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curses.c revision 1.26.2.1 
      1 /*	$NetBSD: curses.c,v 1.26.2.1 2017/04/21 16:53:10 bouyer 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 1.26.2.1 2017/04/21 16:53:10 bouyer 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 volatile bool	 _reentrant;		/* If true, some global vars are ro. */
     68 int	 COLS;				/* Columns on the screen. */
     69 int	 LINES;				/* Lines on the screen. */
     70 int	 ESCDELAY;			/* ms delay between keys for esc seq */
     71 int	 TABSIZE;			/* Size of a tab. */
     72 int	 COLORS;			/* Maximum colors on the screen */
     73 int	 COLOR_PAIRS = 0;		/* Maximum color pairs on the screen */
     74 int	 My_term = 0;			/* Use Def_term regardless. */
     75 const char	*Def_term = "unknown";	/* Default terminal type. */
     76 char	 __GT;				/* Gtty indicates tabs. */
     77 char	 __NONL;			/* Term can't hack LF doing a CR. */
     78 char	 __UPPERCASE;			/* Terminal is uppercase only. */
     79 
     80 #ifdef HAVE_WCHAR
     81 /*
     82  * Copy the non-spacing character list (src_nsp) to the given character,
     83  * allocate or free storage as required.
     84  */
     85 int
     86 _cursesi_copy_nsp(nschar_t *src_nsp, struct __ldata *ch)
     87 {
     88 	nschar_t *np, *tnp, *pnp;
     89 
     90 	pnp = NULL;
     91 	np = src_nsp;
     92 	if (np) {
     93 		tnp = ch->nsp;
     94 		while (np) {
     95 			if (tnp) {
     96 				tnp->ch = np->ch;
     97 				pnp = tnp;
     98 				tnp = tnp->next;
     99 			} else {
    100 				tnp = malloc(sizeof(nschar_t));
    101 				if (!tnp)
    102 					return ERR;
    103 				tnp->ch = np->ch;
    104 				pnp->next = tnp;
    105 				tnp->next = NULL;
    106 				pnp = tnp;
    107 				tnp = NULL;
    108 			}
    109 			np = np->next;
    110 		}
    111                 np = tnp;
    112 		if (np) {
    113 			pnp->next = NULL;
    114 			__cursesi_free_nsp(np);
    115 		}
    116 	} else {
    117 		if (ch->nsp) {
    118 			__cursesi_free_nsp(ch->nsp);
    119 			ch->nsp = NULL;
    120 		}
    121 	}
    122 
    123 	return OK;
    124 }
    125 
    126 /*
    127  * Free the storage associated with a non-spacing character - traverse the
    128  * linked list until all storage is done.
    129  */
    130 void
    131 __cursesi_free_nsp(nschar_t *inp)
    132 {
    133 	nschar_t *tnp, *np;
    134 
    135 	np = inp;
    136 	if (np) {
    137 		while (np) {
    138 			tnp = np->next;
    139 			free(np);
    140 			np = tnp;
    141 		}
    142 	}
    143 }
    144 
    145 /*
    146  * Traverse all the cells in the given window free'ing the non-spacing
    147  * character storage.
    148  */
    149 void
    150 __cursesi_win_free_nsp(WINDOW *win)
    151 {
    152 	int     i, j;
    153 	__LDATA *sp;
    154 
    155 	for (i = 0; i < win->maxy; i++) {
    156 		for (sp = win->alines[i]->line, j = 0; j < win->maxx;
    157 		     j++, sp++) {
    158 			__cursesi_free_nsp(sp->nsp);
    159 		}
    160 	}
    161 }
    162 
    163 #endif
    164