release/src/router/libncurses/ncurses/tinfo/lib_acs.c

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   2  * Copyright (c) 1998-2013,2014 Free Software Foundation, Inc.              *
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  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  *     and: Juergen Pfeifer                         2008                    *
  34  ****************************************************************************/
  35
  36 #include <curses.priv.h>
  37
  38 #ifndef CUR
  39 #define CUR SP_TERMTYPE
  40 #endif
  41
  42 MODULE_ID("$Id: lib_acs.c,v 1.45 2014/03/08 20:32:59 tom Exp $")
  43
  44 #if BROKEN_LINKER || USE_REENTRANT
  45 #define MyBuffer _nc_prescreen.real_acs_map
  46 NCURSES_EXPORT(chtype *)
  47 NCURSES_PUBLIC_VAR(acs_map) (void)
  48 {
  49     if (MyBuffer == 0)
  50         MyBuffer = typeCalloc(chtype, ACS_LEN);
  51     return MyBuffer;
  52 }
  53 #undef MyBuffer
  54 #else
  55 NCURSES_EXPORT_VAR (chtype) acs_map[ACS_LEN] =
  56 {
  57     0
  58 };
  59 #endif
  60
  61 #ifdef USE_TERM_DRIVER
  62 NCURSES_EXPORT(chtype)
  63 NCURSES_SP_NAME(_nc_acs_char) (NCURSES_SP_DCLx int c)
  64 {
  65     chtype *map;
  66     if (c < 0 || c >= ACS_LEN)
  67         return (chtype) 0;
  68     map = (SP_PARM != 0) ? SP_PARM->_acs_map :
  69 #if BROKEN_LINKER || USE_REENTRANT
  70         _nc_prescreen.real_acs_map
  71 #else
  72         acs_map
  73 #endif
  74         ;
  75     return map[c];
  76 }
  77 #endif /* USE_TERM_DRIVER */
  78
  79 NCURSES_EXPORT(void)
  80 NCURSES_SP_NAME(_nc_init_acs) (NCURSES_SP_DCL0)
  81 {
  82     chtype *fake_map = acs_map;
  83     chtype *real_map = SP_PARM != 0 ? SP_PARM->_acs_map : fake_map;
  84     int j;
  85
  86     T(("initializing ACS map"));
  87
  88     /*
  89      * If we're using this from curses (rather than terminfo), we are storing
  90      * the mapping information in the SCREEN struct so we can decide how to
  91      * render it.
  92      */
  93     if (real_map != fake_map) {
  94         for (j = 1; j < ACS_LEN; ++j) {
  95             real_map[j] = 0;
  96             fake_map[j] = A_ALTCHARSET | (chtype) j;
  97             if (SP_PARM)
  98                 SP_PARM->_screen_acs_map[j] = FALSE;
  99         }
 100     } else {
 101         for (j = 1; j < ACS_LEN; ++j) {
 102             real_map[j] = 0;
 103         }
 104     }
 105
 106     /*
 107      * Initializations for a UNIX-like multi-terminal environment.  Use
 108      * ASCII chars and count on the terminfo description to do better.
 109      */
 110     real_map['l'] = '+';        /* should be upper left corner */
 111     real_map['m'] = '+';        /* should be lower left corner */
 112     real_map['k'] = '+';        /* should be upper right corner */
 113     real_map['j'] = '+';        /* should be lower right corner */
 114     real_map['u'] = '+';        /* should be tee pointing left */
 115     real_map['t'] = '+';        /* should be tee pointing right */
 116     real_map['v'] = '+';        /* should be tee pointing up */
 117     real_map['w'] = '+';        /* should be tee pointing down */
 118     real_map['q'] = '-';        /* should be horizontal line */
 119     real_map['x'] = '|';        /* should be vertical line */
 120     real_map['n'] = '+';        /* should be large plus or crossover */
 121     real_map['o'] = '~';        /* should be scan line 1 */
 122     real_map['s'] = '_';        /* should be scan line 9 */
 123     real_map['`'] = '+';        /* should be diamond */
 124     real_map['a'] = ':';        /* should be checker board (stipple) */
 125     real_map['f'] = '\'';       /* should be degree symbol */
 126     real_map['g'] = '#';        /* should be plus/minus */
 127     real_map['~'] = 'o';        /* should be bullet */
 128     real_map[','] = '<';        /* should be arrow pointing left */
 129     real_map['+'] = '>';        /* should be arrow pointing right */
 130     real_map['.'] = 'v';        /* should be arrow pointing down */
 131     real_map['-'] = '^';        /* should be arrow pointing up */
 132     real_map['h'] = '#';        /* should be board of squares */
 133     real_map['i'] = '#';        /* should be lantern symbol */
 134     real_map['0'] = '#';        /* should be solid square block */
 135     /* these defaults were invented for ncurses */
 136     real_map['p'] = '-';        /* should be scan line 3 */
 137     real_map['r'] = '-';        /* should be scan line 7 */
 138     real_map['y'] = '<';        /* should be less-than-or-equal-to */
 139     real_map['z'] = '>';        /* should be greater-than-or-equal-to */
 140     real_map['{'] = '*';        /* should be greek pi */
 141     real_map['|'] = '!';        /* should be not-equal */
 142     real_map['}'] = 'f';        /* should be pound-sterling symbol */
 143     /* thick-line-drawing */
 144     real_map['L'] = '+';        /* upper left corner */
 145     real_map['M'] = '+';        /* lower left corner */
 146     real_map['K'] = '+';        /* upper right corner */
 147     real_map['J'] = '+';        /* lower right corner */
 148     real_map['T'] = '+';        /* tee pointing left */
 149     real_map['U'] = '+';        /* tee pointing right */
 150     real_map['V'] = '+';        /* tee pointing up */
 151     real_map['W'] = '+';        /* tee pointing down */
 152     real_map['Q'] = '-';        /* horizontal line */
 153     real_map['X'] = '|';        /* vertical line */
 154     real_map['N'] = '+';        /* large plus or crossover */
 155     /* double-line-drawing */
 156     real_map['C'] = '+';        /* upper left corner */
 157     real_map['D'] = '+';        /* lower left corner */
 158     real_map['B'] = '+';        /* upper right corner */
 159     real_map['A'] = '+';        /* lower right corner */
 160     real_map['G'] = '+';        /* tee pointing left */
 161     real_map['F'] = '+';        /* tee pointing right */
 162     real_map['H'] = '+';        /* tee pointing up */
 163     real_map['I'] = '+';        /* tee pointing down */
 164     real_map['R'] = '-';        /* horizontal line */
 165     real_map['Y'] = '|';        /* vertical line */
 166     real_map['E'] = '+';        /* large plus or crossover */
 167
 168 #ifdef USE_TERM_DRIVER
 169     CallDriver_2(SP_PARM, td_initacs, real_map, fake_map);
 170 #else
 171     if (ena_acs != NULL) {
 172         NCURSES_PUTP2("ena_acs", ena_acs);
 173     }
 174 #if NCURSES_EXT_FUNCS
 175     /*
 176      * Linux console "supports" the "PC ROM" character set by the coincidence
 177      * that smpch/rmpch and smacs/rmacs have the same values.  ncurses has
 178      * no codepage support (see SCO Merge for an example).  Outside of the
 179      * values defined in acsc, there are no definitions for the "PC ROM"
 180      * character set (assumed by some applications to be codepage 437), but we
 181      * allow those applications to use those codepoints.
 182      *
 183      * test/blue.c uses this feature.
 184      */
 185 #define PCH_KLUDGE(a,b) (a != 0 && b != 0 && !strcmp(a,b))
 186     if (PCH_KLUDGE(enter_pc_charset_mode, enter_alt_charset_mode) &&
 187         PCH_KLUDGE(exit_pc_charset_mode, exit_alt_charset_mode)) {
 188         size_t i;
 189         for (i = 1; i < ACS_LEN; ++i) {
 190             if (real_map[i] == 0) {
 191                 real_map[i] = (chtype) i;
 192                 if (real_map != fake_map) {
 193                     if (SP != 0)
 194                         SP->_screen_acs_map[i] = TRUE;
 195                 }
 196             }
 197         }
 198     }
 199 #endif
 200
 201     if (acs_chars != NULL) {
 202         size_t i = 0;
 203         size_t length = strlen(acs_chars);
 204
 205         while (i + 1 < length) {
 206             if (acs_chars[i] != 0 && UChar(acs_chars[i]) < ACS_LEN) {
 207                 real_map[UChar(acs_chars[i])] = UChar(acs_chars[i + 1]) | A_ALTCHARSET;
 208                 if (SP != 0)
 209                     SP->_screen_acs_map[UChar(acs_chars[i])] = TRUE;
 210             }
 211             i += 2;
 212         }
 213     }
 214 #ifdef TRACE
 215     /* Show the equivalent mapping, noting if it does not match the
 216      * given attribute, whether by re-ordering or duplication.
 217      */
 218     if (USE_TRACEF(TRACE_CALLS)) {
 219         size_t n, m;
 220         char show[ACS_LEN * 2 + 1];
 221         for (n = 1, m = 0; n < ACS_LEN; n++) {
 222             if (real_map[n] != 0) {
 223                 show[m++] = (char) n;
 224                 show[m++] = (char) ChCharOf(real_map[n]);
 225             }
 226         }
 227         show[m] = 0;
 228         if (acs_chars == NULL || strcmp(acs_chars, show))
 229             _tracef("%s acs_chars %s",
 230                     (acs_chars == NULL) ? "NULL" : "READ",
 231                     _nc_visbuf(acs_chars));
 232         _tracef("%s acs_chars %s",
 233                 (acs_chars == NULL)
 234                 ? "NULL"
 235                 : (strcmp(acs_chars, show)
 236                    ? "DIFF"
 237                    : "SAME"),
 238                 _nc_visbuf(show));
 239         _nc_unlock_global(tracef);
 240     }
 241 #endif /* TRACE */
 242 #endif
 243 }
 244
 245 #if NCURSES_SP_FUNCS
 246 NCURSES_EXPORT(void)
 247 _nc_init_acs(void)
 248 {
 249     NCURSES_SP_NAME(_nc_init_acs) (CURRENT_SCREEN);
 250 }
 251 #endif