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/*
* Copyright (c) 2005 Michael Schroeder (mls@suse.de)
*
* This program is licensed under the BSD license, read LICENSE.BSD
* for further information
*/
#include <zlib.h>
#include <bzlib.h>
#include <lzma.h>
struct cfile {
int fd;
void *fp;
int comp;
int level;
size_t len;
unsigned char buf[4096];
int bufN;
int eof;
void *ctx;
void (*ctxup)(void *, unsigned char *, unsigned int);
unsigned int crc;
unsigned int crclen;
size_t bytes;
int nunread;
unsigned char *unreadbuf;
union {
bz_stream bz;
z_stream gz;
lzma_stream lz;
} strm;
int (*read)(struct cfile *f, void *buf, int len);
int (*write)(struct cfile *f, void *buf, int len);
int (*close)(struct cfile *f);
int (*unread)(struct cfile *f, void *buf, int len);
int (*oldread)(struct cfile *f, void *buf, int len);
};
typedef void (*cfile_ctxup)(void *, unsigned char *, unsigned int);
#define CFILE_IO_FILE (-2)
#define CFILE_IO_CFILE (-3)
#define CFILE_IO_BUFFER (-4)
#define CFILE_IO_ALLOC (-5)
#define CFILE_IO_NULL (-6)
#define CFILE_IO_REOPEN (-99)
#define CFILE_IO_PUSHBACK (-100) /* internal */
#define CFILE_COMP_XX (255)
#define CFILE_COMP_UN (0)
#define CFILE_COMP_GZ (1)
#define CFILE_COMP_BZ_20 (2)
#define CFILE_COMP_GZ_RSYNC (3)
#define CFILE_COMP_BZ_17 (4)
#define CFILE_COMP_LZMA (5)
#define CFILE_COMP_XZ (6)
#define CFILE_COMP_BZ CFILE_COMP_BZ_20
#define CFILE_MKCOMP(comp, level) ((comp) | ((level) << 8))
#define CFILE_COMPALGO(comp) ((comp) & 255)
#define CFILE_COMPLEVEL(comp) ((comp) >> 8 & 255)
#define CFILE_OPEN_RD ('r')
#define CFILE_OPEN_WR ('w')
#define CFILE_LEN_UNLIMITED ((size_t)-1)
#define CFILE_UNREAD_GET_LEN (-2)
#define CFILE_COPY_CLOSE_IN (1 << 0)
#define CFILE_COPY_CLOSE_OUT (1 << 1)
#define CFILE_COPY_CLOSE_INOUT (CFILE_COPY_CLOSE_IN|CFILE_COPY_CLOSE_OUT)
#define CFILE_UNREAD_GETBYTES (-2)
struct cfile *cfile_open(int mode, int fd, void *fp, int comp, size_t len, void (*ctxup)(void *, unsigned char *, unsigned int), void *ctx);
int cfile_copy(struct cfile *in, struct cfile *out, int flags);
int cfile_detect_rsync(struct cfile *f);
char *cfile_comp2str(int comp);
int cfile_setlevel(int comp, int level);
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