STRSTR(3) |
Library Functions Manual |
STRSTR(3) |
NAME
strstr, strcasestr — locate a substring in a string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
char *
strstr(const char *big, const char *little);
char *
strcasestr(const char *big, const char *little);
DESCRIPTION
The
strstr() function locates the first occurrence of the nul-terminated string
little in the nul-terminated string
big.
The strcasestr() function is similar to strstr(), but ignores the case of both strings.
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 to the “
Bar Baz
” portion of
largestring:
const char *largestring = "Foo Bar Baz";
const char *smallstring = "Bar";
char *ptr;
ptr = strstr(largestring, smallstring);
STANDARDS
The strstr() function conforms to ISO/IEC 9899:1990 (“ISO C90”).