1*96dc1bb7Stedu /* $OpenBSD: compress.h,v 1.1 2016/09/03 13:05:08 tedu Exp $ */ 2*96dc1bb7Stedu 3*96dc1bb7Stedu /* 4*96dc1bb7Stedu * Copyright (c) 1997 Michael Shalayeff 5*96dc1bb7Stedu * All rights reserved. 6*96dc1bb7Stedu * 7*96dc1bb7Stedu * Redistribution and use in source and binary forms, with or without 8*96dc1bb7Stedu * modification, are permitted provided that the following conditions 9*96dc1bb7Stedu * are met: 10*96dc1bb7Stedu * 1. Redistributions of source code must retain the above copyright 11*96dc1bb7Stedu * notice, this list of conditions and the following disclaimer. 12*96dc1bb7Stedu * 2. Redistributions in binary form must reproduce the above copyright 13*96dc1bb7Stedu * notice, this list of conditions and the following disclaimer in the 14*96dc1bb7Stedu * documentation and/or other materials provided with the distribution. 15*96dc1bb7Stedu * 16*96dc1bb7Stedu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17*96dc1bb7Stedu * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18*96dc1bb7Stedu * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*96dc1bb7Stedu * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20*96dc1bb7Stedu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*96dc1bb7Stedu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*96dc1bb7Stedu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*96dc1bb7Stedu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*96dc1bb7Stedu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*96dc1bb7Stedu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*96dc1bb7Stedu * SUCH DAMAGE. 27*96dc1bb7Stedu * 28*96dc1bb7Stedu */ 29*96dc1bb7Stedu 30*96dc1bb7Stedu #include <sys/stat.h> 31*96dc1bb7Stedu 32*96dc1bb7Stedu struct z_info { 33*96dc1bb7Stedu u_int32_t mtime; /* timestamp */ 34*96dc1bb7Stedu u_int32_t crc; /* crc */ 35*96dc1bb7Stedu u_int32_t hlen; /* header length */ 36*96dc1bb7Stedu u_int64_t total_in; /* # bytes in */ 37*96dc1bb7Stedu u_int64_t total_out; /* # bytes out */ 38*96dc1bb7Stedu }; 39*96dc1bb7Stedu 40*96dc1bb7Stedu /* 41*96dc1bb7Stedu * making it any bigger does not affect perfomance very much. 42*96dc1bb7Stedu * actually this value is just a little bit better than 8192. 43*96dc1bb7Stedu */ 44*96dc1bb7Stedu #define Z_BUFSIZE 16384 45*96dc1bb7Stedu 46*96dc1bb7Stedu enum program_mode { 47*96dc1bb7Stedu MODE_COMP, 48*96dc1bb7Stedu MODE_DECOMP, 49*96dc1bb7Stedu MODE_CAT 50*96dc1bb7Stedu } pmode; 51*96dc1bb7Stedu 52*96dc1bb7Stedu /* 53*96dc1bb7Stedu * exit codes for compress 54*96dc1bb7Stedu */ 55*96dc1bb7Stedu #define SUCCESS 0 56*96dc1bb7Stedu #define FAILURE 1 57*96dc1bb7Stedu #define WARNING 2 58*96dc1bb7Stedu 59*96dc1bb7Stedu extern char null_magic[]; 60*96dc1bb7Stedu 61*96dc1bb7Stedu extern void *z_open(int, const char *, char *, int, u_int32_t, int); 62*96dc1bb7Stedu extern FILE *zopen(const char *, const char *,int); 63*96dc1bb7Stedu extern int zread(void *, char *, int); 64*96dc1bb7Stedu extern int zwrite(void *, const char *, int); 65*96dc1bb7Stedu extern int z_close(void *, struct z_info *, const char *, struct stat *); 66*96dc1bb7Stedu 67*96dc1bb7Stedu 68*96dc1bb7Stedu extern void *gz_open(int, const char *, char *, int, u_int32_t, int); 69*96dc1bb7Stedu extern int gz_read(void *, char *, int); 70*96dc1bb7Stedu extern int gz_write(void *, const char *, int); 71*96dc1bb7Stedu extern int gz_close(void *, struct z_info *, const char *, struct stat *); 72*96dc1bb7Stedu extern int gz_flush(void *, int); 73*96dc1bb7Stedu 74*96dc1bb7Stedu extern void *lzh_open(int, const char *, char *, int, u_int32_t, int); 75*96dc1bb7Stedu extern int lzh_read(void *, char *, int); 76*96dc1bb7Stedu extern int lzh_write(void *, const char *, int); 77*96dc1bb7Stedu extern int lzh_close(void *, struct z_info *); 78*96dc1bb7Stedu extern int lzh_flush(void *, int); 79*96dc1bb7Stedu 80*96dc1bb7Stedu extern void *null_open(int, const char *, char *, int, u_int32_t, int); 81*96dc1bb7Stedu extern int null_read(void *, char *, int); 82*96dc1bb7Stedu extern int null_write(void *, const char *, int); 83*96dc1bb7Stedu extern int null_close(void *, struct z_info *, const char *, struct stat *); 84*96dc1bb7Stedu extern int null_flush(void *, int); 85*96dc1bb7Stedu 86*96dc1bb7Stedu extern void setfile(const char *, int, struct stat *); 87