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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-05 22:38:15 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-03-05 22:41:04 +0100
commit85e36aab1258d8d9ec7b61ce013f167ef8e03ae0 (patch)
treeb1d59cce7894520b53c6b1fa86666d91587aaf82 /lib/sqfs/comp/lz4.c
parent5acb22a6a7168f8b961777482f39a125158def50 (diff)
Change the signature of sqfs_compressor_create to return an error code
Make sure the function has a way of telling the caller *why* it failed. This way, the function can convey whether it had an internal error, an allocation failure, whether the arguments are totaly nonsensical, or simply that the compressor *or specific configuration* is not supported. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/comp/lz4.c')
-rw-r--r--lib/sqfs/comp/lz4.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/lib/sqfs/comp/lz4.c b/lib/sqfs/comp/lz4.c
index 460ac44..4791746 100644
--- a/lib/sqfs/comp/lz4.c
+++ b/lib/sqfs/comp/lz4.c
@@ -132,20 +132,21 @@ static void lz4_destroy(sqfs_object_t *base)
free(base);
}
-sqfs_compressor_t *lz4_compressor_create(const sqfs_compressor_config_t *cfg)
+int lz4_compressor_create(const sqfs_compressor_config_t *cfg,
+ sqfs_compressor_t **out)
{
sqfs_compressor_t *base;
lz4_compressor_t *lz4;
if (cfg->flags & ~(SQFS_COMP_FLAG_LZ4_ALL |
SQFS_COMP_FLAG_GENERIC_ALL)) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
lz4 = calloc(1, sizeof(*lz4));
base = (sqfs_compressor_t *)lz4;
if (lz4 == NULL)
- return NULL;
+ return SQFS_ERROR_ALLOC;
lz4->high_compression = (cfg->flags & SQFS_COMP_FLAG_LZ4_HC) != 0;
lz4->block_size = cfg->block_size;
@@ -157,5 +158,7 @@ sqfs_compressor_t *lz4_compressor_create(const sqfs_compressor_config_t *cfg)
base->read_options = lz4_read_options;
((sqfs_object_t *)base)->copy = lz4_create_copy;
((sqfs_object_t *)base)->destroy = lz4_destroy;
- return base;
+
+ *out = base;
+ return 0;
}