Re: [PATCH 1/2] xdiff-interface: allow consume function to quit early by returning non-zero

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2011/8/16 Junio C Hamano <gitster@xxxxxxxxx>:
> Nguyễn Thái Ngọc Duy  <pclouds@xxxxxxxxx> writes:
>
>> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
>> ---
>
> What is this for? No explanation?

Um.. for stopping emitting diff when the consumer feels enough and
wants no more. Will update.

>> @@ -64,10 +64,12 @@ static void consume_one(void *priv_, char *s, unsigned long size)
>>               unsigned long this_size;
>>               ep = memchr(s, '\n', size);
>>               this_size = (ep == NULL) ? size : (ep - s + 1);
>> -             priv->consume(priv->consume_callback_data, s, this_size);
>> +             if (priv->consume(priv->consume_callback_data, s, this_size))
>> +                     return -1;
>>               size -= this_size;
>>               s += this_size;
>>       }
>> +     return 0;
>>  }
>
> Returning a negative value implies that this is an error condition. Should
> all "non-zero" returns from ->consume necessarily be considered error?

Perhaps negative values only, like how xdiff treats it.
-- 
Duy
--
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