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SqMod/module/Library/IO/Buffer.hpp
Sandu Liviu Catalin d295828545 Add GetJSON method to buffer.
2023-03-05 15:37:24 +02:00

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#pragma once
// ------------------------------------------------------------------------------------------------
#include "Core/Buffer.hpp"
#include "Core/Utility.hpp"
// ------------------------------------------------------------------------------------------------
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Squirrel wrapper for the shared buffer class.
*/
class SqBuffer
{
private:
// --------------------------------------------------------------------------------------------
typedef SharedPtr< Buffer > SRef; // Strong reference type to the managed memory buffer.
typedef WeakPtr< Buffer > WRef; // Weak reference type to the managed memory buffer.
// --------------------------------------------------------------------------------------------
SRef m_Buffer; // The managed memory buffer.
public:
// --------------------------------------------------------------------------------------------
typedef Buffer::Value Value; // The type of value used to represent a byte.
// --------------------------------------------------------------------------------------------
typedef Value & Reference; // A reference to the stored value type.
typedef const Value & ConstRef; // A const reference to the stored value type.
// --------------------------------------------------------------------------------------------
typedef Value * Pointer; // A pointer to the stored value type.
typedef const Value * ConstPtr; // A const pointer to the stored value type.
// --------------------------------------------------------------------------------------------
typedef Buffer::SzType SzType; // The type used to represent size in general.
public:
/* --------------------------------------------------------------------------------------------
* Default constructor.
*/
SqBuffer()
: m_Buffer(new Buffer())
{
}
/* --------------------------------------------------------------------------------------------
* Allocate constructor.
*/
explicit SqBuffer(SQInteger n)
: m_Buffer(new Buffer(ConvTo< SzType >::From(n)))
{
}
/* --------------------------------------------------------------------------------------------
* Allocate constructor.
*/
SqBuffer(SQInteger n, SQInteger c)
: m_Buffer(new Buffer(ConvTo< SzType >::From(n), ConvTo< SzType >::From(c)))
{
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
SqBuffer(ConstPtr p, SQInteger n)
: m_Buffer(new Buffer(p, ConvTo< SzType >::From(n)))
{
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
SqBuffer(ConstPtr p, SQInteger n, SQInteger c)
: m_Buffer(new Buffer(p, ConvTo< SzType >::From(n), ConvTo< SzType >::From(c)))
{
}
/* --------------------------------------------------------------------------------------------
* Reference constructor.
*/
explicit SqBuffer(const SRef & ref) // NOLINT(modernize-pass-by-value)
: m_Buffer(ref)
{
}
/* --------------------------------------------------------------------------------------------
* Buffer constructor.
*/
explicit SqBuffer(const Buffer & b)
: m_Buffer(new Buffer(b))
{
}
/* --------------------------------------------------------------------------------------------
* Buffer constructor.
*/
explicit SqBuffer(Buffer && b)
: m_Buffer(new Buffer(std::move(b)))
{
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
SqBuffer(const SqBuffer & o) = default;
/* --------------------------------------------------------------------------------------------
* Move constructor.
*/
SqBuffer(SqBuffer && o) = default;
/* --------------------------------------------------------------------------------------------
* Destructor.
*/
~SqBuffer() = default;
/* --------------------------------------------------------------------------------------------
* Copy assignment operator.
*/
SqBuffer & operator = (const SqBuffer & o) = default;
/* --------------------------------------------------------------------------------------------
* Move assignment operator.
*/
SqBuffer & operator = (SqBuffer && o) = default;
/* --------------------------------------------------------------------------------------------
* Retrieve a reference to the managed memory buffer.
*/
SQMOD_NODISCARD const SRef & GetRef() const
{
return m_Buffer;
}
/* --------------------------------------------------------------------------------------------
* Retrieve a reference to the managed memory buffer.
*/
SQMOD_NODISCARD Buffer & GetInst() const
{
return *m_Buffer;
}
/* --------------------------------------------------------------------------------------------
* Validate the managed memory buffer reference.
*/
void Validate() const
{
// Do we even point to a valid buffer?
if (!m_Buffer)
{
STHROWF("Invalid memory buffer reference");
}
}
/* --------------------------------------------------------------------------------------------
* Validate the managed memory buffer reference and the buffer itself.
*/
void ValidateDeeper() const
{
// Do we even point to a valid buffer?
if (!m_Buffer)
{
STHROWF("Invalid memory buffer reference");
}
// Validate the buffer itself
else if (!(*m_Buffer))
{
STHROWF("Invalid memory buffer");
}
}
/* --------------------------------------------------------------------------------------------
* Validate the managed memory buffer reference.
*/
SQMOD_NODISCARD Buffer & Valid() const
{
Validate();
// Return the buffer
return *m_Buffer;
}
/* --------------------------------------------------------------------------------------------
* Validate the managed memory buffer reference and the buffer itself.
*/
SQMOD_NODISCARD Buffer & ValidDeeper() const
{
ValidateDeeper();
// Return the buffer
return *m_Buffer;
}
/* --------------------------------------------------------------------------------------------
* Limit the specified amount at to the range of the cursor and the end of the buffer.
*/
SQMOD_NODISCARD SzType ClampRemaining(SQInteger n) const
{
// Do we even specify a buffer amount?
if (n >= 0)
{
// Is it within the range we currently have left?
if (static_cast< SzType >(n) <= m_Buffer->Remaining())
{
return static_cast< SzType >(n);
}
}
// Fall back to the actual remaining data
return m_Buffer->Remaining();
}
/* --------------------------------------------------------------------------------------------
* Retrieve a certain element type at the specified position.
*/
SQMOD_NODISCARD Value Get(SQInteger n) const
{
return Valid().At(ConvTo< SzType >::From(n));
}
/* --------------------------------------------------------------------------------------------
* Modify a certain element type at the specified position.
*/
void Set(SQInteger n, SQInteger v) const
{
Valid().At(ConvTo< SzType >::From(n)) = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element at the front of the buffer.
*/
SQMOD_NODISCARD Value GetFront() const
{
return Valid().Front();
}
/* --------------------------------------------------------------------------------------------
* Modify the element at the front of the buffer.
*/
void SetFront(SQInteger v) const
{
Valid().Front() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element after the first element in the buffer.
*/
SQMOD_NODISCARD Value GetNext() const
{
return Valid().Next();
}
/* --------------------------------------------------------------------------------------------
* Modify the element after the first element in the buffer.
*/
void SetNext(SQInteger v) const
{
Valid().Next() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element at the back of the buffer.
*/
SQMOD_NODISCARD Value GetBack() const
{
return Valid().Back();
}
/* --------------------------------------------------------------------------------------------
* Modify the element at the back of the buffer.
*/
void SetBack(SQInteger v) const
{
Valid().Back() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element before the last element in the buffer.
*/
SQMOD_NODISCARD Value GetPrev() const
{
return Valid().Prev();
}
/* --------------------------------------------------------------------------------------------
* Modify the element before the last element in the buffer.
*/
void SetPrev(SQInteger v) const
{
Valid().Prev() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Reposition the edit cursor to the specified number of elements ahead.
*/
SqBuffer & Advance(SQInteger n)
{
Valid().Advance(ConvTo< SzType >::From(n));
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Reposition the edit cursor to the specified number of elements behind.
*/
SqBuffer & Retreat(SQInteger n)
{
Valid().Retreat(ConvTo< SzType >::From(n));
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Reposition the edit cursor to a fixed position within the buffer.
*/
SqBuffer & Move(SQInteger n)
{
Valid().Move(ConvTo< SzType >::From(n));
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Append a value to the current cursor location and advance the cursor.
*/
SqBuffer & Push(SQInteger v)
{
Valid().Push(ConvTo< Value >::From(v));
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element at the cursor position.
*/
SQMOD_NODISCARD Value GetCursor() const
{
return Valid().Cursor();
}
/* --------------------------------------------------------------------------------------------
* Modify the element at the cursor position.
*/
void SetCursor(SQInteger v) const
{
Valid().Cursor() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element before the cursor position.
*/
SQMOD_NODISCARD Value GetBefore() const
{
return Valid().Before();
}
/* --------------------------------------------------------------------------------------------
* Modify the element before the cursor position.
*/
void SetBefore(SQInteger v) const
{
Valid().Before() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the element after the cursor position.
*/
SQMOD_NODISCARD Value GetAfter() const
{
return Valid().After();
}
/* --------------------------------------------------------------------------------------------
* Modify the element after the cursor position.
*/
void SetAfter(SQInteger v) const
{
Valid().After() = ConvTo< Value >::From(v);
}
/* --------------------------------------------------------------------------------------------
* Retrieve maximum elements it can hold for a certain type.
*/
SQMOD_NODISCARD SzType GetMax() const // NOLINT(readability-convert-member-functions-to-static)
{
return Buffer::Max();
}
/* --------------------------------------------------------------------------------------------
* Retrieve the current buffer capacity in element count.
*/
SQMOD_NODISCARD SzType GetSize() const
{
return Valid().CapacityAs< Value >();
}
/* --------------------------------------------------------------------------------------------
* Retrieve the current buffer capacity in byte count.
*/
SQMOD_NODISCARD SzType GetCapacity() const
{
return Valid().Capacity();
}
/* --------------------------------------------------------------------------------------------
* Retrieve the current position of the cursor in the buffer.
*/
SQMOD_NODISCARD SzType GetPosition() const
{
return Valid().Position();
}
/* --------------------------------------------------------------------------------------------
* Retrieve the amount of unused buffer after the edit cursor.
*/
SQMOD_NODISCARD SzType GetRemaining() const
{
return Valid().Remaining();
}
/* --------------------------------------------------------------------------------------------
* Grow the size of the internal buffer by the specified amount of bytes.
*/
SqBuffer & Grow(SQInteger n)
{
Valid().Grow(ConvTo< SzType >::From(n) * sizeof(Value));
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Makes sure there is enough capacity to hold the specified element count.
*/
SqBuffer & Adjust(SQInteger n)
{
// Validate the managed buffer reference
Validate();
// Attempt to perform the requested operation
try
{
Buffer bkp(m_Buffer->Adjust(ConvTo< SzType >::From(n) * sizeof(Value)));
// Copy the data into the new buffer
m_Buffer->Write(0, bkp.Data(), bkp.Capacity());
m_Buffer->Move(bkp.Position());
}
catch (const std::exception & e)
{
STHROWF("{}", e.what()); // Re-package
}
// Allow chaining
return *this;
}
/* --------------------------------------------------------------------------------------------
* Write a signed 8 bit integer to the buffer.
*/
void WriteInt8(SQInteger val) const
{
Valid().Push< int8_t >(static_cast< int8_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write an unsigned 8 bit integer to the buffer.
*/
void WriteUint8(SQInteger val) const
{
Valid().Push< uint8_t >(static_cast< uint8_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write a signed 16 bit integer to the buffer.
*/
void WriteInt16(SQInteger val) const
{
Valid().Push< int16_t >(static_cast< int16_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write an unsigned 16 bit integer to the buffer.
*/
void WriteUint16(SQInteger val) const
{
Valid().Push< uint16_t >(static_cast< uint16_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write a signed 32 bit integer to the buffer.
*/
void WriteInt32(SQInteger val) const
{
Valid().Push< int32_t >(static_cast< int32_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write an unsigned 32 bit integer to the buffer.
*/
void WriteUint32(SQInteger val) const
{
Valid().Push< uint32_t >(static_cast< uint32_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write a signed 64 bit integer to the buffer.
*/
void WriteInt64(SQInteger val) const
{
Valid().Push< int64_t >(static_cast< int64_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write an unsigned 64 bit integer to the buffer.
*/
void WriteUint64(SQInteger val) const
{
Valid().Push< uint64_t >(static_cast< uint64_t >(val));
}
/* --------------------------------------------------------------------------------------------
* Write a 32 bit float to the buffer.
*/
void WriteFloat32(SQFloat val) const
{
Valid().Push< float >(ConvTo< float >::From(val));
}
/* --------------------------------------------------------------------------------------------
* Write a 64 bit float to the buffer.
*/
void WriteFloat64(SQFloat val) const
{
Valid().Push< double >(ConvTo< double >::From(val));
}
/* --------------------------------------------------------------------------------------------
* Write a raw string to the buffer.
*/
SQInteger WriteRawString(StackStrF & val) const;
/* --------------------------------------------------------------------------------------------
* Write a client encoded string to the buffer.
*/
SQInteger WriteClientString(StackStrF & val) const;
/* --------------------------------------------------------------------------------------------
* Write a AABB to the buffer.
*/
void WriteAABB(const AABB & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Circle to the buffer.
*/
void WriteCircle(const Circle & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Color3 to the buffer.
*/
void WriteColor3(const Color3 & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Color4 to the buffer.
*/
void WriteColor4(const Color4 & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Quaternion to the buffer.
*/
void WriteQuaternion(const Quaternion & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Sphere to the buffer.
*/
void WriteSphere(const Sphere &val) const;
/* --------------------------------------------------------------------------------------------
* Write a Vector2 to the buffer.
*/
void WriteVector2(const Vector2 & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Vector2i to the buffer.
*/
void WriteVector2i(const Vector2i & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Vector3 to the buffer.
*/
void WriteVector3(const Vector3 & val) const;
/* --------------------------------------------------------------------------------------------
* Write a Vector4 to the buffer.
*/
void WriteVector4(const Vector4 & val) const;
/* --------------------------------------------------------------------------------------------
* Write a signed 8 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadInt8() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const int8_t value = m_Buffer->Cursor< int8_t >();
// Advance the buffer cursor
m_Buffer->Advance< int8_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read an unsigned 8 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadUint8() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const uint8_t value = m_Buffer->Cursor< uint8_t >();
// Advance the buffer cursor
m_Buffer->Advance< uint8_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read a signed 16 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadInt16() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const int16_t value = m_Buffer->Cursor< int16_t >();
// Advance the buffer cursor
m_Buffer->Advance< int16_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read an unsigned 16 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadUint16() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const uint16_t value = m_Buffer->Cursor< uint16_t >();
// Advance the buffer cursor
m_Buffer->Advance< uint16_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read a signed 32 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadInt32() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const int32_t value = m_Buffer->Cursor< int32_t >();
// Advance the buffer cursor
m_Buffer->Advance< int32_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read an unsigned 32 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadUint32() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const uint32_t value = m_Buffer->Cursor< uint32_t >();
// Advance the buffer cursor
m_Buffer->Advance< uint32_t >(1);
// Return the requested information
return ConvTo< SQInteger >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read a signed 64 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadInt64() const;
/* --------------------------------------------------------------------------------------------
* Read an unsigned 64 bit integer from the buffer.
*/
SQMOD_NODISCARD SQInteger ReadUint64() const;
/* --------------------------------------------------------------------------------------------
* Read a 32 bit float from the buffer.
*/
SQMOD_NODISCARD SQFloat ReadFloat32() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const float value = m_Buffer->Cursor< float >();
// Advance the buffer cursor
m_Buffer->Advance< float >(1);
// Return the requested information
return ConvTo< SQFloat >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read a 64 bit float from the buffer.
*/
SQMOD_NODISCARD SQFloat ReadFloat64() const
{
// Validate the managed buffer reference
ValidateDeeper();
// Read one element from the buffer
const double value = m_Buffer->Cursor< double >();
// Advance the buffer cursor
m_Buffer->Advance< double >(1);
// Return the requested information
return ConvTo< SQFloat >::From(value);
}
/* --------------------------------------------------------------------------------------------
* Read a raw string from the buffer.
*/
SQMOD_NODISCARD LightObj ReadRawString(SQInteger length) const;
/* --------------------------------------------------------------------------------------------
* Read a string from the buffer.
*/
SQMOD_NODISCARD LightObj ReadClientString() const;
/* --------------------------------------------------------------------------------------------
* Read a AABB from the buffer.
*/
SQMOD_NODISCARD AABB ReadAABB() const;
/* --------------------------------------------------------------------------------------------
* Read a Circle from the buffer.
*/
SQMOD_NODISCARD Circle ReadCircle() const;
/* --------------------------------------------------------------------------------------------
* Read a Color3 from the buffer.
*/
SQMOD_NODISCARD Color3 ReadColor3() const;
/* --------------------------------------------------------------------------------------------
* Read a Color4 from the buffer.
*/
SQMOD_NODISCARD Color4 ReadColor4() const;
/* --------------------------------------------------------------------------------------------
* Read a Quaternion from the buffer.
*/
SQMOD_NODISCARD Quaternion ReadQuaternion() const;
/* --------------------------------------------------------------------------------------------
* Read a Sphere from the buffer.
*/
SQMOD_NODISCARD Sphere ReadSphere() const;
/* --------------------------------------------------------------------------------------------
* Read a Vector2 from the buffer.
*/
SQMOD_NODISCARD Vector2 ReadVector2() const;
/* --------------------------------------------------------------------------------------------
* Read a Vector2i from the buffer.
*/
SQMOD_NODISCARD Vector2i ReadVector2i() const;
/* --------------------------------------------------------------------------------------------
* Read a Vector3 from the buffer.
*/
SQMOD_NODISCARD Vector3 ReadVector3() const;
/* --------------------------------------------------------------------------------------------
* Read a Vector4 from the buffer.
*/
SQMOD_NODISCARD Vector4 ReadVector4() const;
/* --------------------------------------------------------------------------------------------
* Transform a portion of the data in the buffer to a JSON object.
* This has the benefit that a temporary string doesn't have to be created.
*/
SQMOD_NODISCARD SQInteger GetJSON(HSQUIRRELVM vm) const;
/* --------------------------------------------------------------------------------------------
* Compute the CRC-32 checksums on the data in the buffer.
*/
SQMOD_NODISCARD SQInteger GetCRC32(SQInteger n) const;
/* --------------------------------------------------------------------------------------------
* Compute the Adler-32 checksums on the data in the buffer.
*/
SQMOD_NODISCARD SQInteger GetADLER32(SQInteger n) const;
/* --------------------------------------------------------------------------------------------
* Encode the specified range of data as base32 and return it.
*/
SQMOD_NODISCARD LightObj GetBase32(SQInteger n) const;
/* --------------------------------------------------------------------------------------------
* Encode the specified range of data as base64 and return it.
*/
SQMOD_NODISCARD LightObj GetBase64(SQInteger n) const;
};
} // Namespace:: SqMod
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