memcmp.c File Reference

Defines the memcmp function. More...

#include <string.h>

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Functions
int	memcmp (const void *s1, const void *s2, size_t n)
	Compares the first n characters of s1 and s2. More...

Detailed Description

Defines the memcmp function.

Definition in file memcmp.c.

Function Documentation

memcmp()

int memcmp	(	const void *	s1,
		const void *	s2,
		size_t	n
	)

Compares the first n characters of s1 and s2.

Parameters

*s1	The first object to be compared
*s2	The second object to be compared
n	The number of characters to compare

The memcmp function compares the first n characters of the object pointed to by s1 to the first n characters of the object pointed to by s2.

Note

The contents of "holes" used as padding for purposes of alignment within structure objects are indeterminate. Strings shorter than their allocated space and unions may also cause problems in comparison.

If n is 0 then valid objects are considered equal

The returned value will never be greater than UCHAR_MAX and never less than CHAR_MIN

If the comparison will cause a memory read that wraps then the comparison will not take place

Returns

Integer indicating if s1 is greater than, equal to, or less than s2

Return values

>0	s1 is greater than s2 or no comparison could be made
0	s1 is equal to s2
<0	s1 is less than s2

Definition at line 68 of file memcmp.c.

Referenced by strcmp(), and strncmp().

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