lib/libcurses/curses.c

   1 /*      $NetBSD: curses.c,v 1.22 2007/05/28 15:01:55 blymn 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 1.22 2007/05/28 15:01:55 blymn 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
  55 char    PC;
  56 char    __tc_am, __tc_bs, __tc_cc, __tc_da, __tc_eo,
  57         __tc_hc, __tc_hl, __tc_in, __tc_mi, __tc_ms,
  58         __tc_nc, __tc_ns, __tc_os, __tc_ul, __tc_ut,
  59         __tc_xb, __tc_xn, __tc_xt, __tc_xs, __tc_xx;
  60 char    __CA;
  61 int     __tc_pa, __tc_Co, __tc_NC;
  62 char    *__tc_ac, *__tc_AB, *__tc_ae, *__tc_AF, *__tc_AL,
  63         *__tc_al, *__tc_as, *__tc_bc, *__tc_bl, *__tc_bt,
  64         *__tc_cd, *__tc_ce, *__tc_cl, *__tc_cm, *__tc_cr,
  65         *__tc_cs, *__tc_dc, *__tc_DL, *__tc_dl, *__tc_dm,
  66         *__tc_DO, *__tc_do, *__tc_eA, *__tc_ed, *__tc_ei,
  67         *__tc_ho, *__tc_Ic, *__tc_ic, *__tc_im, *__tc_Ip,
  68         *__tc_ip, *__tc_k0, *__tc_k1, *__tc_k2, *__tc_k3,
  69         *__tc_k4, *__tc_k5, *__tc_k6, *__tc_k7, *__tc_k8,
  70         *__tc_k9, *__tc_kd, *__tc_ke, *__tc_kh, *__tc_kl,
  71         *__tc_kr, *__tc_ks, *__tc_ku, *__tc_LE, *__tc_ll,
  72         *__tc_ma, *__tc_mb, *__tc_md, *__tc_me, *__tc_mh,
  73         *__tc_mk, *__tc_mm, *__tc_mo, *__tc_mp, *__tc_mr,
  74         *__tc_nd, *__tc_nl, *__tc_oc, *__tc_op,
  75         *__tc_rc, *__tc_RI, *__tc_Sb, *__tc_sc, *__tc_se,
  76         *__tc_SF, *__tc_Sf, *__tc_sf, *__tc_so, *__tc_sp,
  77         *__tc_SR, *__tc_sr, *__tc_ta, *__tc_te, *__tc_ti,
  78         *__tc_uc, *__tc_ue, *__tc_UP, *__tc_up, *__tc_us,
  79         *__tc_vb, *__tc_ve, *__tc_vi, *__tc_vs;
  80
  81 #ifdef HAVE_WCHAR
  82 char *__tc_Xh, *__tc_Xl, *__tc_Xo, *__tc_Xr, *__tc_Xt,
  83         *__tc_Xv;
  84 #endif /* HAVE_WCHAR */
  85
  86 /*
  87  * Public.
  88  *
  89  * XXX
  90  * UPPERCASE isn't used by libcurses, and is left for backward
  91  * compatibility only.
  92  */
  93 WINDOW  *curscr;                        /* Current screen. */
  94 WINDOW  *stdscr;                        /* Standard screen. */
  95 WINDOW  *__virtscr;                     /* Virtual screen (for doupdate()). */
  96 SCREEN  *_cursesi_screen;               /* the current screen we are using */
  97 int      COLS;                          /* Columns on the screen. */
  98 int      LINES;                         /* Lines on the screen. */
  99 int      COLORS;                        /* Maximum colors on the screen */
 100 int      COLOR_PAIRS = 0;               /* Maximum color pairs on the screen */
 101 int      My_term = 0;                   /* Use Def_term regardless. */
 102 const char      *Def_term = "unknown";  /* Default terminal type. */
 103 char     __GT;                          /* Gtty indicates tabs. */
 104 char     __NONL;                        /* Term can't hack LF doing a CR. */
 105 char     __UPPERCASE;                   /* Terminal is uppercase only. */
 106
 107 #ifdef HAVE_WCHAR
 108 /*
 109  * Copy the non-spacing character list (src_nsp) to the given character,
 110  * allocate or free storage as required.
 111  */
 112 int
 113 _cursesi_copy_nsp(nschar_t *src_nsp, struct __ldata *ch)
 114 {
 115         nschar_t *np, *tnp, *pnp;
 116
 117         pnp = NULL;
 118         np = src_nsp;
 119         if (np) {
 120                 tnp = ch->nsp;
 121                 while (np) {
 122                         if (tnp) {
 123                                 tnp->ch = np->ch;
 124                                 pnp = tnp;
 125                                 tnp = tnp->next;
 126                         } else {
 127                                 tnp = (nschar_t *)malloc(sizeof(nschar_t));
 128                                 if (!tnp)
 129                                         return ERR;
 130                                 tnp->ch = np->ch;
 131                                 pnp->next = tnp;
 132                                 tnp->next = NULL;
 133                                 pnp = tnp;
 134                                 tnp = NULL;
 135                         }
 136                         np = np->next;
 137                 }
 138                 np = tnp;
 139                 if (np) {
 140                         pnp->next = NULL;
 141                         __cursesi_free_nsp(np);
 142                 }
 143         } else {
 144                 if (ch->nsp) {
 145                         __cursesi_free_nsp(ch->nsp);
 146                         ch->nsp = NULL;
 147                 }
 148         }
 149
 150         return OK;
 151 }
 152
 153 /*
 154  * Free the storage associated with a non-spacing character - traverse the
 155  * linked list until all storage is done.
 156  */
 157 void
 158 __cursesi_free_nsp(nschar_t *inp)
 159 {
 160         nschar_t *tnp, *np;
 161
 162         np = inp;
 163         if (np) {
 164                 while (np) {
 165                         tnp = np->next;
 166                         free(np);
 167                         np = tnp;
 168                 }
 169         }
 170 }
 171
 172 /*
 173  * Traverse all the cells in the given window free'ing the non-spacing
 174  * character storage.
 175  */
 176 void
 177 __cursesi_win_free_nsp(WINDOW *win)
 178 {
 179         int     i, j;
 180         __LDATA *sp;
 181
 182         for (i = 0; i < win->maxy; i++) {
 183                 for (sp = win->alines[i]->line, j = 0; j < win->maxx;
 184                      j++, sp++) {
 185                         __cursesi_free_nsp(sp->nsp);
 186                 }
 187         }
 188 }
 189
 190 #endif