Update the code to mostly match the new simpler file format

specification. Simplify things by removing most of the
support for known uncompressed size in most places.
There are some miscellaneous changes here and there too.

The API of liblzma has got many changes and still some
more will be done soon. While most of the code has been
updated, some things are not fixed (the command line tool
will choke with invalid filter chain, if nothing else).

Subblock filter is somewhat broken for now. It will be
updated once the encoded format of the Subblock filter
has been decided.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/liblzma/common/stream_flags_equal.c b/src/liblzma/common/stream_flags_equal.c
new file mode 100644
index 00000000..db22567f
--- /dev/null
+++ b/src/liblzma/common/stream_flags_equal.c
@@ -0,0 +1,36 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       stream_flags_equal.c
+/// \brief      Compare Stream Header and Stream Footer
+//
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API lzma_bool
+lzma_stream_flags_equal(const lzma_stream_flags *a, lzma_stream_flags *b)
+{
+	if (a->check != b->check)
+		return false;
+
+	// Backward Sizes are compared only if they are known in both.
+	if (a->backward_size != LZMA_VLI_VALUE_UNKNOWN
+			&& b->backward_size != LZMA_VLI_VALUE_UNKNOWN
+			&& a->backward_size != b->backward_size)
+		return false;
+
+	return true;
+}