Re: [PATCH] general style: replaces memcmp() with proper starts_with()

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David Kastrup <dak@xxxxxxx> writes:

> Junio C Hamano <gitster@xxxxxxxxx> writes:
>
>> Taking two random examples from an early and a late parts of the
>> patch:
>>
>> --- a/builtin/cat-file.c
>> +++ b/builtin/cat-file.c
>> @@ -82,7 +82,7 @@ static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
>>  				enum object_type type;
>>  				unsigned long size;
>>  				char *buffer = read_sha1_file(sha1, &type, &size);
>> -				if (memcmp(buffer, "object ", 7) ||
>> +				if (!starts_with(buffer, "object ") ||
>
> [...]
>
>> The original hunks show that the code knows and relies on magic
>> numbers 7 and 8 very clearly and there are rooms for improvement.
>
> Like: what if the file is empty?

Yes.
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