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ft_memcmp.c
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ft_memcmp.c
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/* ************************************************************************** */
/* */
/* :::::::: */
/* ft_memcmp.c :+: :+: */
/* +:+ */
/* By: dreijans <[email protected]> +#+ */
/* +#+ */
/* Created: 2022/10/19 17:54:30 by dreijans #+# #+# */
/* Updated: 2022/11/14 13:32:36 by dreijans ######## odam.nl */
/* */
/* ************************************************************************** */
#include <stddef.h>
int ft_memcmp(const void *s1, const void *s2, size_t n)
{
size_t i;
char *str1;
char *str2;
str1 = (char *)s1;
str2 = (char *)s2;
i = 0;
while (n > i)
{
if (str1[i] != str2[i])
{
return ((unsigned char)str1[i] - (unsigned char)str2[i]);
}
i++;
}
return (0);
}
/*
The memcmp() function compares byte string s1 against byte string s2.
Both strings are assumed to be n bytes long.
The memcmp() function returns zero if the two strings are identical
otherwise returns the difference between the first two differing bytes
(treated as unsigned char values, so that `\200' is greater than `\0',)
Zero-length strings are always identical.
This behavior is not required by C and
portable code should only depend on the sign of the returned value.
*/