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Diffstat (limited to 'lib/sqfs/xattr/xattr_writer.c')
-rw-r--r--lib/sqfs/xattr/xattr_writer.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/lib/sqfs/xattr/xattr_writer.c b/lib/sqfs/xattr/xattr_writer.c
new file mode 100644
index 0000000..9de3823
--- /dev/null
+++ b/lib/sqfs/xattr/xattr_writer.c
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: LGPL-3.0-or-later */
+/*
+ * xattr_writer.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "xattr_writer.h"
+
+static sqfs_object_t *xattr_writer_copy(const sqfs_object_t *obj)
+{
+ const sqfs_xattr_writer_t *xwr = (const sqfs_xattr_writer_t *)obj;
+ kv_block_desc_t *blk, *it, **next;
+ sqfs_xattr_writer_t *copy;
+
+ copy = calloc(1, sizeof(*copy));
+ if (copy == NULL)
+ return NULL;
+
+ memcpy(copy, xwr, sizeof(*xwr));
+
+ if (str_table_copy(&copy->keys, &xwr->keys))
+ goto fail_keys;
+
+ if (str_table_copy(&copy->values, &xwr->values))
+ goto fail_values;
+
+ copy->max_pairs = xwr->num_pairs;
+ copy->num_pairs = xwr->num_pairs;
+
+ copy->kv_pairs = malloc(sizeof(copy->kv_pairs[0]) * xwr->num_pairs);
+ if (copy->kv_pairs == NULL)
+ goto fail_pairs;
+
+ memcpy(copy->kv_pairs, xwr->kv_pairs,
+ sizeof(copy->kv_pairs[0]) * xwr->num_pairs);
+
+ next = &(copy->kv_blocks);
+
+ for (it = xwr->kv_blocks; it != NULL; it = it->next) {
+ blk = malloc(sizeof(*blk));
+ if (blk == NULL)
+ goto fail_blk;
+
+ memcpy(blk, it, sizeof(*it));
+ blk->next = NULL;
+
+ *next = blk;
+ next = &(blk->next);
+ }
+
+ return (sqfs_object_t *)copy;
+fail_blk:
+ while (copy->kv_blocks != NULL) {
+ blk = copy->kv_blocks;
+ copy->kv_blocks = copy->kv_blocks->next;
+ free(blk);
+ }
+fail_pairs:
+ str_table_cleanup(&copy->values);
+fail_values:
+ str_table_cleanup(&copy->keys);
+fail_keys:
+ free(copy);
+ return NULL;
+}
+
+static void xattr_writer_destroy(sqfs_object_t *obj)
+{
+ sqfs_xattr_writer_t *xwr = (sqfs_xattr_writer_t *)obj;
+ kv_block_desc_t *blk;
+
+ while (xwr->kv_blocks != NULL) {
+ blk = xwr->kv_blocks;
+ xwr->kv_blocks = xwr->kv_blocks->next;
+ free(blk);
+ }
+
+ free(xwr->kv_pairs);
+ str_table_cleanup(&xwr->values);
+ str_table_cleanup(&xwr->keys);
+ free(xwr);
+}
+
+sqfs_xattr_writer_t *sqfs_xattr_writer_create(void)
+{
+ sqfs_xattr_writer_t *xwr = calloc(1, sizeof(*xwr));
+
+ if (str_table_init(&xwr->keys, XATTR_KEY_BUCKETS))
+ goto fail_keys;
+
+ if (str_table_init(&xwr->values, XATTR_VALUE_BUCKETS))
+ goto fail_values;
+
+ xwr->max_pairs = XATTR_INITIAL_PAIR_CAP;
+ xwr->kv_pairs = alloc_array(sizeof(xwr->kv_pairs[0]), xwr->max_pairs);
+
+ if (xwr->kv_pairs == NULL)
+ goto fail_pairs;
+
+ ((sqfs_object_t *)xwr)->copy = xattr_writer_copy;
+ ((sqfs_object_t *)xwr)->destroy = xattr_writer_destroy;
+ return xwr;
+fail_pairs:
+ str_table_cleanup(&xwr->values);
+fail_values:
+ str_table_cleanup(&xwr->keys);
+fail_keys:
+ free(xwr);
+ return NULL;
+}