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/* $Id$ */

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/** @file mem_func.hpp Functions related to memory operations. */

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#ifndef MEM_FUNC_HPP

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#define MEM_FUNC_HPP

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#include <string.h>

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#include "math_func.hpp"

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/**

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 * Type-safe version of memcpy().

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 *

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 * @param destination Pointer to the destination buffer

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 * @param source Pointer to the source buffer

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 * @param num number of items to be copied. (!not number of bytes!)

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 */

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template <typename T>

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FORCEINLINE void MemCpyT(T *destination, const T *source, uint num = 1)

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{

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	memcpy(destination, source, num * sizeof(T));

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}

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/**

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 * Type-safe version of memmove().

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 *

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 * @param destination Pointer to the destination buffer

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 * @param source Pointer to the source buffer

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 * @param num number of items to be copied. (!not number of bytes!)

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 */

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template <typename T>

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FORCEINLINE void MemMoveT(T *destination, const T *source, uint num = 1)

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{

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	memmove(destination, source, num * sizeof(T));

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}

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/**

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 * Type-safe version of memset().

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 *

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 * @param ptr Pointer to the destination buffer

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 * @param value Value to be set

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 * @param num number of items to be set (!not number of bytes!)

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 */

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template <typename T>

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FORCEINLINE void MemSetT(T *ptr, int value, uint num = 1)

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{

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	memset(ptr, value, num * sizeof(T));

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}

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/**

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 * Type-safe version of memcmp().

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 *

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 * @param ptr1 Pointer to the first buffer

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 * @param ptr2 Pointer to the second buffer

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 * @param num Number of items to compare. (!not number of bytes!)

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 * @return an int value indicating the relationship between the content of the two buffers

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 */

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template <typename T>

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FORCEINLINE int MemCmpT(const T *ptr1, const T *ptr2, uint num = 1)

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{

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	return memcmp(ptr1, ptr2, num * sizeof(T));

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}

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/**

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 * Type safe memory reverse operation.

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 *  Reverse a block of memory in steps given by the

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 *  type of the pointers.

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 *

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 * @param ptr1 Start-pointer to the block of memory.

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 * @param ptr2 End-pointer to the block of memory.

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 */

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template<typename T>

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FORCEINLINE void MemReverseT(T *ptr1, T *ptr2)

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{

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	assert(ptr1 != NULL && ptr2 != NULL);

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	assert(ptr1 < ptr2);

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	do {

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		Swap(*ptr1, *ptr2);

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	} while (++ptr1 < --ptr2);

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}

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/**

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 * Type safe memory reverse operation (overloaded)

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 *

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 * @param ptr Pointer to the block of memory.

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 * @param num The number of items we want to reverse.

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 */

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template<typename T>

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FORCEINLINE void MemReverseT(T *ptr, uint num)

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{

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	assert(ptr != NULL);

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	MemReverseT(ptr, ptr + (num - 1));

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}

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#endif /* MEM_FUNC_HPP */