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WCSSTR(3) Library Functions Manual WCSSTR(3)

wcsstr
locate a wide substring in a wide string

#include <wchar.h>
wchar_t *
wcsstr(const wchar_t *big, const wchar_t *little);

The wcsstr() function locates the first occurrence of the wide string little in the wide string big.
If little is an empty wide string, big is returned; if little occurs nowhere in big, NULL is returned; otherwise a pointer to the first wide character of the first occurrence of little is returned.

strstr(3), wcschr(3), wcscspn(3), wcspbrk(3), wcsrchr(3), wcsspn(3), wcstok(3), wmemchr(3)

The wcsstr() function conforms to ISO/IEC 9899:1999 (“ISO C99”) and was first introduced in ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”).

The wcsstr() function was ported from NetBSD and first appeared in OpenBSD 3.8.
June 5, 2013 OpenBSD-current