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331 lines
11 KiB
331 lines
11 KiB
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include "src/v8.h"
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#include "src/dtoa.h"
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#include "src/base/platform/platform.h"
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#include "src/double.h"
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#include "test/cctest/cctest.h"
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#include "test/cctest/gay-fixed.h"
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#include "test/cctest/gay-precision.h"
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#include "test/cctest/gay-shortest.h"
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using namespace v8::internal;
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// Removes trailing '0' digits.
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static void TrimRepresentation(Vector<char> representation) {
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int len = StrLength(representation.start());
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int i;
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for (i = len - 1; i >= 0; --i) {
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if (representation[i] != '0') break;
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}
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representation[i + 1] = '\0';
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}
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static const int kBufferSize = 100;
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TEST(DtoaVariousDoubles) {
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char buffer_container[kBufferSize];
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Vector<char> buffer(buffer_container, kBufferSize);
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int length;
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int point;
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int sign;
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DoubleToAscii(0.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("0", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(0.0, DTOA_FIXED, 2, buffer, &sign, &length, &point);
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CHECK_EQ(1, length);
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CHECK_EQ(0, strcmp("0", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(0.0, DTOA_PRECISION, 3, buffer, &sign, &length, &point);
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CHECK_EQ(1, length);
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CHECK_EQ(0, strcmp("0", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("1", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.0, DTOA_FIXED, 3, buffer, &sign, &length, &point);
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CHECK_GE(3, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("1", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.0, DTOA_PRECISION, 3, buffer, &sign, &length, &point);
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CHECK_GE(3, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("1", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.5, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("15", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.5, DTOA_FIXED, 10, buffer, &sign, &length, &point);
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CHECK_GE(10, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("15", buffer.start()));
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CHECK_EQ(1, point);
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DoubleToAscii(1.5, DTOA_PRECISION, 10, buffer, &sign, &length, &point);
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CHECK_GE(10, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("15", buffer.start()));
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CHECK_EQ(1, point);
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double min_double = 5e-324;
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DoubleToAscii(min_double, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("5", buffer.start()));
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CHECK_EQ(-323, point);
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DoubleToAscii(min_double, DTOA_FIXED, 5, buffer, &sign, &length, &point);
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CHECK_GE(5, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("", buffer.start()));
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CHECK_GE(-5, point);
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DoubleToAscii(min_double, DTOA_PRECISION, 5, buffer, &sign, &length, &point);
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CHECK_GE(5, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("49407", buffer.start()));
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CHECK_EQ(-323, point);
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double max_double = 1.7976931348623157e308;
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DoubleToAscii(max_double, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("17976931348623157", buffer.start()));
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CHECK_EQ(309, point);
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DoubleToAscii(max_double, DTOA_PRECISION, 7, buffer, &sign, &length, &point);
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CHECK_GE(7, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("1797693", buffer.start()));
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CHECK_EQ(309, point);
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DoubleToAscii(4294967272.0, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("4294967272", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(4294967272.0, DTOA_FIXED, 5, buffer, &sign, &length, &point);
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CHECK_GE(5, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("4294967272", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(4294967272.0, DTOA_PRECISION, 14,
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buffer, &sign, &length, &point);
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CHECK_GE(14, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("4294967272", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(4.1855804968213567e298, DTOA_SHORTEST, 0,
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buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("4185580496821357", buffer.start()));
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CHECK_EQ(299, point);
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DoubleToAscii(4.1855804968213567e298, DTOA_PRECISION, 20,
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buffer, &sign, &length, &point);
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CHECK_GE(20, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("41855804968213567225", buffer.start()));
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CHECK_EQ(299, point);
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DoubleToAscii(5.5626846462680035e-309, DTOA_SHORTEST, 0,
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buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("5562684646268003", buffer.start()));
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CHECK_EQ(-308, point);
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DoubleToAscii(5.5626846462680035e-309, DTOA_PRECISION, 1,
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buffer, &sign, &length, &point);
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CHECK_GE(1, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("6", buffer.start()));
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CHECK_EQ(-308, point);
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DoubleToAscii(-2147483648.0, DTOA_SHORTEST, 0,
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buffer, &sign, &length, &point);
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CHECK_EQ(1, sign);
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CHECK_EQ(0, strcmp("2147483648", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(-2147483648.0, DTOA_FIXED, 2, buffer, &sign, &length, &point);
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CHECK_GE(2, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(1, sign);
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CHECK_EQ(0, strcmp("2147483648", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(-2147483648.0, DTOA_PRECISION, 5,
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buffer, &sign, &length, &point);
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CHECK_GE(5, length);
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TrimRepresentation(buffer);
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CHECK_EQ(1, sign);
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CHECK_EQ(0, strcmp("21475", buffer.start()));
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CHECK_EQ(10, point);
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DoubleToAscii(-3.5844466002796428e+298, DTOA_SHORTEST, 0,
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buffer, &sign, &length, &point);
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CHECK_EQ(1, sign);
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CHECK_EQ(0, strcmp("35844466002796428", buffer.start()));
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CHECK_EQ(299, point);
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DoubleToAscii(-3.5844466002796428e+298, DTOA_PRECISION, 10,
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buffer, &sign, &length, &point);
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CHECK_EQ(1, sign);
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CHECK_GE(10, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("35844466", buffer.start()));
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CHECK_EQ(299, point);
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uint64_t smallest_normal64 = V8_2PART_UINT64_C(0x00100000, 00000000);
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double v = Double(smallest_normal64).value();
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DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("22250738585072014", buffer.start()));
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CHECK_EQ(-307, point);
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DoubleToAscii(v, DTOA_PRECISION, 20, buffer, &sign, &length, &point);
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CHECK_GE(20, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("22250738585072013831", buffer.start()));
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CHECK_EQ(-307, point);
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uint64_t largest_denormal64 = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF);
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v = Double(largest_denormal64).value();
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DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("2225073858507201", buffer.start()));
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CHECK_EQ(-307, point);
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DoubleToAscii(v, DTOA_PRECISION, 20, buffer, &sign, &length, &point);
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CHECK_GE(20, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("2225073858507200889", buffer.start()));
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CHECK_EQ(-307, point);
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DoubleToAscii(4128420500802942e-24, DTOA_SHORTEST, 0,
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buffer, &sign, &length, &point);
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CHECK_EQ(0, sign);
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CHECK_EQ(0, strcmp("4128420500802942", buffer.start()));
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CHECK_EQ(-8, point);
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v = -3.9292015898194142585311918e-10;
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DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, strcmp("39292015898194143", buffer.start()));
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v = 4194304.0;
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DoubleToAscii(v, DTOA_FIXED, 5, buffer, &sign, &length, &point);
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CHECK_GE(5, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("4194304", buffer.start()));
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v = 3.3161339052167390562200598e-237;
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DoubleToAscii(v, DTOA_PRECISION, 19, buffer, &sign, &length, &point);
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CHECK_GE(19, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp("3316133905216739056", buffer.start()));
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CHECK_EQ(-236, point);
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}
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TEST(DtoaGayShortest) {
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char buffer_container[kBufferSize];
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Vector<char> buffer(buffer_container, kBufferSize);
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int sign;
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int length;
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int point;
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Vector<const PrecomputedShortest> precomputed =
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PrecomputedShortestRepresentations();
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for (int i = 0; i < precomputed.length(); ++i) {
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const PrecomputedShortest current_test = precomputed[i];
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double v = current_test.v;
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DoubleToAscii(v, DTOA_SHORTEST, 0, buffer, &sign, &length, &point);
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CHECK_EQ(0, sign); // All precomputed numbers are positive.
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CHECK_EQ(current_test.decimal_point, point);
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CHECK_EQ(0, strcmp(current_test.representation, buffer.start()));
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}
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}
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TEST(DtoaGayFixed) {
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char buffer_container[kBufferSize];
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Vector<char> buffer(buffer_container, kBufferSize);
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int sign;
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int length;
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int point;
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Vector<const PrecomputedFixed> precomputed =
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PrecomputedFixedRepresentations();
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for (int i = 0; i < precomputed.length(); ++i) {
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const PrecomputedFixed current_test = precomputed[i];
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double v = current_test.v;
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int number_digits = current_test.number_digits;
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DoubleToAscii(v, DTOA_FIXED, number_digits, buffer, &sign, &length, &point);
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CHECK_EQ(0, sign); // All precomputed numbers are positive.
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CHECK_EQ(current_test.decimal_point, point);
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CHECK_GE(number_digits, length - point);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp(current_test.representation, buffer.start()));
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}
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}
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TEST(DtoaGayPrecision) {
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char buffer_container[kBufferSize];
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Vector<char> buffer(buffer_container, kBufferSize);
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int sign;
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int length;
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int point;
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Vector<const PrecomputedPrecision> precomputed =
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PrecomputedPrecisionRepresentations();
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for (int i = 0; i < precomputed.length(); ++i) {
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const PrecomputedPrecision current_test = precomputed[i];
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double v = current_test.v;
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int number_digits = current_test.number_digits;
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DoubleToAscii(v, DTOA_PRECISION, number_digits,
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buffer, &sign, &length, &point);
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CHECK_EQ(0, sign); // All precomputed numbers are positive.
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CHECK_EQ(current_test.decimal_point, point);
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CHECK_GE(number_digits, length);
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TrimRepresentation(buffer);
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CHECK_EQ(0, strcmp(current_test.representation, buffer.start()));
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}
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}
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