x_load_hist
static void x_load_hist ARGS((char **hp));
x_load_hist(histptr - off);
static int x_beg_hist(c) int c; { x_load_hist(histlist); return KSTD;}
static int x_end_hist(c) int c; { x_load_hist(histptr); return KSTD;}
static int x_prev_com(c) int c; { x_load_hist(x_histp - x_arg); return KSTD;}
static int x_next_com(c) int c; { x_load_hist(x_histp + x_arg); return KSTD;}
x_load_hist(histlist);
x_load_hist(histptr + x_arg - source->line);
x_load_hist(hp);