redhat man page for memchr

MEMCHR(3)						     Linux Programmer's Manual							 MEMCHR(3)

NAME
       memchr, memrchr - scan memory for a character

SYNOPSIS
       #include <string.h>

       void *memchr(const void *s, int c, size_t n);

       void *memrchr(const void *s, int c, size_t n);

DESCRIPTION
       The  memchr()  function	scans the first n bytes of the memory area pointed to by s for the character c.  The first byte to match c (inter-
       preted as an unsigned character) stops the operation.

       The memrchr() function is like the memchr() function, except that it searches backwards from the end of the n bytes pointed to by s instead
       of forwards from the front.

RETURN VALUE
       The  memchr()  and  memrchr()  functions  return a pointer to the matching byte or NULL if the character does not occur in the given memory
       area.

CONFORMING TO
       The memchr() function conforms to SVID 3, BSD 4.3, ISO 9899, POSIX.  The memrchr() function is  a  GNU  extension,  available  since  glibc
       2.1.91.

SEE ALSO
       index(3), rindex(3), strchr(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3)

GNU
								    2002-02-20								 MEMCHR(3)