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// Copyright Epic Games, Inc. All Rights Reserved.
#include <stdarg.h>
#include <zencore/memoryview.h>
#include <zencore/stream.h>
#include <zencore/testing.h>
#include <algorithm>
#include <stdexcept>
namespace zen {
void
BinaryWriter::Write(std::initializer_list<const MemoryView> Buffers)
{
size_t TotalByteCount = 0;
for (const MemoryView& View : Buffers)
{
TotalByteCount += View.GetSize();
}
const size_t NeedEnd = m_Offset + TotalByteCount;
if (NeedEnd > m_Buffer.size())
{
m_Buffer.resize(NeedEnd);
}
for (const MemoryView& View : Buffers)
{
size_t Size = View.GetSize();
memcpy(m_Buffer.data() + m_Offset, View.GetData(), Size);
m_Offset += Size;
}
}
void
BinaryWriter::Write(const void* data, size_t ByteCount, uint64_t Offset)
{
const size_t NeedEnd = Offset + ByteCount;
if (NeedEnd > m_Buffer.size())
{
m_Buffer.resize(NeedEnd);
}
memcpy(m_Buffer.data() + Offset, data, ByteCount);
}
void
BinaryWriter::Reset()
{
m_Buffer.clear();
m_Offset = 0;
}
//////////////////////////////////////////////////////////////////////////
void
BufferReader::Seek(uint64_t InPos)
{
// Validate range
m_Offset = InPos;
}
int64_t
BufferReader::Tell()
{
return CurrentOffset();
}
void
BufferReader::Serialize(void* V, int64_t Length)
{
Read(V, Length);
}
//////////////////////////////////////////////////////////////////////////
//
// Testing related code follows...
//
#if ZEN_WITH_TESTS
TEST_CASE("binary.writer.span")
{
BinaryWriter Writer;
const MemoryView View1("apa", 3);
const MemoryView View2(" ", 1);
const MemoryView View3("banan", 5);
Writer.Write({View1, View2, View3});
MemoryView Result = Writer.GetView();
CHECK(Result.GetSize() == 9);
CHECK(memcmp(Result.GetData(), "apa banan", 9) == 0);
}
void
stream_forcelink()
{
}
#endif
} // namespace zen
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