NAME | SYNOPSIS | DESCRIPTION | ATTRIBUTES
#include <string.h>void * memccpy(void * s1, const void * s2, int c, size_t n);
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.
The memccpy function copies bytes from memory area s2 into s1, stopping after the first occurrence of c (converted to an unsigned char) has been copied, or after n bytes have been copied, whichever comes first. It returns a pointer to the byte after the copy of c in s1, or a null pointer if c was not found in the first n bytes of s2.
The memchr function returns a pointer to the first occurrence of c (converted to an unsigned char) in the first n bytes (each interpreted as an unsigned char) of memory area s , or a null pointer if c is not found.
The memcmp function compares its arguments, looking at the first n bytes (each interpreted as an unsigned only, and returns an integer less than, equal to, or greater than 0, depending on whether s1 is lexicographically less than, equal to, or greater than s2 when taken to be unsigned characters.
The memcpy function copies n bytes from memory area s2 to s1 . It returns s1
The memmove function copies n bytes from memory area s2 to s1 . Copying between objects that overlap will take place correctly. It returns s1 .
The memset function sets the first n characters in memory area s to the value of character c. It returns s.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
---|---|
Interface Stability | Evolving |
NAME | SYNOPSIS | DESCRIPTION | ATTRIBUTES