lib_acs.c revision 174993
1/**************************************************************************** 2 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 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 * * 12 * The above copyright notice and this permission notice shall be included * 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, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 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: Thomas E. Dickey 1996-on * 33 ****************************************************************************/ 34 35#include <curses.priv.h> 36#include <term.h> /* ena_acs, acs_chars */ 37 38MODULE_ID("$Id: lib_acs.c,v 1.34 2007/09/29 20:37:13 tom Exp $") 39 40#if BROKEN_LINKER || USE_REENTRANT 41#define MyBuffer _nc_prescreen.real_acs_map 42NCURSES_EXPORT_VAR(chtype *) 43_nc_acs_map(void) 44{ 45 if (MyBuffer == 0) 46 MyBuffer = typeCalloc(chtype, ACS_LEN); 47 return MyBuffer; 48} 49#undef MyBuffer 50#else 51NCURSES_EXPORT_VAR(chtype) acs_map[ACS_LEN] = 52{ 53 0 54}; 55#endif 56 57NCURSES_EXPORT(void) 58_nc_init_acs(void) 59{ 60 chtype *fake_map = acs_map; 61 chtype *real_map = SP != 0 ? SP->_acs_map : fake_map; 62 int j; 63 64 T(("initializing ACS map")); 65 66 /* 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 69 * render it. 70 */ 71 if (real_map != fake_map) { 72 for (j = 1; j < ACS_LEN; ++j) { 73 real_map[j] = 0; 74 fake_map[j] = A_ALTCHARSET | j; 75 SP->_screen_acs_map[j] = FALSE; 76 } 77 } else { 78 for (j = 1; j < ACS_LEN; ++j) { 79 real_map[j] = 0; 80 } 81 } 82 83 /* 84 * Initializations for a UNIX-like multi-terminal environment. Use 85 * ASCII chars and count on the terminfo description to do better. 86 */ 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 */ 120 121 if (ena_acs != NULL) { 122 TPUTS_TRACE("ena_acs"); 123 putp(ena_acs); 124 } 125#if NCURSES_EXT_FUNCS 126 /* 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. 133 * 134 * test/blue.c uses this feature. 135 */ 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)) { 139 size_t i; 140 for (i = 1; i < ACS_LEN; ++i) { 141 if (real_map[i] == 0) { 142 real_map[i] = i; 143 if (real_map != fake_map) { 144 if (SP != 0) 145 SP->_screen_acs_map[i] = TRUE; 146 } 147 } 148 } 149 } 150#endif 151 152 if (acs_chars != NULL) { 153 size_t i = 0; 154 size_t length = strlen(acs_chars); 155 156 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; 159 if (SP != 0) 160 SP->_screen_acs_map[UChar(acs_chars[i])] = TRUE; 161 } 162 i += 2; 163 } 164 } 165#ifdef TRACE 166 /* Show the equivalent mapping, noting if it does not match the 167 * given attribute, whether by re-ordering or duplication. 168 */ 169 if (USE_TRACEF(TRACE_CALLS)) { 170 size_t n, m; 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]); 176 } 177 } 178 show[m] = 0; 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", 184 (acs_chars == NULL) 185 ? "NULL" 186 : (strcmp(acs_chars, show) 187 ? "DIFF" 188 : "SAME"), 189 _nc_visbuf(show)); 190 _nc_unlock_global(tracef); 191 } 192#endif /* TRACE */ 193} 194