627 lines
16 KiB
C
627 lines
16 KiB
C
/*
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* Copyright (C) 1984-2023 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_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_STDINT_H
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#include <stdint.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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#if HAVE_STDCKDINT_H
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#include <stdckdint.h>
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#else
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/*
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* These substitutes for C23 stdckdint macros do not set *R on overflow,
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* and they assume A and B are nonnegative. That is good enough for us.
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*/
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#define ckd_add(r, a, b) help_ckd_add(r, a, b, sizeof *(r), signed_expr(*(r)))
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#define ckd_mul(r, a, b) help_ckd_mul(r, a, b, sizeof *(r), signed_expr(*(r)))
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/* True if the integer expression E, after promotion, is signed. */
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#define signed_expr(e) ((TRUE ? 0 : e) - 1 < 0)
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#endif
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#if defined UINTMAX_MAX
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typedef uintmax_t uintmax;
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#elif defined ULLONG_MAX
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typedef unsigned long long uintmax;
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#else
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typedef unsigned long uintmax;
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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 *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 /* Default min printing width of a line number */
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#define MAX_LINENUM_WIDTH 16 /* Max width of a line number */
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#define MAX_STATUSCOL_WIDTH 4 /* Max width of the status column */
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#define MAX_UTF_CHAR_LEN 6 /* Max bytes in one UTF-8 char */
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#define MAX_PRCHAR_LEN 31 /* Max chars in prchar() result */
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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*
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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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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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char p_char;
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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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#if HAVE_POLL
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typedef short POLL_EVENTS;
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#endif
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#define EOI (-1)
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#define READ_ERR (-1)
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#define READ_INTR (-2)
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#define READ_AGAIN (-3)
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/*
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* A fraction is represented by a long n; the fraction is n/NUM_FRAC_DENOM.
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* To avoid overflow problems, 0 <= n < NUM_FRAC_DENUM <= LONG_MAX/100.
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*/
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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_INCR (1 << 3) /* Incremental search */
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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_WRAP (1 << 15) /* Wrap-around search (continue at BOF/EOF) */
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#define SRCH_SUBSEARCH(i) (1 << (16+(i))) /* Search for subpattern */
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/* {{ Depends on NUM_SEARCH_COLORS==5 }} */
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#define SRCH_SUBSEARCH_ALL (SRCH_SUBSEARCH(1)|SRCH_SUBSEARCH(2)|SRCH_SUBSEARCH(3)|SRCH_SUBSEARCH(4)|SRCH_SUBSEARCH(5))
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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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#define AT_COLOR_SHIFT 8
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#define AT_NUM_COLORS 16
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#define AT_COLOR ((AT_NUM_COLORS-1) << AT_COLOR_SHIFT)
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#define AT_COLOR_ATTN (1 << AT_COLOR_SHIFT)
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#define AT_COLOR_BIN (2 << AT_COLOR_SHIFT)
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#define AT_COLOR_CTRL (3 << AT_COLOR_SHIFT)
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#define AT_COLOR_ERROR (4 << AT_COLOR_SHIFT)
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#define AT_COLOR_LINENUM (5 << AT_COLOR_SHIFT)
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#define AT_COLOR_MARK (6 << AT_COLOR_SHIFT)
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#define AT_COLOR_PROMPT (7 << AT_COLOR_SHIFT)
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#define AT_COLOR_RSCROLL (8 << AT_COLOR_SHIFT)
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#define AT_COLOR_HEADER (9 << AT_COLOR_SHIFT)
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#define AT_COLOR_SEARCH (10 << AT_COLOR_SHIFT)
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#define AT_COLOR_SUBSEARCH(i) ((10+(i)) << AT_COLOR_SHIFT)
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#define NUM_SEARCH_COLORS (AT_NUM_COLORS-10-1)
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typedef enum { CT_NULL, CT_4BIT, CT_6BIT } COLOR_TYPE;
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typedef enum {
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CV_BLUE = 1,
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CV_GREEN = 2,
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CV_RED = 4,
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CV_BRIGHT = 8,
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CV_NOCHANGE = -2,
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CV_ERROR = -1
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} COLOR_VALUE;
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/* ANSI states */
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#define ANSI_MID 1
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#define ANSI_ERR 2
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#define ANSI_END 3
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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' : \
|
|
(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
|