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- // 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 "bignum-dtoa.h"
- #include "cctest.h"
- #include "gay-fixed.h"
- #include "gay-precision.h"
- #include "gay-shortest.h"
- #include "gay-shortest-single.h"
- #include "ieee.h"
- #include "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);
- uint64_t smallest_normal64 = 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 = 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());
- }
- }
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