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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/common/comp_lzo.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/common/comp_lzo.c')
-rw-r--r--lib/common/comp_lzo.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/lib/common/comp_lzo.c b/lib/common/comp_lzo.c
index 24f4009..0956e0e 100644
--- a/lib/common/comp_lzo.c
+++ b/lib/common/comp_lzo.c
@@ -217,25 +217,26 @@ static void lzo_destroy(sqfs_object_t *base)
free(base);
}
-sqfs_compressor_t *lzo_compressor_create(const sqfs_compressor_config_t *cfg)
+int lzo_compressor_create(const sqfs_compressor_config_t *cfg,
+ sqfs_compressor_t **out)
{
sqfs_compressor_t *base;
lzo_compressor_t *lzo;
size_t scratch_size;
if (cfg->flags & ~SQFS_COMP_FLAG_GENERIC_ALL)
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
if (cfg->opt.lzo.algorithm >= LZO_NUM_ALGS ||
lzo_algs[cfg->opt.lzo.algorithm].compress == NULL) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
if (cfg->opt.lzo.algorithm == SQFS_LZO1X_999) {
if (cfg->opt.lzo.level > SQFS_LZO_MAX_LEVEL)
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
} else if (cfg->opt.lzo.level != 0) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
/* XXX: liblzo does not do bounds checking internally,
@@ -257,7 +258,7 @@ sqfs_compressor_t *lzo_compressor_create(const sqfs_compressor_config_t *cfg)
base = (sqfs_compressor_t *)lzo;
if (lzo == NULL)
- return NULL;
+ return SQFS_ERROR_ALLOC;
lzo->block_size = cfg->block_size;
lzo->algorithm = cfg->opt.lzo.algorithm;
@@ -272,5 +273,7 @@ sqfs_compressor_t *lzo_compressor_create(const sqfs_compressor_config_t *cfg)
base->read_options = lzo_read_options;
((sqfs_object_t *)base)->copy = lzo_create_copy;
((sqfs_object_t *)base)->destroy = lzo_destroy;
- return base;
+
+ *out = base;
+ return 0;
}