memmem − locate a substring
Standard C library (libc, −lc)
#define
_GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
void
*memmem(const void
haystack[.haystacklen], size_t
haystacklen,
const void needle[.needlelen],
size_t needlelen);
The memmem() function finds the start of the first occurrence of the substring needle of length needlelen in the memory area haystack of length haystacklen.
The memmem() function returns a pointer to the beginning of the substring, or NULL if the substring is not found.
For an explanation of the terms used in this section, see attributes(7). |
None.
musl libc 0.9.7; FreeBSD 6.0, OpenBSD 5.4, NetBSD, Illumos.
In glibc 2.0, if needle is empty, memmem() returns a pointer to the last byte of haystack. This is fixed in glibc 2.1.
bstring(3), strstr(3)