/*

 * 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.

 */

#define GIT__WIN32_NO_WRAP_DIR

#include "posix.h"

git__DIR *git__opendir(const char *dir)

{

	git_win32_path filter_w;

	git__DIR *new = NULL;

	size_t dirlen, alloclen;

	if (!dir || !git_win32__findfirstfile_filter(filter_w, dir))

		return NULL;

	dirlen = strlen(dir);

	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, sizeof(*new), dirlen) ||

		GIT_ADD_SIZET_OVERFLOW(&alloclen, alloclen, 1) ||

		!(new = git__calloc(1, alloclen)))

		return NULL;

	memcpy(new->dir, dir, dirlen);

	new->h = FindFirstFileW(filter_w, &new->f);

	if (new->h == INVALID_HANDLE_VALUE) {

		giterr_set(GITERR_OS, "could not open directory '%s'", dir);

		git__free(new);

		return NULL;

	}

	new->first = 1;

	return new;

}

int git__readdir_ext(

	git__DIR *d,

	struct git__dirent *entry,

	struct git__dirent **result,

	int *is_dir)

{

	if (!d || !entry || !result || d->h == INVALID_HANDLE_VALUE)

		return -1;

	*result = NULL;

	if (d->first)

		d->first = 0;

	else if (!FindNextFileW(d->h, &d->f)) {

		if (GetLastError() == ERROR_NO_MORE_FILES)

			return 0;

		giterr_set(GITERR_OS, "could not read from directory '%s'", d->dir);

		return -1;

	}

	/* Convert the path to UTF-8 */

	if (git_win32_path_to_utf8(entry->d_name, d->f.cFileName) < 0)

		return -1;

	entry->d_ino = 0;

	*result = entry;

	if (is_dir != NULL)

		*is_dir = ((d->f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0);

	return 0;

}

struct git__dirent *git__readdir(git__DIR *d)

{

	struct git__dirent *result;

	if (git__readdir_ext(d, &d->entry, &result, NULL) < 0)

		return NULL;

	return result;

}

void git__rewinddir(git__DIR *d)

{

	git_win32_path filter_w;

	if (!d)

		return;

	if (d->h != INVALID_HANDLE_VALUE) {

		FindClose(d->h);

		d->h = INVALID_HANDLE_VALUE;

		d->first = 0;

	}

	if (!git_win32__findfirstfile_filter(filter_w, d->dir))

		return;

	d->h = FindFirstFileW(filter_w, &d->f);

	if (d->h == INVALID_HANDLE_VALUE)

		giterr_set(GITERR_OS, "could not open directory '%s'", d->dir);

	else

		d->first = 1;

}

int git__closedir(git__DIR *d)

{

	if (!d)

		return 0;

	if (d->h != INVALID_HANDLE_VALUE) {

		FindClose(d->h);

		d->h = INVALID_HANDLE_VALUE;

	}

	git__free(d);

	return 0;

}