1 /* 2 * Copyright (C) 1984-2012 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11 /* 12 * Routines which deal with the characteristics of the terminal. 13 * Uses termcap to be as terminal-independent as possible. 14 */ 15 16 #include "less.h" 17 #include "cmd.h" 18 19 #if MSDOS_COMPILER 20 #include "pckeys.h" 21 #if MSDOS_COMPILER==MSOFTC 22 #include <graph.h> 23 #else 24 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 25 #include <conio.h> 26 #if MSDOS_COMPILER==DJGPPC 27 #include <pc.h> 28 extern int fd0; 29 #endif 30 #else 31 #if MSDOS_COMPILER==WIN32C 32 #include <windows.h> 33 #endif 34 #endif 35 #endif 36 #include <time.h> 37 38 #else 39 40 #if HAVE_SYS_IOCTL_H 41 #include <sys/ioctl.h> 42 #endif 43 44 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 45 #include <termios.h> 46 #else 47 #if HAVE_TERMIO_H 48 #include <termio.h> 49 #else 50 #if HAVE_SGSTAT_H 51 #include <sgstat.h> 52 #else 53 #include <sgtty.h> 54 #endif 55 #endif 56 #endif 57 58 #if HAVE_TERMCAP_H 59 #include <termcap.h> 60 #endif 61 #ifdef _OSK 62 #include <signal.h> 63 #endif 64 #if OS2 65 #include <sys/signal.h> 66 #include "pckeys.h" 67 #endif 68 #if HAVE_SYS_STREAM_H 69 #include <sys/stream.h> 70 #endif 71 #if HAVE_SYS_PTEM_H 72 #include <sys/ptem.h> 73 #endif 74 75 #endif /* MSDOS_COMPILER */ 76 77 /* 78 * Check for broken termios package that forces you to manually 79 * set the line discipline. 80 */ 81 #ifdef __ultrix__ 82 #define MUST_SET_LINE_DISCIPLINE 1 83 #else 84 #define MUST_SET_LINE_DISCIPLINE 0 85 #endif 86 87 #if OS2 88 #define DEFAULT_TERM "ansi" 89 static char *windowid; 90 #else 91 #define DEFAULT_TERM "unknown" 92 #endif 93 94 #if MSDOS_COMPILER==MSOFTC 95 static int videopages; 96 static long msec_loops; 97 static int flash_created = 0; 98 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 99 #endif 100 101 #if MSDOS_COMPILER==BORLANDC 102 static unsigned short *whitescreen; 103 static int flash_created = 0; 104 #endif 105 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 106 #define _settextposition(y,x) gotoxy(x,y) 107 #define _clearscreen(m) clrscr() 108 #define _outtext(s) cputs(s) 109 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 110 extern int sc_height; 111 #endif 112 113 #if MSDOS_COMPILER==WIN32C 114 struct keyRecord 115 { 116 int ascii; 117 int scan; 118 } currentKey; 119 120 static int keyCount = 0; 121 static WORD curr_attr; 122 static int pending_scancode = 0; 123 static WORD *whitescreen; 124 125 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 126 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 127 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 128 129 extern int quitting; 130 static void win32_init_term(); 131 static void win32_deinit_term(); 132 133 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 134 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 135 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 136 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 137 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 138 error("SETCOLORS failed"); } 139 #endif 140 141 #if MSDOS_COMPILER 142 public int nm_fg_color; /* Color of normal text */ 143 public int nm_bg_color; 144 public int bo_fg_color; /* Color of bold text */ 145 public int bo_bg_color; 146 public int ul_fg_color; /* Color of underlined text */ 147 public int ul_bg_color; 148 public int so_fg_color; /* Color of standout text */ 149 public int so_bg_color; 150 public int bl_fg_color; /* Color of blinking text */ 151 public int bl_bg_color; 152 static int sy_fg_color; /* Color of system text (before less) */ 153 static int sy_bg_color; 154 155 #else 156 157 /* 158 * Strings passed to tputs() to do various terminal functions. 159 */ 160 static char 161 *sc_pad, /* Pad string */ 162 *sc_home, /* Cursor home */ 163 *sc_addline, /* Add line, scroll down following lines */ 164 *sc_lower_left, /* Cursor to last line, first column */ 165 *sc_return, /* Cursor to beginning of current line */ 166 *sc_move, /* General cursor positioning */ 167 *sc_clear, /* Clear screen */ 168 *sc_eol_clear, /* Clear to end of line */ 169 *sc_eos_clear, /* Clear to end of screen */ 170 *sc_s_in, /* Enter standout (highlighted) mode */ 171 *sc_s_out, /* Exit standout mode */ 172 *sc_u_in, /* Enter underline mode */ 173 *sc_u_out, /* Exit underline mode */ 174 *sc_b_in, /* Enter bold mode */ 175 *sc_b_out, /* Exit bold mode */ 176 *sc_bl_in, /* Enter blink mode */ 177 *sc_bl_out, /* Exit blink mode */ 178 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 179 *sc_backspace, /* Backspace cursor */ 180 *sc_s_keypad, /* Start keypad mode */ 181 *sc_e_keypad, /* End keypad mode */ 182 *sc_init, /* Startup terminal initialization */ 183 *sc_deinit; /* Exit terminal de-initialization */ 184 #endif 185 186 static int init_done = 0; 187 188 public int auto_wrap; /* Terminal does \r\n when write past margin */ 189 public int ignaw; /* Terminal ignores \n immediately after wrap */ 190 public int erase_char; /* The user's erase char */ 191 public int erase2_char; /* The user's other erase char */ 192 public int kill_char; /* The user's line-kill char */ 193 public int werase_char; /* The user's word-erase char */ 194 public int sc_width, sc_height; /* Height & width of screen */ 195 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 196 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 197 public int so_s_width, so_e_width; /* Printing width of standout seq */ 198 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 199 public int above_mem, below_mem; /* Memory retained above/below screen */ 200 public int can_goto_line; /* Can move cursor to any line */ 201 public int clear_bg; /* Clear fills with background color */ 202 public int missing_cap = 0; /* Some capability is missing */ 203 204 static int attrmode = AT_NORMAL; 205 extern int binattr; 206 207 #if !MSDOS_COMPILER 208 static char *cheaper(); 209 static void tmodes(); 210 #endif 211 212 /* 213 * These two variables are sometimes defined in, 214 * and needed by, the termcap library. 215 */ 216 #if MUST_DEFINE_OSPEED 217 extern short ospeed; /* Terminal output baud rate */ 218 extern char PC; /* Pad character */ 219 #endif 220 #ifdef _OSK 221 short ospeed; 222 char PC_, *UP, *BC; 223 #endif 224 225 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 226 extern int no_back_scroll; 227 extern int swindow; 228 extern int no_init; 229 extern int no_keypad; 230 extern volatile sig_atomic_t sigs; 231 extern int wscroll; 232 extern int screen_trashed; 233 extern int tty; 234 extern int top_scroll; 235 extern int oldbot; 236 #if HILITE_SEARCH 237 extern int hilite_search; 238 #endif 239 240 extern char *tgetstr(); 241 extern char *tgoto(); 242 243 244 /* 245 * Change terminal to "raw mode", or restore to "normal" mode. 246 * "Raw mode" means 247 * 1. An outstanding read will complete on receipt of a single keystroke. 248 * 2. Input is not echoed. 249 * 3. On output, \n is mapped to \r\n. 250 * 4. \t is NOT expanded into spaces. 251 * 5. Signal-causing characters such as ctrl-C (interrupt), 252 * etc. are NOT disabled. 253 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 254 */ 255 public void 256 raw_mode(on) 257 int on; 258 { 259 static int curr_on = 0; 260 261 if (on == curr_on) 262 return; 263 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 264 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 265 { 266 struct termios s; 267 static struct termios save_term; 268 static int saved_term = 0; 269 270 if (on) 271 { 272 /* 273 * Get terminal modes. 274 */ 275 tcgetattr(tty, &s); 276 277 /* 278 * Save modes and set certain variables dependent on modes. 279 */ 280 if (!saved_term) 281 { 282 save_term = s; 283 saved_term = 1; 284 } 285 #if HAVE_OSPEED 286 switch (cfgetospeed(&s)) 287 { 288 #ifdef B0 289 case B0: ospeed = 0; break; 290 #endif 291 #ifdef B50 292 case B50: ospeed = 1; break; 293 #endif 294 #ifdef B75 295 case B75: ospeed = 2; break; 296 #endif 297 #ifdef B110 298 case B110: ospeed = 3; break; 299 #endif 300 #ifdef B134 301 case B134: ospeed = 4; break; 302 #endif 303 #ifdef B150 304 case B150: ospeed = 5; break; 305 #endif 306 #ifdef B200 307 case B200: ospeed = 6; break; 308 #endif 309 #ifdef B300 310 case B300: ospeed = 7; break; 311 #endif 312 #ifdef B600 313 case B600: ospeed = 8; break; 314 #endif 315 #ifdef B1200 316 case B1200: ospeed = 9; break; 317 #endif 318 #ifdef B1800 319 case B1800: ospeed = 10; break; 320 #endif 321 #ifdef B2400 322 case B2400: ospeed = 11; break; 323 #endif 324 #ifdef B4800 325 case B4800: ospeed = 12; break; 326 #endif 327 #ifdef B9600 328 case B9600: ospeed = 13; break; 329 #endif 330 #ifdef EXTA 331 case EXTA: ospeed = 14; break; 332 #endif 333 #ifdef EXTB 334 case EXTB: ospeed = 15; break; 335 #endif 336 #ifdef B57600 337 case B57600: ospeed = 16; break; 338 #endif 339 #ifdef B115200 340 case B115200: ospeed = 17; break; 341 #endif 342 default: ; 343 } 344 #endif 345 erase_char = s.c_cc[VERASE]; 346 #ifdef VERASE2 347 erase2_char = s.c_cc[VERASE2]; 348 #endif 349 kill_char = s.c_cc[VKILL]; 350 #ifdef VWERASE 351 werase_char = s.c_cc[VWERASE]; 352 #else 353 werase_char = CONTROL('W'); 354 #endif 355 356 /* 357 * Set the modes to the way we want them. 358 */ 359 s.c_lflag &= ~(0 360 #ifdef ICANON 361 | ICANON 362 #endif 363 #ifdef ECHO 364 | ECHO 365 #endif 366 #ifdef ECHOE 367 | ECHOE 368 #endif 369 #ifdef ECHOK 370 | ECHOK 371 #endif 372 #if ECHONL 373 | ECHONL 374 #endif 375 ); 376 377 s.c_oflag |= (0 378 #ifdef OXTABS 379 | OXTABS 380 #else 381 #ifdef TAB3 382 | TAB3 383 #else 384 #ifdef XTABS 385 | XTABS 386 #endif 387 #endif 388 #endif 389 #ifdef OPOST 390 | OPOST 391 #endif 392 #ifdef ONLCR 393 | ONLCR 394 #endif 395 ); 396 397 s.c_oflag &= ~(0 398 #ifdef ONOEOT 399 | ONOEOT 400 #endif 401 #ifdef OCRNL 402 | OCRNL 403 #endif 404 #ifdef ONOCR 405 | ONOCR 406 #endif 407 #ifdef ONLRET 408 | ONLRET 409 #endif 410 ); 411 s.c_cc[VMIN] = 1; 412 s.c_cc[VTIME] = 0; 413 #ifdef VLNEXT 414 s.c_cc[VLNEXT] = 0; 415 #endif 416 #ifdef VDSUSP 417 s.c_cc[VDSUSP] = 0; 418 #endif 419 #if MUST_SET_LINE_DISCIPLINE 420 /* 421 * System's termios is broken; need to explicitly 422 * request TERMIODISC line discipline. 423 */ 424 s.c_line = TERMIODISC; 425 #endif 426 } else 427 { 428 /* 429 * Restore saved modes. 430 */ 431 s = save_term; 432 } 433 tcsetattr(tty, TCSASOFT | TCSADRAIN, &s); 434 #if HAVE_FSYNC 435 fsync(tty); 436 #endif 437 #if MUST_SET_LINE_DISCIPLINE 438 if (!on) 439 { 440 /* 441 * Broken termios *ignores* any line discipline 442 * except TERMIODISC. A different old line discipline 443 * is therefore not restored, yet. Restore the old 444 * line discipline by hand. 445 */ 446 ioctl(tty, TIOCSETD, &save_term.c_line); 447 } 448 #endif 449 } 450 #else 451 #ifdef TCGETA 452 { 453 struct termio s; 454 static struct termio save_term; 455 static int saved_term = 0; 456 457 if (on) 458 { 459 /* 460 * Get terminal modes. 461 */ 462 ioctl(tty, TCGETA, &s); 463 464 /* 465 * Save modes and set certain variables dependent on modes. 466 */ 467 if (!saved_term) 468 { 469 save_term = s; 470 saved_term = 1; 471 } 472 #if HAVE_OSPEED 473 ospeed = s.c_cflag & CBAUD; 474 #endif 475 erase_char = s.c_cc[VERASE]; 476 kill_char = s.c_cc[VKILL]; 477 #ifdef VWERASE 478 werase_char = s.c_cc[VWERASE]; 479 #else 480 werase_char = CONTROL('W'); 481 #endif 482 483 /* 484 * Set the modes to the way we want them. 485 */ 486 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 487 s.c_oflag |= (OPOST|ONLCR|TAB3); 488 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 489 s.c_cc[VMIN] = 1; 490 s.c_cc[VTIME] = 0; 491 } else 492 { 493 /* 494 * Restore saved modes. 495 */ 496 s = save_term; 497 } 498 ioctl(tty, TCSETAW, &s); 499 } 500 #else 501 #ifdef TIOCGETP 502 { 503 struct sgttyb s; 504 static struct sgttyb save_term; 505 static int saved_term = 0; 506 507 if (on) 508 { 509 /* 510 * Get terminal modes. 511 */ 512 ioctl(tty, TIOCGETP, &s); 513 514 /* 515 * Save modes and set certain variables dependent on modes. 516 */ 517 if (!saved_term) 518 { 519 save_term = s; 520 saved_term = 1; 521 } 522 #if HAVE_OSPEED 523 ospeed = s.sg_ospeed; 524 #endif 525 erase_char = s.sg_erase; 526 kill_char = s.sg_kill; 527 werase_char = CONTROL('W'); 528 529 /* 530 * Set the modes to the way we want them. 531 */ 532 s.sg_flags |= CBREAK; 533 s.sg_flags &= ~(ECHO|XTABS); 534 } else 535 { 536 /* 537 * Restore saved modes. 538 */ 539 s = save_term; 540 } 541 ioctl(tty, TIOCSETN, &s); 542 } 543 #else 544 #ifdef _OSK 545 { 546 struct sgbuf s; 547 static struct sgbuf save_term; 548 static int saved_term = 0; 549 550 if (on) 551 { 552 /* 553 * Get terminal modes. 554 */ 555 _gs_opt(tty, &s); 556 557 /* 558 * Save modes and set certain variables dependent on modes. 559 */ 560 if (!saved_term) 561 { 562 save_term = s; 563 saved_term = 1; 564 } 565 erase_char = s.sg_bspch; 566 kill_char = s.sg_dlnch; 567 werase_char = CONTROL('W'); 568 569 /* 570 * Set the modes to the way we want them. 571 */ 572 s.sg_echo = 0; 573 s.sg_eofch = 0; 574 s.sg_pause = 0; 575 s.sg_psch = 0; 576 } else 577 { 578 /* 579 * Restore saved modes. 580 */ 581 s = save_term; 582 } 583 _ss_opt(tty, &s); 584 } 585 #else 586 /* MS-DOS, Windows, or OS2 */ 587 #if OS2 588 /* OS2 */ 589 LSIGNAL(SIGINT, SIG_IGN); 590 #endif 591 erase_char = '\b'; 592 #if MSDOS_COMPILER==DJGPPC 593 kill_char = CONTROL('U'); 594 /* 595 * So that when we shell out or run another program, its 596 * stdin is in cooked mode. We do not switch stdin to binary 597 * mode if fd0 is zero, since that means we were called before 598 * tty was reopened in open_getchr, in which case we would be 599 * changing the original stdin device outside less. 600 */ 601 if (fd0 != 0) 602 setmode(0, on ? O_BINARY : O_TEXT); 603 #else 604 kill_char = ESC; 605 #endif 606 werase_char = CONTROL('W'); 607 #endif 608 #endif 609 #endif 610 #endif 611 curr_on = on; 612 } 613 614 #if !MSDOS_COMPILER 615 /* 616 * Some glue to prevent calling termcap functions if tgetent() failed. 617 */ 618 static int hardcopy; 619 620 static char * 621 ltget_env(capname) 622 char *capname; 623 { 624 char name[16]; 625 char *s; 626 627 s = lgetenv("LESS_TERMCAP_DEBUG"); 628 if (s != NULL && *s != '\0') 629 { 630 struct env { struct env *next; char *name; char *value; }; 631 static struct env *envs = NULL; 632 struct env *p; 633 size_t len; 634 for (p = envs; p != NULL; p = p->next) 635 if (strcmp(p->name, capname) == 0) 636 return p->value; 637 p = (struct env *) ecalloc(1, sizeof(struct env)); 638 p->name = save(capname); 639 len = strlen(capname) + 3; 640 p->value = (char *) ecalloc(len, sizeof(char)); 641 snprintf(p->value, len, "<%s>", capname); 642 p->next = envs; 643 envs = p; 644 return p->value; 645 } 646 strlcpy(name, "LESS_TERMCAP_", sizeof(name)); 647 strlcat(name, capname, sizeof(name)); 648 return (lgetenv(name)); 649 } 650 651 static int 652 ltgetflag(capname) 653 char *capname; 654 { 655 char *s; 656 657 if ((s = ltget_env(capname)) != NULL) 658 return (*s != '\0' && *s != '0'); 659 if (hardcopy) 660 return (0); 661 return (tgetflag(capname)); 662 } 663 664 static int 665 ltgetnum(capname) 666 char *capname; 667 { 668 char *s; 669 670 if ((s = ltget_env(capname)) != NULL) 671 return (atoi(s)); 672 if (hardcopy) 673 return (-1); 674 return (tgetnum(capname)); 675 } 676 677 static char * 678 ltgetstr(capname, pp) 679 char *capname; 680 char **pp; 681 { 682 char *s; 683 684 if ((s = ltget_env(capname)) != NULL) 685 return (s); 686 if (hardcopy) 687 return (NULL); 688 return (tgetstr(capname, pp)); 689 } 690 #endif /* MSDOS_COMPILER */ 691 692 /* 693 * Get size of the output screen. 694 */ 695 public void 696 scrsize() 697 { 698 register char *s; 699 int sys_height; 700 int sys_width; 701 #if !MSDOS_COMPILER 702 int n; 703 #endif 704 705 #define DEF_SC_WIDTH 80 706 #if MSDOS_COMPILER 707 #define DEF_SC_HEIGHT 25 708 #else 709 #define DEF_SC_HEIGHT 24 710 #endif 711 712 713 sys_width = sys_height = 0; 714 715 #if MSDOS_COMPILER==MSOFTC 716 { 717 struct videoconfig w; 718 _getvideoconfig(&w); 719 sys_height = w.numtextrows; 720 sys_width = w.numtextcols; 721 } 722 #else 723 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 724 { 725 struct text_info w; 726 gettextinfo(&w); 727 sys_height = w.screenheight; 728 sys_width = w.screenwidth; 729 } 730 #else 731 #if MSDOS_COMPILER==WIN32C 732 { 733 CONSOLE_SCREEN_BUFFER_INFO scr; 734 GetConsoleScreenBufferInfo(con_out, &scr); 735 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 736 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 737 } 738 #else 739 #if OS2 740 { 741 int s[2]; 742 _scrsize(s); 743 sys_width = s[0]; 744 sys_height = s[1]; 745 /* 746 * When using terminal emulators for XFree86/OS2, the 747 * _scrsize function does not work well. 748 * Call the scrsize.exe program to get the window size. 749 */ 750 windowid = getenv("WINDOWID"); 751 if (windowid != NULL) 752 { 753 FILE *fd = popen("scrsize", "rt"); 754 if (fd != NULL) 755 { 756 int w, h; 757 fscanf(fd, "%i %i", &w, &h); 758 if (w > 0 && h > 0) 759 { 760 sys_width = w; 761 sys_height = h; 762 } 763 pclose(fd); 764 } 765 } 766 } 767 #else 768 #ifdef TIOCGWINSZ 769 { 770 struct winsize w; 771 if (ioctl(2, TIOCGWINSZ, &w) == 0) 772 { 773 if (w.ws_row > 0) 774 sys_height = w.ws_row; 775 if (w.ws_col > 0) 776 sys_width = w.ws_col; 777 } 778 } 779 #else 780 #ifdef WIOCGETD 781 { 782 struct uwdata w; 783 if (ioctl(2, WIOCGETD, &w) == 0) 784 { 785 if (w.uw_height > 0) 786 sys_height = w.uw_height / w.uw_vs; 787 if (w.uw_width > 0) 788 sys_width = w.uw_width / w.uw_hs; 789 } 790 } 791 #endif 792 #endif 793 #endif 794 #endif 795 #endif 796 #endif 797 798 if (sys_height > 0) 799 sc_height = sys_height; 800 else if ((s = lgetenv("LINES")) != NULL) 801 sc_height = atoi(s); 802 #if !MSDOS_COMPILER 803 else if ((n = ltgetnum("li")) > 0) 804 sc_height = n; 805 #endif 806 if (sc_height <= 0) 807 sc_height = DEF_SC_HEIGHT; 808 809 if (sys_width > 0) 810 sc_width = sys_width; 811 else if ((s = lgetenv("COLUMNS")) != NULL) 812 sc_width = atoi(s); 813 #if !MSDOS_COMPILER 814 else if ((n = ltgetnum("co")) > 0) 815 sc_width = n; 816 #endif 817 if (sc_width <= 0) 818 sc_width = DEF_SC_WIDTH; 819 } 820 821 #if MSDOS_COMPILER==MSOFTC 822 /* 823 * Figure out how many empty loops it takes to delay a millisecond. 824 */ 825 static void 826 get_clock() 827 { 828 clock_t start; 829 830 /* 831 * Get synchronized at the start of a tick. 832 */ 833 start = clock(); 834 while (clock() == start) 835 ; 836 /* 837 * Now count loops till the next tick. 838 */ 839 start = clock(); 840 msec_loops = 0; 841 while (clock() == start) 842 msec_loops++; 843 /* 844 * Convert from (loops per clock) to (loops per millisecond). 845 */ 846 msec_loops *= CLOCKS_PER_SEC; 847 msec_loops /= 1000; 848 } 849 850 /* 851 * Delay for a specified number of milliseconds. 852 */ 853 static void 854 dummy_func() 855 { 856 static long delay_dummy = 0; 857 delay_dummy++; 858 } 859 860 static void 861 delay(msec) 862 int msec; 863 { 864 long i; 865 866 while (msec-- > 0) 867 { 868 for (i = 0; i < msec_loops; i++) 869 { 870 /* 871 * Make it look like we're doing something here, 872 * so the optimizer doesn't remove the whole loop. 873 */ 874 dummy_func(); 875 } 876 } 877 } 878 #endif 879 880 /* 881 * Return the characters actually input by a "special" key. 882 */ 883 public char * 884 special_key_str(key) 885 int key; 886 { 887 static char tbuf[40]; 888 char *s; 889 #if MSDOS_COMPILER || OS2 890 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 891 static char k_left[] = { '\340', PCK_LEFT, 0 }; 892 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 893 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 894 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 895 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 896 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 897 static char k_ctl_backspace[] = { '\177', 0 }; 898 static char k_home[] = { '\340', PCK_HOME, 0 }; 899 static char k_end[] = { '\340', PCK_END, 0 }; 900 static char k_up[] = { '\340', PCK_UP, 0 }; 901 static char k_down[] = { '\340', PCK_DOWN, 0 }; 902 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 903 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 904 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 905 static char k_f1[] = { '\340', PCK_F1, 0 }; 906 #endif 907 #if !MSDOS_COMPILER 908 char *sp = tbuf; 909 #endif 910 911 switch (key) 912 { 913 #if OS2 914 /* 915 * If windowid is not NULL, assume less is executed in 916 * the XFree86 environment. 917 */ 918 case SK_RIGHT_ARROW: 919 s = windowid ? ltgetstr("kr", &sp) : k_right; 920 break; 921 case SK_LEFT_ARROW: 922 s = windowid ? ltgetstr("kl", &sp) : k_left; 923 break; 924 case SK_UP_ARROW: 925 s = windowid ? ltgetstr("ku", &sp) : k_up; 926 break; 927 case SK_DOWN_ARROW: 928 s = windowid ? ltgetstr("kd", &sp) : k_down; 929 break; 930 case SK_PAGE_UP: 931 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 932 break; 933 case SK_PAGE_DOWN: 934 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 935 break; 936 case SK_HOME: 937 s = windowid ? ltgetstr("kh", &sp) : k_home; 938 break; 939 case SK_END: 940 s = windowid ? ltgetstr("@7", &sp) : k_end; 941 break; 942 case SK_DELETE: 943 if (windowid) 944 { 945 s = ltgetstr("kD", &sp); 946 if (s == NULL) 947 { 948 tbuf[0] = '\177'; 949 tbuf[1] = '\0'; 950 s = tbuf; 951 } 952 } else 953 s = k_delete; 954 break; 955 #endif 956 #if MSDOS_COMPILER 957 case SK_RIGHT_ARROW: 958 s = k_right; 959 break; 960 case SK_LEFT_ARROW: 961 s = k_left; 962 break; 963 case SK_UP_ARROW: 964 s = k_up; 965 break; 966 case SK_DOWN_ARROW: 967 s = k_down; 968 break; 969 case SK_PAGE_UP: 970 s = k_pageup; 971 break; 972 case SK_PAGE_DOWN: 973 s = k_pagedown; 974 break; 975 case SK_HOME: 976 s = k_home; 977 break; 978 case SK_END: 979 s = k_end; 980 break; 981 case SK_DELETE: 982 s = k_delete; 983 break; 984 #endif 985 #if MSDOS_COMPILER || OS2 986 case SK_INSERT: 987 s = k_insert; 988 break; 989 case SK_CTL_LEFT_ARROW: 990 s = k_ctl_left; 991 break; 992 case SK_CTL_RIGHT_ARROW: 993 s = k_ctl_right; 994 break; 995 case SK_CTL_BACKSPACE: 996 s = k_ctl_backspace; 997 break; 998 case SK_CTL_DELETE: 999 s = k_ctl_delete; 1000 break; 1001 case SK_F1: 1002 s = k_f1; 1003 break; 1004 case SK_BACKTAB: 1005 s = k_backtab; 1006 break; 1007 #else 1008 case SK_RIGHT_ARROW: 1009 s = ltgetstr("kr", &sp); 1010 break; 1011 case SK_LEFT_ARROW: 1012 s = ltgetstr("kl", &sp); 1013 break; 1014 case SK_UP_ARROW: 1015 s = ltgetstr("ku", &sp); 1016 break; 1017 case SK_DOWN_ARROW: 1018 s = ltgetstr("kd", &sp); 1019 break; 1020 case SK_PAGE_UP: 1021 s = ltgetstr("kP", &sp); 1022 break; 1023 case SK_PAGE_DOWN: 1024 s = ltgetstr("kN", &sp); 1025 break; 1026 case SK_HOME: 1027 s = ltgetstr("kh", &sp); 1028 break; 1029 case SK_END: 1030 s = ltgetstr("@7", &sp); 1031 break; 1032 case SK_DELETE: 1033 s = ltgetstr("kD", &sp); 1034 if (s == NULL) 1035 { 1036 tbuf[0] = '\177'; 1037 tbuf[1] = '\0'; 1038 s = tbuf; 1039 } 1040 break; 1041 #endif 1042 case SK_CONTROL_K: 1043 tbuf[0] = CONTROL('K'); 1044 tbuf[1] = '\0'; 1045 s = tbuf; 1046 break; 1047 default: 1048 return (NULL); 1049 } 1050 return (s); 1051 } 1052 1053 /* 1054 * Get terminal capabilities via termcap. 1055 */ 1056 public void 1057 get_term() 1058 { 1059 #if MSDOS_COMPILER 1060 auto_wrap = 1; 1061 ignaw = 0; 1062 can_goto_line = 1; 1063 clear_bg = 1; 1064 /* 1065 * Set up default colors. 1066 * The xx_s_width and xx_e_width vars are already initialized to 0. 1067 */ 1068 #if MSDOS_COMPILER==MSOFTC 1069 sy_bg_color = _getbkcolor(); 1070 sy_fg_color = _gettextcolor(); 1071 get_clock(); 1072 #else 1073 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1074 { 1075 struct text_info w; 1076 gettextinfo(&w); 1077 sy_bg_color = (w.attribute >> 4) & 0x0F; 1078 sy_fg_color = (w.attribute >> 0) & 0x0F; 1079 } 1080 #else 1081 #if MSDOS_COMPILER==WIN32C 1082 { 1083 DWORD nread; 1084 CONSOLE_SCREEN_BUFFER_INFO scr; 1085 1086 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1087 /* 1088 * Always open stdin in binary. Note this *must* be done 1089 * before any file operations have been done on fd0. 1090 */ 1091 SET_BINARY(0); 1092 GetConsoleScreenBufferInfo(con_out, &scr); 1093 ReadConsoleOutputAttribute(con_out, &curr_attr, 1094 1, scr.dwCursorPosition, &nread); 1095 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1096 sy_fg_color = curr_attr & FG_COLORS; 1097 } 1098 #endif 1099 #endif 1100 #endif 1101 nm_fg_color = sy_fg_color; 1102 nm_bg_color = sy_bg_color; 1103 bo_fg_color = 11; 1104 bo_bg_color = 0; 1105 ul_fg_color = 9; 1106 ul_bg_color = 0; 1107 so_fg_color = 15; 1108 so_bg_color = 9; 1109 bl_fg_color = 15; 1110 bl_bg_color = 0; 1111 1112 /* 1113 * Get size of the screen. 1114 */ 1115 scrsize(); 1116 pos_init(); 1117 1118 1119 #else /* !MSDOS_COMPILER */ 1120 1121 char *sp; 1122 register char *t1, *t2; 1123 char *term; 1124 char termbuf[TERMBUF_SIZE]; 1125 1126 static char sbuf[TERMSBUF_SIZE]; 1127 1128 #if OS2 1129 /* 1130 * Make sure the termcap database is available. 1131 */ 1132 sp = lgetenv("TERMCAP"); 1133 if (sp == NULL || *sp == '\0') 1134 { 1135 char *termcap; 1136 if ((sp = homefile("termcap.dat")) != NULL) 1137 { 1138 size_t len = strlen(sp) + 9; 1139 termcap = (char *) ecalloc(len, sizeof(char)); 1140 snprintf(termcap, len, "TERMCAP=%s", sp); 1141 free(sp); 1142 putenv(termcap); 1143 } 1144 } 1145 #endif 1146 /* 1147 * Find out what kind of terminal this is. 1148 */ 1149 if ((term = lgetenv("TERM")) == NULL) 1150 term = DEFAULT_TERM; 1151 hardcopy = 0; 1152 if (tgetent(termbuf, term) != TGETENT_OK) 1153 hardcopy = 1; 1154 if (ltgetflag("hc")) 1155 hardcopy = 1; 1156 1157 /* 1158 * Get size of the screen. 1159 */ 1160 scrsize(); 1161 pos_init(); 1162 1163 auto_wrap = ltgetflag("am"); 1164 ignaw = ltgetflag("xn"); 1165 above_mem = ltgetflag("da"); 1166 below_mem = ltgetflag("db"); 1167 clear_bg = ltgetflag("ut"); 1168 1169 /* 1170 * Assumes termcap variable "sg" is the printing width of: 1171 * the standout sequence, the end standout sequence, 1172 * the underline sequence, the end underline sequence, 1173 * the boldface sequence, and the end boldface sequence. 1174 */ 1175 if ((so_s_width = ltgetnum("sg")) < 0) 1176 so_s_width = 0; 1177 so_e_width = so_s_width; 1178 1179 bo_s_width = bo_e_width = so_s_width; 1180 ul_s_width = ul_e_width = so_s_width; 1181 bl_s_width = bl_e_width = so_s_width; 1182 1183 #if HILITE_SEARCH 1184 if (so_s_width > 0 || so_e_width > 0) 1185 /* 1186 * Disable highlighting by default on magic cookie terminals. 1187 * Turning on highlighting might change the displayed width 1188 * of a line, causing the display to get messed up. 1189 * The user can turn it back on with -g, 1190 * but she won't like the results. 1191 */ 1192 hilite_search = 0; 1193 #endif 1194 1195 /* 1196 * Get various string-valued capabilities. 1197 */ 1198 sp = sbuf; 1199 1200 #if HAVE_OSPEED 1201 sc_pad = ltgetstr("pc", &sp); 1202 if (sc_pad != NULL) 1203 PC = *sc_pad; 1204 #endif 1205 1206 sc_s_keypad = ltgetstr("ks", &sp); 1207 if (sc_s_keypad == NULL) 1208 sc_s_keypad = ""; 1209 sc_e_keypad = ltgetstr("ke", &sp); 1210 if (sc_e_keypad == NULL) 1211 sc_e_keypad = ""; 1212 1213 sc_init = ltgetstr("ti", &sp); 1214 if (sc_init == NULL) 1215 sc_init = ""; 1216 1217 sc_deinit= ltgetstr("te", &sp); 1218 if (sc_deinit == NULL) 1219 sc_deinit = ""; 1220 1221 sc_eol_clear = ltgetstr("ce", &sp); 1222 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1223 { 1224 missing_cap = 1; 1225 sc_eol_clear = ""; 1226 } 1227 1228 sc_eos_clear = ltgetstr("cd", &sp); 1229 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1230 { 1231 missing_cap = 1; 1232 sc_eos_clear = ""; 1233 } 1234 1235 sc_clear = ltgetstr("cl", &sp); 1236 if (sc_clear == NULL || *sc_clear == '\0') 1237 { 1238 missing_cap = 1; 1239 sc_clear = "\n\n"; 1240 } 1241 1242 sc_move = ltgetstr("cm", &sp); 1243 if (sc_move == NULL || *sc_move == '\0') 1244 { 1245 /* 1246 * This is not an error here, because we don't 1247 * always need sc_move. 1248 * We need it only if we don't have home or lower-left. 1249 */ 1250 sc_move = ""; 1251 can_goto_line = 0; 1252 } else 1253 can_goto_line = 1; 1254 1255 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1256 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1257 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1258 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1259 1260 sc_visual_bell = ltgetstr("vb", &sp); 1261 if (sc_visual_bell == NULL) 1262 sc_visual_bell = ""; 1263 1264 if (ltgetflag("bs")) 1265 sc_backspace = "\b"; 1266 else 1267 { 1268 sc_backspace = ltgetstr("bc", &sp); 1269 if (sc_backspace == NULL || *sc_backspace == '\0') 1270 sc_backspace = "\b"; 1271 } 1272 1273 /* 1274 * Choose between using "ho" and "cm" ("home" and "cursor move") 1275 * to move the cursor to the upper left corner of the screen. 1276 */ 1277 t1 = ltgetstr("ho", &sp); 1278 if (t1 == NULL) 1279 t1 = ""; 1280 if (*sc_move == '\0') 1281 t2 = ""; 1282 else 1283 { 1284 strlcpy(sp, tgoto(sc_move, 0, 0), sbuf + sizeof(sbuf) - sp); 1285 t2 = sp; 1286 sp += strlen(sp) + 1; 1287 } 1288 sc_home = cheaper(t1, t2, "|\b^"); 1289 1290 /* 1291 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1292 * to move the cursor to the lower left corner of the screen. 1293 */ 1294 t1 = ltgetstr("ll", &sp); 1295 if (t1 == NULL) 1296 t1 = ""; 1297 if (*sc_move == '\0') 1298 t2 = ""; 1299 else 1300 { 1301 strlcpy(sp, tgoto(sc_move, 0, sc_height-1), 1302 sbuf + sizeof(sbuf) - sp); 1303 t2 = sp; 1304 sp += strlen(sp) + 1; 1305 } 1306 sc_lower_left = cheaper(t1, t2, "\r"); 1307 1308 /* 1309 * Get carriage return string. 1310 */ 1311 sc_return = ltgetstr("cr", &sp); 1312 if (sc_return == NULL) 1313 sc_return = "\r"; 1314 1315 /* 1316 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1317 * to add a line at the top of the screen. 1318 */ 1319 t1 = ltgetstr("al", &sp); 1320 if (t1 == NULL) 1321 t1 = ""; 1322 t2 = ltgetstr("sr", &sp); 1323 if (t2 == NULL) 1324 t2 = ""; 1325 #if OS2 1326 if (*t1 == '\0' && *t2 == '\0') 1327 sc_addline = ""; 1328 else 1329 #endif 1330 if (above_mem) 1331 sc_addline = t1; 1332 else 1333 sc_addline = cheaper(t1, t2, ""); 1334 if (*sc_addline == '\0') 1335 { 1336 /* 1337 * Force repaint on any backward movement. 1338 */ 1339 no_back_scroll = 1; 1340 } 1341 #endif /* MSDOS_COMPILER */ 1342 } 1343 1344 #if !MSDOS_COMPILER 1345 /* 1346 * Return the cost of displaying a termcap string. 1347 * We use the trick of calling tputs, but as a char printing function 1348 * we give it inc_costcount, which just increments "costcount". 1349 * This tells us how many chars would be printed by using this string. 1350 * {{ Couldn't we just use strlen? }} 1351 */ 1352 static int costcount; 1353 1354 /*ARGSUSED*/ 1355 static int 1356 inc_costcount(c) 1357 int c; 1358 { 1359 costcount++; 1360 return (c); 1361 } 1362 1363 static int 1364 cost(t) 1365 char *t; 1366 { 1367 costcount = 0; 1368 tputs(t, sc_height, inc_costcount); 1369 return (costcount); 1370 } 1371 1372 /* 1373 * Return the "best" of the two given termcap strings. 1374 * The best, if both exist, is the one with the lower 1375 * cost (see cost() function). 1376 */ 1377 static char * 1378 cheaper(t1, t2, def) 1379 char *t1, *t2; 1380 char *def; 1381 { 1382 if (*t1 == '\0' && *t2 == '\0') 1383 { 1384 missing_cap = 1; 1385 return (def); 1386 } 1387 if (*t1 == '\0') 1388 return (t2); 1389 if (*t2 == '\0') 1390 return (t1); 1391 if (cost(t1) < cost(t2)) 1392 return (t1); 1393 return (t2); 1394 } 1395 1396 static void 1397 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1398 char *incap; 1399 char *outcap; 1400 char **instr; 1401 char **outstr; 1402 char *def_instr; 1403 char *def_outstr; 1404 char **spp; 1405 { 1406 *instr = ltgetstr(incap, spp); 1407 if (*instr == NULL) 1408 { 1409 /* Use defaults. */ 1410 *instr = def_instr; 1411 *outstr = def_outstr; 1412 return; 1413 } 1414 1415 *outstr = ltgetstr(outcap, spp); 1416 if (*outstr == NULL) 1417 /* No specific out capability; use "me". */ 1418 *outstr = ltgetstr("me", spp); 1419 if (*outstr == NULL) 1420 /* Don't even have "me"; use a null string. */ 1421 *outstr = ""; 1422 } 1423 1424 #endif /* MSDOS_COMPILER */ 1425 1426 1427 /* 1428 * Below are the functions which perform all the 1429 * terminal-specific screen manipulation. 1430 */ 1431 1432 1433 #if MSDOS_COMPILER 1434 1435 #if MSDOS_COMPILER==WIN32C 1436 static void 1437 _settextposition(int row, int col) 1438 { 1439 COORD cpos; 1440 CONSOLE_SCREEN_BUFFER_INFO csbi; 1441 1442 GetConsoleScreenBufferInfo(con_out, &csbi); 1443 cpos.X = csbi.srWindow.Left + (col - 1); 1444 cpos.Y = csbi.srWindow.Top + (row - 1); 1445 SetConsoleCursorPosition(con_out, cpos); 1446 } 1447 #endif 1448 1449 /* 1450 * Initialize the screen to the correct color at startup. 1451 */ 1452 static void 1453 initcolor() 1454 { 1455 SETCOLORS(nm_fg_color, nm_bg_color); 1456 #if 0 1457 /* 1458 * This clears the screen at startup. This is different from 1459 * the behavior of other versions of less. Disable it for now. 1460 */ 1461 char *blanks; 1462 int row; 1463 int col; 1464 1465 /* 1466 * Create a complete, blank screen using "normal" colors. 1467 */ 1468 SETCOLORS(nm_fg_color, nm_bg_color); 1469 blanks = (char *) ecalloc(width+1, sizeof(char)); 1470 for (col = 0; col < sc_width; col++) 1471 blanks[col] = ' '; 1472 blanks[sc_width] = '\0'; 1473 for (row = 0; row < sc_height; row++) 1474 _outtext(blanks); 1475 free(blanks); 1476 #endif 1477 } 1478 #endif 1479 1480 #if MSDOS_COMPILER==WIN32C 1481 1482 /* 1483 * Termcap-like init with a private win32 console. 1484 */ 1485 static void 1486 win32_init_term() 1487 { 1488 CONSOLE_SCREEN_BUFFER_INFO scr; 1489 COORD size; 1490 1491 if (con_out_save == INVALID_HANDLE_VALUE) 1492 return; 1493 1494 GetConsoleScreenBufferInfo(con_out_save, &scr); 1495 1496 if (con_out_ours == INVALID_HANDLE_VALUE) 1497 { 1498 /* 1499 * Create our own screen buffer, so that we 1500 * may restore the original when done. 1501 */ 1502 con_out_ours = CreateConsoleScreenBuffer( 1503 GENERIC_WRITE | GENERIC_READ, 1504 FILE_SHARE_WRITE | FILE_SHARE_READ, 1505 (LPSECURITY_ATTRIBUTES) NULL, 1506 CONSOLE_TEXTMODE_BUFFER, 1507 (LPVOID) NULL); 1508 } 1509 1510 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1511 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1512 SetConsoleScreenBufferSize(con_out_ours, size); 1513 SetConsoleActiveScreenBuffer(con_out_ours); 1514 con_out = con_out_ours; 1515 } 1516 1517 /* 1518 * Restore the startup console. 1519 */ 1520 static void 1521 win32_deinit_term() 1522 { 1523 if (con_out_save == INVALID_HANDLE_VALUE) 1524 return; 1525 if (quitting) 1526 (void) CloseHandle(con_out_ours); 1527 SetConsoleActiveScreenBuffer(con_out_save); 1528 con_out = con_out_save; 1529 } 1530 1531 #endif 1532 1533 /* 1534 * Initialize terminal 1535 */ 1536 public void 1537 init() 1538 { 1539 #if !MSDOS_COMPILER 1540 if (!no_init) 1541 tputs(sc_init, sc_height, putchr); 1542 if (!no_keypad) 1543 tputs(sc_s_keypad, sc_height, putchr); 1544 if (top_scroll) 1545 { 1546 int i; 1547 1548 /* 1549 * This is nice to terminals with no alternate screen, 1550 * but with saved scrolled-off-the-top lines. This way, 1551 * no previous line is lost, but we start with a whole 1552 * screen to ourself. 1553 */ 1554 for (i = 1; i < sc_height; i++) 1555 putchr('\n'); 1556 } else 1557 line_left(); 1558 #else 1559 #if MSDOS_COMPILER==WIN32C 1560 if (!no_init) 1561 win32_init_term(); 1562 #endif 1563 initcolor(); 1564 flush(); 1565 #endif 1566 init_done = 1; 1567 } 1568 1569 /* 1570 * Deinitialize terminal 1571 */ 1572 public void 1573 deinit() 1574 { 1575 if (!init_done) 1576 return; 1577 #if !MSDOS_COMPILER 1578 if (!no_keypad) 1579 tputs(sc_e_keypad, sc_height, putchr); 1580 if (!no_init) 1581 tputs(sc_deinit, sc_height, putchr); 1582 #else 1583 /* Restore system colors. */ 1584 SETCOLORS(sy_fg_color, sy_bg_color); 1585 #if MSDOS_COMPILER==WIN32C 1586 if (!no_init) 1587 win32_deinit_term(); 1588 #else 1589 /* Need clreol to make SETCOLORS take effect. */ 1590 clreol(); 1591 #endif 1592 #endif 1593 init_done = 0; 1594 } 1595 1596 /* 1597 * Home cursor (move to upper left corner of screen). 1598 */ 1599 public void 1600 home() 1601 { 1602 #if !MSDOS_COMPILER 1603 tputs(sc_home, 1, putchr); 1604 #else 1605 flush(); 1606 _settextposition(1,1); 1607 #endif 1608 } 1609 1610 /* 1611 * Add a blank line (called with cursor at home). 1612 * Should scroll the display down. 1613 */ 1614 public void 1615 add_line() 1616 { 1617 #if !MSDOS_COMPILER 1618 tputs(sc_addline, sc_height, putchr); 1619 #else 1620 flush(); 1621 #if MSDOS_COMPILER==MSOFTC 1622 _scrolltextwindow(_GSCROLLDOWN); 1623 _settextposition(1,1); 1624 #else 1625 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1626 movetext(1,1, sc_width,sc_height-1, 1,2); 1627 gotoxy(1,1); 1628 clreol(); 1629 #else 1630 #if MSDOS_COMPILER==WIN32C 1631 { 1632 CHAR_INFO fillchar; 1633 SMALL_RECT rcSrc, rcClip; 1634 COORD new_org; 1635 CONSOLE_SCREEN_BUFFER_INFO csbi; 1636 1637 GetConsoleScreenBufferInfo(con_out,&csbi); 1638 1639 /* The clip rectangle is the entire visible screen. */ 1640 rcClip.Left = csbi.srWindow.Left; 1641 rcClip.Top = csbi.srWindow.Top; 1642 rcClip.Right = csbi.srWindow.Right; 1643 rcClip.Bottom = csbi.srWindow.Bottom; 1644 1645 /* The source rectangle is the visible screen minus the last line. */ 1646 rcSrc = rcClip; 1647 rcSrc.Bottom--; 1648 1649 /* Move the top left corner of the source window down one row. */ 1650 new_org.X = rcSrc.Left; 1651 new_org.Y = rcSrc.Top + 1; 1652 1653 /* Fill the right character and attributes. */ 1654 fillchar.Char.AsciiChar = ' '; 1655 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1656 fillchar.Attributes = curr_attr; 1657 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1658 _settextposition(1,1); 1659 } 1660 #endif 1661 #endif 1662 #endif 1663 #endif 1664 } 1665 1666 #if 0 1667 /* 1668 * Remove the n topmost lines and scroll everything below it in the 1669 * window upward. This is needed to stop leaking the topmost line 1670 * into the scrollback buffer when we go down-one-line (in WIN32). 1671 */ 1672 public void 1673 remove_top(n) 1674 int n; 1675 { 1676 #if MSDOS_COMPILER==WIN32C 1677 SMALL_RECT rcSrc, rcClip; 1678 CHAR_INFO fillchar; 1679 COORD new_org; 1680 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1681 1682 if (n >= sc_height - 1) 1683 { 1684 clear(); 1685 home(); 1686 return; 1687 } 1688 1689 flush(); 1690 1691 GetConsoleScreenBufferInfo(con_out, &csbi); 1692 1693 /* Get the extent of all-visible-rows-but-the-last. */ 1694 rcSrc.Left = csbi.srWindow.Left; 1695 rcSrc.Top = csbi.srWindow.Top + n; 1696 rcSrc.Right = csbi.srWindow.Right; 1697 rcSrc.Bottom = csbi.srWindow.Bottom; 1698 1699 /* Get the clip rectangle. */ 1700 rcClip.Left = rcSrc.Left; 1701 rcClip.Top = csbi.srWindow.Top; 1702 rcClip.Right = rcSrc.Right; 1703 rcClip.Bottom = rcSrc.Bottom ; 1704 1705 /* Move the source window up n rows. */ 1706 new_org.X = rcSrc.Left; 1707 new_org.Y = rcSrc.Top - n; 1708 1709 /* Fill the right character and attributes. */ 1710 fillchar.Char.AsciiChar = ' '; 1711 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1712 fillchar.Attributes = curr_attr; 1713 1714 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1715 1716 /* Position cursor on first blank line. */ 1717 goto_line(sc_height - n - 1); 1718 #endif 1719 } 1720 #endif 1721 1722 #if MSDOS_COMPILER==WIN32C 1723 /* 1724 * Clear the screen. 1725 */ 1726 static void 1727 win32_clear() 1728 { 1729 /* 1730 * This will clear only the currently visible rows of the NT 1731 * console buffer, which means none of the precious scrollback 1732 * rows are touched making for faster scrolling. Note that, if 1733 * the window has fewer columns than the console buffer (i.e. 1734 * there is a horizontal scrollbar as well), the entire width 1735 * of the visible rows will be cleared. 1736 */ 1737 COORD topleft; 1738 DWORD nchars; 1739 DWORD winsz; 1740 CONSOLE_SCREEN_BUFFER_INFO csbi; 1741 1742 /* get the number of cells in the current buffer */ 1743 GetConsoleScreenBufferInfo(con_out, &csbi); 1744 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1745 topleft.X = 0; 1746 topleft.Y = csbi.srWindow.Top; 1747 1748 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1749 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1750 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1751 } 1752 1753 /* 1754 * Remove the n topmost lines and scroll everything below it in the 1755 * window upward. 1756 */ 1757 public void 1758 win32_scroll_up(n) 1759 int n; 1760 { 1761 SMALL_RECT rcSrc, rcClip; 1762 CHAR_INFO fillchar; 1763 COORD topleft; 1764 COORD new_org; 1765 DWORD nchars; 1766 DWORD size; 1767 CONSOLE_SCREEN_BUFFER_INFO csbi; 1768 1769 if (n <= 0) 1770 return; 1771 1772 if (n >= sc_height - 1) 1773 { 1774 win32_clear(); 1775 _settextposition(1,1); 1776 return; 1777 } 1778 1779 /* Get the extent of what will remain visible after scrolling. */ 1780 GetConsoleScreenBufferInfo(con_out, &csbi); 1781 rcSrc.Left = csbi.srWindow.Left; 1782 rcSrc.Top = csbi.srWindow.Top + n; 1783 rcSrc.Right = csbi.srWindow.Right; 1784 rcSrc.Bottom = csbi.srWindow.Bottom; 1785 1786 /* Get the clip rectangle. */ 1787 rcClip.Left = rcSrc.Left; 1788 rcClip.Top = csbi.srWindow.Top; 1789 rcClip.Right = rcSrc.Right; 1790 rcClip.Bottom = rcSrc.Bottom ; 1791 1792 /* Move the source text to the top of the screen. */ 1793 new_org.X = rcSrc.Left; 1794 new_org.Y = rcClip.Top; 1795 1796 /* Fill the right character and attributes. */ 1797 fillchar.Char.AsciiChar = ' '; 1798 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1799 1800 /* Scroll the window. */ 1801 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1802 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1803 1804 /* Clear remaining lines at bottom. */ 1805 topleft.X = csbi.dwCursorPosition.X; 1806 topleft.Y = rcSrc.Bottom - n; 1807 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1808 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1809 &nchars); 1810 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1811 &nchars); 1812 SetConsoleTextAttribute(con_out, curr_attr); 1813 1814 /* Move cursor n lines up from where it was. */ 1815 csbi.dwCursorPosition.Y -= n; 1816 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1817 } 1818 #endif 1819 1820 /* 1821 * Move cursor to lower left corner of screen. 1822 */ 1823 public void 1824 lower_left() 1825 { 1826 #if !MSDOS_COMPILER 1827 tputs(sc_lower_left, 1, putchr); 1828 #else 1829 flush(); 1830 _settextposition(sc_height, 1); 1831 #endif 1832 } 1833 1834 /* 1835 * Move cursor to left position of current line. 1836 */ 1837 public void 1838 line_left() 1839 { 1840 #if !MSDOS_COMPILER 1841 tputs(sc_return, 1, putchr); 1842 #else 1843 int row; 1844 flush(); 1845 #if MSDOS_COMPILER==WIN32C 1846 { 1847 CONSOLE_SCREEN_BUFFER_INFO scr; 1848 GetConsoleScreenBufferInfo(con_out, &scr); 1849 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 1850 } 1851 #else 1852 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1853 row = wherey(); 1854 #else 1855 { 1856 struct rccoord tpos = _gettextposition(); 1857 row = tpos.row; 1858 } 1859 #endif 1860 #endif 1861 _settextposition(row, 1); 1862 #endif 1863 } 1864 1865 /* 1866 * Check if the console size has changed and reset internals 1867 * (in lieu of SIGWINCH for WIN32). 1868 */ 1869 public void 1870 check_winch() 1871 { 1872 #if MSDOS_COMPILER==WIN32C 1873 CONSOLE_SCREEN_BUFFER_INFO scr; 1874 COORD size; 1875 1876 if (con_out == INVALID_HANDLE_VALUE) 1877 return; 1878 1879 flush(); 1880 GetConsoleScreenBufferInfo(con_out, &scr); 1881 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1882 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1883 if (size.Y != sc_height || size.X != sc_width) 1884 { 1885 sc_height = size.Y; 1886 sc_width = size.X; 1887 if (!no_init && con_out_ours == con_out) 1888 SetConsoleScreenBufferSize(con_out, size); 1889 pos_init(); 1890 wscroll = (sc_height + 1) / 2; 1891 screen_trashed = 1; 1892 } 1893 #endif 1894 } 1895 1896 /* 1897 * Goto a specific line on the screen. 1898 */ 1899 public void 1900 goto_line(slinenum) 1901 int slinenum; 1902 { 1903 #if !MSDOS_COMPILER 1904 tputs(tgoto(sc_move, 0, slinenum), 1, putchr); 1905 #else 1906 flush(); 1907 _settextposition(slinenum+1, 1); 1908 #endif 1909 } 1910 1911 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1912 /* 1913 * Create an alternate screen which is all white. 1914 * This screen is used to create a "flash" effect, by displaying it 1915 * briefly and then switching back to the normal screen. 1916 * {{ Yuck! There must be a better way to get a visual bell. }} 1917 */ 1918 static void 1919 create_flash() 1920 { 1921 #if MSDOS_COMPILER==MSOFTC 1922 struct videoconfig w; 1923 char *blanks; 1924 int row, col; 1925 1926 _getvideoconfig(&w); 1927 videopages = w.numvideopages; 1928 if (videopages < 2) 1929 { 1930 at_enter(AT_STANDOUT); 1931 at_exit(); 1932 } else 1933 { 1934 _setactivepage(1); 1935 at_enter(AT_STANDOUT); 1936 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1937 for (col = 0; col < w.numtextcols; col++) 1938 blanks[col] = ' '; 1939 for (row = w.numtextrows; row > 0; row--) 1940 _outmem(blanks, w.numtextcols); 1941 _setactivepage(0); 1942 _setvisualpage(0); 1943 free(blanks); 1944 at_exit(); 1945 } 1946 #else 1947 #if MSDOS_COMPILER==BORLANDC 1948 register int n; 1949 1950 whitescreen = (unsigned short *) 1951 malloc(sc_width * sc_height * sizeof(short)); 1952 if (whitescreen == NULL) 1953 return; 1954 for (n = 0; n < sc_width * sc_height; n++) 1955 whitescreen[n] = 0x7020; 1956 #else 1957 #if MSDOS_COMPILER==WIN32C 1958 register int n; 1959 1960 whitescreen = (WORD *) 1961 malloc(sc_height * sc_width * sizeof(WORD)); 1962 if (whitescreen == NULL) 1963 return; 1964 /* Invert the standard colors. */ 1965 for (n = 0; n < sc_width * sc_height; n++) 1966 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1967 #endif 1968 #endif 1969 #endif 1970 flash_created = 1; 1971 } 1972 #endif /* MSDOS_COMPILER */ 1973 1974 /* 1975 * Output the "visual bell", if there is one. 1976 */ 1977 public void 1978 vbell() 1979 { 1980 #if !MSDOS_COMPILER 1981 if (*sc_visual_bell == '\0') 1982 return; 1983 tputs(sc_visual_bell, sc_height, putchr); 1984 #else 1985 #if MSDOS_COMPILER==DJGPPC 1986 ScreenVisualBell(); 1987 #else 1988 #if MSDOS_COMPILER==MSOFTC 1989 /* 1990 * Create a flash screen on the second video page. 1991 * Switch to that page, then switch back. 1992 */ 1993 if (!flash_created) 1994 create_flash(); 1995 if (videopages < 2) 1996 return; 1997 _setvisualpage(1); 1998 delay(100); 1999 _setvisualpage(0); 2000 #else 2001 #if MSDOS_COMPILER==BORLANDC 2002 unsigned short *currscreen; 2003 2004 /* 2005 * Get a copy of the current screen. 2006 * Display the flash screen. 2007 * Then restore the old screen. 2008 */ 2009 if (!flash_created) 2010 create_flash(); 2011 if (whitescreen == NULL) 2012 return; 2013 currscreen = (unsigned short *) 2014 malloc(sc_width * sc_height * sizeof(short)); 2015 if (currscreen == NULL) return; 2016 gettext(1, 1, sc_width, sc_height, currscreen); 2017 puttext(1, 1, sc_width, sc_height, whitescreen); 2018 delay(100); 2019 puttext(1, 1, sc_width, sc_height, currscreen); 2020 free(currscreen); 2021 #else 2022 #if MSDOS_COMPILER==WIN32C 2023 /* paint screen with an inverse color */ 2024 clear(); 2025 2026 /* leave it displayed for 100 msec. */ 2027 Sleep(100); 2028 2029 /* restore with a redraw */ 2030 repaint(); 2031 #endif 2032 #endif 2033 #endif 2034 #endif 2035 #endif 2036 } 2037 2038 /* 2039 * Make a noise. 2040 */ 2041 static void 2042 beep() 2043 { 2044 #if !MSDOS_COMPILER 2045 putchr(CONTROL('G')); 2046 #else 2047 #if MSDOS_COMPILER==WIN32C 2048 MessageBeep(0); 2049 #else 2050 write(STDOUT_FILENO, "\7", 1); 2051 #endif 2052 #endif 2053 } 2054 2055 /* 2056 * Ring the terminal bell. 2057 */ 2058 public void 2059 bell() 2060 { 2061 if (quiet == VERY_QUIET) 2062 vbell(); 2063 else 2064 beep(); 2065 } 2066 2067 /* 2068 * Clear the screen. 2069 */ 2070 public void 2071 clear() 2072 { 2073 #if !MSDOS_COMPILER 2074 tputs(sc_clear, sc_height, putchr); 2075 #else 2076 flush(); 2077 #if MSDOS_COMPILER==WIN32C 2078 win32_clear(); 2079 #else 2080 _clearscreen(_GCLEARSCREEN); 2081 #endif 2082 #endif 2083 } 2084 2085 /* 2086 * Clear from the cursor to the end of the cursor's line. 2087 * {{ This must not move the cursor. }} 2088 */ 2089 public void 2090 clear_eol() 2091 { 2092 #if !MSDOS_COMPILER 2093 tputs(sc_eol_clear, 1, putchr); 2094 #else 2095 #if MSDOS_COMPILER==MSOFTC 2096 short top, left; 2097 short bot, right; 2098 struct rccoord tpos; 2099 2100 flush(); 2101 /* 2102 * Save current state. 2103 */ 2104 tpos = _gettextposition(); 2105 _gettextwindow(&top, &left, &bot, &right); 2106 /* 2107 * Set a temporary window to the current line, 2108 * from the cursor's position to the right edge of the screen. 2109 * Then clear that window. 2110 */ 2111 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2112 _clearscreen(_GWINDOW); 2113 /* 2114 * Restore state. 2115 */ 2116 _settextwindow(top, left, bot, right); 2117 _settextposition(tpos.row, tpos.col); 2118 #else 2119 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2120 flush(); 2121 clreol(); 2122 #else 2123 #if MSDOS_COMPILER==WIN32C 2124 DWORD nchars; 2125 COORD cpos; 2126 CONSOLE_SCREEN_BUFFER_INFO scr; 2127 2128 flush(); 2129 memset(&scr, 0, sizeof(scr)); 2130 GetConsoleScreenBufferInfo(con_out, &scr); 2131 cpos.X = scr.dwCursorPosition.X; 2132 cpos.Y = scr.dwCursorPosition.Y; 2133 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2134 FillConsoleOutputAttribute(con_out, curr_attr, 2135 scr.dwSize.X - cpos.X, cpos, &nchars); 2136 FillConsoleOutputCharacter(con_out, ' ', 2137 scr.dwSize.X - cpos.X, cpos, &nchars); 2138 #endif 2139 #endif 2140 #endif 2141 #endif 2142 } 2143 2144 /* 2145 * Clear the current line. 2146 * Clear the screen if there's off-screen memory below the display. 2147 */ 2148 static void 2149 clear_eol_bot() 2150 { 2151 #if MSDOS_COMPILER 2152 clear_eol(); 2153 #else 2154 if (below_mem) 2155 tputs(sc_eos_clear, 1, putchr); 2156 else 2157 tputs(sc_eol_clear, 1, putchr); 2158 #endif 2159 } 2160 2161 /* 2162 * Clear the bottom line of the display. 2163 * Leave the cursor at the beginning of the bottom line. 2164 */ 2165 public void 2166 clear_bot() 2167 { 2168 /* 2169 * If we're in a non-normal attribute mode, temporarily exit 2170 * the mode while we do the clear. Some terminals fill the 2171 * cleared area with the current attribute. 2172 */ 2173 if (oldbot) 2174 lower_left(); 2175 else 2176 line_left(); 2177 2178 if (attrmode == AT_NORMAL) 2179 clear_eol_bot(); 2180 else 2181 { 2182 int saved_attrmode = attrmode; 2183 2184 at_exit(); 2185 clear_eol_bot(); 2186 at_enter(saved_attrmode); 2187 } 2188 } 2189 2190 public void 2191 at_enter(attr) 2192 int attr; 2193 { 2194 attr = apply_at_specials(attr); 2195 2196 #if !MSDOS_COMPILER 2197 /* The one with the most priority is last. */ 2198 if (attr & AT_UNDERLINE) 2199 tputs(sc_u_in, 1, putchr); 2200 if (attr & AT_BOLD) 2201 tputs(sc_b_in, 1, putchr); 2202 if (attr & AT_BLINK) 2203 tputs(sc_bl_in, 1, putchr); 2204 if (attr & AT_STANDOUT) 2205 tputs(sc_s_in, 1, putchr); 2206 #else 2207 flush(); 2208 /* The one with the most priority is first. */ 2209 if (attr & AT_STANDOUT) 2210 { 2211 SETCOLORS(so_fg_color, so_bg_color); 2212 } else if (attr & AT_BLINK) 2213 { 2214 SETCOLORS(bl_fg_color, bl_bg_color); 2215 } 2216 else if (attr & AT_BOLD) 2217 { 2218 SETCOLORS(bo_fg_color, bo_bg_color); 2219 } 2220 else if (attr & AT_UNDERLINE) 2221 { 2222 SETCOLORS(ul_fg_color, ul_bg_color); 2223 } 2224 #endif 2225 2226 attrmode = attr; 2227 } 2228 2229 public void 2230 at_exit() 2231 { 2232 #if !MSDOS_COMPILER 2233 /* Undo things in the reverse order we did them. */ 2234 if (attrmode & AT_STANDOUT) 2235 tputs(sc_s_out, 1, putchr); 2236 if (attrmode & AT_BLINK) 2237 tputs(sc_bl_out, 1, putchr); 2238 if (attrmode & AT_BOLD) 2239 tputs(sc_b_out, 1, putchr); 2240 if (attrmode & AT_UNDERLINE) 2241 tputs(sc_u_out, 1, putchr); 2242 #else 2243 flush(); 2244 SETCOLORS(nm_fg_color, nm_bg_color); 2245 #endif 2246 2247 attrmode = AT_NORMAL; 2248 } 2249 2250 public void 2251 at_switch(attr) 2252 int attr; 2253 { 2254 int new_attrmode = apply_at_specials(attr); 2255 int ignore_modes = AT_ANSI; 2256 2257 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2258 { 2259 at_exit(); 2260 at_enter(attr); 2261 } 2262 } 2263 2264 public int 2265 is_at_equiv(attr1, attr2) 2266 int attr1; 2267 int attr2; 2268 { 2269 attr1 = apply_at_specials(attr1); 2270 attr2 = apply_at_specials(attr2); 2271 2272 return (attr1 == attr2); 2273 } 2274 2275 public int 2276 apply_at_specials(attr) 2277 int attr; 2278 { 2279 if (attr & AT_BINARY) 2280 attr |= binattr; 2281 if (attr & AT_HILITE) 2282 attr |= AT_STANDOUT; 2283 attr &= ~(AT_BINARY|AT_HILITE); 2284 2285 return attr; 2286 } 2287 2288 #if 0 /* No longer used */ 2289 /* 2290 * Erase the character to the left of the cursor 2291 * and move the cursor left. 2292 */ 2293 public void 2294 backspace() 2295 { 2296 #if !MSDOS_COMPILER 2297 /* 2298 * Erase the previous character by overstriking with a space. 2299 */ 2300 tputs(sc_backspace, 1, putchr); 2301 putchr(' '); 2302 tputs(sc_backspace, 1, putchr); 2303 #else 2304 #if MSDOS_COMPILER==MSOFTC 2305 struct rccoord tpos; 2306 2307 flush(); 2308 tpos = _gettextposition(); 2309 if (tpos.col <= 1) 2310 return; 2311 _settextposition(tpos.row, tpos.col-1); 2312 _outtext(" "); 2313 _settextposition(tpos.row, tpos.col-1); 2314 #else 2315 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2316 cputs("\b"); 2317 #else 2318 #if MSDOS_COMPILER==WIN32C 2319 COORD cpos; 2320 DWORD cChars; 2321 CONSOLE_SCREEN_BUFFER_INFO scr; 2322 2323 flush(); 2324 GetConsoleScreenBufferInfo(con_out, &scr); 2325 cpos = scr.dwCursorPosition; 2326 if (cpos.X <= 0) 2327 return; 2328 cpos.X--; 2329 SetConsoleCursorPosition(con_out, cpos); 2330 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2331 SetConsoleCursorPosition(con_out, cpos); 2332 #endif 2333 #endif 2334 #endif 2335 #endif 2336 } 2337 #endif /* 0 */ 2338 2339 /* 2340 * Output a plain backspace, without erasing the previous char. 2341 */ 2342 public void 2343 putbs() 2344 { 2345 #if !MSDOS_COMPILER 2346 tputs(sc_backspace, 1, putchr); 2347 #else 2348 int row, col; 2349 2350 flush(); 2351 { 2352 #if MSDOS_COMPILER==MSOFTC 2353 struct rccoord tpos; 2354 tpos = _gettextposition(); 2355 row = tpos.row; 2356 col = tpos.col; 2357 #else 2358 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2359 row = wherey(); 2360 col = wherex(); 2361 #else 2362 #if MSDOS_COMPILER==WIN32C 2363 CONSOLE_SCREEN_BUFFER_INFO scr; 2364 GetConsoleScreenBufferInfo(con_out, &scr); 2365 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2366 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2367 #endif 2368 #endif 2369 #endif 2370 } 2371 if (col <= 1) 2372 return; 2373 _settextposition(row, col-1); 2374 #endif /* MSDOS_COMPILER */ 2375 } 2376 2377 #if MSDOS_COMPILER==WIN32C 2378 /* 2379 * Determine whether an input character is waiting to be read. 2380 */ 2381 static int 2382 win32_kbhit(tty) 2383 HANDLE tty; 2384 { 2385 INPUT_RECORD ip; 2386 DWORD read; 2387 2388 if (keyCount > 0) 2389 return (TRUE); 2390 2391 currentKey.ascii = 0; 2392 currentKey.scan = 0; 2393 2394 /* 2395 * Wait for a real key-down event, but 2396 * ignore SHIFT and CONTROL key events. 2397 */ 2398 do 2399 { 2400 PeekConsoleInput(tty, &ip, 1, &read); 2401 if (read == 0) 2402 return (FALSE); 2403 ReadConsoleInput(tty, &ip, 1, &read); 2404 } while (ip.EventType != KEY_EVENT || 2405 ip.Event.KeyEvent.bKeyDown != TRUE || 2406 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2407 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2408 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2409 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2410 2411 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2412 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2413 keyCount = ip.Event.KeyEvent.wRepeatCount; 2414 2415 if (ip.Event.KeyEvent.dwControlKeyState & 2416 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2417 { 2418 switch (currentKey.scan) 2419 { 2420 case PCK_ALT_E: /* letter 'E' */ 2421 currentKey.ascii = 0; 2422 break; 2423 } 2424 } else if (ip.Event.KeyEvent.dwControlKeyState & 2425 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2426 { 2427 switch (currentKey.scan) 2428 { 2429 case PCK_RIGHT: /* right arrow */ 2430 currentKey.scan = PCK_CTL_RIGHT; 2431 break; 2432 case PCK_LEFT: /* left arrow */ 2433 currentKey.scan = PCK_CTL_LEFT; 2434 break; 2435 case PCK_DELETE: /* delete */ 2436 currentKey.scan = PCK_CTL_DELETE; 2437 break; 2438 } 2439 } 2440 return (TRUE); 2441 } 2442 2443 /* 2444 * Read a character from the keyboard. 2445 */ 2446 public char 2447 WIN32getch(tty) 2448 int tty; 2449 { 2450 int ascii; 2451 2452 if (pending_scancode) 2453 { 2454 pending_scancode = 0; 2455 return ((char)(currentKey.scan & 0x00FF)); 2456 } 2457 2458 while (win32_kbhit((HANDLE)tty) == FALSE) 2459 { 2460 Sleep(20); 2461 if (ABORT_SIGS()) 2462 return ('\003'); 2463 continue; 2464 } 2465 keyCount --; 2466 ascii = currentKey.ascii; 2467 /* 2468 * On PC's, the extended keys return a 2 byte sequence beginning 2469 * with '00', so if the ascii code is 00, the next byte will be 2470 * the lsb of the scan code. 2471 */ 2472 pending_scancode = (ascii == 0x00); 2473 return ((char)ascii); 2474 } 2475 #endif 2476 2477 #if MSDOS_COMPILER 2478 /* 2479 */ 2480 public void 2481 WIN32setcolors(fg, bg) 2482 int fg; 2483 int bg; 2484 { 2485 SETCOLORS(fg, bg); 2486 } 2487 2488 /* 2489 */ 2490 public void 2491 WIN32textout(text, len) 2492 char *text; 2493 int len; 2494 { 2495 #if MSDOS_COMPILER==WIN32C 2496 DWORD written; 2497 WriteConsole(con_out, text, len, &written, NULL); 2498 #else 2499 char c = text[len]; 2500 text[len] = '\0'; 2501 cputs(text); 2502 text[len] = c; 2503 #endif 2504 } 2505 #endif 2506