113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
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/** @file File I/O wrappers for C++. Use interfaces instead of function
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* pointers to be sure even the silliest men on earth can work with this
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*/
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#ifndef AI_IOSTREAM_H_INC
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#define AI_IOSTREAM_H_INC
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#include <string>
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#include <stddef.h>
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#include "aiTypes.h"
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#include "aiFileIO.h"
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#ifndef __cplusplus
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#error This header requires C++ to be used.
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#endif
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namespace Assimp
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{
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// ---------------------------------------------------------------------------
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/** Class to handle file I/O for C++
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*
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* Derive an own implementation from this interface to provide custom IO handling
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* to the Importer. If you implement this interface, be sure to also provide an
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* implementation for IOSystem that creates instances of your custom IO class.
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*/
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// ---------------------------------------------------------------------------
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class ASSIMP_API IOStream
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{
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protected:
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/** Constructor protected, use IOSystem::Open() to create an instance. */
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IOStream(void);
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public:
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// -------------------------------------------------------------------
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/** Destructor. Deleting the object closes the underlying file,
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* alternatively you may use IOSystem::Close() to release the file.
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*/
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virtual ~IOStream(void);
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// -------------------------------------------------------------------
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/** Read from the file
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*
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* See fread() for more details
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* This fails for write-only files
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*/
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// -------------------------------------------------------------------
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virtual size_t Read(
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void* pvBuffer,
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size_t pSize,
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size_t pCount) = 0;
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// -------------------------------------------------------------------
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/** Write to the file
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*
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* See fwrite() for more details
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* This fails for read-only files
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*/
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// -------------------------------------------------------------------
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virtual size_t Write(
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const void* pvBuffer,
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size_t pSize,
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size_t pCount) = 0;
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// -------------------------------------------------------------------
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/** Set the read/write cursor of the file
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*
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* See fseek() for more details
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*/
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// -------------------------------------------------------------------
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virtual aiReturn Seek(
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size_t pOffset,
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aiOrigin pOrigin) = 0;
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// -------------------------------------------------------------------
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/** Get the current position of the read/write cursor
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*
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* See ftell() for more details
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*/
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// -------------------------------------------------------------------
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virtual size_t Tell(void) const = 0;
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// -------------------------------------------------------------------
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/** Returns filesize
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*
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* Returns the filesize
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*/
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// -------------------------------------------------------------------
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virtual size_t FileSize() const = 0;
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};
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// ----------------------------------------------------------------------------
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inline IOStream::IOStream()
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{
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// empty
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}
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// ----------------------------------------------------------------------------
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inline IOStream::~IOStream()
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{
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// empty
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}
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// ----------------------------------------------------------------------------
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} //!ns Assimp
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#endif //!!AI_IOSTREAM_H_INC
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