1// Copyright 2011 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
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11//       with the distribution.
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13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#include <stdlib.h>
29
30#include "src/v8.h"
31
32#include "src/platform.h"
33#include "test/cctest/cctest.h"
34
35using namespace v8::internal;
36
37
38TEST(Hex) {
39  UnicodeCache uc;
40  CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
41  CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
42  CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
43  CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
44  CHECK_EQ(255.0, StringToDouble(&uc, "0xff",
45                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
46  CHECK_EQ(175.0, StringToDouble(&uc, "0xAF",
47                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
48
49  CHECK_EQ(0.0, StringToDouble(&uc, "0x0", ALLOW_HEX));
50  CHECK_EQ(0.0, StringToDouble(&uc, "0X0", ALLOW_HEX));
51  CHECK_EQ(1.0, StringToDouble(&uc, "0x1", ALLOW_HEX));
52  CHECK_EQ(16.0, StringToDouble(&uc, "0x10", ALLOW_HEX));
53  CHECK_EQ(255.0, StringToDouble(&uc, "0xff", ALLOW_HEX));
54  CHECK_EQ(175.0, StringToDouble(&uc, "0xAF", ALLOW_HEX));
55}
56
57
58TEST(Octal) {
59  UnicodeCache uc;
60  CHECK_EQ(0.0, StringToDouble(&uc, "0o0", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
61  CHECK_EQ(0.0, StringToDouble(&uc, "0O0", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
62  CHECK_EQ(1.0, StringToDouble(&uc, "0o1", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
63  CHECK_EQ(7.0, StringToDouble(&uc, "0o7", ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
64  CHECK_EQ(8.0, StringToDouble(&uc, "0o10",
65                               ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
66  CHECK_EQ(63.0, StringToDouble(&uc, "0o77",
67                                ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL));
68
69  CHECK_EQ(0.0, StringToDouble(&uc, "0o0", ALLOW_OCTAL));
70  CHECK_EQ(0.0, StringToDouble(&uc, "0O0", ALLOW_OCTAL));
71  CHECK_EQ(1.0, StringToDouble(&uc, "0o1", ALLOW_OCTAL));
72  CHECK_EQ(7.0, StringToDouble(&uc, "0o7", ALLOW_OCTAL));
73  CHECK_EQ(8.0, StringToDouble(&uc, "0o10", ALLOW_OCTAL));
74  CHECK_EQ(63.0, StringToDouble(&uc, "0o77", ALLOW_OCTAL));
75}
76
77
78TEST(ImplicitOctal) {
79  UnicodeCache uc;
80  CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
81  CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
82  CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
83  CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
84  CHECK_EQ(8.0, StringToDouble(&uc, "010", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
85  CHECK_EQ(63.0, StringToDouble(&uc, "077", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
86
87  CHECK_EQ(0.0, StringToDouble(&uc, "0", ALLOW_HEX));
88  CHECK_EQ(0.0, StringToDouble(&uc, "00", ALLOW_HEX));
89  CHECK_EQ(1.0, StringToDouble(&uc, "01", ALLOW_HEX));
90  CHECK_EQ(7.0, StringToDouble(&uc, "07", ALLOW_HEX));
91  CHECK_EQ(10.0, StringToDouble(&uc, "010", ALLOW_HEX));
92  CHECK_EQ(77.0, StringToDouble(&uc, "077", ALLOW_HEX));
93
94  const double x = 010000000000;  // Power of 2, no rounding errors.
95  CHECK_EQ(x * x * x * x * x, StringToDouble(&uc, "01" "0000000000" "0000000000"
96      "0000000000" "0000000000" "0000000000", ALLOW_IMPLICIT_OCTAL));
97}
98
99
100TEST(Binary) {
101  UnicodeCache uc;
102  CHECK_EQ(0.0, StringToDouble(&uc, "0b0",
103                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
104  CHECK_EQ(0.0, StringToDouble(&uc, "0B0",
105                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
106  CHECK_EQ(1.0, StringToDouble(&uc, "0b1",
107                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
108  CHECK_EQ(2.0, StringToDouble(&uc, "0b10",
109                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
110  CHECK_EQ(3.0, StringToDouble(&uc, "0b11",
111                               ALLOW_BINARY | ALLOW_IMPLICIT_OCTAL));
112
113  CHECK_EQ(0.0, StringToDouble(&uc, "0b0", ALLOW_BINARY));
114  CHECK_EQ(0.0, StringToDouble(&uc, "0B0", ALLOW_BINARY));
115  CHECK_EQ(1.0, StringToDouble(&uc, "0b1", ALLOW_BINARY));
116  CHECK_EQ(2.0, StringToDouble(&uc, "0b10", ALLOW_BINARY));
117  CHECK_EQ(3.0, StringToDouble(&uc, "0b11", ALLOW_BINARY));
118}
119
120
121TEST(MalformedOctal) {
122  UnicodeCache uc;
123  CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
124  CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
125  CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
126
127  CHECK(std::isnan(StringToDouble(&uc, "07.7",
128                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
129  CHECK(std::isnan(StringToDouble(&uc, "07.8",
130                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
131  CHECK(std::isnan(StringToDouble(&uc, "07e8",
132                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
133  CHECK(std::isnan(StringToDouble(&uc, "07e7",
134                                  ALLOW_HEX | ALLOW_IMPLICIT_OCTAL)));
135
136  CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
137  CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
138
139  CHECK_EQ(0.001, StringToDouble(&uc, "0.001",
140                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
141  CHECK_EQ(0.713, StringToDouble(&uc, "0.713",
142                                 ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
143
144  CHECK_EQ(8.0, StringToDouble(&uc, "08", ALLOW_HEX));
145  CHECK_EQ(81.0, StringToDouble(&uc, "081", ALLOW_HEX));
146  CHECK_EQ(78.0, StringToDouble(&uc, "078", ALLOW_HEX));
147
148  CHECK_EQ(7.7, StringToDouble(&uc, "07.7", ALLOW_HEX));
149  CHECK_EQ(7.8, StringToDouble(&uc, "07.8", ALLOW_HEX));
150  CHECK_EQ(7e8, StringToDouble(&uc, "07e8", ALLOW_HEX));
151  CHECK_EQ(7e7, StringToDouble(&uc, "07e7", ALLOW_HEX));
152
153  CHECK_EQ(8.7, StringToDouble(&uc, "08.7", ALLOW_HEX));
154  CHECK_EQ(8e7, StringToDouble(&uc, "08e7", ALLOW_HEX));
155
156  CHECK_EQ(0.001, StringToDouble(&uc, "0.001", ALLOW_HEX));
157  CHECK_EQ(0.713, StringToDouble(&uc, "0.713", ALLOW_HEX));
158}
159
160
161TEST(TrailingJunk) {
162  UnicodeCache uc;
163  CHECK_EQ(8.0, StringToDouble(&uc, "8q", ALLOW_TRAILING_JUNK));
164  CHECK_EQ(63.0, StringToDouble(&uc, "077qqq",
165                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
166  CHECK_EQ(10.0, StringToDouble(&uc, "10e",
167                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
168  CHECK_EQ(10.0, StringToDouble(&uc, "10e-",
169                                ALLOW_IMPLICIT_OCTAL | ALLOW_TRAILING_JUNK));
170}
171
172
173TEST(NonStrDecimalLiteral) {
174  UnicodeCache uc;
175  CHECK(std::isnan(StringToDouble(&uc, " ", NO_FLAGS, OS::nan_value())));
176  CHECK(std::isnan(StringToDouble(&uc, "", NO_FLAGS, OS::nan_value())));
177  CHECK(std::isnan(StringToDouble(&uc, " ", NO_FLAGS, OS::nan_value())));
178  CHECK_EQ(0.0, StringToDouble(&uc, "", NO_FLAGS));
179  CHECK_EQ(0.0, StringToDouble(&uc, " ", NO_FLAGS));
180}
181
182
183TEST(IntegerStrLiteral) {
184  UnicodeCache uc;
185  CHECK_EQ(0.0, StringToDouble(&uc, "0.0", NO_FLAGS));
186  CHECK_EQ(0.0, StringToDouble(&uc, "0", NO_FLAGS));
187  CHECK_EQ(0.0, StringToDouble(&uc, "00", NO_FLAGS));
188  CHECK_EQ(0.0, StringToDouble(&uc, "000", NO_FLAGS));
189  CHECK_EQ(1.0, StringToDouble(&uc, "1", NO_FLAGS));
190  CHECK_EQ(-1.0, StringToDouble(&uc, "-1", NO_FLAGS));
191  CHECK_EQ(-1.0, StringToDouble(&uc, "  -1  ", NO_FLAGS));
192  CHECK_EQ(1.0, StringToDouble(&uc, "  +1  ", NO_FLAGS));
193  CHECK(std::isnan(StringToDouble(&uc, "  -  1  ", NO_FLAGS)));
194  CHECK(std::isnan(StringToDouble(&uc, "  +  1  ", NO_FLAGS)));
195
196  CHECK_EQ(0.0, StringToDouble(&uc, "0e0", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
197  CHECK_EQ(0.0, StringToDouble(&uc, "0e1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
198  CHECK_EQ(0.0, StringToDouble(&uc, "0e-1", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
199  CHECK_EQ(0.0, StringToDouble(&uc, "0e-100000",
200                               ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
201  CHECK_EQ(0.0, StringToDouble(&uc, "0e+100000",
202                               ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
203  CHECK_EQ(0.0, StringToDouble(&uc, "0.", ALLOW_HEX | ALLOW_IMPLICIT_OCTAL));
204}
205
206
207TEST(LongNumberStr) {
208  UnicodeCache uc;
209  CHECK_EQ(1e10, StringToDouble(&uc, "1" "0000000000", NO_FLAGS));
210  CHECK_EQ(1e20, StringToDouble(&uc, "1" "0000000000" "0000000000", NO_FLAGS));
211
212  CHECK_EQ(1e60, StringToDouble(&uc, "1" "0000000000" "0000000000" "0000000000"
213      "0000000000" "0000000000" "0000000000", NO_FLAGS));
214
215  CHECK_EQ(1e-2, StringToDouble(&uc, "." "0" "1", NO_FLAGS));
216  CHECK_EQ(1e-11, StringToDouble(&uc, "." "0000000000" "1", NO_FLAGS));
217  CHECK_EQ(1e-21, StringToDouble(&uc, "." "0000000000" "0000000000" "1",
218                                 NO_FLAGS));
219
220  CHECK_EQ(1e-61, StringToDouble(&uc, "." "0000000000" "0000000000" "0000000000"
221      "0000000000" "0000000000" "0000000000" "1", NO_FLAGS));
222
223
224  // x = 24414062505131248.0 and y = 24414062505131252.0 are representable in
225  // double. Check chat z = (x + y) / 2 is rounded to x...
226  CHECK_EQ(24414062505131248.0,
227           StringToDouble(&uc, "24414062505131250.0", NO_FLAGS));
228
229  // ... and z = (x + y) / 2 + delta is rounded to y.
230  CHECK_EQ(24414062505131252.0,
231           StringToDouble(&uc, "24414062505131250.000000001", NO_FLAGS));
232}
233
234
235TEST(MaximumSignificantDigits) {
236  UnicodeCache uc;
237  char num[] =
238      "4.4501477170144020250819966727949918635852426585926051135169509"
239      "122872622312493126406953054127118942431783801370080830523154578"
240      "251545303238277269592368457430440993619708911874715081505094180"
241      "604803751173783204118519353387964161152051487413083163272520124"
242      "606023105869053620631175265621765214646643181420505164043632222"
243      "668006474326056011713528291579642227455489682133472873831754840"
244      "341397809846934151055619529382191981473003234105366170879223151"
245      "087335413188049110555339027884856781219017754500629806224571029"
246      "581637117459456877330110324211689177656713705497387108207822477"
247      "584250967061891687062782163335299376138075114200886249979505279"
248      "101870966346394401564490729731565935244123171539810221213221201"
249      "847003580761626016356864581135848683152156368691976240370422601"
250      "6998291015625000000000000000000000000000000000e-308";
251
252  CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
253
254  // Changes the result of strtod (at least in glibc implementation).
255  num[sizeof(num) - 8] = '1';
256
257  CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
258}
259
260
261TEST(MinimumExponent) {
262  UnicodeCache uc;
263  // Same test but with different point-position.
264  char num[] =
265  "445014771701440202508199667279499186358524265859260511351695091"
266  "228726223124931264069530541271189424317838013700808305231545782"
267  "515453032382772695923684574304409936197089118747150815050941806"
268  "048037511737832041185193533879641611520514874130831632725201246"
269  "060231058690536206311752656217652146466431814205051640436322226"
270  "680064743260560117135282915796422274554896821334728738317548403"
271  "413978098469341510556195293821919814730032341053661708792231510"
272  "873354131880491105553390278848567812190177545006298062245710295"
273  "816371174594568773301103242116891776567137054973871082078224775"
274  "842509670618916870627821633352993761380751142008862499795052791"
275  "018709663463944015644907297315659352441231715398102212132212018"
276  "470035807616260163568645811358486831521563686919762403704226016"
277  "998291015625000000000000000000000000000000000e-1108";
278
279  CHECK_EQ(4.4501477170144017780491e-308, StringToDouble(&uc, num, NO_FLAGS));
280
281  // Changes the result of strtod (at least in glibc implementation).
282  num[sizeof(num) - 8] = '1';
283
284  CHECK_EQ(4.4501477170144022721148e-308, StringToDouble(&uc, num, NO_FLAGS));
285}
286
287
288TEST(MaximumExponent) {
289  UnicodeCache uc;
290  char num[] = "0.16e309";
291
292  CHECK_EQ(1.59999999999999997765e+308, StringToDouble(&uc, num, NO_FLAGS));
293}
294
295
296TEST(ExponentNumberStr) {
297  UnicodeCache uc;
298  CHECK_EQ(1e1, StringToDouble(&uc, "1e1", NO_FLAGS));
299  CHECK_EQ(1e1, StringToDouble(&uc, "1e+1", NO_FLAGS));
300  CHECK_EQ(1e-1, StringToDouble(&uc, "1e-1", NO_FLAGS));
301  CHECK_EQ(1e100, StringToDouble(&uc, "1e+100", NO_FLAGS));
302  CHECK_EQ(1e-100, StringToDouble(&uc, "1e-100", NO_FLAGS));
303  CHECK_EQ(1e-106, StringToDouble(&uc, ".000001e-100", NO_FLAGS));
304}
305
306
307class OneBit1: public BitField<uint32_t, 0, 1> {};
308class OneBit2: public BitField<uint32_t, 7, 1> {};
309class EightBit1: public BitField<uint32_t, 0, 8> {};
310class EightBit2: public BitField<uint32_t, 13, 8> {};
311
312TEST(BitField) {
313  uint32_t x;
314
315  // One bit bit field can hold values 0 and 1.
316  CHECK(!OneBit1::is_valid(static_cast<uint32_t>(-1)));
317  CHECK(!OneBit2::is_valid(static_cast<uint32_t>(-1)));
318  for (int i = 0; i < 2; i++) {
319    CHECK(OneBit1::is_valid(i));
320    x = OneBit1::encode(i);
321    CHECK_EQ(i, OneBit1::decode(x));
322
323    CHECK(OneBit2::is_valid(i));
324    x = OneBit2::encode(i);
325    CHECK_EQ(i, OneBit2::decode(x));
326  }
327  CHECK(!OneBit1::is_valid(2));
328  CHECK(!OneBit2::is_valid(2));
329
330  // Eight bit bit field can hold values from 0 tp 255.
331  CHECK(!EightBit1::is_valid(static_cast<uint32_t>(-1)));
332  CHECK(!EightBit2::is_valid(static_cast<uint32_t>(-1)));
333  for (int i = 0; i < 256; i++) {
334    CHECK(EightBit1::is_valid(i));
335    x = EightBit1::encode(i);
336    CHECK_EQ(i, EightBit1::decode(x));
337    CHECK(EightBit2::is_valid(i));
338    x = EightBit2::encode(i);
339    CHECK_EQ(i, EightBit2::decode(x));
340  }
341  CHECK(!EightBit1::is_valid(256));
342  CHECK(!EightBit2::is_valid(256));
343}
344
345
346class UpperBits: public BitField64<int, 61, 3> {};
347class MiddleBits: public BitField64<int, 31, 2> {};
348
349TEST(BitField64) {
350  uint64_t x;
351
352  // Test most significant bits.
353  x = V8_2PART_UINT64_C(0xE0000000, 00000000);
354  CHECK(x == UpperBits::encode(7));
355  CHECK_EQ(7, UpperBits::decode(x));
356
357  // Test the 32/64-bit boundary bits.
358  x = V8_2PART_UINT64_C(0x00000001, 80000000);
359  CHECK(x == MiddleBits::encode(3));
360  CHECK_EQ(3, MiddleBits::decode(x));
361}
362