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/* $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 *);
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