lib/libcurses/curses.c

   1 /*      $NetBSD: curses.c,v 1.24 2010/02/03 15:34:40 roy Exp $  */
   2
   3 /*
   4  * Copyright (c) 1981, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #include <stdlib.h>
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)curses.c    8.3 (Berkeley) 5/4/94";
  37 #else
  38 __RCSID("$NetBSD: curses.c,v 1.24 2010/02/03 15:34:40 roy Exp $");
  39 #endif
  40 #endif                          /* not lint */
  41
  42 #include "curses.h"
  43 #include "curses_private.h"
  44
  45 /* Private. */
  46 int     __echoit = 1;                    /* If stty indicates ECHO. */
  47 int     __pfast;
  48 int     __rawmode = 0;                   /* If stty indicates RAW mode. */
  49 int     __noqch = 0;
  50                                          /* If terminal doesn't have
  51                                          * insert/delete line capabilities
  52                                          * for quick change on refresh.
  53                                          */
  54 char    __CA;
  55
  56 /*
  57  * Public.
  58  *
  59  * XXX
  60  * UPPERCASE isn't used by libcurses, and is left for backward
  61  * compatibility only.
  62  */
  63 WINDOW  *curscr;                        /* Current screen. */
  64 WINDOW  *stdscr;                        /* Standard screen. */
  65 WINDOW  *__virtscr;                     /* Virtual screen (for doupdate()). */
  66 SCREEN  *_cursesi_screen;               /* the current screen we are using */
  67 int      COLS;                          /* Columns on the screen. */
  68 int      LINES;                         /* Lines on the screen. */
  69 int      COLORS;                        /* Maximum colors on the screen */
  70 int      COLOR_PAIRS = 0;               /* Maximum color pairs on the screen */
  71 int      My_term = 0;                   /* Use Def_term regardless. */
  72 const char      *Def_term = "unknown";  /* Default terminal type. */
  73 char     __GT;                          /* Gtty indicates tabs. */
  74 char     __NONL;                        /* Term can't hack LF doing a CR. */
  75 char     __UPPERCASE;                   /* Terminal is uppercase only. */
  76
  77 #ifdef HAVE_WCHAR
  78 /*
  79  * Copy the non-spacing character list (src_nsp) to the given character,
  80  * allocate or free storage as required.
  81  */
  82 int
  83 _cursesi_copy_nsp(nschar_t *src_nsp, struct __ldata *ch)
  84 {
  85         nschar_t *np, *tnp, *pnp;
  86
  87         pnp = NULL;
  88         np = src_nsp;
  89         if (np) {
  90                 tnp = ch->nsp;
  91                 while (np) {
  92                         if (tnp) {
  93                                 tnp->ch = np->ch;
  94                                 pnp = tnp;
  95                                 tnp = tnp->next;
  96                         } else {
  97                                 tnp = (nschar_t *)malloc(sizeof(nschar_t));
  98                                 if (!tnp)
  99                                         return ERR;
 100                                 tnp->ch = np->ch;
 101                                 pnp->next = tnp;
 102                                 tnp->next = NULL;
 103                                 pnp = tnp;
 104                                 tnp = NULL;
 105                         }
 106                         np = np->next;
 107                 }
 108                 np = tnp;
 109                 if (np) {
 110                         pnp->next = NULL;
 111                         __cursesi_free_nsp(np);
 112                 }
 113         } else {
 114                 if (ch->nsp) {
 115                         __cursesi_free_nsp(ch->nsp);
 116                         ch->nsp = NULL;
 117                 }
 118         }
 119
 120         return OK;
 121 }
 122
 123 /*
 124  * Free the storage associated with a non-spacing character - traverse the
 125  * linked list until all storage is done.
 126  */
 127 void
 128 __cursesi_free_nsp(nschar_t *inp)
 129 {
 130         nschar_t *tnp, *np;
 131
 132         np = inp;
 133         if (np) {
 134                 while (np) {
 135                         tnp = np->next;
 136                         free(np);
 137                         np = tnp;
 138                 }
 139         }
 140 }
 141
 142 /*
 143  * Traverse all the cells in the given window free'ing the non-spacing
 144  * character storage.
 145  */
 146 void
 147 __cursesi_win_free_nsp(WINDOW *win)
 148 {
 149         int     i, j;
 150         __LDATA *sp;
 151
 152         for (i = 0; i < win->maxy; i++) {
 153                 for (sp = win->alines[i]->line, j = 0; j < win->maxx;
 154                      j++, sp++) {
 155                         __cursesi_free_nsp(sp->nsp);
 156                 }
 157         }
 158 }
 159
 160 #endif