1 /* $NetBSD: curses.c,v 1.31 2022/10/19 06:09:27 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 1.31 2022/10/19 06:09:27 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 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 /* compare two cells on screen, must have the same foreground/background, 81 * and for wide characters the same sequence of non-spacing characters 82 */ 83 int 84 _cursesi_celleq(__LDATA *x, __LDATA *y) 85 { 86 #ifdef HAVE_WCHAR 87 nschar_t *xnp = x->nsp, *ynp = y->nsp; 88 #endif /* HAVE_WCHAR */ 89 int ret = ( x->ch == y->ch ) && ( x->attr == y->attr ); 90 91 #ifdef HAVE_WCHAR 92 if (!ret) 93 return 0; 94 95 if ((x->cflags & CA_CONTINUATION) != (y->cflags & CA_CONTINUATION)) 96 return 0; 97 98 if (!xnp && !ynp) 99 return 1; 100 101 if ((xnp && !ynp) || (!xnp && ynp)) 102 return 0; 103 104 while (xnp && ynp) { 105 if (xnp->ch != ynp->ch) 106 return 0; 107 xnp = xnp->next; 108 ynp = ynp->next; 109 } 110 111 return !xnp && !ynp; 112 #else 113 return ret; 114 #endif /* HAVE_WCHAR */ 115 } 116 117 #ifdef HAVE_WCHAR 118 /* 119 * Copy a complex character from source to destination. 120 * 121 */ 122 void 123 _cursesi_copy_wchar(__LDATA *src, __LDATA *dest) 124 { 125 dest->ch = src->ch; 126 dest->attr = src->attr; 127 dest->cflags = src->cflags; 128 dest->wcols = src->wcols; 129 _cursesi_copy_nsp(src->nsp, dest); 130 } 131 132 /* 133 * Copy the non-spacing character list (src_nsp) to the given character, 134 * allocate or free storage as required. 135 */ 136 int 137 _cursesi_copy_nsp(nschar_t *src_nsp, struct __ldata *ch) 138 { 139 nschar_t *np, *tnp, *pnp; 140 141 pnp = NULL; 142 np = src_nsp; 143 if (np) { 144 tnp = ch->nsp; 145 while (np) { 146 if (tnp) { 147 tnp->ch = np->ch; 148 pnp = tnp; 149 tnp = tnp->next; 150 } else { 151 tnp = malloc(sizeof(nschar_t)); 152 if (!tnp) 153 return ERR; 154 tnp->ch = np->ch; 155 pnp->next = tnp; 156 tnp->next = NULL; 157 pnp = tnp; 158 tnp = NULL; 159 } 160 np = np->next; 161 } 162 np = tnp; 163 if (np) { 164 pnp->next = NULL; 165 __cursesi_free_nsp(np); 166 } 167 } else { 168 if (ch->nsp) { 169 __cursesi_free_nsp(ch->nsp); 170 ch->nsp = NULL; 171 } 172 } 173 174 return OK; 175 } 176 177 /* 178 * Free the storage associated with a non-spacing character - traverse the 179 * linked list until all storage is done. 180 */ 181 void 182 __cursesi_free_nsp(nschar_t *inp) 183 { 184 nschar_t *tnp, *np; 185 186 np = inp; 187 if (np) { 188 while (np) { 189 tnp = np->next; 190 free(np); 191 np = tnp; 192 } 193 } 194 } 195 196 /* 197 * Traverse all the cells in the given window free'ing the non-spacing 198 * character storage. 199 */ 200 void 201 __cursesi_win_free_nsp(WINDOW *win) 202 { 203 int i, j; 204 __LDATA *sp; 205 206 for (i = 0; i < win->maxy; i++) { 207 for (sp = win->alines[i]->line, j = 0; j < win->maxx; 208 j++, sp++) { 209 __cursesi_free_nsp(sp->nsp); 210 } 211 } 212 } 213 214 #endif 215
Indexes created Sat Sep 20 22:09:52 GMT 2025