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/*
* mptStringBuffer.h
* -----------------
* Purpose: Various functions for "fixing" char array strings for writing to or
* reading from module files, or for securing char arrays in general.
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#pragma once
#include "openmpt/all/BuildSettings.hpp"
#include "mpt/string/buffer.hpp"
#include "mptString.h"
#include <algorithm>
#include <string>
#include <vector>
OPENMPT_NAMESPACE_BEGIN
namespace mpt
{
namespace String
{
enum ReadWriteMode : uint8
{
// Reading / Writing: Standard null-terminated string handling.
nullTerminated = 1,
// Reading: Source string is not guaranteed to be null-terminated (if it fills the whole char array).
// Writing: Destination string is not guaranteed to be null-terminated (if it fills the whole char array).
maybeNullTerminated = 2,
// Reading: String may contain null characters anywhere. They should be treated as spaces.
// Writing: A space-padded string is written.
spacePadded = 3,
// Reading: String may contain null characters anywhere. The last character is ignored (it is supposed to be 0).
// Writing: A space-padded string with a trailing null is written.
spacePaddedNull = 4,
};
namespace detail
{
std::string ReadStringBuffer(String::ReadWriteMode mode, const char *srcBuffer, std::size_t srcSize);
void WriteStringBuffer(String::ReadWriteMode mode, char *destBuffer, const std::size_t destSize, const char *srcBuffer, const std::size_t srcSize);
} // namespace detail
} // namespace String
namespace String {
using mpt::ReadTypedBuf;
using mpt::WriteTypedBuf;
} // namespace String
namespace String {
using mpt::ReadAutoBuf;
using mpt::WriteAutoBuf;
} // namespace String
template <typename Tchar>
class StringModeBufRefImpl
{
private:
Tchar * buf;
std::size_t size;
String::ReadWriteMode mode;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
StringModeBufRefImpl(Tchar * buf_, std::size_t size_, String::ReadWriteMode mode_)
: buf(buf_)
, size(size_)
, mode(mode_)
{
static_assert(sizeof(Tchar) == 1);
}
StringModeBufRefImpl(const StringModeBufRefImpl &) = delete;
StringModeBufRefImpl(StringModeBufRefImpl &&) = default;
StringModeBufRefImpl & operator = (const StringModeBufRefImpl &) = delete;
StringModeBufRefImpl & operator = (StringModeBufRefImpl &&) = delete;
operator std::string () const
{
return String::detail::ReadStringBuffer(mode, buf, size);
}
bool empty() const
{
return String::detail::ReadStringBuffer(mode, buf, size).empty();
}
StringModeBufRefImpl & operator = (const std::string & str)
{
String::detail::WriteStringBuffer(mode, buf, size, str.data(), str.size());
return *this;
}
};
template <typename Tchar>
class StringModeBufRefImpl<const Tchar>
{
private:
const Tchar * buf;
std::size_t size;
String::ReadWriteMode mode;
public:
// cppcheck false-positive
// cppcheck-suppress uninitMemberVar
StringModeBufRefImpl(const Tchar * buf_, std::size_t size_, String::ReadWriteMode mode_)
: buf(buf_)
, size(size_)
, mode(mode_)
{
static_assert(sizeof(Tchar) == 1);
}
StringModeBufRefImpl(const StringModeBufRefImpl &) = delete;
StringModeBufRefImpl(StringModeBufRefImpl &&) = default;
StringModeBufRefImpl & operator = (const StringModeBufRefImpl &) = delete;
StringModeBufRefImpl & operator = (StringModeBufRefImpl &&) = delete;
operator std::string () const
{
return String::detail::ReadStringBuffer(mode, buf, size);
}
bool empty() const
{
return String::detail::ReadStringBuffer(mode, buf, size).empty();
}
};
namespace String {
template <typename Tchar, std::size_t size>
inline StringModeBufRefImpl<typename std::add_const<Tchar>::type> ReadBuf(String::ReadWriteMode mode, const std::array<Tchar, size> &buf)
{
return StringModeBufRefImpl<typename std::add_const<Tchar>::type>(buf.data(), size, mode);
}
template <typename Tchar, std::size_t size>
inline StringModeBufRefImpl<typename std::add_const<Tchar>::type> ReadBuf(String::ReadWriteMode mode, const Tchar (&buf)[size])
{
return StringModeBufRefImpl<typename std::add_const<Tchar>::type>(buf, size, mode);
}
template <typename Tchar>
inline StringModeBufRefImpl<typename std::add_const<Tchar>::type> ReadBuf(String::ReadWriteMode mode, const Tchar * buf, std::size_t size)
{
return StringModeBufRefImpl<typename std::add_const<Tchar>::type>(buf, size, mode);
}
template <typename Tchar, std::size_t size>
inline StringModeBufRefImpl<Tchar> WriteBuf(String::ReadWriteMode mode, std::array<Tchar, size> &buf)
{
return StringModeBufRefImpl<Tchar>(buf.data(), size, mode);
}
template <typename Tchar, std::size_t size>
inline StringModeBufRefImpl<Tchar> WriteBuf(String::ReadWriteMode mode, Tchar (&buf)[size])
{
return StringModeBufRefImpl<Tchar>(buf, size, mode);
}
template <typename Tchar>
inline StringModeBufRefImpl<Tchar> WriteBuf(String::ReadWriteMode mode, Tchar * buf, std::size_t size)
{
return StringModeBufRefImpl<Tchar>(buf, size, mode);
}
} // namespace String
template <std::size_t len, mpt::String::ReadWriteMode mode>
struct modecharbuf
{
public:
typedef char Tchar;
using char_type = Tchar;
using string_type = std::basic_string<Tchar>;
public:
Tchar buf[len];
public:
modecharbuf() = default;
modecharbuf(const modecharbuf &) = default;
modecharbuf(modecharbuf &&) = default;
modecharbuf & operator = (const modecharbuf &) = default;
modecharbuf & operator = (modecharbuf &&) = default;
operator string_type () const
{
return mpt::String::ReadBuf(mode, buf);
}
bool empty() const
{
return mpt::String::ReadBuf(mode, buf).empty();
}
modecharbuf & operator = (const string_type & str)
{
mpt::String::WriteBuf(mode, buf) = str;
return *this;
}
};
// see MPT_BINARY_STRUCT
template <std::size_t len, mpt::String::ReadWriteMode mode>
constexpr bool declare_binary_safe(const typename mpt::modecharbuf<len, mode> &) { return true; }
//struct is_binary_safe<typename mpt::modecharbuf<len, mode>> : public std::true_type { };
static_assert(sizeof(mpt::modecharbuf<7, mpt::String::ReadWriteMode::nullTerminated>) == 7);
static_assert(alignof(mpt::modecharbuf<7, mpt::String::ReadWriteMode::nullTerminated>) == 1);
static_assert(std::is_standard_layout<mpt::modecharbuf<7, mpt::String::ReadWriteMode::nullTerminated>>::value);
#ifdef MODPLUG_TRACKER
#if MPT_OS_WINDOWS
namespace String {
using mpt::ReadWinBuf;
using mpt::WriteWinBuf;
} // namespace String
#if defined(MPT_WITH_MFC)
namespace String {
using mpt::ReadCStringBuf;
using mpt::WriteCStringBuf;
} // namespace String
#endif // MPT_WITH_MFC
#endif // MPT_OS_WINDOWS
#endif // MODPLUG_TRACKER
namespace String
{
#if MPT_COMPILER_MSVC
#pragma warning(push)
#pragma warning(disable:4127) // conditional expression is constant
#endif // MPT_COMPILER_MSVC
// Sets last character to null in given char array.
// Size of the array must be known at compile time.
template <size_t size>
void SetNullTerminator(char (&buffer)[size])
{
static_assert(size > 0);
buffer[size - 1] = 0;
}
inline void SetNullTerminator(char *buffer, size_t size)
{
MPT_ASSERT(size > 0);
buffer[size - 1] = 0;
}
#if !defined(MPT_COMPILER_QUIRK_NO_WCHAR)
template <size_t size>
void SetNullTerminator(wchar_t (&buffer)[size])
{
static_assert(size > 0);
buffer[size - 1] = 0;
}
inline void SetNullTerminator(wchar_t *buffer, size_t size)
{
MPT_ASSERT(size > 0);
buffer[size - 1] = 0;
}
#endif // !MPT_COMPILER_QUIRK_NO_WCHAR
#if MPT_COMPILER_MSVC
#pragma warning(pop)
#endif // MPT_COMPILER_MSVC
} // namespace String
} // namespace mpt
OPENMPT_NAMESPACE_END
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