1 /* 2 * Copyright (C) 1984-2023 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 #define NEWBOT 1 11 12 /* 13 * Standard include file for "less". 14 */ 15 16 /* 17 * Defines for MSDOS_COMPILER. 18 */ 19 #define MSOFTC 1 /* Microsoft C */ 20 #define BORLANDC 2 /* Borland C */ 21 #define WIN32C 3 /* Windows (Borland C or Microsoft C) */ 22 #define DJGPPC 4 /* DJGPP C */ 23 24 /* 25 * Include the file of compile-time options. 26 * The <> make cc search for it in -I., not srcdir. 27 */ 28 #include <defines.h> 29 30 #ifdef _SEQUENT_ 31 /* 32 * Kludge for Sequent Dynix systems that have sigsetmask, but 33 * it's not compatible with the way less calls it. 34 * {{ Do other systems need this? }} 35 */ 36 #undef HAVE_SIGSETMASK 37 #endif 38 39 /* 40 * Language details. 41 */ 42 #if HAVE_CONST 43 #define constant const 44 #else 45 #define constant 46 #endif 47 48 #define public /* PUBLIC FUNCTION */ 49 50 /* Library function declarations */ 51 52 #if HAVE_SYS_TYPES_H 53 #include <sys/types.h> 54 #endif 55 #if HAVE_STDIO_H 56 #include <stdio.h> 57 #endif 58 #if HAVE_FCNTL_H 59 #include <fcntl.h> 60 #endif 61 #if HAVE_UNISTD_H 62 #include <unistd.h> 63 #endif 64 #if HAVE_CTYPE_H 65 #include <ctype.h> 66 #endif 67 #if HAVE_WCTYPE_H 68 #include <wctype.h> 69 #endif 70 #if HAVE_LIMITS_H 71 #include <limits.h> 72 #endif 73 #if HAVE_STDINT_H 74 #include <stdint.h> 75 #endif 76 #if HAVE_STDLIB_H 77 #include <stdlib.h> 78 #endif 79 #if HAVE_STRING_H 80 #include <string.h> 81 #endif 82 83 #if HAVE_STDCKDINT_H 84 #include <stdckdint.h> 85 #else 86 /* 87 * These substitutes for C23 stdckdint macros do not set *R on overflow, 88 * and they assume A and B are nonnegative. That is good enough for us. 89 */ 90 #define ckd_add(r, a, b) help_ckd_add(r, a, b, sizeof *(r), signed_expr(*(r))) 91 #define ckd_mul(r, a, b) help_ckd_mul(r, a, b, sizeof *(r), signed_expr(*(r))) 92 /* True if the integer expression E, after promotion, is signed. */ 93 #define signed_expr(e) ((TRUE ? 0 : e) - 1 < 0) 94 #endif 95 96 #if defined UINTMAX_MAX 97 typedef uintmax_t uintmax; 98 #elif defined ULLONG_MAX 99 typedef unsigned long long uintmax; 100 #else 101 typedef unsigned long uintmax; 102 #endif 103 104 /* OS-specific includes */ 105 #ifdef _OSK 106 #include <modes.h> 107 #include <strings.h> 108 #endif 109 110 #ifdef __TANDEM 111 #include <floss.h> 112 #endif 113 114 #if MSDOS_COMPILER==WIN32C || OS2 115 #include <io.h> 116 #endif 117 118 #if MSDOS_COMPILER==DJGPPC 119 #include <io.h> 120 #include <sys/exceptn.h> 121 #include <conio.h> 122 #include <pc.h> 123 #endif 124 125 #if !HAVE_STDLIB_H 126 char *getenv(); 127 off_t lseek(); 128 void *calloc(); 129 void free(); 130 #endif 131 132 /* 133 * Simple lowercase test which can be used during option processing 134 * (before options are parsed which might tell us what charset to use). 135 */ 136 #define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z') 137 #define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z') 138 #define ASCII_TO_UPPER(c) ((c) - 'a' + 'A') 139 #define ASCII_TO_LOWER(c) ((c) - 'A' + 'a') 140 141 #undef IS_UPPER 142 #undef IS_LOWER 143 #undef TO_UPPER 144 #undef TO_LOWER 145 #undef IS_SPACE 146 #undef IS_DIGIT 147 148 #if HAVE_WCTYPE 149 #define IS_UPPER(c) iswupper(c) 150 #define IS_LOWER(c) iswlower(c) 151 #define TO_UPPER(c) towupper(c) 152 #define TO_LOWER(c) towlower(c) 153 #else 154 #if HAVE_UPPER_LOWER 155 #define IS_UPPER(c) isupper((unsigned char) (c)) 156 #define IS_LOWER(c) islower((unsigned char) (c)) 157 #define TO_UPPER(c) toupper((unsigned char) (c)) 158 #define TO_LOWER(c) tolower((unsigned char) (c)) 159 #else 160 #define IS_UPPER(c) ASCII_IS_UPPER(c) 161 #define IS_LOWER(c) ASCII_IS_LOWER(c) 162 #define TO_UPPER(c) ASCII_TO_UPPER(c) 163 #define TO_LOWER(c) ASCII_TO_LOWER(c) 164 #endif 165 #endif 166 167 #ifdef isspace 168 #define IS_SPACE(c) isspace((unsigned char)(c)) 169 #else 170 #define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f') 171 #endif 172 173 #ifdef isdigit 174 #define IS_DIGIT(c) isdigit((unsigned char)(c)) 175 #else 176 #define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') 177 #endif 178 179 #define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI)) 180 181 #ifndef NULL 182 #define NULL 0 183 #endif 184 185 #ifndef TRUE 186 #define TRUE 1 187 #endif 188 #ifndef FALSE 189 #define FALSE 0 190 #endif 191 192 #define OPT_OFF 0 193 #define OPT_ON 1 194 #define OPT_ONPLUS 2 195 196 #if !HAVE_MEMCPY 197 #ifndef memcpy 198 #define memcpy(to,from,len) bcopy((from),(to),(len)) 199 #endif 200 #endif 201 202 #if HAVE_SNPRINTF 203 #define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1)) 204 #define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2)) 205 #define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3)) 206 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4)) 207 #else 208 /* Use unsafe sprintf if we don't have snprintf. */ 209 #define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1)) 210 #define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2)) 211 #define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3)) 212 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4)) 213 #endif 214 215 #define BAD_LSEEK ((off_t)-1) 216 217 #ifndef SEEK_SET 218 #define SEEK_SET 0 219 #endif 220 #ifndef SEEK_END 221 #define SEEK_END 2 222 #endif 223 224 #ifndef CHAR_BIT 225 #define CHAR_BIT 8 226 #endif 227 228 /* 229 * Upper bound on the string length of an integer converted to string. 230 * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit; 231 * add 1 for integer division truncation; add 1 more for a minus sign. 232 */ 233 #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1) 234 235 /* 236 * Special types and constants. 237 */ 238 typedef unsigned long LWCHAR; 239 typedef off_t POSITION; 240 typedef off_t LINENUM; 241 #define MIN_LINENUM_WIDTH 7 /* Default min printing width of a line number */ 242 #define MAX_LINENUM_WIDTH 16 /* Max width of a line number */ 243 #define MAX_STATUSCOL_WIDTH 4 /* Max width of the status column */ 244 #define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */ 245 #define MAX_PRCHAR_LEN 31 /* Max chars in prchar() result */ 246 247 #define NULL_POSITION ((POSITION)(-1)) 248 249 /* 250 * Flags for open() 251 */ 252 #if MSDOS_COMPILER || OS2 253 #define OPEN_READ (O_RDONLY|O_BINARY) 254 #else 255 #ifdef _OSK 256 #define OPEN_READ (S_IREAD) 257 #else 258 #ifdef O_RDONLY 259 #define OPEN_READ (O_RDONLY) 260 #else 261 #define OPEN_READ (0) 262 #endif 263 #endif 264 #endif 265 266 #if defined(O_WRONLY) && defined(O_APPEND) 267 #define OPEN_APPEND (O_APPEND|O_WRONLY) 268 #else 269 #ifdef _OSK 270 #define OPEN_APPEND (S_IWRITE) 271 #else 272 #define OPEN_APPEND (1) 273 #endif 274 #endif 275 276 /* 277 * Flags for creat() 278 */ 279 #if MSDOS_COMPILER 280 #define CREAT_RW (S_IREAD|S_IWRITE) 281 #else 282 #define CREAT_RW 0644 283 #endif 284 285 /* 286 * Set a file descriptor to binary mode. 287 */ 288 #if MSDOS_COMPILER==MSOFTC 289 #define SET_BINARY(f) _setmode(f, _O_BINARY); 290 #else 291 #if MSDOS_COMPILER || OS2 292 #define SET_BINARY(f) setmode(f, O_BINARY) 293 #else 294 #define SET_BINARY(f) 295 #endif 296 #endif 297 298 /* 299 * Does the shell treat "?" as a metacharacter? 300 */ 301 #if MSDOS_COMPILER || OS2 || _OSK 302 #define SHELL_META_QUEST 0 303 #else 304 #define SHELL_META_QUEST 1 305 #endif 306 307 #define SPACES_IN_FILENAMES 1 308 309 /* 310 * An IFILE represents an input file. 311 */ 312 #define IFILE void* 313 #define NULL_IFILE ((IFILE)NULL) 314 315 /* 316 * The structure used to represent a "screen position". 317 * This consists of a file position, and a screen line number. 318 * The meaning is that the line starting at the given file 319 * position is displayed on the ln-th line of the screen. 320 * (Screen lines before ln are empty.) 321 */ 322 struct scrpos 323 { 324 POSITION pos; 325 int ln; 326 }; 327 328 typedef union parg 329 { 330 char *p_string; 331 int p_int; 332 LINENUM p_linenum; 333 char p_char; 334 } PARG; 335 336 #define NULL_PARG ((PARG *)NULL) 337 338 struct textlist 339 { 340 char *string; 341 char *endstring; 342 }; 343 344 struct wchar_range 345 { 346 LWCHAR first, last; 347 }; 348 349 struct wchar_range_table 350 { 351 struct wchar_range *table; 352 int count; 353 }; 354 355 #if HAVE_POLL 356 typedef short POLL_EVENTS; 357 #endif 358 359 #define EOI (-1) 360 361 #define READ_ERR (-1) 362 #define READ_INTR (-2) 363 #define READ_AGAIN (-3) 364 365 /* 366 * A fraction is represented by a long n; the fraction is n/NUM_FRAC_DENOM. 367 * To avoid overflow problems, 0 <= n < NUM_FRAC_DENUM <= LONG_MAX/100. 368 */ 369 #define NUM_FRAC_DENOM 1000000 370 #define NUM_LOG_FRAC_DENOM 6 371 372 /* How quiet should we be? */ 373 #define NOT_QUIET 0 /* Ring bell at eof and for errors */ 374 #define LITTLE_QUIET 1 /* Ring bell only for errors */ 375 #define VERY_QUIET 2 /* Never ring bell */ 376 377 /* How should we prompt? */ 378 #define PR_SHORT 0 /* Prompt with colon */ 379 #define PR_MEDIUM 1 /* Prompt with message */ 380 #define PR_LONG 2 /* Prompt with longer message */ 381 382 /* How should we handle backspaces? */ 383 #define BS_SPECIAL 0 /* Do special things for underlining and bold */ 384 #define BS_NORMAL 1 /* \b treated as normal char; actually output */ 385 #define BS_CONTROL 2 /* \b treated as control char; prints as ^H */ 386 387 /* How should we search? */ 388 #define SRCH_FORW (1 << 0) /* Search forward from current position */ 389 #define SRCH_BACK (1 << 1) /* Search backward from current position */ 390 #define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */ 391 #define SRCH_INCR (1 << 3) /* Incremental search */ 392 #define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */ 393 #define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */ 394 #define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */ 395 #define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */ 396 #define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */ 397 #define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */ 398 #define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */ 399 #define SRCH_WRAP (1 << 15) /* Wrap-around search (continue at BOF/EOF) */ 400 #define SRCH_SUBSEARCH(i) (1 << (16+(i))) /* Search for subpattern */ 401 /* {{ Depends on NUM_SEARCH_COLORS==5 }} */ 402 #define SRCH_SUBSEARCH_ALL (SRCH_SUBSEARCH(1)|SRCH_SUBSEARCH(2)|SRCH_SUBSEARCH(3)|SRCH_SUBSEARCH(4)|SRCH_SUBSEARCH(5)) 403 404 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \ 405 (((t) & ~SRCH_FORW) | SRCH_BACK) : \ 406 (((t) & ~SRCH_BACK) | SRCH_FORW)) 407 408 /* */ 409 #define NO_MCA 0 410 #define MCA_DONE 1 411 #define MCA_MORE 2 412 413 #define CC_OK 0 /* Char was accepted & processed */ 414 #define CC_QUIT 1 /* Char was a request to abort current cmd */ 415 #define CC_ERROR 2 /* Char could not be accepted due to error */ 416 #define CC_PASS 3 /* Char was rejected (internal) */ 417 418 #define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */ 419 420 /* Special char bit-flags used to tell put_line() to do something special */ 421 #define AT_NORMAL (0) 422 #define AT_UNDERLINE (1 << 0) 423 #define AT_BOLD (1 << 1) 424 #define AT_BLINK (1 << 2) 425 #define AT_STANDOUT (1 << 3) 426 #define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */ 427 #define AT_BINARY (1 << 5) /* LESS*BINFMT representation */ 428 #define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */ 429 430 #define AT_COLOR_SHIFT 8 431 #define AT_NUM_COLORS 16 432 #define AT_COLOR ((AT_NUM_COLORS-1) << AT_COLOR_SHIFT) 433 #define AT_COLOR_ATTN (1 << AT_COLOR_SHIFT) 434 #define AT_COLOR_BIN (2 << AT_COLOR_SHIFT) 435 #define AT_COLOR_CTRL (3 << AT_COLOR_SHIFT) 436 #define AT_COLOR_ERROR (4 << AT_COLOR_SHIFT) 437 #define AT_COLOR_LINENUM (5 << AT_COLOR_SHIFT) 438 #define AT_COLOR_MARK (6 << AT_COLOR_SHIFT) 439 #define AT_COLOR_PROMPT (7 << AT_COLOR_SHIFT) 440 #define AT_COLOR_RSCROLL (8 << AT_COLOR_SHIFT) 441 #define AT_COLOR_HEADER (9 << AT_COLOR_SHIFT) 442 #define AT_COLOR_SEARCH (10 << AT_COLOR_SHIFT) 443 #define AT_COLOR_SUBSEARCH(i) ((10+(i)) << AT_COLOR_SHIFT) 444 #define NUM_SEARCH_COLORS (AT_NUM_COLORS-10-1) 445 446 typedef enum { CT_NULL, CT_4BIT, CT_6BIT } COLOR_TYPE; 447 448 typedef enum { 449 CV_BLUE = 1, 450 CV_GREEN = 2, 451 CV_RED = 4, 452 CV_BRIGHT = 8, 453 CV_NOCHANGE = -2, 454 CV_ERROR = -1 455 } COLOR_VALUE; 456 457 /* ANSI states */ 458 #define ANSI_MID 1 459 #define ANSI_ERR 2 460 #define ANSI_END 3 461 462 #if '0' == 240 463 #define IS_EBCDIC_HOST 1 464 #endif 465 466 #if IS_EBCDIC_HOST 467 /* 468 * Long definition for EBCDIC. 469 * Since the argument is usually a constant, this macro normally compiles 470 * into a constant. 471 */ 472 #define CONTROL(c) ( \ 473 (c)=='[' ? '\047' : \ 474 (c)=='a' ? '\001' : \ 475 (c)=='b' ? '\002' : \ 476 (c)=='c' ? '\003' : \ 477 (c)=='d' ? '\067' : \ 478 (c)=='e' ? '\055' : \ 479 (c)=='f' ? '\056' : \ 480 (c)=='g' ? '\057' : \ 481 (c)=='h' ? '\026' : \ 482 (c)=='i' ? '\005' : \ 483 (c)=='j' ? '\025' : \ 484 (c)=='k' ? '\013' : \ 485 (c)=='l' ? '\014' : \ 486 (c)=='m' ? '\015' : \ 487 (c)=='n' ? '\016' : \ 488 (c)=='o' ? '\017' : \ 489 (c)=='p' ? '\020' : \ 490 (c)=='q' ? '\021' : \ 491 (c)=='r' ? '\022' : \ 492 (c)=='s' ? '\023' : \ 493 (c)=='t' ? '\074' : \ 494 (c)=='u' ? '\075' : \ 495 (c)=='v' ? '\062' : \ 496 (c)=='w' ? '\046' : \ 497 (c)=='x' ? '\030' : \ 498 (c)=='y' ? '\031' : \ 499 (c)=='z' ? '\077' : \ 500 (c)=='A' ? '\001' : \ 501 (c)=='B' ? '\002' : \ 502 (c)=='C' ? '\003' : \ 503 (c)=='D' ? '\067' : \ 504 (c)=='E' ? '\055' : \ 505 (c)=='F' ? '\056' : \ 506 (c)=='G' ? '\057' : \ 507 (c)=='H' ? '\026' : \ 508 (c)=='I' ? '\005' : \ 509 (c)=='J' ? '\025' : \ 510 (c)=='K' ? '\013' : \ 511 (c)=='L' ? '\014' : \ 512 (c)=='M' ? '\015' : \ 513 (c)=='N' ? '\016' : \ 514 (c)=='O' ? '\017' : \ 515 (c)=='P' ? '\020' : \ 516 (c)=='Q' ? '\021' : \ 517 (c)=='R' ? '\022' : \ 518 (c)=='S' ? '\023' : \ 519 (c)=='T' ? '\074' : \ 520 (c)=='U' ? '\075' : \ 521 (c)=='V' ? '\062' : \ 522 (c)=='W' ? '\046' : \ 523 (c)=='X' ? '\030' : \ 524 (c)=='Y' ? '\031' : \ 525 (c)=='Z' ? '\077' : \ 526 (c)=='|' ? '\031' : \ 527 (c)=='\\' ? '\034' : \ 528 (c)=='^' ? '\036' : \ 529 (c)&077) 530 #else 531 #define CONTROL(c) ((c)&037) 532 #endif /* IS_EBCDIC_HOST */ 533 534 #define ESC CONTROL('[') 535 #define ESCS "\33" 536 #define CSI ((unsigned char)'\233') 537 #define CHAR_END_COMMAND 0x40000000 538 539 #if _OSK_MWC32 540 #define LSIGNAL(sig,func) os9_signal(sig,func) 541 #else 542 #define LSIGNAL(sig,func) signal(sig,func) 543 #endif 544 545 #if HAVE_SIGPROCMASK 546 #if HAVE_SIGSET_T 547 #else 548 #undef HAVE_SIGPROCMASK 549 #endif 550 #endif 551 #if HAVE_SIGPROCMASK 552 #if HAVE_SIGEMPTYSET 553 #else 554 #undef sigemptyset 555 #define sigemptyset(mp) *(mp) = 0 556 #endif 557 #endif 558 559 #define S_INTERRUPT 01 560 #define S_STOP 02 561 #define S_WINCH 04 562 #define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP)) 563 564 #ifdef EXIT_SUCCESS 565 #define QUIT_OK EXIT_SUCCESS 566 #else 567 #define QUIT_OK 0 568 #endif 569 #ifdef EXIT_FAILURE 570 #define QUIT_ERROR EXIT_FAILURE 571 #define QUIT_INTERRUPT (EXIT_FAILURE+1) 572 #else 573 #define QUIT_ERROR 1 574 #define QUIT_INTERRUPT 2 575 #endif 576 #define QUIT_SAVED_STATUS (-1) 577 578 #define FOLLOW_DESC 0 579 #define FOLLOW_NAME 1 580 581 /* filestate flags */ 582 #define CH_CANSEEK 001 583 #define CH_KEEPOPEN 002 584 #define CH_POPENED 004 585 #define CH_HELPFILE 010 586 #define CH_NODATA 020 /* Special case for zero length files */ 587 588 #define ch_zero() ((POSITION)0) 589 590 #define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@" 591 #define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@" 592 593 /* Flags for cvt_text */ 594 #define CVT_TO_LC 01 /* Convert upper-case to lower-case */ 595 #define CVT_BS 02 /* Do backspace processing */ 596 #define CVT_CRLF 04 /* Remove CR after LF */ 597 #define CVT_ANSI 010 /* Remove ANSI escape sequences */ 598 599 #if HAVE_TIME_T 600 #define time_type time_t 601 #else 602 #define time_type long 603 #endif 604 605 /* X11 mouse reporting definitions */ 606 #define X11MOUSE_BUTTON1 0 /* Left button press */ 607 #define X11MOUSE_BUTTON2 1 /* Middle button press */ 608 #define X11MOUSE_BUTTON3 2 /* Right button press */ 609 #define X11MOUSE_BUTTON_REL 3 /* Button release */ 610 #define X11MOUSE_WHEEL_UP 0x40 /* Wheel scroll up */ 611 #define X11MOUSE_WHEEL_DOWN 0x41 /* Wheel scroll down */ 612 #define X11MOUSE_OFFSET 0x20 /* Added to button & pos bytes to create a char */ 613 614 #if LESSTEST 615 #define LESS_DUMP_CHAR CONTROL(']') 616 #endif 617 618 struct mlist; 619 struct loption; 620 struct hilite_tree; 621 struct ansi_state; 622 #include "pattern.h" 623 #include "xbuf.h" 624 #include "funcs.h" 625 626 /* Functions not included in funcs.h */ 627 void postoa(POSITION, char*, int); 628 void linenumtoa(LINENUM, char*, int); 629 void inttoa(int, char*, int); 630 int lstrtoi(char*, char**, int); 631 POSITION lstrtopos(char*, char**, int); 632 unsigned long lstrtoul(char*, char**, int); 633 #if MSDOS_COMPILER==WIN32C 634 int pclose(FILE*); 635 #endif 636