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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-09-14 14:59:31 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2020-09-16 09:34:35 +0200
commitc9f5cfd3df2706da940a39d6d816ad084ba80fbd (patch)
tree3aac86238ce840c3c25ff89892f6109c081f60d8 /lib/fstream/uncompress/istream_compressor.c
parentf757737060d4daebb24a32e90d912661428708a8 (diff)
Implement istream decompression support
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/fstream/uncompress/istream_compressor.c')
-rw-r--r--lib/fstream/uncompress/istream_compressor.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/fstream/uncompress/istream_compressor.c b/lib/fstream/uncompress/istream_compressor.c
new file mode 100644
index 0000000..924f309
--- /dev/null
+++ b/lib/fstream/uncompress/istream_compressor.c
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * istream_compressor.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+static const char *comp_get_filename(istream_t *strm)
+{
+ istream_comp_t *comp = (istream_comp_t *)strm;
+
+ return comp->wrapped->get_filename(comp->wrapped);
+}
+
+static void comp_destroy(sqfs_object_t *obj)
+{
+ istream_comp_t *comp = (istream_comp_t *)obj;
+
+ comp->cleanup(comp);
+ sqfs_destroy(comp->wrapped);
+ free(comp);
+}
+
+istream_t *istream_compressor_create(istream_t *strm, int comp_id)
+{
+ istream_comp_t *comp = NULL;
+ sqfs_object_t *obj;
+ istream_t *base;
+
+ switch (comp_id) {
+ case FSTREAM_COMPRESSOR_GZIP:
+#ifdef WITH_GZIP
+ comp = istream_gzip_create(strm->get_filename(strm));
+#endif
+ break;
+ case FSTREAM_COMPRESSOR_XZ:
+#ifdef WITH_XZ
+ comp = istream_xz_create(strm->get_filename(strm));
+#endif
+ break;
+ default:
+ break;
+ }
+
+ if (comp == NULL)
+ return NULL;
+
+ comp->wrapped = strm;
+
+ base = (istream_t *)comp;
+ base->get_filename = comp_get_filename;
+ base->buffer = comp->uncompressed;
+ base->eof = false;
+
+ obj = (sqfs_object_t *)comp;
+ obj->destroy = comp_destroy;
+ return base;
+}