        x -= sizeof(test_string) * (fg.charbox[FG_X2] + 1);
        x /= 2;
        y = (fg.displaybox[FG_Y1] + fg.displaybox[FG_Y2])/2;

        fg_puts(FG_WHITE, FG_MODE_SET, ~0, FG_ROT0, x, y,
        test_string, fg.displaybox);

        fg_adjustxy(FG_ROT0, sizeof(test_string) - 1, &x, &y,fg.charbox);

        /* x and y now are located at the */
        /* end of the string "test string" */
   }