release/src/router/libncurses/ncurses/base/lib_screen.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Thomas E. Dickey                        1996 on                 *
  33  *     and: Juergen Pfeifer                         2009                    *
  34  ****************************************************************************/
  35
  36 #include <curses.priv.h>
  37
  38 #ifndef CUR
  39 #define CUR SP_TERMTYPE
  40 #endif
  41
  42 MODULE_ID("$Id: lib_screen.c,v 1.38 2009/10/24 22:08:55 tom Exp $")
  43
  44 #define MAX_SIZE 0x3fff         /* 16k is big enough for a window or pad */
  45
  46 NCURSES_EXPORT(WINDOW *)
  47 NCURSES_SP_NAME(getwin) (NCURSES_SP_DCLx FILE *filep)
  48 {
  49     WINDOW tmp, *nwin;
  50     int n;
  51
  52     T((T_CALLED("getwin(%p)"), (void *) filep));
  53
  54     clearerr(filep);
  55     if (fread(&tmp, 1, sizeof(WINDOW), filep) < sizeof(WINDOW)
  56         || ferror(filep)
  57         || tmp._maxy == 0
  58         || tmp._maxy > MAX_SIZE
  59         || tmp._maxx == 0
  60         || tmp._maxx > MAX_SIZE) {
  61         returnWin(0);
  62     }
  63
  64     if (tmp._flags & _ISPAD) {
  65         nwin = NCURSES_SP_NAME(newpad) (NCURSES_SP_ARGx
  66                                         tmp._maxy + 1,
  67                                         tmp._maxx + 1);
  68     } else {
  69         nwin = NCURSES_SP_NAME(newwin) (NCURSES_SP_ARGx
  70                                         tmp._maxy + 1,
  71                                         tmp._maxx + 1, 0, 0);
  72     }
  73
  74     /*
  75      * We deliberately do not restore the _parx, _pary, or _parent
  76      * fields, because the window hierarchy within which they
  77      * made sense is probably gone.
  78      */
  79     if (nwin != 0) {
  80         size_t linesize = sizeof(NCURSES_CH_T) * (size_t) (tmp._maxx + 1);
  81
  82         nwin->_curx = tmp._curx;
  83         nwin->_cury = tmp._cury;
  84         nwin->_maxy = tmp._maxy;
  85         nwin->_maxx = tmp._maxx;
  86         nwin->_begy = tmp._begy;
  87         nwin->_begx = tmp._begx;
  88         nwin->_yoffset = tmp._yoffset;
  89         nwin->_flags = tmp._flags & ~(_SUBWIN);
  90
  91         WINDOW_ATTRS(nwin) = WINDOW_ATTRS(&tmp);
  92         nwin->_nc_bkgd = tmp._nc_bkgd;
  93
  94         nwin->_notimeout = tmp._notimeout;
  95         nwin->_clear = tmp._clear;
  96         nwin->_leaveok = tmp._leaveok;
  97         nwin->_idlok = tmp._idlok;
  98         nwin->_idcok = tmp._idcok;
  99         nwin->_immed = tmp._immed;
 100         nwin->_scroll = tmp._scroll;
 101         nwin->_sync = tmp._sync;
 102         nwin->_use_keypad = tmp._use_keypad;
 103         nwin->_delay = tmp._delay;
 104
 105         nwin->_regtop = tmp._regtop;
 106         nwin->_regbottom = tmp._regbottom;
 107
 108         if (tmp._flags & _ISPAD)
 109             nwin->_pad = tmp._pad;
 110
 111         for (n = 0; n <= nwin->_maxy; n++) {
 112             clearerr(filep);
 113             if (fread(nwin->_line[n].text, 1, linesize, filep) < linesize
 114                 || ferror(filep)) {
 115                 delwin(nwin);
 116                 returnWin(0);
 117             }
 118         }
 119         touchwin(nwin);
 120     }
 121     returnWin(nwin);
 122 }
 123
 124 #if NCURSES_SP_FUNCS
 125 NCURSES_EXPORT(WINDOW *)
 126 getwin(FILE *filep)
 127 {
 128     return NCURSES_SP_NAME(getwin) (CURRENT_SCREEN, filep);
 129 }
 130 #endif
 131
 132 NCURSES_EXPORT(int)
 133 putwin(WINDOW *win, FILE *filep)
 134 {
 135     int code = ERR;
 136     int n;
 137
 138     T((T_CALLED("putwin(%p,%p)"), (void *) win, (void *) filep));
 139
 140     if (win != 0) {
 141         size_t len = (size_t) (win->_maxx + 1);
 142
 143         clearerr(filep);
 144         if (fwrite(win, sizeof(WINDOW), 1, filep) != 1
 145             || ferror(filep))
 146               returnCode(code);
 147
 148         for (n = 0; n <= win->_maxy; n++) {
 149             if (fwrite(win->_line[n].text,
 150                        sizeof(NCURSES_CH_T), len, filep) != len
 151                 || ferror(filep)) {
 152                 returnCode(code);
 153             }
 154         }
 155         code = OK;
 156     }
 157     returnCode(code);
 158 }
 159
 160 NCURSES_EXPORT(int)
 161 NCURSES_SP_NAME(scr_restore) (NCURSES_SP_DCLx const char *file)
 162 {
 163     FILE *fp = 0;
 164
 165     T((T_CALLED("scr_restore(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
 166
 167     if (_nc_access(file, R_OK) < 0
 168         || (fp = fopen(file, "rb")) == 0) {
 169         returnCode(ERR);
 170     } else {
 171         delwin(NewScreen(SP_PARM));
 172         NewScreen(SP_PARM) = getwin(fp);
 173 #if !USE_REENTRANT
 174         newscr = NewScreen(SP_PARM);
 175 #endif
 176         (void) fclose(fp);
 177         returnCode(OK);
 178     }
 179 }
 180
 181 #if NCURSES_SP_FUNCS
 182 NCURSES_EXPORT(int)
 183 scr_restore(const char *file)
 184 {
 185     return NCURSES_SP_NAME(scr_restore) (CURRENT_SCREEN, file);
 186 }
 187 #endif
 188
 189 NCURSES_EXPORT(int)
 190 scr_dump(const char *file)
 191 {
 192     FILE *fp = 0;
 193
 194     T((T_CALLED("scr_dump(%s)"), _nc_visbuf(file)));
 195
 196     if (_nc_access(file, W_OK) < 0
 197         || (fp = fopen(file, "wb")) == 0) {
 198         returnCode(ERR);
 199     } else {
 200         (void) putwin(newscr, fp);
 201         (void) fclose(fp);
 202         returnCode(OK);
 203     }
 204 }
 205
 206 NCURSES_EXPORT(int)
 207 NCURSES_SP_NAME(scr_init) (NCURSES_SP_DCLx const char *file)
 208 {
 209     FILE *fp = 0;
 210     int code = ERR;
 211
 212     T((T_CALLED("scr_init(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
 213
 214     if (SP_PARM != 0 &&
 215 #ifdef USE_TERM_DRIVER
 216         InfoOf(SP_PARM).caninit
 217 #else
 218         !(exit_ca_mode && non_rev_rmcup)
 219 #endif
 220         ) {
 221         if (_nc_access(file, R_OK) >= 0
 222             && (fp = fopen(file, "rb")) != 0) {
 223             delwin(CurScreen(SP_PARM));
 224             CurScreen(SP_PARM) = getwin(fp);
 225 #if !USE_REENTRANT
 226             curscr = CurScreen(SP_PARM);
 227 #endif
 228             (void) fclose(fp);
 229             code = OK;
 230         }
 231     }
 232     returnCode(code);
 233 }
 234
 235 #if NCURSES_SP_FUNCS
 236 NCURSES_EXPORT(int)
 237 scr_init(const char *file)
 238 {
 239     return NCURSES_SP_NAME(scr_init) (CURRENT_SCREEN, file);
 240 }
 241 #endif
 242
 243 NCURSES_EXPORT(int)
 244 NCURSES_SP_NAME(scr_set) (NCURSES_SP_DCLx const char *file)
 245 {
 246     T((T_CALLED("scr_set(%p,%s)"), (void *) SP_PARM, _nc_visbuf(file)));
 247
 248     if (NCURSES_SP_NAME(scr_init) (NCURSES_SP_ARGx file) == ERR) {
 249         returnCode(ERR);
 250     } else {
 251         delwin(NewScreen(SP_PARM));
 252         NewScreen(SP_PARM) = dupwin(curscr);
 253 #if !USE_REENTRANT
 254         newscr = NewScreen(SP_PARM);
 255 #endif
 256         returnCode(OK);
 257     }
 258 }
 259
 260 #if NCURSES_SP_FUNCS
 261 NCURSES_EXPORT(int)
 262 scr_set(const char *file)
 263 {
 264     return NCURSES_SP_NAME(scr_set) (CURRENT_SCREEN, file);
 265 }
 266 #endif