[PATCH 3/7] Import strnstr.c from FreeBSD.

[Aditya Upadhyay]

Yes.. Definitely i will do. Sichen can directly send the patch for strnstr
to newlib ml.

Thanks,
Aditya Upadhyay

On 17 Aug 2017 7:03 p.m., "Joel Sherrill" <joel at rtems.org> wrote:

>
>
> On Aug 17, 2017 8:19 AM, "Gedare Bloom" <gedare at rtems.org> wrote:
>
> On Wed, Aug 16, 2017 at 8:14 PM, Sichen Zhao <1473996754 at qq.com> wrote:
> > ---
> >  freebsd/lib/libc/string/strnstr.c | 67 ++++++++++++++++++++++++++++++
> +++++++++
> >  1 file changed, 67 insertions(+)
> >  create mode 100644 freebsd/lib/libc/string/strnstr.c
> >
> > diff --git a/freebsd/lib/libc/string/strnstr.c
> b/freebsd/lib/libc/string/strnstr.c
> > new file mode 100644
> > index 0000000..247a2b5
> > --- /dev/null
> > +++ b/freebsd/lib/libc/string/strnstr.c
> > @@ -0,0 +1,67 @@
> > +#include <machine/rtems-bsd-user-space.h>
> > +
> > +/*-
> > + * Copyright (c) 2001 Mike Barcroft <mike at FreeBSD.org>
> > + * Copyright (c) 1990, 1993
> > + *     The Regents of the University of California.  All rights
> reserved.
> > + *
> > + * This code is derived from software contributed to Berkeley by
> > + * Chris Torek.
> > + *
> > + * Redistribution and use in source and binary forms, with or without
> > + * modification, are permitted provided that the following conditions
> > + * are met:
> > + * 1. Redistributions of source code must retain the above copyright
> > + *    notice, this list of conditions and the following disclaimer.
> > + * 2. Redistributions in binary form must reproduce the above copyright
> > + *    notice, this list of conditions and the following disclaimer in
> the
> > + *    documentation and/or other materials provided with the
> distribution.
> > + * 3. Neither the name of the University nor the names of its
> contributors
> > + *    may be used to endorse or promote products derived from this
> software
> > + *    without specific prior written permission.
> > + *
> > + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
> AND
> > + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
> PURPOSE
> > + * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
> LIABLE
> > + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> CONSEQUENTIAL
> > + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
> GOODS
> > + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> > + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> STRICT
> > + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
> ANY WAY
> > + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
> OF
> > + * SUCH DAMAGE.
> > + */
> > +
> > +#if defined(LIBC_SCCS) && !defined(lint)
> > +static char sccsid[] = "@(#)strstr.c   8.1 (Berkeley) 6/4/93";
> > +#endif /* LIBC_SCCS and not lint */
> > +#include <sys/cdefs.h>
> > +__FBSDID("$FreeBSD$");
> > +
> > +#include <string.h>
> > +
> > +/*
> > + * Find the first occurrence of find in s, where the search is limited
> to the
> > + * first slen characters of s.
> > + */
> > +char *
> > +strnstr(const char *s, const char *find, size_t slen)
> > +{
> > +       char c, sc;
> > +       size_t len;
> > +
> > +       if ((c = *find++) != '\0') {
> > +               len = strlen(find);
> > +               do {
> > +                       do {
> > +                               if (slen-- < 1 || (sc = *s++) == '\0')
> > +                                       return (NULL);
> > +                       } while (sc != c);
> > +                       if (len > slen)
> > +                               return (NULL);
> > +               } while (strncmp(s, find, len) != 0);
> > +               s--;
> > +       }
> > +       return ((char *)s);
> > +}
>
> This can definitely be added in newlib. Aditya may be able to assist
> in the process?
>
>
> Agreed. This should be as widely available to RTEMS applications as
> possible.
>
>
>
> > --
> > 2.7.4
> >
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