correct type of EMPTY_TREE_SHA1_BIN

Functions such as hashcmp that expect a binary SHA-1 value take
parameters of type "unsigned char *" to avoid accepting a textual
SHA-1 passed by mistake.  Unfortunately, this means passing the string
literal EMPTY_TREE_SHA1_BIN requires an ugly cast.  Tweak the
definition of EMPTY_TREE_SHA1_BIN to produce a value of more
convenient type.

In the future the definition might change to

	extern const unsigned char empty_tree_sha1_bin[20];
	#define EMPTY_TREE_SHA1_BIN empty_tree_sha1_bin

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 757f9a08ddbaf102726a781b06d7294a4638984e..cd7f56e6c4b6e1b1059ffa0eae91b46e579b9e97 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -404,7 +404,7 @@ static int merge_working_tree(struct checkout_opts *opts,
                topts.dir->exclude_per_dir = ".gitignore";
                tree = parse_tree_indirect(old->commit ?
                                           old->commit->object.sha1 :
-                                          (unsigned char *)EMPTY_TREE_SHA1_BIN);
+                                          EMPTY_TREE_SHA1_BIN);
                init_tree_desc(&trees[0], tree->buffer, tree->size);
                tree = parse_tree_indirect(new->commit->object.sha1);
                init_tree_desc(&trees[1], tree->buffer, tree->size);

diff --git a/cache.h b/cache.h
index d83d68c859904fadbe2501cabd8575be09131d7b..3abf8950bdd9f950b65ee4544e0cfe6517f1912a 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -676,9 +676,11 @@ static inline void hashclr(unsigned char *hash)
 
 #define EMPTY_TREE_SHA1_HEX \
        "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
-#define EMPTY_TREE_SHA1_BIN \
+#define EMPTY_TREE_SHA1_BIN_LITERAL \
         "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
         "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
+#define EMPTY_TREE_SHA1_BIN \
+        ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
 
 int git_mkstemp(char *path, size_t n, const char *template);
 

diff --git a/notes-merge.c b/notes-merge.c
index 71c4d45fcd1ac49630bdb8bc7b0aec658011c21b..1467ad31795ae21896f1e608e7cb032df2bc94a8 100644 (file)
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -615,7 +615,7 @@ int notes_merge(struct notes_merge_options *o,
        bases = get_merge_bases(local, remote, 1);
        if (!bases) {
                base_sha1 = null_sha1;
-               base_tree_sha1 = (unsigned char *)EMPTY_TREE_SHA1_BIN;
+               base_tree_sha1 = EMPTY_TREE_SHA1_BIN;
                OUTPUT(o, 4, "No merge base found; doing history-less merge");
        } else if (!bases->next) {
                base_sha1 = bases->item->object.sha1;

diff --git a/sha1_file.c b/sha1_file.c
index 0b830c8642fa2b141c9888c68713a29fc4df2ef2..27730c334cb433ef749a0efc5353a7f38032559c 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -52,7 +52,7 @@ static struct cached_object {
 static int cached_object_nr, cached_object_alloc;
 
 static struct cached_object empty_tree = {
-       EMPTY_TREE_SHA1_BIN,
+       EMPTY_TREE_SHA1_BIN_LITERAL,
        OBJ_TREE,
        "",
        0