commit-graph: place bloom_settings in context

derrickstolee · gitster · commit 98037f2bf2fb · 2020-06-23T17:12:08.000-07:00
Place an instance of struct bloom_settings into the struct
write_commit_graph_context. This allows simplifying the function
prototype of write_graph_chunk_bloom_data(). This will allow us
to combine the function prototypes and use function pointers to
simplify write_commit_graph_file().

By using a pointer, we can later replace the settings to match those
that exist in the current commit-graph, in case a future Git version
allows customization of these parameters.

Reported-by: SZEDER Gábor &lt;szeder.dev@gmail.com&gt;
Signed-off-by: Derrick Stolee &lt;dstolee@microsoft.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/commit-graph.c b/commit-graph.c
@@ -882,6 +882,7 @@ struct write_commit_graph_context {
 
 	const struct split_commit_graph_opts *split_opts;
 	size_t total_bloom_filter_data_size;
+	const struct bloom_filter_settings *bloom_settings;
 };
 
 static void write_graph_chunk_fanout(struct hashfile *f,
@@ -1103,8 +1104,7 @@ static void write_graph_chunk_bloom_indexes(struct hashfile *f,
 }
 
 static void write_graph_chunk_bloom_data(struct hashfile *f,
-					 struct write_commit_graph_context *ctx,
-					 const struct bloom_filter_settings *settings)
+					 struct write_commit_graph_context *ctx)
 {
 	struct commit **list = ctx->commits.list;
 	struct commit **last = ctx->commits.list + ctx->commits.nr;
@@ -1116,9 +1116,9 @@ static void write_graph_chunk_bloom_data(struct hashfile *f,
 			_("Writing changed paths Bloom filters data"),
 			ctx->commits.nr);
 
-	hashwrite_be32(f, settings->hash_version);
-	hashwrite_be32(f, settings->num_hashes);
-	hashwrite_be32(f, settings->bits_per_entry);
+	hashwrite_be32(f, ctx->bloom_settings->hash_version);
+	hashwrite_be32(f, ctx->bloom_settings->num_hashes);
+	hashwrite_be32(f, ctx->bloom_settings->bits_per_entry);
 
 	while (list < last) {
 		struct bloom_filter *filter = get_bloom_filter(ctx->r, *list, 0);
@@ -1541,6 +1541,8 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 	struct object_id file_hash;
 	const struct bloom_filter_settings bloom_settings = DEFAULT_BLOOM_FILTER_SETTINGS;
 
+	ctx->bloom_settings = &bloom_settings;
+
 	if (ctx->split) {
 		struct strbuf tmp_file = STRBUF_INIT;
 
@@ -1642,7 +1644,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 		write_graph_chunk_extra_edges(f, ctx);
 	if (ctx->changed_paths) {
 		write_graph_chunk_bloom_indexes(f, ctx);
-		write_graph_chunk_bloom_data(f, ctx, &bloom_settings);
+		write_graph_chunk_bloom_data(f, ctx);
 	}
 	if (ctx->num_commit_graphs_after > 1 &&
 	    write_graph_chunk_base(f, ctx)) {
