MEMMEM(3) Library Functions Manual MEMMEM(3)

NAME

memmem — find a byte subsequence in a byte sequence

SYNOPSIS

[CX]
#include <string.h>

void *memmem(const void *haystack, size_t haystacklen,
       const void *needle, size_t needlelen);

DESCRIPTION

The memmem () function shall locate the first occurrence of byte sequence needle of length needlelen in byte sequence haystack of length haystacklen.

RETURN VALUE

Upon successful completion, memmem () shall return a pointer to the the first byte of the located byte sequence in haystack, or a null pointer if the byte sequence is not found.

If needlelen is zero, the function shall return haystack.

If haystacklen is less than needlelen, the function shall return a null pointer.