Mercurial > gnulib
view lib/wcsstr-impl.h @ 40227:5207eb0dcd2a
tests: Avoid havoc with "gcc -fcheck-pointer-bounds".
* tests/test-fprintf-posix2.c: Skip the test when -fcheck-pointer-bounds
is in use.
* tests/test-printf-posix2.c: Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 10 Mar 2019 17:09:30 +0100 |
parents | b06060465f09 |
children |
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/* Locate a substring in a wide string. Copyright (C) 1999, 2011-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 1999. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ wchar_t * wcsstr (const wchar_t *haystack, const wchar_t *needle) { wchar_t n = needle[0]; /* Is needle empty? */ if (n == (wchar_t)'\0') return (wchar_t *) haystack; /* Is needle nearly empty? */ if (needle[1] == (wchar_t)'\0') return wcschr (haystack, n); /* Search for needle's first character. */ for (; *haystack != (wchar_t)'\0'; haystack++) { if (*haystack == n) { /* Compare with needle's remaining characters. */ const wchar_t *hptr = haystack + 1; const wchar_t *nptr = needle + 1; for (;;) { if (*hptr != *nptr) break; hptr++; nptr++; if (*nptr == (wchar_t)'\0') return (wchar_t *) haystack; } } } return NULL; }