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authorgit perforce import user <a@b>2016-10-25 12:29:14 -0600
committerSheikh Dawood Abdul Ajees <Sheikh Dawood Abdul Ajees>2016-10-25 18:56:37 -0500
commit3dfe2108cfab31ba3ee5527e217d0d8e99a51162 (patch)
treefa6485c169e50d7415a651bf838f5bcd0fd3bfbd /PxShared/src/filebuf/include/PsFileBuffer.h
downloadphysx-3.4-3dfe2108cfab31ba3ee5527e217d0d8e99a51162.tar.xz
physx-3.4-3dfe2108cfab31ba3ee5527e217d0d8e99a51162.zip
Initial commit:
PhysX 3.4.0 Update @ 21294896 APEX 1.4.0 Update @ 21275617 [CL 21300167]
Diffstat (limited to 'PxShared/src/filebuf/include/PsFileBuffer.h')
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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+
+#ifndef PSFILEBUFFER_PSFILEBUFFER_H
+#define PSFILEBUFFER_PSFILEBUFFER_H
+
+#include "filebuf/PxFileBuf.h"
+
+#include "Ps.h"
+#include "PsUserAllocated.h"
+#include <stdio.h>
+
+namespace physx
+{
+namespace general_PxIOStream2
+{
+ using namespace shdfnd;
+
+//Use this class if you want to use your own allocator
+class PxFileBufferBase : public PxFileBuf
+{
+public:
+ PxFileBufferBase(const char *fileName,OpenMode mode)
+ {
+ mOpenMode = mode;
+ mFph = NULL;
+ mFileLength = 0;
+ mSeekRead = 0;
+ mSeekWrite = 0;
+ mSeekCurrent = 0;
+ switch ( mode )
+ {
+ case OPEN_READ_ONLY:
+ mFph = fopen(fileName,"rb");
+ break;
+ case OPEN_WRITE_ONLY:
+ mFph = fopen(fileName,"wb");
+ break;
+ case OPEN_READ_WRITE_NEW:
+ mFph = fopen(fileName,"wb+");
+ break;
+ case OPEN_READ_WRITE_EXISTING:
+ mFph = fopen(fileName,"rb+");
+ break;
+ case OPEN_FILE_NOT_FOUND:
+ break;
+ }
+ if ( mFph )
+ {
+ fseek(mFph,0L,SEEK_END);
+ mFileLength = static_cast<uint32_t>(ftell(mFph));
+ fseek(mFph,0L,SEEK_SET);
+ }
+ else
+ {
+ mOpenMode = OPEN_FILE_NOT_FOUND;
+ }
+ }
+
+ virtual ~PxFileBufferBase()
+ {
+ close();
+ }
+
+ virtual void close()
+ {
+ if( mFph )
+ {
+ fclose(mFph);
+ mFph = 0;
+ }
+ }
+
+ virtual SeekType isSeekable(void) const
+ {
+ return mSeekType;
+ }
+
+ virtual uint32_t read(void* buffer, uint32_t size)
+ {
+ uint32_t ret = 0;
+ if ( mFph )
+ {
+ setSeekRead();
+ ret = static_cast<uint32_t>(::fread(buffer,1,size,mFph));
+ mSeekRead+=ret;
+ mSeekCurrent+=ret;
+ }
+ return ret;
+ }
+
+ virtual uint32_t peek(void* buffer, uint32_t size)
+ {
+ uint32_t ret = 0;
+ if ( mFph )
+ {
+ uint32_t loc = tellRead();
+ setSeekRead();
+ ret = static_cast<uint32_t>(::fread(buffer,1,size,mFph));
+ mSeekCurrent+=ret;
+ seekRead(loc);
+ }
+ return ret;
+ }
+
+ virtual uint32_t write(const void* buffer, uint32_t size)
+ {
+ uint32_t ret = 0;
+ if ( mFph )
+ {
+ setSeekWrite();
+ ret = static_cast<uint32_t>(::fwrite(buffer,1,size,mFph));
+ mSeekWrite+=ret;
+ mSeekCurrent+=ret;
+ if ( mSeekWrite > mFileLength )
+ {
+ mFileLength = mSeekWrite;
+ }
+ }
+ return ret;
+ }
+
+ virtual uint32_t tellRead(void) const
+ {
+ return mSeekRead;
+ }
+
+ virtual uint32_t tellWrite(void) const
+ {
+ return mSeekWrite;
+ }
+
+ virtual uint32_t seekRead(uint32_t loc)
+ {
+ mSeekRead = loc;
+ if ( mSeekRead > mFileLength )
+ {
+ mSeekRead = mFileLength;
+ }
+ return mSeekRead;
+ }
+
+ virtual uint32_t seekWrite(uint32_t loc)
+ {
+ mSeekWrite = loc;
+ if ( mSeekWrite > mFileLength )
+ {
+ mSeekWrite = mFileLength;
+ }
+ return mSeekWrite;
+ }
+
+ virtual void flush(void)
+ {
+ if ( mFph )
+ {
+ ::fflush(mFph);
+ }
+ }
+
+ virtual OpenMode getOpenMode(void) const
+ {
+ return mOpenMode;
+ }
+
+ virtual uint32_t getFileLength(void) const
+ {
+ return mFileLength;
+ }
+
+private:
+ // Moves the actual file pointer to the current read location
+ void setSeekRead(void)
+ {
+ if ( mSeekRead != mSeekCurrent && mFph )
+ {
+ if ( mSeekRead >= mFileLength )
+ {
+ fseek(mFph,0L,SEEK_END);
+ }
+ else
+ {
+ fseek(mFph,static_cast<long>(mSeekRead),SEEK_SET);
+ }
+ mSeekCurrent = mSeekRead = static_cast<uint32_t>(ftell(mFph));
+ }
+ }
+ // Moves the actual file pointer to the current write location
+ void setSeekWrite(void)
+ {
+ if ( mSeekWrite != mSeekCurrent && mFph )
+ {
+ if ( mSeekWrite >= mFileLength )
+ {
+ fseek(mFph,0L,SEEK_END);
+ }
+ else
+ {
+ fseek(mFph,static_cast<long>(mSeekWrite),SEEK_SET);
+ }
+ mSeekCurrent = mSeekWrite = static_cast<uint32_t>(ftell(mFph));
+ }
+ }
+
+
+ FILE *mFph;
+ uint32_t mSeekRead;
+ uint32_t mSeekWrite;
+ uint32_t mSeekCurrent;
+ uint32_t mFileLength;
+ SeekType mSeekType;
+ OpenMode mOpenMode;
+};
+
+//Use this class if you want to use PhysX memory allocator
+class PsFileBuffer: public PxFileBufferBase, public UserAllocated
+{
+public:
+ PsFileBuffer(const char *fileName,OpenMode mode): PxFileBufferBase(fileName, mode) {}
+};
+
+}
+using namespace general_PxIOStream2;
+}
+
+#endif // PSFILEBUFFER_PSFILEBUFFER_H