#ifndef OWNER #define Extern extern #else #define Extern #endif #include "stdio.h" #include "ed.h" /*efine WFDEBUG 0 /* Window flag debug. */ typedef struct VIDEO { short v_flag; /* Flags */ char v_text[1]; /* Screen data. */ } VIDEO; #define VFCHG 0x0001 /* Changed. */ Extern int sgarbf #ifdef OWNER = TRUE #endif ; /* TRUE if screen is garbage */ Extern int mpresf #ifdef OWNER = FALSE #endif ; /* TRUE if message in last line */ Extern int vtrow #ifdef OWNER = 0 #endif ; /* Row location of SW cursor */ Extern int vtcol #ifdef OWNER = 0 #endif ; /* Column location of SW cursor */ Extern int ttrow #ifdef OWNER = HUGE #endif ; /* Row location of HW cursor */ Extern int ttcol #ifdef OWNER = HUGE #endif ; /* Column location of HW cursor */ Extern VIDEO **vscreen; /* Virtual screen. */ Extern VIDEO **pscreen; /* Physical screen. */  .