NetBSD-5.0.2/lib/libcurses/getstr.c
/* $NetBSD: getstr.c,v 1.20 2007/05/28 15:01:55 blymn Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <assert.h>
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)getstr.c 8.2 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: getstr.c,v 1.20 2007/05/28 15:01:55 blymn Exp $");
#endif
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
#ifndef _CURSES_USE_MACROS
/*
* getnstr --
* Get a string (of maximum n) characters from stdscr starting at
* (cury, curx).
*/
int
getnstr(char *str, int n)
{
return wgetnstr(stdscr, str, n);
}
/*
* getstr --
* Get a string from stdscr starting at (cury, curx).
*/
__warn_references(getstr,
"warning: this program uses getstr(), which is unsafe.")
int
getstr(char *str)
{
return wgetstr(stdscr, str);
}
/*
* mvgetnstr --
* Get a string (of maximum n) characters from stdscr starting at (y, x).
*/
int
mvgetnstr(int y, int x, char *str, int n)
{
return mvwgetnstr(stdscr, y, x, str, n);
}
/*
* mvgetstr --
* Get a string from stdscr starting at (y, x).
*/
__warn_references(mvgetstr,
"warning: this program uses mvgetstr(), which is unsafe.")
int
mvgetstr(int y, int x, char *str)
{
return mvwgetstr(stdscr, y, x, str);
}
/*
* mvwgetnstr --
* Get a string (of maximum n) characters from the given window starting
* at (y, x).
*/
int
mvwgetnstr(WINDOW *win, int y, int x, char *str, int n)
{
if (wmove(win, y, x) == ERR)
return ERR;
return wgetnstr(win, str, n);
}
/*
* mvwgetstr --
* Get a string from the given window starting at (y, x).
*/
__warn_references(mvgetstr,
"warning: this program uses mvgetstr(), which is unsafe.")
int
mvwgetstr(WINDOW *win, int y, int x, char *str)
{
if (wmove(win, y, x) == ERR)
return ERR;
return wgetstr(win, str);
}
#endif
/*
* wgetstr --
* Get a string starting at (cury, curx).
*/
__warn_references(wgetstr,
"warning: this program uses wgetstr(), which is unsafe.")
int
wgetstr(WINDOW *win, char *str)
{
return __wgetnstr(win, str, -1);
}
/*
* wgetnstr --
* Get a string starting at (cury, curx).
* Note that n < 2 means that we return ERR (SUSv2 specification).
*/
int
wgetnstr(WINDOW *win, char *str, int n)
{
if (n < 1)
return (ERR);
if (n == 1) {
str[0] = '\0';
return (ERR);
}
return __wgetnstr(win, str, n);
}
/*
* __wgetnstr --
* The actual implementation.
* Note that we include a trailing '\0' for safety, so str will contain
* at most n - 1 other characters.
* XXX: character deletion from screen is based on how the characters
* are displayed by wgetch().
*/
int
__wgetnstr(WINDOW *win, char *str, int n)
{
char *ostr, ec, kc;
int c, oldx, remain;
ostr = str;
ec = erasechar();
kc = killchar();
oldx = win->curx;
_DIAGASSERT(n == -1 || n > 1);
remain = n - 1;
while ((c = wgetch(win)) != ERR && c != '\n' && c != '\r') {
#ifdef DEBUG
__CTRACE(__CTRACE_INPUT,
"__wgetnstr: win %p, char 0x%x, remain %d\n",
win, c, remain);
#endif
*str = c;
touchline(win, win->cury, 1);
if (c == ec || c == KEY_BACKSPACE || c == KEY_LEFT) {
*str = '\0';
if (str != ostr) {
if ((char) c == ec) {
mvwaddch(win, win->cury, win->curx,
' ');
wmove(win, win->cury, win->curx - 1);
}
if (c == KEY_BACKSPACE || c == KEY_LEFT) {
/* getch() displays the key sequence */
mvwaddch(win, win->cury, win->curx - 1,
' ');
mvwaddch(win, win->cury, win->curx - 2,
' ');
wmove(win, win->cury, win->curx - 1);
}
str--;
if (n != -1) {
/* We're counting chars */
remain++;
}
} else { /* str == ostr */
if (c == KEY_BACKSPACE || c == KEY_LEFT)
/* getch() displays the other keys */
mvwaddch(win, win->cury, win->curx - 1,
' ');
wmove(win, win->cury, oldx);
}
} else if (c == kc) {
*str = '\0';
if (str != ostr) {
/* getch() displays the kill character */
mvwaddch(win, win->cury, win->curx - 1, ' ');
/* Clear the characters from screen and str */
while (str != ostr) {
mvwaddch(win, win->cury, win->curx - 1,
' ');
wmove(win, win->cury, win->curx - 1);
str--;
if (n != -1)
/* We're counting chars */
remain++;
}
mvwaddch(win, win->cury, win->curx - 1, ' ');
wmove(win, win->cury, win->curx - 1);
} else
/* getch() displays the kill character */
mvwaddch(win, win->cury, oldx, ' ');
wmove(win, win->cury, oldx);
} else if (c >= KEY_MIN && c <= KEY_MAX) {
/* getch() displays these characters */
mvwaddch(win, win->cury, win->curx - 1, ' ');
wmove(win, win->cury, win->curx - 1);
} else {
if (remain) {
str++;
remain--;
} else {
mvwaddch(win, win->cury, win->curx - 1, ' ');
wmove(win, win->cury, win->curx - 1);
}
}
}
if (c == ERR) {
*str = '\0';
return (ERR);
}
*str = '\0';
return (OK);
}