PreallocatedStreamBuf.h

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#pragma once
 
#include <aws/core/Core_EXPORTS.h>
#include <aws/core/utils/Array.h>
#include <streambuf>
 
namespace Aws
{
    namespace Utils
    {
        namespace Stream
        {
            class AWS_CORE_API PreallocatedStreamBuf : public std::streambuf
            {
            public:
                PreallocatedStreamBuf(unsigned char* buffer, uint64_t lengthToRead);
 
                PreallocatedStreamBuf(const PreallocatedStreamBuf&) = delete;
                PreallocatedStreamBuf& operator=(const PreallocatedStreamBuf&) = delete;
 
                PreallocatedStreamBuf(PreallocatedStreamBuf&& toMove) = delete;
                PreallocatedStreamBuf& operator=(PreallocatedStreamBuf&&) = delete;
 
                unsigned char* GetBuffer() { return m_underlyingBuffer; }
 
            protected:
                pos_type seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which = std::ios_base::in | std::ios_base::out) override;
                pos_type seekpos(pos_type pos, std::ios_base::openmode which = std::ios_base::in | std::ios_base::out) override;
 
            private:
                unsigned char* m_underlyingBuffer;
                const uint64_t m_lengthToRead;
            };
        }
    }
}