contrib/less/less.h

   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();