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curses.c revision 1.24 
      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
    161