lib/tty/tty-slang.c

   1 /*
   2    Interface to the terminal controlling library.
   3    Slang wrapper.
   4
   5    Copyright (C) 2005-2016
   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 /*** file scope variables ************************************************************************/
  78
  79 /* Various saved termios settings that we control here */
  80 static struct termios boot_mode;
  81 static struct termios new_mode;
  82
  83 /* Controls whether we should wait for input in tty_lowlevel_getch */
  84 static gboolean no_slang_delay;
  85
  86 static gboolean slsmg_active = FALSE;
  87
  88 /* This table describes which capabilities we want and which values we
  89  * assign to them.
  90  */
  91 static const struct
  92 {
  93     int key_code;
  94     const char *key_name;
  95 } key_table[] =
  96 {
  97     /* *INDENT-OFF* */
  98     { KEY_F (0), "k0" },
  99     { KEY_F (1), "k1" },
 100     { KEY_F (2), "k2" },
 101     { KEY_F (3), "k3" },
 102     { KEY_F (4), "k4" },
 103     { KEY_F (5), "k5" },
 104     { KEY_F (6), "k6" },
 105     { KEY_F (7), "k7" },
 106     { KEY_F (8), "k8" },
 107     { KEY_F (9), "k9" },
 108     { KEY_F (10), "k;" },
 109     { KEY_F (11), "F1" },
 110     { KEY_F (12), "F2" },
 111     { KEY_F (13), "F3" },
 112     { KEY_F (14), "F4" },
 113     { KEY_F (15), "F5" },
 114     { KEY_F (16), "F6" },
 115     { KEY_F (17), "F7" },
 116     { KEY_F (18), "F8" },
 117     { KEY_F (19), "F9" },
 118     { KEY_F (20), "FA" },
 119     { KEY_IC, "kI" },
 120     { KEY_NPAGE, "kN" },
 121     { KEY_PPAGE, "kP" },
 122     { KEY_LEFT, "kl" },
 123     { KEY_RIGHT, "kr" },
 124     { KEY_UP, "ku" },
 125     { KEY_DOWN, "kd" },
 126     { KEY_DC, "kD" },
 127     { KEY_BACKSPACE, "kb" },
 128     { KEY_HOME, "kh" },
 129     { KEY_END, "@7" },
 130     { 0, NULL }
 131     /* *INDENT-ON* */
 132 };
 133
 134 /* --------------------------------------------------------------------------------------------- */
 135 /*** file scope functions ************************************************************************/
 136 /* --------------------------------------------------------------------------------------------- */
 137
 138 static void
 139 tty_setup_sigwinch (void (*handler) (int))
 140 {
 141     (void) SLsignal (SIGWINCH, handler);
 142 }
 143
 144 /* --------------------------------------------------------------------------------------------- */
 145
 146 static void
 147 sigwinch_handler (int dummy)
 148 {
 149     (void) dummy;
 150
 151     mc_global.tty.winch_flag = 1;
 152     (void) SLsignal (SIGWINCH, sigwinch_handler);
 153 }
 154
 155 /* --------------------------------------------------------------------------------------------- */
 156
 157 /* HP Terminals have capabilities (pfkey, pfloc, pfx) to program function keys.
 158    elm 2.4pl15 invoked with the -K option utilizes these softkeys and the
 159    consequence is that function keys don't work in MC sometimes...
 160    Unfortunately I don't now the one and only escape sequence to turn off.
 161    softkeys (elm uses three different capabilities to turn on softkeys and two.
 162    capabilities to turn them off)..
 163    Among other things elm uses the pair we already use in slang_keypad. That's.
 164    the reason why I call slang_reset_softkeys from slang_keypad. In lack of
 165    something better the softkeys are programmed to their defaults from the
 166    termcap/terminfo database.
 167    The escape sequence to program the softkeys is taken from elm and it is.
 168    hardcoded because neither slang nor ncurses 4.1 know how to 'printf' this.
 169    sequence. -- Norbert
 170  */
 171
 172 static void
 173 slang_reset_softkeys (void)
 174 {
 175     int key;
 176     static const char display[] = "                ";
 177     char tmp[BUF_SMALL];
 178
 179     for (key = 1; key < 9; key++)
 180     {
 181         char *send;
 182
 183         g_snprintf (tmp, sizeof (tmp), "k%d", key);
 184         send = SLtt_tgetstr (tmp);
 185         if (send != NULL)
 186         {
 187             g_snprintf (tmp, sizeof (tmp), ESC_STR "&f%dk%dd%dL%s%s", key,
 188                         (int) (sizeof (display) - 1), (int) strlen (send), display, send);
 189             SLtt_write_string (tmp);
 190         }
 191     }
 192 }
 193
 194 /* --------------------------------------------------------------------------------------------- */
 195
 196 static void
 197 do_define_key (int code, const char *strcap)
 198 {
 199     char *seq;
 200
 201     seq = SLtt_tgetstr ((SLFUTURE_CONST char *) strcap);
 202     if (seq != NULL)
 203         define_sequence (code, seq, MCKEY_NOACTION);
 204 }
 205
 206 /* --------------------------------------------------------------------------------------------- */
 207
 208 static void
 209 load_terminfo_keys (void)
 210 {
 211     int i;
 212
 213     for (i = 0; key_table[i].key_code; i++)
 214         do_define_key (key_table[i].key_code, key_table[i].key_name);
 215 }
 216
 217 /* --------------------------------------------------------------------------------------------- */
 218 /*** public functions ****************************************************************************/
 219 /* --------------------------------------------------------------------------------------------- */
 220
 221 int
 222 mc_tty_normalize_lines_char (const char *str)
 223 {
 224     char *str2;
 225     int res;
 226
 227     struct mc_tty_lines_struct
 228     {
 229         const char *line;
 230         int line_code;
 231     } const lines_codes[] = {
 232         {"\342\224\214", SLSMG_ULCORN_CHAR},
 233         {"\342\224\220", SLSMG_URCORN_CHAR},
 234         {"\342\224\224", SLSMG_LLCORN_CHAR},
 235         {"\342\224\230", SLSMG_LRCORN_CHAR},
 236         {"\342\224\234", SLSMG_LTEE_CHAR},
 237         {"\342\224\244", SLSMG_RTEE_CHAR},
 238         {"\342\224\254", SLSMG_UTEE_CHAR},
 239         {"\342\224\264", SLSMG_DTEE_CHAR},
 240         {"\342\224\200", SLSMG_HLINE_CHAR},
 241         {"\342\224\202", SLSMG_VLINE_CHAR},
 242         {"\342\224\274", SLSMG_PLUS_CHAR},
 243
 244         {NULL, 0}
 245     };
 246
 247     if (!str)
 248         return (int) ' ';
 249
 250     for (res = 0; lines_codes[res].line; res++)
 251     {
 252         if (strcmp (str, lines_codes[res].line) == 0)
 253             return lines_codes[res].line_code;
 254     }
 255
 256     str2 = mc_tty_normalize_from_utf8 (str);
 257     res = g_utf8_get_char_validated (str2, -1);
 258
 259     if (res < 0)
 260         res = (unsigned char) str2[0];
 261     g_free (str2);
 262
 263     return res;
 264 }
 265
 266 /* --------------------------------------------------------------------------------------------- */
 267
 268 void
 269 tty_init (gboolean mouse_enable, gboolean is_xterm)
 270 {
 271     SLtt_Ignore_Beep = 1;
 272
 273     SLutf8_enable (-1);         /* has to be called first before any of the other functions. */
 274     SLtt_get_terminfo ();
 275     /*
 276      * If the terminal in not in terminfo but begins with a well-known
 277      * string such as "linux" or "xterm" S-Lang will go on, but the
 278      * terminal size and several other variables won't be initialized
 279      * (as of S-Lang 1.4.4). Detect it and abort. Also detect extremely
 280      * small, large and negative screen dimensions.
 281      */
 282     if ((COLS < 10) || (LINES < 5)
 283         || (COLS > SLTT_MAX_SCREEN_COLS) || (LINES > SLTT_MAX_SCREEN_ROWS))
 284     {
 285         fprintf (stderr,
 286                  _("Screen size %dx%d is not supported.\n"
 287                    "Check the TERM environment variable.\n"), COLS, LINES);
 288         exit (EXIT_FAILURE);
 289     }
 290
 291     tcgetattr (fileno (stdin), &boot_mode);
 292     /* 255 = ignore abort char; XCTRL('g') for abort char = ^g */
 293     SLang_init_tty (XCTRL ('g'), 1, 0);
 294
 295     if (mc_global.tty.ugly_line_drawing)
 296         SLtt_Has_Alt_Charset = 0;
 297
 298     /* If SLang uses fileno(stderr) for terminal input MC will hang
 299        if we call SLang_getkey between calls to open_error_pipe and
 300        close_error_pipe, e.g. when we do a growing view of an gzipped
 301        file. */
 302     if (SLang_TT_Read_FD == fileno (stderr))
 303         SLang_TT_Read_FD = fileno (stdin);
 304
 305     if (tcgetattr (SLang_TT_Read_FD, &new_mode) == 0)
 306     {
 307 #ifdef VDSUSP
 308         new_mode.c_cc[VDSUSP] = NULL_VALUE;     /* to ignore ^Y */
 309 #endif
 310 #ifdef VLNEXT
 311         new_mode.c_cc[VLNEXT] = NULL_VALUE;     /* to ignore ^V */
 312 #endif
 313         tcsetattr (SLang_TT_Read_FD, TCSADRAIN, &new_mode);
 314     }
 315
 316     tty_reset_prog_mode ();
 317     load_terminfo_keys ();
 318
 319     SLtt_Blink_Mode = tty_use_256colors ()? 1 : 0;
 320
 321     tty_start_interrupt_key ();
 322
 323     /* It's the small part from the previous init_key() */
 324     init_key_input_fd ();
 325
 326     /* For 8-bit locales, NCurses handles 154 (0x9A) symbol properly, while S-Lang
 327      * requires SLsmg_Display_Eight_Bit >= 154 (OR manual filtering if xterm display
 328      * detected - but checking TERM would fail under screen, OR running xterm
 329      * with allowC1Printable).
 330      */
 331     tty_display_8bit (FALSE);
 332
 333     SLsmg_init_smg ();
 334     slsmg_active = TRUE;
 335     if (!mouse_enable)
 336         use_mouse_p = MOUSE_DISABLED;
 337     tty_init_xterm_support (is_xterm);  /* do it before tty_enter_ca_mode() call */
 338     tty_enter_ca_mode ();
 339     tty_keypad (TRUE);
 340     tty_nodelay (FALSE);
 341
 342     tty_setup_sigwinch (sigwinch_handler);
 343 }
 344
 345 /* --------------------------------------------------------------------------------------------- */
 346
 347 void
 348 tty_shutdown (void)
 349 {
 350     char *op_cap;
 351
 352     tty_reset_shell_mode ();
 353     tty_noraw_mode ();
 354     tty_keypad (FALSE);
 355     tty_reset_screen ();
 356     tty_exit_ca_mode ();
 357     SLang_reset_tty ();
 358     slsmg_active = FALSE;
 359
 360     /* Load the op capability to reset the colors to those that were
 361      * active when the program was started up
 362      */
 363     op_cap = SLtt_tgetstr ((SLFUTURE_CONST char *) "op");
 364     if (op_cap != NULL)
 365     {
 366         fputs (op_cap, stdout);
 367         fflush (stdout);
 368     }
 369 }
 370
 371 /* --------------------------------------------------------------------------------------------- */
 372
 373 void
 374 tty_enter_ca_mode (void)
 375 {
 376     /* S-Lang handles alternate screen switching and cursor position saving */
 377 }
 378
 379 /* --------------------------------------------------------------------------------------------- */
 380
 381 void
 382 tty_exit_ca_mode (void)
 383 {
 384     /* S-Lang handles alternate screen switching and cursor position restoring */
 385 }
 386
 387 /* --------------------------------------------------------------------------------------------- */
 388
 389 void
 390 tty_change_screen_size (void)
 391 {
 392     SLtt_get_screen_size ();
 393     if (slsmg_active)
 394         SLsmg_reinit_smg ();
 395
 396 #ifdef ENABLE_SUBSHELL
 397     if (mc_global.tty.use_subshell)
 398         tty_resize (mc_global.tty.subshell_pty);
 399 #endif
 400 }
 401
 402 /* --------------------------------------------------------------------------------------------- */
 403 /* Done each time we come back from done mode */
 404
 405 void
 406 tty_reset_prog_mode (void)
 407 {
 408     tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
 409     SLsmg_init_smg ();
 410     slsmg_active = TRUE;
 411     SLsmg_touch_lines (0, LINES);
 412 }
 413
 414 /* --------------------------------------------------------------------------------------------- */
 415 /* Called each time we want to shutdown slang screen manager */
 416
 417 void
 418 tty_reset_shell_mode (void)
 419 {
 420     tcsetattr (SLang_TT_Read_FD, TCSANOW, &boot_mode);
 421 }
 422
 423 /* --------------------------------------------------------------------------------------------- */
 424
 425 void
 426 tty_raw_mode (void)
 427 {
 428     tcsetattr (SLang_TT_Read_FD, TCSANOW, &new_mode);
 429 }
 430
 431 /* --------------------------------------------------------------------------------------------- */
 432
 433 void
 434 tty_noraw_mode (void)
 435 {
 436 }
 437
 438 /* --------------------------------------------------------------------------------------------- */
 439
 440 void
 441 tty_noecho (void)
 442 {
 443 }
 444
 445 /* --------------------------------------------------------------------------------------------- */
 446
 447 int
 448 tty_flush_input (void)
 449 {
 450     return 0;                   /* OK */
 451 }
 452
 453 /* --------------------------------------------------------------------------------------------- */
 454
 455 void
 456 tty_keypad (gboolean set)
 457 {
 458     char *keypad_string;
 459
 460     keypad_string = SLtt_tgetstr ((SLFUTURE_CONST char *) (set ? "ks" : "ke"));
 461     if (keypad_string != NULL)
 462         SLtt_write_string (keypad_string);
 463     if (set && reset_hp_softkeys)
 464         slang_reset_softkeys ();
 465 }
 466
 467 /* --------------------------------------------------------------------------------------------- */
 468
 469 void
 470 tty_nodelay (gboolean set)
 471 {
 472     no_slang_delay = set;
 473 }
 474
 475 /* --------------------------------------------------------------------------------------------- */
 476
 477 int
 478 tty_baudrate (void)
 479 {
 480     return SLang_TT_Baud_Rate;
 481 }
 482
 483 /* --------------------------------------------------------------------------------------------- */
 484
 485 int
 486 tty_lowlevel_getch (void)
 487 {
 488     int c;
 489
 490     if (no_slang_delay && (SLang_input_pending (0) == 0))
 491         return -1;
 492
 493     c = SLang_getkey ();
 494     if (c == SLANG_GETKEY_ERROR)
 495     {
 496         fprintf (stderr,
 497                  "SLang_getkey returned SLANG_GETKEY_ERROR\n"
 498                  "Assuming EOF on stdin and exiting\n");
 499         exit (EXIT_FAILURE);
 500     }
 501
 502     return c;
 503 }
 504
 505 /* --------------------------------------------------------------------------------------------- */
 506
 507 int
 508 tty_reset_screen (void)
 509 {
 510     SLsmg_reset_smg ();
 511     slsmg_active = FALSE;
 512     return 0;                   /* OK */
 513 }
 514
 515 /* --------------------------------------------------------------------------------------------- */
 516
 517 void
 518 tty_touch_screen (void)
 519 {
 520     SLsmg_touch_lines (0, LINES);
 521 }
 522
 523 /* --------------------------------------------------------------------------------------------- */
 524
 525 void
 526 tty_gotoyx (int y, int x)
 527 {
 528     SLsmg_gotorc (y, x);
 529 }
 530
 531 /* --------------------------------------------------------------------------------------------- */
 532
 533 void
 534 tty_getyx (int *py, int *px)
 535 {
 536     *py = SLsmg_get_row ();
 537     *px = SLsmg_get_column ();
 538 }
 539
 540 /* --------------------------------------------------------------------------------------------- */
 541
 542 void
 543 tty_draw_hline (int y, int x, int ch, int len)
 544 {
 545     int x1;
 546
 547     if (y < 0 || y >= LINES || x >= COLS)
 548         return;
 549
 550     x1 = x;
 551
 552     if (x < 0)
 553     {
 554         len += x;
 555         if (len <= 0)
 556             return;
 557         x = 0;
 558     }
 559
 560     if (ch == ACS_HLINE)
 561         ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
 562     if (ch == 0)
 563         ch = ACS_HLINE;
 564
 565     SLsmg_gotorc (y, x);
 566
 567     if (ch == ACS_HLINE)
 568         SLsmg_draw_hline (len);
 569     else
 570         while (len-- != 0)
 571             tty_print_char (ch);
 572
 573     SLsmg_gotorc (y, x1);
 574 }
 575
 576 /* --------------------------------------------------------------------------------------------- */
 577
 578 void
 579 tty_draw_vline (int y, int x, int ch, int len)
 580 {
 581     int y1;
 582
 583     if (x < 0 || x >= COLS || y >= LINES)
 584         return;
 585
 586     y1 = y;
 587
 588     if (y < 0)
 589     {
 590         len += y;
 591         if (len <= 0)
 592             return;
 593         y = 0;
 594     }
 595
 596     if (ch == ACS_VLINE)
 597         ch = mc_tty_frm[MC_TTY_FRM_VERT];
 598     if (ch == 0)
 599         ch = ACS_VLINE;
 600
 601     SLsmg_gotorc (y, x);
 602
 603     if (ch == ACS_VLINE)
 604         SLsmg_draw_vline (len);
 605     else
 606     {
 607         int pos = 0;
 608
 609         while (len-- != 0)
 610         {
 611             SLsmg_gotorc (y + pos, x);
 612             tty_print_char (ch);
 613             pos++;
 614         }
 615     }
 616
 617     SLsmg_gotorc (y1, x);
 618 }
 619
 620 /* --------------------------------------------------------------------------------------------- */
 621
 622 void
 623 tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
 624 {
 625     SLsmg_fill_region (y, x, rows, cols, ch);
 626 }
 627
 628 /* --------------------------------------------------------------------------------------------- */
 629
 630 void
 631 tty_set_alt_charset (gboolean alt_charset)
 632 {
 633     SLsmg_set_char_set ((int) alt_charset);
 634 }
 635
 636 /* --------------------------------------------------------------------------------------------- */
 637
 638 void
 639 tty_display_8bit (gboolean what)
 640 {
 641     SLsmg_Display_Eight_Bit = what ? 128 : 160;
 642 }
 643
 644 /* --------------------------------------------------------------------------------------------- */
 645
 646 void
 647 tty_print_char (int c)
 648 {
 649     SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
 650 }
 651
 652 /* --------------------------------------------------------------------------------------------- */
 653
 654 void
 655 tty_print_alt_char (int c, gboolean single)
 656 {
 657 #define DRAW(x, y) (x == y) \
 658        ? SLsmg_draw_object (SLsmg_get_row(), SLsmg_get_column(), x) \
 659        : SLsmg_write_char ((unsigned int) y)
 660     switch (c)
 661     {
 662     case ACS_VLINE:
 663         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT]);
 664         break;
 665     case ACS_HLINE:
 666         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ]);
 667         break;
 668     case ACS_LTEE:
 669         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTMIDDLE : MC_TTY_FRM_DLEFTMIDDLE]);
 670         break;
 671     case ACS_RTEE:
 672         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTMIDDLE : MC_TTY_FRM_DRIGHTMIDDLE]);
 673         break;
 674     case ACS_TTEE:
 675         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_TOPMIDDLE : MC_TTY_FRM_DTOPMIDDLE]);
 676         break;
 677     case ACS_BTEE:
 678         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_BOTTOMMIDDLE : MC_TTY_FRM_DBOTTOMMIDDLE]);
 679         break;
 680     case ACS_ULCORNER:
 681         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTTOP : MC_TTY_FRM_DLEFTTOP]);
 682         break;
 683     case ACS_LLCORNER:
 684         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_LEFTBOTTOM : MC_TTY_FRM_DLEFTBOTTOM]);
 685         break;
 686     case ACS_URCORNER:
 687         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTTOP : MC_TTY_FRM_DRIGHTTOP]);
 688         break;
 689     case ACS_LRCORNER:
 690         DRAW (c, mc_tty_frm[single ? MC_TTY_FRM_RIGHTBOTTOM : MC_TTY_FRM_DRIGHTBOTTOM]);
 691         break;
 692     case ACS_PLUS:
 693         DRAW (c, mc_tty_frm[MC_TTY_FRM_CROSS]);
 694         break;
 695     default:
 696         SLsmg_write_char ((unsigned int) c);
 697     }
 698 #undef DRAW
 699 }
 700
 701 /* --------------------------------------------------------------------------------------------- */
 702
 703 void
 704 tty_print_anychar (int c)
 705 {
 706     if (c > 255)
 707     {
 708         char str[UTF8_CHAR_LEN + 1];
 709         int res;
 710
 711         res = g_unichar_to_utf8 (c, str);
 712         if (res == 0)
 713         {
 714             str[0] = '.';
 715             str[1] = '\0';
 716         }
 717         else
 718         {
 719             str[res] = '\0';
 720         }
 721         SLsmg_write_string ((char *) str_term_form (str));
 722     }
 723     else
 724     {
 725         if (!is_printable (c))
 726             c = '.';
 727         SLsmg_write_char ((SLwchar_Type) ((unsigned int) c));
 728     }
 729 }
 730
 731 /* --------------------------------------------------------------------------------------------- */
 732
 733 void
 734 tty_print_string (const char *s)
 735 {
 736     SLsmg_write_string ((char *) str_term_form (s));
 737 }
 738
 739 /* --------------------------------------------------------------------------------------------- */
 740
 741 void
 742 tty_printf (const char *fmt, ...)
 743 {
 744     va_list args;
 745
 746     va_start (args, fmt);
 747     SLsmg_vprintf ((char *) fmt, args);
 748     va_end (args);
 749 }
 750
 751 /* --------------------------------------------------------------------------------------------- */
 752
 753 char *
 754 tty_tgetstr (const char *cap)
 755 {
 756     return SLtt_tgetstr ((SLFUTURE_CONST char *) cap);
 757 }
 758
 759 /* --------------------------------------------------------------------------------------------- */
 760
 761 void
 762 tty_refresh (void)
 763 {
 764     SLsmg_refresh ();
 765 }
 766
 767 /* --------------------------------------------------------------------------------------------- */
 768
 769 void
 770 tty_beep (void)
 771 {
 772     SLtt_beep ();
 773 }
 774
 775 /* --------------------------------------------------------------------------------------------- */