NAME
memchr —
locate byte in byte string
LIBRARY
library “libc”
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
Thememchr()
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
memmem(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), wmemchr(3)
STANDARDS
The memchr() function conforms to
ISO/IEC 9899:1990
(“ISO C90”).
The memrchr() function is a GNU extension
and conforms to no standard.
HISTORY
The memrchr() function first appeared in
GNU libc 2.1.91, this implementation first appeared in
FreeBSD 6.4, coming from OpenBSD
4.3.