/*

 * Copyright (C) the libgit2 contributors. All rights reserved.

 *

 * This file is part of libgit2, distributed under the GNU GPL v2 with

 * a Linking Exception. For full terms see the included COPYING file.

 */

#ifndef INCLUDE_diff_generate_h__

#define INCLUDE_diff_generate_h__

enum {

	GIT_DIFFCAPS_HAS_SYMLINKS     = (1 << 0), /* symlinks on platform? */

	GIT_DIFFCAPS_IGNORE_STAT      = (1 << 1), /* use stat? */

	GIT_DIFFCAPS_TRUST_MODE_BITS  = (1 << 2), /* use st_mode? */

	GIT_DIFFCAPS_TRUST_CTIME      = (1 << 3), /* use st_ctime? */

	GIT_DIFFCAPS_USE_DEV          = (1 << 4), /* use st_dev? */

};

#define DIFF_FLAGS_KNOWN_BINARY (GIT_DIFF_FLAG_BINARY|GIT_DIFF_FLAG_NOT_BINARY)

#define DIFF_FLAGS_NOT_BINARY   (GIT_DIFF_FLAG_NOT_BINARY|GIT_DIFF_FLAG__NO_DATA)

enum {

	GIT_DIFF_FLAG__FREE_PATH  = (1 << 7),  /* `path` is allocated memory */

	GIT_DIFF_FLAG__FREE_DATA  = (1 << 8),  /* internal file data is allocated */

	GIT_DIFF_FLAG__UNMAP_DATA = (1 << 9),  /* internal file data is mmap'ed */

	GIT_DIFF_FLAG__NO_DATA    = (1 << 10), /* file data should not be loaded */

	GIT_DIFF_FLAG__FREE_BLOB  = (1 << 11), /* release the blob when done */

	GIT_DIFF_FLAG__LOADED     = (1 << 12), /* file data has been loaded */

	GIT_DIFF_FLAG__TO_DELETE  = (1 << 16), /* delete entry during rename det. */

	GIT_DIFF_FLAG__TO_SPLIT   = (1 << 17), /* split entry during rename det. */

	GIT_DIFF_FLAG__IS_RENAME_TARGET = (1 << 18),

	GIT_DIFF_FLAG__IS_RENAME_SOURCE = (1 << 19),

	GIT_DIFF_FLAG__HAS_SELF_SIMILARITY = (1 << 20),

};

#define GIT_DIFF_FLAG__CLEAR_INTERNAL(F) (F) = ((F) & 0x00FFFF)

#define GIT_DIFF__VERBOSE  (1 << 30)

extern void git_diff_addref(git_diff *diff);

extern bool git_diff_delta__should_skip(

	const git_diff_options *opts, const git_diff_delta *delta);

extern int git_diff__from_iterators(

	git_diff **diff_ptr,

	git_repository *repo,

	git_iterator *old_iter,

	git_iterator *new_iter,

	const git_diff_options *opts);

extern int git_diff__commit(

	git_diff **diff, git_repository *repo, const git_commit *commit, const git_diff_options *opts);

extern int git_diff__paired_foreach(

	git_diff *idx2head,

	git_diff *wd2idx,

	int (*cb)(git_diff_delta *i2h, git_diff_delta *w2i, void *payload),

	void *payload);

/* Merge two `git_diff`s according to the callback given by `cb`. */

typedef git_diff_delta *(*git_diff__merge_cb)(

	const git_diff_delta *left,

	const git_diff_delta *right,

	git_pool *pool);

extern int git_diff__merge(

	git_diff *onto, const git_diff *from, git_diff__merge_cb cb);

extern git_diff_delta *git_diff__merge_like_cgit(

	const git_diff_delta *a,

	const git_diff_delta *b,

	git_pool *pool);

/* Duplicate a `git_diff_delta` out of the `git_pool` */

extern git_diff_delta *git_diff__delta_dup(

	const git_diff_delta *d, git_pool *pool);

extern int git_diff__oid_for_file(

	git_oid *out,

	git_diff *diff,

	const char *path,

	uint16_t mode,

	git_off_t size);

extern int git_diff__oid_for_entry(

	git_oid *out,

	git_diff *diff,

	const git_index_entry *src,

	uint16_t mode,

	const git_oid *update_match);

/*

 * Sometimes a git_diff_file will have a zero size; this attempts to

 * fill in the size without loading the blob if possible.  If that is

 * not possible, then it will return the git_odb_object that had to be

 * loaded and the caller can use it or dispose of it as needed.

 */

GIT_INLINE(int) git_diff_file__resolve_zero_size(

	git_diff_file *file, git_odb_object **odb_obj, git_repository *repo)

{

	int error;

	git_odb *odb;

	size_t len;

	git_otype type;

	if ((error = git_repository_odb(&odb, repo)) < 0)

		return error;

	error = git_odb__read_header_or_object(

		odb_obj, &len, &type, odb, &file->id);

	git_odb_free(odb);

	if (!error)

		file->size = (git_off_t)len;

	return error;

}

#endif