added forgotten files

stdfilesystems/filesystem_libc.cpp

@@ -0,0 +1,124 @@
+#include "tier2/ifilesystem.h"
+#include "tier1/interface.h"
+#include "tier0/lib.h"
+#include "errno.h"
+
+class CLIBCFileHandle : public IFileHandle
+{
+public:
+	FILE *m_pFile;
+	size_t m_nSize;
+
+};
+
+class CLIBCFileSystem : public IFileSystem
+{
+public:
+	virtual void Init() override {
+	
+	};
+	virtual void Shutdown() override {};
+
+	virtual IFileHandle *Open( const char *szFileName, int eOpCode ) override 
+	{
+		const char *szOperation;
+		FILE *pFile;
+		CLIBCFileHandle *pHandle = NULL;
+
+		switch (eOpCode)
+		{
+		case FILEMODE_READ:
+			szOperation = "rb";
+			break;
+		case FILEMODE_WRITE:
+			szOperation = "wb";
+			break;
+		default:
+			V_printf("Operation is not supported\n");
+			break;
+		}
+
+		pFile = V_fopen(szFileName, szOperation);
+		if (!pFile)
+		{
+			return NULL;
+		}
+
+		pHandle = new CLIBCFileHandle;
+		pHandle->m_pFileSystem = this;
+		pHandle->m_pFile = pFile;
+		Seek(pHandle,SEEKMODE_RELATIVE_END, 0);
+		pHandle->m_nSize = Tell(pHandle);
+		Seek(pHandle, SEEKMODE_RELATIVE_START, 0);
+		return pHandle;
+	}
+	virtual size_t Write( IFileHandle *pFile, const void *pData, size_t nDataSize ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		if (!pHandle)
+			return 0;
+		return V_fwrite( pData, 1, nDataSize, pHandle->m_pFile);
+	}
+	virtual size_t Read( IFileHandle *pFile, void *pData, size_t nDataSize ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		if (!pHandle)
+			return 0;
+		return V_fread( pData, 1, nDataSize, pHandle->m_pFile );
+	}
+
+	virtual size_t Seek( IFileHandle *pFile, ESeekMode eSeekMode, size_t nOffset ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		int eLibcSeekMode = 0;
+		
+		if (!pHandle)
+			return 0;
+
+		switch (eSeekMode) {
+		case SEEKMODE_RELATIVE_CURRENT:
+			eLibcSeekMode = SEEK_CUR;
+			break;
+		case SEEKMODE_RELATIVE_END:
+			eLibcSeekMode = SEEK_END;
+			break;
+		case SEEKMODE_RELATIVE_START:
+			eLibcSeekMode = SEEK_SET;
+			break;
+		}
+
+		return V_fseek( pHandle->m_pFile, nOffset, eLibcSeekMode );
+	}
+
+	virtual size_t Tell( IFileHandle *pFile ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		if (!pHandle)
+			return 0;
+		return V_ftell(pHandle->m_pFile);
+	}
+	
+	virtual size_t Size( IFileHandle *pFile ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		if (!pHandle)
+			return 0;
+		return pHandle->m_nSize;
+	}
+
+
+
+	virtual void Close( IFileHandle *pFile ) override
+	{
+		CLIBCFileHandle *pHandle = (CLIBCFileHandle*)pFile;
+		if (!pHandle)
+			return;
+		V_fclose(pHandle->m_pFile);
+		delete pHandle;
+	}
+
+	virtual CUtlBuffer<unsigned char> Read( IFileHandle *pFile ) override { return NULL; }; 
+	virtual const char *ReadString( IFileHandle *pFile ) override { return NULL; };
+};
+
+EXPOSE_INTERFACE(CLIBCFileSystem, IFileSystem, FILESYSTEM_INTERFACE_VERSION)