Convert most leaf functions to struct object_id. Change several
hardcoded numbers to uses of parse_oid_hex. In doing so, verify that we
when we want two trees, we have exactly two trees.
Finally, in stdin_diff_commit, avoid accessing the byte after the NUL.
This will be a NUL as well, since the first NUL was a newline we
overwrote. However, with parse_oid_hex, we no longer need to increment
the pointer directly, and can simply increment it as part of our check
for the space character.
Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
builtin/diff-tree.c | 43 +++++++++++++++++++++----------------------
1 file changed, 21 insertions(+), 22 deletions(-)
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index 8ce00480cd..1656e092bd 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -7,46 +7,44 @@
static struct rev_info log_tree_opt;
-static int diff_tree_commit_sha1(const unsigned char *sha1)
+static int diff_tree_commit_sha1(const struct object_id *oid)
{
- struct commit *commit = lookup_commit_reference(sha1);
+ struct commit *commit = lookup_commit_reference(oid->hash);
if (!commit)
return -1;
return log_tree_commit(&log_tree_opt, commit);
}
/* Diff one or more commits. */
-static int stdin_diff_commit(struct commit *commit, char *line, int len)
+static int stdin_diff_commit(struct commit *commit, const char *p)
{
- unsigned char sha1[20];
- if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
+ struct object_id oid;
+ if (isspace(*p++) && !parse_oid_hex(p, &oid, &p)) {
/* Graft the fake parents locally to the commit */
- int pos = 41;
struct commit_list **pptr;
/* Free the real parent list */
free_commit_list(commit->parents);
commit->parents = NULL;
pptr = &(commit->parents);
- while (line[pos] && !get_sha1_hex(line + pos, sha1)) {
- struct commit *parent = lookup_commit(sha1);
+ while (isspace(*p++) && !parse_oid_hex(p, &oid, &p)) {
+ struct commit *parent = lookup_commit(oid.hash);
if (parent) {
pptr = &commit_list_insert(parent, pptr)->next;
}
- pos += 41;
}
}
return log_tree_commit(&log_tree_opt, commit);
}
/* Diff two trees. */
-static int stdin_diff_trees(struct tree *tree1, char *line, int len)
+static int stdin_diff_trees(struct tree *tree1, const char *p)
{
- unsigned char sha1[20];
+ struct object_id oid;
struct tree *tree2;
- if (len != 82 || !isspace(line[40]) || get_sha1_hex(line + 41, sha1))
+ if (!isspace(*p++) || parse_oid_hex(p, &oid, &p) || *p)
return error("Need exactly two trees, separated by a space");
- tree2 = lookup_tree(sha1);
+ tree2 = lookup_tree(oid.hash);
if (!tree2 || parse_tree(tree2))
return -1;
printf("%s %s\n", oid_to_hex(&tree1->object.oid),
@@ -60,23 +58,24 @@ static int stdin_diff_trees(struct tree *tree1, char *line, int len)
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
- unsigned char sha1[20];
+ struct object_id oid;
struct object *obj;
+ const char *p;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
- if (get_sha1_hex(line, sha1))
+ if (parse_oid_hex(line, &oid, &p))
return -1;
- obj = parse_object(sha1);
+ obj = parse_object(oid.hash);
if (!obj)
return -1;
if (obj->type == OBJ_COMMIT)
- return stdin_diff_commit((struct commit *)obj, line, len);
+ return stdin_diff_commit((struct commit *)obj, p);
if (obj->type == OBJ_TREE)
- return stdin_diff_trees((struct tree *)obj, line, len);
+ return stdin_diff_trees((struct tree *)obj, p);
error("Object %s is a %s, not a commit or tree",
- sha1_to_hex(sha1), typename(obj->type));
+ oid_to_hex(&oid), typename(obj->type));
return -1;
}
@@ -141,7 +140,7 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
break;
case 1:
tree1 = opt->pending.objects[0].item;
- diff_tree_commit_sha1(tree1->oid.hash);
+ diff_tree_commit_sha1(&tree1->oid);
break;
case 2:
tree1 = opt->pending.objects[0].item;
@@ -164,9 +163,9 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
while (fgets(line, sizeof(line), stdin)) {
- unsigned char sha1[20];
+ struct object_id oid;
- if (get_sha1_hex(line, sha1)) {
+ if (get_oid_hex(line, &oid)) {
fputs(line, stdout);
fflush(stdout);
}
--
2.11.0