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https://github.com/bulletphysics/bullet3.git
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762c21601f
this allows zipfiles to be stored anywhere in already registed fileIO (such as zipfiles inside other zipfiles) see Bullet/examples/pybullet/examples/fileIOPlugin.py enable vhacd, fileIO and zipFileIO in premake version of PyBullet fix potential memory leak in mtl loading
702 lines
16 KiB
C++
702 lines
16 KiB
C++
#include "fileIOPlugin.h"
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#include "../../SharedMemoryPublic.h"
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#include "../b3PluginContext.h"
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#include <stdio.h>
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#include "../../../CommonInterfaces/CommonFileIOInterface.h"
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#include "../../../Utils/b3ResourcePath.h"
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#include "Bullet3Common/b3HashMap.h"
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#include <string.h> //memcpy/strlen
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#ifndef B3_EXCLUDE_DEFAULT_FILEIO
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#include "../../../Utils/b3BulletDefaultFileIO.h"
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#endif //B3_EXCLUDE_DEFAULT_FILEIO
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#ifdef B3_USE_ZIPFILE_FILEIO
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#include "zipFileIO.h"
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#endif //B3_USE_ZIPFILE_FILEIO
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#ifdef B3_USE_CNS_FILEIO
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#include "CNSFileIO.h"
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#endif //B3_USE_CNS_FILEIO
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#define B3_MAX_FILEIO_INTERFACES 1024
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struct WrapperFileHandle
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{
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CommonFileIOInterface* childFileIO;
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int m_childFileHandle;
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};
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struct InMemoryFile
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{
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char* m_buffer;
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int m_fileSize;
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};
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struct InMemoryFileAccessor
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{
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InMemoryFile* m_file;
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int m_curPos;
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};
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struct InMemoryFileIO : public CommonFileIOInterface
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{
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b3HashMap<b3HashString,InMemoryFile*> m_fileCache;
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InMemoryFileAccessor m_fileHandles[B3_MAX_FILEIO_INTERFACES];
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int m_numAllocs;
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int m_numFrees;
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InMemoryFileIO()
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:CommonFileIOInterface(eInMemoryFileIO,0)
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{
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m_numAllocs=0;
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m_numFrees=0;
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for (int i=0;i<B3_FILEIO_MAX_FILES;i++)
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{
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m_fileHandles[i].m_curPos = 0;
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m_fileHandles[i].m_file = 0;
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}
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}
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virtual ~InMemoryFileIO()
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{
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clearCache();
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if (m_numAllocs != m_numFrees)
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{
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printf("Error: InMemoryFile::~InMemoryFileIO (numAllocs %d numFrees %d\n", m_numAllocs, m_numFrees);
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}
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}
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void clearCache()
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{
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for (int i=0;i<m_fileCache.size();i++)
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{
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b3HashString name = m_fileCache.getKeyAtIndex(i);
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InMemoryFile** memPtr = m_fileCache.getAtIndex(i);
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if (memPtr && *memPtr)
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{
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InMemoryFile* mem = *memPtr;
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freeBuffer(mem->m_buffer);
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m_numFrees++;
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delete (mem);
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m_numFrees++;
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m_fileCache.remove(name);
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}
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}
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}
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char* allocateBuffer(int len)
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{
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char* buffer = 0;
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if (len)
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{
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m_numAllocs++;
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buffer = new char[len];
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}
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return buffer;
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}
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void freeBuffer(char* buffer)
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{
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delete[] buffer;
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}
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virtual int registerFile(const char* fileName, char* buffer, int len)
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{
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m_numAllocs++;
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InMemoryFile* f = new InMemoryFile();
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f->m_buffer = buffer;
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f->m_fileSize = len;
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b3HashString key(fileName);
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m_fileCache.insert(key,f);
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return 0;
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}
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void removeFileFromCache(const char* fileName)
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{
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InMemoryFile* f = getInMemoryFile(fileName);
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if (f)
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{
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m_fileCache.remove(fileName);
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freeBuffer(f->m_buffer);
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delete (f);
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}
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}
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InMemoryFile* getInMemoryFile(const char* fileName)
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{
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InMemoryFile** fPtr = m_fileCache[fileName];
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if (fPtr && *fPtr)
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{
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return *fPtr;
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}
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return 0;
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}
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virtual int fileOpen(const char* fileName, const char* mode)
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{
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//search a free slot
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int slot = -1;
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for (int i=0;i<B3_FILEIO_MAX_FILES;i++)
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{
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if (m_fileHandles[i].m_file==0)
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{
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slot=i;
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break;
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}
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}
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if (slot>=0)
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{
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InMemoryFile* f = getInMemoryFile(fileName);
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if (f)
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{
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m_fileHandles[slot].m_curPos = 0;
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m_fileHandles[slot].m_file = f;
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} else
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{
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slot=-1;
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}
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}
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//printf("InMemoryFileIO fileOpen %s, %d\n", fileName, slot);
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return slot;
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}
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virtual int fileRead(int fileHandle, char* destBuffer, int numBytes)
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{
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if (fileHandle>=0 && fileHandle < B3_FILEIO_MAX_FILES)
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{
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InMemoryFileAccessor& f = m_fileHandles[fileHandle];
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if (f.m_file)
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{
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//if (numBytes>1)
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// printf("curPos = %d\n", f.m_curPos);
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if (f.m_curPos+numBytes <= f.m_file->m_fileSize)
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{
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memcpy(destBuffer,f.m_file->m_buffer+f.m_curPos,numBytes);
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f.m_curPos+=numBytes;
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//if (numBytes>1)
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// printf("read %d bytes, now curPos = %d\n", numBytes, f.m_curPos);
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return numBytes;
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} else
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{
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if (numBytes!=1)
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{
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printf("InMemoryFileIO::fileRead Attempt to read beyond end of file\n");
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}
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}
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}
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}
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return 0;
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}
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virtual int fileWrite(int fileHandle,const char* sourceBuffer, int numBytes)
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{
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return 0;
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}
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virtual void fileClose(int fileHandle)
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{
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if (fileHandle>=0 && fileHandle < B3_FILEIO_MAX_FILES)
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{
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InMemoryFileAccessor& f = m_fileHandles[fileHandle];
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if (f.m_file)
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{
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m_fileHandles[fileHandle].m_file = 0;
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m_fileHandles[fileHandle].m_curPos = 0;
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//printf("InMemoryFileIO fileClose %d\n", fileHandle);
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}
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}
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}
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virtual bool findResourcePath(const char* fileName, char* resourcePathOut, int resourcePathMaxNumBytes)
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{
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InMemoryFile* f = getInMemoryFile(fileName);
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int fileNameLen = strlen(fileName);
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if (f && fileNameLen<(resourcePathMaxNumBytes-1))
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{
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memcpy(resourcePathOut, fileName, fileNameLen);
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resourcePathOut[fileNameLen]=0;
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return true;
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}
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return false;
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}
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virtual char* readLine(int fileHandle, char* destBuffer, int numBytes)
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{
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int numRead = 0;
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int endOfFile = 0;
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if (fileHandle>=0 && fileHandle < B3_FILEIO_MAX_FILES )
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{
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InMemoryFileAccessor& f = m_fileHandles[fileHandle];
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if (f.m_file)
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{
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//return ::fgets(destBuffer, numBytes, m_fileHandles[fileHandle]);
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char c = 0;
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do
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{
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int bytesRead = fileRead(fileHandle,&c,1);
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if (bytesRead != 1)
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{
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endOfFile = 1;
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c=0;
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}
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if (c && c!='\n')
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{
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if (c!=13)
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{
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destBuffer[numRead++]=c;
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} else
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{
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destBuffer[numRead++]=0;
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}
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}
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} while (c != 0 && c != '\n' && numRead<(numBytes-1));
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}
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}
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if (numRead==0 && endOfFile)
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{
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return 0;
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}
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if (numRead<numBytes)
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{
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if (numRead >=0)
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{
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destBuffer[numRead]=0;
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}
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return &destBuffer[0];
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} else
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{
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if (endOfFile==0)
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{
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printf("InMemoryFileIO::readLine readLine warning: numRead=%d, numBytes=%d\n", numRead, numBytes);
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}
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}
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return 0;
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}
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virtual int getFileSize(int fileHandle)
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{
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if (fileHandle>=0 && fileHandle < B3_FILEIO_MAX_FILES )
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{
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InMemoryFileAccessor& f = m_fileHandles[fileHandle];
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if (f.m_file)
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{
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return f.m_file->m_fileSize;
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}
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}
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return 0;
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}
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virtual void enableFileCaching(bool enable)
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{
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(void)enable;
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}
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};
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struct WrapperFileIO : public CommonFileIOInterface
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{
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CommonFileIOInterface* m_availableFileIOInterfaces[B3_MAX_FILEIO_INTERFACES];
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int m_numWrapperInterfaces;
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WrapperFileHandle m_wrapperFileHandles[B3_MAX_FILEIO_INTERFACES];
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InMemoryFileIO m_cachedFiles;
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bool m_enableFileCaching;
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WrapperFileIO()
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:CommonFileIOInterface(0,0),
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m_numWrapperInterfaces(0),
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m_enableFileCaching(true)
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{
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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m_availableFileIOInterfaces[i]=0;
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m_wrapperFileHandles[i].childFileIO=0;
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m_wrapperFileHandles[i].m_childFileHandle=0;
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}
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//addFileIOInterface(&m_cachedFiles);
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}
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virtual ~WrapperFileIO()
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{
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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removeFileIOInterface(i);
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}
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m_cachedFiles.clearCache();
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}
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int addFileIOInterface(CommonFileIOInterface* fileIO)
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{
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int result = -1;
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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if (m_availableFileIOInterfaces[i]==0)
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{
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m_availableFileIOInterfaces[i]=fileIO;
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result = i;
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break;
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}
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}
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return result;
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}
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CommonFileIOInterface* getFileIOInterface(int fileIOIndex)
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{
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if (fileIOIndex>=0 && fileIOIndex<B3_MAX_FILEIO_INTERFACES)
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{
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return m_availableFileIOInterfaces[fileIOIndex];
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}
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return 0;
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}
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void removeFileIOInterface(int fileIOIndex)
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{
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if (fileIOIndex>=0 && fileIOIndex<B3_MAX_FILEIO_INTERFACES)
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{
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if (m_availableFileIOInterfaces[fileIOIndex])
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{
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delete m_availableFileIOInterfaces[fileIOIndex];
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m_availableFileIOInterfaces[fileIOIndex]=0;
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}
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}
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}
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virtual int fileOpen(const char* fileName, const char* mode)
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{
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//find an available wrapperFileHandle slot
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int wrapperFileHandle=-1;
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int slot = -1;
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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if (m_wrapperFileHandles[i].childFileIO==0)
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{
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slot=i;
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break;
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}
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}
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if (slot>=0)
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{
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//first check the cache
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int cacheHandle = m_cachedFiles.fileOpen(fileName, mode);
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if (cacheHandle>=0)
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{
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m_cachedFiles.fileClose(cacheHandle);
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}
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if (cacheHandle<0)
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{
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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CommonFileIOInterface* childFileIO=m_availableFileIOInterfaces[i];
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if (childFileIO)
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{
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int childHandle = childFileIO->fileOpen(fileName, mode);
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if (childHandle>=0)
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{
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if (m_enableFileCaching)
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{
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int fileSize = childFileIO->getFileSize(childHandle);
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char* buffer = 0;
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if (fileSize)
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{
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buffer = m_cachedFiles.allocateBuffer(fileSize);
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if (buffer)
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{
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int readBytes = childFileIO->fileRead(childHandle, buffer, fileSize);
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if (readBytes!=fileSize)
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{
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if (readBytes<fileSize)
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{
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fileSize = readBytes;
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} else
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{
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printf("WrapperFileIO error: reading more bytes (%d) then reported file size (%d) of file %s.\n", readBytes, fileSize, fileName);
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}
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}
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} else
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{
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fileSize=0;
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}
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}
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//potentially register a zero byte file, or files that only can be read partially
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m_cachedFiles.registerFile(fileName, buffer, fileSize);
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}
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childFileIO->fileClose(childHandle);
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break;
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}
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}
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}
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}
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{
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int childHandle = m_cachedFiles.fileOpen(fileName, mode);
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if (childHandle>=0)
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{
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wrapperFileHandle = slot;
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m_wrapperFileHandles[slot].childFileIO = &m_cachedFiles;
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m_wrapperFileHandles[slot].m_childFileHandle = childHandle;
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} else
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{
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//figure out what wrapper interface to use
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//use the first one that can open the file
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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CommonFileIOInterface* childFileIO=m_availableFileIOInterfaces[i];
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if (childFileIO)
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{
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int childHandle = childFileIO->fileOpen(fileName, mode);
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if (childHandle>=0)
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{
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wrapperFileHandle = slot;
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m_wrapperFileHandles[slot].childFileIO = childFileIO;
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m_wrapperFileHandles[slot].m_childFileHandle = childHandle;
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break;
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}
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}
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}
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}
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}
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}
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return wrapperFileHandle;
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}
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virtual int fileRead(int fileHandle, char* destBuffer, int numBytes)
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{
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int fileReadResult=-1;
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if (fileHandle>=0 && fileHandle<B3_MAX_FILEIO_INTERFACES)
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{
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if (m_wrapperFileHandles[fileHandle].childFileIO)
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{
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fileReadResult = m_wrapperFileHandles[fileHandle].childFileIO->fileRead(
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m_wrapperFileHandles[fileHandle].m_childFileHandle, destBuffer, numBytes);
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}
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}
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return fileReadResult;
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}
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virtual int fileWrite(int fileHandle,const char* sourceBuffer, int numBytes)
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{
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//todo
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return -1;
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}
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virtual void fileClose(int fileHandle)
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{
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if (fileHandle>=0 && fileHandle<B3_MAX_FILEIO_INTERFACES)
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{
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if (m_wrapperFileHandles[fileHandle].childFileIO)
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{
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m_wrapperFileHandles[fileHandle].childFileIO->fileClose(
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m_wrapperFileHandles[fileHandle].m_childFileHandle);
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m_wrapperFileHandles[fileHandle].childFileIO = 0;
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m_wrapperFileHandles[fileHandle].m_childFileHandle = -1;
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}
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}
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}
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virtual bool findResourcePath(const char* fileName, char* resourcePathOut, int resourcePathMaxNumBytes)
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{
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if (m_cachedFiles.findResourcePath(fileName, resourcePathOut, resourcePathMaxNumBytes))
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return true;
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bool found = false;
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for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
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{
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if (m_availableFileIOInterfaces[i])
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{
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found = m_availableFileIOInterfaces[i]->findResourcePath(fileName, resourcePathOut, resourcePathMaxNumBytes);
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}
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if (found)
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break;
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}
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return found;
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}
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virtual char* readLine(int fileHandle, char* destBuffer, int numBytes)
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{
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char* result = 0;
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if (fileHandle>=0 && fileHandle<B3_MAX_FILEIO_INTERFACES)
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{
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if (m_wrapperFileHandles[fileHandle].childFileIO)
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{
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result = m_wrapperFileHandles[fileHandle].childFileIO->readLine(
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m_wrapperFileHandles[fileHandle].m_childFileHandle,
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destBuffer, numBytes);
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}
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}
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return result;
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}
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virtual int getFileSize(int fileHandle)
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{
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int numBytes = 0;
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if (fileHandle>=0 && fileHandle<B3_MAX_FILEIO_INTERFACES)
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{
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if (m_wrapperFileHandles[fileHandle].childFileIO)
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{
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numBytes = m_wrapperFileHandles[fileHandle].childFileIO->getFileSize(
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m_wrapperFileHandles[fileHandle].m_childFileHandle);
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}
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}
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return numBytes;
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}
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virtual void enableFileCaching(bool enable)
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{
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m_enableFileCaching = enable;
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if (!enable)
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{
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m_cachedFiles.clearCache();
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}
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}
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};
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struct FileIOClass
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{
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int m_testData;
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WrapperFileIO m_fileIO;
|
|
|
|
FileIOClass()
|
|
: m_testData(42),
|
|
m_fileIO()
|
|
{
|
|
}
|
|
virtual ~FileIOClass()
|
|
{
|
|
}
|
|
};
|
|
|
|
B3_SHARED_API int initPlugin_fileIOPlugin(struct b3PluginContext* context)
|
|
{
|
|
FileIOClass* obj = new FileIOClass();
|
|
context->m_userPointer = obj;
|
|
|
|
#ifndef B3_EXCLUDE_DEFAULT_FILEIO
|
|
obj->m_fileIO.addFileIOInterface(new b3BulletDefaultFileIO());
|
|
#endif //B3_EXCLUDE_DEFAULT_FILEIO
|
|
|
|
|
|
return SHARED_MEMORY_MAGIC_NUMBER;
|
|
}
|
|
|
|
|
|
B3_SHARED_API int executePluginCommand_fileIOPlugin(struct b3PluginContext* context, const struct b3PluginArguments* arguments)
|
|
{
|
|
int result=-1;
|
|
|
|
FileIOClass* obj = (FileIOClass*)context->m_userPointer;
|
|
|
|
printf("text argument:%s\n", arguments->m_text);
|
|
printf("int args: [");
|
|
|
|
//remove a fileIO type
|
|
if (arguments->m_numInts==1)
|
|
{
|
|
int fileIOIndex = arguments->m_ints[0];
|
|
obj->m_fileIO.removeFileIOInterface(fileIOIndex);
|
|
}
|
|
|
|
if (arguments->m_numInts==2)
|
|
{
|
|
int action = arguments->m_ints[0];
|
|
switch (action)
|
|
{
|
|
case eAddFileIOAction:
|
|
{
|
|
//if the fileIO already exists, skip this action
|
|
int fileIOType = arguments->m_ints[1];
|
|
bool alreadyExists = false;
|
|
|
|
for (int i=0;i<B3_MAX_FILEIO_INTERFACES;i++)
|
|
{
|
|
CommonFileIOInterface* fileIO = obj->m_fileIO.getFileIOInterface(i);
|
|
if (fileIO)
|
|
{
|
|
if (fileIO->m_fileIOType == fileIOType)
|
|
{
|
|
if (fileIO->m_pathPrefix && strcmp(fileIO->m_pathPrefix,arguments->m_text)==0)
|
|
{
|
|
result = i;
|
|
alreadyExists = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//create new fileIO interface
|
|
if (!alreadyExists)
|
|
{
|
|
switch (fileIOType)
|
|
{
|
|
case ePosixFileIO:
|
|
{
|
|
#ifdef B3_EXCLUDE_DEFAULT_FILEIO
|
|
printf("ePosixFileIO is not enabled in this build.\n");
|
|
#else
|
|
result = obj->m_fileIO.addFileIOInterface(new b3BulletDefaultFileIO(ePosixFileIO, arguments->m_text));
|
|
#endif
|
|
break;
|
|
}
|
|
case eZipFileIO:
|
|
{
|
|
#ifdef B3_USE_ZIPFILE_FILEIO
|
|
if (arguments->m_text[0])
|
|
{
|
|
result = obj->m_fileIO.addFileIOInterface(new ZipFileIO(eZipFileIO, arguments->m_text, &obj->m_fileIO));
|
|
}
|
|
#else
|
|
printf("eZipFileIO is not enabled in this build.\n");
|
|
#endif
|
|
break;
|
|
}
|
|
case eCNSFileIO:
|
|
{
|
|
#ifdef B3_USE_CNS_FILEIO
|
|
result = obj->m_fileIO.addFileIOInterface(new CNSFileIO(eCNSFileIO, arguments->m_text));
|
|
#else//B3_USE_CNS_FILEIO
|
|
printf("CNSFileIO is not enabled in this build.\n");
|
|
#endif //B3_USE_CNS_FILEIO
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
}
|
|
}//switch (fileIOType)
|
|
}//if (!alreadyExists)
|
|
break;
|
|
}
|
|
case eRemoveFileIOAction:
|
|
|
|
{
|
|
//remove fileIO interface
|
|
int fileIOIndex = arguments->m_ints[1];
|
|
obj->m_fileIO.removeFileIOInterface(fileIOIndex);
|
|
result = fileIOIndex;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
printf("executePluginCommand_fileIOPlugin: unknown action\n");
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
B3_SHARED_API struct CommonFileIOInterface* getFileIOFunc_fileIOPlugin(struct b3PluginContext* context)
|
|
{
|
|
FileIOClass* obj = (FileIOClass*)context->m_userPointer;
|
|
return &obj->m_fileIO;
|
|
}
|
|
|
|
B3_SHARED_API void exitPlugin_fileIOPlugin(struct b3PluginContext* context)
|
|
{
|
|
FileIOClass* obj = (FileIOClass*)context->m_userPointer;
|
|
delete obj;
|
|
context->m_userPointer = 0;
|
|
}
|