#ifndef _INCL_VCDIFF_H_

#define _INCL_VCDIFF_H_

#include <stdio.h>

#ifdef _MSC_VER

#define inline _inline

typedef unsigned char uint8;

typedef unsigned int uint32;

typedef __int64 int64;

#else

#include <stdint.h>

typedef uint8_t uint8;

typedef uint32_t uint32;

typedef int64_t int64;

#endif

/*

* These allocators work just like the C runtime's malloc() and free()

* (in fact, they probably use malloc() and free() internally if you don't

* specify your own allocator, but don't rely on that behaviour).

* (data) is the pointer you supplied when specifying these allocator

* callbacks, in case you need instance-specific data...it is passed through

* to your allocator unmolested, and can be NULL if you like.

*/

typedef void *(*vcdiff_malloc)(int bytes, void *data);

typedef void (*vcdiff_free)(void *ptr, void *data);

/*

* If you need more fined-grained control over i/o than you get from

* filenames, you can use these abstracted i/o intefaces with

* vcdiff() instead of vcdiff_fname().

*/

typedef struct

{

int64 (*read)(void *ctx, void *buf, uint32 n);

int64 (*write)(void *ctx, void *buf, uint32 n);

int64 (*seek)(void *ctx, uint64 n);

void *ctx;

} vcdiff_io;

/* !!! FIXME: documentation. */

/*

*(iosrc) and (iodelta) need read access, (iodst) needs read

* AND write access. All three streams must be seekable!

*/

int vcdiff(vcdiff_io *iosrc, vcdiff_io *iodelta, vcdiff_io *iodst,

vcdiff_malloc m, vcdiff_free f, void *d);

/* !!! FIXME: documentation. */

/*

*(fiosrc) and (fiodelta) need read access, (fiodst) needs read

* AND write access. All three streams must be seekable!

*/

int vcdiff_stdio(FILE *fiosrc, FILE *fiodelta, FILE *fiodst,

vcdiff_malloc m, vcdiff_free f, void *d);

/* !!! FIXME: documentation. */

/*

*(src) and (delta) need read access, (dst) needs read

* AND write access. All three streams must be seekable!

*/

int vcdiff_fname(const char *src, const char *delta, const char *dst,

vcdiff_malloc m, vcdiff_free f, void *d);

#endif /* include-once blocker. */

/* end of vcdiff.h ... */