1 /* 2 * Copyright (C) 1984-2015 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_VOID 43 #define VOID_POINTER void * 44 #else 45 #define VOID_POINTER char * 46 #define void int 47 #endif 48 #if HAVE_CONST 49 #define constant const 50 #else 51 #define constant 52 #endif 53 54 #define public /* PUBLIC FUNCTION */ 55 56 /* Library function declarations */ 57 58 #if HAVE_SYS_TYPES_H 59 #include <sys/types.h> 60 #endif 61 #if HAVE_STDIO_H 62 #include <stdio.h> 63 #endif 64 #if HAVE_FCNTL_H 65 #include <fcntl.h> 66 #endif 67 #if HAVE_UNISTD_H 68 #include <unistd.h> 69 #endif 70 #if HAVE_CTYPE_H 71 #include <ctype.h> 72 #endif 73 #if HAVE_WCTYPE_H 74 #include <wctype.h> 75 #endif 76 #if HAVE_LIMITS_H 77 #include <limits.h> 78 #endif 79 #if HAVE_STDLIB_H 80 #include <stdlib.h> 81 #endif 82 #if HAVE_STRING_H 83 #include <string.h> 84 #endif 85 86 /* OS-specific includes */ 87 #ifdef _OSK 88 #include <modes.h> 89 #include <strings.h> 90 #endif 91 92 #ifdef __TANDEM 93 #include <floss.h> 94 #endif 95 96 #if MSDOS_COMPILER==WIN32C || OS2 97 #include <io.h> 98 #endif 99 100 #if MSDOS_COMPILER==DJGPPC 101 #include <io.h> 102 #include <sys/exceptn.h> 103 #include <conio.h> 104 #include <pc.h> 105 #endif 106 107 #if !HAVE_STDLIB_H 108 char *getenv(); 109 off_t lseek(); 110 VOID_POINTER calloc(); 111 void free(); 112 #endif 113 114 /* 115 * Simple lowercase test which can be used during option processing 116 * (before options are parsed which might tell us what charset to use). 117 */ 118 #define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z') 119 #define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z') 120 #define ASCII_TO_UPPER(c) ((c) - 'a' + 'A') 121 #define ASCII_TO_LOWER(c) ((c) - 'A' + 'a') 122 123 #undef IS_UPPER 124 #undef IS_LOWER 125 #undef TO_UPPER 126 #undef TO_LOWER 127 #undef IS_SPACE 128 #undef IS_DIGIT 129 130 #if HAVE_WCTYPE 131 #define IS_UPPER(c) iswupper(c) 132 #define IS_LOWER(c) iswlower(c) 133 #define TO_UPPER(c) towupper(c) 134 #define TO_LOWER(c) towlower(c) 135 #else 136 #if HAVE_UPPER_LOWER 137 #define IS_UPPER(c) isupper((unsigned char) (c)) 138 #define IS_LOWER(c) islower((unsigned char) (c)) 139 #define TO_UPPER(c) toupper((unsigned char) (c)) 140 #define TO_LOWER(c) tolower((unsigned char) (c)) 141 #else 142 #define IS_UPPER(c) ASCII_IS_UPPER(c) 143 #define IS_LOWER(c) ASCII_IS_LOWER(c) 144 #define TO_UPPER(c) ASCII_TO_UPPER(c) 145 #define TO_LOWER(c) ASCII_TO_LOWER(c) 146 #endif 147 #endif 148 149 #ifdef isspace 150 #define IS_SPACE(c) isspace((unsigned char)(c)) 151 #else 152 #define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f') 153 #endif 154 155 #ifdef isdigit 156 #define IS_DIGIT(c) isdigit((unsigned char)(c)) 157 #else 158 #define IS_DIGIT(c) ((c) >= '0' && (c) <= '9') 159 #endif 160 161 #define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI)) 162 163 #ifndef NULL 164 #define NULL 0 165 #endif 166 167 #ifndef TRUE 168 #define TRUE 1 169 #endif 170 #ifndef FALSE 171 #define FALSE 0 172 #endif 173 174 #define OPT_OFF 0 175 #define OPT_ON 1 176 #define OPT_ONPLUS 2 177 178 #if !HAVE_MEMCPY 179 #ifndef memcpy 180 #define memcpy(to,from,len) bcopy((from),(to),(len)) 181 #endif 182 #endif 183 184 #if HAVE_SNPRINTF 185 #define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1)) 186 #define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2)) 187 #define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3)) 188 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4)) 189 #else 190 /* Use unsafe sprintf if we don't have snprintf. */ 191 #define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1)) 192 #define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2)) 193 #define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3)) 194 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4)) 195 #endif 196 197 #define BAD_LSEEK ((off_t)-1) 198 199 #ifndef SEEK_SET 200 #define SEEK_SET 0 201 #endif 202 #ifndef SEEK_END 203 #define SEEK_END 2 204 #endif 205 206 #ifndef CHAR_BIT 207 #define CHAR_BIT 8 208 #endif 209 210 /* 211 * Upper bound on the string length of an integer converted to string. 212 * 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit; 213 * add 1 for integer division truncation; add 1 more for a minus sign. 214 */ 215 #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1) 216 217 /* 218 * Special types and constants. 219 */ 220 typedef unsigned long LWCHAR; 221 typedef off_t POSITION; 222 typedef off_t LINENUM; 223 #define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */ 224 #define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */ 225 226 #define NULL_POSITION ((POSITION)(-1)) 227 228 /* 229 * Flags for open() 230 */ 231 #if MSDOS_COMPILER || OS2 232 #define OPEN_READ (O_RDONLY|O_BINARY) 233 #else 234 #ifdef _OSK 235 #define OPEN_READ (S_IREAD) 236 #else 237 #ifdef O_RDONLY 238 #define OPEN_READ (O_RDONLY) 239 #else 240 #define OPEN_READ (0) 241 #endif 242 #endif 243 #endif 244 245 #if defined(O_WRONLY) && defined(O_APPEND) 246 #define OPEN_APPEND (O_APPEND|O_WRONLY) 247 #else 248 #ifdef _OSK 249 #define OPEN_APPEND (S_IWRITE) 250 #else 251 #define OPEN_APPEND (1) 252 #endif 253 #endif 254 255 /* 256 * Set a file descriptor to binary mode. 257 */ 258 #if MSDOS_COMPILER==MSOFTC 259 #define SET_BINARY(f) _setmode(f, _O_BINARY); 260 #else 261 #if MSDOS_COMPILER || OS2 262 #define SET_BINARY(f) setmode(f, O_BINARY) 263 #else 264 #define SET_BINARY(f) 265 #endif 266 #endif 267 268 /* 269 * Does the shell treat "?" as a metacharacter? 270 */ 271 #if MSDOS_COMPILER || OS2 || _OSK 272 #define SHELL_META_QUEST 0 273 #else 274 #define SHELL_META_QUEST 1 275 #endif 276 277 #define SPACES_IN_FILENAMES 1 278 279 /* 280 * An IFILE represents an input file. 281 */ 282 #define IFILE VOID_POINTER 283 #define NULL_IFILE ((IFILE)NULL) 284 285 /* 286 * The structure used to represent a "screen position". 287 * This consists of a file position, and a screen line number. 288 * The meaning is that the line starting at the given file 289 * position is displayed on the ln-th line of the screen. 290 * (Screen lines before ln are empty.) 291 */ 292 struct scrpos 293 { 294 POSITION pos; 295 int ln; 296 }; 297 298 /* 299 * A mark is an ifile (input file) plus a position within the file. 300 */ 301 struct mark 302 { 303 IFILE m_ifile; 304 struct scrpos m_scrpos; 305 }; 306 307 typedef union parg 308 { 309 char *p_string; 310 int p_int; 311 LINENUM p_linenum; 312 } PARG; 313 314 #define NULL_PARG ((PARG *)NULL) 315 316 struct textlist 317 { 318 char *string; 319 char *endstring; 320 }; 321 322 struct wchar_range 323 { 324 LWCHAR first, last; 325 }; 326 327 struct wchar_range_table 328 { 329 struct wchar_range *table; 330 int count; 331 }; 332 333 #define EOI (-1) 334 335 #define READ_INTR (-2) 336 337 /* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */ 338 #define NUM_FRAC_DENOM 1000000 339 #define NUM_LOG_FRAC_DENOM 6 340 341 /* How quiet should we be? */ 342 #define NOT_QUIET 0 /* Ring bell at eof and for errors */ 343 #define LITTLE_QUIET 1 /* Ring bell only for errors */ 344 #define VERY_QUIET 2 /* Never ring bell */ 345 346 /* How should we prompt? */ 347 #define PR_SHORT 0 /* Prompt with colon */ 348 #define PR_MEDIUM 1 /* Prompt with message */ 349 #define PR_LONG 2 /* Prompt with longer message */ 350 351 /* How should we handle backspaces? */ 352 #define BS_SPECIAL 0 /* Do special things for underlining and bold */ 353 #define BS_NORMAL 1 /* \b treated as normal char; actually output */ 354 #define BS_CONTROL 2 /* \b treated as control char; prints as ^H */ 355 356 /* How should we search? */ 357 #define SRCH_FORW (1 << 0) /* Search forward from current position */ 358 #define SRCH_BACK (1 << 1) /* Search backward from current position */ 359 #define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */ 360 #define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */ 361 #define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */ 362 #define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */ 363 #define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */ 364 #define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */ 365 #define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */ 366 #define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */ 367 368 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \ 369 (((t) & ~SRCH_FORW) | SRCH_BACK) : \ 370 (((t) & ~SRCH_BACK) | SRCH_FORW)) 371 372 /* */ 373 #define NO_MCA 0 374 #define MCA_DONE 1 375 #define MCA_MORE 2 376 377 #define CC_OK 0 /* Char was accepted & processed */ 378 #define CC_QUIT 1 /* Char was a request to abort current cmd */ 379 #define CC_ERROR 2 /* Char could not be accepted due to error */ 380 #define CC_PASS 3 /* Char was rejected (internal) */ 381 382 #define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */ 383 384 /* Special char bit-flags used to tell put_line() to do something special */ 385 #define AT_NORMAL (0) 386 #define AT_UNDERLINE (1 << 0) 387 #define AT_BOLD (1 << 1) 388 #define AT_BLINK (1 << 2) 389 #define AT_STANDOUT (1 << 3) 390 #define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */ 391 #define AT_BINARY (1 << 5) /* LESS*BINFMT representation */ 392 #define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */ 393 394 #if '0' == 240 395 #define IS_EBCDIC_HOST 1 396 #endif 397 398 #if IS_EBCDIC_HOST 399 /* 400 * Long definition for EBCDIC. 401 * Since the argument is usually a constant, this macro normally compiles 402 * into a constant. 403 */ 404 #define CONTROL(c) ( \ 405 (c)=='[' ? '\047' : \ 406 (c)=='a' ? '\001' : \ 407 (c)=='b' ? '\002' : \ 408 (c)=='c' ? '\003' : \ 409 (c)=='d' ? '\067' : \ 410 (c)=='e' ? '\055' : \ 411 (c)=='f' ? '\056' : \ 412 (c)=='g' ? '\057' : \ 413 (c)=='h' ? '\026' : \ 414 (c)=='i' ? '\005' : \ 415 (c)=='j' ? '\025' : \ 416 (c)=='k' ? '\013' : \ 417 (c)=='l' ? '\014' : \ 418 (c)=='m' ? '\015' : \ 419 (c)=='n' ? '\016' : \ 420 (c)=='o' ? '\017' : \ 421 (c)=='p' ? '\020' : \ 422 (c)=='q' ? '\021' : \ 423 (c)=='r' ? '\022' : \ 424 (c)=='s' ? '\023' : \ 425 (c)=='t' ? '\074' : \ 426 (c)=='u' ? '\075' : \ 427 (c)=='v' ? '\062' : \ 428 (c)=='w' ? '\046' : \ 429 (c)=='x' ? '\030' : \ 430 (c)=='y' ? '\031' : \ 431 (c)=='z' ? '\077' : \ 432 (c)=='A' ? '\001' : \ 433 (c)=='B' ? '\002' : \ 434 (c)=='C' ? '\003' : \ 435 (c)=='D' ? '\067' : \ 436 (c)=='E' ? '\055' : \ 437 (c)=='F' ? '\056' : \ 438 (c)=='G' ? '\057' : \ 439 (c)=='H' ? '\026' : \ 440 (c)=='I' ? '\005' : \ 441 (c)=='J' ? '\025' : \ 442 (c)=='K' ? '\013' : \ 443 (c)=='L' ? '\014' : \ 444 (c)=='M' ? '\015' : \ 445 (c)=='N' ? '\016' : \ 446 (c)=='O' ? '\017' : \ 447 (c)=='P' ? '\020' : \ 448 (c)=='Q' ? '\021' : \ 449 (c)=='R' ? '\022' : \ 450 (c)=='S' ? '\023' : \ 451 (c)=='T' ? '\074' : \ 452 (c)=='U' ? '\075' : \ 453 (c)=='V' ? '\062' : \ 454 (c)=='W' ? '\046' : \ 455 (c)=='X' ? '\030' : \ 456 (c)=='Y' ? '\031' : \ 457 (c)=='Z' ? '\077' : \ 458 (c)=='|' ? '\031' : \ 459 (c)=='\\' ? '\034' : \ 460 (c)=='^' ? '\036' : \ 461 (c)&077) 462 #else 463 #define CONTROL(c) ((c)&037) 464 #endif /* IS_EBCDIC_HOST */ 465 466 #define ESC CONTROL('[') 467 #define CSI ((unsigned char)'\233') 468 #define CHAR_END_COMMAND 0x40000000 469 470 #if _OSK_MWC32 471 #define LSIGNAL(sig,func) os9_signal(sig,func) 472 #else 473 #define LSIGNAL(sig,func) signal(sig,func) 474 #endif 475 476 #if HAVE_SIGPROCMASK 477 #if HAVE_SIGSET_T 478 #else 479 #undef HAVE_SIGPROCMASK 480 #endif 481 #endif 482 #if HAVE_SIGPROCMASK 483 #if HAVE_SIGEMPTYSET 484 #else 485 #undef sigemptyset 486 #define sigemptyset(mp) *(mp) = 0 487 #endif 488 #endif 489 490 #define S_INTERRUPT 01 491 #define S_STOP 02 492 #define S_WINCH 04 493 #define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP)) 494 495 #define QUIT_OK 0 496 #define QUIT_ERROR 1 497 #define QUIT_INTERRUPT 2 498 #define QUIT_SAVED_STATUS (-1) 499 500 #define FOLLOW_DESC 0 501 #define FOLLOW_NAME 1 502 503 /* filestate flags */ 504 #define CH_CANSEEK 001 505 #define CH_KEEPOPEN 002 506 #define CH_POPENED 004 507 #define CH_HELPFILE 010 508 #define CH_NODATA 020 /* Special case for zero length files */ 509 510 511 #define ch_zero() ((POSITION)0) 512 513 #define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@" 514 #define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@" 515 516 /* Flags for cvt_text */ 517 #define CVT_TO_LC 01 /* Convert upper-case to lower-case */ 518 #define CVT_BS 02 /* Do backspace processing */ 519 #define CVT_CRLF 04 /* Remove CR after LF */ 520 #define CVT_ANSI 010 /* Remove ANSI escape sequences */ 521 522 #if HAVE_TIME_T 523 #define time_type time_t 524 #else 525 #define time_type long 526 #endif 527 528 #include "funcs.h" 529 530 /* Functions not included in funcs.h */ 531 void postoa(); 532 void linenumtoa(); 533 void inttoa(); 534