| STRSTR(3bsd) | 3bsd | STRSTR(3bsd) |
strnstr — locate a
substring in a string
library “libbsd”
#include
<string.h> (See libbsd(7)
for include usage.)
char *
strnstr(const
char *big, const char
*little, size_t
len);
The
strnstr()
function locates the first occurrence of the null-terminated string
little in the string big, where
not more than len characters are searched. Characters
that appear after a ‘\0’ character are
not searched. Since the strnstr() function is a
FreeBSD specific API, it should only be used when
portability is not a concern.
If little is an empty string,
big is returned; if little
occurs nowhere in big, NULL is
returned; otherwise a pointer to the first character of the first occurrence
of little is returned.
The following sets the pointer ptr to
NULL, because only the first 4 characters of
largestring are searched:
const char *largestring = "Foo Bar Baz"; const char *smallstring = "Bar"; char *ptr; ptr = strnstr(largestring, smallstring, 4);
strstr(3), strcasestr(3), memchr(3), memmem(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strtok(3), wcsstr(3)
| October 11, 2001 | Debian |