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https://github.com/Open-Cascade-SAS/OCCT.git
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a5a7b3185b
Update empty method guards to new style with regex (see PR). Used clang-format 18.1.8. New actions to validate code formatting is added. Update .clang-format with disabling of include sorting. It is temporary changes, then include will be sorted. Apply formatting for /src and /tools folder. The files with .hxx,.cxx,.lxx,.h,.pxx,.hpp,*.cpp extensions.
118 lines
4.8 KiB
C++
118 lines
4.8 KiB
C++
// Copyright (c) 2016 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Standard_ArrayStreamBuffer_HeaderFile
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#define _Standard_ArrayStreamBuffer_HeaderFile
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#include <Standard_Type.hxx>
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#include <fstream>
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// Suppress VC9 warning on xsputn() function
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable : 4996)
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#endif
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//! Custom buffer object implementing STL interface std::streambuf for streamed reading from
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//! allocated memory block. Implements minimal sub-set of methods for passing buffer to
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//! std::istream, including seek support.
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//!
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//! This class can be used for creating a seekable input stream in cases,
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//! when the source data does not satisfies Reader requirements (non-seekable stream, compressed
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//! data) or represents an in-memory resource.
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//!
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//! The memory itself is NOT managed by this class - it is up to the caller to ensure that passed
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//! memory pointer is not released during Standard_ArrayStreamBuffer lifetime.
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//!
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//! Usage example:
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//! @code
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//! const char* theBuffer;
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//! const size_t theBufferLength;
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//! Standard_ArrayStreamBuffer aStreamBuffer (theBuffer, theBufferLength);
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//! std::istream aStream (&aStreamBuffer);
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//! TopoDS_Shape aShape;
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//! BRep_Builder aBuilder;
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//! BRepTools::Read (aShape, aStream, aBuilder);
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//! @endcode
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class Standard_ArrayStreamBuffer : public std::streambuf
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{
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public:
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//! Main constructor.
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//! Passed pointer is stored as is (memory is NOT copied nor released with destructor).
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//! @param theBegin pointer to the beginning of pre-allocated buffer
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//! @param theSize length of pre-allocated buffer
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Standard_EXPORT Standard_ArrayStreamBuffer(const char* theBegin, const size_t theSize);
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//! Destructor.
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Standard_EXPORT virtual ~Standard_ArrayStreamBuffer();
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//! (Re)-initialize the stream.
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//! Passed pointer is stored as is (memory is NOT copied nor released with destructor).
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//! @param theBegin pointer to the beginning of pre-allocated buffer
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//! @param theSize length of pre-allocated buffer
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Standard_EXPORT virtual void Init(const char* theBegin, const size_t theSize);
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protected:
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//! Get character on underflow.
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//! Virtual function called by other member functions to get the current character
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//! in the controlled input sequence without changing the current position.
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Standard_EXPORT virtual int_type underflow() Standard_OVERRIDE;
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//! Get character on underflow and advance position.
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//! Virtual function called by other member functions to get the current character
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//! in the controlled input sequence and then advance the position indicator to the next
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//! character.
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Standard_EXPORT virtual int_type uflow() Standard_OVERRIDE;
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//! Put character back in the case of backup underflow.
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//! Virtual function called by other member functions to put a character back
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//! into the controlled input sequence and decrease the position indicator.
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Standard_EXPORT virtual int_type pbackfail(int_type ch) Standard_OVERRIDE;
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//! Get number of characters available.
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//! Virtual function (to be read s-how-many-c) called by other member functions
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//! to get an estimate on the number of characters available in the associated input sequence.
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Standard_EXPORT virtual std::streamsize showmanyc() Standard_OVERRIDE;
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//! Seek to specified position.
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Standard_EXPORT virtual pos_type seekoff(off_type theOff,
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std::ios_base::seekdir theWay,
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std::ios_base::openmode theWhich) Standard_OVERRIDE;
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//! Change to specified position, according to mode.
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Standard_EXPORT virtual pos_type seekpos(pos_type thePosition,
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std::ios_base::openmode theWhich) Standard_OVERRIDE;
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public:
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//! Read a bunch of bytes at once.
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Standard_EXPORT virtual std::streamsize xsgetn(char* thePtr,
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std::streamsize theCount) Standard_OVERRIDE;
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private:
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// copying is not allowed
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Standard_ArrayStreamBuffer(const Standard_ArrayStreamBuffer&);
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Standard_ArrayStreamBuffer& operator=(const Standard_ArrayStreamBuffer&);
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protected:
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const char* myBegin;
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const char* myEnd;
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const char* myCurrent;
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};
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#endif // _Standard_ArrayStreamBuffer_HeaderFile
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