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/* SPDX-License-Identifier: BSL-1.0 OR BSD-3-Clause */
#ifndef MPT_STRING_BUFFER_HPP
#define MPT_STRING_BUFFER_HPP
#include "mpt/base/detect.hpp"
#include "mpt/base/namespace.hpp"
#include "mpt/detect/mfc.hpp"
#include "mpt/string/types.hpp"
#include <algorithm>
#include <array>
#include <string>
#include <string_view>
#include <type_traits>
#include <cassert>
#include <cstddef>
#if MPT_DETECTED_MFC
// cppcheck-suppress missingInclude
#include <afx.h>
#endif // MPT_DETECTED_MFC
namespace mpt {
inline namespace MPT_INLINE_NS {
template <typename Tstring, typename Tchar>
class StringBufRefImpl {
private:
Tchar * buf;
std::size_t size;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
explicit StringBufRefImpl(Tchar * buf_, std::size_t size_)
: buf(buf_)
, size(size_) {
static_assert(sizeof(Tchar) == sizeof(typename Tstring::value_type));
assert(size > 0);
}
StringBufRefImpl(const StringBufRefImpl &) = delete;
StringBufRefImpl(StringBufRefImpl &&) = default;
StringBufRefImpl & operator=(const StringBufRefImpl &) = delete;
StringBufRefImpl & operator=(StringBufRefImpl &&) = delete;
operator Tstring() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return Tstring(buf, buf + len);
}
explicit operator std::basic_string_view<Tchar>() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return std::basic_string_view<Tchar>(buf, buf + len);
}
bool empty() const {
return buf[0] == Tchar('\0');
}
StringBufRefImpl & operator=(const Tstring & str) {
std::copy(str.data(), str.data() + std::min(str.length(), size - 1), buf);
std::fill(buf + std::min(str.length(), size - 1), buf + size, Tchar('\0'));
return *this;
}
};
template <typename Tstring, typename Tchar>
class StringBufRefImpl<Tstring, const Tchar> {
private:
const Tchar * buf;
std::size_t size;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
explicit StringBufRefImpl(const Tchar * buf_, std::size_t size_)
: buf(buf_)
, size(size_) {
static_assert(sizeof(Tchar) == sizeof(typename Tstring::value_type));
assert(size > 0);
}
StringBufRefImpl(const StringBufRefImpl &) = delete;
StringBufRefImpl(StringBufRefImpl &&) = default;
StringBufRefImpl & operator=(const StringBufRefImpl &) = delete;
StringBufRefImpl & operator=(StringBufRefImpl &&) = delete;
operator Tstring() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return Tstring(buf, buf + len);
}
explicit operator std::basic_string_view<Tchar>() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return std::basic_string_view<Tchar>(buf, len);
}
bool empty() const {
return buf[0] == Tchar('\0');
}
};
template <typename Tstring, typename Tchar, std::size_t size>
inline StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type> ReadTypedBuf(const std::array<Tchar, size> & buf) {
return StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type>(buf.data(), size);
}
template <typename Tstring, typename Tchar, std::size_t size>
inline StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type> ReadTypedBuf(const Tchar (&buf)[size]) {
return StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tstring, typename Tchar>
inline StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type> ReadTypedBuf(const Tchar * buf, std::size_t size) {
return StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tstring, typename Tchar, std::size_t size>
inline StringBufRefImpl<Tstring, Tchar> WriteTypedBuf(std::array<Tchar, size> & buf) {
return StringBufRefImpl<Tstring, Tchar>(buf.data(), size);
}
template <typename Tstring, typename Tchar, std::size_t size>
inline StringBufRefImpl<Tstring, Tchar> WriteTypedBuf(Tchar (&buf)[size]) {
return StringBufRefImpl<Tstring, Tchar>(buf, size);
}
template <typename Tstring, typename Tchar>
inline StringBufRefImpl<Tstring, Tchar> WriteTypedBuf(Tchar * buf, std::size_t size) {
return StringBufRefImpl<Tstring, Tchar>(buf, size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type> ReadAutoBuf(const std::array<Tchar, size> & buf) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type> ReadAutoBuf(const Tchar (&buf)[size]) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type> ReadAutoBuf(const Tchar * buf, std::size_t size) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar> WriteAutoBuf(std::array<Tchar, size> & buf) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar> WriteAutoBuf(Tchar (&buf)[size]) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar>(buf, size);
}
template <typename Tchar>
inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar> WriteAutoBuf(Tchar * buf, std::size_t size) {
return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar>(buf, size);
}
#if MPT_OS_WINDOWS
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type> ReadWinBuf(const std::array<Tchar, size> & buf) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type> ReadWinBuf(const Tchar (&buf)[size]) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type> ReadWinBuf(const Tchar * buf, std::size_t size) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar> WriteWinBuf(std::array<Tchar, size> & buf) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar> WriteWinBuf(Tchar (&buf)[size]) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar>(buf, size);
}
template <typename Tchar>
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar> WriteWinBuf(Tchar * buf, std::size_t size) {
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar>(buf, size);
}
#endif // MPT_OS_WINDOWS
#if MPT_DETECTED_MFC
template <typename Tchar>
class CStringBufRefImpl {
private:
Tchar * buf;
std::size_t size;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
explicit CStringBufRefImpl(Tchar * buf_, std::size_t size_)
: buf(buf_)
, size(size_) {
assert(size > 0);
}
CStringBufRefImpl(const CStringBufRefImpl &) = delete;
CStringBufRefImpl(CStringBufRefImpl &&) = default;
CStringBufRefImpl & operator=(const CStringBufRefImpl &) = delete;
CStringBufRefImpl & operator=(CStringBufRefImpl &&) = delete;
operator CString() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return CString(buf, mpt::saturate_cast<int>(len));
}
CStringBufRefImpl & operator=(const CString & str) {
std::copy(str.GetString(), str.GetString() + std::min(static_cast<std::size_t>(str.GetLength()), size - 1), buf);
std::fill(buf + std::min(static_cast<std::size_t>(str.GetLength()), size - 1), buf + size, Tchar('\0'));
return *this;
}
};
template <typename Tchar>
class CStringBufRefImpl<const Tchar> {
private:
const Tchar * buf;
std::size_t size;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
explicit CStringBufRefImpl(const Tchar * buf_, std::size_t size_)
: buf(buf_)
, size(size_) {
assert(size > 0);
}
CStringBufRefImpl(const CStringBufRefImpl &) = delete;
CStringBufRefImpl(CStringBufRefImpl &&) = default;
CStringBufRefImpl & operator=(const CStringBufRefImpl &) = delete;
CStringBufRefImpl & operator=(CStringBufRefImpl &&) = delete;
operator CString() const {
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
return CString(buf, mpt::saturate_cast<int>(len));
}
};
template <typename Tchar, std::size_t size>
inline CStringBufRefImpl<typename std::add_const<Tchar>::type> ReadCStringBuf(const std::array<Tchar, size> & buf) {
return CStringBufRefImpl<typename std::add_const<Tchar>::type>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline CStringBufRefImpl<typename std::add_const<Tchar>::type> ReadCStringBuf(const Tchar (&buf)[size]) {
return CStringBufRefImpl<typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar>
inline CStringBufRefImpl<typename std::add_const<Tchar>::type> ReadCStringBuf(const Tchar * buf, std::size_t size) {
return CStringBufRefImpl<typename std::add_const<Tchar>::type>(buf, size);
}
template <typename Tchar, std::size_t size>
inline CStringBufRefImpl<Tchar> WriteCStringBuf(std::array<Tchar, size> & buf) {
return CStringBufRefImpl<Tchar>(buf.data(), size);
}
template <typename Tchar, std::size_t size>
inline CStringBufRefImpl<Tchar> WriteCStringBuf(Tchar (&buf)[size]) {
return CStringBufRefImpl<Tchar>(buf, size);
}
template <typename Tchar>
inline CStringBufRefImpl<Tchar> WriteCStringBuf(Tchar * buf, std::size_t size) {
return CStringBufRefImpl<Tchar>(buf, size);
}
#endif // MPT_DETECTED_MFC
template <std::size_t len>
struct charbuf {
public:
using Tchar = char;
using char_type = Tchar;
using string_type = std::basic_string<Tchar>;
using string_view_type = std::basic_string_view<Tchar>;
constexpr std::size_t static_length() const {
return len;
}
public:
Tchar buf[len];
public:
charbuf() {
std::fill(std::begin(buf), std::end(buf), Tchar('\0'));
}
charbuf(const charbuf &) = default;
charbuf(charbuf &&) = default;
charbuf & operator=(const charbuf &) = default;
charbuf & operator=(charbuf &&) = default;
const Tchar & operator[](std::size_t i) const {
return buf[i];
}
std::string str() const {
return static_cast<std::string>(*this);
}
operator string_type() const {
return mpt::ReadAutoBuf(buf);
}
explicit operator string_view_type() const {
return static_cast<string_view_type>(mpt::ReadAutoBuf(buf));
}
bool empty() const {
return mpt::ReadAutoBuf(buf).empty();
}
charbuf & operator=(const string_type & str) {
mpt::WriteAutoBuf(buf) = str;
return *this;
}
public:
friend bool operator!=(const charbuf & a, const charbuf & b) {
return static_cast<string_view_type>(a) != static_cast<string_view_type>(b);
}
friend bool operator!=(const std::string & a, const charbuf & b) {
return a != static_cast<string_view_type>(b);
}
friend bool operator!=(const charbuf & a, const std::string & b) {
return static_cast<string_view_type>(a) != b;
}
friend bool operator==(const charbuf & a, const charbuf & b) {
return static_cast<string_view_type>(a) == static_cast<string_view_type>(b);
}
friend bool operator==(const std::string & a, const charbuf & b) {
return a == static_cast<string_view_type>(b);
}
friend bool operator==(const charbuf & a, const std::string & b) {
return static_cast<string_view_type>(a) == b;
}
};
} // namespace MPT_INLINE_NS
} // namespace mpt
#endif // MPT_STRING_BUFFER_HPP
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