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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-03 19:43:54 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-04 00:58:53 +0100
commit44c81eeffe9c8820b1009a7a5c728782aa5ebf40 (patch)
tree544eceb6dc5633018e5147c88ca9b07dd0fb54d9 /lib/sqfs/meta_reader.c
parent6f47796dc0761fac359ec59ce26c7af5154e538d (diff)
Add a generic copying mechanism to sqfs_object_t
This patch adds a deep-copy callback to sqfs_object_t and removes the copying mechanism from sqfs_compressor_t. This is also interesting for other types. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/meta_reader.c')
-rw-r--r--lib/sqfs/meta_reader.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/sqfs/meta_reader.c b/lib/sqfs/meta_reader.c
index 8fd7f21..b16b115 100644
--- a/lib/sqfs/meta_reader.c
+++ b/lib/sqfs/meta_reader.c
@@ -51,6 +51,20 @@ static void meta_reader_destroy(sqfs_object_t *m)
free(m);
}
+static sqfs_object_t *meta_reader_copy(const sqfs_object_t *obj)
+{
+ const sqfs_meta_reader_t *m = (const sqfs_meta_reader_t *)obj;
+ sqfs_meta_reader_t *copy = malloc(sizeof(*copy));
+
+ if (copy != NULL) {
+ memcpy(copy, m, sizeof(*m));
+ }
+
+ /* XXX: cmp and file aren't deep-copied because m
+ doesn't own them either. */
+ return (sqfs_object_t *)copy;
+}
+
sqfs_meta_reader_t *sqfs_meta_reader_create(sqfs_file_t *file,
sqfs_compressor_t *cmp,
sqfs_u64 start, sqfs_u64 limit)
@@ -60,6 +74,7 @@ sqfs_meta_reader_t *sqfs_meta_reader_create(sqfs_file_t *file,
if (m == NULL)
return NULL;
+ ((sqfs_object_t *)m)->copy = meta_reader_copy;
((sqfs_object_t *)m)->destroy = meta_reader_destroy;
m->start = start;
m->limit = limit;