wgetstr.c

操作系统SunOS 4.1.3版本的源码

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ifndef lint
static	char sccsid[] = "@(#)wgetstr.c 1.1 92/07/30 SMI"; /* from S5R3.1 1.3 */
#endif

#include	"curses_inc.h"
#define		LENGTH	256

/* This routine gets a string starting at (_cury, _curx) */

wgetstr(win, str)
WINDOW	*win;
char	*str;
{
    return ((wgetnstr(win, str, LENGTH) == ERR) ? ERR : OK);
}

wgetnstr(win, str, n)
register	WINDOW		*win;
char		*str;
register	int	n;
{
    register	int	cpos = 0, ch;
    register	char	*cp = str;
    int			i, total = 0;
    char		myerase, mykill;
    char		rownum[LENGTH], colnum[LENGTH], length[LENGTH];
    int			doecho = SP->fl_echoit;
    int			savecb = cur_term->_fl_rawmode;
    int			savsync, savimmed, savleave;

#ifdef	DEBUG
    if (outf)
	fprintf(outf, "doecho %d, savecb %d\n", doecho, savecb);
#endif	/* DEBUG */

    myerase = erasechar();
    mykill = killchar();
    if (!savecb)
	cbreak();

    if (doecho)
    {
	SP->fl_echoit = FALSE;
	savsync = win->_sync;
	savimmed = win->_immed;
	savleave = win->_leave;
	win->_immed = win->_sync = win->_leave = FALSE;
	(void) wrefresh(win);
	if (n > LENGTH)
	    n = LENGTH;
    }
    n--;

    while (cpos < n)
    {
	if (doecho)
	{
	    rownum[cpos] = win->_cury;
	    colnum[cpos] = win->_curx;
	}

	ch = wgetch(win);
	if ((ch == ERR) || (ch == '\n') || (ch == '\r') || (ch == KEY_ENTER))
	    break;
	if ((ch == myerase) || (ch == KEY_LEFT) || (ch == KEY_BACKSPACE) ||
	    (ch == mykill))
	{
	    if (cpos > 0)
	    {
		if (ch == mykill)
		{
		    i = total;
		    total = cpos = 0;
		    cp = str;
		}
		else
		{
		    cp--;
		    cpos--;
		    if (doecho)
			total -= (i = length[cpos]);
		}
		if (doecho)
		{
		    (void) wmove(win, rownum[cpos], colnum[cpos]);
		    /* Add the correct amount of blanks. */
		    for ( ; i > 0; i--)
			(void) waddch (win, ' ');
		    /* Move back after the blanks are put in. */
		    (void) wmove(win, rownum[cpos], colnum[cpos]);
		    /* Update total. */
		    (void) wrefresh(win);
		}
	    }
	    else
		if (doecho)
		    beep();
	}
	else
	    if (ch >= KEY_BREAK)
		beep();
	    else
	    {
		*cp++ = ch;
		if (doecho)
		{
		    /* Add the length of the */
		    /* character to total. */
		    if (ch >= ' ')
			length[cpos] = 1;
		    else
			if (ch == '\t')
			    length[cpos] = TABSIZE - (colnum[cpos] % TABSIZE);
			else
			    length[cpos] = 2;
		    total += length[cpos];
		    (void) wechochar(win, (chtype) ch);
		}
		cpos++;
	    }
    }

    *cp = '\0';

    if (!savecb)
	nocbreak();
    /*
     * The following code is equivalent to waddch(win, '\n')
     * except that it does not do a wclrtoeol.
     */
    if (doecho)
    {
	SP->fl_echoit = TRUE;
	win->_curx = 0;
	if (win->_cury + 1 > win->_bmarg)
	    (void) wscrl(win, 1);
	else
	    win->_cury++;

	win->_sync = savsync;
	win->_immed = savimmed;
	win->_leave = savleave;
	(void) wrefresh(win);
    }
    return (ch);
}