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Revision 1.13, Sat Sep 3 11:41:10 2016 UTC (7 years, 9 months ago) by tedu
Branch: MAIN
CVS Tags: OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1
Changes since 1.12: +7 -10 lines 

start pulling apart some function pointers that take too many parameters
because of excessive code sharing. compression and decompression are not
entirely similar, they should share less.
ok joerg millert

/*	$OpenBSD: compress.h,v 1.13 2016/09/03 11:41:10 tedu Exp $	*/

/*
 * Copyright (c) 1997 Michael Shalayeff
 * All rights reserved.
 *
 * 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, 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 ``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 REGENTS 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.
 *
 */

#include <sys/stat.h>

struct z_info {
	u_int32_t mtime;	/* timestamp */
	u_int32_t crc;		/* crc */
	u_int32_t hlen;		/* header length */
	u_int64_t total_in;	/* # bytes in */
	u_int64_t total_out;	/* # bytes out */
};

/*
 * making it any bigger does not affect perfomance very much.
 * actually this value is just a little bit better than 8192.
 */
#define Z_BUFSIZE 16384

enum program_mode {
	MODE_COMP,
	MODE_DECOMP,
	MODE_CAT
} pmode;

/*
 * exit codes for compress
 */
#define	SUCCESS	0
#define	FAILURE	1
#define	WARNING	2

extern char null_magic[];

extern void *z_ropen(int, char *, int);
extern void *z_wopen(int, char *, int, u_int32_t);
extern FILE *zopen(const char *, const char *,int);
extern int zread(void *, char *, int);
extern int zwrite(void *, const char *, int);
extern int z_close(void *, struct z_info *, const char *, struct stat *);


extern void *gz_ropen(int, char *, int);
extern void *gz_wopen(int, char *, int, u_int32_t);
extern int gz_read(void *, char *, int);
extern int gz_write(void *, const char *, int);
extern int gz_close(void *, struct z_info *, const char *, struct stat *);
extern int gz_flush(void *, int);

extern void *null_ropen(int, char *, int);
extern void *null_wopen(int, char *, int, u_int32_t);
extern int null_read(void *, char *, int);
extern int null_write(void *, const char *, int);
extern int null_close(void *, struct z_info *, const char *, struct stat *);
extern int null_flush(void *, int);

extern void setfile(const char *, int, struct stat *);