544 lines
12 KiB
C
544 lines
12 KiB
C
/*
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* Copyright (C) 1984-2017 Mark Nudelman
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Less License, as specified in the README file.
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*
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* For more information, see the README file.
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*/
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#define NEWBOT 1
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/*
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* Standard include file for "less".
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*/
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/*
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* Defines for MSDOS_COMPILER.
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*/
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#define MSOFTC 1 /* Microsoft C */
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#define BORLANDC 2 /* Borland C */
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#define WIN32C 3 /* Windows (Borland C or Microsoft C) */
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#define DJGPPC 4 /* DJGPP C */
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/*
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* Include the file of compile-time options.
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* The <> make cc search for it in -I., not srcdir.
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*/
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#include <defines.h>
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#ifdef _SEQUENT_
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/*
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* Kludge for Sequent Dynix systems that have sigsetmask, but
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* it's not compatible with the way less calls it.
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* {{ Do other systems need this? }}
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*/
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#undef HAVE_SIGSETMASK
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#endif
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/*
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* Language details.
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*/
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#if HAVE_ANSI_PROTOS
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#define LESSPARAMS(a) a
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#else
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#define LESSPARAMS(a) ()
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#endif
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#if HAVE_VOID
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#define VOID_POINTER void *
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#define VOID_PARAM void
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#else
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#define VOID_POINTER char *
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#define VOID_PARAM
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#define void int
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#endif
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#if HAVE_CONST
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#define constant const
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#else
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#define constant
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#endif
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#define public /* PUBLIC FUNCTION */
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/* Library function declarations */
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_CTYPE_H
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#include <ctype.h>
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#endif
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#if HAVE_WCTYPE_H
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#include <wctype.h>
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#endif
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#if HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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/* OS-specific includes */
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#ifdef _OSK
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#include <modes.h>
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#include <strings.h>
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#endif
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#ifdef __TANDEM
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#include <floss.h>
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#endif
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#if MSDOS_COMPILER==WIN32C || OS2
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#include <io.h>
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#endif
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#if MSDOS_COMPILER==DJGPPC
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#include <io.h>
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#include <sys/exceptn.h>
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#include <conio.h>
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#include <pc.h>
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#endif
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#if !HAVE_STDLIB_H
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char *getenv();
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off_t lseek();
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VOID_POINTER calloc();
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void free();
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#endif
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/*
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* Simple lowercase test which can be used during option processing
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* (before options are parsed which might tell us what charset to use).
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*/
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#define ASCII_IS_UPPER(c) ((c) >= 'A' && (c) <= 'Z')
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#define ASCII_IS_LOWER(c) ((c) >= 'a' && (c) <= 'z')
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#define ASCII_TO_UPPER(c) ((c) - 'a' + 'A')
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#define ASCII_TO_LOWER(c) ((c) - 'A' + 'a')
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#undef IS_UPPER
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#undef IS_LOWER
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#undef TO_UPPER
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#undef TO_LOWER
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#undef IS_SPACE
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#undef IS_DIGIT
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#if HAVE_WCTYPE
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#define IS_UPPER(c) iswupper(c)
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#define IS_LOWER(c) iswlower(c)
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#define TO_UPPER(c) towupper(c)
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#define TO_LOWER(c) towlower(c)
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#else
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#if HAVE_UPPER_LOWER
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#define IS_UPPER(c) isupper((unsigned char) (c))
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#define IS_LOWER(c) islower((unsigned char) (c))
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#define TO_UPPER(c) toupper((unsigned char) (c))
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#define TO_LOWER(c) tolower((unsigned char) (c))
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#else
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#define IS_UPPER(c) ASCII_IS_UPPER(c)
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#define IS_LOWER(c) ASCII_IS_LOWER(c)
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#define TO_UPPER(c) ASCII_TO_UPPER(c)
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#define TO_LOWER(c) ASCII_TO_LOWER(c)
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#endif
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#endif
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#ifdef isspace
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#define IS_SPACE(c) isspace((unsigned char)(c))
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#else
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#define IS_SPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n' || (c) == '\r' || (c) == '\f')
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#endif
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#ifdef isdigit
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#define IS_DIGIT(c) isdigit((unsigned char)(c))
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#else
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#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
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#endif
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#define IS_CSI_START(c) (((LWCHAR)(c)) == ESC || (((LWCHAR)(c)) == CSI))
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#ifndef NULL
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#define NULL 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#define OPT_OFF 0
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#define OPT_ON 1
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#define OPT_ONPLUS 2
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#if !HAVE_MEMCPY
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#ifndef memcpy
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#define memcpy(to,from,len) bcopy((from),(to),(len))
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#endif
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#endif
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#if HAVE_SNPRINTF
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#define SNPRINTF1(str, size, fmt, v1) snprintf((str), (size), (fmt), (v1))
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#define SNPRINTF2(str, size, fmt, v1, v2) snprintf((str), (size), (fmt), (v1), (v2))
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#define SNPRINTF3(str, size, fmt, v1, v2, v3) snprintf((str), (size), (fmt), (v1), (v2), (v3))
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#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) snprintf((str), (size), (fmt), (v1), (v2), (v3), (v4))
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#else
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/* Use unsafe sprintf if we don't have snprintf. */
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#define SNPRINTF1(str, size, fmt, v1) sprintf((str), (fmt), (v1))
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#define SNPRINTF2(str, size, fmt, v1, v2) sprintf((str), (fmt), (v1), (v2))
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#define SNPRINTF3(str, size, fmt, v1, v2, v3) sprintf((str), (fmt), (v1), (v2), (v3))
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#define SNPRINTF4(str, size, fmt, v1, v2, v3, v4) sprintf((str), (fmt), (v1), (v2), (v3), (v4))
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#endif
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#define BAD_LSEEK ((off_t)-1)
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2
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#endif
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#ifndef CHAR_BIT
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#define CHAR_BIT 8
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#endif
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/*
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* Upper bound on the string length of an integer converted to string.
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* 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
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* add 1 for integer division truncation; add 1 more for a minus sign.
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*/
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#define INT_STRLEN_BOUND(t) ((sizeof(t) * CHAR_BIT - 1) * 302 / 1000 + 1 + 1)
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/*
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* Special types and constants.
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*/
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typedef unsigned long LWCHAR;
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typedef off_t POSITION;
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typedef off_t LINENUM;
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#define MIN_LINENUM_WIDTH 7 /* Min printing width of a line number */
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#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
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#define NULL_POSITION ((POSITION)(-1))
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/*
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* Flags for open()
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*/
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#if MSDOS_COMPILER || OS2
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#define OPEN_READ (O_RDONLY|O_BINARY)
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#else
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#ifdef _OSK
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#define OPEN_READ (S_IREAD)
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#else
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#ifdef O_RDONLY
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#define OPEN_READ (O_RDONLY)
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#else
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#define OPEN_READ (0)
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#endif
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#endif
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#endif
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#if defined(O_WRONLY) && defined(O_APPEND)
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#define OPEN_APPEND (O_APPEND|O_WRONLY)
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#else
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#ifdef _OSK
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#define OPEN_APPEND (S_IWRITE)
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#else
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#define OPEN_APPEND (1)
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#endif
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#endif
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/*
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* Set a file descriptor to binary mode.
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*/
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#if MSDOS_COMPILER==MSOFTC
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#define SET_BINARY(f) _setmode(f, _O_BINARY);
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#else
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#if MSDOS_COMPILER || OS2
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#define SET_BINARY(f) setmode(f, O_BINARY)
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#else
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#define SET_BINARY(f)
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#endif
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#endif
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/*
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* Does the shell treat "?" as a metacharacter?
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*/
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#if MSDOS_COMPILER || OS2 || _OSK
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#define SHELL_META_QUEST 0
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#else
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#define SHELL_META_QUEST 1
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#endif
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#define SPACES_IN_FILENAMES 1
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/*
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* An IFILE represents an input file.
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*/
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#define IFILE VOID_POINTER
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#define NULL_IFILE ((IFILE)NULL)
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/*
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* The structure used to represent a "screen position".
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* This consists of a file position, and a screen line number.
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* The meaning is that the line starting at the given file
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* position is displayed on the ln-th line of the screen.
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* (Screen lines before ln are empty.)
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*/
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struct scrpos
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{
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POSITION pos;
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int ln;
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};
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/*
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* A mark is an ifile (input file) plus a position within the file.
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*/
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struct mark
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{
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IFILE m_ifile;
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struct scrpos m_scrpos;
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};
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typedef union parg
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{
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char *p_string;
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int p_int;
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LINENUM p_linenum;
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} PARG;
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#define NULL_PARG ((PARG *)NULL)
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struct textlist
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{
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char *string;
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char *endstring;
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};
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struct wchar_range
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{
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LWCHAR first, last;
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};
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struct wchar_range_table
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{
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struct wchar_range *table;
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int count;
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};
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#define EOI (-1)
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#define READ_INTR (-2)
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/* A fraction is represented by an int n; the fraction is n/NUM_FRAC_DENOM */
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#define NUM_FRAC_DENOM 1000000
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#define NUM_LOG_FRAC_DENOM 6
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/* How quiet should we be? */
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#define NOT_QUIET 0 /* Ring bell at eof and for errors */
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#define LITTLE_QUIET 1 /* Ring bell only for errors */
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#define VERY_QUIET 2 /* Never ring bell */
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/* How should we prompt? */
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#define PR_SHORT 0 /* Prompt with colon */
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#define PR_MEDIUM 1 /* Prompt with message */
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#define PR_LONG 2 /* Prompt with longer message */
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/* How should we handle backspaces? */
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#define BS_SPECIAL 0 /* Do special things for underlining and bold */
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#define BS_NORMAL 1 /* \b treated as normal char; actually output */
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#define BS_CONTROL 2 /* \b treated as control char; prints as ^H */
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/* How should we search? */
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#define SRCH_FORW (1 << 0) /* Search forward from current position */
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#define SRCH_BACK (1 << 1) /* Search backward from current position */
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#define SRCH_NO_MOVE (1 << 2) /* Highlight, but don't move */
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#define SRCH_FIND_ALL (1 << 4) /* Find and highlight all matches */
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#define SRCH_NO_MATCH (1 << 8) /* Search for non-matching lines */
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#define SRCH_PAST_EOF (1 << 9) /* Search past end-of-file, into next file */
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#define SRCH_FIRST_FILE (1 << 10) /* Search starting at the first file */
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#define SRCH_NO_REGEX (1 << 12) /* Don't use regular expressions */
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#define SRCH_FILTER (1 << 13) /* Search is for '&' (filter) command */
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#define SRCH_AFTER_TARGET (1 << 14) /* Start search after the target line */
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#define SRCH_REVERSE(t) (((t) & SRCH_FORW) ? \
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(((t) & ~SRCH_FORW) | SRCH_BACK) : \
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(((t) & ~SRCH_BACK) | SRCH_FORW))
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/* */
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#define NO_MCA 0
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#define MCA_DONE 1
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#define MCA_MORE 2
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#define CC_OK 0 /* Char was accepted & processed */
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#define CC_QUIT 1 /* Char was a request to abort current cmd */
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#define CC_ERROR 2 /* Char could not be accepted due to error */
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#define CC_PASS 3 /* Char was rejected (internal) */
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#define CF_QUIT_ON_ERASE 0001 /* Abort cmd if its entirely erased */
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/* Special char bit-flags used to tell put_line() to do something special */
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#define AT_NORMAL (0)
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#define AT_UNDERLINE (1 << 0)
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#define AT_BOLD (1 << 1)
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#define AT_BLINK (1 << 2)
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#define AT_STANDOUT (1 << 3)
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#define AT_ANSI (1 << 4) /* Content-supplied "ANSI" escape sequence */
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#define AT_BINARY (1 << 5) /* LESS*BINFMT representation */
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#define AT_HILITE (1 << 6) /* Internal highlights (e.g., for search) */
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#if '0' == 240
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#define IS_EBCDIC_HOST 1
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#endif
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#if IS_EBCDIC_HOST
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/*
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* Long definition for EBCDIC.
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* Since the argument is usually a constant, this macro normally compiles
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* into a constant.
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*/
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#define CONTROL(c) ( \
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(c)=='[' ? '\047' : \
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(c)=='a' ? '\001' : \
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(c)=='b' ? '\002' : \
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(c)=='c' ? '\003' : \
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(c)=='d' ? '\067' : \
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(c)=='e' ? '\055' : \
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(c)=='f' ? '\056' : \
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(c)=='g' ? '\057' : \
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(c)=='h' ? '\026' : \
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(c)=='i' ? '\005' : \
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(c)=='j' ? '\025' : \
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(c)=='k' ? '\013' : \
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(c)=='l' ? '\014' : \
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(c)=='m' ? '\015' : \
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(c)=='n' ? '\016' : \
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(c)=='o' ? '\017' : \
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(c)=='p' ? '\020' : \
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(c)=='q' ? '\021' : \
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(c)=='r' ? '\022' : \
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(c)=='s' ? '\023' : \
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(c)=='t' ? '\074' : \
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(c)=='u' ? '\075' : \
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(c)=='v' ? '\062' : \
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(c)=='w' ? '\046' : \
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(c)=='x' ? '\030' : \
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(c)=='y' ? '\031' : \
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(c)=='z' ? '\077' : \
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(c)=='A' ? '\001' : \
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(c)=='B' ? '\002' : \
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(c)=='C' ? '\003' : \
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(c)=='D' ? '\067' : \
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(c)=='E' ? '\055' : \
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(c)=='F' ? '\056' : \
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(c)=='G' ? '\057' : \
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(c)=='H' ? '\026' : \
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(c)=='I' ? '\005' : \
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(c)=='J' ? '\025' : \
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(c)=='K' ? '\013' : \
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(c)=='L' ? '\014' : \
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(c)=='M' ? '\015' : \
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(c)=='N' ? '\016' : \
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(c)=='O' ? '\017' : \
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(c)=='P' ? '\020' : \
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(c)=='Q' ? '\021' : \
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(c)=='R' ? '\022' : \
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(c)=='S' ? '\023' : \
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(c)=='T' ? '\074' : \
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(c)=='U' ? '\075' : \
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(c)=='V' ? '\062' : \
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(c)=='W' ? '\046' : \
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(c)=='X' ? '\030' : \
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(c)=='Y' ? '\031' : \
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(c)=='Z' ? '\077' : \
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(c)=='|' ? '\031' : \
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(c)=='\\' ? '\034' : \
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(c)=='^' ? '\036' : \
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(c)&077)
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#else
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#define CONTROL(c) ((c)&037)
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#endif /* IS_EBCDIC_HOST */
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#define ESC CONTROL('[')
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#define CSI ((unsigned char)'\233')
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#define CHAR_END_COMMAND 0x40000000
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#if _OSK_MWC32
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#define LSIGNAL(sig,func) os9_signal(sig,func)
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#else
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#define LSIGNAL(sig,func) signal(sig,func)
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#endif
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#if HAVE_SIGPROCMASK
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#if HAVE_SIGSET_T
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#else
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#undef HAVE_SIGPROCMASK
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#endif
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#endif
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#if HAVE_SIGPROCMASK
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#if HAVE_SIGEMPTYSET
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#else
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#undef sigemptyset
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#define sigemptyset(mp) *(mp) = 0
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#endif
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#endif
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#define S_INTERRUPT 01
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#define S_STOP 02
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#define S_WINCH 04
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#define ABORT_SIGS() (sigs & (S_INTERRUPT|S_STOP))
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#define QUIT_OK 0
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#define QUIT_ERROR 1
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#define QUIT_INTERRUPT 2
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#define QUIT_SAVED_STATUS (-1)
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#define FOLLOW_DESC 0
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#define FOLLOW_NAME 1
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/* filestate flags */
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#define CH_CANSEEK 001
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#define CH_KEEPOPEN 002
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#define CH_POPENED 004
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#define CH_HELPFILE 010
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#define CH_NODATA 020 /* Special case for zero length files */
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#define ch_zero() ((POSITION)0)
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#define FAKE_HELPFILE "@/\\less/\\help/\\file/\\@"
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#define FAKE_EMPTYFILE "@/\\less/\\empty/\\file/\\@"
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/* Flags for cvt_text */
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#define CVT_TO_LC 01 /* Convert upper-case to lower-case */
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#define CVT_BS 02 /* Do backspace processing */
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#define CVT_CRLF 04 /* Remove CR after LF */
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#define CVT_ANSI 010 /* Remove ANSI escape sequences */
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#if HAVE_TIME_T
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#define time_type time_t
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#else
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#define time_type long
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#endif
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struct mlist;
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struct loption;
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struct hilite_tree;
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#include "pattern.h"
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#include "funcs.h"
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/* Functions not included in funcs.h */
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void postoa LESSPARAMS ((POSITION, char*));
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void linenumtoa LESSPARAMS ((LINENUM, char*));
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void inttoa LESSPARAMS ((int, char*));
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