typedef struct git_diff git_diff;

typedef enum {

GIT_DELTA_UNMODIFIED = 0,

GIT_DELTA_ADDED = 1,

GIT_DELTA_DELETED = 2,

GIT_DELTA_MODIFIED = 3,

GIT_DELTA_RENAMED = 4,

GIT_DELTA_COPIED = 5,

GIT_DELTA_IGNORED = 6,

GIT_DELTA_UNTRACKED = 7,

GIT_DELTA_TYPECHANGE = 8,

GIT_DELTA_UNREADABLE = 9,

GIT_DELTA_CONFLICTED = 10,

} git_delta_t;

typedef struct {

git_oid id;

const char *path;

git_off_t size;

uint32_t flags;

uint16_t mode;

uint16_t id_abbrev;

} git_diff_file;

typedef struct {

git_delta_t status;

uint32_t flags;

uint16_t similarity;

uint16_t nfiles;

git_diff_file old_file;

git_diff_file new_file;

} git_diff_delta;

typedef int (*git_diff_notify_cb)(

const git_diff *diff_so_far,

const git_diff_delta *delta_to_add,

const char *matched_pathspec,

void *payload);

typedef int (*git_diff_progress_cb)(

const git_diff *diff_so_far,

const char *old_path,

const char *new_path,

void *payload);

typedef struct {

unsigned int version;

uint32_t flags;

git_submodule_ignore_t ignore_submodules;

git_strarray pathspec;

git_diff_notify_cb notify_cb;

git_diff_progress_cb progress_cb;

void *payload;

uint32_t context_lines;

uint32_t interhunk_lines;

uint16_t id_abbrev;

git_off_t max_size;

const char *old_prefix;

const char *new_prefix;

} git_diff_options;

int git_diff_init_options(

git_diff_options *opts,

unsigned int version);

typedef struct {

int (*file_signature)(

void **out, const git_diff_file *file,

const char *fullpath, void *payload);

int (*buffer_signature)(

void **out, const git_diff_file *file,

const char *buf, size_t buflen, void *payload);

void (*free_signature)(void *sig, void *payload);

int (*similarity)(int *score, void *siga, void *sigb, void *payload);

void *payload;

} git_diff_similarity_metric;

int git_diff_tree_to_index(

git_diff **diff,

git_repository *repo,

git_tree *old_tree,

git_index *index,

const git_diff_options *opts);

int git_diff_index_to_workdir(

git_diff **diff,

git_repository *repo,

git_index *index,

const git_diff_options *opts);