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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/gzip.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/gzip.c')
-rw-r--r--lib/sqfs/comp/gzip.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/lib/sqfs/comp/gzip.c b/lib/sqfs/comp/gzip.c
index 351d733..d702da1 100644
--- a/lib/sqfs/comp/gzip.c
+++ b/lib/sqfs/comp/gzip.c
@@ -247,7 +247,8 @@ static sqfs_object_t *gzip_create_copy(const sqfs_object_t *cmp)
return (sqfs_object_t *)gzip;
}
-sqfs_compressor_t *gzip_compressor_create(const sqfs_compressor_config_t *cfg)
+int gzip_compressor_create(const sqfs_compressor_config_t *cfg,
+ sqfs_compressor_t **out)
{
gzip_compressor_t *gzip;
sqfs_compressor_t *base;
@@ -255,24 +256,24 @@ sqfs_compressor_t *gzip_compressor_create(const sqfs_compressor_config_t *cfg)
if (cfg->flags & ~(SQFS_COMP_FLAG_GZIP_ALL |
SQFS_COMP_FLAG_GENERIC_ALL)) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
if (cfg->opt.gzip.level < SQFS_GZIP_MIN_LEVEL ||
cfg->opt.gzip.level > SQFS_GZIP_MAX_LEVEL) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
if (cfg->opt.gzip.window_size < SQFS_GZIP_MIN_WINDOW ||
cfg->opt.gzip.window_size > SQFS_GZIP_MAX_WINDOW) {
- return NULL;
+ return SQFS_ERROR_UNSUPPORTED;
}
gzip = calloc(1, sizeof(*gzip));
base = (sqfs_compressor_t *)gzip;
if (gzip == NULL)
- return NULL;
+ return SQFS_ERROR_ALLOC;
gzip->opt.level = cfg->opt.gzip.level;
gzip->opt.window = cfg->opt.gzip.window_size;
@@ -296,8 +297,9 @@ sqfs_compressor_t *gzip_compressor_create(const sqfs_compressor_config_t *cfg)
if (ret != Z_OK) {
free(gzip);
- return NULL;
+ return SQFS_ERROR_COMPRESSOR;
}
- return base;
+ *out = base;
+ return 0;
}