[PATCH] commit-graph: fix some "plain integer as NULL pointer" warnings

[PATCH] commit-graph: fix some "plain integer as NULL pointer" warnings

[Ramsay Jones]

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
---

Hi Derrick,

If you need to re-roll your 'ds/commit-graph' branch, could you
please squash this into the relevant patches (corresponding to
commits 0fd2d95ee6 ["commit-graph: implement --set-latest"],
a33b9b79ff ["commit-graph: implement --delete-expired"] and finally
commit b534f9e961 ["commit-graph: implement git commit-graph read"]).

Also, I note that two symbols are only used in commit-graph.c but
are declared extern. Namely 'commit_graph' (declared line #42) and
'prepare_commit_graph' (declared line #212). Do these symbols need
to be extern (in future patches, perhaps)?

Thanks!

ATB,
Ramsay Jones

 builtin/commit-graph.c | 2 +-
 commit-graph.c         | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index be1883f1b..efdb003ca 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -33,7 +33,7 @@ static struct opts_commit_graph {
 
 static int graph_read(int argc, const char **argv)
 {
-	struct commit_graph *graph = 0;
+	struct commit_graph *graph = NULL;
 	struct strbuf full_path = STRBUF_INIT;
 
 	static struct option builtin_commit_graph_read_options[] = {
diff --git a/commit-graph.c b/commit-graph.c
index fc5ee7e99..c2f443436 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -45,7 +45,7 @@ char *get_graph_latest_filename(const char *obj_dir)
 {
 	struct strbuf fname = STRBUF_INIT;
 	strbuf_addf(&fname, "%s/info/graph-latest", obj_dir);
-	return strbuf_detach(&fname, 0);
+	return strbuf_detach(&fname, NULL);
 }
 
 char *get_graph_latest_contents(const char *obj_dir)
@@ -60,7 +60,7 @@ char *get_graph_latest_contents(const char *obj_dir)
 	FREE_AND_NULL(fname);
 
 	if (!f)
-		return 0;
+		return NULL;
 
 	while (!feof(f)) {
 		if (fgets(buf, sizeof(buf), f))
@@ -95,10 +95,10 @@ struct commit_graph *load_commit_graph_one(const char *graph_file)
 	unsigned char graph_version, hash_version;
 
 	if (fd < 0)
-		return 0;
+		return NULL;
 	if (fstat(fd, &st)) {
 		close(fd);
-		return 0;
+		return NULL;
 	}
 	graph_size = xsize_t(st.st_size);
 
-- 
2.16.0

Re: [PATCH] commit-graph: fix some "plain integer as NULL pointer" warnings

[René Scharfe]

Am 24.02.2018 um 03:24 schrieb Ramsay Jones:
> diff --git a/commit-graph.c b/commit-graph.c
> index fc5ee7e99..c2f443436 100644
> --- a/commit-graph.c
> +++ b/commit-graph.c
> @@ -45,7 +45,7 @@ char *get_graph_latest_filename(const char *obj_dir)
>   {
>   	struct strbuf fname = STRBUF_INIT;
>   	strbuf_addf(&fname, "%s/info/graph-latest", obj_dir);
> -	return strbuf_detach(&fname, 0);
> +	return strbuf_detach(&fname, NULL);
>   }

You could also replace that function body with:

	return xstrfmt("%s/info/graph-latest", obj_dir);

René

Re: [PATCH] commit-graph: fix some "plain integer as NULL pointer" warnings

[Derrick Stolee]

On 2/24/2018 12:42 AM, René Scharfe wrote:
> Am 24.02.2018 um 03:24 schrieb Ramsay Jones:
>> diff --git a/commit-graph.c b/commit-graph.c
>> index fc5ee7e99..c2f443436 100644
>> --- a/commit-graph.c
>> +++ b/commit-graph.c
>> @@ -45,7 +45,7 @@ char *get_graph_latest_filename(const char *obj_dir)
>>    {
>>    	struct strbuf fname = STRBUF_INIT;
>>    	strbuf_addf(&fname, "%s/info/graph-latest", obj_dir);
>> -	return strbuf_detach(&fname, 0);
>> +	return strbuf_detach(&fname, NULL);
>>    }
> You could also replace that function body with:
>
> 	return xstrfmt("%s/info/graph-latest", obj_dir);
>
> René

Thanks for the feedback! I will apply these locally as I am re-rolling 
today.

-Stolee