Re: [PATCH 3/3] ref-filter: factor ref_array pushing into its own function

> On 4/6/2018 2:59 PM, Jeff King wrote:
>>
>> In preparation for callers constructing their own ref_array
>> structs, let's move our own internal push operation into its
>> own function.
>>
>> While we're at it, we can replace REALLOC_ARRAY() with
>> ALLOC_GROW(), which should give the growth operation
>> amortized linear complexity (as opposed to growing by one,
>> which is potentially quadratic, though in-place realloc
>> growth often makes this faster in practice).
>>
>> Signed-off-by: Jeff King <peff@peff.net>
>> ---
>>   ref-filter.c | 16 +++++++++++++---
>>   ref-filter.h |  8 ++++++++
>>   2 files changed, 21 insertions(+), 3 deletions(-)
>>
>> diff --git a/ref-filter.c b/ref-filter.c
>> index c1c3cc9480..6e9328b274 100644
>> --- a/ref-filter.c
>> +++ b/ref-filter.c
>> @@ -1840,6 +1840,18 @@ static struct ref_array_item
>> *new_ref_array_item(const char *refname,
>>         return ref;
>>   }
>>   +struct ref_array_item *ref_array_push(struct ref_array *array,
>> +                                     const char *refname,
>> +                                     const struct object_id *oid)
>> +{
>> +       struct ref_array_item *ref = new_ref_array_item(refname, oid);
>> +
>> +       ALLOC_GROW(array->items, array->nr + 1, array->alloc);
>> +       array->items[array->nr++] = ref;
>> +
>> +       return ref;
>> +}
>> +
>>   static int ref_kind_from_refname(const char *refname)
>>   {
>>         unsigned int i;
>> @@ -1930,13 +1942,11 @@ static int ref_filter_handler(const char *refname,
>> const struct object_id *oid,
>>          * to do its job and the resulting list may yet to be pruned
>>          * by maxcount logic.
>>          */
>> -       ref = new_ref_array_item(refname, oid);
>> +       ref = ref_array_push(ref_cbdata->array, refname, oid);
>>         ref->commit = commit;
>>         ref->flag = flag;
>>         ref->kind = kind;
>>   -     REALLOC_ARRAY(ref_cbdata->array->items, ref_cbdata->array->nr +
>> 1);
>> -       ref_cbdata->array->items[ref_cbdata->array->nr++] = ref;
>>         return 0;
>>   }
>>   diff --git a/ref-filter.h b/ref-filter.h
>> index 68268f9ebc..76cf87cb6c 100644
>> --- a/ref-filter.h
>> +++ b/ref-filter.h
>> @@ -135,4 +135,12 @@ void setup_ref_filter_porcelain_msg(void);
>>   void pretty_print_ref(const char *name, const struct object_id *oid,
>>                       const struct ref_format *format);
>>   +/*
>> + * Push a single ref onto the array; this can be used to construct your
>> own
>> + * ref_array without using filter_refs().
>> + */
>> +struct ref_array_item *ref_array_push(struct ref_array *array,
>> +                                     const char *refname,
>> +                                     const struct object_id *oid);
>> +
>>   #endif /*  REF_FILTER_H  */
>
>
> The three patches in this series look good to me.
>
> Reviewed-by: Derrick Stolee <dstolee@microsoft.com>