libddwaf-src 2.1.0

// Unless explicitly stated otherwise all files in this repository are
// dual-licensed under the Apache-2.0 License or BSD-3-Clause License.
//
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2022 Datadog, Inc.

#pragma once

#include "cow_string.hpp"
#include <cstddef>
#include <cstdint>

namespace ddwaf::utf8 {

constexpr uint32_t UTF8_MAX_CODEPOINT = 0x10FFFF;
constexpr uint32_t UTF8_INVALID = 0xFFFFFFFF;
constexpr uint32_t UTF8_EOF = 0xFFFFFFFE;

uint8_t codepoint_to_bytes(uint32_t codepoint, char *utf8_buffer);
uint8_t write_codepoint(uint32_t codepoint, char *utf8Buffer, uint64_t lengthLeft);

uint32_t fetch_next_codepoint(const char *utf8Buffer, uint64_t &position, uint64_t length);

size_t normalize_codepoint(uint32_t codepoint, int32_t *wbBuffer, size_t wbBufferLength);

bool normalize_string(cow_string &str);

} // namespace ddwaf::utf8