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

xz/src/liblzma/common/filter_common.h

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       filter_common.c
+/// \brief      Filter-specific stuff common for both 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_FILTER_COMMON_H
+#define LZMA_FILTER_COMMON_H
+
+#include "common.h"
+
+
+/// Both lzma_filter_encoder and lzma_filter_decoder begin with these members.
+typedef struct {
+        /// Filter ID
+        lzma_vli id;
+
+        /// Initializes the filter encoder and calls lzma_next_filter_init()
+        /// for filters + 1.
+        lzma_init_function init;
+
+        /// Calculates memory usage of the encoder. If the options are
+        /// invalid, UINT64_MAX is returned.
+        uint64_t (*memusage)(const void *options);
+
+} lzma_filter_coder;
+
+
+typedef const lzma_filter_coder *(*lzma_filter_find)(lzma_vli id);
+
+
+extern lzma_ret lzma_raw_coder_init(
+                lzma_next_coder *next, lzma_allocator *allocator,
+                const lzma_filter *filters,
+                lzma_filter_find coder_find, bool is_encoder);
+
+
+extern uint64_t lzma_raw_coder_memusage(lzma_filter_find coder_find,
+                const lzma_filter *filters);
+
+
+#endif