contrib/less-381/less.h

   1 /*
   2  * Copyright (C) 1984-2002  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
  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_LIMITS_H
  74 #include <limits.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 #ifdef _OSK
  83 #include <modes.h>
  84 #include <strings.h>
  85 #endif
  86 #if MSDOS_COMPILER==WIN32C || OS2
  87 #include <io.h>
  88 #endif
  89 #if MSDOS_COMPILER==DJGPPC
  90 #include <io.h>
  91 #include <sys/exceptn.h>
  92 #include <conio.h>
  93 #include <pc.h>
  94 #endif
  95
  96 #if !HAVE_STDLIB_H
  97 char *getenv();
  98 off_t lseek();
  99 VOID_POINTER calloc();
 100 void free();
 101 #endif
 102
 103 /*
 104  * Simple lowercase test which can be used during option processing
 105  * (before options are parsed which might tell us what charset to use).
 106  */
 107 #define SIMPLE_IS_UPPER(c)      ((c) >= 'A' && (c) <= 'Z')
 108 #define SIMPLE_IS_LOWER(c)      ((c) >= 'a' && (c) <= 'z')
 109 #define SIMPLE_TO_UPPER(c)      ((c) - 'a' + 'A')
 110 #define SIMPLE_TO_LOWER(c)      ((c) - 'A' + 'a')
 111
 112 #if !HAVE_UPPER_LOWER
 113 #define isupper(c)      SIMPLE_IS_UPPER(c)
 114 #define islower(c)      SIMPLE_IS_LOWER(c)
 115 #define toupper(c)      SIMPLE_TO_UPPER(c)
 116 #define tolower(c)      SIMPLE_TO_LOWER(c)
 117 #endif
 118
 119 #ifndef NULL
 120 #define NULL    0
 121 #endif
 122
 123 #ifndef TRUE
 124 #define TRUE            1
 125 #endif
 126 #ifndef FALSE
 127 #define FALSE           0
 128 #endif
 129
 130 #define OPT_OFF         0
 131 #define OPT_ON          1
 132 #define OPT_ONPLUS      2
 133
 134 #if !HAVE_MEMCPY
 135 #ifndef memcpy
 136 #define memcpy(to,from,len)     bcopy((from),(to),(len))
 137 #endif
 138 #endif
 139
 140 #define BAD_LSEEK       ((off_t)-1)
 141
 142 #ifndef CHAR_BIT
 143 #define CHAR_BIT 8
 144 #endif
 145
 146 /*
 147  * Upper bound on the string length of an integer converted to string.
 148  * 302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
 149  * add 1 for integer division truncation; add 1 more for a minus sign.
 150  */
 151 #define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
 152
 153 /*
 154  * Special types and constants.
 155  */
 156 typedef off_t           POSITION;
 157 typedef off_t           LINENUM;
 158 #define MIN_LINENUM_WIDTH  7    /* Min printing width of a line number */
 159
 160 #define NULL_POSITION   ((POSITION)(-1))
 161
 162 /*
 163  * Flags for open()
 164  */
 165 #if MSDOS_COMPILER || OS2
 166 #define OPEN_READ       (O_RDONLY|O_BINARY)
 167 #else
 168 #ifdef _OSK
 169 #define OPEN_READ       (S_IREAD)
 170 #else
 171 #ifdef O_RDONLY
 172 #define OPEN_READ       (O_RDONLY)
 173 #else
 174 #define OPEN_READ       (0)
 175 #endif
 176 #endif
 177 #endif
 178
 179 #if defined(O_WRONLY) && defined(O_APPEND)
 180 #define OPEN_APPEND     (O_APPEND|O_WRONLY)
 181 #else
 182 #ifdef _OSK
 183 #define OPEN_APPEND     (S_IWRITE)
 184 #else
 185 #define OPEN_APPEND     (1)
 186 #endif
 187 #endif
 188
 189 /*
 190  * Set a file descriptor to binary mode.
 191  */
 192 #if MSDOS_COMPILER==MSOFTC
 193 #define SET_BINARY(f)   _setmode(f, _O_BINARY);
 194 #else
 195 #if MSDOS_COMPILER || OS2
 196 #define SET_BINARY(f)   setmode(f, O_BINARY)
 197 #else
 198 #define SET_BINARY(f)
 199 #endif
 200 #endif
 201
 202 /*
 203  * Does the shell treat "?" as a metacharacter?
 204  */
 205 #if MSDOS_COMPILER || OS2 || _OSK
 206 #define SHELL_META_QUEST 0
 207 #else
 208 #define SHELL_META_QUEST 1
 209 #endif
 210
 211 #define SPACES_IN_FILENAMES 1
 212
 213 /*
 214  * An IFILE represents an input file.
 215  */
 216 #define IFILE           VOID_POINTER
 217 #define NULL_IFILE      ((IFILE)NULL)
 218
 219 /*
 220  * The structure used to represent a "screen position".
 221  * This consists of a file position, and a screen line number.
 222  * The meaning is that the line starting at the given file
 223  * position is displayed on the ln-th line of the screen.
 224  * (Screen lines before ln are empty.)
 225  */
 226 struct scrpos
 227 {
 228         POSITION pos;
 229         int ln;
 230 };
 231
 232 typedef union parg
 233 {
 234         char *p_string;
 235         int p_int;
 236         LINENUM p_linenum;
 237 } PARG;
 238
 239 #define NULL_PARG       ((PARG *)NULL)
 240
 241 struct textlist
 242 {
 243         char *string;
 244         char *endstring;
 245 };
 246
 247 #define EOI             (-1)
 248
 249 #define READ_INTR       (-2)
 250
 251 /* How quiet should we be? */
 252 #define NOT_QUIET       0       /* Ring bell at eof and for errors */
 253 #define LITTLE_QUIET    1       /* Ring bell only for errors */
 254 #define VERY_QUIET      2       /* Never ring bell */
 255
 256 /* How should we prompt? */
 257 #define PR_SHORT        0       /* Prompt with colon */
 258 #define PR_MEDIUM       1       /* Prompt with message */
 259 #define PR_LONG         2       /* Prompt with longer message */
 260
 261 /* How should we handle backspaces? */
 262 #define BS_SPECIAL      0       /* Do special things for underlining and bold */
 263 #define BS_NORMAL       1       /* \b treated as normal char; actually output */
 264 #define BS_CONTROL      2       /* \b treated as control char; prints as ^H */
 265
 266 /* How should we search? */
 267 #define SRCH_FORW       000001  /* Search forward from current position */
 268 #define SRCH_BACK       000002  /* Search backward from current position */
 269 #define SRCH_NO_MOVE    000004  /* Highlight, but don't move */
 270 #define SRCH_FIND_ALL   000010  /* Find and highlight all matches */
 271 #define SRCH_NO_MATCH   000100  /* Search for non-matching lines */
 272 #define SRCH_PAST_EOF   000200  /* Search past end-of-file, into next file */
 273 #define SRCH_FIRST_FILE 000400  /* Search starting at the first file */
 274 #define SRCH_NO_REGEX   001000  /* Don't use regular expressions */
 275
 276 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
 277                                 (((t) & ~SRCH_FORW) | SRCH_BACK) : \
 278                                 (((t) & ~SRCH_BACK) | SRCH_FORW))
 279
 280 /* */
 281 #define NO_MCA          0
 282 #define MCA_DONE        1
 283 #define MCA_MORE        2
 284
 285 #define CC_OK           0       /* Char was accepted & processed */
 286 #define CC_QUIT         1       /* Char was a request to abort current cmd */
 287 #define CC_ERROR        2       /* Char could not be accepted due to error */
 288 #define CC_PASS         3       /* Char was rejected (internal) */
 289
 290 #define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
 291
 292 /* Special chars used to tell put_line() to do something special */
 293 #define AT_NORMAL       (0)
 294 #define AT_UNDERLINE    (1)
 295 #define AT_BOLD         (2)
 296 #define AT_BLINK        (3)
 297 #define AT_INVIS        (4)
 298 #define AT_STANDOUT     (5)
 299
 300 #if '0' == 240
 301 #define IS_EBCDIC_HOST 1
 302 #endif
 303
 304 #if IS_EBCDIC_HOST
 305 /*
 306  * Long definition for EBCDIC.
 307  * Since the argument is usually a constant, this macro normally compiles
 308  * into a constant.
 309  */
 310 #define CONTROL(c) ( \
 311         (c)=='[' ? '\047' : \
 312         (c)=='a' ? '\001' : \
 313         (c)=='b' ? '\002' : \
 314         (c)=='c' ? '\003' : \
 315         (c)=='d' ? '\067' : \
 316         (c)=='e' ? '\055' : \
 317         (c)=='f' ? '\056' : \
 318         (c)=='g' ? '\057' : \
 319         (c)=='h' ? '\026' : \
 320         (c)=='i' ? '\005' : \
 321         (c)=='j' ? '\025' : \
 322         (c)=='k' ? '\013' : \
 323         (c)=='l' ? '\014' : \
 324         (c)=='m' ? '\015' : \
 325         (c)=='n' ? '\016' : \
 326         (c)=='o' ? '\017' : \
 327         (c)=='p' ? '\020' : \
 328         (c)=='q' ? '\021' : \
 329         (c)=='r' ? '\022' : \
 330         (c)=='s' ? '\023' : \
 331         (c)=='t' ? '\074' : \
 332         (c)=='u' ? '\075' : \
 333         (c)=='v' ? '\062' : \
 334         (c)=='w' ? '\046' : \
 335         (c)=='x' ? '\030' : \
 336         (c)=='y' ? '\031' : \
 337         (c)=='z' ? '\077' : \
 338         (c)=='A' ? '\001' : \
 339         (c)=='B' ? '\002' : \
 340         (c)=='C' ? '\003' : \
 341         (c)=='D' ? '\067' : \
 342         (c)=='E' ? '\055' : \
 343         (c)=='F' ? '\056' : \
 344         (c)=='G' ? '\057' : \
 345         (c)=='H' ? '\026' : \
 346         (c)=='I' ? '\005' : \
 347         (c)=='J' ? '\025' : \
 348         (c)=='K' ? '\013' : \
 349         (c)=='L' ? '\014' : \
 350         (c)=='M' ? '\015' : \
 351         (c)=='N' ? '\016' : \
 352         (c)=='O' ? '\017' : \
 353         (c)=='P' ? '\020' : \
 354         (c)=='Q' ? '\021' : \
 355         (c)=='R' ? '\022' : \
 356         (c)=='S' ? '\023' : \
 357         (c)=='T' ? '\074' : \
 358         (c)=='U' ? '\075' : \
 359         (c)=='V' ? '\062' : \
 360         (c)=='W' ? '\046' : \
 361         (c)=='X' ? '\030' : \
 362         (c)=='Y' ? '\031' : \
 363         (c)=='Z' ? '\077' : \
 364         (c)=='|' ? '\031' : \
 365         (c)=='\\' ? '\034' : \
 366         (c)=='^' ? '\036' : \
 367         (c)&077)
 368 #else
 369 #define CONTROL(c)      ((c)&037)
 370 #endif /* IS_EBCDIC_HOST */
 371
 372 #define ESC             CONTROL('[')
 373
 374 #if _OSK_MWC32
 375 #define LSIGNAL(sig,func)       os9_signal(sig,func)
 376 #else
 377 #define LSIGNAL(sig,func)       signal(sig,func)
 378 #endif
 379
 380 #if HAVE_SIGPROCMASK
 381 #if HAVE_SIGSET_T
 382 #else
 383 #undef HAVE_SIGPROCMASK
 384 #endif
 385 #endif
 386 #if HAVE_SIGPROCMASK
 387 #if HAVE_SIGEMPTYSET
 388 #else
 389 #undef  sigemptyset
 390 #define sigemptyset(mp) *(mp) = 0
 391 #endif
 392 #endif
 393
 394 #define S_INTERRUPT     01
 395 #define S_STOP          02
 396 #define S_WINCH         04
 397 #define ABORT_SIGS()    (sigs & (S_INTERRUPT|S_STOP))
 398
 399 #define QUIT_OK         0
 400 #define QUIT_ERROR      1
 401 #define QUIT_SAVED_STATUS (-1)
 402
 403 /* filestate flags */
 404 #define CH_CANSEEK      001
 405 #define CH_KEEPOPEN     002
 406 #define CH_POPENED      004
 407 #define CH_HELPFILE     010
 408
 409 #define ch_zero()       ((POSITION)0)
 410
 411 #define FAKE_HELPFILE   "@/\\less/\\help/\\file/\\@"
 412
 413 #include "funcs.h"
 414
 415 /* Functions not included in funcs.h */
 416 void postoa();
 417 void linenumtoa();
 418 void inttoa();