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-rw-r--r--src/liblzma/common/block_private.h46
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diff --git a/src/liblzma/common/block_private.h b/src/liblzma/common/block_private.h
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+++ b/src/liblzma/common/block_private.h
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file block_private.h
+/// \brief Common stuff for Block encoder and decoder
+//
+// Copyright (C) 2007 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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_BLOCK_COMMON_H
+#define LZMA_BLOCK_COMMON_H
+
+#include "common.h"
+
+static inline bool
+update_size(lzma_vli *size, lzma_vli add, lzma_vli limit)
+{
+ if (limit > LZMA_VLI_VALUE_MAX)
+ limit = LZMA_VLI_VALUE_MAX;
+
+ if (limit < *size || limit - *size < add)
+ return true;
+
+ *size += add;
+
+ return false;
+}
+
+
+static inline bool
+is_size_valid(lzma_vli size, lzma_vli reference)
+{
+ return reference == LZMA_VLI_VALUE_UNKNOWN || reference == size;
+}
+
+#endif