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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/id_table.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/id_table.c')
-rw-r--r--lib/sqfs/id_table.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/sqfs/id_table.c b/lib/sqfs/id_table.c
index 86f2809..e3d386e 100644
--- a/lib/sqfs/id_table.c
+++ b/lib/sqfs/id_table.c
@@ -32,6 +32,30 @@ static void id_table_destroy(sqfs_object_t *obj)
free(tbl);
}
+static sqfs_object_t *id_table_copy(const sqfs_object_t *obj)
+{
+ const sqfs_id_table_t *tbl = (const sqfs_id_table_t *)obj;
+ sqfs_id_table_t *copy;
+
+ copy = malloc(sizeof(*copy));
+ if (copy == NULL)
+ return NULL;
+
+ memcpy(copy, tbl, sizeof(*tbl));
+
+ copy->num_ids = tbl->num_ids;
+ copy->max_ids = tbl->num_ids;
+ copy->ids = malloc(tbl->num_ids * sizeof(tbl->ids[0]));
+
+ if (copy->ids == NULL) {
+ free(copy);
+ return NULL;
+ }
+
+ memcpy(copy->ids, tbl->ids, tbl->num_ids * sizeof(tbl->ids[0]));
+ return (sqfs_object_t *)copy;
+}
+
sqfs_id_table_t *sqfs_id_table_create(sqfs_u32 flags)
{
sqfs_id_table_t *tbl;
@@ -43,6 +67,7 @@ sqfs_id_table_t *sqfs_id_table_create(sqfs_u32 flags)
if (tbl != NULL) {
((sqfs_object_t *)tbl)->destroy = id_table_destroy;
+ ((sqfs_object_t *)tbl)->copy = id_table_copy;
}
return tbl;