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STRSTR(3) | Library Functions Manual | STRSTR(3) |
NAME¶
strnstr
—
locate a substring in a string
LIBRARY¶
library “libbsd”SYNOPSIS¶
#include
<bsd/string.h>
char *
strnstr
(const
char *big, const
char *little,
size_t len);
DESCRIPTION¶
Thestrnstr
() 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.
RETURN VALUES¶
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.
EXAMPLES¶
The following sets the pointer ptr toNULL
, 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);
SEE ALSO¶
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 |