On Wed, Feb 15, 2017 at 3:37 PM, Junio C Hamano <gitster@xxxxxxxxx> wrote:
> Stefan Beller <sbeller@xxxxxxxxxx> writes:
>
>> Yes; though I'd place it in strbuf.{c,h} as it is operating
>> on the internals of the strbuf. (Do we make any promises outside of
>> strbuf about the internals? I mean we use .buf all the time, so maybe
>> I am overly cautious here)
>
> I'd rather have it not use struct strbuf as an interface. It only
> needs to pass "char *" and its promise that it touches the string
> in-place without changing the length need to be documented as a
> comment before the function.
>
>>> config.c | 16 +++++++++++++++-
>>> 1 file changed, 15 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/config.c b/config.c
>>> index c6b874a7bf..98bf8fee32 100644
>>> --- a/config.c
>>> +++ b/config.c
>>> @@ -201,6 +201,20 @@ void git_config_push_parameter(const char *text)
>>> strbuf_release(&env);
>>> }
>>>
>>> +static void canonicalize_config_variable_name(struct strbuf *var)
>>> +{
>>> + char *first_dot = strchr(var->buf, '.');
>>> + char *last_dot = strrchr(var->buf, '.');
>>
>> If first_dot != NULL, then last_dot !+ NULL as well.
>> (either both are NULL or none of them),
>> so we can loose one condition below.
>
> I do not think it is worth it, though.
>
>>> + char *cp;
>>> +
>>> + if (first_dot)
>>> + for (cp = var->buf; *cp && cp < first_dot; cp++)
>>> + *cp = tolower(*cp);
>>> + if (last_dot)
>>> + for (cp = last_dot; *cp; cp++)
>>> + *cp = tolower(*cp);
>
> if (first_dot) {
> scan up to first dot
> if (last_dot)
just leave out the 'if (last_dot)' ?
if (first_dot) {
/* also implies last_dot */
do 0 -> first
do last -> end
}