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/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* 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_h__
#define INCLUDE_diff_h__
#include <stdio.h>
#include "vector.h"
#include "buffer.h"
#include "iterator.h"
#include "repository.h"
#include "pool.h"
#define DIFF_OLD_PREFIX_DEFAULT "a/"
#define DIFF_NEW_PREFIX_DEFAULT "b/"
enum {
GIT_DIFFCAPS_HAS_SYMLINKS = (1 << 0), /* symlinks on platform? */
GIT_DIFFCAPS_ASSUME_UNCHANGED = (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 MAX_DIFF_FILESIZE 0x20000000
struct git_diff_list {
git_refcount rc;
git_repository *repo;
git_diff_options opts;
git_vector pathspec;
git_vector deltas; /* vector of git_diff_file_delta */
git_pool pool;
git_iterator_type_t old_src;
git_iterator_type_t new_src;
uint32_t diffcaps;
};
extern void git_diff__cleanup_modes(
uint32_t diffcaps, uint32_t *omode, uint32_t *nmode);
/**
* Return the maximum possible number of files in the diff.
*
* NOTE: This number has to be treated as an upper bound on the number of
* files that have changed if the diff is with the working directory.
*
* Why?! For efficiency, we defer loading the file contents as long as
* possible, so if a file has been "touched" in the working directory and
* then reverted to the original content, it may get stored in the diff list
* as MODIFIED along with a flag that the status should be reconfirmed when
* it is actually loaded into memory. When that load happens, it could get
* flipped to UNMODIFIED. If unmodified files are being skipped, then the
* iterator will skip that file and this number may be too high.
*
* This behavior is true of `git_diff_foreach` as well, but the only
* implication there is that the `progress` value would not advance evenly.
*
* @param iterator The iterator object
* @return The maximum number of files to be iterated over
*/
int git_diff_iterator__max_files(git_diff_iterator *iterator);
#endif
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