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

xz/src/liblzma/rangecoder/price_tablegen.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       price_tablegen.c
+/// \brief      Probability price table generator
+///
+/// Compiling: gcc -std=c99 -o price_tablegen price_tablegen.c
+///
+//  Authors:    Igor Pavlov
+//              Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <inttypes.h>
+#include <stdio.h>
+#include "range_common.h"
+#include "price.h"
+
+
+static uint32_t rc_prices[RC_PRICE_TABLE_SIZE];
+
+
+static void
+init_price_table(void)
+{
+        for (uint32_t i = (UINT32_C(1) << RC_MOVE_REDUCING_BITS) / 2;
+                        i < RC_BIT_MODEL_TOTAL;
+                        i += (UINT32_C(1) << RC_MOVE_REDUCING_BITS)) {
+                const uint32_t cycles_bits = RC_BIT_PRICE_SHIFT_BITS;
+                uint32_t w = i;
+                uint32_t bit_count = 0;
+
+                for (uint32_t j = 0; j < cycles_bits; ++j) {
+                        w *= w;
+                        bit_count <<= 1;
+
+                        while (w >= (UINT32_C(1) << 16)) {
+                                w >>= 1;
+                                ++bit_count;
+                        }
+                }
+
+                rc_prices[i >> RC_MOVE_REDUCING_BITS]
+                                = (RC_BIT_MODEL_TOTAL_BITS << cycles_bits)
+                                - 15 - bit_count;
+        }
+
+        return;
+}
+
+
+static void
+print_price_table(void)
+{
+        printf("/* This file has been automatically generated by "
+                        "price_tablegen.c. */\n\n"
+                        "#include \"range_encoder.h\"\n\n"
+                        "const uint8_t lzma_rc_prices["
+                        "RC_PRICE_TABLE_SIZE] = {");
+
+        const size_t array_size = sizeof(lzma_rc_prices)
+                        / sizeof(lzma_rc_prices[0]);
+        for (size_t i = 0; i < array_size; ++i) {
+                if (i % 8 == 0)
+                        printf("\n\t");
+
+                printf("%4" PRIu32, rc_prices[i]);
+
+                if (i != array_size - 1)
+                        printf(",");
+        }
+
+        printf("\n};\n");
+
+        return;
+}
+
+
+int
+main(void)
+{
+        init_price_table();
+        print_price_table();
+        return 0;
+}