strcasestr_l3
Locate a substring in a string
Part of strstr(3).
Usage
#include <string.h>
QChar *
strstr(QChar *big, const char *little);
QChar *
strcasestr(QChar *big, const char *little);
QChar *
strnstr(QChar *big, const char *little, size_t len);
#include <string.h>
#include <xlocale.h>
QChar *
strcasestr_l(QChar *big, const char *little, locale_t loc);
Library
Standard C Library (libc, -lc)
Overview
The strstr() function locates the first occurrence of the null-terminated string little in the null-terminated string big.
The strcasestr() function is similar to strstr(), but ignores the case of both strings.
The strcasestr_l() function does the same as strcasestr() but takes an explicit locale rather than using the current locale.
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.
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);
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);
Releases
33 releases since FreeBSD 9.1-RELEASE; the text changed 22 times.