// Copyright (c) 2016-2017 JSTP project authors. Use of this source code is
// governed by the MIT license that can be found in the LICENSE file.
// Copyright (c) 2018 mdsf project authors. Use of this source code is
// governed by the MIT license that can be found in the LICENSE file.

#ifndef SRC_UNICODE_UTILS_H_
#define SRC_UNICODE_UTILS_H_

#include <cstddef>
#include <cstdint>

namespace mdsf {

namespace unicode_utils {

// Returns true if `str` points to a valid Line Terminator Sequence code point,
// false otherwise. `size` will receive the number of bytes used by this
// code point (1, 2, 3).
bool IsLineTerminatorSequence(const char* str, std::size_t* size);

// Returns true if `str` points to a valid White space code point,
// false otherwise. `size` will receive the number of bytes used by this
// code point (1, 2, 3).
bool IsWhiteSpaceCharacter(const char* str, std::size_t* size);

// Encodes a Unicode code point in UTF-8 and writes it to `write_to`.
// `size` will receive the number of bytes used (1, 2, 3 or 4).
void CodePointToUtf8(unsigned int c, std::size_t* size, char* write_to);

// Decodes a UTF-8 encoded Unicode code point starting at the `begin`.
// `size` will receive the number of bytes the code point occupies.
std::uint32_t Utf8ToCodePoint(const char* begin, std::size_t* size);

// Checks whether the given Unicode code point is a valid IdentifierStart.
bool IsIdStartCodePoint(std::uint32_t cp);

// Checks whether the given Unicode code point is a valid IdentifierPart.
bool IsIdPartCodePoint(std::uint32_t cp);

}  // namespace unicode_utils

}  // namespace mdsf

#endif  // SRC_UNICODE_UTILS_H_