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/*
* libfud
* Copyright 2024 Dominick Allen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FUD_STRING_HPP
#define FUD_STRING_HPP
#include "fud_status.hpp"
#include "fud_string_view.hpp"
#include "fud_utf8.hpp"
#include <climits>
#include <cstddef>
static_assert(CHAR_BIT == 8);
namespace fud {
constexpr size_t SSO_BUF_LENGTH = 15;
constexpr size_t SSO_BUF_SIZE = SSO_BUF_LENGTH + 1;
class String {
public:
String() = default;
explicit String(const utf8* cString);
explicit String(const char* cString);
String(const String& rhs);
String(String&& rhs) noexcept;
~String();
String& operator=(const String& rhs);
String& operator=(String&& rhs) noexcept;
[[nodiscard]] constexpr size_t length() const
{
return m_length;
}
[[nodiscard]] constexpr bool empty() const
{
return m_length == 0;
}
[[nodiscard]] constexpr size_t size() const
{
return m_length + 1;
}
[[nodiscard]] constexpr size_t capacity() const
{
return m_capacity - 1;
}
/** \brier The underlying data, guaranteed to have c string representation. */
[[nodiscard]] constexpr const utf8* data() const
{
return isLarge() ? m_data : m_buffer.data();
}
/** \brier The underlying data as an explicit c string. */
[[nodiscard]] inline const char* c_str() const
{
return isLarge() ? reinterpret_cast<const char*>(m_data) : reinterpret_cast<const char*>(m_buffer.data());
}
/** \brier The underlying data, guaranteed to have c string representation. */
[[nodiscard]] constexpr utf8* data()
{
return isLarge() ? m_data : m_buffer.data();
}
/** \brier The underlying data as an explicit c string. */
[[nodiscard]] inline char* c_str()
{
return isLarge() ? reinterpret_cast<char*>(m_data) : reinterpret_cast<char*>(m_buffer.data());
}
[[nodiscard]] bool nullTerminated() const;
[[nodiscard]] bool valid() const;
[[nodiscard]] bool utf8Valid() const;
FudStatus nullTerminate();
FudStatus reserve(size_t newCapacity);
[[nodiscard]] std::optional<utf8> back();
[[nodiscard]] constexpr size_t remainingLength() const
{
if (m_length >= m_capacity) {
return 0;
}
return m_capacity - 1U - m_length;
}
[[nodiscard]] inline StringView asView() const {
return StringView(*this);
}
FudStatus pushBack(char letter);
FudStatus pushBack(utf8 letter);
FudStatus pushBack(const FudUtf8& letter);
std::optional<utf8> pop();
FudStatus append(const char* source);
FudStatus append(const String& source);
FudStatus append(StringView source);
[[nodiscard]] String catenate(const String& rhs) const;
[[nodiscard]] String catenate(const char* rhs) const;
[[nodiscard]] bool compare(const String& rhs) const;
const utf8* begin() const;
const utf8* end() const;
private:
void cleanup();
FudStatus resize(size_t newCapacity);
using BufType = Array<utf8, SSO_BUF_SIZE>;
union {
BufType m_buffer{BufType::constFill(0)};
utf8* m_data;
};
size_t m_length{0};
size_t m_capacity{SSO_BUF_SIZE};
[[nodiscard]] constexpr bool isLarge() const
{
return m_capacity > SSO_BUF_SIZE;
}
};
} // namespace fud
#endif
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