MEMORY(3C) — HP-UX

NAME

memccpy, memchr, memcmp, memcpy, memset − memory operations

SYNOPSIS

#include <memory.h>

char ∗memccpy (s1, s2, c, n)
char ∗s1, ∗s2;
int c, n;

char ∗memchr (s, c, n)
char ∗s;
int c, n;

int memcmp (s1, s2, n)
char ∗s1, ∗s2;
int n;

char ∗memcpy (s1, s2, n)
char ∗s1, ∗s2;
int n;

char ∗memset (s, c, n)
char ∗s;
int c, n;

DESCRIPTION

These functions operate as efficiently as possible on memory areas (arrays of characters bounded by a count, not terminated by a null character). They do not check for the overflow of any receiving memory area.

Memccpy copies characters from memory area s2 into s1, stopping after the first occurrence of character c has been copied, or after n characters have been copied, whichever comes first. It returns a pointer to the character after the copy of c in s1, or a NULL pointer if c was not found in the first n characters of s2.

Memchr returns a pointer to the first occurrence of character c in the first n characters of memory area s, or a NULL pointer if c does not occur.

Memcmp compares its arguments, looking at the first n characters only, and returns an integer less than, equal to, or greater than 0, according as s1 is lexicographically less than, equal to, or greater than s2. (n less than or equal to zero yields equality). This routine uses unsigned char for character comparison on HP-UX. This may not be true for other implementations.

Memcpy copies n characters from memory area s2 to s1. It returns s1.

Memset sets the first n characters in memory area s to the value of character c. It returns s.

NOTE

For user convenience, all these functions are declared in the optional <memory.h> header file.

BUGS

Character movement is performed differently in different implementations. Thus overlapping moves may yield surprises.