NAME
memchr, memrchr
— locate byte in byte
string
SYNOPSIS
#include
<string.h>
void *
memchr(const
void *b, int c,
size_t len);
void *
memrchr(const
void *b, int c,
size_t len);
DESCRIPTION
The
memchr()
function locates the first occurrence of c (converted
to an unsigned char) in string
b.
The
memrchr()
function behaves like memchr(), except that it
locates the last occurrence of c in string
b.
RETURN VALUES
The memchr() and
memrchr() functions return a pointer to the byte
located, or NULL if no such byte exists within
len bytes.
SEE ALSO
strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), wmemchr(3)
STANDARDS
The memchr() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
The memrchr() function is an
OpenBSD extension.
HISTORY
The memchr() function first appeared in
AT&T System V UNIX and was reimplemented
for 4.3BSD-Tahoe.