test/cctest/test-bignum-dtoa.cc - third_party/double-conversion - Git at Google

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include <stdlib.h>

 #include "double-conversion/bignum-dtoa.h"

 #include "cctest.h"
 #include "gay-fixed.h"
 #include "gay-precision.h"
 #include "gay-shortest.h"
 #include "gay-shortest-single.h"
 #include "double-conversion/ieee.h"
 #include "double-conversion/utils.h"

 using namespace double_conversion;


 // Removes trailing '0' digits.
 // Can return the empty string if all digits are 0.
 static void TrimRepresentation(Vector<char> representation) {
   int len = strlen(representation.start());
   int i;
   for (i = len - 1; i >= 0; --i) {
     if (representation[i] != '0') break;
   }
   representation[i + 1] = '\0';
 }


 static const int kBufferSize = 100;


 TEST(BignumDtoaVariousDoubles) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   BignumDtoa(1.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("1", buffer.start());
   CHECK_EQ(1, point);

   BignumDtoa(1.0, BIGNUM_DTOA_FIXED, 3, buffer, &length, &point);
   CHECK_GE(3, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("1", buffer.start());
   CHECK_EQ(1, point);

   BignumDtoa(1.0, BIGNUM_DTOA_PRECISION, 3, buffer, &length, &point);
   CHECK_GE(3, length);
   TrimRepresentation(buffer);
   CHECK_EQ("1", buffer.start());
   CHECK_EQ(1, point);

   BignumDtoa(1.5, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("15", buffer.start());
   CHECK_EQ(1, point);

   BignumDtoa(1.5, BIGNUM_DTOA_FIXED, 10, buffer, &length, &point);
   CHECK_GE(10, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("15", buffer.start());
   CHECK_EQ(1, point);

   BignumDtoa(1.5, BIGNUM_DTOA_PRECISION, 10, buffer, &length, &point);
   CHECK_GE(10, length);
   TrimRepresentation(buffer);
   CHECK_EQ("15", buffer.start());
   CHECK_EQ(1, point);

   double min_double = 5e-324;
   BignumDtoa(min_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("5", buffer.start());
   CHECK_EQ(-323, point);

   BignumDtoa(min_double, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
   CHECK_GE(5, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("", buffer.start());

   BignumDtoa(min_double, BIGNUM_DTOA_PRECISION, 5, buffer, &length, &point);
   CHECK_GE(5, length);
   TrimRepresentation(buffer);
   CHECK_EQ("49407", buffer.start());
   CHECK_EQ(-323, point);

   double max_double = 1.7976931348623157e308;
   BignumDtoa(max_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("17976931348623157", buffer.start());
   CHECK_EQ(309, point);

   BignumDtoa(max_double, BIGNUM_DTOA_PRECISION, 7, buffer, &length, &point);
   CHECK_GE(7, length);
   TrimRepresentation(buffer);
   CHECK_EQ("1797693", buffer.start());
   CHECK_EQ(309, point);

   BignumDtoa(4294967272.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("4294967272", buffer.start());
   CHECK_EQ(10, point);

   BignumDtoa(4294967272.0, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
   CHECK_EQ("429496727200000", buffer.start());
   CHECK_EQ(10, point);


   BignumDtoa(4294967272.0, BIGNUM_DTOA_PRECISION, 14, buffer, &length, &point);
   CHECK_GE(14, length);
   TrimRepresentation(buffer);
   CHECK_EQ("4294967272", buffer.start());
   CHECK_EQ(10, point);

   BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("4185580496821357", buffer.start());
   CHECK_EQ(299, point);

   BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_PRECISION, 20,
              buffer, &length, &point);
   CHECK_GE(20, length);
   TrimRepresentation(buffer);
   CHECK_EQ("41855804968213567225", buffer.start());
   CHECK_EQ(299, point);

   BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("5562684646268003", buffer.start());
   CHECK_EQ(-308, point);

   BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_PRECISION, 1,
              buffer, &length, &point);
   CHECK_GE(1, length);
   TrimRepresentation(buffer);
   CHECK_EQ("6", buffer.start());
   CHECK_EQ(-308, point);

   BignumDtoa(2147483648.0, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("2147483648", buffer.start());
   CHECK_EQ(10, point);


   BignumDtoa(2147483648.0, BIGNUM_DTOA_FIXED, 2,
              buffer, &length, &point);
   CHECK_GE(2, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("2147483648", buffer.start());
   CHECK_EQ(10, point);

   BignumDtoa(2147483648.0, BIGNUM_DTOA_PRECISION, 5,
              buffer, &length, &point);
   CHECK_GE(5, length);
   TrimRepresentation(buffer);
   CHECK_EQ("21475", buffer.start());
   CHECK_EQ(10, point);

   BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("35844466002796428", buffer.start());
   CHECK_EQ(299, point);

   BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_PRECISION, 10,
              buffer, &length, &point);
   CHECK_GE(10, length);
   TrimRepresentation(buffer);
   CHECK_EQ("35844466", buffer.start());
   CHECK_EQ(299, point);

   BignumDtoa(1e-23, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("1", buffer.start());
   CHECK_EQ(-22, point);

   uint64_t smallest_normal64 = DOUBLE_CONVERSION_UINT64_2PART_C(0x00100000, 00000000);
   double v = Double(smallest_normal64).value();
   BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("22250738585072014", buffer.start());
   CHECK_EQ(-307, point);

   BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
   CHECK_GE(20, length);
   TrimRepresentation(buffer);
   CHECK_EQ("22250738585072013831", buffer.start());
   CHECK_EQ(-307, point);

   uint64_t largest_denormal64 = DOUBLE_CONVERSION_UINT64_2PART_C(0x000FFFFF, FFFFFFFF);
   v = Double(largest_denormal64).value();
   BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("2225073858507201", buffer.start());
   CHECK_EQ(-307, point);

   BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
   CHECK_GE(20, length);
   TrimRepresentation(buffer);
   CHECK_EQ("2225073858507200889", buffer.start());
   CHECK_EQ(-307, point);

   BignumDtoa(4128420500802942e-24, BIGNUM_DTOA_SHORTEST, 0,
              buffer, &length, &point);
   CHECK_EQ("4128420500802942", buffer.start());
   CHECK_EQ(-8, point);

   v = 3.9292015898194142585311918e-10;
   BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
   CHECK_EQ("39292015898194143", buffer.start());

   v = 4194304.0;
   BignumDtoa(v, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
   CHECK_GE(5, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("4194304", buffer.start());

   v = 3.3161339052167390562200598e-237;
   BignumDtoa(v, BIGNUM_DTOA_PRECISION, 19, buffer, &length, &point);
   CHECK_GE(19, length);
   TrimRepresentation(buffer);
   CHECK_EQ("3316133905216739056", buffer.start());
   CHECK_EQ(-236, point);

   v = 7.9885183916008099497815232e+191;
   BignumDtoa(v, BIGNUM_DTOA_PRECISION, 4, buffer, &length, &point);
   CHECK_GE(4, length);
   TrimRepresentation(buffer);
   CHECK_EQ("7989", buffer.start());
   CHECK_EQ(192, point);

   v = 1.0000000000000012800000000e+17;
   BignumDtoa(v, BIGNUM_DTOA_FIXED, 1, buffer, &length, &point);
   CHECK_GE(1, length - point);
   TrimRepresentation(buffer);
   CHECK_EQ("100000000000000128", buffer.start());
   CHECK_EQ(18, point);
 }


 TEST(BignumDtoaShortestVariousFloats) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   float min_float = 1e-45f;
   BignumDtoa(min_float, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("1", buffer.start());
   CHECK_EQ(-44, point);


   float max_float = 3.4028234e38f;
   BignumDtoa(max_float, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("34028235", buffer.start());
   CHECK_EQ(39, point);

   BignumDtoa(4294967272.0f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("42949673", buffer.start());
   CHECK_EQ(10, point);

   BignumDtoa(3.32306998946228968226e+35f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("332307", buffer.start());
   CHECK_EQ(36, point);

   BignumDtoa(1.2341e-41f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("12341", buffer.start());
   CHECK_EQ(-40, point);

   BignumDtoa(3.3554432e7, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("33554432", buffer.start());
   CHECK_EQ(8, point);

   BignumDtoa(3.26494756798464e14f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("32649476", buffer.start());
   CHECK_EQ(15, point);

   BignumDtoa(3.91132223637771935344e37f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
              buffer, &length, &point);
   CHECK_EQ("39113222", buffer.start());
   CHECK_EQ(38, point);

   uint32_t smallest_normal32 = 0x00800000;
   double v = Single(smallest_normal32).value();
   BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
   CHECK_EQ("11754944", buffer.start());
   CHECK_EQ(-37, point);

   uint32_t largest_denormal32 = 0x007FFFFF;
   v = Single(largest_denormal32).value();
   BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
   CHECK_EQ("11754942", buffer.start());
   CHECK_EQ(-37, point);
 }


 TEST(BignumDtoaGayShortest) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   Vector<const PrecomputedShortest> precomputed =
       PrecomputedShortestRepresentations();
   for (int i = 0; i < precomputed.length(); ++i) {
     const PrecomputedShortest current_test = precomputed[i];
     double v = current_test.v;
     BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
     CHECK_EQ(current_test.decimal_point, point);
     CHECK_EQ(current_test.representation, buffer.start());
   }
 }


 TEST(BignumDtoaGayShortestSingle) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   Vector<const PrecomputedShortestSingle> precomputed =
       PrecomputedShortestSingleRepresentations();
   for (int i = 0; i < precomputed.length(); ++i) {
     const PrecomputedShortestSingle current_test = precomputed[i];
     float v = current_test.v;
     BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
     CHECK_EQ(current_test.decimal_point, point);
     CHECK_EQ(current_test.representation, buffer.start());
   }
 }


 TEST(BignumDtoaGayFixed) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   Vector<const PrecomputedFixed> precomputed =
       PrecomputedFixedRepresentations();
   for (int i = 0; i < precomputed.length(); ++i) {
     const PrecomputedFixed current_test = precomputed[i];
     double v = current_test.v;
     int number_digits = current_test.number_digits;
     BignumDtoa(v, BIGNUM_DTOA_FIXED, number_digits, buffer, &length, &point);
     CHECK_EQ(current_test.decimal_point, point);
     CHECK_GE(number_digits, length - point);
     TrimRepresentation(buffer);
     CHECK_EQ(current_test.representation, buffer.start());
   }
 }


 TEST(BignumDtoaGayPrecision) {
   char buffer_container[kBufferSize];
   Vector<char> buffer(buffer_container, kBufferSize);
   int length;
   int point;

   Vector<const PrecomputedPrecision> precomputed =
       PrecomputedPrecisionRepresentations();
   for (int i = 0; i < precomputed.length(); ++i) {
     const PrecomputedPrecision current_test = precomputed[i];
     double v = current_test.v;
     int number_digits = current_test.number_digits;
     BignumDtoa(v, BIGNUM_DTOA_PRECISION, number_digits,
                buffer, &length, &point);
     CHECK_EQ(current_test.decimal_point, point);
     CHECK_GE(number_digits, length);
     TrimRepresentation(buffer);
     CHECK_EQ(current_test.representation, buffer.start());
   }
 }
	// Copyright 2012 the V8 project authors. All rights reserved.
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following
	// disclaimer in the documentation and/or other materials provided
	// with the distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived
	// from this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include <stdlib.h>

	#include "double-conversion/bignum-dtoa.h"

	#include "cctest.h"
	#include "gay-fixed.h"
	#include "gay-precision.h"
	#include "gay-shortest.h"
	#include "gay-shortest-single.h"
	#include "double-conversion/ieee.h"
	#include "double-conversion/utils.h"

	using namespace double_conversion;


	// Removes trailing '0' digits.
	// Can return the empty string if all digits are 0.
	static void TrimRepresentation(Vector<char> representation) {
	int len = strlen(representation.start());
	int i;
	for (i = len - 1; i >= 0; --i) {
	if (representation[i] != '0') break;
	}
	representation[i + 1] = '\0';
	}


	static const int kBufferSize = 100;


	TEST(BignumDtoaVariousDoubles) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	BignumDtoa(1.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("1", buffer.start());
	CHECK_EQ(1, point);

	BignumDtoa(1.0, BIGNUM_DTOA_FIXED, 3, buffer, &length, &point);
	CHECK_GE(3, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("1", buffer.start());
	CHECK_EQ(1, point);

	BignumDtoa(1.0, BIGNUM_DTOA_PRECISION, 3, buffer, &length, &point);
	CHECK_GE(3, length);
	TrimRepresentation(buffer);
	CHECK_EQ("1", buffer.start());
	CHECK_EQ(1, point);

	BignumDtoa(1.5, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("15", buffer.start());
	CHECK_EQ(1, point);

	BignumDtoa(1.5, BIGNUM_DTOA_FIXED, 10, buffer, &length, &point);
	CHECK_GE(10, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("15", buffer.start());
	CHECK_EQ(1, point);

	BignumDtoa(1.5, BIGNUM_DTOA_PRECISION, 10, buffer, &length, &point);
	CHECK_GE(10, length);
	TrimRepresentation(buffer);
	CHECK_EQ("15", buffer.start());
	CHECK_EQ(1, point);

	double min_double = 5e-324;
	BignumDtoa(min_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("5", buffer.start());
	CHECK_EQ(-323, point);

	BignumDtoa(min_double, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
	CHECK_GE(5, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("", buffer.start());

	BignumDtoa(min_double, BIGNUM_DTOA_PRECISION, 5, buffer, &length, &point);
	CHECK_GE(5, length);
	TrimRepresentation(buffer);
	CHECK_EQ("49407", buffer.start());
	CHECK_EQ(-323, point);

	double max_double = 1.7976931348623157e308;
	BignumDtoa(max_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("17976931348623157", buffer.start());
	CHECK_EQ(309, point);

	BignumDtoa(max_double, BIGNUM_DTOA_PRECISION, 7, buffer, &length, &point);
	CHECK_GE(7, length);
	TrimRepresentation(buffer);
	CHECK_EQ("1797693", buffer.start());
	CHECK_EQ(309, point);

	BignumDtoa(4294967272.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("4294967272", buffer.start());
	CHECK_EQ(10, point);

	BignumDtoa(4294967272.0, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
	CHECK_EQ("429496727200000", buffer.start());
	CHECK_EQ(10, point);


	BignumDtoa(4294967272.0, BIGNUM_DTOA_PRECISION, 14, buffer, &length, &point);
	CHECK_GE(14, length);
	TrimRepresentation(buffer);
	CHECK_EQ("4294967272", buffer.start());
	CHECK_EQ(10, point);

	BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("4185580496821357", buffer.start());
	CHECK_EQ(299, point);

	BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_PRECISION, 20,
	buffer, &length, &point);
	CHECK_GE(20, length);
	TrimRepresentation(buffer);
	CHECK_EQ("41855804968213567225", buffer.start());
	CHECK_EQ(299, point);

	BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("5562684646268003", buffer.start());
	CHECK_EQ(-308, point);

	BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_PRECISION, 1,
	buffer, &length, &point);
	CHECK_GE(1, length);
	TrimRepresentation(buffer);
	CHECK_EQ("6", buffer.start());
	CHECK_EQ(-308, point);

	BignumDtoa(2147483648.0, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("2147483648", buffer.start());
	CHECK_EQ(10, point);


	BignumDtoa(2147483648.0, BIGNUM_DTOA_FIXED, 2,
	buffer, &length, &point);
	CHECK_GE(2, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("2147483648", buffer.start());
	CHECK_EQ(10, point);

	BignumDtoa(2147483648.0, BIGNUM_DTOA_PRECISION, 5,
	buffer, &length, &point);
	CHECK_GE(5, length);
	TrimRepresentation(buffer);
	CHECK_EQ("21475", buffer.start());
	CHECK_EQ(10, point);

	BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("35844466002796428", buffer.start());
	CHECK_EQ(299, point);

	BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_PRECISION, 10,
	buffer, &length, &point);
	CHECK_GE(10, length);
	TrimRepresentation(buffer);
	CHECK_EQ("35844466", buffer.start());
	CHECK_EQ(299, point);

	BignumDtoa(1e-23, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("1", buffer.start());
	CHECK_EQ(-22, point);

	uint64_t smallest_normal64 = DOUBLE_CONVERSION_UINT64_2PART_C(0x00100000, 00000000);
	double v = Double(smallest_normal64).value();
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("22250738585072014", buffer.start());
	CHECK_EQ(-307, point);

	BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
	CHECK_GE(20, length);
	TrimRepresentation(buffer);
	CHECK_EQ("22250738585072013831", buffer.start());
	CHECK_EQ(-307, point);

	uint64_t largest_denormal64 = DOUBLE_CONVERSION_UINT64_2PART_C(0x000FFFFF, FFFFFFFF);
	v = Double(largest_denormal64).value();
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("2225073858507201", buffer.start());
	CHECK_EQ(-307, point);

	BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
	CHECK_GE(20, length);
	TrimRepresentation(buffer);
	CHECK_EQ("2225073858507200889", buffer.start());
	CHECK_EQ(-307, point);

	BignumDtoa(4128420500802942e-24, BIGNUM_DTOA_SHORTEST, 0,
	buffer, &length, &point);
	CHECK_EQ("4128420500802942", buffer.start());
	CHECK_EQ(-8, point);

	v = 3.9292015898194142585311918e-10;
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ("39292015898194143", buffer.start());

	v = 4194304.0;
	BignumDtoa(v, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
	CHECK_GE(5, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("4194304", buffer.start());

	v = 3.3161339052167390562200598e-237;
	BignumDtoa(v, BIGNUM_DTOA_PRECISION, 19, buffer, &length, &point);
	CHECK_GE(19, length);
	TrimRepresentation(buffer);
	CHECK_EQ("3316133905216739056", buffer.start());
	CHECK_EQ(-236, point);

	v = 7.9885183916008099497815232e+191;
	BignumDtoa(v, BIGNUM_DTOA_PRECISION, 4, buffer, &length, &point);
	CHECK_GE(4, length);
	TrimRepresentation(buffer);
	CHECK_EQ("7989", buffer.start());
	CHECK_EQ(192, point);

	v = 1.0000000000000012800000000e+17;
	BignumDtoa(v, BIGNUM_DTOA_FIXED, 1, buffer, &length, &point);
	CHECK_GE(1, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ("100000000000000128", buffer.start());
	CHECK_EQ(18, point);
	}


	TEST(BignumDtoaShortestVariousFloats) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	float min_float = 1e-45f;
	BignumDtoa(min_float, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("1", buffer.start());
	CHECK_EQ(-44, point);


	float max_float = 3.4028234e38f;
	BignumDtoa(max_float, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("34028235", buffer.start());
	CHECK_EQ(39, point);

	BignumDtoa(4294967272.0f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("42949673", buffer.start());
	CHECK_EQ(10, point);

	BignumDtoa(3.32306998946228968226e+35f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("332307", buffer.start());
	CHECK_EQ(36, point);

	BignumDtoa(1.2341e-41f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("12341", buffer.start());
	CHECK_EQ(-40, point);

	BignumDtoa(3.3554432e7, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("33554432", buffer.start());
	CHECK_EQ(8, point);

	BignumDtoa(3.26494756798464e14f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("32649476", buffer.start());
	CHECK_EQ(15, point);

	BignumDtoa(3.91132223637771935344e37f, BIGNUM_DTOA_SHORTEST_SINGLE, 0,
	buffer, &length, &point);
	CHECK_EQ("39113222", buffer.start());
	CHECK_EQ(38, point);

	uint32_t smallest_normal32 = 0x00800000;
	double v = Single(smallest_normal32).value();
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
	CHECK_EQ("11754944", buffer.start());
	CHECK_EQ(-37, point);

	uint32_t largest_denormal32 = 0x007FFFFF;
	v = Single(largest_denormal32).value();
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
	CHECK_EQ("11754942", buffer.start());
	CHECK_EQ(-37, point);
	}


	TEST(BignumDtoaGayShortest) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	Vector<const PrecomputedShortest> precomputed =
	PrecomputedShortestRepresentations();
	for (int i = 0; i < precomputed.length(); ++i) {
	const PrecomputedShortest current_test = precomputed[i];
	double v = current_test.v;
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
	CHECK_EQ(current_test.decimal_point, point);
	CHECK_EQ(current_test.representation, buffer.start());
	}
	}


	TEST(BignumDtoaGayShortestSingle) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	Vector<const PrecomputedShortestSingle> precomputed =
	PrecomputedShortestSingleRepresentations();
	for (int i = 0; i < precomputed.length(); ++i) {
	const PrecomputedShortestSingle current_test = precomputed[i];
	float v = current_test.v;
	BignumDtoa(v, BIGNUM_DTOA_SHORTEST_SINGLE, 0, buffer, &length, &point);
	CHECK_EQ(current_test.decimal_point, point);
	CHECK_EQ(current_test.representation, buffer.start());
	}
	}


	TEST(BignumDtoaGayFixed) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	Vector<const PrecomputedFixed> precomputed =
	PrecomputedFixedRepresentations();
	for (int i = 0; i < precomputed.length(); ++i) {
	const PrecomputedFixed current_test = precomputed[i];
	double v = current_test.v;
	int number_digits = current_test.number_digits;
	BignumDtoa(v, BIGNUM_DTOA_FIXED, number_digits, buffer, &length, &point);
	CHECK_EQ(current_test.decimal_point, point);
	CHECK_GE(number_digits, length - point);
	TrimRepresentation(buffer);
	CHECK_EQ(current_test.representation, buffer.start());
	}
	}


	TEST(BignumDtoaGayPrecision) {
	char buffer_container[kBufferSize];
	Vector<char> buffer(buffer_container, kBufferSize);
	int length;
	int point;

	Vector<const PrecomputedPrecision> precomputed =
	PrecomputedPrecisionRepresentations();
	for (int i = 0; i < precomputed.length(); ++i) {
	const PrecomputedPrecision current_test = precomputed[i];
	double v = current_test.v;
	int number_digits = current_test.number_digits;
	BignumDtoa(v, BIGNUM_DTOA_PRECISION, number_digits,
	buffer, &length, &point);
	CHECK_EQ(current_test.decimal_point, point);
	CHECK_GE(number_digits, length);
	TrimRepresentation(buffer);
	CHECK_EQ(current_test.representation, buffer.start());
	}
	}