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rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: file.h,v 1.22 2009/10/27 23:59:37 deraadt Exp $ */
/*
 * Copyright (c) Ian F. Darwin 1986-1995.
 * Software written by Ian F. Darwin and others;
 * maintained 1995-present by Christos Zoulas and others.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice immediately at the beginning of the file, without modification,
 *    this list of conditions, and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * file.h - definitions for file(1) program
 * @(#)$Id: file.h,v 1.22 2009/10/27 23:59:37 deraadt Exp $
 */

#ifndef __file_h__
#define __file_h__

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>	/* Include that here, to make sure __P gets defined */
#include <errno.h>
#include <fcntl.h>	/* For open and flags */
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#include <regex.h>
#include <sys/types.h>
/* Do this here and now, because struct stat gets re-defined on solaris */
#include <sys/stat.h>
#include <stdarg.h>

#define ENABLE_CONDITIONALS

#ifndef MAGIC
#define MAGIC "/etc/magic"
#endif

#ifdef __EMX__
#define PATHSEP	';'
#else
#define PATHSEP	':'
#endif

#define private static
#ifndef protected
#define protected
#endif
#define public

#ifndef __GNUC_PREREQ__
#ifdef __GNUC__
#define	__GNUC_PREREQ__(x, y)						\
	((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) ||			\
	 (__GNUC__ > (x)))
#else
#define	__GNUC_PREREQ__(x, y)	0
#endif
#endif

#ifndef MIN
#define	MIN(a,b)	(((a) < (b)) ? (a) : (b))
#endif

#ifndef MAX
#define	MAX(a,b)	(((a) > (b)) ? (a) : (b))
#endif

#ifndef HOWMANY
# define HOWMANY (256 * 1024)	/* how much of the file to look at */
#endif
#define MAXMAGIS 8192		/* max entries in any one magic file
				   or directory */
#define MAXDESC	64		/* max leng of text description/MIME type */
#define MAXstring 32		/* max leng of "string" types */

#define MAGICNO		0xF11E041C
#define VERSIONNO	5
#define FILE_MAGICSIZE	(32 * 6)

#define	FILE_LOAD	0
#define FILE_CHECK	1
#define FILE_COMPILE	2

struct magic {
	/* Word 1 */
	uint16_t cont_level;	/* level of ">" */
	uint8_t flag;
#define INDIR		0x01	/* if '(...)' appears */
#define OFFADD		0x02	/* if '>&' or '>...(&' appears */
#define INDIROFFADD	0x04	/* if '>&(' appears */
#define UNSIGNED	0x08	/* comparison is unsigned */
#define NOSPACE		0x10	/* suppress space character before output */
#define BINTEST		0x20	/* test is for a binary type (set only
                                   for top-level tests) */
#define TEXTTEST	0	/* for passing to file_softmagic */

	uint8_t dummy1;

	/* Word 2 */
	uint8_t reln;		/* relation (0=eq, '>'=gt, etc) */
	uint8_t vallen;		/* length of string value, if any */
	uint8_t type;		/* comparison type (FILE_*) */
	uint8_t in_type;	/* type of indirection */
#define 			FILE_INVALID	0
#define 			FILE_BYTE	1
#define				FILE_SHORT	2
#define				FILE_DEFAULT	3
#define				FILE_LONG	4
#define				FILE_STRING	5
#define				FILE_DATE	6
#define				FILE_BESHORT	7
#define				FILE_BELONG	8
#define				FILE_BEDATE	9
#define				FILE_LESHORT	10
#define				FILE_LELONG	11
#define				FILE_LEDATE	12
#define				FILE_PSTRING	13
#define				FILE_LDATE	14
#define				FILE_BELDATE	15
#define				FILE_LELDATE	16
#define				FILE_REGEX	17
#define				FILE_BESTRING16	18
#define				FILE_LESTRING16	19
#define				FILE_SEARCH	20
#define				FILE_MEDATE	21
#define				FILE_MELDATE	22
#define				FILE_MELONG	23
#define				FILE_QUAD	24
#define				FILE_LEQUAD	25
#define				FILE_BEQUAD	26
#define				FILE_QDATE	27
#define				FILE_LEQDATE	28
#define				FILE_BEQDATE	29
#define				FILE_QLDATE	30
#define				FILE_LEQLDATE	31
#define				FILE_BEQLDATE	32
#define				FILE_FLOAT	33
#define				FILE_BEFLOAT	34
#define				FILE_LEFLOAT	35
#define				FILE_DOUBLE	36
#define				FILE_BEDOUBLE	37
#define				FILE_LEDOUBLE	38
#define				FILE_NAMES_SIZE	39/* size of array to contain all names */

#define IS_STRING(t) \
	((t) == FILE_STRING || \
	 (t) == FILE_PSTRING || \
	 (t) == FILE_BESTRING16 || \
	 (t) == FILE_LESTRING16 || \
	 (t) == FILE_REGEX || \
	 (t) == FILE_SEARCH || \
	 (t) == FILE_DEFAULT)

#define FILE_FMT_NONE 0
#define FILE_FMT_NUM  1 /* "cduxXi" */
#define FILE_FMT_STR  2 /* "s" */
#define FILE_FMT_QUAD 3 /* "ll" */
#define FILE_FMT_FLOAT 4 /* "eEfFgG" */
#define FILE_FMT_DOUBLE 5 /* "eEfFgG" */

	/* Word 3 */
	uint8_t in_op;		/* operator for indirection */
	uint8_t mask_op;	/* operator for mask */
#ifdef ENABLE_CONDITIONALS
	uint8_t cond;		/* conditional type */
	uint8_t dummy2;	
#else
	uint8_t dummy2;	
	uint8_t dummy3;	
#endif

#define				FILE_OPS	"&|^+-*/%"
#define				FILE_OPAND	0
#define				FILE_OPOR	1
#define				FILE_OPXOR	2
#define				FILE_OPADD	3
#define				FILE_OPMINUS	4
#define				FILE_OPMULTIPLY	5
#define				FILE_OPDIVIDE	6
#define				FILE_OPMODULO	7
#define				FILE_OPS_MASK	0x07 /* mask for above ops */
#define				FILE_UNUSED_1	0x08
#define				FILE_UNUSED_2	0x10
#define				FILE_UNUSED_3	0x20
#define				FILE_OPINVERSE	0x40
#define				FILE_OPINDIRECT	0x80

#ifdef ENABLE_CONDITIONALS
#define				COND_NONE	0
#define				COND_IF		1
#define				COND_ELIF	2
#define				COND_ELSE	3
#endif /* ENABLE_CONDITIONALS */

	/* Word 4 */
	uint32_t offset;	/* offset to magic number */
	/* Word 5 */
	int32_t in_offset;	/* offset from indirection */
	/* Word 6 */
	uint32_t lineno;	/* line number in magic file */
	/* Word 7,8 */
	union {
		uint64_t _mask;	/* for use with numeric and date types */
		struct {
			uint32_t _count;	/* repeat/line count */
			uint32_t _flags;	/* modifier flags */
		} _s;		/* for use with string types */
	} _u;
#define num_mask _u._mask
#define str_range _u._s._count
#define str_flags _u._s._flags

	/* Words 9-16 */
	union VALUETYPE {
		uint8_t b;
		uint16_t h;
		uint32_t l;
		uint64_t q;
		uint8_t hs[2];	/* 2 bytes of a fixed-endian "short" */
		uint8_t hl[4];	/* 4 bytes of a fixed-endian "long" */
		uint8_t hq[8];	/* 8 bytes of a fixed-endian "quad" */
		char s[MAXstring];	/* the search string or regex pattern */
		float f;
		double d;
	} value;		/* either number or string */
	/* Words 17..31 */
	char desc[MAXDESC];	/* description */
	/* Words 32..47 */
	char mimetype[MAXDESC]; /* MIME type */
};

#define BIT(A)   (1 << (A))
#define STRING_COMPACT_BLANK		BIT(0)
#define STRING_COMPACT_OPTIONAL_BLANK	BIT(1)
#define STRING_IGNORE_LOWERCASE		BIT(2)
#define STRING_IGNORE_UPPERCASE		BIT(3)
#define REGEX_OFFSET_START		BIT(4)
#define CHAR_COMPACT_BLANK		'B'
#define CHAR_COMPACT_OPTIONAL_BLANK	'b'
#define CHAR_IGNORE_LOWERCASE		'c'
#define CHAR_IGNORE_UPPERCASE		'C'
#define CHAR_REGEX_OFFSET_START		's'
#define STRING_IGNORE_CASE		(STRING_IGNORE_LOWERCASE|STRING_IGNORE_UPPERCASE)
#define STRING_DEFAULT_RANGE		100


/* list of magic entries */
struct mlist {
	struct magic *magic;		/* array of magic entries */
	uint32_t nmagic;			/* number of entries in array */
	int mapped;  /* allocation type: 0 => apprentice_file
		      *                  1 => apprentice_map + malloc
		      *                  2 => apprentice_map + mmap */
	struct mlist *next, *prev;
};

struct magic_set {
	struct mlist *mlist;
	struct cont {
		size_t len;
		struct level_info {
			int32_t off;
			int got_match;
#ifdef ENABLE_CONDITIONALS
			int last_match;
			int last_cond;	/* used for error checking by parse() */
#endif
		} *li;
	} c;
	struct out {
		char *buf;		/* Accumulation buffer */
		char *pbuf;		/* Printable buffer */
	} o;
	uint32_t offset;
	int error;
	int flags;
	int haderr;
	const char *file;
	size_t line;			/* current magic line number */

	/* data for searches */
	struct {
		const char *s;		/* start of search in original source */
		size_t s_len;		/* length of search region */
		size_t offset;		/* starting offset in source: XXX - should this be off_t? */
		size_t rm_len;		/* match length */
	} search;

	/* FIXME: Make the string dynamically allocated so that e.g.
	   strings matched in files can be longer than MAXstring */
	union VALUETYPE ms_value;	/* either number or string */
};

/* Type for Unicode characters */
typedef unsigned long unichar;

struct stat;
protected const char *file_fmttime(uint32_t, int);
protected int file_buffer(struct magic_set *, int, const char *, const void *,
    size_t);
protected int file_fsmagic(struct magic_set *, const char *, struct stat *);
protected int file_pipe2file(struct magic_set *, int, const void *, size_t);
protected int file_printf(struct magic_set *, const char *, ...);
protected int file_reset(struct magic_set *);
protected int file_tryelf(struct magic_set *, int, const unsigned char *,
    size_t);
protected int file_zmagic(struct magic_set *, int, const char *,
    const unsigned char *, size_t);
protected int file_ascmagic(struct magic_set *, const unsigned char *, size_t);
protected int file_is_tar(struct magic_set *, const unsigned char *, size_t);
protected int file_softmagic(struct magic_set *, const unsigned char *, size_t, int);
protected struct mlist *file_apprentice(struct magic_set *, const char *, int);
protected uint64_t file_signextend(struct magic_set *, struct magic *,
    uint64_t);
protected void file_delmagic(struct magic *, int type, size_t entries);
protected void file_badread(struct magic_set *);
protected void file_badseek(struct magic_set *);
protected void file_oomem(struct magic_set *, size_t);
protected void file_error(struct magic_set *, int, const char *, ...);
protected void file_magerror(struct magic_set *, const char *, ...);
protected void file_magwarn(struct magic_set *, const char *, ...);
protected void file_mdump(struct magic *);
protected void file_showstr(FILE *, const char *, size_t);
protected size_t file_mbswidth(const char *);
protected const char *file_getbuffer(struct magic_set *);
protected ssize_t sread(int, void *, size_t, int);
protected int file_check_mem(struct magic_set *, unsigned int);
protected int file_looks_utf8(const unsigned char *, size_t, unichar *, size_t *);

#ifndef COMPILE_ONLY
extern const char *file_names[];
extern const size_t file_nnames;
#endif

#ifndef HAVE_STRERROR
extern int sys_nerr;
extern char *sys_errlist[];
#define strerror(e) \
	(((e) >= 0 && (e) < sys_nerr) ? sys_errlist[(e)] : "Unknown error")
#endif

#ifndef HAVE_STRTOUL
#define strtoul(a, b, c)	strtol(a, b, c)
#endif

#ifndef HAVE_VASPRINTF
int vasprintf(char **ptr, const char *format_string, va_list vargs);
#endif
#ifndef HAVE_ASPRINTF
int asprintf(char **ptr, const char *format_string, ...);
#endif

#if defined(HAVE_MMAP) && defined(HAVE_SYS_MMAN_H) && !defined(QUICK)
#define QUICK
#endif

#ifndef O_BINARY
#define O_BINARY	0
#endif

#endif /* __file_h__ */