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public/dt_utlvector_common.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef DT_UTLVECTOR_COMMON_H
+#define DT_UTLVECTOR_COMMON_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "utlvector.h"
+
+
+typedef void (*EnsureCapacityFn)( void *pVoid, int offsetToUtlVector, int len );
+typedef void (*ResizeUtlVectorFn)( void *pVoid, int offsetToUtlVector, int len );
+
+template< class T >
+void UtlVector_InitializeAllocatedElements( T *pBase, int count )
+{
+	memset( reinterpret_cast<void*>( pBase ), 0, count * sizeof( T ) );
+}
+
+template< class T, class A >
+class UtlVectorTemplate
+{
+public:
+	static void ResizeUtlVector( void *pStruct, int offsetToUtlVector, int len )
+	{
+		CUtlVector<T,A> *pVec = (CUtlVector<T,A>*)((char*)pStruct + offsetToUtlVector);
+		if ( pVec->Count() < len )
+			pVec->AddMultipleToTail( len - pVec->Count() );
+		else if ( pVec->Count() > len )
+			pVec->RemoveMultiple( len, pVec->Count()-len );
+
+		// Ensure capacity
+		pVec->EnsureCapacity( len );
+
+		int nNumAllocated = pVec->NumAllocated();
+
+		// This is important to do because EnsureCapacity doesn't actually call the constructors
+		// on the elements, but we need them to be initialized, otherwise it'll have out-of-range
+		// values which will piss off the datatable encoder.
+		UtlVector_InitializeAllocatedElements( pVec->Base() + pVec->Count(), nNumAllocated - pVec->Count() );
+	}
+
+	static void EnsureCapacity( void *pStruct, int offsetToUtlVector, int len )
+	{
+		CUtlVector<T,A> *pVec = (CUtlVector<T,A>*)((char*)pStruct + offsetToUtlVector);
+
+		pVec->EnsureCapacity( len );
+		
+		int nNumAllocated = pVec->NumAllocated();
+
+		// This is important to do because EnsureCapacity doesn't actually call the constructors
+		// on the elements, but we need them to be initialized, otherwise it'll have out-of-range
+		// values which will piss off the datatable encoder.
+		UtlVector_InitializeAllocatedElements( pVec->Base() + pVec->Count(), nNumAllocated - pVec->Count() );
+	}
+};
+
+template< class T, class A >
+inline ResizeUtlVectorFn GetResizeUtlVectorTemplate( CUtlVector<T,A> &vec )
+{
+	return &UtlVectorTemplate<T,A>::ResizeUtlVector;
+}
+
+template< class T, class A >
+inline EnsureCapacityFn GetEnsureCapacityTemplate( CUtlVector<T,A> &vec )
+{
+	return &UtlVectorTemplate<T,A>::EnsureCapacity;
+}
+
+
+// Format and allocate a string.
+char* AllocateStringHelper( PRINTF_FORMAT_STRING const char *pFormat, ... );
+
+// Allocates a string for a data table name. Data table names must be unique, so this will
+// assert if you try to allocate a duplicate.
+char* AllocateUniqueDataTableName( bool bSendTable, PRINTF_FORMAT_STRING const char *pFormat, ... );
+
+
+#endif // DT_UTLVECTOR_COMMON_H