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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,120 @@ | ||
| #include "aligned_buffer.h" | ||
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| #include <cloud/storage/core/libs/common/error.h> | ||
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| #include <util/system/align.h> | ||
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| namespace NCloud { | ||
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| //////////////////////////////////////////////////////////////////////////////// | ||
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| TStringBuf TAlignedBuffer::ExtractAlignedData( | ||
| const TString& buffer, | ||
| ui32 align) | ||
| { | ||
| auto alignedData = buffer.begin(); | ||
| if (align) { | ||
| alignedData = AlignUp(buffer.data(), align); | ||
| if (alignedData > buffer.end()) { | ||
| ythrow TServiceError(E_ARGUMENT) | ||
| << "Extracting unaligned buffer " << (void*)buffer.begin() | ||
| << " with alignment " << align | ||
| << " with size " << buffer.size(); | ||
| } | ||
| } | ||
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| return TStringBuf(alignedData, buffer.end() - alignedData); | ||
| } | ||
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| TAlignedBuffer::TAlignedBuffer() | ||
| : AlignedData(Buffer.begin()) | ||
| {} | ||
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| TAlignedBuffer::TAlignedBuffer(TAlignedBuffer&& other) | ||
| : Buffer(std::move(other.Buffer)) | ||
| , AlignedData(std::move(other.AlignedData)) | ||
| { | ||
| other.AlignedData = other.Buffer.begin(); | ||
| } | ||
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| TAlignedBuffer& TAlignedBuffer::operator=(TAlignedBuffer&& other) | ||
| { | ||
| Buffer = std::move(other.Buffer); | ||
| AlignedData = std::move(other.AlignedData); | ||
| other.AlignedData = other.Buffer.begin(); | ||
| return *this; | ||
| } | ||
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| TAlignedBuffer::TAlignedBuffer(ui32 size, ui32 align) | ||
| : Buffer(TString::Uninitialized(size + align)) | ||
| , AlignedData(Buffer.begin()) | ||
| { | ||
| if (align) { | ||
| Y_DEBUG_ABORT_UNLESS(IsPowerOf2(align)); // align should be power of 2 | ||
| AlignedData = AlignUp(Buffer.data(), align); | ||
| Buffer.resize(AlignedData + size - Buffer.begin()); | ||
| } | ||
| } | ||
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| TAlignedBuffer::TAlignedBuffer(TString&& buffer, ui32 align) | ||
| : Buffer(std::move(buffer)) | ||
| , AlignedData(Buffer.begin()) | ||
| { | ||
| if (align) { | ||
| Y_DEBUG_ABORT_UNLESS(IsPowerOf2(align)); // align should be power of 2 | ||
| AlignedData = AlignUp(Buffer.data(), align); | ||
| if (AlignedData > Buffer.end()) { | ||
| ythrow TServiceError(E_ARGUMENT) | ||
| << "Initializing from unaligned buffer " | ||
| << (void*)Buffer.begin() | ||
| << " with alignment " << align | ||
| << " with size " << Buffer.size(); | ||
| } | ||
| } | ||
| } | ||
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| size_t TAlignedBuffer::AlignedDataOffset() const | ||
| { | ||
| return AlignedData - Buffer.begin(); | ||
| } | ||
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| char* TAlignedBuffer::Begin() | ||
| { | ||
| return const_cast<char*>(AlignedData); | ||
| } | ||
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| const char* TAlignedBuffer::Begin() const | ||
| { | ||
| return AlignedData; | ||
| } | ||
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| char* TAlignedBuffer::End() | ||
| { | ||
| return const_cast<char*>(Buffer.end()); | ||
| } | ||
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| const char* TAlignedBuffer::End() const | ||
| { | ||
| return Buffer.end(); | ||
| } | ||
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| size_t TAlignedBuffer::Size() const | ||
| { | ||
| return End() - Begin(); | ||
| } | ||
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| void TAlignedBuffer::TrimSize(size_t size) | ||
| { | ||
| if (size > Size()) { | ||
| ythrow TServiceError(E_ARGUMENT) | ||
| << "Tried to trim to size " << size << " > " << Size(); | ||
| } | ||
| Buffer.resize(AlignedDataOffset() + size); | ||
| } | ||
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| TString& TAlignedBuffer::AccessBuffer() | ||
| { | ||
| return Buffer; | ||
| } | ||
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| } // namespace NCloud |
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