Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/liblzma/delta/delta_private.h

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       delta_private.h
+/// \brief      Private common stuff for Delta encoder and decoder
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_DELTA_PRIVATE_H
+#define LZMA_DELTA_PRIVATE_H
+
+#include "delta_common.h"
+
+struct lzma_coder_s {
+        /// Next coder in the chain
+        lzma_next_coder next;
+
+        /// Delta distance
+        size_t distance;
+
+        /// Position in history[]
+        uint8_t pos;
+
+        /// Buffer to hold history of the original data
+        uint8_t history[LZMA_DELTA_DIST_MAX];
+};
+
+
+extern lzma_ret lzma_delta_coder_init(
+                lzma_next_coder *next, lzma_allocator *allocator,
+                const lzma_filter_info *filters);
+
+#endif