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/* 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(©->keys, &xwr->keys))
goto fail_keys;
if (str_table_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(©->values);
fail_values:
str_table_cleanup(©->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(sqfs_u32 flags)
{
sqfs_xattr_writer_t *xwr;
if (flags != 0)
return NULL;
xwr = calloc(1, sizeof(*xwr));
if (xwr == NULL)
return NULL;
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;
}
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