wcsstr(3) — Linux manual page

wcsstr(3)                Library Functions Manual               wcsstr(3)

NAME         top

       wcsstr - locate a substring in a wide-character string

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <wchar.h>

       wchar_t *wcsstr(const wchar_t *haystack, const wchar_t *needle);

DESCRIPTION         top

       The wcsstr() function is the wide-character equivalent of the
       strstr(3) function.  It searches for the first occurrence of the
       wide-character string needle (without its terminating null wide
       character (L'\0')) as a substring in the wide-character string
       haystack.

RETURN VALUE         top

       The wcsstr() function returns a pointer to the first occurrence of
       needle in haystack.  It returns NULL if needle does not occur as a
       substring in haystack.

       Note the special case: If needle is the empty wide-character
       string, the return value is always haystack itself.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                            │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │ wcsstr()                             │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, C99.

SEE ALSO         top

       strstr(3), wcschr(3)

COLOPHON         top

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Linux man-pages 6.15            2025-05-17                      wcsstr(3)

Pages that refer to this page: strstr(3),  wcschr(3),  signal-safety(7)

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