From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 14 Jan 2021 06:42:45 GMT
Subject: Re: [PATCH v2 18/20] pack-revindex: remove unused 'find_revindex_position()'
Message-ID: <xmqqft34yq6y.fsf@gitster.c.googlers.com>
In-Reply-To: <3b5c92be684b95f04cbe224c791d87657be9ff79.1610576604.git.me@ttaylorr.com>

Taylor Blau <me@ttaylorr.com> writes:

> -int find_revindex_position(struct packed_git *p, off_t ofs)
> +int offset_to_pack_pos(struct packed_git *p, off_t ofs, uint32_t *pos)
>  {
> -	int lo = 0;
> -	int hi = p->num_objects + 1;
> -	const struct revindex_entry *revindex = p->revindex;
> +	unsigned lo, hi;
> +	const struct revindex_entry *revindex;
> +
> +	if (load_pack_revindex(p) < 0)
> +		return -1;
> +
> +	lo = 0;
> +	hi = p->num_objects + 1;
> +	revindex = p->revindex;
>  	do {
>  		const unsigned mi = lo + (hi - lo) / 2;
>  		if (revindex[mi].offset == ofs) {
> -			return mi;
> +			*pos = mi;
> +			return 0;
>  		} else if (ofs < revindex[mi].offset)
>  			hi = mi;
>  		else

OK, we can safely depend on "unsigned int" at least as wide as
"uint32_t"; unlike the original that used "int", we won't risk
losing the upper half of 4G range.

Nice.