NAME

memchr —

locate byte in byte string

LIBRARY

Standard C Library (libc, -lc)

#include <string.h>

void *
memchr(const void *b, int c, size_t len);

void *
memrchr(const void *b, int c, size_t len);

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.

The memchr() and memrchr() functions return a pointer to the byte located, or NULL if no such byte exists within len bytes.

The memchr() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

The memrchr() function is a GNU extension and conforms to no standard.

The memrchr() function first appeared in GNU libc 2.1.91, this implementation first appeared in FreeBSD 6.4, coming from OpenBSD 4.3.