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#include <cppgit2/repository.hpp>

#include <functional>

namespace cppgit2 {

index::index() : c_ptr_(nullptr), owner_(ownership::user) {

git_index_new(&c_ptr_); // owned by user

}

index::index(git_index *c_ptr, ownership owner)

: c_ptr_(c_ptr), owner_(owner) {}

index::~index() {

if (c_ptr_ && owner_ == ownership::user)

git_index_free(c_ptr_);

}

void index::add_entry(const entry &source_entry) {

if (git_index_add(c_ptr_, source_entry.c_ptr()))

throw git_exception();

}

void index::add_entries_that_match(

const std::vector<std::string> &pathspec, add_option flags,

std::function<int(const std::string &, const std::string &)> callback) {

struct callback_wrapper {

std::function<int(const std::string &, const std::string &)> fn;

};

callback_wrapper wrapper;

wrapper.fn = callback;

auto callback_c = [](const char *pathspec, const char *matched_pathspec,

void *payload) {

auto wrapper = reinterpret_cast<callback_wrapper *>(payload);

return wrapper->fn(pathspec, matched_pathspec);

};

auto pathspec_c = strarray(pathspec).c_ptr();

if (git_index_add_all(c_ptr_, pathspec_c, static_cast<int>(flags), callback_c,

(void *)(&wrapper)))

throw git_exception();

}

void index::add_entry_by_path(const std::string &path) {

if (git_index_add_bypath(c_ptr_, path.c_str()))

throw git_exception();

}

void index::add_entry_from_buffer(const entry &entry,

const std::string &buffer) {

if (git_index_add_frombuffer(c_ptr_, entry.c_ptr(), buffer.c_str(),

buffer.size()))

throw git_exception();

}

index::capability index::capability_flags() const {

return static_cast<capability>(git_index_caps(c_ptr_));

}

const oid index::checksum() { return oid(git_index_checksum(c_ptr_)); }

void index::clear() {

if (git_index_clear(c_ptr_))

throw git_exception();

}

void index::add_conflict_entry(const entry &ancestor_entry,

const entry &our_entry,

const entry &their_entry) {

if (git_index_conflict_add(c_ptr_, ancestor_entry.c_ptr(), our_entry.c_ptr(),

their_entry.c_ptr()))

throw git_exception();

}

void index::remove_all_conflicts() {

if (git_index_conflict_cleanup(c_ptr_))

throw git_exception();

}

void index::remove_conflict_entries(const std::string &path) {

if (git_index_conflict_remove(c_ptr_, path.c_str()))

throw git_exception();

}

size_t index::size() const { return git_index_entrycount(c_ptr_); }

size_t index::find_first(const std::string &path) {

size_t result{0};

if (git_index_find(&result, c_ptr_, path.c_str()))

throw git_exception();

return result;

}

size_t index::find_first_matching_prefix(const std::string &prefix) {

size_t result{0};

if (git_index_find_prefix(&result, c_ptr_, prefix.c_str()))

throw git_exception();

return result;

}

void index::for_each(std::function<void(const index::entry &)> visitor) {

git_index_iterator *iter;

git_index_iterator_new(&iter, c_ptr_);

const git_index_entry *entry_c;

int ret;

while ((ret = git_index_iterator_next(&entry_c, iter)) == 0) {

entry payload(nullptr);

*(payload.c_ptr_) = *(entry_c);

visitor(payload);

}

git_index_iterator_free(iter);

}

void index::for_each_conflict(

std::function<void(const entry &, const entry &, const entry &)> visitor) {

git_index_conflict_iterator *iter;

git_index_conflict_iterator_new(&iter, c_ptr_);

const git_index_entry *ancestor_out, *our_out, *their_out;

int ret;

while ((ret = git_index_conflict_next(&ancestor_out, &our_out, &their_out,

iter)) == 0) {

entry ancestor_payload(nullptr), our_payload(nullptr),

their_payload(nullptr);

*(ancestor_payload.c_ptr_) = *(ancestor_out);

*(our_payload.c_ptr_) = *(our_out);

*(their_payload.c_ptr_) = *(their_out);

visitor(ancestor_payload, our_payload, their_payload);

}

git_index_conflict_iterator_free(iter);

}

const index::entry index::operator[](size_t index) {

auto ret = git_index_get_byindex(c_ptr_, index);

if (!ret)

throw git_exception();

entry result(nullptr);

if (ret)

*(result.c_ptr_) = *ret;

return result;

}

const index::entry index::entry_in_path(const std::string &path, stage s) {

auto ret = git_index_get_bypath(c_ptr_, path.c_str(), static_cast<int>(s));

if (!ret)

throw git_exception();

entry result(nullptr);

*(result.c_ptr_) = *ret;

return result;

}

bool index::has_conflicts() const { return git_index_has_conflicts(c_ptr_); }

std::string index::path() const {

auto ret = git_index_path(c_ptr_);

if (ret)

return std::string(ret);

else

return "";

}

void index::read(bool force) {

if (git_index_read(c_ptr_, force))

throw git_exception();

}

void index::read_tree(const tree &tree) {

if (git_index_read_tree(c_ptr_, tree.c_ptr()))

throw git_exception();

}

void index::remove_entry(const std::string &path, index::stage stage) {

if (git_index_remove(c_ptr_, path.c_str(), static_cast<int>(stage)))

throw git_exception();

}

void index::remove_entries_that_match(

const std::vector<std::string> &pathspec,

std::function<int(const std::string &, const std::string &)> callback) {

struct callback_wrapper {

std::function<int(const std::string &, const std::string &)> fn;

};

callback_wrapper wrapper;

wrapper.fn = callback;

auto callback_c = [](const char *pathspec, const char *matched_pathspec,

void *payload) {

auto wrapper = reinterpret_cast<callback_wrapper *>(payload);

return wrapper->fn(pathspec, matched_pathspec);

};

auto pathspec_c = strarray(pathspec).c_ptr();

if (git_index_remove_all(c_ptr_, pathspec_c, callback_c, (void *)(&wrapper)))

throw git_exception();

}

void index::remove_entry_by_path(const std::string &path) {

if (git_index_remove_bypath(c_ptr_, path.c_str()))

throw git_exception();

}

void index::remove_entries_in_directory(const std::string &dir, stage stage) {

if (git_index_remove_directory(c_ptr_, dir.c_str(), static_cast<int>(stage)))

throw git_exception();

}

void index::set_index_capabilities(capability caps) {

if (git_index_set_caps(c_ptr_, static_cast<int>(caps)))

throw git_exception();

}

void index::set_version(unsigned int version) {

if (git_index_set_version(c_ptr_, version))

throw git_exception();

}

void index::update_entries_that_match(

const std::vector<std::string> &pathspec,

std::function<int(const std::string &, const std::string &)> callback) {

struct callback_wrapper {

std::function<int(const std::string &, const std::string &)> fn;

};

callback_wrapper wrapper;

wrapper.fn = callback;

auto callback_c = [](const char *pathspec, const char *matched_pathspec,

void *payload) {

auto wrapper = reinterpret_cast<callback_wrapper *>(payload);

return wrapper->fn(pathspec, matched_pathspec);

};

auto pathspec_c = strarray(pathspec).c_ptr();

if (git_index_update_all(c_ptr_, pathspec_c, callback_c, (void *)(&wrapper)))

throw git_exception();

}

unsigned int index::version() const { return git_index_version(c_ptr_); }

void index::write() {

if (git_index_write(c_ptr_))

throw git_exception();

}

oid index::write_tree() {

oid result;

if (git_index_write_tree(result.c_ptr(), c_ptr_))

throw git_exception();

return result;

}

oid index::write_tree_to(const repository &repo) {

oid result;

if (git_index_write_tree_to(result.c_ptr(), c_ptr_, repo.c_ptr_))

throw git_exception();

return result;

}

index index::open(const std::string &path) {

index result(nullptr, ownership::user);

if (git_index_open(&result.c_ptr_, path.c_str()))

throw git_exception();

return result;

}

repository index::owner() const { return repository(git_index_owner(c_ptr_)); }

const git_index *index::c_ptr() const { return c_ptr_; }

} // namespace cppgit2

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