113 lines
2.3 KiB
C++
113 lines
2.3 KiB
C++
#include "tier2/ifilesystem.h"
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#include "tier1/interface.h"
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#include "tier0/lib.h"
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class CLIBCFileHandle : public IFileHandle
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{
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public:
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FILE *m_pFile;
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size_t m_nSize;
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};
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class CLIBCFileSystem : public IFileSystem
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{
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public:
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virtual void Init() override {
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};
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virtual void Shutdown() override {};
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virtual IFileHandle *Open( const char *szFileName, int eOpCode ) override
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{
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const char *szOperation;
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FILE *pFile;
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CLIBCFileHandle *pHandle = NULL;
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switch (eOpCode)
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{
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case FILEMODE_READ:
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szOperation = "rb";
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break;
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default:
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V_printf("Operation is not supported\n");
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break;
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}
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pFile = V_fopen(szFileName, szOperation);
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if (!pFile)
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return NULL;
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pHandle = new CLIBCFileHandle;
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pHandle->m_pFileSystem = this;
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pHandle->m_pFile = pFile;
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pHandle->Seek(SEEKMODE_RELATIVE_END, 0);
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pHandle->m_nSize = pHandle->Tell();
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pHandle->Seek(SEEKMODE_RELATIVE_START, 0);
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return pHandle;
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}
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virtual size_t Write( IFileHandle *pFile, const void *pData, size_t nDataSize ) override
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{
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return 0;
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}
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virtual size_t Read( IFileHandle *pFile, void *pData, size_t nDataSize ) override
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{
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CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
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if (!pHandle)
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return 0;
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return V_fread( pData, 1, nDataSize, pHandle->m_pFile );
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}
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virtual size_t Seek( IFileHandle *pFile, ESeekMode eSeekMode, size_t nOffset ) override
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{
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CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
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int eLibcSeekMode = 0;
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if (!pHandle)
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return 0;
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switch (eSeekMode) {
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case SEEKMODE_RELATIVE_CURRENT:
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eLibcSeekMode = SEEK_CUR;
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break;
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case SEEKMODE_RELATIVE_END:
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eLibcSeekMode = SEEK_END;
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break;
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case SEEKMODE_RELATIVE_START:
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eLibcSeekMode = SEEK_SET;
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break;
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}
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return V_fseek( pHandle->m_pFile, nOffset, eLibcSeekMode );
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}
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virtual size_t Tell( IFileHandle *pFile ) override
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{
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CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
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if (!pHandle)
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return 0;
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return V_ftell(pHandle->m_pFile);
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}
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virtual size_t Size( IFileHandle *pFile ) override
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{
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CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
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if (!pHandle)
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return 0;
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return pHandle->m_nSize;
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}
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virtual void Close( IFileHandle *pFile ) override
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{
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CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
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if (!pHandle)
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return;
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V_fclose(pHandle->m_pFile);
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delete pHandle;
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}
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};
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EXPOSE_FILESYSTEM(CLIBCFileSystem, "sysfs");
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