Convert GIT_SHA1_HEXSZ used for allocation to GIT_MAX_HEXSZ

Since we will likely be introducing a new hash function at some point,
and that hash function might be longer than 40 hex characters, use the
constant GIT_MAX_HEXSZ, which is designed to be suitable for
allocations, instead of GIT_SHA1_HEXSZ.  This will ease the transition
down the line by distinguishing between places where we need to allocate
memory suitable for the largest hash from those where we need to handle
the current hash.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

10 files changed, 14 insertions, 14 deletions

diff --git a/bisect.c b/bisect.c
index 30808cadf..21c3e3463 100644
--- a/bisect.c
+++ b/bisect.c
@@ -682,7 +682,7 @@ static int is_expected_rev(const struct object_id *oid)
 
 static int bisect_checkout(const unsigned char *bisect_rev, int no_checkout)
 {
-	char bisect_rev_hex[GIT_SHA1_HEXSZ + 1];
+	char bisect_rev_hex[GIT_MAX_HEXSZ + 1];
 
 	memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), GIT_SHA1_HEXSZ + 1);
 	update_ref(NULL, "BISECT_EXPECTED_REV", bisect_rev, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
diff --git a/builtin/blame.c b/builtin/blame.c
index f7aa95f4b..07506a3e4 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -1890,7 +1890,7 @@ static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent,
 	int cnt;
 	const char *cp;
 	struct origin *suspect = ent->suspect;
-	char hex[GIT_SHA1_HEXSZ + 1];
+	char hex[GIT_MAX_HEXSZ + 1];
 
 	oid_to_hex_r(hex, &suspect->commit->object.oid);
 	printf("%s %d %d %d\n",
@@ -1928,7 +1928,7 @@ static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
 	const char *cp;
 	struct origin *suspect = ent->suspect;
 	struct commit_info ci;
-	char hex[GIT_SHA1_HEXSZ + 1];
+	char hex[GIT_MAX_HEXSZ + 1];
 	int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP);
 
 	get_commit_info(suspect->commit, &ci, 1);
diff --git a/builtin/merge-index.c b/builtin/merge-index.c
index 2d1b6db6b..c99443b09 100644
--- a/builtin/merge-index.c
+++ b/builtin/merge-index.c
@@ -9,7 +9,7 @@ static int merge_entry(int pos, const char *path)
 {
 	int found;
 	const char *arguments[] = { pgm, "", "", "", path, "", "", "", NULL };
-	char hexbuf[4][GIT_SHA1_HEXSZ + 1];
+	char hexbuf[4][GIT_MAX_HEXSZ + 1];
 	char ownbuf[4][60];
 
 	if (pos >= active_nr)
diff --git a/builtin/merge.c b/builtin/merge.c
index 7554b8d41..a2cceea3f 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1296,7 +1296,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 	if (verify_signatures) {
 		for (p = remoteheads; p; p = p->next) {
 			struct commit *commit = p->item;
-			char hex[GIT_SHA1_HEXSZ + 1];
+			char hex[GIT_MAX_HEXSZ + 1];
 			struct signature_check signature_check;
 			memset(&signature_check, 0, sizeof(signature_check));
 
diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index 0aa93d589..bcf77f0b8 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -212,7 +212,7 @@ static void print_var_int(const char *var, int val)
 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 {
 	int cnt, flags = info->flags;
-	char hex[GIT_SHA1_HEXSZ + 1] = "";
+	char hex[GIT_MAX_HEXSZ + 1] = "";
 	struct commit_list *tried;
 	struct rev_info *revs = info->revs;
 
diff --git a/diff.c b/diff.c
index a628ac3a9..330b640c6 100644
--- a/diff.c
+++ b/diff.c
@@ -398,7 +398,7 @@ static struct diff_tempfile {
 	 */
 	const char *name;
 
-	char hex[GIT_SHA1_HEXSZ + 1];
+	char hex[GIT_MAX_HEXSZ + 1];
 	char mode[10];
 
 	/*
@@ -4219,7 +4219,7 @@ const char *diff_aligned_abbrev(const struct object_id *oid, int len)
 	 * uniqueness across all objects (statistically speaking).
 	 */
 	if (abblen < GIT_SHA1_HEXSZ - 3) {
-		static char hex[GIT_SHA1_HEXSZ + 1];
+		static char hex[GIT_MAX_HEXSZ + 1];
 		if (len < abblen && abblen <= len + 2)
 			xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, "..");
 		else
diff --git a/hex.c b/hex.c
index eab7b626e..28b44118c 100644
--- a/hex.c
+++ b/hex.c
@@ -85,7 +85,7 @@ char *oid_to_hex_r(char *buffer, const struct object_id *oid)
 char *sha1_to_hex(const unsigned char *sha1)
 {
 	static int bufno;
-	static char hexbuffer[4][GIT_SHA1_HEXSZ + 1];
+	static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
 	bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
 	return sha1_to_hex_r(hexbuffer[bufno], sha1);
 }
diff --git a/sha1_file.c b/sha1_file.c
index 71063890f..e763000d3 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -3759,7 +3759,7 @@ static int for_each_file_in_obj_subdir(int subdir_nr,
 		strbuf_addf(path, "/%s", de->d_name);
 
 		if (strlen(de->d_name) == GIT_SHA1_HEXSZ - 2)  {
-			char hex[GIT_SHA1_HEXSZ+1];
+			char hex[GIT_MAX_HEXSZ+1];
 			struct object_id oid;
 
 			snprintf(hex, sizeof(hex), "%02x%s",
diff --git a/sha1_name.c b/sha1_name.c
index cda9e49b1..964201bc2 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -15,7 +15,7 @@ typedef int (*disambiguate_hint_fn)(const unsigned char *, void *);
 
 struct disambiguate_state {
 	int len; /* length of prefix in hex chars */
-	char hex_pfx[GIT_SHA1_HEXSZ + 1];
+	char hex_pfx[GIT_MAX_HEXSZ + 1];
 	unsigned char bin_pfx[GIT_SHA1_RAWSZ];
 
 	disambiguate_hint_fn fn;
@@ -80,7 +80,7 @@ static void update_candidates(struct disambiguate_state *ds, const unsigned char
 static void find_short_object_filename(struct disambiguate_state *ds)
 {
 	struct alternate_object_database *alt;
-	char hex[GIT_SHA1_HEXSZ];
+	char hex[GIT_MAX_HEXSZ];
 	static struct alternate_object_database *fakeent;
 
 	if (!fakeent) {
@@ -509,7 +509,7 @@ int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len)
 const char *find_unique_abbrev(const unsigned char *sha1, int len)
 {
 	static int bufno;
-	static char hexbuffer[4][GIT_SHA1_HEXSZ + 1];
+	static char hexbuffer[4][GIT_MAX_HEXSZ + 1];
 	char *hex = hexbuffer[bufno];
 	bufno = (bufno + 1) % ARRAY_SIZE(hexbuffer);
 	find_unique_abbrev_r(hex, sha1, len);
diff --git a/transport.c b/transport.c
index 417ed7f19..8a90b0c29 100644
--- a/transport.c
+++ b/transport.c
@@ -447,7 +447,7 @@ static int print_one_push_status(struct ref *ref, const char *dest, int count,
 
 static int measure_abbrev(const struct object_id *oid, int sofar)
 {
-	char hex[GIT_SHA1_HEXSZ + 1];
+	char hex[GIT_MAX_HEXSZ + 1];
 	int w = find_unique_abbrev_r(hex, oid->hash, DEFAULT_ABBREV);
 
 	return (w < sofar) ? sofar : w;