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      1 // Copyright 2011 the V8 project authors. All rights reserved.
      2 
      3 #include <stdlib.h>
      4 
      5 #include "v8.h"
      6 
      7 #include "platform.h"
      8 #include "cctest.h"
      9 
     10 using namespace v8::internal;
     11 
     12 
     13 TEST(Hex) {
     14   UnicodeCache uc;
     15   CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX | ALLOW_OCTALS));
     16   CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX | ALLOW_OCTALS));
     17   CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX | ALLOW_OCTALS));
     18   CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX | ALLOW_OCTALS));
     19   CHECK_EQ(255.0, StringToDouble(&uc, "0xff", ALLOW_HEX | ALLOW_OCTALS));
     20   CHECK_EQ(175.0, StringToDouble(&uc, "0xAF", ALLOW_HEX | ALLOW_OCTALS));
     21 
     22   CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX));
     23   CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX));
     24   CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX));
     25   CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX));
     26   CHECK_EQ(255.0, StringToDouble(&uc, "0xff", ALLOW_HEX));
     27   CHECK_EQ(175.0, StringToDouble(&uc, "0xAF", ALLOW_HEX));
     28 }
     29 
     30 
     31 TEST(Octal) {
     32   UnicodeCache uc;
     33   CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX | ALLOW_OCTALS));
     34   CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX | ALLOW_OCTALS));
     35   CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX | ALLOW_OCTALS));
     36   CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX | ALLOW_OCTALS));
     37   CHECK_EQ(8.0, StringToDouble(&uc, "010", ALLOW_HEX | ALLOW_OCTALS));
     38   CHECK_EQ(63.0, StringToDouble(&uc, "077", ALLOW_HEX | ALLOW_OCTALS));
     39 
     40   CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX));
     41   CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX));
     42   CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX));
     43   CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX));
     44   CHECK_EQ(10.0, StringToDouble(&uc, "010", ALLOW_HEX));
     45   CHECK_EQ(77.0, StringToDouble(&uc, "077", ALLOW_HEX));
     46 
     47   const double x = 010000000000;  // Power of 2, no rounding errors.
     48   CHECK_EQ(x * x * x * x * x, StringToDouble(&uc, "01" "0000000000" "0000000000"
     49       "0000000000" "0000000000" "0000000000", ALLOW_OCTALS));
     50 }
     51 
     52 
     53 TEST(MalformedOctal) {
     54   UnicodeCache uc;
     55   CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX | ALLOW_OCTALS));
     56   CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX | ALLOW_OCTALS));
     57   CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX | ALLOW_OCTALS));
     58 
     59   CHECK(isnan(StringToDouble(&uc, "07.7", ALLOW_HEX | ALLOW_OCTALS)));
     60   CHECK(isnan(StringToDouble(&uc, "07.8", ALLOW_HEX | ALLOW_OCTALS)));
     61   CHECK(isnan(StringToDouble(&uc, "07e8", ALLOW_HEX | ALLOW_OCTALS)));
     62   CHECK(isnan(StringToDouble(&uc, "07e7", ALLOW_HEX | ALLOW_OCTALS)));
     63 
     64   CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX | ALLOW_OCTALS));
     65   CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX | ALLOW_OCTALS));
     66 
     67   CHECK_EQ(0.001, StringToDouble(&uc, "0.001", ALLOW_HEX | ALLOW_OCTALS));
     68   CHECK_EQ(0.713, StringToDouble(&uc, "0.713", ALLOW_HEX | ALLOW_OCTALS));
     69 
     70   CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX));
     71   CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX));
     72   CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX));
     73 
     74   CHECK_EQ(7.7, StringToDouble(&uc, "07.7", ALLOW_HEX));
     75   CHECK_EQ(7.8, StringToDouble(&uc, "07.8", ALLOW_HEX));
     76   CHECK_EQ(7e8, StringToDouble(&uc, "07e8", ALLOW_HEX));
     77   CHECK_EQ(7e7, StringToDouble(&uc, "07e7", ALLOW_HEX));
     78 
     79   CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX));
     80   CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX));
     81 
     82   CHECK_EQ(0.001, StringToDouble(&uc, "0.001", ALLOW_HEX));
     83   CHECK_EQ(0.713, StringToDouble(&uc, "0.713", ALLOW_HEX));
     84 }
     85 
     86 
     87 TEST(TrailingJunk) {
     88   UnicodeCache uc;
     89   CHECK_EQ(8.0, StringToDouble(&uc, "8q", ALLOW_TRAILING_JUNK));
     90   CHECK_EQ(63.0,
     91            StringToDouble(&uc, "077qqq", ALLOW_OCTALS | ALLOW_TRAILING_JUNK));
     92   CHECK_EQ(10.0,
     93            StringToDouble(&uc, "10e", ALLOW_OCTALS | ALLOW_TRAILING_JUNK));
     94   CHECK_EQ(10.0,
     95            StringToDouble(&uc, "10e-", ALLOW_OCTALS | ALLOW_TRAILING_JUNK));
     96 }
     97 
     98 
     99 TEST(NonStrDecimalLiteral) {
    100   UnicodeCache uc;
    101   CHECK(isnan(StringToDouble(&uc, " ", NO_FLAGS, OS::nan_value())));
    102   CHECK(isnan(StringToDouble(&uc, "", NO_FLAGS, OS::nan_value())));
    103   CHECK(isnan(StringToDouble(&uc, " ", NO_FLAGS, OS::nan_value())));
    104   CHECK_EQ(0.0, StringToDouble(&uc, "", NO_FLAGS));
    105   CHECK_EQ(0.0, StringToDouble(&uc, " ", NO_FLAGS));
    106 }
    107 
    108 TEST(IntegerStrLiteral) {
    109   UnicodeCache uc;
    110   CHECK_EQ(0.0, StringToDouble(&uc, "0.0", NO_FLAGS));
    111   CHECK_EQ(0.0, StringToDouble(&uc, "0", NO_FLAGS));
    112   CHECK_EQ(0.0, StringToDouble(&uc, "00", NO_FLAGS));
    113   CHECK_EQ(0.0, StringToDouble(&uc, "000", NO_FLAGS));
    114   CHECK_EQ(1.0, StringToDouble(&uc, "1", NO_FLAGS));
    115   CHECK_EQ(-1.0, StringToDouble(&uc, "-1", NO_FLAGS));
    116   CHECK_EQ(-1.0, StringToDouble(&uc, "  -1  ", NO_FLAGS));
    117   CHECK_EQ(1.0, StringToDouble(&uc, "  +1  ", NO_FLAGS));
    118   CHECK(isnan(StringToDouble(&uc, "  -  1  ", NO_FLAGS)));
    119   CHECK(isnan(StringToDouble(&uc, "  +  1  ", NO_FLAGS)));
    120 
    121   CHECK_EQ(0.0, StringToDouble(&uc, "0e0", ALLOW_HEX | ALLOW_OCTALS));
    122   CHECK_EQ(0.0, StringToDouble(&uc, "0e1", ALLOW_HEX | ALLOW_OCTALS));
    123   CHECK_EQ(0.0, StringToDouble(&uc, "0e-1", ALLOW_HEX | ALLOW_OCTALS));
    124   CHECK_EQ(0.0, StringToDouble(&uc, "0e-100000", ALLOW_HEX | ALLOW_OCTALS));
    125   CHECK_EQ(0.0, StringToDouble(&uc, "0e+100000", ALLOW_HEX | ALLOW_OCTALS));
    126   CHECK_EQ(0.0, StringToDouble(&uc, "0.", ALLOW_HEX | ALLOW_OCTALS));
    127 }
    128 
    129 TEST(LongNumberStr) {
    130   UnicodeCache uc;
    131   CHECK_EQ(1e10, StringToDouble(&uc, "1" "0000000000", NO_FLAGS));
    132   CHECK_EQ(1e20, StringToDouble(&uc, "1" "0000000000" "0000000000", NO_FLAGS));
    133 
    134   CHECK_EQ(1e60, StringToDouble(&uc, "1" "0000000000" "0000000000" "0000000000"
    135       "0000000000" "0000000000" "0000000000", NO_FLAGS));
    136 
    137   CHECK_EQ(1e-2, StringToDouble(&uc, "." "0" "1", NO_FLAGS));
    138   CHECK_EQ(1e-11, StringToDouble(&uc, "." "0000000000" "1", NO_FLAGS));
    139   CHECK_EQ(1e-21, StringToDouble(&uc, "." "0000000000" "0000000000" "1",
    140                                  NO_FLAGS));
    141 
    142   CHECK_EQ(1e-61, StringToDouble(&uc, "." "0000000000" "0000000000" "0000000000"
    143       "0000000000" "0000000000" "0000000000" "1", NO_FLAGS));
    144 
    145 
    146   // x = 24414062505131248.0 and y = 24414062505131252.0 are representable in
    147   // double. Check chat z = (x + y) / 2 is rounded to x...
    148   CHECK_EQ(24414062505131248.0,
    149            StringToDouble(&uc, "24414062505131250.0", NO_FLAGS));
    150 
    151   // ... and z = (x + y) / 2 + delta is rounded to y.
    152   CHECK_EQ(24414062505131252.0,
    153            StringToDouble(&uc, "24414062505131250.000000001", NO_FLAGS));
    154 }
    155 
    156 
    157 TEST(MaximumSignificantDigits) {
    158   UnicodeCache uc;
    159   char num[] =
    160       "4.4501477170144020250819966727949918635852426585926051135169509"
    161       "122872622312493126406953054127118942431783801370080830523154578"
    162       "251545303238277269592368457430440993619708911874715081505094180"
    163       "604803751173783204118519353387964161152051487413083163272520124"
    164       "606023105869053620631175265621765214646643181420505164043632222"
    165       "668006474326056011713528291579642227455489682133472873831754840"
    166       "341397809846934151055619529382191981473003234105366170879223151"
    167       "087335413188049110555339027884856781219017754500629806224571029"
    168       "581637117459456877330110324211689177656713705497387108207822477"
    169       "584250967061891687062782163335299376138075114200886249979505279"
    170       "101870966346394401564490729731565935244123171539810221213221201"
    171       "847003580761626016356864581135848683152156368691976240370422601"
    172       "6998291015625000000000000000000000000000000000e-308";
    173 
    174   CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
    175 
    176   // Changes the result of strtod (at least in glibc implementation).
    177   num[sizeof(num) - 8] = '1';
    178 
    179   CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
    180 }
    181 
    182 TEST(MinimumExponent) {
    183   UnicodeCache uc;
    184   // Same test but with different point-position.
    185   char num[] =
    186   "445014771701440202508199667279499186358524265859260511351695091"
    187   "228726223124931264069530541271189424317838013700808305231545782"
    188   "515453032382772695923684574304409936197089118747150815050941806"
    189   "048037511737832041185193533879641611520514874130831632725201246"
    190   "060231058690536206311752656217652146466431814205051640436322226"
    191   "680064743260560117135282915796422274554896821334728738317548403"
    192   "413978098469341510556195293821919814730032341053661708792231510"
    193   "873354131880491105553390278848567812190177545006298062245710295"
    194   "816371174594568773301103242116891776567137054973871082078224775"
    195   "842509670618916870627821633352993761380751142008862499795052791"
    196   "018709663463944015644907297315659352441231715398102212132212018"
    197   "470035807616260163568645811358486831521563686919762403704226016"
    198   "998291015625000000000000000000000000000000000e-1108";
    199 
    200   CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
    201 
    202   // Changes the result of strtod (at least in glibc implementation).
    203   num[sizeof(num) - 8] = '1';
    204 
    205   CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
    206 }
    207 
    208 
    209 TEST(MaximumExponent) {
    210   UnicodeCache uc;
    211   char num[] = "0.16e309";
    212 
    213   CHECK_EQ(1.59999999999999997765e+308, StringToDouble(&uc, num, NO_FLAGS));
    214 }
    215 
    216 
    217 TEST(ExponentNumberStr) {
    218   UnicodeCache uc;
    219   CHECK_EQ(1e1, StringToDouble(&uc, "1e1", NO_FLAGS));
    220   CHECK_EQ(1e1, StringToDouble(&uc, "1e+1", NO_FLAGS));
    221   CHECK_EQ(1e-1, StringToDouble(&uc, "1e-1", NO_FLAGS));
    222   CHECK_EQ(1e100, StringToDouble(&uc, "1e+100", NO_FLAGS));
    223   CHECK_EQ(1e-100, StringToDouble(&uc, "1e-100", NO_FLAGS));
    224   CHECK_EQ(1e-106, StringToDouble(&uc, ".000001e-100", NO_FLAGS));
    225 }
    226 
    227 class OneBit1: public BitField<uint32_t, 0, 1> {};
    228 class OneBit2: public BitField<uint32_t, 7, 1> {};
    229 class EightBit1: public BitField<uint32_t, 0, 8> {};
    230 class EightBit2: public BitField<uint32_t, 13, 8> {};
    231 
    232 TEST(BitField) {
    233   uint32_t x;
    234 
    235   // One bit bit field can hold values 0 and 1.
    236   CHECK(!OneBit1::is_valid(static_cast<uint32_t>(-1)));
    237   CHECK(!OneBit2::is_valid(static_cast<uint32_t>(-1)));
    238   for (int i = 0; i < 2; i++) {
    239     CHECK(OneBit1::is_valid(i));
    240     x = OneBit1::encode(i);
    241     CHECK_EQ(i, OneBit1::decode(x));
    242 
    243     CHECK(OneBit2::is_valid(i));
    244     x = OneBit2::encode(i);
    245     CHECK_EQ(i, OneBit2::decode(x));
    246   }
    247   CHECK(!OneBit1::is_valid(2));
    248   CHECK(!OneBit2::is_valid(2));
    249 
    250   // Eight bit bit field can hold values from 0 tp 255.
    251   CHECK(!EightBit1::is_valid(static_cast<uint32_t>(-1)));
    252   CHECK(!EightBit2::is_valid(static_cast<uint32_t>(-1)));
    253   for (int i = 0; i < 256; i++) {
    254     CHECK(EightBit1::is_valid(i));
    255     x = EightBit1::encode(i);
    256     CHECK_EQ(i, EightBit1::decode(x));
    257     CHECK(EightBit2::is_valid(i));
    258     x = EightBit2::encode(i);
    259     CHECK_EQ(i, EightBit2::decode(x));
    260   }
    261   CHECK(!EightBit1::is_valid(256));
    262   CHECK(!EightBit2::is_valid(256));
    263 }
    264