lib/tty/tty-slang.c

   1 /*
   2    Interface to the terminal controlling library.
   3    Slang wrapper.
   4
   5    Copyright (C) 2005-2024
   6    Free Software Foundation, Inc.
   7
   8    Written by:
   9    Andrew Borodin <aborodin@vmail.ru>, 2009
  10    Egmont Koblinger <egmont@gmail.com>, 2010
  11
  12    This file is part of the Midnight Commander.
  13
  14    The Midnight Commander is free software: you can redistribute it
  15    and/or modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation, either version 3 of the License,
  17    or (at your option) any later version.
  18
  19    The Midnight Commander is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28 /** \file
  29  *  \brief Source: S-Lang-based tty layer of Midnight Commander
  30  */
  31
  32 #include <config.h>
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <sys/types.h>          /* size_t */
  38 #include <unistd.h>
  39 #ifdef HAVE_SYS_IOCTL_H
  40 #include <sys/ioctl.h>
  41 #endif
  42 #include <termios.h>
  43
  44 #include "lib/global.h"
  45 #include "lib/strutil.h"        /* str_term_form */
  46 #include "lib/util.h"           /* is_printable() */
  47
  48 #include "tty-internal.h"       /* mc_tty_normalize_from_utf8() */
  49 #include "tty.h"
  50 #include "color.h"
  51 #include "color-slang.h"
  52 #include "color-internal.h"
  53 #include "mouse.h"              /* Gpm_Event is required in key.h */
  54 #include "key.h"                /* define_sequence */
  55 #include "win.h"
  56
  57
  58 /*** global variables ****************************************************************************/
  59
  60 /* If true program softkeys (HP terminals only) on startup and after every
  61    command ran in the subshell to the description found in the termcap/terminfo
  62    database */
  63 int reset_hp_softkeys = 0;
  64
  65 /*** file scope macro definitions ****************************************************************/
  66
  67 #ifndef SLTT_MAX_SCREEN_COLS
  68 #define SLTT_MAX_SCREEN_COLS 512
  69 #endif
  70
  71 #ifndef SLTT_MAX_SCREEN_ROWS
  72 #define SLTT_MAX_SCREEN_ROWS 512
  73 #endif
  74
  75 /*** file scope type declarations ****************************************************************/
  76
  77 /*** forward declarations (file scope functions) *************************************************/
  78
  79 /*** file scope variables ************************************************************************/
  80
  81 /* Various saved termios settings that we control here */
  82 static struct termios boot_mode;
  83 static struct termios new_mode;
  84
  85 /* Controls whether we should wait for input in tty_lowlevel_getch */
  86 static gboolean no_slang_delay;
  87
  88 static gboolean slsmg_active = FALSE;
  89
  90 /* This table describes which capabilities we want and which values we
  91  * assign to them.
  92  */
  93 static const struct
  94 {
  95     int key_code;
  96     const char *key_name;
  97 } key_table[] =
  98 {
  99     /* *INDENT-OFF* */
 100     { KEY_F (0), "k0" },
 101     { KEY_F (1), "k1" },
 102     { KEY_F (2), "k2" },
 103     { KEY_F (3), "k3" },
 104     { KEY_F (4), "k4" },
 105     { KEY_F (5), "k5" },
 106     { KEY_F (6), "k6" },
 107     { KEY_F (7), "k7" },
 108     { KEY_F (8), "k8" },
 109     { KEY_F (9), "k9" },
 110     { KEY_F (10), "k;" },
 111     { KEY_F (11), "F1" },
 112     { KEY_F (12), "F2" },
 113     { KEY_F (13), "F3" },
 114     { KEY_F (14), "F4" },
 115     { KEY_F (15), "F5" },
 116     { KEY_F (16), "F6" },
 117     { KEY_F (17), "F7" },
 118     { KEY_F (18), "F8" },
 119     { KEY_F (19), "F9" },
 120     { KEY_F (20), "FA" },
 121     { KEY_IC, "kI" },
 122     { KEY_NPAGE, "kN" },
 123     { KEY_PPAGE, "kP" },
 124     { KEY_LEFT, "kl" },
 125     { KEY_RIGHT, "kr" },
 126     { KEY_UP, "ku" },
 127     { KEY_DOWN, "kd" },
 128     { KEY_DC, "kD" },
 129     { KEY_BACKSPACE, "kb" },
 130     { KEY_HOME, "kh" },
 131     { KEY_END, "@7" },
 132     { 0, NULL }
 133     /* *INDENT-ON* */
 134 };
 135
 136 /* --------------------------------------------------------------------------------------------- */
 137 /*** file scope functions ************************************************************************/
 138 /* --------------------------------------------------------------------------------------------- */
 139
 140 static void
 141 tty_setup_sigwinch (void (*handler) (int))
 142 {
 143     (void) SLsignal (SIGWINCH, handler);
 144     tty_create_winch_pipe ();
 145 }
 146
 147 /* --------------------------------------------------------------------------------------------- */
 148
 149 static void
 150 sigwinch_handler (int dummy)
 151 {
 152     ssize_t n = 0;
 153
 154     (void) dummy;
 155
 156     n = write (sigwinch_pipe[1], "", 1);
 157     (void) n;
 158
 159     (void) SLsignal (SIGWINCH, sigwinch_handler);
 160 }
 161
 162 /* --------------------------------------------------------------------------------------------- */
 163
 164 /* HP Terminals have capabilities (pfkey, pfloc, pfx) to program function keys.
 165    elm 2.4pl15 invoked with the -K option utilizes these softkeys and the
 166    consequence is that function keys don't work in MC sometimes...
 167    Unfortunately I don't now the one and only escape sequence to turn off.
 168    softkeys (elm uses three different capabilities to turn on softkeys and two.
 169    capabilities to turn them off)..
 170    Among other things elm uses the pair we already use in slang_keypad. That's.
 171    the reason why I call slang_reset_softkeys from slang_keypad. In lack of
 172    something better the softkeys are programmed to their defaults from the
 173    termcap/terminfo database.
 174    The escape sequence to program the softkeys is taken from elm and it is.
 175    hardcoded because neither slang nor ncurses 4.1 know how to 'printf' this.
 176    sequence. -- Norbert
 177  */
 178
 179 static void
 180 slang_reset_softkeys (void)
 181 {
 182     int key;
 183     static const char display[] = "                ";
 184     char tmp[BUF_SMALL];
 185
 186     for (key = 1; key < 9; key++)
 187     {
 188         char *send;
 189
 190         g_snprintf (tmp, sizeof (tmp), "k%d", key);
 191         send = SLtt_tgetstr (tmp);
 192         if (send != NULL)
 193         {
 194             g_snprintf (tmp, sizeof (tmp), ESC_STR "&f%dk%dd%dL%s%s", key,
 195                         (int) (sizeof (display) - 1), (int) strlen (send), display, send);
 196             SLtt_write_string (tmp);
 197         }
 198     }
 199 }
 200
 201 /* --------------------------------------------------------------------------------------------- */
 202
 203 static void
 204 do_define_key (int code, const char *strcap)
 205 {
 206     char *seq;
 207
 208     seq = SLtt_tgetstr ((SLFUTURE_CONST char *) strcap);
 209     if (seq != NULL)
 210         define_sequence (code, seq, MCKEY_NOACTION);
 211 }
 212
 213 /* --------------------------------------------------------------------------------------------- */
 214
 215 static void
 216 load_terminfo_keys (void)
 217 {
 218     int i;
 219
 220     for (i = 0; key_table[i].key_code; i++)
 221         do_define_key (key_table[i].key_code, key_table[i].key_name);
 222 }
 223
 224 /* --------------------------------------------------------------------------------------------- */
 225 /*** public functions ****************************************************************************/
 226 /* --------------------------------------------------------------------------------------------- */
 227
 228 int
 229 mc_tty_normalize_lines_char (const char *str)
 230 {
 231     char *str2;
 232     int res;
 233
 234     struct mc_tty_lines_struct
 235     {
 236         const char *line;
 237         int line_code;
 238     } const lines_codes[] = {
 239         {"\342\224\214", SLSMG_ULCORN_CHAR},
 240         {"\342\224\220", SLSMG_URCORN_CHAR},
 241         {"\342\224\224", SLSMG_LLCORN_CHAR},
 242         {"\342\224\230", SLSMG_LRCORN_CHAR},
 243         {"\342\224\234", SLSMG_LTEE_CHAR},
 244         {"\342\224\244", SLSMG_RTEE_CHAR},
 245         {"\342\224\254", SLSMG_UTEE_CHAR},
 246         {"\342\224\264", SLSMG_DTEE_CHAR},
 247         {"\342\224\200", SLSMG_HLINE_CHAR},
 248         {"\342\224\202", SLSMG_VLINE_CHAR},
 249         {"\342\224\274", SLSMG_PLUS_CHAR},
 250
 251         {NULL, 0}
 252     };
 253
 254     if (!str)
 255         return (int) ' ';
 256
 257     for (res = 0; lines_codes[res].line; res++)
 258     {
 259         if (strcmp (str, lines_codes[res].line) == 0)
 260             return lines_codes[res].line_code;
 261     }
 262
 263     str2 = mc_tty_normalize_from_utf8 (str);
 264     res = g_utf8_get_char_validated (str2, -1);
 265
 266     if (res < 0)
 267         res = (unsigned char) str2[0];
 268     g_free (str2);
 269
 270     return res;
 271 }
 272
 273 /* --------------------------------------------------------------------------------------------- */
 274
 275 void
 276 tty_init (gboolean mouse_enable, gboolean is_xterm)
 277 {
 278     SLtt_Ignore_Beep = 1;
 279
 280     SLutf8_enable (-1);         /* has to be called first before any of the other functions. */
 281     SLtt_get_terminfo ();
 282     /*
 283      * If the terminal in not in terminfo but begins with a well-known
 284      * string such as "linux" or "xterm" S-Lang will go on, but the
 285      * terminal size and several other variables won't be initialized
 286      * (as of S-Lang 1.4.4). Detect it and abort. Also detect extremely
 287      * small screen dimensions.
 288      */
 289     if ((COLS < 10) || (LINES < 5)
 290 #if SLANG_VERSION < 20303
 291         /* Beginning from pre2.3.3-8 (55f58798c267d76a1b93d0d916027b71a10ac1ee),
 292            these limitations were eliminated. */
 293         || (COLS > SLTT_MAX_SCREEN_COLS) || (LINES > SLTT_MAX_SCREEN_ROWS)
 294 #endif
 295         )
 296     {
 297         fprintf (stderr,
 298                  _("Screen size %dx%d is not supported.\n"
 299                    "Check the TERM environment variable.\n"), COLS, LINES);
 300         exit (EXIT_FAILURE);
 301     }
 302
 303     tcgetattr (fileno (stdin), &boot_mode);
 304     /* 255 = ignore abort char; XCTRL('g') for abort char = ^g */
 305     SLang_init_tty (XCTRL ('g'), 1, 0);
 306
 307     if (mc_global.tty.ugly_line_drawing)
 308         SLtt_Has_Alt_Charset = 0;
 309
 310     tcgetattr (SLang_TT_Read_FD, &new_mode);
 311
 312     tty_reset_prog_mode ();
 313     load_terminfo_keys ();
 314
 315     SLtt_Blink_Mode = (tty_use_256colors (NULL) || tty_use_truecolors (NULL)) ? 1 : 0;
 316
 317     tty_start_interrupt_key ();
 318
 319     /* It's the small part from the previous init_key() */
 320     init_key_input_fd ();
 321
 322     /* For 8-bit locales, NCurses handles 154 (0x9A) symbol properly, while S-Lang
 323      * requires SLsmg_Display_Eight_Bit >= 154 (OR manual filtering if xterm display
 324      * detected - but checking TERM would fail under screen, OR running xterm
 325      * with allowC1Printable).
 326      */
 327     tty_display_8bit (FALSE);
 328
 329     SLsmg_init_smg ();
 330     slsmg_active = TRUE;
 331     if (!mouse_enable)
 332         use_mouse_p = MOUSE_DISABLED;
 333     tty_init_xterm_support (is_xterm);  /* do it before tty_enter_ca_mode() call */
 334     tty_enter_ca_mode ();
 335     tty_keypad (TRUE);
 336     tty_nodelay (FALSE);
 337
 338     tty_setup_sigwinch (sigwinch_handler);
 339 }
 340
 341 /* --------------------------------------------------------------------------------------------- */
 342
 343 void
 344 tty_shutdown (void)
 345 {
 346     char *op_cap;
 347
 348     tty_destroy_winch_pipe ();
 349     tty_reset_shell_mode ();
 350     tty_noraw_mode ();
 351     tty_keypad (FALSE);
 352     tty_reset_screen ();
 353     tty_exit_ca_mode ();
 354     SLang_reset_tty ();
 355     slsmg_active = FALSE;
 356
 357     /* Load the op capability to reset the colors to those that were
 358      * active when the program was started up
 359      */
 360     op_cap = SLtt_tgetstr ((SLFUTURE_CONST char *) "op");
 361     if (op_cap != NULL)
 362     {
 363         fputs (op_cap, stdout);
 364         fflush (stdout);
 365     }
 366 }
 367
 368 /* --------------------------------------------------------------------------------------------- */
 369
 370 void
 371 tty_enter_ca_mode (void)
 372 {
 373     /* S-Lang handles alternate screen switching and cursor position saving */
 374 }
 375
 376 /* --------------------------------------------------------------------------------------------- */
 377
 378 void
 379 tty_exit_ca_mode (void)
 380 {
 381     /* S-Lang handles alternate screen switching and cursor position restoring */
 382 }
 383
 384 /* --------------------------------------------------------------------------------------------- */
 385
 386 void
 387 tty_change_screen_size (void)
 388 {
 389     SLtt_get_screen_size ();
 390     if (slsmg_active)
 391         SLsmg_reinit_smg ();
 392
 393 #ifdef ENABLE_SUBSHELL
 394     if (mc_global.tty.use_subshell)
 395         tty_resize (mc_global.tty.subshell_pty);
 396 #endif
 397 }
 398
 399 /* --------------------------------------------------------------------------------------------- */
 400 /* Done each time we come back from done mode */
 401
 402 void
 403 tty_reset_prog_mode (void)
 404 {
 405     tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
 406     SLsmg_init_smg ();
 407     slsmg_active = TRUE;
 408     SLsmg_touch_lines (0, LINES);
 409 }
 410
 411 /* --------------------------------------------------------------------------------------------- */
 412 /* Called each time we want to shutdown slang screen manager */
 413
 414 void
 415 tty_reset_shell_mode (void)
 416 {
 417     tcsetattr (SLang_TT_Read_FD, TCSANOW, &boot_mode);
 418 }
 419
 420 /* --------------------------------------------------------------------------------------------- */
 421
 422 void
 423 tty_raw_mode (void)
 424 {
 425     tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
 426 }
 427
 428 /* --------------------------------------------------------------------------------------------- */
 429
 430 void
 431 tty_noraw_mode (void)
 432 {
 433 }
 434
 435 /* --------------------------------------------------------------------------------------------- */
 436
 437 void
 438 tty_noecho (void)
 439 {
 440 }
 441
 442 /* --------------------------------------------------------------------------------------------- */
 443
 444 int
 445 tty_flush_input (void)
 446 {
 447     return 0;                   /* OK */
 448 }
 449
 450 /* --------------------------------------------------------------------------------------------- */
 451
 452 void
 453 tty_keypad (gboolean set)
 454 {
 455     char *keypad_string;
 456
 457     keypad_string = SLtt_tgetstr ((SLFUTURE_CONST char *) (set ? "ks" : "ke"));
 458     if (keypad_string != NULL)
 459         SLtt_write_string (keypad_string);
 460     if (set && reset_hp_softkeys)
 461         slang_reset_softkeys ();
 462 }
 463
 464 /* --------------------------------------------------------------------------------------------- */
 465
 466 void
 467 tty_nodelay (gboolean set)
 468 {
 469     no_slang_delay = set;
 470 }
 471
 472 /* --------------------------------------------------------------------------------------------- */
 473
 474 int
 475 tty_baudrate (void)
 476 {
 477     return SLang_TT_Baud_Rate;
 478 }
 479
 480 /* --------------------------------------------------------------------------------------------- */
 481
 482 int
 483 tty_lowlevel_getch (void)
 484 {
 485     int c;
 486
 487     if (no_slang_delay && (SLang_input_pending (0) == 0))
 488         return -1;
 489
 490     c = SLang_getkey ();
 491     if (c == SLANG_GETKEY_ERROR)
 492     {
 493         fprintf (stderr,
 494                  "SLang_getkey returned SLANG_GETKEY_ERROR\n"
 495                  "Assuming EOF on stdin and exiting\n");
 496         exit (EXIT_FAILURE);
 497     }
 498
 499     return c;
 500 }
 501
 502 /* --------------------------------------------------------------------------------------------- */
 503
 504 int
 505 tty_reset_screen (void)
 506 {
 507     SLsmg_reset_smg ();
 508     slsmg_active = FALSE;
 509     return 0;                   /* OK */
 510 }
 511
 512 /* --------------------------------------------------------------------------------------------- */
 513
 514 void
 515 tty_touch_screen (void)
 516 {
 517     SLsmg_touch_lines (0, LINES);
 518 }
 519
 520 /* --------------------------------------------------------------------------------------------- */
 521
 522 void
 523 tty_gotoyx (int y, int x)
 524 {
 525     SLsmg_gotorc (y, x);
 526 }
 527
 528 /* --------------------------------------------------------------------------------------------- */
 529
 530 void
 531 tty_getyx (int *py, int *px)
 532 {
 533     *py = SLsmg_get_row ();
 534     *px = SLsmg_get_column ();
 535 }
 536
 537 /* --------------------------------------------------------------------------------------------- */
 538
 539 void
 540 tty_draw_hline (int y, int x, int ch, int len)
 541 {
 542     int x1;
 543
 544     if (y < 0 || y >= LINES || x >= COLS)
 545         return;
 546
 547     x1 = x;
 548
 549     if (x < 0)
 550     {
 551         len += x;
 552         if (len <= 0)
 553             return;
 554         x = 0;
 555     }
 556
 557     if (ch == ACS_HLINE)
 558         ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
 559     if (ch == 0)
 560         ch = ACS_HLINE;
 561
 562     SLsmg_gotorc (y, x);
 563
 564     if (ch == ACS_HLINE)
 565         SLsmg_draw_hline (len);
 566     else
 567         while (len-- != 0)
 568             tty_print_char (ch);
 569
 570     SLsmg_gotorc (y, x1);
 571 }
 572
 573 /* --------------------------------------------------------------------------------------------- */
 574
 575 void
 576 tty_draw_vline (int y, int x, int ch, int len)
 577 {
 578     int y1;
 579
 580     if (x < 0 || x >= COLS || y >= LINES)
 581         return;
 582
 583     y1 = y;
 584
 585     if (y < 0)
 586     {
 587         len += y;
 588         if (len <= 0)
 589             return;
 590         y = 0;
 591     }
 592
 593     if (ch == ACS_VLINE)
 594         ch = mc_tty_frm[MC_TTY_FRM_VERT];
 595     if (ch == 0)
 596         ch = ACS_VLINE;
 597
 598     SLsmg_gotorc (y, x);
 599
 600     if (ch == ACS_VLINE)
 601         SLsmg_draw_vline (len);
 602     else
 603     {
 604         int pos = 0;
 605
 606         while (len-- != 0)
 607         {
 608             SLsmg_gotorc (y + pos, x);
 609             tty_print_char (ch);
 610             pos++;
 611         }
 612     }
 613
 614     SLsmg_gotorc (y1, x);
 615 }
 616
 617 /* --------------------------------------------------------------------------------------------- */
 618
 619 void
 620 tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
 621 {
 622     SLsmg_fill_region (y, x, rows, cols, ch);
 623 }
 624
 625 /* --------------------------------------------------------------------------------------------- */
 626
 627 void
 628 tty_colorize_area (int y, int x, int rows, int cols, int color)
 629 {
 630     if (use_colors)
 631         SLsmg_set_color_in_region (color, y, x, rows, cols);
 632 }
 633
 634 /* --------------------------------------------------------------------------------------------- */
 635
 636 void
 637 tty_set_alt_charset (gboolean alt_charset)
 638 {
 639     SLsmg_set_char_set ((int) alt_charset);
 640 }
 641
 642 /* --------------------------------------------------------------------------------------------- */
 643
 644 void
 645 tty_display_8bit (gboolean what)
 646 {
 647     SLsmg_Display_Eight_Bit = what ? 128 : 160;
 648 }
 649
 650 /* --------------------------------------------------------------------------------------------- */
 651
 652 void
 653 tty_print_char (int c)
 654 {
 655     SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
 656 }
 657
 658 /* --------------------------------------------------------------------------------------------- */
 659
 660 void
 661 tty_print_alt_char (int c, gboolean single)
 662 {
 663 #define DRAW(x, y) (x == y) \
 664        ? SLsmg_draw_object (SLsmg_get_row(), SLsmg_get_column(), x) \
 665        : SLsmg_write_char ((unsigned int) y)
 666     switch (c)
 667     {
 668     case ACS_VLINE:
 669         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT]);
 670         break;
 671     case ACS_HLINE:
 672         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ]);
 673         break;
 674     case ACS_LTEE:
 675         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTMIDDLE : MC_TTY_FRM_DLEFTMIDDLE]);
 676         break;
 677     case ACS_RTEE:
 678         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTMIDDLE : MC_TTY_FRM_DRIGHTMIDDLE]);
 679         break;
 680     case ACS_TTEE:
 681         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_TOPMIDDLE : MC_TTY_FRM_DTOPMIDDLE]);
 682         break;
 683     case ACS_BTEE:
 684         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_BOTTOMMIDDLE : MC_TTY_FRM_DBOTTOMMIDDLE]);
 685         break;
 686     case ACS_ULCORNER:
 687         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTTOP : MC_TTY_FRM_DLEFTTOP]);
 688         break;
 689     case ACS_LLCORNER:
 690         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTBOTTOM : MC_TTY_FRM_DLEFTBOTTOM]);
 691         break;
 692     case ACS_URCORNER:
 693         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTTOP : MC_TTY_FRM_DRIGHTTOP]);
 694         break;
 695     case ACS_LRCORNER:
 696         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTBOTTOM : MC_TTY_FRM_DRIGHTBOTTOM]);
 697         break;
 698     case ACS_PLUS:
 699         DRAW (c, mc_tty_frm[MC_TTY_FRM_CROSS]);
 700         break;
 701     default:
 702         SLsmg_write_char ((unsigned int) c);
 703     }
 704 #undef DRAW
 705 }
 706
 707 /* --------------------------------------------------------------------------------------------- */
 708
 709 void
 710 tty_print_anychar (int c)
 711 {
 712     if (c > 255)
 713     {
 714         char str[UTF8_CHAR_LEN + 1];
 715         int res;
 716
 717         res = g_unichar_to_utf8 (c, str);
 718         if (res == 0)
 719         {
 720             str[0] = '.';
 721             str[1] = '\0';
 722         }
 723         else
 724         {
 725             str[res] = '\0';
 726         }
 727         SLsmg_write_string ((char *) str_term_form (str));
 728     }
 729     else
 730     {
 731         if (!is_printable (c))
 732             c = '.';
 733         SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
 734     }
 735 }
 736
 737 /* --------------------------------------------------------------------------------------------- */
 738
 739 void
 740 tty_print_string (const char *s)
 741 {
 742     SLsmg_write_string ((char *) str_term_form (s));
 743 }
 744
 745 /* --------------------------------------------------------------------------------------------- */
 746
 747 void
 748 tty_printf (const char *fmt, ...)
 749 {
 750     va_list args;
 751
 752     va_start (args, fmt);
 753     SLsmg_vprintf ((char *) fmt, args);
 754     va_end (args);
 755 }
 756
 757 /* --------------------------------------------------------------------------------------------- */
 758
 759 char *
 760 tty_tgetstr (const char *cap)
 761 {
 762     return SLtt_tgetstr ((SLFUTURE_CONST char *) cap);
 763 }
 764
 765 /* --------------------------------------------------------------------------------------------- */
 766
 767 void
 768 tty_refresh (void)
 769 {
 770     SLsmg_refresh ();
 771 }
 772
 773 /* --------------------------------------------------------------------------------------------- */
 774
 775 void
 776 tty_beep (void)
 777 {
 778     SLtt_beep ();
 779 }
 780
 781 /* --------------------------------------------------------------------------------------------- */