QEMU dmg support includes zlib and bzip2, but it does not contains lzfse
support. This commit adds the source file to extend compression support
for new DMGs.
Signed-off-by: Julio Faracco <jcfara...@gmail.com>
---
block/dmg-lzfse.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 block/dmg-lzfse.c
diff --git a/block/dmg-lzfse.c b/block/dmg-lzfse.c
new file mode 100644
index 0000000000..19d25bc646
--- /dev/null
+++ b/block/dmg-lzfse.c
@@ -0,0 +1,49 @@
+/*
+ * DMG lzfse uncompression
+ *
+ * Copyright (c) 2018 Julio Cesar Faracco
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "dmg.h"
+#include <lzfse.h>
+
+static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in,
+ char *next_out, unsigned int avail_out)
+{
+ size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out,
+ (uint8_t *) next_in, avail_in,
+ NULL);
+
+ /* We need to decode the single chunk only. */
+ /* So, out_size == avail_out is not an error here. */
+ if (out_size > 0) {
+ return out_size;
+ }
+ return -1;
+}
+
+__attribute__((constructor))
+static void dmg_lzfse_init(void)
+{
+ assert(!dmg_uncompress_lzfse);
+ dmg_uncompress_lzfse = dmg_uncompress_lzfse_do;
+}
--
2.17.1
