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#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 108char *getenv(); 109off_t lseek(); 110VOID_POINTER calloc(); 111void 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 */ 220typedef unsigned long LWCHAR; 221typedef off_t POSITION; 222typedef 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 */ 292struct scrpos 293{ 294 POSITION pos; 295 int ln; 296}; 297 298typedef union parg 299{ 300 char *p_string; 301 int p_int; 302 LINENUM p_linenum; 303} PARG; 304 305#define NULL_PARG ((PARG *)NULL) 306 307struct textlist 308{ 309 char *string; 310 char *endstring; 311}; 312 313#define EOI (-1) 314 315#define READ_INTR (-2) 316 317/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */ 318#define NUM_FRAC_DENOM 1000000 319#define NUM_LOG_FRAC_DENOM 6 320 321/* How quiet should we be? */ 322#define NOT_QUIET 0 /* Ring bell at eof and for errors */ 323#define LITTLE_QUIET 1 /* Ring bell only for errors */ 324#define VERY_QUIET 2 /* Never ring bell */ 325 326/* How should we prompt? */ 327#define PR_SHORT 0 /* Prompt with colon */ 328#define PR_MEDIUM 1 /* Prompt with message */ 329#define PR_LONG 2 /* Prompt with longer message */ 330 331/* How should we handle backspaces? */ 332#define BS_SPECIAL 0 /* Do special things for underlining and bold */ 333#define BS_NORMAL 1 /* \b treated as normal char; actually output */ 334#define BS_CONTROL 2 /* \b treated as control char; prints as ^H */ 335 336/* How should we search? */ 337#define SRCH_FORW (1 << 0) /* Search forward from current position */ 338#define SRCH_BACK (1 << 1) /* Search backward from current position */ 339#define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */ 340#define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */ 341#define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */ 342#define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */ 343#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */ 344#define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */ 345#define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */ 346#define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */ 347 348#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \ 349 (((t) & ~SRCH_FORW) | SRCH_BACK) : \ 350 (((t) & ~SRCH_BACK) | SRCH_FORW)) 351 352/* */ 353#define NO_MCA 0 354#define MCA_DONE 1 355#define MCA_MORE 2 356 357#define CC_OK 0 /* Char was accepted & processed */ 358#define CC_QUIT 1 /* Char was a request to abort current cmd */ 359#define CC_ERROR 2 /* Char could not be accepted due to error */ 360#define CC_PASS 3 /* Char was rejected (internal) */ 361 362#define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */ 363 364/* Special char bit-flags used to tell put_line() to do something special */ 365#define AT_NORMAL (0) 366#define AT_UNDERLINE (1 << 0) 367#define AT_BOLD (1 << 1) 368#define AT_BLINK (1 << 2) 369#define AT_STANDOUT (1 << 3) 370#define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */ 371#define AT_BINARY (1 << 5) /* LESS*BINFMT representation */ 372#define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */ 373 374#if '0' == 240 375#define IS_EBCDIC_HOST 1 376#endif 377 378#if IS_EBCDIC_HOST 379/* 380 * Long definition for EBCDIC. 381 * Since the argument is usually a constant, this macro normally compiles 382 * into a constant. 383 */ 384#define CONTROL(c) ( \ 385 (c)=='[' ? '\047' : \ 386 (c)=='a' ? '\001' : \ 387 (c)=='b' ? '\002' : \ 388 (c)=='c' ? '\003' : \ 389 (c)=='d' ? '\067' : \ 390 (c)=='e' ? '\055' : \ 391 (c)=='f' ? '\056' : \ 392 (c)=='g' ? '\057' : \ 393 (c)=='h' ? '\026' : \ 394 (c)=='i' ? '\005' : \ 395 (c)=='j' ? '\025' : \ 396 (c)=='k' ? '\013' : \ 397 (c)=='l' ? '\014' : \ 398 (c)=='m' ? '\015' : \ 399 (c)=='n' ? '\016' : \ 400 (c)=='o' ? '\017' : \ 401 (c)=='p' ? '\020' : \ 402 (c)=='q' ? '\021' : \ 403 (c)=='r' ? '\022' : \ 404 (c)=='s' ? '\023' : \ 405 (c)=='t' ? '\074' : \ 406 (c)=='u' ? '\075' : \ 407 (c)=='v' ? '\062' : \ 408 (c)=='w' ? '\046' : \ 409 (c)=='x' ? '\030' : \ 410 (c)=='y' ? '\031' : \ 411 (c)=='z' ? '\077' : \ 412 (c)=='A' ? '\001' : \ 413 (c)=='B' ? '\002' : \ 414 (c)=='C' ? '\003' : \ 415 (c)=='D' ? '\067' : \ 416 (c)=='E' ? '\055' : \ 417 (c)=='F' ? '\056' : \ 418 (c)=='G' ? '\057' : \ 419 (c)=='H' ? '\026' : \ 420 (c)=='I' ? '\005' : \ 421 (c)=='J' ? '\025' : \ 422 (c)=='K' ? '\013' : \ 423 (c)=='L' ? '\014' : \ 424 (c)=='M' ? '\015' : \ 425 (c)=='N' ? '\016' : \ 426 (c)=='O' ? '\017' : \ 427 (c)=='P' ? '\020' : \ 428 (c)=='Q' ? '\021' : \ 429 (c)=='R' ? '\022' : \ 430 (c)=='S' ? '\023' : \ 431 (c)=='T' ? '\074' : \ 432 (c)=='U' ? '\075' : \ 433 (c)=='V' ? '\062' : \ 434 (c)=='W' ? '\046' : \ 435 (c)=='X' ? '\030' : \ 436 (c)=='Y' ? '\031' : \ 437 (c)=='Z' ? '\077' : \ 438 (c)=='|' ? '\031' : \ 439 (c)=='\\' ? '\034' : \ 440 (c)=='^' ? '\036' : \ 441 (c)&077) 442#else 443#define CONTROL(c) ((c)&037) 444#endif /* IS_EBCDIC_HOST */ 445 446#define ESC CONTROL('[') 447#define CSI ((unsigned char)'\233') 448 449#if _OSK_MWC32 450#define LSIGNAL(sig,func) os9_signal(sig,func) 451#else 452#define LSIGNAL(sig,func) signal(sig,func) 453#endif 454 455#if HAVE_SIGPROCMASK 456#if HAVE_SIGSET_T 457#else 458#undef HAVE_SIGPROCMASK 459#endif 460#endif 461#if HAVE_SIGPROCMASK 462#if HAVE_SIGEMPTYSET 463#else 464#undef sigemptyset 465#define sigemptyset(mp) *(mp) = 0 466#endif 467#endif 468 469#define S_INTERRUPT 01 470#define S_STOP 02 471#define S_WINCH 04 472#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP)) 473 474#define QUIT_OK 0 475#define QUIT_ERROR 1 476#define QUIT_INTERRUPT 2 477#define QUIT_SAVED_STATUS (-1) 478 479#define FOLLOW_DESC 0 480#define FOLLOW_NAME 1 481 482/* filestate flags */ 483#define CH_CANSEEK 001 484#define CH_KEEPOPEN 002 485#define CH_POPENED 004 486#define CH_HELPFILE 010 487#define CH_NODATA 020 /* Special case for zero length files */ 488 489 490#define ch_zero() ((POSITION)0) 491 492#define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@" 493#define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@" 494 495/* Flags for cvt_text */ 496#define CVT_TO_LC 01 /* Convert upper-case to lower-case */ 497#define CVT_BS 02 /* Do backspace processing */ 498#define CVT_CRLF 04 /* Remove CR after LF */ 499#define CVT_ANSI 010 /* Remove ANSI escape sequences */ 500 501#include "funcs.h" 502 503/* Functions not included in funcs.h */ 504void postoa(); 505void linenumtoa(); 506void inttoa(); 507