[PATCH] Modify strnstr.c.

[Sichen Zhao]

> On Aug 26 21:28, Sichen Zhao wrote:
>> ---
>>   newlib/libc/string/strnstr.c | 24 ++++++++----------------
>>   1 file changed, 8 insertions(+), 16 deletions(-)
>>
>> diff --git a/newlib/libc/string/strnstr.c b/newlib/libc/string/strnstr.c
>> index da5e5bd..7c87bbd 100644
>> --- a/newlib/libc/string/strnstr.c
>> +++ b/newlib/libc/string/strnstr.c
>> @@ -44,22 +44,14 @@ __FBSDID("$FreeBSD: head/lib/libc/string/strnstr.c 251069 2013-05-28 20:57:40Z e
>>    * first slen characters of s.
>>    */
>>   char *
>> -strnstr(const char *s, const char *find, size_t slen)
>> +strnstr(const char *haystack, const char *needle, size_t haystack_len)
>>   {
>> -	char c, sc;
>> -	size_t len;
>> +  size_t needle_len = strnlen(needle, haystack_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);
>> +  if (needle_len < haystack_len || !needle[needle_len]) {
>> +    char *x = memmem(haystack, haystack_len, needle, needle_len);
>> +    if (x && !memchr(haystack, 0, x - haystack))
>> +      return x;
>> +  }
>> +  return NULL;
>>   }
>> -- 
>> 2.7.4
> Input needed:
>
> Given this is a complete reimplementation not based on FreeBSD code at
> all, and given the code has been contributed by Eric, shouldn't we
> remove the entire copyright header and move this under newlib default
> licensing?
Ohk, i see.
>
> Thanks,
> Corinna
>