contrib/less-4/less.h

   1 /*
   2  * Copyright (C) 1984-2007  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 about less, or for information on how to
   8  * contact the author, see the README file.
   9  */
  10
  11 #define NEWBOT 1
  12
  13 /*
  14  * Standard include file for "less".
  15  */
  16
  17 /*
  18  * Defines for MSDOS_COMPILER.
  19  */
  20 #define MSOFTC          1       /* Microsoft C */
  21 #define BORLANDC        2       /* Borland C */
  22 #define WIN32C          3       /* Windows (Borland C or Microsoft C) */
  23 #define DJGPPC          4       /* DJGPP C */
  24
  25 /*
  26  * Include the file of compile-time options.
  27  * The <> make cc search for it in -I., not srcdir.
  28  */
  29 #include <defines.h>
  30
  31 #ifdef _SEQUENT_
  32 /*
  33  * Kludge for Sequent Dynix systems that have sigsetmask, but
  34  * it's not compatible with the way less calls it.
  35  * {{ Do other systems need this? }}
  36  */
  37 #undef HAVE_SIGSETMASK
  38 #endif
  39
  40 /*
  41  * Language details.
  42  */
  43 #if HAVE_VOID
  44 #define VOID_POINTER    void *
  45 #else
  46 #define VOID_POINTER    char *
  47 #define void  int
  48 #endif
  49 #if HAVE_CONST
  50 #define constant        const
  51 #else
  52 #define constant
  53 #endif
  54
  55 #define public          /* PUBLIC FUNCTION */
  56
  57 /* Library function declarations */
  58
  59 #if HAVE_SYS_TYPES_H
  60 #include <sys/types.h>
  61 #endif
  62 #if HAVE_STDIO_H
  63 #include <stdio.h>
  64 #endif
  65 #if HAVE_FCNTL_H
  66 #include <fcntl.h>
  67 #endif
  68 #if HAVE_UNISTD_H
  69 #include <unistd.h>
  70 #endif
  71 #if HAVE_CTYPE_H
  72 #include <ctype.h>
  73 #endif
  74 #if HAVE_LIMITS_H
  75 #include <limits.h>
  76 #endif
  77 #if HAVE_STDLIB_H
  78 #include <stdlib.h>
  79 #endif
  80 #if HAVE_STRING_H
  81 #include <string.h>
  82 #endif
  83
  84 /* OS-specific includes */
  85 #ifdef _OSK
  86 #include <modes.h>
  87 #include <strings.h>
  88 #endif
  89
  90 #ifdef __TANDEM
  91 #include <floss.h>
  92 #endif
  93
  94 #if MSDOS_COMPILER==WIN32C || OS2
  95 #include <io.h>
  96 #endif
  97
  98 #if MSDOS_COMPILER==DJGPPC
  99 #include <io.h>
 100 #include <sys/exceptn.h>
 101 #include <conio.h>
 102 #include <pc.h>
 103 #endif
 104
 105 #if !HAVE_STDLIB_H
 106 char *getenv();
 107 off_t lseek();
 108 VOID_POINTER calloc();
 109 void free();
 110 #endif
 111
 112 /*
 113  * Simple lowercase test which can be used during option processing
 114  * (before options are parsed which might tell us what charset to use).
 115  */
 116 #define ASCII_IS_UPPER(c)       ((c) >= 'A' && (c) <= 'Z')
 117 #define ASCII_IS_LOWER(c)       ((c) >= 'a' && (c) <= 'z')
 118 #define ASCII_TO_UPPER(c)       ((c) - 'a' + 'A')
 119 #define ASCII_TO_LOWER(c)       ((c) - 'A' + 'a')
 120
 121 #undef IS_UPPER
 122 #undef IS_LOWER
 123 #undef TO_UPPER
 124 #undef TO_LOWER
 125 #undef IS_SPACE
 126 #undef IS_DIGIT
 127
 128 #if !HAVE_UPPER_LOWER
 129 #define IS_UPPER(c)     ASCII_IS_UPPER(c)
 130 #define IS_LOWER(c)     ASCII_IS_LOWER(c)
 131 #define TO_UPPER(c)     ASCII_TO_UPPER(c)
 132 #define TO_LOWER(c)     ASCII_TO_LOWER(c)
 133 #else
 134 #define IS_UPPER(c)     isupper((unsigned char) (c))
 135 #define IS_LOWER(c)     islower((unsigned char) (c))
 136 #define TO_UPPER(c)     toupper((unsigned char) (c))
 137 #define TO_LOWER(c)     tolower((unsigned char) (c))
 138 #endif
 139
 140 #ifdef isspace
 141 #define IS_SPACE(c)     isspace((unsigned char)(c))
 142 #else
 143 #define IS_SPACE(c)     ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f')
 144 #endif
 145
 146 #ifdef isdigit
 147 #define IS_DIGIT(c)     isdigit((unsigned char)(c))
 148 #else
 149 #define IS_DIGIT(c)     ((c) >= '0' && (c) <= '9')
 150 #endif
 151
 152 #define IS_CSI_START(c) ((c) == ESC || ((unsigned char)(c)) == CSI)
 153
 154 #ifndef NULL
 155 #define NULL    0
 156 #endif
 157
 158 #ifndef TRUE
 159 #define TRUE            1
 160 #endif
 161 #ifndef FALSE
 162 #define FALSE           0
 163 #endif
 164
 165 #define OPT_OFF         0
 166 #define OPT_ON          1
 167 #define OPT_ONPLUS      2
 168
 169 #if !HAVE_MEMCPY
 170 #ifndef memcpy
 171 #define memcpy(to,from,len)     bcopy((from),(to),(len))
 172 #endif
 173 #endif
 174
 175 #if HAVE_SNPRINTF
 176 #define SNPRINTF1(str, size, fmt, v1)             snprintf((str), (size), (fmt), (v1))
 177 #define SNPRINTF2(str, size, fmt, v1, v2)         snprintf((str), (size), (fmt), (v1), (v2))
 178 #define SNPRINTF3(str, size, fmt, v1, v2, v3)     snprintf((str), (size), (fmt), (v1), (v2), (v3))
 179 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4))
 180 #else
 181 /* Use unsafe sprintf if we don't have snprintf. */
 182 #define SNPRINTF1(str, size, fmt, v1)             sprintf((str), (fmt), (v1))
 183 #define SNPRINTF2(str, size, fmt, v1, v2)         sprintf((str), (fmt), (v1), (v2))
 184 #define SNPRINTF3(str, size, fmt, v1, v2, v3)     sprintf((str), (fmt), (v1), (v2), (v3))
 185 #define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4))
 186 #endif
 187
 188 #define BAD_LSEEK       ((off_t)-1)
 189
 190 #ifndef CHAR_BIT
 191 #define CHAR_BIT 8
 192 #endif
 193
 194 /*
 195  * Upper bound on the string length of an integer converted to string.
 196  * 302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
 197  * add 1 for integer division truncation; add 1 more for a minus sign.
 198  */
 199 #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
 200
 201 /*
 202  * Special types and constants.
 203  */
 204 typedef unsigned long LWCHAR;
 205 typedef off_t           POSITION;
 206 typedef off_t           LINENUM;
 207 #define MIN_LINENUM_WIDTH  7    /* Min printing width of a line number */
 208 #define MAX_UTF_CHAR_LEN   6    /* Max bytes in one UTF-8 char */
 209
 210 #define NULL_POSITION   ((POSITION)(-1))
 211
 212 /*
 213  * Flags for open()
 214  */
 215 #if MSDOS_COMPILER || OS2
 216 #define OPEN_READ       (O_RDONLY|O_BINARY)
 217 #else
 218 #ifdef _OSK
 219 #define OPEN_READ       (S_IREAD)
 220 #else
 221 #ifdef O_RDONLY
 222 #define OPEN_READ       (O_RDONLY)
 223 #else
 224 #define OPEN_READ       (0)
 225 #endif
 226 #endif
 227 #endif
 228
 229 #if defined(O_WRONLY) && defined(O_APPEND)
 230 #define OPEN_APPEND     (O_APPEND|O_WRONLY)
 231 #else
 232 #ifdef _OSK
 233 #define OPEN_APPEND     (S_IWRITE)
 234 #else
 235 #define OPEN_APPEND     (1)
 236 #endif
 237 #endif
 238
 239 /*
 240  * Set a file descriptor to binary mode.
 241  */
 242 #if MSDOS_COMPILER==MSOFTC
 243 #define SET_BINARY(f)   _setmode(f, _O_BINARY);
 244 #else
 245 #if MSDOS_COMPILER || OS2
 246 #define SET_BINARY(f)   setmode(f, O_BINARY)
 247 #else
 248 #define SET_BINARY(f)
 249 #endif
 250 #endif
 251
 252 /*
 253  * Does the shell treat "?" as a metacharacter?
 254  */
 255 #if MSDOS_COMPILER || OS2 || _OSK
 256 #define SHELL_META_QUEST 0
 257 #else
 258 #define SHELL_META_QUEST 1
 259 #endif
 260
 261 #define SPACES_IN_FILENAMES 1
 262
 263 /*
 264  * An IFILE represents an input file.
 265  */
 266 #define IFILE           VOID_POINTER
 267 #define NULL_IFILE      ((IFILE)NULL)
 268
 269 /*
 270  * The structure used to represent a "screen position".
 271  * This consists of a file position, and a screen line number.
 272  * The meaning is that the line starting at the given file
 273  * position is displayed on the ln-th line of the screen.
 274  * (Screen lines before ln are empty.)
 275  */
 276 struct scrpos
 277 {
 278         POSITION pos;
 279         int ln;
 280 };
 281
 282 typedef union parg
 283 {
 284         char *p_string;
 285         int p_int;
 286         LINENUM p_linenum;
 287 } PARG;
 288
 289 #define NULL_PARG       ((PARG *)NULL)
 290
 291 struct textlist
 292 {
 293         char *string;
 294         char *endstring;
 295 };
 296
 297 #define EOI             (-1)
 298
 299 #define READ_INTR       (-2)
 300
 301 /* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
 302 #define NUM_FRAC_DENOM                  1000000
 303 #define NUM_LOG_FRAC_DENOM              6
 304
 305 /* How quiet should we be? */
 306 #define NOT_QUIET       0       /* Ring bell at eof and for errors */
 307 #define LITTLE_QUIET    1       /* Ring bell only for errors */
 308 #define VERY_QUIET      2       /* Never ring bell */
 309
 310 /* How should we prompt? */
 311 #define PR_SHORT        0       /* Prompt with colon */
 312 #define PR_MEDIUM       1       /* Prompt with message */
 313 #define PR_LONG         2       /* Prompt with longer message */
 314
 315 /* How should we handle backspaces? */
 316 #define BS_SPECIAL      0       /* Do special things for underlining and bold */
 317 #define BS_NORMAL       1       /* \b treated as normal char; actually output */
 318 #define BS_CONTROL      2       /* \b treated as control char; prints as ^H */
 319
 320 /* How should we search? */
 321 #define SRCH_FORW       (1 << 0)  /* Search forward from current position */
 322 #define SRCH_BACK       (1 << 1)  /* Search backward from current position */
 323 #define SRCH_NO_MOVE    (1 << 2)  /* Highlight, but don't move */
 324 #define SRCH_FIND_ALL   (1 << 4)  /* Find and highlight all matches */
 325 #define SRCH_NO_MATCH   (1 << 8)  /* Search for non-matching lines */
 326 #define SRCH_PAST_EOF   (1 << 9)  /* Search past end-of-file, into next file */
 327 #define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
 328 #define SRCH_NO_REGEX   (1 << 12) /* Don't use regular expressions */
 329
 330 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
 331                                 (((t) & ~SRCH_FORW) | SRCH_BACK) : \
 332                                 (((t) & ~SRCH_BACK) | SRCH_FORW))
 333
 334 /* */
 335 #define NO_MCA          0
 336 #define MCA_DONE        1
 337 #define MCA_MORE        2
 338
 339 #define CC_OK           0       /* Char was accepted & processed */
 340 #define CC_QUIT         1       /* Char was a request to abort current cmd */
 341 #define CC_ERROR        2       /* Char could not be accepted due to error */
 342 #define CC_PASS         3       /* Char was rejected (internal) */
 343
 344 #define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
 345
 346 /* Special char bit-flags used to tell put_line() to do something special */
 347 #define AT_NORMAL       (0)
 348 #define AT_UNDERLINE    (1 << 0)
 349 #define AT_BOLD         (1 << 1)
 350 #define AT_BLINK        (1 << 2)
 351 #define AT_STANDOUT     (1 << 3)
 352 #define AT_ANSI         (1 << 4)  /* Content-supplied "ANSI" escape sequence */
 353 #define AT_BINARY       (1 << 5)  /* LESS*BINFMT representation */
 354 #define AT_HILITE       (1 << 6)  /* Internal highlights (e.g., for search) */
 355
 356 #if '0' == 240
 357 #define IS_EBCDIC_HOST 1
 358 #endif
 359
 360 #if IS_EBCDIC_HOST
 361 /*
 362  * Long definition for EBCDIC.
 363  * Since the argument is usually a constant, this macro normally compiles
 364  * into a constant.
 365  */
 366 #define CONTROL(c) ( \
 367         (c)=='[' ? '\047' : \
 368         (c)=='a' ? '\001' : \
 369         (c)=='b' ? '\002' : \
 370         (c)=='c' ? '\003' : \
 371         (c)=='d' ? '\067' : \
 372         (c)=='e' ? '\055' : \
 373         (c)=='f' ? '\056' : \
 374         (c)=='g' ? '\057' : \
 375         (c)=='h' ? '\026' : \
 376         (c)=='i' ? '\005' : \
 377         (c)=='j' ? '\025' : \
 378         (c)=='k' ? '\013' : \
 379         (c)=='l' ? '\014' : \
 380         (c)=='m' ? '\015' : \
 381         (c)=='n' ? '\016' : \
 382         (c)=='o' ? '\017' : \
 383         (c)=='p' ? '\020' : \
 384         (c)=='q' ? '\021' : \
 385         (c)=='r' ? '\022' : \
 386         (c)=='s' ? '\023' : \
 387         (c)=='t' ? '\074' : \
 388         (c)=='u' ? '\075' : \
 389         (c)=='v' ? '\062' : \
 390         (c)=='w' ? '\046' : \
 391         (c)=='x' ? '\030' : \
 392         (c)=='y' ? '\031' : \
 393         (c)=='z' ? '\077' : \
 394         (c)=='A' ? '\001' : \
 395         (c)=='B' ? '\002' : \
 396         (c)=='C' ? '\003' : \
 397         (c)=='D' ? '\067' : \
 398         (c)=='E' ? '\055' : \
 399         (c)=='F' ? '\056' : \
 400         (c)=='G' ? '\057' : \
 401         (c)=='H' ? '\026' : \
 402         (c)=='I' ? '\005' : \
 403         (c)=='J' ? '\025' : \
 404         (c)=='K' ? '\013' : \
 405         (c)=='L' ? '\014' : \
 406         (c)=='M' ? '\015' : \
 407         (c)=='N' ? '\016' : \
 408         (c)=='O' ? '\017' : \
 409         (c)=='P' ? '\020' : \
 410         (c)=='Q' ? '\021' : \
 411         (c)=='R' ? '\022' : \
 412         (c)=='S' ? '\023' : \
 413         (c)=='T' ? '\074' : \
 414         (c)=='U' ? '\075' : \
 415         (c)=='V' ? '\062' : \
 416         (c)=='W' ? '\046' : \
 417         (c)=='X' ? '\030' : \
 418         (c)=='Y' ? '\031' : \
 419         (c)=='Z' ? '\077' : \
 420         (c)=='|' ? '\031' : \
 421         (c)=='\\' ? '\034' : \
 422         (c)=='^' ? '\036' : \
 423         (c)&077)
 424 #else
 425 #define CONTROL(c)      ((c)&037)
 426 #endif /* IS_EBCDIC_HOST */
 427
 428 #define ESC             CONTROL('[')
 429 #define CSI             ((unsigned char)'\233')
 430
 431 #if _OSK_MWC32
 432 #define LSIGNAL(sig,func)       os9_signal(sig,func)
 433 #else
 434 #define LSIGNAL(sig,func)       signal(sig,func)
 435 #endif
 436
 437 #if HAVE_SIGPROCMASK
 438 #if HAVE_SIGSET_T
 439 #else
 440 #undef HAVE_SIGPROCMASK
 441 #endif
 442 #endif
 443 #if HAVE_SIGPROCMASK
 444 #if HAVE_SIGEMPTYSET
 445 #else
 446 #undef  sigemptyset
 447 #define sigemptyset(mp) *(mp) = 0
 448 #endif
 449 #endif
 450
 451 #define S_INTERRUPT     01
 452 #define S_STOP          02
 453 #define S_WINCH         04
 454 #define ABORT_SIGS()    (sigs & (S_INTERRUPT|S_STOP))
 455
 456 #define QUIT_OK         0
 457 #define QUIT_ERROR      1
 458 #define QUIT_SAVED_STATUS (-1)
 459
 460 /* filestate flags */
 461 #define CH_CANSEEK      001
 462 #define CH_KEEPOPEN     002
 463 #define CH_POPENED      004
 464 #define CH_HELPFILE     010
 465
 466 #define ch_zero()       ((POSITION)0)
 467
 468 #define FAKE_HELPFILE   "@/\\less/\\help/\\file/\\@"
 469
 470 #include "funcs.h"
 471
 472 /* Functions not included in funcs.h */
 473 void postoa();
 474 void linenumtoa();
 475 void inttoa();