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utils/studiomdl/filebuffer.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef FILEBUFFER_H
+#define FILEBUFFER_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier1/smartptr.h"
+#include "tier2/p4helpers.h"
+
+class CFileBuffer
+{
+public:
+	CFileBuffer( int size )
+	{
+		m_pData = new unsigned char[size];
+#ifdef _DEBUG
+		m_pUsed = new const char *[size];
+		memset( m_pUsed, 0, size * sizeof( const char * ) );
+#endif
+		m_Size = size;
+		m_pCurPos = m_pData;
+#ifdef _DEBUG
+		memset( m_pData, 0xbaadf00d, size );
+#endif
+	}
+	~CFileBuffer()
+	{
+		delete [] m_pData;
+#ifdef _DEBUG
+		delete [] m_pUsed;
+#endif
+	}
+
+#ifdef _DEBUG
+	void TestWritten( int EndOfFileOffset )
+	{
+		if ( !g_quiet )
+		{
+			printf( "testing to make sure that the whole file has been written\n" );
+		}
+		int i;
+		for( i = 0; i < EndOfFileOffset; i++ )
+		{
+			if( !m_pUsed[i] )
+			{
+				printf( "offset %d not written, end of file invalid!\n", i );
+				assert( 0 );
+			}
+		}
+	}
+#endif
+	
+	void WriteToFile( const char *fileName, int size )
+	{
+		CPlainAutoPtr< CP4File > spFile( g_p4factory->AccessFile( fileName ) );
+		spFile->Edit();
+		FILE *fp = fopen( fileName, "wb" );
+		if( !fp )
+		{
+			MdlWarning( "Can't open \"%s\" for writing!\n", fileName );
+			return;
+		}
+
+		fwrite( m_pData, 1, size, fp );
+		
+		fclose( fp );
+		spFile->Add();
+	}
+	
+	void WriteAt( int offset, void *data, int size, const char *name )
+	{
+//		printf( "WriteAt: \"%s\" offset: %d end: %d size: %d\n", name, offset, offset + size - 1, size );
+		m_pCurPos = m_pData + offset;
+
+#ifdef _DEBUG
+		int i;
+		const char **used = m_pUsed + offset;
+		bool bitched = false;
+		for( i = 0; i < size; i++ )
+		{
+			if( used[i] )
+			{
+				if( !bitched )
+				{
+					printf( "overwrite at %d! (overwriting \"%s\" with \"%s\")\n", i + offset, used[i], name );
+					assert( 0 );
+					bitched = true;
+				}
+			}
+			else
+			{
+				used[i] = name;
+			}
+		}
+#endif // _DEBUG
+
+		Append( data, size );
+	}
+	int GetOffset( void )
+	{
+		return m_pCurPos - m_pData;
+	}
+	void *GetPointer( int offset )
+	{
+		return m_pData + offset;
+	}
+private:
+	void Append( void *data, int size )
+	{
+		assert( m_pCurPos + size - m_pData < m_Size );
+		memcpy( m_pCurPos, data, size );
+		m_pCurPos += size;
+	}
+	CFileBuffer(); // undefined
+	int m_Size;
+	unsigned char *m_pData;
+	unsigned char *m_pCurPos;
+#ifdef _DEBUG
+	const char **m_pUsed;
+#endif
+};
+	
+
+#endif // FILEBUFFER_H