integrate lzma

[zpackage] / lzma / common / stream_flags_common.h

diff --git a/lzma/common/stream_flags_common.h b/lzma/common/stream_flags_common.h
new file mode 100644 (file)
index 0000000..9f3122a
--- /dev/null
+++ b/lzma/common/stream_flags_common.h
@@ -0,0 +1,33 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       stream_flags_common.h
+/// \brief      Common stuff for Stream flags coders
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_STREAM_FLAGS_COMMON_H
+#define LZMA_STREAM_FLAGS_COMMON_H
+
+#include "common.h"
+
+/// Size of the Stream Flags field
+#define LZMA_STREAM_FLAGS_SIZE 2
+
+extern const uint8_t lzma_header_magic[6];
+extern const uint8_t lzma_footer_magic[2];
+
+
+static inline bool
+is_backward_size_valid(const lzma_stream_flags *options)
+{
+       return options->backward_size >= LZMA_BACKWARD_SIZE_MIN
+                       && options->backward_size <= LZMA_BACKWARD_SIZE_MAX
+                       && (options->backward_size & 3) == 0;
+}
+
+#endif