memory.h File Reference

#include <stddef.h>

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Functions
void *	memset (void *ptr, int c, size_t size)
	Sets first bytes of memory pointed to specified value.
void *	memcpy (void *dstptr, const void *srcptr, size_t size)
	Copies memory from one place to another.
int	memcmp (void *ptr1, void *ptr2, size_t len)
	Compares the first num bytes of the block of memory pointed by ptr1 to the first num bytes pointed by ptr2.

Function Documentation

memcmp()

int memcmp	(	void *	ptr1,
		void *	ptr2,
		size_t	len
	)

Compares the first num bytes of the block of memory pointed by ptr1 to the first num bytes pointed by ptr2.

Parameters

ptr1	Pointer to block of memory
ptr2	Pointer to block of memory
len	Number of bytes to compare

Returns

int

• 0 if matches,
• -1 the first byte that does not match in both memory blocks has a lower value in ptr1 than in ptr2,
• 1 the first byte that does not match in both memory blocks has a greater value in ptr1 than in ptr2

memcpy()

void * memcpy	(	void *	dstptr,
		const void *	srcptr,
		size_t	size
	)

Copies memory from one place to another.

Parameters

dstptr	Destination pointer
srcptr	Source pointer
size	Length of copied memory

Returns

void* Destination pointer

memset()

void * memset	(	void *	ptr,
		int	c,
		size_t	size
	)

Sets first bytes of memory pointed to specified value.

Parameters

ptr	Pointer to the block of memory to fill
c	Value to be set
size	Number of bytes to set

Returns

void* Pointer to the block of memory