test-conversions.cc 16.8 KB
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// Copyright 2011 the V8 project authors. All rights reserved.
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// 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.
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// TODO(jochen): Remove this after the setting is turned on globally.
#define V8_IMMINENT_DEPRECATION_WARNINGS

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#include <stdlib.h>

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#include "src/v8.h"
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#include "src/base/platform/platform.h"
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#include "test/cctest/cctest.h"
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using namespace v8::internal;


TEST(Hex) {
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  UnicodeCache uc;
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  CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(255.0, StringToDouble(&uc, "0xff",
                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(175.0, StringToDouble(&uc, "0xAF",
                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
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  CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX));
  CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX));
  CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX));
  CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX));
  CHECK_EQ(255.0, StringToDouble(&uc, "0xff", ALLOW_HEX));
  CHECK_EQ(175.0, StringToDouble(&uc, "0xAF", ALLOW_HEX));
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}


TEST(Octal) {
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  UnicodeCache uc;
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  CHECK_EQ(0.0, StringToDouble(&uc, "0o0", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0O0", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(1.0, StringToDouble(&uc, "0o1", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(7.0, StringToDouble(&uc, "0o7", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(8.0, StringToDouble(&uc, "0o10",
                               ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(63.0, StringToDouble(&uc, "0o77",
                                ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));

  CHECK_EQ(0.0, StringToDouble(&uc, "0o0", ALLOW_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0O0", ALLOW_OCTAL));
  CHECK_EQ(1.0, StringToDouble(&uc, "0o1", ALLOW_OCTAL));
  CHECK_EQ(7.0, StringToDouble(&uc, "0o7", ALLOW_OCTAL));
  CHECK_EQ(8.0, StringToDouble(&uc, "0o10", ALLOW_OCTAL));
  CHECK_EQ(63.0, StringToDouble(&uc, "0o77", ALLOW_OCTAL));
}


TEST(ImplicitOctal) {
  UnicodeCache uc;
  CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(8.0, StringToDouble(&uc, "010", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(63.0, StringToDouble(&uc, "077", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
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  CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX));
  CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX));
  CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX));
  CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX));
  CHECK_EQ(10.0, StringToDouble(&uc, "010", ALLOW_HEX));
  CHECK_EQ(77.0, StringToDouble(&uc, "077", ALLOW_HEX));
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  const double x = 010000000000;  // Power of 2, no rounding errors.
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  CHECK_EQ(x * x * x * x * x, StringToDouble(&uc, "01" "0000000000" "0000000000"
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      "0000000000" "0000000000" "0000000000", ALLOW_IMPLICIT_OCTAL));
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}


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TEST(Binary) {
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  UnicodeCache uc;
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  CHECK_EQ(0.0, StringToDouble(&uc, "0b0",
                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0B0",
                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(1.0, StringToDouble(&uc, "0b1",
                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(2.0, StringToDouble(&uc, "0b10",
                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(3.0, StringToDouble(&uc, "0b11",
                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));

  CHECK_EQ(0.0, StringToDouble(&uc, "0b0", ALLOW_BINARY));
  CHECK_EQ(0.0, StringToDouble(&uc, "0B0", ALLOW_BINARY));
  CHECK_EQ(1.0, StringToDouble(&uc, "0b1", ALLOW_BINARY));
  CHECK_EQ(2.0, StringToDouble(&uc, "0b10", ALLOW_BINARY));
  CHECK_EQ(3.0, StringToDouble(&uc, "0b11", ALLOW_BINARY));
}
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TEST(MalformedOctal) {
  UnicodeCache uc;
  CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));

  CHECK(std::isnan(StringToDouble(&uc, "07.7",
                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
  CHECK(std::isnan(StringToDouble(&uc, "07.8",
                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
  CHECK(std::isnan(StringToDouble(&uc, "07e8",
                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
  CHECK(std::isnan(StringToDouble(&uc, "07e7",
                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));

  CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));

  CHECK_EQ(0.001, StringToDouble(&uc, "0.001",
                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.713, StringToDouble(&uc, "0.713",
                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
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  CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX));
  CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX));
  CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX));
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  CHECK_EQ(7.7, StringToDouble(&uc, "07.7", ALLOW_HEX));
  CHECK_EQ(7.8, StringToDouble(&uc, "07.8", ALLOW_HEX));
  CHECK_EQ(7e8, StringToDouble(&uc, "07e8", ALLOW_HEX));
  CHECK_EQ(7e7, StringToDouble(&uc, "07e7", ALLOW_HEX));
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  CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX));
  CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX));
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  CHECK_EQ(0.001, StringToDouble(&uc, "0.001", ALLOW_HEX));
  CHECK_EQ(0.713, StringToDouble(&uc, "0.713", ALLOW_HEX));
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}


TEST(TrailingJunk) {
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  UnicodeCache uc;
  CHECK_EQ(8.0, StringToDouble(&uc, "8q", ALLOW_TRAILING_JUNK));
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  CHECK_EQ(63.0, StringToDouble(&uc, "077qqq",
                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
  CHECK_EQ(10.0, StringToDouble(&uc, "10e",
                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
  CHECK_EQ(10.0, StringToDouble(&uc, "10e-",
                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
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}


TEST(NonStrDecimalLiteral) {
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  UnicodeCache uc;
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  CHECK(std::isnan(StringToDouble(&uc, " ", NO_FLAGS,
                                  std::numeric_limits<double>::quiet_NaN())));
  CHECK(std::isnan(StringToDouble(&uc, "", NO_FLAGS,
                                  std::numeric_limits<double>::quiet_NaN())));
  CHECK(std::isnan(StringToDouble(&uc, " ", NO_FLAGS,
                                  std::numeric_limits<double>::quiet_NaN())));
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  CHECK_EQ(0.0, StringToDouble(&uc, "", NO_FLAGS));
  CHECK_EQ(0.0, StringToDouble(&uc, " ", NO_FLAGS));
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}

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TEST(IntegerStrLiteral) {
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  UnicodeCache uc;
  CHECK_EQ(0.0, StringToDouble(&uc, "0.0", NO_FLAGS));
  CHECK_EQ(0.0, StringToDouble(&uc, "0", NO_FLAGS));
  CHECK_EQ(0.0, StringToDouble(&uc, "00", NO_FLAGS));
  CHECK_EQ(0.0, StringToDouble(&uc, "000", NO_FLAGS));
  CHECK_EQ(1.0, StringToDouble(&uc, "1", NO_FLAGS));
  CHECK_EQ(-1.0, StringToDouble(&uc, "-1", NO_FLAGS));
  CHECK_EQ(-1.0, StringToDouble(&uc, "  -1  ", NO_FLAGS));
  CHECK_EQ(1.0, StringToDouble(&uc, "  +1  ", NO_FLAGS));
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  CHECK(std::isnan(StringToDouble(&uc, "  -  1  ", NO_FLAGS)));
  CHECK(std::isnan(StringToDouble(&uc, "  +  1  ", NO_FLAGS)));
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  CHECK_EQ(0.0, StringToDouble(&uc, "0e0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0e1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0e-1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0e-100000",
                               ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0e+100000",
                               ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
  CHECK_EQ(0.0, StringToDouble(&uc, "0.", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
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}

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TEST(LongNumberStr) {
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  UnicodeCache uc;
  CHECK_EQ(1e10, StringToDouble(&uc, "1" "0000000000", NO_FLAGS));
  CHECK_EQ(1e20, StringToDouble(&uc, "1" "0000000000" "0000000000", NO_FLAGS));
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  CHECK_EQ(1e60, StringToDouble(&uc, "1" "0000000000" "0000000000" "0000000000"
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      "0000000000" "0000000000" "0000000000", NO_FLAGS));

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  CHECK_EQ(1e-2, StringToDouble(&uc, "." "0" "1", NO_FLAGS));
  CHECK_EQ(1e-11, StringToDouble(&uc, "." "0000000000" "1", NO_FLAGS));
  CHECK_EQ(1e-21, StringToDouble(&uc, "." "0000000000" "0000000000" "1",
                                 NO_FLAGS));
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  CHECK_EQ(1e-61, StringToDouble(&uc, "." "0000000000" "0000000000" "0000000000"
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      "0000000000" "0000000000" "0000000000" "1", NO_FLAGS));


  // x = 24414062505131248.0 and y = 24414062505131252.0 are representable in
  // double. Check chat z = (x + y) / 2 is rounded to x...
  CHECK_EQ(24414062505131248.0,
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           StringToDouble(&uc, "24414062505131250.0", NO_FLAGS));
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  // ... and z = (x + y) / 2 + delta is rounded to y.
  CHECK_EQ(24414062505131252.0,
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           StringToDouble(&uc, "24414062505131250.000000001", NO_FLAGS));
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}


TEST(MaximumSignificantDigits) {
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  UnicodeCache uc;
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  char num[] =
      "4.4501477170144020250819966727949918635852426585926051135169509"
      "122872622312493126406953054127118942431783801370080830523154578"
      "251545303238277269592368457430440993619708911874715081505094180"
      "604803751173783204118519353387964161152051487413083163272520124"
      "606023105869053620631175265621765214646643181420505164043632222"
      "668006474326056011713528291579642227455489682133472873831754840"
      "341397809846934151055619529382191981473003234105366170879223151"
      "087335413188049110555339027884856781219017754500629806224571029"
      "581637117459456877330110324211689177656713705497387108207822477"
      "584250967061891687062782163335299376138075114200886249979505279"
      "101870966346394401564490729731565935244123171539810221213221201"
      "847003580761626016356864581135848683152156368691976240370422601"
      "6998291015625000000000000000000000000000000000e-308";

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  CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
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  // Changes the result of strtod (at least in glibc implementation).
  num[sizeof(num) - 8] = '1';

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  CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
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}

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TEST(MinimumExponent) {
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  UnicodeCache uc;
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  // Same test but with different point-position.
  char num[] =
  "445014771701440202508199667279499186358524265859260511351695091"
  "228726223124931264069530541271189424317838013700808305231545782"
  "515453032382772695923684574304409936197089118747150815050941806"
  "048037511737832041185193533879641611520514874130831632725201246"
  "060231058690536206311752656217652146466431814205051640436322226"
  "680064743260560117135282915796422274554896821334728738317548403"
  "413978098469341510556195293821919814730032341053661708792231510"
  "873354131880491105553390278848567812190177545006298062245710295"
  "816371174594568773301103242116891776567137054973871082078224775"
  "842509670618916870627821633352993761380751142008862499795052791"
  "018709663463944015644907297315659352441231715398102212132212018"
  "470035807616260163568645811358486831521563686919762403704226016"
  "998291015625000000000000000000000000000000000e-1108";

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  CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
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  // Changes the result of strtod (at least in glibc implementation).
  num[sizeof(num) - 8] = '1';

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  CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
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}


TEST(MaximumExponent) {
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  UnicodeCache uc;
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  char num[] = "0.16e309";

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  CHECK_EQ(1.59999999999999997765e+308, StringToDouble(&uc, num, NO_FLAGS));
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}

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TEST(ExponentNumberStr) {
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  UnicodeCache uc;
  CHECK_EQ(1e1, StringToDouble(&uc, "1e1", NO_FLAGS));
  CHECK_EQ(1e1, StringToDouble(&uc, "1e+1", NO_FLAGS));
  CHECK_EQ(1e-1, StringToDouble(&uc, "1e-1", NO_FLAGS));
  CHECK_EQ(1e100, StringToDouble(&uc, "1e+100", NO_FLAGS));
  CHECK_EQ(1e-100, StringToDouble(&uc, "1e-100", NO_FLAGS));
  CHECK_EQ(1e-106, StringToDouble(&uc, ".000001e-100", NO_FLAGS));
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}

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class OneBit1: public BitField<uint32_t, 0, 1> {};
class OneBit2: public BitField<uint32_t, 7, 1> {};
class EightBit1: public BitField<uint32_t, 0, 8> {};
class EightBit2: public BitField<uint32_t, 13, 8> {};

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TEST(BitField) {
  uint32_t x;

  // One bit bit field can hold values 0 and 1.
  CHECK(!OneBit1::is_valid(static_cast<uint32_t>(-1)));
  CHECK(!OneBit2::is_valid(static_cast<uint32_t>(-1)));
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  for (unsigned i = 0; i < 2; i++) {
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    CHECK(OneBit1::is_valid(i));
    x = OneBit1::encode(i);
    CHECK_EQ(i, OneBit1::decode(x));

    CHECK(OneBit2::is_valid(i));
    x = OneBit2::encode(i);
    CHECK_EQ(i, OneBit2::decode(x));
  }
  CHECK(!OneBit1::is_valid(2));
  CHECK(!OneBit2::is_valid(2));

  // Eight bit bit field can hold values from 0 tp 255.
  CHECK(!EightBit1::is_valid(static_cast<uint32_t>(-1)));
  CHECK(!EightBit2::is_valid(static_cast<uint32_t>(-1)));
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  for (unsigned i = 0; i < 256; i++) {
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    CHECK(EightBit1::is_valid(i));
    x = EightBit1::encode(i);
    CHECK_EQ(i, EightBit1::decode(x));
    CHECK(EightBit2::is_valid(i));
    x = EightBit2::encode(i);
    CHECK_EQ(i, EightBit2::decode(x));
  }
  CHECK(!EightBit1::is_valid(256));
  CHECK(!EightBit2::is_valid(256));
}
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class UpperBits: public BitField64<int, 61, 3> {};
class MiddleBits: public BitField64<int, 31, 2> {};

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TEST(BitField64) {
  uint64_t x;

  // Test most significant bits.
  x = V8_2PART_UINT64_C(0xE0000000, 00000000);
  CHECK(x == UpperBits::encode(7));
  CHECK_EQ(7, UpperBits::decode(x));

  // Test the 32/64-bit boundary bits.
  x = V8_2PART_UINT64_C(0x00000001, 80000000);
  CHECK(x == MiddleBits::encode(3));
  CHECK_EQ(3, MiddleBits::decode(x));
}
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static void CheckNonArrayIndex(bool expected, const char* chars) {
  auto isolate = CcTest::i_isolate();
  auto string = isolate->factory()->NewStringFromAsciiChecked(chars);
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  CHECK_EQ(expected, IsSpecialIndex(isolate->unicode_cache(), *string));
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}


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TEST(SpecialIndexParsing) {
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  auto isolate = CcTest::i_isolate();
  HandleScope scope(isolate);
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  CheckNonArrayIndex(false, "");
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  CheckNonArrayIndex(false, "-");
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  CheckNonArrayIndex(true, "0");
  CheckNonArrayIndex(true, "-0");
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  CheckNonArrayIndex(false, "01");
  CheckNonArrayIndex(false, "-01");
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  CheckNonArrayIndex(true, "0.5");
  CheckNonArrayIndex(true, "-0.5");
  CheckNonArrayIndex(true, "1");
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  CheckNonArrayIndex(true, "-1");
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  CheckNonArrayIndex(true, "10");
  CheckNonArrayIndex(true, "-10");
  CheckNonArrayIndex(true, "NaN");
  CheckNonArrayIndex(true, "Infinity");
  CheckNonArrayIndex(true, "-Infinity");
  CheckNonArrayIndex(true, "4294967295");
  CheckNonArrayIndex(true, "429496.7295");
  CheckNonArrayIndex(true, "1.3333333333333333");
  CheckNonArrayIndex(false, "1.3333333333333339");
  CheckNonArrayIndex(true, "1.333333333333331e+222");
  CheckNonArrayIndex(true, "-1.3333333333333211e+222");
  CheckNonArrayIndex(false, "-1.3333333333333311e+222");
  CheckNonArrayIndex(true, "429496.7295");
  CheckNonArrayIndex(false, "43s3");
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  CheckNonArrayIndex(true, "4294967296");
  CheckNonArrayIndex(true, "-4294967296");
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  CheckNonArrayIndex(true, "999999999999999");
  CheckNonArrayIndex(false, "9999999999999999");
  CheckNonArrayIndex(true, "-999999999999999");
  CheckNonArrayIndex(false, "-9999999999999999");
  CheckNonArrayIndex(false, "42949672964294967296429496729694966");
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}