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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-02-25 09:13:39 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-02-27 01:05:42 +0100
commit3c1a4c2548cbbae96f44469278b53046c8b48868 (patch)
treecf528c5338f850012744e3376eae502767bfdc21 /lib/sqfs/comp/xz.c
parentc9429aeece3b8642de637f7a21e68046bd690658 (diff)
Add a function to the compressor interface to get the configuration
This allows getting the compressor configuration back after creating it, for various purposes. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/comp/xz.c')
-rw-r--r--lib/sqfs/comp/xz.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/sqfs/comp/xz.c b/lib/sqfs/comp/xz.c
index d612729..a600956 100644
--- a/lib/sqfs/comp/xz.c
+++ b/lib/sqfs/comp/xz.c
@@ -196,6 +196,21 @@ static sqfs_s32 xz_uncomp_block(sqfs_compressor_t *base, const sqfs_u8 *in,
return SQFS_ERROR_COMPRESSOR;
}
+static void xz_get_configuration(const sqfs_compressor_t *base,
+ sqfs_compressor_config_t *cfg)
+{
+ const xz_compressor_t *xz = (const xz_compressor_t *)base;
+
+ memset(cfg, 0, sizeof(*cfg));
+ cfg->id = SQFS_COMP_XZ;
+ cfg->flags = xz->flags;
+ cfg->block_size = xz->block_size;
+ cfg->opt.xz.dict_size = xz->dict_size;
+
+ if (base->do_block == xz_uncomp_block)
+ cfg->flags |= SQFS_COMP_FLAG_UNCOMPRESS;
+}
+
static sqfs_compressor_t *xz_create_copy(sqfs_compressor_t *cmp)
{
xz_compressor_t *xz = malloc(sizeof(*xz));
@@ -233,6 +248,7 @@ sqfs_compressor_t *xz_compressor_create(const sqfs_compressor_config_t *cfg)
xz->flags = cfg->flags;
xz->dict_size = cfg->opt.xz.dict_size;
xz->block_size = cfg->block_size;
+ base->get_configuration = xz_get_configuration;
base->do_block = (cfg->flags & SQFS_COMP_FLAG_UNCOMPRESS) ?
xz_uncomp_block : xz_comp_block;
base->write_options = xz_write_options;