251 lines
6.3 KiB
C
251 lines
6.3 KiB
C
/* $NetBSD: getstr.c,v 1.18 2003/08/07 16:44:21 agc Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)getstr.c 8.2 (Berkeley) 5/4/94";
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#else
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__RCSID("$NetBSD: getstr.c,v 1.18 2003/08/07 16:44:21 agc Exp $");
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#endif
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#endif /* not lint */
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#include "curses.h"
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#include "curses_private.h"
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#ifndef _CURSES_USE_MACROS
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/*
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* getnstr --
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* Get a string (of maximum n) characters from stdscr starting at
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* (cury, curx).
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*/
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int
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getnstr(char *str, int n)
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{
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return wgetnstr(stdscr, str, n);
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}
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/*
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* getstr --
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* Get a string from stdscr starting at (cury, curx).
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*/
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__warn_references(getstr,
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"warning: this program uses getstr(), which is unsafe.")
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int
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getstr(char *str)
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{
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return wgetstr(stdscr, str);
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}
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/*
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* mvgetnstr --
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* Get a string (of maximum n) characters from stdscr starting at (y, x).
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*/
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int
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mvgetnstr(int y, int x, char *str, int n)
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{
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return mvwgetnstr(stdscr, y, x, str, n);
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}
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/*
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* mvgetstr --
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* Get a string from stdscr starting at (y, x).
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*/
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__warn_references(mvgetstr,
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"warning: this program uses mvgetstr(), which is unsafe.")
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int
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mvgetstr(int y, int x, char *str)
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{
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return mvwgetstr(stdscr, y, x, str);
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}
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/*
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* mvwgetnstr --
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* Get a string (of maximum n) characters from the given window starting
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* at (y, x).
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*/
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int
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mvwgetnstr(WINDOW *win, int y, int x, char *str, int n)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wgetnstr(win, str, n);
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}
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/*
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* mvwgetstr --
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* Get a string from the given window starting at (y, x).
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*/
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__warn_references(mvgetstr,
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"warning: this program uses mvgetstr(), which is unsafe.")
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int
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mvwgetstr(WINDOW *win, int y, int x, char *str)
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{
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if (wmove(win, y, x) == ERR)
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return ERR;
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return wgetstr(win, str);
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}
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#endif
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/*
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* wgetstr --
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* Get a string starting at (cury, curx).
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*/
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__warn_references(wgetstr,
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"warning: this program uses wgetstr(), which is unsafe.")
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int
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wgetstr(WINDOW *win, char *str)
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{
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return __wgetnstr(win, str, -1);
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}
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/*
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* wgetnstr --
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* Get a string starting at (cury, curx).
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* Note that n < 2 means that we return ERR (SUSv2 specification).
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*/
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int
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wgetnstr(WINDOW *win, char *str, int n)
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{
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if (n < 1)
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return (ERR);
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if (n == 1) {
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str[0] = '\0';
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return (ERR);
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}
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return __wgetnstr(win, str, n);
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}
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/*
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* __wgetnstr --
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* The actual implementation.
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* Note that we include a trailing '\0' for safety, so str will contain
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* at most n - 1 other characters.
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* XXX: character deletion from screen is based on how the characters
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* are displayed by wgetch().
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*/
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int
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__wgetnstr(WINDOW *win, char *str, int n)
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{
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char *ostr, ec, kc;
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int c, oldx, remain;
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ostr = str;
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ec = erasechar();
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kc = killchar();
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oldx = win->curx;
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_DIAGASSERT(n == -1 || n > 1);
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remain = n - 1;
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while ((c = wgetch(win)) != ERR && c != '\n' && c != '\r') {
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#ifdef DEBUG
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__CTRACE("__wgetnstr: win %p, char 0x%x, remain %d\n", win,
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c, remain);
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#endif
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*str = c;
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touchline(win, win->cury, 1);
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if (c == ec || c == KEY_BACKSPACE || c == KEY_LEFT) {
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*str = '\0';
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if (str != ostr) {
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if ((char) c == ec) {
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mvwaddch(win, win->cury, win->curx,
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' ');
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wmove(win, win->cury, win->curx - 1);
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}
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if (c == KEY_BACKSPACE || c == KEY_LEFT) {
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/* getch() displays the key sequence */
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mvwaddch(win, win->cury, win->curx - 1,
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' ');
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mvwaddch(win, win->cury, win->curx - 2,
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' ');
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wmove(win, win->cury, win->curx - 1);
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}
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str--;
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if (n != -1) {
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/* We're counting chars */
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remain++;
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}
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} else { /* str == ostr */
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if (c == KEY_BACKSPACE || c == KEY_LEFT)
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/* getch() displays the other keys */
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mvwaddch(win, win->cury, win->curx - 1,
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' ');
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wmove(win, win->cury, oldx);
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}
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} else if (c == kc) {
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*str = '\0';
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if (str != ostr) {
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/* getch() displays the kill character */
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mvwaddch(win, win->cury, win->curx - 1, ' ');
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/* Clear the characters from screen and str */
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while (str != ostr) {
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mvwaddch(win, win->cury, win->curx - 1,
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' ');
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wmove(win, win->cury, win->curx - 1);
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str--;
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if (n != -1)
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/* We're counting chars */
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remain++;
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}
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mvwaddch(win, win->cury, win->curx - 1, ' ');
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wmove(win, win->cury, win->curx - 1);
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} else
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/* getch() displays the kill character */
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mvwaddch(win, win->cury, oldx, ' ');
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wmove(win, win->cury, oldx);
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} else if (c >= KEY_MIN && c <= KEY_MAX) {
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/* getch() displays these characters */
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mvwaddch(win, win->cury, win->curx - 1, ' ');
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wmove(win, win->cury, win->curx - 1);
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} else {
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if (remain) {
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str++;
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remain--;
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} else {
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mvwaddch(win, win->cury, win->curx - 1, ' ');
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wmove(win, win->cury, win->curx - 1);
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}
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}
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}
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if (c == ERR) {
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*str = '\0';
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return (ERR);
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}
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*str = '\0';
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return (OK);
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}
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