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#ifndef PACKFILE_H
#define PACKFILE_H
/*
* Generate the filename to be used for a pack file with checksum "sha1" and
* extension "ext". The result is written into the strbuf "buf", overwriting
* any existing contents. A pointer to buf->buf is returned as a convenience.
*
* Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx"
*/
extern char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext);
/*
* Return the name of the (local) packfile with the specified sha1 in
* its name. The return value is a pointer to memory that is
* overwritten each time this function is called.
*/
extern char *sha1_pack_name(const unsigned char *sha1);
/*
* Return the name of the (local) pack index file with the specified
* sha1 in its name. The return value is a pointer to memory that is
* overwritten each time this function is called.
*/
extern char *sha1_pack_index_name(const unsigned char *sha1);
extern struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
/* A hook to report invalid files in pack directory */
#define PACKDIR_FILE_PACK 1
#define PACKDIR_FILE_IDX 2
#define PACKDIR_FILE_GARBAGE 4
extern void (*report_garbage)(unsigned seen_bits, const char *path);
extern void prepare_packed_git(void);
extern void reprepare_packed_git(void);
extern void install_packed_git(struct packed_git *pack);
/*
* Give a rough count of objects in the repository. This sacrifices accuracy
* for speed.
*/
unsigned long approximate_object_count(void);
extern void pack_report(void);
/*
* mmap the index file for the specified packfile (if it is not
* already mmapped). Return 0 on success.
*/
extern int open_pack_index(struct packed_git *);
/*
* munmap the index file for the specified packfile (if it is
* currently mmapped).
*/
extern void close_pack_index(struct packed_git *);
extern unsigned char *use_pack(struct packed_git *, struct pack_window **, off_t, unsigned long *);
extern void close_pack_windows(struct packed_git *);
extern void close_all_packs(void);
extern void unuse_pack(struct pack_window **);
extern void clear_delta_base_cache(void);
extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
/*
* Make sure that a pointer access into an mmap'd index file is within bounds,
* and can provide at least 8 bytes of data.
*
* Note that this is only necessary for variable-length segments of the file
* (like the 64-bit extended offset table), as we compare the size to the
* fixed-length parts when we open the file.
*/
extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
/*
* Return the SHA-1 of the nth object within the specified packfile.
* Open the index if it is not already open. The return value points
* at the SHA-1 within the mmapped index. Return NULL if there is an
* error.
*/
extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
/*
* Like nth_packed_object_sha1, but write the data into the object specified by
* the the first argument. Returns the first argument on success, and NULL on
* error.
*/
extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
/*
* Return the offset of the nth object within the specified packfile.
* The index must already be opened.
*/
extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
extern int unpack_object_header(struct packed_git *, struct pack_window **, off_t *, unsigned long *);
extern void release_pack_memory(size_t);
extern int open_packed_git(struct packed_git *p);
/* global flag to enable extra checks when accessing packed objects */
extern int do_check_packed_object_crc;
extern int packed_object_info(struct packed_git *pack, off_t offset, struct object_info *);
extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1);
extern const struct packed_git *has_packed_and_bad(const unsigned char *sha1);
#endif
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