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freebsd-dev/contrib/less/less.h
Robert Watson 1ea316270f Currently, less(1) uses K&R prototypes, which both fails to provide useful 
compiler-time type checking, and also causes problems for targets where
multiple incompatible calling conventions may be selected based on argument
types.  This change switches less(1) to ANSI prototypes.

While there, we also remove use of "register", and attempt to use "const" a
bit better now that the compiler can check argument types.

Reviewed by:	cem, emaste
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D10152
2017-03-31 21:29:43 +00:00

534 lines
12 KiB
C
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/*
* Copyright (C) 1984-2015 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_VOID
#define VOID_POINTER void *
#else
#define VOID_POINTER char *
#define void int
#endif
#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_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#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_POINTER 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 /* Min printing width of a line number */
#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
#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
/*
* 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_POINTER
#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;
};
/*
* A mark is an ifile (input file) plus a position within the file.
*/
struct mark
{
IFILE m_ifile;
struct scrpos m_scrpos;
};
typedef union parg
{
char *p_string;
int p_int;
LINENUM p_linenum;
} 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;
};
#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) */
#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 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))
#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() ((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
#include "funcs.h"
/* Functions not included in funcs.h */
void postoa(POSITION num, char *buf);
void linenumtoa(LINENUM num, char *buf);
void inttoa(int num, char *buf);
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