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match-trees: compute buffer offset correctly when splicing 

Currently, the struct object_id pointer returned from tree_entry_extract
lives directly inside the parsed tree buffer. In a future commit, this
will change so that it instead points to a dedicated struct member.
Since in this code path, we want to modify the buffer directly, compute
the buffer offset we want to modify by using the pointer to the path
instead.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2019-01-15 00:39:42 +00:00 committed by Junio C Hamano
parent 0a3faa45b1
commit 36775ab524
1 changed files with 4 additions and 3 deletions
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7
match-trees.c
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@ -199,15 +199,16 @@ static int splice_tree(const struct object_id *oid1, const char *prefix,
while (desc.size) {
const char *name;
unsigned mode;
const struct object_id *oid;
oid = tree_entry_extract(&desc, &name, &mode);
tree_entry_extract(&desc, &name, &mode);
if (strlen(name) == toplen &&
!memcmp(name, prefix, toplen)) {
if (!S_ISDIR(mode))
die("entry %s in tree %s is not a tree", name,
oid_to_hex(oid1));
rewrite_here = (struct object_id *)oid;
rewrite_here = (struct object_id *)(desc.entry.path +
strlen(desc.entry.path) +
1);
break;
}
update_tree_entry(&desc);