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freebsd-src/contrib/less/less.h
Xin LI f80a33ea41 MFV: less v643. 
MFC after:	2 weeks
2023-08-13 00:13:31 -07:00

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/*
* Copyright (C) 1984-2023 Mark Nudelman
*
* 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.
*/
#define NEWBOT 1
/*
* Standard include file for "less".
*/
/*
* Defines for MSDOS_COMPILER.
*/
#define MSOFTC 1 /* Microsoft C */
#define BORLANDC 2 /* Borland C */
#define WIN32C 3 /* Windows (Borland C or Microsoft C) */
#define DJGPPC 4 /* DJGPP C */
/*
* Include the file of compile-time options.
* The <> make cc search for it in -I., not srcdir.
*/
#include <defines.h>
#ifdef _SEQUENT_
/*
* Kludge for Sequent Dynix systems that have sigsetmask, but
* it's not compatible with the way less calls it.
* {{ Do other systems need this? }}
*/
#undef HAVE_SIGSETMASK
#endif
/*
* Language details.
*/
#if HAVE_CONST
#define constant const
#else
#define constant
#endif
#define public /* PUBLIC FUNCTION */
/* Library function declarations */
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_CTYPE_H
#include <ctype.h>
#endif
#if HAVE_WCTYPE_H
#include <wctype.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
#if HAVE_STDINT_H
#include <stdint.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_STDCKDINT_H
#include <stdckdint.h>
#else
/*
* These substitutes for C23 stdckdint macros do not set *R on overflow,
* and they assume A and B are nonnegative. That is good enough for us.
*/
#define ckd_add(r, a, b) help_ckd_add(r, a, b, sizeof *(r), signed_expr(*(r)))
#define ckd_mul(r, a, b) help_ckd_mul(r, a, b, sizeof *(r), signed_expr(*(r)))
/* True if the integer expression E, after promotion, is signed. */
#define signed_expr(e) ((TRUE ? 0 : e) - 1 < 0)
#endif
#if defined UINTMAX_MAX
typedef uintmax_t uintmax;
#elif defined ULLONG_MAX
typedef unsigned long long uintmax;
#else
typedef unsigned long uintmax;
#endif
/* OS-specific includes */
#ifdef _OSK
#include <modes.h>
#include <strings.h>
#endif
#ifdef __TANDEM
#include <floss.h>
#endif
#if MSDOS_COMPILER==WIN32C || OS2
#include <io.h>
#endif
#if MSDOS_COMPILER==DJGPPC
#include <io.h>
#include <sys/exceptn.h>
#include <conio.h>
#include <pc.h>
#endif
#if !HAVE_STDLIB_H
char *getenv();
off_t lseek();
void *calloc();
void free();
#endif
/*
* Simple lowercase test which can be used during option processing
* (before options are parsed which might tell us what charset to use).
*/
#define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z')
#define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z')
#define ASCII_TO_UPPER(c) ((c) - 'a' + 'A')
#define ASCII_TO_LOWER(c) ((c) - 'A' + 'a')
#undef IS_UPPER
#undef IS_LOWER
#undef TO_UPPER
#undef TO_LOWER
#undef IS_SPACE
#undef IS_DIGIT
#if HAVE_WCTYPE
#define IS_UPPER(c) iswupper(c)
#define IS_LOWER(c) iswlower(c)
#define TO_UPPER(c) towupper(c)
#define TO_LOWER(c) towlower(c)
#else
#if HAVE_UPPER_LOWER
#define IS_UPPER(c) isupper((unsigned char) (c))
#define IS_LOWER(c) islower((unsigned char) (c))
#define TO_UPPER(c) toupper((unsigned char) (c))
#define TO_LOWER(c) tolower((unsigned char) (c))
#else
#define IS_UPPER(c) ASCII_IS_UPPER(c)
#define IS_LOWER(c) ASCII_IS_LOWER(c)
#define TO_UPPER(c) ASCII_TO_UPPER(c)
#define TO_LOWER(c) ASCII_TO_LOWER(c)
#endif
#endif
#ifdef isspace
#define IS_SPACE(c) isspace((unsigned char)(c))
#else
#define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f')
#endif
#ifdef isdigit
#define IS_DIGIT(c) isdigit((unsigned char)(c))
#else
#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
#endif
#define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI))
#ifndef NULL
#define NULL 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define OPT_OFF 0
#define OPT_ON 1
#define OPT_ONPLUS 2
#if !HAVE_MEMCPY
#ifndef memcpy
#define memcpy(to,from,len) bcopy((from),(to),(len))
#endif
#endif
#if HAVE_SNPRINTF
#define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1))
#define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2))
#define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3))
#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4))
#else
/* Use unsafe sprintf if we don't have snprintf. */
#define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1))
#define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2))
#define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3))
#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4))
#endif
#define BAD_LSEEK ((off_t)-1)
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifndef SEEK_END
#define SEEK_END 2
#endif
#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 POSITION;
typedef off_t LINENUM;
#define MIN_LINENUM_WIDTH 7 /* Default min printing width of a line number */
#define MAX_LINENUM_WIDTH 16 /* Max width of a line number */
#define MAX_STATUSCOL_WIDTH 4 /* Max width of the status column */
#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
#define MAX_PRCHAR_LEN 31 /* Max chars in prchar() result */
#define NULL_POSITION ((POSITION)(-1))
/*
* Flags for open()
*/
#if MSDOS_COMPILER || OS2
#define OPEN_READ (O_RDONLY|O_BINARY)
#else
#ifdef _OSK
#define OPEN_READ (S_IREAD)
#else
#ifdef O_RDONLY
#define OPEN_READ (O_RDONLY)
#else
#define OPEN_READ (0)
#endif
#endif
#endif
#if defined(O_WRONLY) && defined(O_APPEND)
#define OPEN_APPEND (O_APPEND|O_WRONLY)
#else
#ifdef _OSK
#define OPEN_APPEND (S_IWRITE)
#else
#define OPEN_APPEND (1)
#endif
#endif
/*
* Flags for creat()
*/
#if MSDOS_COMPILER
#define CREAT_RW (S_IREAD|S_IWRITE)
#else
#define CREAT_RW 0644
#endif
/*
* Set a file descriptor to binary mode.
*/
#if MSDOS_COMPILER==MSOFTC
#define SET_BINARY(f) _setmode(f, _O_BINARY);
#else
#if MSDOS_COMPILER || OS2
#define SET_BINARY(f) setmode(f, O_BINARY)
#else
#define SET_BINARY(f)
#endif
#endif
/*
* Does the shell treat "?" as a metacharacter?
*/
#if MSDOS_COMPILER || OS2 || _OSK
#define SHELL_META_QUEST 0
#else
#define SHELL_META_QUEST 1
#endif
#define SPACES_IN_FILENAMES 1
/*
* An IFILE represents an input file.
*/
#define IFILE void*
#define NULL_IFILE ((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
{
POSITION pos;
int ln;
};
typedef union parg
{
char *p_string;
int p_int;
LINENUM p_linenum;
char p_char;
} PARG;
#define NULL_PARG ((PARG *)NULL)
struct textlist
{
char *string;
char *endstring;
};
struct wchar_range
{
LWCHAR first, last;
};
struct wchar_range_table
{
struct wchar_range *table;
int count;
};
#if HAVE_POLL
typedef short POLL_EVENTS;
#endif
#define EOI (-1)
#define READ_ERR (-1)
#define READ_INTR (-2)
#define READ_AGAIN (-3)
/*
* A fraction is represented by a long n; the fraction is n/NUM_FRAC_DENOM.
* To avoid overflow problems, 0 <= n < NUM_FRAC_DENUM <= LONG_MAX/100.
*/
#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_INCR (1 << 3) /* Incremental search */
#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_WRAP (1 << 15) /* Wrap-around search (continue at BOF/EOF) */
#define SRCH_SUBSEARCH(i) (1 << (16+(i))) /* Search for subpattern */
/* {{ Depends on NUM_SEARCH_COLORS==5 }} */
#define SRCH_SUBSEARCH_ALL (SRCH_SUBSEARCH(1)|SRCH_SUBSEARCH(2)|SRCH_SUBSEARCH(3)|SRCH_SUBSEARCH(4)|SRCH_SUBSEARCH(5))
#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 AT_COLOR_SHIFT 8
#define AT_NUM_COLORS 16
#define AT_COLOR ((AT_NUM_COLORS-1) << AT_COLOR_SHIFT)
#define AT_COLOR_ATTN (1 << AT_COLOR_SHIFT)
#define AT_COLOR_BIN (2 << AT_COLOR_SHIFT)
#define AT_COLOR_CTRL (3 << AT_COLOR_SHIFT)
#define AT_COLOR_ERROR (4 << AT_COLOR_SHIFT)
#define AT_COLOR_LINENUM (5 << AT_COLOR_SHIFT)
#define AT_COLOR_MARK (6 << AT_COLOR_SHIFT)
#define AT_COLOR_PROMPT (7 << AT_COLOR_SHIFT)
#define AT_COLOR_RSCROLL (8 << AT_COLOR_SHIFT)
#define AT_COLOR_HEADER (9 << AT_COLOR_SHIFT)
#define AT_COLOR_SEARCH (10 << AT_COLOR_SHIFT)
#define AT_COLOR_SUBSEARCH(i) ((10+(i)) << AT_COLOR_SHIFT)
#define NUM_SEARCH_COLORS (AT_NUM_COLORS-10-1)
typedef enum { CT_NULL, CT_4BIT, CT_6BIT } COLOR_TYPE;
typedef enum {
CV_BLUE = 1,
CV_GREEN = 2,
CV_RED = 4,
CV_BRIGHT = 8,
CV_NOCHANGE = -2,
CV_ERROR = -1
} COLOR_VALUE;
/* ANSI states */
#define ANSI_MID 1
#define ANSI_ERR 2
#define ANSI_END 3
#if '0' == 240
#define IS_EBCDIC_HOST 1
#endif
#if IS_EBCDIC_HOST
/*
* Long definition for EBCDIC.
* Since the argument is usually a constant, this macro normally compiles
* into a constant.
*/
#define CONTROL(c) ( \
(c)=='[' ? '\047' : \
(c)=='a' ? '\001' : \
(c)=='b' ? '\002' : \
(c)=='c' ? '\003' : \
(c)=='d' ? '\067' : \
(c)=='e' ? '\055' : \
(c)=='f' ? '\056' : \
(c)=='g' ? '\057' : \
(c)=='h' ? '\026' : \
(c)=='i' ? '\005' : \
(c)=='j' ? '\025' : \
(c)=='k' ? '\013' : \
(c)=='l' ? '\014' : \
(c)=='m' ? '\015' : \
(c)=='n' ? '\016' : \
(c)=='o' ? '\017' : \
(c)=='p' ? '\020' : \
(c)=='q' ? '\021' : \
(c)=='r' ? '\022' : \
(c)=='s' ? '\023' : \
(c)=='t' ? '\074' : \
(c)=='u' ? '\075' : \
(c)=='v' ? '\062' : \
(c)=='w' ? '\046' : \
(c)=='x' ? '\030' : \
(c)=='y' ? '\031' : \
(c)=='z' ? '\077' : \
(c)=='A' ? '\001' : \
(c)=='B' ? '\002' : \
(c)=='C' ? '\003' : \
(c)=='D' ? '\067' : \
(c)=='E' ? '\055' : \
(c)=='F' ? '\056' : \
(c)=='G' ? '\057' : \
(c)=='H' ? '\026' : \
(c)=='I' ? '\005' : \
(c)=='J' ? '\025' : \
(c)=='K' ? '\013' : \
(c)=='L' ? '\014' : \
(c)=='M' ? '\015' : \
(c)=='N' ? '\016' : \
(c)=='O' ? '\017' : \
(c)=='P' ? '\020' : \
(c)=='Q' ? '\021' : \
(c)=='R' ? '\022' : \
(c)=='S' ? '\023' : \
(c)=='T' ? '\074' : \
(c)=='U' ? '\075' : \
(c)=='V' ? '\062' : \
(c)=='W' ? '\046' : \
(c)=='X' ? '\030' : \
(c)=='Y' ? '\031' : \
(c)=='Z' ? '\077' : \
(c)=='|' ? '\031' : \
(c)=='\\' ? '\034' : \
(c)=='^' ? '\036' : \
(c)&077)
#else
#define CONTROL(c) ((c)&037)
#endif /* IS_EBCDIC_HOST */
#define ESC CONTROL('[')
#define ESCS "\33"
#define CSI ((unsigned char)'\233')
#define CHAR_END_COMMAND 0x40000000
#if _OSK_MWC32
#define LSIGNAL(sig,func) os9_signal(sig,func)
#else
#define LSIGNAL(sig,func) signal(sig,func)
#endif
#if HAVE_SIGPROCMASK
#if HAVE_SIGSET_T
#else
#undef HAVE_SIGPROCMASK
#endif
#endif
#if HAVE_SIGPROCMASK
#if HAVE_SIGEMPTYSET
#else
#undef sigemptyset
#define sigemptyset(mp) *(mp) = 0
#endif
#endif
#define S_INTERRUPT 01
#define S_STOP 02
#define S_WINCH 04
#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
#ifdef EXIT_SUCCESS
#define QUIT_OK EXIT_SUCCESS
#else
#define QUIT_OK 0
#endif
#ifdef EXIT_FAILURE
#define QUIT_ERROR EXIT_FAILURE
#define QUIT_INTERRUPT (EXIT_FAILURE+1)
#else
#define QUIT_ERROR 1
#define QUIT_INTERRUPT 2
#endif
#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() ((POSITION)0)
#define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@"
#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 */
#if HAVE_TIME_T
#define time_type time_t
#else
#define time_type long
#endif
/* X11 mouse reporting definitions */
#define X11MOUSE_BUTTON1 0 /* Left button press */
#define X11MOUSE_BUTTON2 1 /* Middle button press */
#define X11MOUSE_BUTTON3 2 /* Right button press */
#define X11MOUSE_BUTTON_REL 3 /* Button release */
#define X11MOUSE_WHEEL_UP 0x40 /* Wheel scroll up */
#define X11MOUSE_WHEEL_DOWN 0x41 /* Wheel scroll down */
#define X11MOUSE_OFFSET 0x20 /* Added to button & pos bytes to create a char */
#if LESSTEST
#define LESS_DUMP_CHAR CONTROL(']')
#endif
struct mlist;
struct loption;
struct hilite_tree;
struct ansi_state;
#include "pattern.h"
#include "xbuf.h"
#include "funcs.h"
/* Functions not included in funcs.h */
void postoa(POSITION, char*, int);
void linenumtoa(LINENUM, char*, int);
void inttoa(int, char*, int);
int lstrtoi(char*, char**, int);
POSITION lstrtopos(char*, char**, int);
unsigned long lstrtoul(char*, char**, int);
#if MSDOS_COMPILER==WIN32C
int pclose(FILE*);
#endif
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