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v8/test/cctest/test-bignum-dtoa.cc
Dan Elphick 7f5383e8ad [base] Move utils/vector.h to base/vector.h 
The adding of base:: was mostly prepared using git grep and sed:
git grep -l <pattern> | grep -v base/vector.h | \
  xargs sed -i 's/\b<pattern>\b/base::<pattern>/
with lots of manual clean-ups due to the resulting
v8::internal::base::Vectors.

#includes were fixed using:
git grep -l "src/utils/vector.h" | \
  axargs sed -i 's!src/utils/vector.h!src/base/vector.h!'

Bug: v8:11879
Change-Id: I3e6d622987fee4478089c40539724c19735bd625
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2968412
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75243}
2021-06-18 13:33:13 +00:00

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// Copyright 2011 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 "src/init/v8.h"
#include "src/numbers/bignum-dtoa.h"
#include "src/base/platform/platform.h"
#include "src/numbers/double.h"
#include "test/cctest/cctest.h"
#include "test/cctest/gay-fixed.h"
#include "test/cctest/gay-precision.h"
#include "test/cctest/gay-shortest.h"
namespace v8 {
namespace internal {
namespace test_bignum_dtoa {
// Removes trailing '0' digits (modifies {representation}). Can create an empty
// string if all digits are 0.
static void TrimRepresentation(char* representation) {
size_t len = strlen(representation);
while (len > 0 && representation[len - 1] == '0') --len;
representation[len] = '\0';
}
static const int kBufferSize = 100;
TEST(BignumDtoaVariousDoubles) {
char buffer_container[kBufferSize];
base::Vector<char> buffer(buffer_container, kBufferSize);
int length;
int point;
BignumDtoa(1.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("1", buffer.begin()));
CHECK_EQ(1, point);
BignumDtoa(1.0, BIGNUM_DTOA_FIXED, 3, buffer, &length, &point);
CHECK_GE(3, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("1", buffer.begin()));
CHECK_EQ(1, point);
BignumDtoa(1.0, BIGNUM_DTOA_PRECISION, 3, buffer, &length, &point);
CHECK_GE(3, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("1", buffer.begin()));
CHECK_EQ(1, point);
BignumDtoa(1.5, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("15", buffer.begin()));
CHECK_EQ(1, point);
BignumDtoa(1.5, BIGNUM_DTOA_FIXED, 10, buffer, &length, &point);
CHECK_GE(10, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("15", buffer.begin()));
CHECK_EQ(1, point);
BignumDtoa(1.5, BIGNUM_DTOA_PRECISION, 10, buffer, &length, &point);
CHECK_GE(10, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("15", buffer.begin()));
CHECK_EQ(1, point);
double min_double = 5e-324;
BignumDtoa(min_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("5", buffer.begin()));
CHECK_EQ(-323, point);
BignumDtoa(min_double, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
CHECK_GE(5, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("", buffer.begin()));
BignumDtoa(min_double, BIGNUM_DTOA_PRECISION, 5, buffer, &length, &point);
CHECK_GE(5, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("49407", buffer.begin()));
CHECK_EQ(-323, point);
double max_double = 1.7976931348623157e308;
BignumDtoa(max_double, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("17976931348623157", buffer.begin()));
CHECK_EQ(309, point);
BignumDtoa(max_double, BIGNUM_DTOA_PRECISION, 7, buffer, &length, &point);
CHECK_GE(7, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("1797693", buffer.begin()));
CHECK_EQ(309, point);
BignumDtoa(4294967272.0, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("4294967272", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(4294967272.0, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
CHECK_EQ(0, strcmp("429496727200000", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(4294967272.0, BIGNUM_DTOA_PRECISION, 14, buffer, &length, &point);
CHECK_GE(14, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("4294967272", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_SHORTEST, 0,
buffer, &length, &point);
CHECK_EQ(0, strcmp("4185580496821357", buffer.begin()));
CHECK_EQ(299, point);
BignumDtoa(4.1855804968213567e298, BIGNUM_DTOA_PRECISION, 20,
buffer, &length, &point);
CHECK_GE(20, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("41855804968213567225", buffer.begin()));
CHECK_EQ(299, point);
BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_SHORTEST, 0,
buffer, &length, &point);
CHECK_EQ(0, strcmp("5562684646268003", buffer.begin()));
CHECK_EQ(-308, point);
BignumDtoa(5.5626846462680035e-309, BIGNUM_DTOA_PRECISION, 1,
buffer, &length, &point);
CHECK_GE(1, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("6", buffer.begin()));
CHECK_EQ(-308, point);
BignumDtoa(2147483648.0, BIGNUM_DTOA_SHORTEST, 0,
buffer, &length, &point);
CHECK_EQ(0, strcmp("2147483648", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(2147483648.0, BIGNUM_DTOA_FIXED, 2,
buffer, &length, &point);
CHECK_GE(2, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("2147483648", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(2147483648.0, BIGNUM_DTOA_PRECISION, 5,
buffer, &length, &point);
CHECK_GE(5, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("21475", buffer.begin()));
CHECK_EQ(10, point);
BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_SHORTEST, 0,
buffer, &length, &point);
CHECK_EQ(0, strcmp("35844466002796428", buffer.begin()));
CHECK_EQ(299, point);
BignumDtoa(3.5844466002796428e+298, BIGNUM_DTOA_PRECISION, 10,
buffer, &length, &point);
CHECK_GE(10, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("35844466", buffer.begin()));
CHECK_EQ(299, point);
uint64_t smallest_normal64 = 0x0010'0000'0000'0000;
double v = Double(smallest_normal64).value();
BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("22250738585072014", buffer.begin()));
CHECK_EQ(-307, point);
BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
CHECK_GE(20, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("22250738585072013831", buffer.begin()));
CHECK_EQ(-307, point);
uint64_t largest_denormal64 = 0x000F'FFFF'FFFF'FFFF;
v = Double(largest_denormal64).value();
BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("2225073858507201", buffer.begin()));
CHECK_EQ(-307, point);
BignumDtoa(v, BIGNUM_DTOA_PRECISION, 20, buffer, &length, &point);
CHECK_GE(20, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("2225073858507200889", buffer.begin()));
CHECK_EQ(-307, point);
BignumDtoa(4128420500802942e-24, BIGNUM_DTOA_SHORTEST, 0,
buffer, &length, &point);
CHECK_EQ(0, strcmp("4128420500802942", buffer.begin()));
CHECK_EQ(-8, point);
v = 3.9292015898194142585311918e-10;
BignumDtoa(v, BIGNUM_DTOA_SHORTEST, 0, buffer, &length, &point);
CHECK_EQ(0, strcmp("39292015898194143", buffer.begin()));
v = 4194304.0;
BignumDtoa(v, BIGNUM_DTOA_FIXED, 5, buffer, &length, &point);
CHECK_GE(5, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("4194304", buffer.begin()));
v = 3.3161339052167390562200598e-237;
BignumDtoa(v, BIGNUM_DTOA_PRECISION, 19, buffer, &length, &point);
CHECK_GE(19, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("3316133905216739056", buffer.begin()));
CHECK_EQ(-236, point);
v = 7.9885183916008099497815232e+191;
BignumDtoa(v, BIGNUM_DTOA_PRECISION, 4, buffer, &length, &point);
CHECK_GE(4, length);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("7989", buffer.begin()));
CHECK_EQ(192, point);
v = 1.0000000000000012800000000e+17;
BignumDtoa(v, BIGNUM_DTOA_FIXED, 1, buffer, &length, &point);
CHECK_GE(1, length - point);
TrimRepresentation(buffer.begin());
CHECK_EQ(0, strcmp("100000000000000128", buffer.begin()));
CHECK_EQ(18, point);
}
TEST(BignumDtoaGayShortest) {
char buffer_container[kBufferSize];
base::Vector<char> buffer(buffer_container, kBufferSize);
int length;
int point;
base::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(0, strcmp(current_test.representation, buffer.begin()));
}
}
TEST(BignumDtoaGayFixed) {
char buffer_container[kBufferSize];
base::Vector<char> buffer(buffer_container, kBufferSize);
int length;
int point;
base::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.begin());
CHECK_EQ(0, strcmp(current_test.representation, buffer.begin()));
}
}
TEST(BignumDtoaGayPrecision) {
char buffer_container[kBufferSize];
base::Vector<char> buffer(buffer_container, kBufferSize);
int length;
int point;
base::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.begin());
CHECK_EQ(0, strcmp(current_test.representation, buffer.begin()));
}
}
} // namespace test_bignum_dtoa
} // namespace internal
} // namespace v8
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