| // Copyright 2010 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 "v8.h" |
| |
| #include "dtoa.h" |
| |
| #include "cctest.h" |
| #include "double.h" |
| #include "gay-fixed.h" |
| #include "gay-precision.h" |
| #include "gay-shortest.h" |
| #include "platform.h" |
| |
| |
| using namespace v8::internal; |
| |
| |
| // Removes trailing '0' digits. |
| 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(DtoaVariousDoubles) { |
| char buffer_container[kBufferSize]; |
| Vector<char> buffer(buffer_container, kBufferSize); |
| int length; |
| int point; |
| int sign; |
| |
| DoubleToAscii(0.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("0", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(0.0, DTOA_FIXED, 2, buffer, &sign, &length, &point); |
| CHECK_EQ(1, length); |
| CHECK_EQ("0", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(0.0, DTOA_PRECISION, 3, buffer, &sign, &length, &point); |
| CHECK_EQ(1, length); |
| CHECK_EQ("0", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("1", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.0, DTOA_FIXED, 3, buffer, &sign, &length, &point); |
| CHECK_GE(3, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ("1", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.0, DTOA_PRECISION, 3, buffer, &sign, &length, &point); |
| CHECK_GE(3, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("1", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.5, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("15", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.5, DTOA_FIXED, 10, buffer, &sign, &length, &point); |
| CHECK_GE(10, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ("15", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| DoubleToAscii(1.5, DTOA_PRECISION, 10, buffer, &sign, &length, &point); |
| CHECK_GE(10, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("15", buffer.start()); |
| CHECK_EQ(1, point); |
| |
| double min_double = 5e-324; |
| DoubleToAscii(min_double, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("5", buffer.start()); |
| CHECK_EQ(-323, point); |
| |
| DoubleToAscii(min_double, DTOA_FIXED, 5, buffer, &sign, &length, &point); |
| CHECK_GE(5, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ("", buffer.start()); |
| CHECK_GE(-5, point); |
| |
| DoubleToAscii(min_double, DTOA_PRECISION, 5, buffer, &sign, &length, &point); |
| CHECK_GE(5, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("49407", buffer.start()); |
| CHECK_EQ(-323, point); |
| |
| double max_double = 1.7976931348623157e308; |
| DoubleToAscii(max_double, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("17976931348623157", buffer.start()); |
| CHECK_EQ(309, point); |
| |
| DoubleToAscii(max_double, DTOA_PRECISION, 7, buffer, &sign, &length, &point); |
| CHECK_GE(7, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("1797693", buffer.start()); |
| CHECK_EQ(309, point); |
| |
| DoubleToAscii(4294967272.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("4294967272", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| DoubleToAscii(4294967272.0, DTOA_FIXED, 5, buffer, &sign, &length, &point); |
| CHECK_GE(5, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ("4294967272", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| |
| DoubleToAscii(4294967272.0, DTOA_PRECISION, 14, |
| buffer, &sign, &length, &point); |
| CHECK_GE(14, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("4294967272", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| DoubleToAscii(4.1855804968213567e298, DTOA_SHORTEST, 0, |
| buffer, &sign, &length, &point); |
| CHECK_EQ("4185580496821357", buffer.start()); |
| CHECK_EQ(299, point); |
| |
| DoubleToAscii(4.1855804968213567e298, DTOA_PRECISION, 20, |
| buffer, &sign, &length, &point); |
| CHECK_GE(20, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("41855804968213567225", buffer.start()); |
| CHECK_EQ(299, point); |
| |
| DoubleToAscii(5.5626846462680035e-309, DTOA_SHORTEST, 0, |
| buffer, &sign, &length, &point); |
| CHECK_EQ("5562684646268003", buffer.start()); |
| CHECK_EQ(-308, point); |
| |
| DoubleToAscii(5.5626846462680035e-309, DTOA_PRECISION, 1, |
| buffer, &sign, &length, &point); |
| CHECK_GE(1, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("6", buffer.start()); |
| CHECK_EQ(-308, point); |
| |
| DoubleToAscii(-2147483648.0, DTOA_SHORTEST, 0, |
| buffer, &sign, &length, &point); |
| CHECK_EQ(1, sign); |
| CHECK_EQ("2147483648", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| |
| DoubleToAscii(-2147483648.0, DTOA_FIXED, 2, buffer, &sign, &length, &point); |
| CHECK_GE(2, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ(1, sign); |
| CHECK_EQ("2147483648", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| DoubleToAscii(-2147483648.0, DTOA_PRECISION, 5, |
| buffer, &sign, &length, &point); |
| CHECK_GE(5, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ(1, sign); |
| CHECK_EQ("21475", buffer.start()); |
| CHECK_EQ(10, point); |
| |
| DoubleToAscii(-3.5844466002796428e+298, DTOA_SHORTEST, 0, |
| buffer, &sign, &length, &point); |
| CHECK_EQ(1, sign); |
| CHECK_EQ("35844466002796428", buffer.start()); |
| CHECK_EQ(299, point); |
| |
| DoubleToAscii(-3.5844466002796428e+298, DTOA_PRECISION, 10, |
| buffer, &sign, &length, &point); |
| CHECK_EQ(1, sign); |
| CHECK_GE(10, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("35844466", buffer.start()); |
| CHECK_EQ(299, point); |
| |
| uint64_t smallest_normal64 = V8_2PART_UINT64_C(0x00100000, 00000000); |
| double v = Double(smallest_normal64).value(); |
| DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("22250738585072014", buffer.start()); |
| CHECK_EQ(-307, point); |
| |
| DoubleToAscii(v, DTOA_PRECISION, 20, buffer, &sign, &length, &point); |
| CHECK_GE(20, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("22250738585072013831", buffer.start()); |
| CHECK_EQ(-307, point); |
| |
| uint64_t largest_denormal64 = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF); |
| v = Double(largest_denormal64).value(); |
| DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("2225073858507201", buffer.start()); |
| CHECK_EQ(-307, point); |
| |
| DoubleToAscii(v, DTOA_PRECISION, 20, buffer, &sign, &length, &point); |
| CHECK_GE(20, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("2225073858507200889", buffer.start()); |
| CHECK_EQ(-307, point); |
| |
| DoubleToAscii(4128420500802942e-24, DTOA_SHORTEST, 0, |
| buffer, &sign, &length, &point); |
| CHECK_EQ(0, sign); |
| CHECK_EQ("4128420500802942", buffer.start()); |
| CHECK_EQ(-8, point); |
| |
| v = -3.9292015898194142585311918e-10; |
| DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ("39292015898194143", buffer.start()); |
| |
| v = 4194304.0; |
| DoubleToAscii(v, DTOA_FIXED, 5, buffer, &sign, &length, &point); |
| CHECK_GE(5, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ("4194304", buffer.start()); |
| |
| v = 3.3161339052167390562200598e-237; |
| DoubleToAscii(v, DTOA_PRECISION, 19, buffer, &sign, &length, &point); |
| CHECK_GE(19, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ("3316133905216739056", buffer.start()); |
| CHECK_EQ(-236, point); |
| } |
| |
| |
| TEST(DtoaGayShortest) { |
| char buffer_container[kBufferSize]; |
| Vector<char> buffer(buffer_container, kBufferSize); |
| int sign; |
| 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; |
| DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point); |
| CHECK_EQ(0, sign); // All precomputed numbers are positive. |
| CHECK_EQ(current_test.decimal_point, point); |
| CHECK_EQ(current_test.representation, buffer.start()); |
| } |
| } |
| |
| |
| TEST(DtoaGayFixed) { |
| char buffer_container[kBufferSize]; |
| Vector<char> buffer(buffer_container, kBufferSize); |
| int sign; |
| 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; |
| DoubleToAscii(v, DTOA_FIXED, number_digits, buffer, &sign, &length, &point); |
| CHECK_EQ(0, sign); // All precomputed numbers are positive. |
| CHECK_EQ(current_test.decimal_point, point); |
| CHECK_GE(number_digits, length - point); |
| TrimRepresentation(buffer); |
| CHECK_EQ(current_test.representation, buffer.start()); |
| } |
| } |
| |
| |
| TEST(DtoaGayPrecision) { |
| char buffer_container[kBufferSize]; |
| Vector<char> buffer(buffer_container, kBufferSize); |
| int sign; |
| 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; |
| DoubleToAscii(v, DTOA_PRECISION, number_digits, |
| buffer, &sign, &length, &point); |
| CHECK_EQ(0, sign); // All precomputed numbers are positive. |
| CHECK_EQ(current_test.decimal_point, point); |
| CHECK_GE(number_digits, length); |
| TrimRepresentation(buffer); |
| CHECK_EQ(current_test.representation, buffer.start()); |
| } |
| } |
