Re: [PATCH] commit-graph: use commit_list_count()

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On 9/15/2019 1:07 PM, René Scharfe wrote:
> Let commit_list_count() count the number of parents instead of
> duplicating it.  Also store the result in an unsigned int, as that's
> what the function returns, and the count is never negative.

I was unfamiliar with this method, but it obviously removes some
redundant code. We would have many more problems before the signed-ness
of the int was important, but good to use the type matching the
method.

Thanks,
-Stolee

> 
> Signed-off-by: René Scharfe <l.s.r@xxxxxx>
> ---
>  commit-graph.c | 17 ++++++-----------
>  1 file changed, 6 insertions(+), 11 deletions(-)
> 
> diff --git a/commit-graph.c b/commit-graph.c
> index 9b02d2c426..5b0d6b5adc 100644
> --- a/commit-graph.c
> +++ b/commit-graph.c
> @@ -1279,7 +1279,6 @@ static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx)
>  static void copy_oids_to_commits(struct write_commit_graph_context *ctx)
>  {
>  	uint32_t i;
> -	struct commit_list *parent;
> 
>  	ctx->num_extra_edges = 0;
>  	if (ctx->report_progress)
> @@ -1287,7 +1286,8 @@ static void copy_oids_to_commits(struct write_commit_graph_context *ctx)
>  			_("Finding extra edges in commit graph"),
>  			ctx->oids.nr);
>  	for (i = 0; i < ctx->oids.nr; i++) {
> -		int num_parents = 0;
> +		unsigned int num_parents;
> +
>  		display_progress(ctx->progress, i + 1);
>  		if (i > 0 && oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i]))
>  			continue;
> @@ -1301,10 +1301,7 @@ static void copy_oids_to_commits(struct write_commit_graph_context *ctx)
> 
>  		parse_commit_no_graph(ctx->commits.list[ctx->commits.nr]);
> 
> -		for (parent = ctx->commits.list[ctx->commits.nr]->parents;
> -		     parent; parent = parent->next)
> -			num_parents++;
> -
> +		num_parents = commit_list_count(ctx->commits.list[ctx->commits.nr]->parents);
>  		if (num_parents > 2)
>  			ctx->num_extra_edges += num_parents - 1;
> 
> @@ -1616,8 +1613,7 @@ static int commit_compare(const void *_a, const void *_b)
> 
>  static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx)
>  {
> -	uint32_t i, num_parents;
> -	struct commit_list *parent;
> +	uint32_t i;
> 
>  	if (ctx->report_progress)
>  		ctx->progress = start_delayed_progress(
> @@ -1635,10 +1631,9 @@ static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx)
>  			die(_("unexpected duplicate commit id %s"),
>  			    oid_to_hex(&ctx->commits.list[i]->object.oid));
>  		} else {
> -			num_parents = 0;
> -			for (parent = ctx->commits.list[i]->parents; parent; parent = parent->next)
> -				num_parents++;
> +			unsigned int num_parents;
> 
> +			num_parents = commit_list_count(ctx->commits.list[i]->parents);
>  			if (num_parents > 2)
>  				ctx->num_extra_edges += num_parents - 1;
>  		}
> --
> 2.23.0
> 




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