87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
/* $OpenBSD: compress.h,v 1.1 2016/09/03 13:05:08 tedu Exp $ */
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/*
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* Copyright (c) 1997 Michael Shalayeff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/stat.h>
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struct z_info {
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u_int32_t mtime; /* timestamp */
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u_int32_t crc; /* crc */
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u_int32_t hlen; /* header length */
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u_int64_t total_in; /* # bytes in */
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u_int64_t total_out; /* # bytes out */
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};
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/*
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* making it any bigger does not affect perfomance very much.
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* actually this value is just a little bit better than 8192.
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*/
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#define Z_BUFSIZE 16384
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enum program_mode {
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MODE_COMP,
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MODE_DECOMP,
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MODE_CAT
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} pmode;
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/*
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* exit codes for compress
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*/
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#define SUCCESS 0
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#define FAILURE 1
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#define WARNING 2
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extern char null_magic[];
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extern void *z_open(int, const char *, char *, int, u_int32_t, int);
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extern FILE *zopen(const char *, const char *,int);
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extern int zread(void *, char *, int);
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extern int zwrite(void *, const char *, int);
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extern int z_close(void *, struct z_info *, const char *, struct stat *);
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extern void *gz_open(int, const char *, char *, int, u_int32_t, int);
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extern int gz_read(void *, char *, int);
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extern int gz_write(void *, const char *, int);
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extern int gz_close(void *, struct z_info *, const char *, struct stat *);
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extern int gz_flush(void *, int);
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extern void *lzh_open(int, const char *, char *, int, u_int32_t, int);
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extern int lzh_read(void *, char *, int);
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extern int lzh_write(void *, const char *, int);
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extern int lzh_close(void *, struct z_info *);
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extern int lzh_flush(void *, int);
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extern void *null_open(int, const char *, char *, int, u_int32_t, int);
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extern int null_read(void *, char *, int);
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extern int null_write(void *, const char *, int);
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extern int null_close(void *, struct z_info *, const char *, struct stat *);
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extern int null_flush(void *, int);
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extern void setfile(const char *, int, struct stat *);
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