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v8/test/cctest/test-strtod.cc
bmeurer@chromium.org 5a564648dd Improve reproducibility of test runs. 
Add random seed to run-tests.py, using either a user supplied
value or a random number generated by random.SystemRandom().
This same random seed is passed to all test cases, making sure
that we can easily reproduce test failures that depend on
random numbers (i.e. bugs related to our handwritten ASLR).

Also fix all uses of rand() to make use of our RNG class
instead.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/231443002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20637 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-04-10 07:25:49 +00:00

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// Copyright 2006-2008 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 "bignum.h"
#include "cctest.h"
#include "diy-fp.h"
#include "double.h"
#include "strtod.h"
#include "utils/random-number-generator.h"
using namespace v8::internal;
static Vector<const char> StringToVector(const char* str) {
return Vector<const char>(str, StrLength(str));
}
static double StrtodChar(const char* str, int exponent) {
return Strtod(StringToVector(str), exponent);
}
TEST(Strtod) {
Vector<const char> vector;
vector = StringToVector("0");
CHECK_EQ(0.0, Strtod(vector, 1));
CHECK_EQ(0.0, Strtod(vector, 2));
CHECK_EQ(0.0, Strtod(vector, -2));
CHECK_EQ(0.0, Strtod(vector, -999));
CHECK_EQ(0.0, Strtod(vector, +999));
vector = StringToVector("1");
CHECK_EQ(1.0, Strtod(vector, 0));
CHECK_EQ(10.0, Strtod(vector, 1));
CHECK_EQ(100.0, Strtod(vector, 2));
CHECK_EQ(1e20, Strtod(vector, 20));
CHECK_EQ(1e22, Strtod(vector, 22));
CHECK_EQ(1e23, Strtod(vector, 23));
CHECK_EQ(1e35, Strtod(vector, 35));
CHECK_EQ(1e36, Strtod(vector, 36));
CHECK_EQ(1e37, Strtod(vector, 37));
CHECK_EQ(1e-1, Strtod(vector, -1));
CHECK_EQ(1e-2, Strtod(vector, -2));
CHECK_EQ(1e-5, Strtod(vector, -5));
CHECK_EQ(1e-20, Strtod(vector, -20));
CHECK_EQ(1e-22, Strtod(vector, -22));
CHECK_EQ(1e-23, Strtod(vector, -23));
CHECK_EQ(1e-25, Strtod(vector, -25));
CHECK_EQ(1e-39, Strtod(vector, -39));
vector = StringToVector("2");
CHECK_EQ(2.0, Strtod(vector, 0));
CHECK_EQ(20.0, Strtod(vector, 1));
CHECK_EQ(200.0, Strtod(vector, 2));
CHECK_EQ(2e20, Strtod(vector, 20));
CHECK_EQ(2e22, Strtod(vector, 22));
CHECK_EQ(2e23, Strtod(vector, 23));
CHECK_EQ(2e35, Strtod(vector, 35));
CHECK_EQ(2e36, Strtod(vector, 36));
CHECK_EQ(2e37, Strtod(vector, 37));
CHECK_EQ(2e-1, Strtod(vector, -1));
CHECK_EQ(2e-2, Strtod(vector, -2));
CHECK_EQ(2e-5, Strtod(vector, -5));
CHECK_EQ(2e-20, Strtod(vector, -20));
CHECK_EQ(2e-22, Strtod(vector, -22));
CHECK_EQ(2e-23, Strtod(vector, -23));
CHECK_EQ(2e-25, Strtod(vector, -25));
CHECK_EQ(2e-39, Strtod(vector, -39));
vector = StringToVector("9");
CHECK_EQ(9.0, Strtod(vector, 0));
CHECK_EQ(90.0, Strtod(vector, 1));
CHECK_EQ(900.0, Strtod(vector, 2));
CHECK_EQ(9e20, Strtod(vector, 20));
CHECK_EQ(9e22, Strtod(vector, 22));
CHECK_EQ(9e23, Strtod(vector, 23));
CHECK_EQ(9e35, Strtod(vector, 35));
CHECK_EQ(9e36, Strtod(vector, 36));
CHECK_EQ(9e37, Strtod(vector, 37));
CHECK_EQ(9e-1, Strtod(vector, -1));
CHECK_EQ(9e-2, Strtod(vector, -2));
CHECK_EQ(9e-5, Strtod(vector, -5));
CHECK_EQ(9e-20, Strtod(vector, -20));
CHECK_EQ(9e-22, Strtod(vector, -22));
CHECK_EQ(9e-23, Strtod(vector, -23));
CHECK_EQ(9e-25, Strtod(vector, -25));
CHECK_EQ(9e-39, Strtod(vector, -39));
vector = StringToVector("12345");
CHECK_EQ(12345.0, Strtod(vector, 0));
CHECK_EQ(123450.0, Strtod(vector, 1));
CHECK_EQ(1234500.0, Strtod(vector, 2));
CHECK_EQ(12345e20, Strtod(vector, 20));
CHECK_EQ(12345e22, Strtod(vector, 22));
CHECK_EQ(12345e23, Strtod(vector, 23));
CHECK_EQ(12345e30, Strtod(vector, 30));
CHECK_EQ(12345e31, Strtod(vector, 31));
CHECK_EQ(12345e32, Strtod(vector, 32));
CHECK_EQ(12345e35, Strtod(vector, 35));
CHECK_EQ(12345e36, Strtod(vector, 36));
CHECK_EQ(12345e37, Strtod(vector, 37));
CHECK_EQ(12345e-1, Strtod(vector, -1));
CHECK_EQ(12345e-2, Strtod(vector, -2));
CHECK_EQ(12345e-5, Strtod(vector, -5));
CHECK_EQ(12345e-20, Strtod(vector, -20));
CHECK_EQ(12345e-22, Strtod(vector, -22));
CHECK_EQ(12345e-23, Strtod(vector, -23));
CHECK_EQ(12345e-25, Strtod(vector, -25));
CHECK_EQ(12345e-39, Strtod(vector, -39));
vector = StringToVector("12345678901234");
CHECK_EQ(12345678901234.0, Strtod(vector, 0));
CHECK_EQ(123456789012340.0, Strtod(vector, 1));
CHECK_EQ(1234567890123400.0, Strtod(vector, 2));
CHECK_EQ(12345678901234e20, Strtod(vector, 20));
CHECK_EQ(12345678901234e22, Strtod(vector, 22));
CHECK_EQ(12345678901234e23, Strtod(vector, 23));
CHECK_EQ(12345678901234e30, Strtod(vector, 30));
CHECK_EQ(12345678901234e31, Strtod(vector, 31));
CHECK_EQ(12345678901234e32, Strtod(vector, 32));
CHECK_EQ(12345678901234e35, Strtod(vector, 35));
CHECK_EQ(12345678901234e36, Strtod(vector, 36));
CHECK_EQ(12345678901234e37, Strtod(vector, 37));
CHECK_EQ(12345678901234e-1, Strtod(vector, -1));
CHECK_EQ(12345678901234e-2, Strtod(vector, -2));
CHECK_EQ(12345678901234e-5, Strtod(vector, -5));
CHECK_EQ(12345678901234e-20, Strtod(vector, -20));
CHECK_EQ(12345678901234e-22, Strtod(vector, -22));
CHECK_EQ(12345678901234e-23, Strtod(vector, -23));
CHECK_EQ(12345678901234e-25, Strtod(vector, -25));
CHECK_EQ(12345678901234e-39, Strtod(vector, -39));
vector = StringToVector("123456789012345");
CHECK_EQ(123456789012345.0, Strtod(vector, 0));
CHECK_EQ(1234567890123450.0, Strtod(vector, 1));
CHECK_EQ(12345678901234500.0, Strtod(vector, 2));
CHECK_EQ(123456789012345e20, Strtod(vector, 20));
CHECK_EQ(123456789012345e22, Strtod(vector, 22));
CHECK_EQ(123456789012345e23, Strtod(vector, 23));
CHECK_EQ(123456789012345e35, Strtod(vector, 35));
CHECK_EQ(123456789012345e36, Strtod(vector, 36));
CHECK_EQ(123456789012345e37, Strtod(vector, 37));
CHECK_EQ(123456789012345e39, Strtod(vector, 39));
CHECK_EQ(123456789012345e-1, Strtod(vector, -1));
CHECK_EQ(123456789012345e-2, Strtod(vector, -2));
CHECK_EQ(123456789012345e-5, Strtod(vector, -5));
CHECK_EQ(123456789012345e-20, Strtod(vector, -20));
CHECK_EQ(123456789012345e-22, Strtod(vector, -22));
CHECK_EQ(123456789012345e-23, Strtod(vector, -23));
CHECK_EQ(123456789012345e-25, Strtod(vector, -25));
CHECK_EQ(123456789012345e-39, Strtod(vector, -39));
CHECK_EQ(0.0, StrtodChar("0", 12345));
CHECK_EQ(0.0, StrtodChar("", 1324));
CHECK_EQ(0.0, StrtodChar("000000000", 123));
CHECK_EQ(0.0, StrtodChar("2", -324));
CHECK_EQ(4e-324, StrtodChar("3", -324));
// It would be more readable to put non-zero literals on the left side (i.e.
// CHECK_EQ(1e-325, StrtodChar("1", -325))), but then Gcc complains that
// they are truncated to zero.
CHECK_EQ(0.0, StrtodChar("1", -325));
CHECK_EQ(0.0, StrtodChar("1", -325));
CHECK_EQ(0.0, StrtodChar("20000", -328));
CHECK_EQ(40000e-328, StrtodChar("30000", -328));
CHECK_EQ(0.0, StrtodChar("10000", -329));
CHECK_EQ(0.0, StrtodChar("90000", -329));
CHECK_EQ(0.0, StrtodChar("000000001", -325));
CHECK_EQ(0.0, StrtodChar("000000001", -325));
CHECK_EQ(0.0, StrtodChar("0000000020000", -328));
CHECK_EQ(40000e-328, StrtodChar("00000030000", -328));
CHECK_EQ(0.0, StrtodChar("0000000010000", -329));
CHECK_EQ(0.0, StrtodChar("0000000090000", -329));
// It would be more readable to put the literals (and not V8_INFINITY) on the
// left side (i.e. CHECK_EQ(1e309, StrtodChar("1", 309))), but then Gcc
// complains that the floating constant exceeds range of 'double'.
CHECK_EQ(V8_INFINITY, StrtodChar("1", 309));
CHECK_EQ(1e308, StrtodChar("1", 308));
CHECK_EQ(1234e305, StrtodChar("1234", 305));
CHECK_EQ(1234e304, StrtodChar("1234", 304));
CHECK_EQ(V8_INFINITY, StrtodChar("18", 307));
CHECK_EQ(17e307, StrtodChar("17", 307));
CHECK_EQ(V8_INFINITY, StrtodChar("0000001", 309));
CHECK_EQ(1e308, StrtodChar("00000001", 308));
CHECK_EQ(1234e305, StrtodChar("00000001234", 305));
CHECK_EQ(1234e304, StrtodChar("000000001234", 304));
CHECK_EQ(V8_INFINITY, StrtodChar("0000000018", 307));
CHECK_EQ(17e307, StrtodChar("0000000017", 307));
CHECK_EQ(V8_INFINITY, StrtodChar("1000000", 303));
CHECK_EQ(1e308, StrtodChar("100000", 303));
CHECK_EQ(1234e305, StrtodChar("123400000", 300));
CHECK_EQ(1234e304, StrtodChar("123400000", 299));
CHECK_EQ(V8_INFINITY, StrtodChar("180000000", 300));
CHECK_EQ(17e307, StrtodChar("170000000", 300));
CHECK_EQ(V8_INFINITY, StrtodChar("00000001000000", 303));
CHECK_EQ(1e308, StrtodChar("000000000000100000", 303));
CHECK_EQ(1234e305, StrtodChar("00000000123400000", 300));
CHECK_EQ(1234e304, StrtodChar("0000000123400000", 299));
CHECK_EQ(V8_INFINITY, StrtodChar("00000000180000000", 300));
CHECK_EQ(17e307, StrtodChar("00000000170000000", 300));
CHECK_EQ(1.7976931348623157E+308, StrtodChar("17976931348623157", 292));
CHECK_EQ(1.7976931348623158E+308, StrtodChar("17976931348623158", 292));
CHECK_EQ(V8_INFINITY, StrtodChar("17976931348623159", 292));
// The following number is the result of 89255.0/1e22. Both floating-point
// numbers can be accurately represented with doubles. However on Linux,x86
// the floating-point stack is set to 80bits and the double-rounding
// introduces an error.
CHECK_EQ(89255e-22, StrtodChar("89255", -22));
// Some random values.
CHECK_EQ(358416272e-33, StrtodChar("358416272", -33));
CHECK_EQ(104110013277974872254e-225,
StrtodChar("104110013277974872254", -225));
CHECK_EQ(123456789e108, StrtodChar("123456789", 108));
CHECK_EQ(123456789e109, StrtodChar("123456789", 109));
CHECK_EQ(123456789e110, StrtodChar("123456789", 110));
CHECK_EQ(123456789e111, StrtodChar("123456789", 111));
CHECK_EQ(123456789e112, StrtodChar("123456789", 112));
CHECK_EQ(123456789e113, StrtodChar("123456789", 113));
CHECK_EQ(123456789e114, StrtodChar("123456789", 114));
CHECK_EQ(123456789e115, StrtodChar("123456789", 115));
CHECK_EQ(1234567890123456789012345e108,
StrtodChar("1234567890123456789012345", 108));
CHECK_EQ(1234567890123456789012345e109,
StrtodChar("1234567890123456789012345", 109));
CHECK_EQ(1234567890123456789012345e110,
StrtodChar("1234567890123456789012345", 110));
CHECK_EQ(1234567890123456789012345e111,
StrtodChar("1234567890123456789012345", 111));
CHECK_EQ(1234567890123456789012345e112,
StrtodChar("1234567890123456789012345", 112));
CHECK_EQ(1234567890123456789012345e113,
StrtodChar("1234567890123456789012345", 113));
CHECK_EQ(1234567890123456789012345e114,
StrtodChar("1234567890123456789012345", 114));
CHECK_EQ(1234567890123456789012345e115,
StrtodChar("1234567890123456789012345", 115));
CHECK_EQ(1234567890123456789052345e108,
StrtodChar("1234567890123456789052345", 108));
CHECK_EQ(1234567890123456789052345e109,
StrtodChar("1234567890123456789052345", 109));
CHECK_EQ(1234567890123456789052345e110,
StrtodChar("1234567890123456789052345", 110));
CHECK_EQ(1234567890123456789052345e111,
StrtodChar("1234567890123456789052345", 111));
CHECK_EQ(1234567890123456789052345e112,
StrtodChar("1234567890123456789052345", 112));
CHECK_EQ(1234567890123456789052345e113,
StrtodChar("1234567890123456789052345", 113));
CHECK_EQ(1234567890123456789052345e114,
StrtodChar("1234567890123456789052345", 114));
CHECK_EQ(1234567890123456789052345e115,
StrtodChar("1234567890123456789052345", 115));
CHECK_EQ(5.445618932859895e-255,
StrtodChar("5445618932859895362967233318697132813618813095743952975"
"4392982234069699615600475529427176366709107287468930197"
"8628345413991790019316974825934906752493984055268219809"
"5012176093045431437495773903922425632551857520884625114"
"6241265881735209066709685420744388526014389929047617597"
"0302268848374508109029268898695825171158085457567481507"
"4162979705098246243690189880319928315307816832576838178"
"2563074014542859888710209237525873301724479666744537857"
"9026553346649664045621387124193095870305991178772256504"
"4368663670643970181259143319016472430928902201239474588"
"1392338901353291306607057623202353588698746085415097902"
"6640064319118728664842287477491068264828851624402189317"
"2769161449825765517353755844373640588822904791244190695"
"2998382932630754670573838138825217065450843010498555058"
"88186560731", -1035));
// Boundary cases. Boundaries themselves should round to even.
//
// 0x1FFFFFFFFFFFF * 2^3 = 72057594037927928
// next: 72057594037927936
// boundary: 72057594037927932 should round up.
CHECK_EQ(72057594037927928.0, StrtodChar("72057594037927928", 0));
CHECK_EQ(72057594037927936.0, StrtodChar("72057594037927936", 0));
CHECK_EQ(72057594037927936.0, StrtodChar("72057594037927932", 0));
CHECK_EQ(72057594037927928.0, StrtodChar("7205759403792793199999", -5));
CHECK_EQ(72057594037927936.0, StrtodChar("7205759403792793200001", -5));
// 0x1FFFFFFFFFFFF * 2^10 = 9223372036854774784
// next: 9223372036854775808
// boundary: 9223372036854775296 should round up.
CHECK_EQ(9223372036854774784.0, StrtodChar("9223372036854774784", 0));
CHECK_EQ(9223372036854775808.0, StrtodChar("9223372036854775808", 0));
CHECK_EQ(9223372036854775808.0, StrtodChar("9223372036854775296", 0));
CHECK_EQ(9223372036854774784.0, StrtodChar("922337203685477529599999", -5));
CHECK_EQ(9223372036854775808.0, StrtodChar("922337203685477529600001", -5));
// 0x1FFFFFFFFFFFF * 2^50 = 10141204801825834086073718800384
// next: 10141204801825835211973625643008
// boundary: 10141204801825834649023672221696 should round up.
CHECK_EQ(10141204801825834086073718800384.0,
StrtodChar("10141204801825834086073718800384", 0));
CHECK_EQ(10141204801825835211973625643008.0,
StrtodChar("10141204801825835211973625643008", 0));
CHECK_EQ(10141204801825835211973625643008.0,
StrtodChar("10141204801825834649023672221696", 0));
CHECK_EQ(10141204801825834086073718800384.0,
StrtodChar("1014120480182583464902367222169599999", -5));
CHECK_EQ(10141204801825835211973625643008.0,
StrtodChar("1014120480182583464902367222169600001", -5));
// 0x1FFFFFFFFFFFF * 2^99 = 5708990770823838890407843763683279797179383808
// next: 5708990770823839524233143877797980545530986496
// boundary: 5708990770823839207320493820740630171355185152
// The boundary should round up.
CHECK_EQ(5708990770823838890407843763683279797179383808.0,
StrtodChar("5708990770823838890407843763683279797179383808", 0));
CHECK_EQ(5708990770823839524233143877797980545530986496.0,
StrtodChar("5708990770823839524233143877797980545530986496", 0));
CHECK_EQ(5708990770823839524233143877797980545530986496.0,
StrtodChar("5708990770823839207320493820740630171355185152", 0));
CHECK_EQ(5708990770823838890407843763683279797179383808.0,
StrtodChar("5708990770823839207320493820740630171355185151999", -3));
CHECK_EQ(5708990770823839524233143877797980545530986496.0,
StrtodChar("5708990770823839207320493820740630171355185152001", -3));
// The following test-cases got some public attention in early 2011 when they
// sent Java and PHP into an infinite loop.
CHECK_EQ(2.225073858507201e-308, StrtodChar("22250738585072011", -324));
CHECK_EQ(2.22507385850720138309e-308,
StrtodChar("22250738585072011360574097967091319759348195463516456480"
"23426109724822222021076945516529523908135087914149158913"
"03962110687008643869459464552765720740782062174337998814"
"10632673292535522868813721490129811224514518898490572223"
"07285255133155755015914397476397983411801999323962548289"
"01710708185069063066665599493827577257201576306269066333"
"26475653000092458883164330377797918696120494973903778297"
"04905051080609940730262937128958950003583799967207254304"
"36028407889577179615094551674824347103070260914462157228"
"98802581825451803257070188608721131280795122334262883686"
"22321503775666622503982534335974568884423900265498198385"
"48794829220689472168983109969836584681402285424333066033"
"98508864458040010349339704275671864433837704860378616227"
"71738545623065874679014086723327636718751", -1076));
}
static int CompareBignumToDiyFp(const Bignum& bignum_digits,
int bignum_exponent,
DiyFp diy_fp) {
Bignum bignum;
bignum.AssignBignum(bignum_digits);
Bignum other;
other.AssignUInt64(diy_fp.f());
if (bignum_exponent >= 0) {
bignum.MultiplyByPowerOfTen(bignum_exponent);
} else {
other.MultiplyByPowerOfTen(-bignum_exponent);
}
if (diy_fp.e() >= 0) {
other.ShiftLeft(diy_fp.e());
} else {
bignum.ShiftLeft(-diy_fp.e());
}
return Bignum::Compare(bignum, other);
}
static bool CheckDouble(Vector<const char> buffer,
int exponent,
double to_check) {
DiyFp lower_boundary;
DiyFp upper_boundary;
Bignum input_digits;
input_digits.AssignDecimalString(buffer);
if (to_check == 0.0) {
const double kMinDouble = 4e-324;
// Check that the buffer*10^exponent < (0 + kMinDouble)/2.
Double d(kMinDouble);
d.NormalizedBoundaries(&lower_boundary, &upper_boundary);
return CompareBignumToDiyFp(input_digits, exponent, lower_boundary) <= 0;
}
if (to_check == V8_INFINITY) {
const double kMaxDouble = 1.7976931348623157e308;
// Check that the buffer*10^exponent >= boundary between kMaxDouble and inf.
Double d(kMaxDouble);
d.NormalizedBoundaries(&lower_boundary, &upper_boundary);
return CompareBignumToDiyFp(input_digits, exponent, upper_boundary) >= 0;
}
Double d(to_check);
d.NormalizedBoundaries(&lower_boundary, &upper_boundary);
if ((d.Significand() & 1) == 0) {
return CompareBignumToDiyFp(input_digits, exponent, lower_boundary) >= 0 &&
CompareBignumToDiyFp(input_digits, exponent, upper_boundary) <= 0;
} else {
return CompareBignumToDiyFp(input_digits, exponent, lower_boundary) > 0 &&
CompareBignumToDiyFp(input_digits, exponent, upper_boundary) < 0;
}
}
// Copied from v8.cc and adapted to make the function deterministic.
static uint32_t DeterministicRandom() {
// Random number generator using George Marsaglia's MWC algorithm.
static uint32_t hi = 0;
static uint32_t lo = 0;
// Initialization values don't have any special meaning. (They are the result
// of two calls to rand().)
if (hi == 0) hi = 0xbfe166e7;
if (lo == 0) lo = 0x64d1c3c9;
// Mix the bits.
hi = 36969 * (hi & 0xFFFF) + (hi >> 16);
lo = 18273 * (lo & 0xFFFF) + (lo >> 16);
return (hi << 16) + (lo & 0xFFFF);
}
static const int kBufferSize = 1024;
static const int kShortStrtodRandomCount = 2;
static const int kLargeStrtodRandomCount = 2;
TEST(RandomStrtod) {
RandomNumberGenerator rng;
char buffer[kBufferSize];
for (int length = 1; length < 15; length++) {
for (int i = 0; i < kShortStrtodRandomCount; ++i) {
int pos = 0;
for (int j = 0; j < length; ++j) {
buffer[pos++] = rng.NextInt(10) + '0';
}
int exponent = DeterministicRandom() % (25*2 + 1) - 25 - length;
buffer[pos] = '\0';
Vector<const char> vector(buffer, pos);
double strtod_result = Strtod(vector, exponent);
CHECK(CheckDouble(vector, exponent, strtod_result));
}
}
for (int length = 15; length < 800; length += 2) {
for (int i = 0; i < kLargeStrtodRandomCount; ++i) {
int pos = 0;
for (int j = 0; j < length; ++j) {
buffer[pos++] = rng.NextInt(10) + '0';
}
int exponent = DeterministicRandom() % (308*2 + 1) - 308 - length;
buffer[pos] = '\0';
Vector<const char> vector(buffer, pos);
double strtod_result = Strtod(vector, exponent);
CHECK(CheckDouble(vector, exponent, strtod_result));
}
}
}
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