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/* $OpenBSD: lib_acs.c,v 1.5 2010/01/12 23:22:06 nicm Exp $ */
/****************************************************************************
* Copyright (c) 1998-2007,2008 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 1.5 2010/01/12 23:22:06 nicm 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;
if (SP)
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++] = (char) 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 */
}
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