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

xz/src/liblzma/lzma/fastpos_tablegen.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       fastpos_tablegen.c
+/// \brief      Generates the lzma_fastpos[] lookup table
+///
+//  Authors:    Igor Pavlov
+//              Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include "fastpos.h"
+
+
+int
+main(void)
+{
+        uint8_t fastpos[1 << FASTPOS_BITS];
+
+        const uint8_t fast_slots = 2 * FASTPOS_BITS;
+        uint32_t c = 2;
+
+        fastpos[0] = 0;
+        fastpos[1] = 1;
+
+        for (uint8_t slot_fast = 2; slot_fast < fast_slots; ++slot_fast) {
+                const uint32_t k = 1 << ((slot_fast >> 1) - 1);
+                for (uint32_t j = 0; j < k; ++j, ++c)
+                        fastpos[c] = slot_fast;
+        }
+
+        printf("/* This file has been automatically generated "
+                        "by fastpos_tablegen.c. */\n\n"
+                        "#include \"common.h\"\n"
+                        "#include \"fastpos.h\"\n\n"
+                        "const uint8_t lzma_fastpos[1 << FASTPOS_BITS] = {");
+
+        for (size_t i = 0; i < (1 << FASTPOS_BITS); ++i) {
+                if (i % 16 == 0)
+                        printf("\n\t");
+
+                printf("%3u", (unsigned int)(fastpos[i]));
+
+                if (i != (1 << FASTPOS_BITS) - 1)
+                        printf(",");
+        }
+
+        printf("\n};\n");
+
+        return 0;
+}