1 /****************************************************************************
2 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
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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: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 ****************************************************************************/
35 #include <curses.priv.h>
36 #include <term.h> /* ena_acs, acs_chars */
38 MODULE_ID("$Id: lib_acs.c,v 1.34 2007/09/29 20:37:13 tom Exp $")
40 #if BROKEN_LINKER || USE_REENTRANT
41 #define MyBuffer _nc_prescreen.real_acs_map
42 NCURSES_EXPORT_VAR(chtype *)
46 MyBuffer = typeCalloc(chtype, ACS_LEN);
51 NCURSES_EXPORT_VAR(chtype) acs_map[ACS_LEN] =
60 chtype *fake_map = acs_map;
61 chtype *real_map = SP != 0 ? SP->_acs_map : fake_map;
64 T(("initializing ACS map"));
67 * If we're using this from curses (rather than terminfo), we are storing
68 * the mapping information in the SCREEN struct so we can decide how to
71 if (real_map != fake_map) {
72 for (j = 1; j < ACS_LEN; ++j) {
74 fake_map[j] = A_ALTCHARSET | j;
75 SP->_screen_acs_map[j] = FALSE;
78 for (j = 1; j < ACS_LEN; ++j) {
84 * Initializations for a UNIX-like multi-terminal environment. Use
85 * ASCII chars and count on the terminfo description to do better.
87 real_map['l'] = '+'; /* should be upper left corner */
88 real_map['m'] = '+'; /* should be lower left corner */
89 real_map['k'] = '+'; /* should be upper right corner */
90 real_map['j'] = '+'; /* should be lower right corner */
91 real_map['u'] = '+'; /* should be tee pointing left */
92 real_map['t'] = '+'; /* should be tee pointing right */
93 real_map['v'] = '+'; /* should be tee pointing up */
94 real_map['w'] = '+'; /* should be tee pointing down */
95 real_map['q'] = '-'; /* should be horizontal line */
96 real_map['x'] = '|'; /* should be vertical line */
97 real_map['n'] = '+'; /* should be large plus or crossover */
98 real_map['o'] = '~'; /* should be scan line 1 */
99 real_map['s'] = '_'; /* should be scan line 9 */
100 real_map['`'] = '+'; /* should be diamond */
101 real_map['a'] = ':'; /* should be checker board (stipple) */
102 real_map['f'] = '\''; /* should be degree symbol */
103 real_map['g'] = '#'; /* should be plus/minus */
104 real_map['~'] = 'o'; /* should be bullet */
105 real_map[','] = '<'; /* should be arrow pointing left */
106 real_map['+'] = '>'; /* should be arrow pointing right */
107 real_map['.'] = 'v'; /* should be arrow pointing down */
108 real_map['-'] = '^'; /* should be arrow pointing up */
109 real_map['h'] = '#'; /* should be board of squares */
110 real_map['i'] = '#'; /* should be lantern symbol */
111 real_map['0'] = '#'; /* should be solid square block */
112 /* these defaults were invented for ncurses */
113 real_map['p'] = '-'; /* should be scan line 3 */
114 real_map['r'] = '-'; /* should be scan line 7 */
115 real_map['y'] = '<'; /* should be less-than-or-equal-to */
116 real_map['z'] = '>'; /* should be greater-than-or-equal-to */
117 real_map['{'] = '*'; /* should be greek pi */
118 real_map['|'] = '!'; /* should be not-equal */
119 real_map['}'] = 'f'; /* should be pound-sterling symbol */
121 if (ena_acs != NULL) {
122 TPUTS_TRACE("ena_acs");
125 #if NCURSES_EXT_FUNCS
127 * Linux console "supports" the "PC ROM" character set by the coincidence
128 * that smpch/rmpch and smacs/rmacs have the same values. ncurses has
129 * no codepage support (see SCO Merge for an example). Outside of the
130 * values defined in acsc, there are no definitions for the "PC ROM"
131 * character set (assumed by some applications to be codepage 437), but we
132 * allow those applications to use those codepoints.
134 * test/blue.c uses this feature.
136 #define PCH_KLUDGE(a,b) (a != 0 && b != 0 && !strcmp(a,b))
137 if (PCH_KLUDGE(enter_pc_charset_mode, enter_alt_charset_mode) &&
138 PCH_KLUDGE(exit_pc_charset_mode, exit_alt_charset_mode)) {
140 for (i = 1; i < ACS_LEN; ++i) {
141 if (real_map[i] == 0) {
143 if (real_map != fake_map) {
145 SP->_screen_acs_map[i] = TRUE;
152 if (acs_chars != NULL) {
154 size_t length = strlen(acs_chars);
156 while (i + 1 < length) {
157 if (acs_chars[i] != 0 && UChar(acs_chars[i]) < ACS_LEN) {
158 real_map[UChar(acs_chars[i])] = UChar(acs_chars[i + 1]) | A_ALTCHARSET;
160 SP->_screen_acs_map[UChar(acs_chars[i])] = TRUE;
166 /* Show the equivalent mapping, noting if it does not match the
167 * given attribute, whether by re-ordering or duplication.
169 if (USE_TRACEF(TRACE_CALLS)) {
171 char show[ACS_LEN * 2 + 1];
172 for (n = 1, m = 0; n < ACS_LEN; n++) {
173 if (real_map[n] != 0) {
174 show[m++] = (char) n;
175 show[m++] = ChCharOf(real_map[n]);
179 if (acs_chars == NULL || strcmp(acs_chars, show))
180 _tracef("%s acs_chars %s",
181 (acs_chars == NULL) ? "NULL" : "READ",
182 _nc_visbuf(acs_chars));
183 _tracef("%s acs_chars %s",
186 : (strcmp(acs_chars, show)
190 _nc_unlock_global(tracef);