wcsstr(3)

wcsstr3

Locate a substring in a wide-character string

Usage

#include <wchar.h>

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

Library

Standard C library (libc, -lc)

Overview

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

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

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
wcsstr()Thread safetyMT-Safe

Releases

14 releases since Debian 2.2 (Potato); the text changed 13 times.

  1. 2.2
  2. 3.0
  3. 3.1
  4. 4.0
  5. 5.0
  6. 6.0
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. Arch

Standards

C11, POSIX.1-2008.

History

POSIX.1-2001, C99.

From man-pages 6.19-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.