/*
 * 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_git_utfconv_h__
#define INCLUDE_git_utfconv_h__

#include <wchar.h>
#include "common.h"

#ifndef WC_ERR_INVALID_CHARS
# define WC_ERR_INVALID_CHARS	0x80
#endif

/**
 * Converts a UTF-8 string to wide characters.
 *
 * @param dest The buffer to receive the wide string.
 * @param dest_size The size of the buffer, in characters.
 * @param src The UTF-8 string to convert.
 * @return The length of the wide string, in characters (not counting the NULL terminator), or < 0 for failure
 */
int git__utf8_to_16(wchar_t *dest, size_t dest_size, const char *src);

/**
 * Converts a wide string to UTF-8.
 *
 * @param dest The buffer to receive the UTF-8 string.
 * @param dest_size The size of the buffer, in bytes.
 * @param src The wide string to convert.
 * @return The length of the UTF-8 string, in bytes (not counting the NULL terminator), or < 0 for failure
 */
int git__utf16_to_8(char *dest, size_t dest_size, const wchar_t *src);

/**
 * Converts a UTF-8 string to wide characters.
 * Memory is allocated to hold the converted string.
 * The caller is responsible for freeing the string with git__free.
 *
 * @param dest Receives a pointer to the wide string.
 * @param src The UTF-8 string to convert.
 * @return The length of the wide string, in characters (not counting the NULL terminator), or < 0 for failure
 */
int git__utf8_to_16_alloc(wchar_t **dest, const char *src);

/**
 * Converts a wide string to UTF-8.
 * Memory is allocated to hold the converted string.
 * The caller is responsible for freeing the string with git__free.
 *
 * @param dest Receives a pointer to the UTF-8 string.
 * @param src The wide string to convert.
 * @return The length of the UTF-8 string, in bytes (not counting the NULL terminator), or < 0 for failure
 */
int git__utf16_to_8_alloc(char **dest, const wchar_t *src);

#endif