1/****************************************************************************
2 * Copyright (c) 1998-2005,2008 Free Software Foundation, Inc.              *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
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13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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22 *                                                                          *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 *     and: Sven Verdoolaege                                                *
33 *     and: Thomas E. Dickey                                                *
34 ****************************************************************************/
35
36/*
37**	lib_insch.c
38**
39**	The routine winsch().
40**
41*/
42
43#include <curses.priv.h>
44#include <ctype.h>
45
46MODULE_ID("$Id: lib_insch.c,v 1.25 2008/02/03 00:14:37 tom Exp $")
47
48/*
49 * Insert the given character, updating the current location to simplify
50 * inserting a string.
51 */
52NCURSES_EXPORT(int)
53_nc_insert_ch(WINDOW *win, chtype ch)
54{
55    int code = OK;
56    NCURSES_CH_T wch;
57    int count;
58    NCURSES_CONST char *s;
59
60    switch (ch) {
61    case '\t':
62	for (count = (TABSIZE - (win->_curx % TABSIZE)); count > 0; count--) {
63	    if ((code = _nc_insert_ch(win, ' ')) != OK)
64		break;
65	}
66	break;
67    case '\n':
68    case '\r':
69    case '\b':
70	SetChar2(wch, ch);
71	_nc_waddch_nosync(win, wch);
72	break;
73    default:
74	if (
75#if USE_WIDEC_SUPPORT
76	       WINDOW_EXT(win, addch_used) == 0 &&
77#endif
78	       is8bits(ChCharOf(ch)) &&
79	       isprint(ChCharOf(ch))) {
80	    if (win->_curx <= win->_maxx) {
81		struct ldat *line = &(win->_line[win->_cury]);
82		NCURSES_CH_T *end = &(line->text[win->_curx]);
83		NCURSES_CH_T *temp1 = &(line->text[win->_maxx]);
84		NCURSES_CH_T *temp2 = temp1 - 1;
85
86		SetChar2(wch, ch);
87
88		CHANGED_TO_EOL(line, win->_curx, win->_maxx);
89		while (temp1 > end)
90		    *temp1-- = *temp2--;
91
92		*temp1 = _nc_render(win, wch);
93		win->_curx++;
94	    }
95	} else if (is8bits(ChCharOf(ch)) && iscntrl(ChCharOf(ch))) {
96	    s = unctrl(ChCharOf(ch));
97	    while (*s != '\0') {
98		code = _nc_insert_ch(win, ChAttrOf(ch) | UChar(*s));
99		if (code != OK)
100		    break;
101		++s;
102	    }
103	}
104#if USE_WIDEC_SUPPORT
105	else {
106	    /*
107	     * Handle multibyte characters here
108	     */
109	    SetChar2(wch, ch);
110	    wch = _nc_render(win, wch);
111	    count = _nc_build_wch(win, &wch);
112	    if (count > 0) {
113		code = wins_wch(win, &wch);
114	    } else if (count == -1) {
115		/* handle EILSEQ */
116		if (is8bits(ch)) {
117		    s = unctrl(ChCharOf(ch));
118		    while (*s != '\0') {
119			code = _nc_insert_ch(win, ChAttrOf(ch) | UChar(*s));
120			if (code != OK)
121			    break;
122			++s;
123		    }
124		} else {
125		    code = ERR;
126		}
127	    }
128	}
129#endif
130	break;
131    }
132    return code;
133}
134
135NCURSES_EXPORT(int)
136winsch(WINDOW *win, chtype c)
137{
138    NCURSES_SIZE_T oy;
139    NCURSES_SIZE_T ox;
140    int code = ERR;
141
142    T((T_CALLED("winsch(%p, %s)"), win, _tracechtype(c)));
143
144    if (win != 0) {
145	oy = win->_cury;
146	ox = win->_curx;
147
148	code = _nc_insert_ch(win, c);
149
150	win->_curx = ox;
151	win->_cury = oy;
152	_nc_synchook(win);
153    }
154    returnCode(code);
155}
156