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diff --git a/src/liblzma/api/lzma/index.h b/src/liblzma/api/lzma/index.h
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+/**
+ * \file        lzma/index.h
+ * \brief       Handling of Index lists
+ *
+ * \author      Copyright (C) 1999-2006 Igor Pavlov
+ * \author      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_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief
+ *
+ * FIXME desc
+ */
+typedef struct lzma_index_s lzma_index;
+struct lzma_index_s {
+	/**
+	 * \brief       Total Size of the Block
+	 *
+	 * This includes Block Header, Compressed Data, and Block Footer.
+	 */
+	lzma_vli total_size;
+
+	/**
+	 * \brief       Uncompressed Size of the Block
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Pointer to the next Index Record
+	 *
+	 * This is NULL on the last Index Record.
+	 */
+	lzma_index *next;
+};
+
+
+/**
+ * \brief       Duplicates an Index list
+ *
+ * \return      A copy of the Index list, or NULL if memory allocation
+ *              failed or the original Index was empty.
+ */
+extern lzma_index *lzma_index_dup(
+		const lzma_index *index, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Frees an Index list
+ *
+ * All Index Recors in the list are freed. This function is convenient when
+ * getting rid of lzma_metadata structures containing an Index.
+ */
+extern void lzma_index_free(lzma_index *index, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Calculates information about the Index
+ *
+ * \return      LZMA_OK on success, LZMA_PROG_ERROR on error. FIXME
+ */
+extern lzma_ret lzma_index_count(const lzma_index *index, size_t *count,
+		lzma_vli *lzma_restrict total_size,
+		lzma_vli *lzma_restrict uncompressed_size);
+
+
+/**
+ * \brief       Compares if two Index lists are identical
+ */
+extern lzma_bool lzma_index_is_equal(const lzma_index *a, const lzma_index *b);