ncurses/lib_screen.c

   1
   2 /***************************************************************************
   3 *                            COPYRIGHT NOTICE                              *
   4 ****************************************************************************
   5 *                ncurses is copyright (C) 1992-1995                        *
   6 *                          Zeyd M. Ben-Halim                               *
   7 *                          zmbenhal@netcom.com                             *
   8 *                          Eric S. Raymond                                 *
   9 *                          esr@snark.thyrsus.com                           *
  10 *                                                                          *
  11 *        Permission is hereby granted to reproduce and distribute ncurses  *
  12 *        by any means and for any fee, whether alone or as part of a       *
  13 *        larger distribution, in source or in binary form, PROVIDED        *
  14 *        this notice is included with any such distribution, and is not    *
  15 *        removed from any of its header files. Mention of ncurses in any   *
  16 *        applications linked with it is highly appreciated.                *
  17 *                                                                          *
  18 *        ncurses comes AS IS with no warranty, implied or expressed.       *
  19 *                                                                          *
  20 ***************************************************************************/
  21
  22
  23 #include <curses.priv.h>
  24
  25 #include <sys/stat.h>
  26 #include <time.h>
  27 #include <term.h>       /* exit_ca_mode, non_rev_rmcup */
  28
  29 MODULE_ID("$Id: lib_screen.c,v 1.7 1997/02/02 00:41:10 tom Exp $")
  30
  31 static time_t   dumptime;
  32
  33 WINDOW *getwin(FILE *filep)
  34 {
  35         WINDOW  try, *nwin;
  36         int     n;
  37
  38         T((T_CALLED("getwin(%p)"), filep));
  39
  40         (void) fread(&try, sizeof(WINDOW), 1, filep);
  41         if (ferror(filep))
  42                 returnWin(0);
  43
  44         if ((nwin = newwin(try._maxy+1, try._maxx+1, 0, 0)) == 0)
  45                 returnWin(0);
  46
  47         /*
  48          * We deliberately do not restore the _parx, _pary, or _parent
  49          * fields, because the window hierarchy within which they
  50          * made sense is probably gone.
  51          */
  52         nwin->_curx       = try._curx;
  53         nwin->_cury       = try._cury;
  54         nwin->_maxy       = try._maxy;
  55         nwin->_maxx       = try._maxx;
  56         nwin->_begy       = try._begy;
  57         nwin->_begx       = try._begx;
  58         nwin->_yoffset    = try._yoffset;
  59         nwin->_flags      = try._flags & ~(_SUBWIN|_ISPAD);
  60
  61         nwin->_attrs      = try._attrs;
  62         nwin->_bkgd       = try._bkgd;
  63
  64         nwin->_clear      = try._clear;
  65         nwin->_scroll     = try._scroll;
  66         nwin->_leaveok    = try._leaveok;
  67         nwin->_use_keypad = try._use_keypad;
  68         nwin->_delay      = try._delay;
  69         nwin->_immed      = try._immed;
  70         nwin->_sync       = try._sync;
  71
  72         nwin->_regtop     = try._regtop;
  73         nwin->_regbottom  = try._regbottom;
  74
  75         for (n = 0; n < nwin->_maxy + 1; n++)
  76         {
  77                 (void) fread(nwin->_line[n].text,
  78                               sizeof(chtype), (size_t)(nwin->_maxx + 1), filep);
  79                 if (ferror(filep))
  80                 {
  81                         delwin(nwin);
  82                         returnWin(0);
  83                 }
  84         }
  85         touchwin(nwin);
  86
  87         returnWin(nwin);
  88 }
  89
  90 int putwin(WINDOW *win, FILE *filep)
  91 {
  92         int     n;
  93
  94         T((T_CALLED("putwin(%p,%p)"), win, filep));
  95
  96         (void) fwrite(win, sizeof(WINDOW), 1, filep);
  97         if (ferror(filep))
  98                 returnCode(ERR);
  99
 100         for (n = 0; n < win->_maxy + 1; n++)
 101         {
 102                 (void) fwrite(win->_line[n].text,
 103                               sizeof(chtype), (size_t)(win->_maxx + 1), filep);
 104                 if (ferror(filep))
 105                         returnCode(ERR);
 106         }
 107
 108         returnCode(OK);
 109 }
 110
 111 int scr_restore(const char *file)
 112 {
 113         FILE    *fp;
 114
 115         T((T_CALLED("scr_restore(%s)"), _nc_visbuf(file)));
 116
 117         if ((fp = fopen(file, "r")) == 0)
 118             returnCode(ERR);
 119         else
 120         {
 121             delwin(newscr);
 122             newscr = getwin(fp);
 123             (void) fclose(fp);
 124             returnCode(OK);
 125         }
 126 }
 127
 128 int scr_dump(const char *file)
 129 {
 130         FILE    *fp;
 131
 132         T((T_CALLED("scr_dump(%s)"), _nc_visbuf(file)));
 133
 134         if ((fp = fopen(file, "w")) == 0)
 135             returnCode(ERR);
 136         else
 137         {
 138             (void) putwin(newscr, fp);
 139             (void) fclose(fp);
 140             dumptime = time((time_t *)0);
 141             returnCode(OK);
 142         }
 143 }
 144
 145 int scr_init(const char *file)
 146 {
 147         FILE    *fp;
 148         struct stat     stb;
 149
 150         T((T_CALLED("scr_init(%s)"), _nc_visbuf(file)));
 151
 152 #ifdef exit_ca_mode
 153         if (exit_ca_mode && non_rev_rmcup)
 154             returnCode(ERR);
 155 #endif /* exit_ca_mode */
 156
 157         if ((fp = fopen(file, "r")) == 0)
 158             returnCode(ERR);
 159         else if (fstat(STDOUT_FILENO, &stb) || stb.st_mtime > dumptime)
 160             returnCode(ERR);
 161         else
 162         {
 163             delwin(curscr);
 164             curscr = getwin(fp);
 165             (void) fclose(fp);
 166             returnCode(OK);
 167         }
 168 }
 169
 170 int scr_set(const char *file)
 171 {
 172     T((T_CALLED("scr_set(%s)"), _nc_visbuf(file)));
 173
 174     if (scr_init(file) == ERR)
 175         returnCode(ERR);
 176     else
 177     {
 178         delwin(newscr);
 179         newscr = dupwin(curscr);
 180         returnCode(OK);
 181     }
 182 }