bin/less/less.h

   1 /*
   2  * Copyright (C) 1984-2012  Mark Nudelman
   3  * Modified for use with illumos by Garrett D'Amore.
   4  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   5  *
   6  * You may distribute under the terms of either the GNU General Public
   7  * License or the Less License, as specified in the README file.
   8  *
   9  * For more information, see the README file.
  10  */
  11
  12 /*
  13  * Standard include file for "less".
  14  */
  15
  16 #include "defines.h"
  17
  18 #include <sys/types.h>
  19
  20 #include <ctype.h>
  21 #include <fcntl.h>
  22 #include <libgen.h>
  23 #include <limits.h>
  24 #include <signal.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <wctype.h>
  30
  31 /*
  32  * Simple lowercase test which can be used during option processing
  33  * (before options are parsed which might tell us what charset to use).
  34  */
  35
  36 #undef IS_SPACE
  37 #undef IS_DIGIT
  38
  39 #define IS_SPACE(c)     isspace((unsigned char)(c))
  40 #define IS_DIGIT(c)     isdigit((unsigned char)(c))
  41
  42 #define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI))
  43
  44 #ifndef TRUE
  45 #define TRUE            1
  46 #endif
  47 #ifndef FALSE
  48 #define FALSE           0
  49 #endif
  50
  51 #define OPT_OFF         0
  52 #define OPT_ON          1
  53 #define OPT_ONPLUS      2
  54
  55 /*
  56  * Special types and constants.
  57  */
  58 typedef unsigned long LWCHAR;
  59 #define MIN_LINENUM_WIDTH  7    /* Min printing width of a line number */
  60 #define MAX_UTF_CHAR_LEN   6    /* Max bytes in one UTF-8 char */
  61
  62 #define SHELL_META_QUEST 1
  63
  64 /*
  65  * An IFILE represents an input file.
  66  */
  67 #define IFILE           void *
  68
  69 /*
  70  * The structure used to represent a "screen position".
  71  * This consists of a file position, and a screen line number.
  72  * The meaning is that the line starting at the given file
  73  * position is displayed on the ln-th line of the screen.
  74  * (Screen lines before ln are empty.)
  75  */
  76 struct scrpos {
  77         off_t pos;
  78         int ln;
  79 };
  80
  81 typedef union parg {
  82         char *p_string;
  83         int p_int;
  84         off_t p_linenum;
  85 } PARG;
  86
  87 struct textlist {
  88         char *string;
  89         char *endstring;
  90 };
  91
  92 #define EOI             (-1)
  93
  94 #define READ_INTR       (-2)
  95
  96 /* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
  97 #define NUM_FRAC_DENOM                  1000000
  98 #define NUM_LOG_FRAC_DENOM              6
  99
 100 /* How quiet should we be? */
 101 #define NOT_QUIET       0       /* Ring bell at eof and for errors */
 102 #define LITTLE_QUIET    1       /* Ring bell only for errors */
 103 #define VERY_QUIET      2       /* Never ring bell */
 104
 105 /* How should we prompt? */
 106 #define PR_SHORT        0       /* Prompt with colon */
 107 #define PR_MEDIUM       1       /* Prompt with message */
 108 #define PR_LONG         2       /* Prompt with longer message */
 109
 110 /* How should we handle backspaces? */
 111 #define BS_SPECIAL      0       /* Do special things for underlining and bold */
 112 #define BS_NORMAL       1       /* \b treated as normal char; actually output */
 113 #define BS_CONTROL      2       /* \b treated as control char; prints as ^H */
 114
 115 /* How should we search? */
 116 #define SRCH_FORW       (1 << 0)  /* Search forward from current position */
 117 #define SRCH_BACK       (1 << 1)  /* Search backward from current position */
 118 #define SRCH_NO_MOVE    (1 << 2)  /* Highlight, but don't move */
 119 #define SRCH_FIND_ALL   (1 << 4)  /* Find and highlight all matches */
 120 #define SRCH_NO_MATCH   (1 << 8)  /* Search for non-matching lines */
 121 #define SRCH_PAST_EOF   (1 << 9)  /* Search past end-of-file, into next file */
 122 #define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
 123 #define SRCH_NO_REGEX   (1 << 12) /* Don't use regular expressions */
 124 #define SRCH_FILTER     (1 << 13) /* Search is for '&' (filter) command */
 125 #define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */
 126
 127 #define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
 128                                 (((t) & ~SRCH_FORW) | SRCH_BACK) : \
 129                                 (((t) & ~SRCH_BACK) | SRCH_FORW))
 130
 131 /* */
 132 #define NO_MCA          0
 133 #define MCA_DONE        1
 134 #define MCA_MORE        2
 135
 136 #define CC_OK           0       /* Char was accepted & processed */
 137 #define CC_QUIT         1       /* Char was a request to abort current cmd */
 138 #define CC_ERROR        2       /* Char could not be accepted due to error */
 139 #define CC_PASS         3       /* Char was rejected (internal) */
 140
 141 #define CF_QUIT_ON_ERASE 0001   /* Abort cmd if its entirely erased */
 142
 143 /* Special char bit-flags used to tell put_line() to do something special */
 144 #define AT_NORMAL       (0)
 145 #define AT_UNDERLINE    (1 << 0)
 146 #define AT_BOLD         (1 << 1)
 147 #define AT_BLINK        (1 << 2)
 148 #define AT_STANDOUT     (1 << 3)
 149 #define AT_ANSI         (1 << 4)  /* Content-supplied "ANSI" escape sequence */
 150 #define AT_BINARY       (1 << 5)  /* LESS*BINFMT representation */
 151 #define AT_HILITE       (1 << 6)  /* Internal highlights (e.g., for search) */
 152 #define AT_INDET        (1 << 7)  /* Indeterminate: either bold or underline */
 153
 154 #define CONTROL(c)      ((c)&037)
 155
 156 #define ESC             CONTROL('[')
 157 #define CSI             ((unsigned char)'\233')
 158
 159 #define S_INTERRUPT     01
 160 #define S_STOP          02
 161 #define S_WINCH         04
 162 #define ABORT_SIGS()    (sigs & (S_INTERRUPT|S_STOP))
 163
 164 #define QUIT_OK         0
 165 #define QUIT_ERROR      1
 166 #define QUIT_INTERRUPT  2
 167 #define QUIT_SAVED_STATUS (-1)
 168
 169 #define FOLLOW_DESC     0
 170 #define FOLLOW_NAME     1
 171
 172 /* filestate flags */
 173 #define CH_CANSEEK      001
 174 #define CH_KEEPOPEN     002
 175 #define CH_POPENED      004
 176 #define CH_HELPFILE     010
 177 #define CH_NODATA       020     /* Special case for zero length files */
 178
 179
 180 #define ch_zero()       (0)
 181
 182 #define FAKE_EMPTYFILE  "@/\\less/\\empty/\\file/\\@"
 183
 184 /* Flags for cvt_text */
 185 #define CVT_TO_LC       01      /* Convert upper-case to lower-case */
 186 #define CVT_BS          02      /* Do backspace processing */
 187 #define CVT_CRLF        04      /* Remove CR after LF */
 188 #define CVT_ANSI        010     /* Remove ANSI escape sequences */
 189
 190 #include "funcs.h"
 191
 192 /* Functions not included in funcs.h */
 193 void postoa(off_t, char *, size_t);
 194 void inttoa(int, char *, size_t);