Re: [PATCH v2 1/3] add strnncmp() function

> Add a strnncmp() function which behaves like strncmp() except it takes
> the length of both strings instead of just one.  It behaves the same as
> strncmp() up to the minimum common length between the strings.  When the
> strings are identical up to this minimum common length, the length
> difference is returned.
>
> Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
> ---
>  strbuf.c | 9 +++++++++
>  strbuf.h | 2 ++
>  2 files changed, 11 insertions(+)
>
> diff --git a/strbuf.c b/strbuf.c
> index ac62982..4eb7954 100644
> --- a/strbuf.c
> +++ b/strbuf.c
> @@ -600,3 +600,12 @@ char *xstrdup_tolower(const char *string)
>         result[i] = '\0';
>         return result;
>  }
> +
> +int strnncmp(const char *a, int len_a, const char *b, int len_b)
> +{
> +       int min_len = (len_a < len_b) ? len_a : len_b;
> +       int cmp = strncmp(a, b, min_len);
> +       if (cmp)
> +               return cmp;
> +       return (len_a - len_b);
> +}