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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_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);
~String();
String& operator=(const String& rhs);
String& operator=(String&& rhs);
[[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;
[[nodiscard]] FudStatus nullTerminate();
[[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]] FudStatus pushBack(char letter);
[[nodiscard]] FudStatus pushBack(utf8 letter);
[[nodiscard]] FudStatus pushBack(const FudUtf8& letter);
std::optional<utf8> pop();
[[nodiscard]] FudStatus catenate(StringView source);
[[nodiscard]] String append(const String& rhs) const;
const utf8* begin() const;
const utf8* end() const;
private:
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;
}
};
class StringView {
public:
constexpr StringView() noexcept : m_length(0), m_data{nullptr}
{
}
constexpr StringView(size_t strLen, const utf8* strData) : m_length(strLen), m_data{strData}
{
}
StringView(size_t strLen, const char* strData) :
m_length(strLen), // line break
m_data{reinterpret_cast<const utf8*>(strData)} // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
{
}
explicit constexpr StringView(const StringView& view) noexcept = default;
explicit constexpr StringView(const String& fudString) noexcept : StringView(fudString.length(), fudString.data())
{
}
[[nodiscard]] constexpr size_t length() const
{
return m_length;
}
[[nodiscard]] constexpr const utf8* data() const
{
return m_data;
}
[[nodiscard]] bool nullTerminated() const;
[[nodiscard]] bool utf8Valid() const;
Result<size_t, FudStatus> skipWhitespace();
Result<size_t, FudStatus> trimWhitespace();
FudStatus toUint8(uint8_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toUint16(uint16_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toUint32(uint32_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toUint64(uint64_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toInt8(int8_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toInt16(int16_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toInt32(int32_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toInt64(int64_t& number, uint8_t specifiedRadix, size_t& strLen) const;
FudStatus toFloat(float& number, size_t& strLen) const;
FudStatus toDouble(double& number, size_t& strLen) const;
private:
size_t m_length;
const utf8* m_data;
};
FudStatus skipWhitespace(StringView& view, size_t& skipIndex);
ssize_t cStringLength(const char* str);
ssize_t cStringLength(const char* str, size_t maxLength);
} // namespace fud
#endif
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