aboutsummaryrefslogtreecommitdiff
path: root/contrib/ncurses/ncurses/tinfo/lib_acs.c
blob: 6a24285460b3401cc78d078e121f595c7f6bf37d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/****************************************************************************
 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

#include <curses.priv.h>
#include <term.h>		/* ena_acs, acs_chars */

MODULE_ID("$Id: lib_acs.c,v 1.34 2007/09/29 20:37:13 tom Exp $")

#if BROKEN_LINKER || USE_REENTRANT
#define MyBuffer _nc_prescreen.real_acs_map
NCURSES_EXPORT_VAR(chtype *)
_nc_acs_map(void)
{
    if (MyBuffer == 0)
	MyBuffer = typeCalloc(chtype, ACS_LEN);
    return MyBuffer;
}
#undef MyBuffer
#else
NCURSES_EXPORT_VAR(chtype) acs_map[ACS_LEN] =
{
    0
};
#endif

NCURSES_EXPORT(void)
_nc_init_acs(void)
{
    chtype *fake_map = acs_map;
    chtype *real_map = SP != 0 ? SP->_acs_map : fake_map;
    int j;

    T(("initializing ACS map"));

    /*
     * If we're using this from curses (rather than terminfo), we are storing
     * the mapping information in the SCREEN struct so we can decide how to
     * render it.
     */
    if (real_map != fake_map) {
	for (j = 1; j < ACS_LEN; ++j) {
	    real_map[j] = 0;
	    fake_map[j] = A_ALTCHARSET | j;
	    SP->_screen_acs_map[j] = FALSE;
	}
    } else {
	for (j = 1; j < ACS_LEN; ++j) {
	    real_map[j] = 0;
	}
    }

    /*
     * Initializations for a UNIX-like multi-terminal environment.  Use
     * ASCII chars and count on the terminfo description to do better.
     */
    real_map['l'] = '+';	/* should be upper left corner */
    real_map['m'] = '+';	/* should be lower left corner */
    real_map['k'] = '+';	/* should be upper right corner */
    real_map['j'] = '+';	/* should be lower right corner */
    real_map['u'] = '+';	/* should be tee pointing left */
    real_map['t'] = '+';	/* should be tee pointing right */
    real_map['v'] = '+';	/* should be tee pointing up */
    real_map['w'] = '+';	/* should be tee pointing down */
    real_map['q'] = '-';	/* should be horizontal line */
    real_map['x'] = '|';	/* should be vertical line */
    real_map['n'] = '+';	/* should be large plus or crossover */
    real_map['o'] = '~';	/* should be scan line 1 */
    real_map['s'] = '_';	/* should be scan line 9 */
    real_map['`'] = '+';	/* should be diamond */
    real_map['a'] = ':';	/* should be checker board (stipple) */
    real_map['f'] = '\'';	/* should be degree symbol */
    real_map['g'] = '#';	/* should be plus/minus */
    real_map['~'] = 'o';	/* should be bullet */
    real_map[','] = '<';	/* should be arrow pointing left */
    real_map['+'] = '>';	/* should be arrow pointing right */
    real_map['.'] = 'v';	/* should be arrow pointing down */
    real_map['-'] = '^';	/* should be arrow pointing up */
    real_map['h'] = '#';	/* should be board of squares */
    real_map['i'] = '#';	/* should be lantern symbol */
    real_map['0'] = '#';	/* should be solid square block */
    /* these defaults were invented for ncurses */
    real_map['p'] = '-';	/* should be scan line 3 */
    real_map['r'] = '-';	/* should be scan line 7 */
    real_map['y'] = '<';	/* should be less-than-or-equal-to */
    real_map['z'] = '>';	/* should be greater-than-or-equal-to */
    real_map['{'] = '*';	/* should be greek pi */
    real_map['|'] = '!';	/* should be not-equal */
    real_map['}'] = 'f';	/* should be pound-sterling symbol */

    if (ena_acs != NULL) {
	TPUTS_TRACE("ena_acs");
	putp(ena_acs);
    }
#if NCURSES_EXT_FUNCS
    /*
     * Linux console "supports" the "PC ROM" character set by the coincidence
     * that smpch/rmpch and smacs/rmacs have the same values.  ncurses has
     * no codepage support (see SCO Merge for an example).  Outside of the
     * values defined in acsc, there are no definitions for the "PC ROM"
     * character set (assumed by some applications to be codepage 437), but we
     * allow those applications to use those codepoints.
     *
     * test/blue.c uses this feature.
     */
#define PCH_KLUDGE(a,b) (a != 0 && b != 0 && !strcmp(a,b))
    if (PCH_KLUDGE(enter_pc_charset_mode, enter_alt_charset_mode) &&
	PCH_KLUDGE(exit_pc_charset_mode, exit_alt_charset_mode)) {
	size_t i;
	for (i = 1; i < ACS_LEN; ++i) {
	    if (real_map[i] == 0) {
		real_map[i] = i;
		if (real_map != fake_map) {
		    if (SP != 0)
			SP->_screen_acs_map[i] = TRUE;
		}
	    }
	}
    }
#endif

    if (acs_chars != NULL) {
	size_t i = 0;
	size_t length = strlen(acs_chars);

	while (i + 1 < length) {
	    if (acs_chars[i] != 0 && UChar(acs_chars[i]) < ACS_LEN) {
		real_map[UChar(acs_chars[i])] = UChar(acs_chars[i + 1]) | A_ALTCHARSET;
		if (SP != 0)
		    SP->_screen_acs_map[UChar(acs_chars[i])] = TRUE;
	    }
	    i += 2;
	}
    }
#ifdef TRACE
    /* Show the equivalent mapping, noting if it does not match the
     * given attribute, whether by re-ordering or duplication.
     */
    if (USE_TRACEF(TRACE_CALLS)) {
	size_t n, m;
	char show[ACS_LEN * 2 + 1];
	for (n = 1, m = 0; n < ACS_LEN; n++) {
	    if (real_map[n] != 0) {
		show[m++] = (char) n;
		show[m++] = ChCharOf(real_map[n]);
	    }
	}
	show[m] = 0;
	if (acs_chars == NULL || strcmp(acs_chars, show))
	    _tracef("%s acs_chars %s",
		    (acs_chars == NULL) ? "NULL" : "READ",
		    _nc_visbuf(acs_chars));
	_tracef("%s acs_chars %s",
		(acs_chars == NULL)
		? "NULL"
		: (strcmp(acs_chars, show)
		   ? "DIFF"
		   : "SAME"),
		_nc_visbuf(show));
	_nc_unlock_global(tracef);
    }
#endif /* TRACE */
}