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/*
* Copyright (C) 1984-2012 Mark Nudelman
* Modified for use with illumos by Garrett D'Amore.
* Copyright 2014 Garrett D'Amore <garrett@damore.org>
*
* You may distribute under the terms of either the GNU General Public
* License or the Less License, as specified in the README file.
*
* For more information, see the README file.
*/
/*
* Standard include file for "less".
*/
/*
* Include the file of compile-time options.
* The <> make cc search for it in -I., not srcdir.
*/
#include <defines.h>
/* Library function declarations */
#include <sys/types.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <wctype.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <signal.h>
/*
* Simple lowercase test which can be used during option processing
* (before options are parsed which might tell us what charset to use).
*/
#undef IS_UPPER
#undef IS_LOWER
#undef TO_UPPER
#undef TO_LOWER
#undef IS_SPACE
#undef IS_DIGIT
#define IS_UPPER(c) iswupper(c)
#define IS_LOWER(c) iswlower(c)
#define TO_UPPER(c) towupper(c)
#define TO_LOWER(c) towlower(c)
#define IS_SPACE(c) isspace((unsigned char)(c))
#define IS_DIGIT(c) isdigit((unsigned char)(c))
#define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI))
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define OPT_OFF 0
#define OPT_ON 1
#define OPT_ONPLUS 2
#ifndef CHAR_BIT
#define CHAR_BIT 8
#endif
/*
* Upper bound on the string length of an integer converted to string.
* 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
* add 1 for integer division truncation; add 1 more for a minus sign.
*/
#define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
/*
* Special types and constants.
*/
typedef unsigned long LWCHAR;
typedef off_t LINENUM;
#define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */
#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
#define SHELL_META_QUEST 1
#define SPACES_IN_FILENAMES 1
/*
* An IFILE represents an input file.
*/
#define IFILE void *
#define NULL_IFILE (NULL)
/*
* The structure used to represent a "screen position".
* This consists of a file position, and a screen line number.
* The meaning is that the line starting at the given file
* position is displayed on the ln-th line of the screen.
* (Screen lines before ln are empty.)
*/
struct scrpos {
off_t pos;
int ln;
};
typedef union parg {
char *p_string;
int p_int;
LINENUM p_linenum;
} PARG;
struct textlist {
char *string;
char *endstring;
};
#define EOI (-1)
#define READ_INTR (-2)
/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
#define NUM_FRAC_DENOM 1000000
#define NUM_LOG_FRAC_DENOM 6
/* How quiet should we be? */
#define NOT_QUIET 0 /* Ring bell at eof and for errors */
#define LITTLE_QUIET 1 /* Ring bell only for errors */
#define VERY_QUIET 2 /* Never ring bell */
/* How should we prompt? */
#define PR_SHORT 0 /* Prompt with colon */
#define PR_MEDIUM 1 /* Prompt with message */
#define PR_LONG 2 /* Prompt with longer message */
/* How should we handle backspaces? */
#define BS_SPECIAL 0 /* Do special things for underlining and bold */
#define BS_NORMAL 1 /* \b treated as normal char; actually output */
#define BS_CONTROL 2 /* \b treated as control char; prints as ^H */
/* How should we search? */
#define SRCH_FORW (1 << 0) /* Search forward from current position */
#define SRCH_BACK (1 << 1) /* Search backward from current position */
#define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */
#define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */
#define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */
#define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */
#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
#define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */
#define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */
#define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */
#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
(((t) & ~SRCH_FORW) | SRCH_BACK) : \
(((t) & ~SRCH_BACK) | SRCH_FORW))
/* */
#define NO_MCA 0
#define MCA_DONE 1
#define MCA_MORE 2
#define CC_OK 0 /* Char was accepted & processed */
#define CC_QUIT 1 /* Char was a request to abort current cmd */
#define CC_ERROR 2 /* Char could not be accepted due to error */
#define CC_PASS 3 /* Char was rejected (internal) */
#define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */
/* Special char bit-flags used to tell put_line() to do something special */
#define AT_NORMAL (0)
#define AT_UNDERLINE (1 << 0)
#define AT_BOLD (1 << 1)
#define AT_BLINK (1 << 2)
#define AT_STANDOUT (1 << 3)
#define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */
#define AT_BINARY (1 << 5) /* LESS*BINFMT representation */
#define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */
#define CONTROL(c) ((c)&037)
#define ESC CONTROL('[')
#define CSI ((unsigned char)'\233')
#define S_INTERRUPT 01
#define S_STOP 02
#define S_WINCH 04
#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
#define QUIT_OK 0
#define QUIT_ERROR 1
#define QUIT_INTERRUPT 2
#define QUIT_SAVED_STATUS (-1)
#define FOLLOW_DESC 0
#define FOLLOW_NAME 1
/* filestate flags */
#define CH_CANSEEK 001
#define CH_KEEPOPEN 002
#define CH_POPENED 004
#define CH_HELPFILE 010
#define CH_NODATA 020 /* Special case for zero length files */
#define ch_zero() (0)
#define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@"
/* Flags for cvt_text */
#define CVT_TO_LC 01 /* Convert upper-case to lower-case */
#define CVT_BS 02 /* Do backspace processing */
#define CVT_CRLF 04 /* Remove CR after LF */
#define CVT_ANSI 010 /* Remove ANSI escape sequences */
#include "funcs.h"
/* Functions not included in funcs.h */
void postoa(off_t, char *, size_t);
void linenumtoa(LINENUM, char *, size_t);
void inttoa(int, char *, size_t);
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