June 4, 1993 MEMCHR 3

### NAME

memchr - locate byte in byte string

### LIBRARY

Standard C Library (libc, -lc)

### SYNOPSIS

```void``*` memchr(```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`.

### RETURN VALUES

The memchr(``) function returns a pointer to the byte located, or ```NULL` if no such byte exists within ```len` bytes.

### SEE ALSO

index(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3)

### STANDARDS

The memchr(``) function conforms to ANSI X3.159-1989 (``ANSI C89'') .