duktape/ecmascript-testcases/test-builtin-global-parsefloat.js

/*
 *  parseFloat() tests.
 */

var WHITESPACE_CODEPOINTS = [
    // from WhiteSpace production
    0x0009,    // <TAB>
    0x000B,    // <VT>      
    0x000C,    // <FF>
    0x0020,    // <SP>
    0x00A0,    // <NBSP>
    0xFEFF,    // <BOM>

    // WhiteSpace production also has <USP>, which means any other Unicode
    // space separator (category Zs), which needs to be checked from (up to
    // date) Unicode data.  The WhiteSpace-Z.txt file, created as part of
    // the build, currently contains (duplicates eliminated):

//  0x0020,    // 0020;SPACE;Zs;0;WS;;;;;N;;;;;
//  0x00A0,    // 00A0;NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;NON-BREAKING SPACE;;;;
    0x1680,    // 1680;OGHAM SPACE MARK;Zs;0;WS;;;;;N;;;;;
    0x180E,    // 180E;MONGOLIAN VOWEL SEPARATOR;Zs;0;WS;;;;;N;;;;;
    0x2000,    // 2000;EN QUAD;Zs;0;WS;2002;;;;N;;;;;
    0x2001,    // 2001;EM QUAD;Zs;0;WS;2003;;;;N;;;;;
    0x2002,    // 2002;EN SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2003,    // 2003;EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2004,    // 2004;THREE-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2005,    // 2005;FOUR-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2006,    // 2006;SIX-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2007,    // 2007;FIGURE SPACE;Zs;0;WS;<noBreak> 0020;;;;N;;;;;
    0x2008,    // 2008;PUNCTUATION SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x2009,    // 2009;THIN SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x200A,    // 200A;HAIR SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
//  0x2028,    // 2028;LINE SEPARATOR;Zl;0;WS;;;;;N;;;;;
//  0x2029,    // 2029;PARAGRAPH SEPARATOR;Zp;0;B;;;;;N;;;;;
    0x202F,    // 202F;NARROW NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;;;;;
    0x205F,    // 205F;MEDIUM MATHEMATICAL SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
    0x3000,    // 3000;IDEOGRAPHIC SPACE;Zs;0;WS;<wide> 0020;;;;N;;;;;
 
    // from LineTerminator production
    0x000a,    // <LF>
    0x000d,    // <CR>
    0x2028,    // <LS>
    0x2029,    // <PS>
];

// indirect eval -> this is bound to the global object, E5 Section 10.4.2, step 1.a.
var g = (function () { var e = eval; return e('this'); } )();

/*===
basic cases
Infinity number Infinity
+Infinity number Infinity
-Infinity number -Infinity
   Infinity number Infinity
   +Infinity number Infinity
   -Infinity number -Infinity
   Infinityxyz number Infinity
   +Infinityxyz number Infinity
   -Infinityxyz number -Infinity
123. number 123
+123. number 123
-123. number -123
   123. number 123
   +123. number 123
   -123. number -123
   123.xyz number 123
   +123.xyz number 123
   -123.xyz number -123
123.e1 number 1230
+123.e1 number 1230
-123.e1 number -1230
   123.e1 number 1230
   +123.e1 number 1230
   -123.e1 number -1230
   123.e1xyz number 1230
   +123.e1xyz number 1230
   -123.e1xyz number -1230
123.+e1 number 123
+123.+e1 number 123
-123.+e1 number -123
   123.+e1 number 123
   +123.+e1 number 123
   -123.+e1 number -123
   123.+e1xyz number 123
   +123.+e1xyz number 123
   -123.+e1xyz number -123
123.-e1 number 123
+123.-e1 number 123
-123.-e1 number -123
   123.-e1 number 123
   +123.-e1 number 123
   -123.-e1 number -123
   123.-e1xyz number 123
   +123.-e1xyz number 123
   -123.-e1xyz number -123
123.4 number 123.4
+123.4 number 123.4
-123.4 number -123.4
   123.4 number 123.4
   +123.4 number 123.4
   -123.4 number -123.4
   123.4xyz number 123.4
   +123.4xyz number 123.4
   -123.4xyz number -123.4
123.4e1 number 1234
+123.4e1 number 1234
-123.4e1 number -1234
   123.4e1 number 1234
   +123.4e1 number 1234
   -123.4e1 number -1234
   123.4e1xyz number 1234
   +123.4e1xyz number 1234
   -123.4e1xyz number -1234
123.4e+1 number 1234
+123.4e+1 number 1234
-123.4e+1 number -1234
   123.4e+1 number 1234
   +123.4e+1 number 1234
   -123.4e+1 number -1234
   123.4e+1xyz number 1234
   +123.4e+1xyz number 1234
   -123.4e+1xyz number -1234
123.4e-1 number 12.34
+123.4e-1 number 12.34
-123.4e-1 number -12.34
   123.4e-1 number 12.34
   +123.4e-1 number 12.34
   -123.4e-1 number -12.34
   123.4e-1xyz number 12.34
   +123.4e-1xyz number 12.34
   -123.4e-1xyz number -12.34
.123 number 0.123
+.123 number 0.123
-.123 number -0.123
   .123 number 0.123
   +.123 number 0.123
   -.123 number -0.123
   .123xyz number 0.123
   +.123xyz number 0.123
   -.123xyz number -0.123
.123e1 number 1.23
+.123e1 number 1.23
-.123e1 number -1.23
   .123e1 number 1.23
   +.123e1 number 1.23
   -.123e1 number -1.23
   .123e1xyz number 1.23
   +.123e1xyz number 1.23
   -.123e1xyz number -1.23
.123e+1 number 1.23
+.123e+1 number 1.23
-.123e+1 number -1.23
   .123e+1 number 1.23
   +.123e+1 number 1.23
   -.123e+1 number -1.23
   .123e+1xyz number 1.23
   +.123e+1xyz number 1.23
   -.123e+1xyz number -1.23
.123e-1 number 0.0123
+.123e-1 number 0.0123
-.123e-1 number -0.0123
   .123e-1 number 0.0123
   +.123e-1 number 0.0123
   -.123e-1 number -0.0123
   .123e-1xyz number 0.0123
   +.123e-1xyz number 0.0123
   -.123e-1xyz number -0.0123
123 number 123
+123 number 123
-123 number -123
   123 number 123
   +123 number 123
   -123 number -123
   123xyz number 123
   +123xyz number 123
   -123xyz number -123
123e1 number 1230
+123e1 number 1230
-123e1 number -1230
   123e1 number 1230
   +123e1 number 1230
   -123e1 number -1230
   123e1xyz number 1230
   +123e1xyz number 1230
   -123e1xyz number -1230
123e+1 number 1230
+123e+1 number 1230
-123e+1 number -1230
   123e+1 number 1230
   +123e+1 number 1230
   -123e+1 number -1230
   123e+1xyz number 1230
   +123e+1xyz number 1230
   -123e+1xyz number -1230
123e-1 number 12.3
+123e-1 number 12.3
-123e-1 number -12.3
   123e-1 number 12.3
   +123e-1 number 12.3
   -123e-1 number -12.3
   123e-1xyz number 12.3
   +123e-1xyz number 12.3
   -123e-1xyz number -12.3
not-a-number number NaN
+not-a-number number NaN
-not-a-number number NaN
   not-a-number number NaN
   +not-a-number number NaN
   -not-a-number number NaN
   not-a-numberxyz number NaN
   +not-a-numberxyz number NaN
   -not-a-numberxyz number NaN
===*/

/* Test basic grammar cases.  The relevant grammar rule is StrDecimalLiteral.
 */

print('basic cases');

function basicTest() {
    var base_values = [
        'Infinity',

        '123.',
        '123.e1',
        '123.+e1',
        '123.-e1',
        '123.4',
        '123.4e1',
        '123.4e+1',
        '123.4e-1',

        '.123',
        '.123e1',
        '.123e+1',
        '.123e-1',

        '123',
        '123e1',
        '123e+1',
        '123e-1',

        'not-a-number',
    ];
    var tests = [];
    var i;
    var t;

    for (i = 0; i < base_values.length; i++) {
        t = base_values[i];
        tests.push('' + t);
        tests.push('+' + t);
        tests.push('-' + t);
        tests.push('   ' + t);
        tests.push('   +' + t);
        tests.push('   -' + t);
        tests.push('   ' + t + 'xyz');
        tests.push('   +' + t + 'xyz');
        tests.push('   -' + t + 'xyz');
    }

    for (i = 0; i < tests.length; i++) {
        t = g.parseFloat(tests[i]);
        print(tests[i], typeof t, t);
    }
}

try {
    basicTest();
} catch (e) {
    print(e.name);
}

/*===
coercion
toString()
123.4
===*/

/* parseFloat coercion: ToString() followed by string parsing. */

print('coercion');

try {
    print(g.parseFloat(
        { toString: function() { print('toString()'); return '123.4'; },
          valueOf: function() { print('valueOf()'); return 123.4; } }
    ));
} catch (e) {
    print(e.name);
}

/*===
whitespace strip test
321.4
NaN
NaN
===*/

/* White space trimming. */

print('whitespace strip test');

function whiteSpaceStripTest() {
    var t = [];
    var i;
    var txt;

    // a simple test with only ASCII whitespace
    txt = '\u0009\u000b\u000c\u0020\u00a0\u000a\u000d321.4';
    print(g.parseFloat(txt));

    // txt will contain every whitespace codepoint followed by the number
    for (i = 0; i < WHITESPACE_CODEPOINTS.length; i++) {
        t.push(String.fromCharCode(WHITESPACE_CODEPOINTS[i]));
    }
    t.push('123.4');
    txt = t.join('');
    print(g.parseFloat(txt));

    // try with trailing garbage
    print(g.parseFloat(txt + 'xyz'));
}

try {
    whiteSpaceStripTest();
} catch (e) {
    print(e.name);
}

/*===
trailing garbage
123
1230
1230
123.4
123.4
123.4
123.4
===*/

/* Trailing garbage is ignored. */

print('trailing garbage');

function trailingGarbageTest() {
    print(g.parseFloat('123xxx'));
    print(g.parseFloat('123e1'));
    print(g.parseFloat('123e1e2'));  // second 'e' is garbage

    print(g.parseFloat('123.4'));
    print(g.parseFloat('123.4.5'));  // second '.' is garbage

    print(g.parseFloat('123.4\u0000'));
    print(g.parseFloat('123.4\ufedc'));

    // FIXME
}

try {
    trailingGarbageTest();
} catch (e) {
    print(e.name);
}

/*===
infinity
number Infinity
number Infinity
number Infinity
number -Infinity
number NaN
number NaN
===*/

/* 'Infinity' is parsed; case sensitive.  Don't parse 'inf'. */

print('infinity');

function infinityTest() {
    var t;

    t = g.parseFloat('Infinity');
    print(typeof t, t);

    t = g.parseFloat('  InfinityXXX');
    print(typeof t, t);

    t = g.parseFloat('  +InfinityXXX');
    print(typeof t, t);

    t = g.parseFloat('  -InfinityXXX');
    print(typeof t, t);

    t = g.parseFloat('infinity');
    print(typeof t, t);

    t = g.parseFloat('inf');
    print(typeof t, t);
}

try {
    infinityTest();
} catch (e) {
    print(e.name);
}

/* Leading plus/minus sign is accepted. */

/*===
hex/oct
number 0
number 0
number 0
number 0
number 77
number 88
number 99
===*/

/* Hex/oct is not accepted.
 *
 * If a number begins with '0x' or '0X' it gets parsed as a zero.  The 'x'/'X'
 * character will be considered garbage and terminates the number.
 *
 * If a number has leading zeroes, they will be accepted as part of the decimal
 * value.  StrDecimalLiteral (unlike DecimalLiteral) accepts leading zeroes.
 */

print('hex/oct');

function hexOctTest() {
    var t;

    t = g.parseFloat('0x1234');
    print(typeof t, t);

    t = g.parseFloat('0xcafe');
    print(typeof t, t);

    t = g.parseFloat('0X1234');
    print(typeof t, t);

    t = g.parseFloat('0Xcafe');
    print(typeof t, t);

    t = g.parseFloat('077');
    print(typeof t, t);

    t = g.parseFloat('088');
    print(typeof t, t);

    t = g.parseFloat('099');
    print(typeof t, t);
}

try {
    hexOctTest();
} catch (e) {
    print(e.name);
}

/*===
exactness
0 1 1 true
1 2 2 true
2 4 4 true
3 8 8 true
4 16 16 true
5 32 32 true
6 64 64 true
7 128 128 true
8 256 256 true
9 512 512 true
10 1024 1024 true
11 2048 2048 true
12 4096 4096 true
13 8192 8192 true
14 16384 16384 true
15 32768 32768 true
16 65536 65536 true
17 131072 131072 true
18 262144 262144 true
19 524288 524288 true
20 1048576 1048576 true
21 2097152 2097152 true
22 4194304 4194304 true
23 8388608 8388608 true
24 16777216 16777216 true
25 33554432 33554432 true
26 67108864 67108864 true
27 134217728 134217728 true
28 268435456 268435456 true
29 536870912 536870912 true
30 1073741824 1073741824 true
31 2147483648 2147483648 true
32 4294967296 4294967296 true
33 8589934592 8589934592 true
34 17179869184 17179869184 true
35 34359738368 34359738368 true
36 68719476736 68719476736 true
37 137438953472 137438953472 true
38 274877906944 274877906944 true
39 549755813888 549755813888 true
40 1099511627776 1099511627776 true
41 2199023255552 2199023255552 true
42 4398046511104 4398046511104 true
43 8796093022208 8796093022208 true
44 17592186044416 17592186044416 true
45 35184372088832 35184372088832 true
46 70368744177664 70368744177664 true
47 140737488355328 140737488355328 true
48 281474976710656 281474976710656 true
49 562949953421312 562949953421312 true
50 1125899906842624 1125899906842624 true
51 2251799813685248 2251799813685248 true
52 4503599627370496 4503599627370496 true
53 9007199254740992 9007199254740992 true
54 18014398509481984 18014398509481984 true
55 36028797018963970 36028797018963970 true
56 72057594037927940 72057594037927940 true
57 144115188075855870 144115188075855870 true
58 288230376151711740 288230376151711740 true
59 576460752303423500 576460752303423500 true
60 1152921504606847000 1152921504606847000 true
61 2305843009213694000 2305843009213694000 true
62 4611686018427388000 4611686018427388000 true
63 9223372036854776000 9223372036854776000 true
64 18446744073709552000 18446744073709552000 true
65 36893488147419103000 36893488147419103000 true
66 73786976294838210000 73786976294838210000 true
67 147573952589676410000 147573952589676410000 true
68 295147905179352830000 295147905179352830000 true
69 590295810358705700000 590295810358705700000 true
70 1.1805916207174113e+21 1.1805916207174113e+21 true
71 2.3611832414348226e+21 2.3611832414348226e+21 true
72 4.722366482869645e+21 4.722366482869645e+21 true
73 9.44473296573929e+21 9.44473296573929e+21 true
74 1.888946593147858e+22 1.888946593147858e+22 true
75 3.777893186295716e+22 3.777893186295716e+22 true
76 7.555786372591432e+22 7.555786372591432e+22 true
77 1.5111572745182865e+23 1.5111572745182865e+23 true
78 3.022314549036573e+23 3.022314549036573e+23 true
79 6.044629098073146e+23 6.044629098073146e+23 true
80 1.2089258196146292e+24 1.2089258196146292e+24 true
81 2.4178516392292583e+24 2.4178516392292583e+24 true
82 4.835703278458517e+24 4.835703278458517e+24 true
83 9.671406556917033e+24 9.671406556917033e+24 true
84 1.9342813113834067e+25 1.9342813113834067e+25 true
85 3.8685626227668134e+25 3.8685626227668134e+25 true
86 7.737125245533627e+25 7.737125245533627e+25 true
87 1.5474250491067253e+26 1.5474250491067253e+26 true
88 3.094850098213451e+26 3.094850098213451e+26 true
89 6.189700196426902e+26 6.189700196426902e+26 true
90 1.2379400392853803e+27 1.2379400392853803e+27 true
91 2.4758800785707605e+27 2.4758800785707605e+27 true
92 4.951760157141521e+27 4.951760157141521e+27 true
93 9.903520314283042e+27 9.903520314283042e+27 true
94 1.9807040628566084e+28 1.9807040628566084e+28 true
95 3.961408125713217e+28 3.961408125713217e+28 true
96 7.922816251426434e+28 7.922816251426434e+28 true
97 1.5845632502852868e+29 1.5845632502852868e+29 true
98 3.1691265005705735e+29 3.1691265005705735e+29 true
99 6.338253001141147e+29 6.338253001141147e+29 true
100 1.2676506002282294e+30 1.2676506002282294e+30 true
101 2.535301200456459e+30 2.535301200456459e+30 true
102 5.070602400912918e+30 5.070602400912918e+30 true
103 1.0141204801825835e+31 1.0141204801825835e+31 true
104 2.028240960365167e+31 2.028240960365167e+31 true
105 4.056481920730334e+31 4.056481920730334e+31 true
106 8.112963841460668e+31 8.112963841460668e+31 true
107 1.6225927682921336e+32 1.6225927682921336e+32 true
108 3.2451855365842673e+32 3.2451855365842673e+32 true
109 6.490371073168535e+32 6.490371073168535e+32 true
110 1.298074214633707e+33 1.298074214633707e+33 true
111 2.596148429267414e+33 2.596148429267414e+33 true
112 5.192296858534828e+33 5.192296858534828e+33 true
113 1.0384593717069655e+34 1.0384593717069655e+34 true
114 2.076918743413931e+34 2.076918743413931e+34 true
115 4.153837486827862e+34 4.153837486827862e+34 true
116 8.307674973655724e+34 8.307674973655724e+34 true
117 1.661534994731145e+35 1.661534994731145e+35 true
118 3.32306998946229e+35 3.32306998946229e+35 true
119 6.64613997892458e+35 6.64613997892458e+35 true
120 1.329227995784916e+36 1.329227995784916e+36 true
121 2.658455991569832e+36 2.658455991569832e+36 true
122 5.316911983139664e+36 5.316911983139664e+36 true
123 1.0633823966279327e+37 1.0633823966279327e+37 true
124 2.1267647932558654e+37 2.1267647932558654e+37 true
125 4.253529586511731e+37 4.253529586511731e+37 true
126 8.507059173023462e+37 8.507059173023462e+37 true
127 1.7014118346046923e+38 1.7014118346046923e+38 true
128 3.402823669209385e+38 3.402823669209385e+38 true
129 6.80564733841877e+38 6.80564733841877e+38 true
130 1.361129467683754e+39 1.361129467683754e+39 true
131 2.722258935367508e+39 2.722258935367508e+39 true
132 5.444517870735016e+39 5.444517870735016e+39 true
133 1.0889035741470031e+40 1.0889035741470031e+40 true
134 2.1778071482940062e+40 2.1778071482940062e+40 true
135 4.3556142965880123e+40 4.3556142965880123e+40 true
136 8.711228593176025e+40 8.711228593176025e+40 true
137 1.742245718635205e+41 1.742245718635205e+41 true
138 3.48449143727041e+41 3.48449143727041e+41 true
139 6.96898287454082e+41 6.96898287454082e+41 true
140 1.393796574908164e+42 1.393796574908164e+42 true
141 2.787593149816328e+42 2.787593149816328e+42 true
142 5.575186299632656e+42 5.575186299632656e+42 true
143 1.1150372599265312e+43 1.1150372599265312e+43 true
144 2.2300745198530623e+43 2.2300745198530623e+43 true
145 4.460149039706125e+43 4.460149039706125e+43 true
146 8.92029807941225e+43 8.92029807941225e+43 true
147 1.78405961588245e+44 1.78405961588245e+44 true
148 3.5681192317649e+44 3.5681192317649e+44 true
149 7.1362384635298e+44 7.1362384635298e+44 true
150 1.42724769270596e+45 1.42724769270596e+45 true
151 2.85449538541192e+45 2.85449538541192e+45 true
152 5.70899077082384e+45 5.70899077082384e+45 true
153 1.141798154164768e+46 1.141798154164768e+46 true
154 2.283596308329536e+46 2.283596308329536e+46 true
155 4.567192616659072e+46 4.567192616659072e+46 true
156 9.134385233318143e+46 9.134385233318143e+46 true
157 1.8268770466636286e+47 1.8268770466636286e+47 true
158 3.6537540933272573e+47 3.6537540933272573e+47 true
159 7.307508186654515e+47 7.307508186654515e+47 true
160 1.461501637330903e+48 1.461501637330903e+48 true
161 2.923003274661806e+48 2.923003274661806e+48 true
162 5.846006549323612e+48 5.846006549323612e+48 true
163 1.1692013098647223e+49 1.1692013098647223e+49 true
164 2.3384026197294447e+49 2.3384026197294447e+49 true
165 4.6768052394588893e+49 4.6768052394588893e+49 true
166 9.353610478917779e+49 9.353610478917779e+49 true
167 1.8707220957835557e+50 1.8707220957835557e+50 true
168 3.7414441915671115e+50 3.7414441915671115e+50 true
169 7.482888383134223e+50 7.482888383134223e+50 true
170 1.4965776766268446e+51 1.4965776766268446e+51 true
171 2.9931553532536892e+51 2.9931553532536892e+51 true
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469 1.5242912843339806e+141 1.5242912843339806e+141 true
470 3.048582568667961e+141 3.048582568667961e+141 true
471 6.097165137335922e+141 6.097165137335922e+141 true
472 1.2194330274671845e+142 1.2194330274671845e+142 true
473 2.438866054934369e+142 2.438866054934369e+142 true
474 4.877732109868738e+142 4.877732109868738e+142 true
475 9.755464219737476e+142 9.755464219737476e+142 true
476 1.9510928439474951e+143 1.9510928439474951e+143 true
477 3.9021856878949903e+143 3.9021856878949903e+143 true
478 7.804371375789981e+143 7.804371375789981e+143 true
479 1.5608742751579961e+144 1.5608742751579961e+144 true
480 3.1217485503159922e+144 3.1217485503159922e+144 true
481 6.243497100631985e+144 6.243497100631985e+144 true
482 1.248699420126397e+145 1.248699420126397e+145 true
483 2.497398840252794e+145 2.497398840252794e+145 true
484 4.994797680505588e+145 4.994797680505588e+145 true
485 9.989595361011175e+145 9.989595361011175e+145 true
486 1.997919072202235e+146 1.997919072202235e+146 true
487 3.99583814440447e+146 3.99583814440447e+146 true
488 7.99167628880894e+146 7.99167628880894e+146 true
489 1.598335257761788e+147 1.598335257761788e+147 true
490 3.196670515523576e+147 3.196670515523576e+147 true
491 6.393341031047152e+147 6.393341031047152e+147 true
492 1.2786682062094304e+148 1.2786682062094304e+148 true
493 2.557336412418861e+148 2.557336412418861e+148 true
494 5.114672824837722e+148 5.114672824837722e+148 true
495 1.0229345649675443e+149 1.0229345649675443e+149 true
496 2.0458691299350887e+149 2.0458691299350887e+149 true
497 4.0917382598701773e+149 4.0917382598701773e+149 true
498 8.183476519740355e+149 8.183476519740355e+149 true
499 1.636695303948071e+150 1.636695303948071e+150 true
500 3.273390607896142e+150 3.273390607896142e+150 true
501 6.546781215792284e+150 6.546781215792284e+150 true
502 1.3093562431584567e+151 1.3093562431584567e+151 true
503 2.6187124863169135e+151 2.6187124863169135e+151 true
504 5.237424972633827e+151 5.237424972633827e+151 true
505 1.0474849945267654e+152 1.0474849945267654e+152 true
506 2.094969989053531e+152 2.094969989053531e+152 true
507 4.189939978107062e+152 4.189939978107062e+152 true
508 8.379879956214123e+152 8.379879956214123e+152 true
509 1.6759759912428246e+153 1.6759759912428246e+153 true
510 3.3519519824856493e+153 3.3519519824856493e+153 true
511 6.703903964971299e+153 6.703903964971299e+153 true
512 1.3407807929942597e+154 1.3407807929942597e+154 true
===*/

/* Exactness tests.  Floating point value parsing is required to be bit
 * exact.
 *
 * How to test for exact numbers?  Base 2 operations are easy to rely on
 * being correct (even parseInt()) so we can create comparison values in
 * many cases that way.
 */

print('exactness');

/*
# repr() apparently ensures enough decimals are printed to guarantee
# exact reconstruction of IEEE double
print('[');
for i in xrange(512+1):
  v1 = 2**i     # exact in python
  v2 = float(v1)
  print('{ exp: %d, dbl: "%r" },' % (i, v2))

print(']');
*/

function exactnessTest() {
    var two_to_n = [
        { exp: 0, dbl: "1.0" },
        { exp: 1, dbl: "2.0" },
        { exp: 2, dbl: "4.0" },
        { exp: 3, dbl: "8.0" },
        { exp: 4, dbl: "16.0" },
        { exp: 5, dbl: "32.0" },
        { exp: 6, dbl: "64.0" },
        { exp: 7, dbl: "128.0" },
        { exp: 8, dbl: "256.0" },
        { exp: 9, dbl: "512.0" },
        { exp: 10, dbl: "1024.0" },
        { exp: 11, dbl: "2048.0" },
        { exp: 12, dbl: "4096.0" },
        { exp: 13, dbl: "8192.0" },
        { exp: 14, dbl: "16384.0" },
        { exp: 15, dbl: "32768.0" },
        { exp: 16, dbl: "65536.0" },
        { exp: 17, dbl: "131072.0" },
        { exp: 18, dbl: "262144.0" },
        { exp: 19, dbl: "524288.0" },
        { exp: 20, dbl: "1048576.0" },
        { exp: 21, dbl: "2097152.0" },
        { exp: 22, dbl: "4194304.0" },
        { exp: 23, dbl: "8388608.0" },
        { exp: 24, dbl: "16777216.0" },
        { exp: 25, dbl: "33554432.0" },
        { exp: 26, dbl: "67108864.0" },
        { exp: 27, dbl: "134217728.0" },
        { exp: 28, dbl: "268435456.0" },
        { exp: 29, dbl: "536870912.0" },
        { exp: 30, dbl: "1073741824.0" },
        { exp: 31, dbl: "2147483648.0" },
        { exp: 32, dbl: "4294967296.0" },
        { exp: 33, dbl: "8589934592.0" },
        { exp: 34, dbl: "17179869184.0" },
        { exp: 35, dbl: "34359738368.0" },
        { exp: 36, dbl: "68719476736.0" },
        { exp: 37, dbl: "137438953472.0" },
        { exp: 38, dbl: "274877906944.0" },
        { exp: 39, dbl: "549755813888.0" },
        { exp: 40, dbl: "1099511627776.0" },
        { exp: 41, dbl: "2199023255552.0" },
        { exp: 42, dbl: "4398046511104.0" },
        { exp: 43, dbl: "8796093022208.0" },
        { exp: 44, dbl: "17592186044416.0" },
        { exp: 45, dbl: "35184372088832.0" },
        { exp: 46, dbl: "70368744177664.0" },
        { exp: 47, dbl: "140737488355328.0" },
        { exp: 48, dbl: "281474976710656.0" },
        { exp: 49, dbl: "562949953421312.0" },
        { exp: 50, dbl: "1125899906842624.0" },
        { exp: 51, dbl: "2251799813685248.0" },
        { exp: 52, dbl: "4503599627370496.0" },
        { exp: 53, dbl: "9007199254740992.0" },
        { exp: 54, dbl: "1.8014398509481984e+16" },
        { exp: 55, dbl: "3.602879701896397e+16" },
        { exp: 56, dbl: "7.205759403792794e+16" },
        { exp: 57, dbl: "1.4411518807585587e+17" },
        { exp: 58, dbl: "2.8823037615171174e+17" },
        { exp: 59, dbl: "5.764607523034235e+17" },
        { exp: 60, dbl: "1.152921504606847e+18" },
        { exp: 61, dbl: "2.305843009213694e+18" },
        { exp: 62, dbl: "4.611686018427388e+18" },
        { exp: 63, dbl: "9.223372036854776e+18" },
        { exp: 64, dbl: "1.8446744073709552e+19" },
        { exp: 65, dbl: "3.6893488147419103e+19" },
        { exp: 66, dbl: "7.378697629483821e+19" },
        { exp: 67, dbl: "1.4757395258967641e+20" },
        { exp: 68, dbl: "2.9514790517935283e+20" },
        { exp: 69, dbl: "5.902958103587057e+20" },
        { exp: 70, dbl: "1.1805916207174113e+21" },
        { exp: 71, dbl: "2.3611832414348226e+21" },
        { exp: 72, dbl: "4.722366482869645e+21" },
        { exp: 73, dbl: "9.44473296573929e+21" },
        { exp: 74, dbl: "1.888946593147858e+22" },
        { exp: 75, dbl: "3.777893186295716e+22" },
        { exp: 76, dbl: "7.555786372591432e+22" },
        { exp: 77, dbl: "1.5111572745182865e+23" },
        { exp: 78, dbl: "3.022314549036573e+23" },
        { exp: 79, dbl: "6.044629098073146e+23" },
        { exp: 80, dbl: "1.2089258196146292e+24" },
        { exp: 81, dbl: "2.4178516392292583e+24" },
        { exp: 82, dbl: "4.835703278458517e+24" },
        { exp: 83, dbl: "9.671406556917033e+24" },
        { exp: 84, dbl: "1.9342813113834067e+25" },
        { exp: 85, dbl: "3.8685626227668134e+25" },
        { exp: 86, dbl: "7.737125245533627e+25" },
        { exp: 87, dbl: "1.5474250491067253e+26" },
        { exp: 88, dbl: "3.094850098213451e+26" },
        { exp: 89, dbl: "6.189700196426902e+26" },
        { exp: 90, dbl: "1.2379400392853803e+27" },
        { exp: 91, dbl: "2.4758800785707605e+27" },
        { exp: 92, dbl: "4.951760157141521e+27" },
        { exp: 93, dbl: "9.903520314283042e+27" },
        { exp: 94, dbl: "1.9807040628566084e+28" },
        { exp: 95, dbl: "3.961408125713217e+28" },
        { exp: 96, dbl: "7.922816251426434e+28" },
        { exp: 97, dbl: "1.5845632502852868e+29" },
        { exp: 98, dbl: "3.1691265005705735e+29" },
        { exp: 99, dbl: "6.338253001141147e+29" },
        { exp: 100, dbl: "1.2676506002282294e+30" },
        { exp: 101, dbl: "2.535301200456459e+30" },
        { exp: 102, dbl: "5.070602400912918e+30" },
        { exp: 103, dbl: "1.0141204801825835e+31" },
        { exp: 104, dbl: "2.028240960365167e+31" },
        { exp: 105, dbl: "4.056481920730334e+31" },
        { exp: 106, dbl: "8.112963841460668e+31" },
        { exp: 107, dbl: "1.6225927682921336e+32" },
        { exp: 108, dbl: "3.2451855365842673e+32" },
        { exp: 109, dbl: "6.490371073168535e+32" },
        { exp: 110, dbl: "1.298074214633707e+33" },
        { exp: 111, dbl: "2.596148429267414e+33" },
        { exp: 112, dbl: "5.192296858534828e+33" },
        { exp: 113, dbl: "1.0384593717069655e+34" },
        { exp: 114, dbl: "2.076918743413931e+34" },
        { exp: 115, dbl: "4.153837486827862e+34" },
        { exp: 116, dbl: "8.307674973655724e+34" },
        { exp: 117, dbl: "1.661534994731145e+35" },
        { exp: 118, dbl: "3.32306998946229e+35" },
        { exp: 119, dbl: "6.64613997892458e+35" },
        { exp: 120, dbl: "1.329227995784916e+36" },
        { exp: 121, dbl: "2.658455991569832e+36" },
        { exp: 122, dbl: "5.316911983139664e+36" },
        { exp: 123, dbl: "1.0633823966279327e+37" },
        { exp: 124, dbl: "2.1267647932558654e+37" },
        { exp: 125, dbl: "4.253529586511731e+37" },
        { exp: 126, dbl: "8.507059173023462e+37" },
        { exp: 127, dbl: "1.7014118346046923e+38" },
        { exp: 128, dbl: "3.402823669209385e+38" },
        { exp: 129, dbl: "6.80564733841877e+38" },
        { exp: 130, dbl: "1.361129467683754e+39" },
        { exp: 131, dbl: "2.722258935367508e+39" },
        { exp: 132, dbl: "5.444517870735016e+39" },
        { exp: 133, dbl: "1.0889035741470031e+40" },
        { exp: 134, dbl: "2.1778071482940062e+40" },
        { exp: 135, dbl: "4.3556142965880123e+40" },
        { exp: 136, dbl: "8.711228593176025e+40" },
        { exp: 137, dbl: "1.742245718635205e+41" },
        { exp: 138, dbl: "3.48449143727041e+41" },
        { exp: 139, dbl: "6.96898287454082e+41" },
        { exp: 140, dbl: "1.393796574908164e+42" },
        { exp: 141, dbl: "2.787593149816328e+42" },
        { exp: 142, dbl: "5.575186299632656e+42" },
        { exp: 143, dbl: "1.1150372599265312e+43" },
        { exp: 144, dbl: "2.2300745198530623e+43" },
        { exp: 145, dbl: "4.460149039706125e+43" },
        { exp: 146, dbl: "8.92029807941225e+43" },
        { exp: 147, dbl: "1.78405961588245e+44" },
        { exp: 148, dbl: "3.5681192317649e+44" },
        { exp: 149, dbl: "7.1362384635298e+44" },
        { exp: 150, dbl: "1.42724769270596e+45" },
        { exp: 151, dbl: "2.85449538541192e+45" },
        { exp: 152, dbl: "5.70899077082384e+45" },
        { exp: 153, dbl: "1.141798154164768e+46" },
        { exp: 154, dbl: "2.283596308329536e+46" },
        { exp: 155, dbl: "4.567192616659072e+46" },
        { exp: 156, dbl: "9.134385233318143e+46" },
        { exp: 157, dbl: "1.8268770466636286e+47" },
        { exp: 158, dbl: "3.6537540933272573e+47" },
        { exp: 159, dbl: "7.307508186654515e+47" },
        { exp: 160, dbl: "1.461501637330903e+48" },
        { exp: 161, dbl: "2.923003274661806e+48" },
        { exp: 162, dbl: "5.846006549323612e+48" },
        { exp: 163, dbl: "1.1692013098647223e+49" },
        { exp: 164, dbl: "2.3384026197294447e+49" },
        { exp: 165, dbl: "4.6768052394588893e+49" },
        { exp: 166, dbl: "9.353610478917779e+49" },
        { exp: 167, dbl: "1.8707220957835557e+50" },
        { exp: 168, dbl: "3.7414441915671115e+50" },
        { exp: 169, dbl: "7.482888383134223e+50" },
        { exp: 170, dbl: "1.4965776766268446e+51" },
        { exp: 171, dbl: "2.9931553532536892e+51" },
        { exp: 172, dbl: "5.986310706507379e+51" },
        { exp: 173, dbl: "1.1972621413014757e+52" },
        { exp: 174, dbl: "2.3945242826029513e+52" },
        { exp: 175, dbl: "4.789048565205903e+52" },
        { exp: 176, dbl: "9.578097130411805e+52" },
        { exp: 177, dbl: "1.915619426082361e+53" },
        { exp: 178, dbl: "3.831238852164722e+53" },
        { exp: 179, dbl: "7.662477704329444e+53" },
        { exp: 180, dbl: "1.532495540865889e+54" },
        { exp: 181, dbl: "3.064991081731778e+54" },
        { exp: 182, dbl: "6.129982163463556e+54" },
        { exp: 183, dbl: "1.2259964326927111e+55" },
        { exp: 184, dbl: "2.4519928653854222e+55" },
        { exp: 185, dbl: "4.9039857307708443e+55" },
        { exp: 186, dbl: "9.807971461541689e+55" },
        { exp: 187, dbl: "1.9615942923083377e+56" },
        { exp: 188, dbl: "3.9231885846166755e+56" },
        { exp: 189, dbl: "7.846377169233351e+56" },
        { exp: 190, dbl: "1.5692754338466702e+57" },
        { exp: 191, dbl: "3.1385508676933404e+57" },
        { exp: 192, dbl: "6.277101735386681e+57" },
        { exp: 193, dbl: "1.2554203470773362e+58" },
        { exp: 194, dbl: "2.5108406941546723e+58" },
        { exp: 195, dbl: "5.021681388309345e+58" },
        { exp: 196, dbl: "1.004336277661869e+59" },
        { exp: 197, dbl: "2.008672555323738e+59" },
        { exp: 198, dbl: "4.017345110647476e+59" },
        { exp: 199, dbl: "8.034690221294951e+59" },
        { exp: 200, dbl: "1.6069380442589903e+60" },
        { exp: 201, dbl: "3.2138760885179806e+60" },
        { exp: 202, dbl: "6.427752177035961e+60" },
        { exp: 203, dbl: "1.2855504354071922e+61" },
        { exp: 204, dbl: "2.5711008708143844e+61" },
        { exp: 205, dbl: "5.142201741628769e+61" },
        { exp: 206, dbl: "1.0284403483257538e+62" },
        { exp: 207, dbl: "2.0568806966515076e+62" },
        { exp: 208, dbl: "4.113761393303015e+62" },
        { exp: 209, dbl: "8.22752278660603e+62" },
        { exp: 210, dbl: "1.645504557321206e+63" },
        { exp: 211, dbl: "3.291009114642412e+63" },
        { exp: 212, dbl: "6.582018229284824e+63" },
        { exp: 213, dbl: "1.3164036458569648e+64" },
        { exp: 214, dbl: "2.6328072917139297e+64" },
        { exp: 215, dbl: "5.2656145834278593e+64" },
        { exp: 216, dbl: "1.0531229166855719e+65" },
        { exp: 217, dbl: "2.1062458333711437e+65" },
        { exp: 218, dbl: "4.2124916667422875e+65" },
        { exp: 219, dbl: "8.424983333484575e+65" },
        { exp: 220, dbl: "1.684996666696915e+66" },
        { exp: 221, dbl: "3.36999333339383e+66" },
        { exp: 222, dbl: "6.73998666678766e+66" },
        { exp: 223, dbl: "1.347997333357532e+67" },
        { exp: 224, dbl: "2.695994666715064e+67" },
        { exp: 225, dbl: "5.391989333430128e+67" },
        { exp: 226, dbl: "1.0783978666860256e+68" },
        { exp: 227, dbl: "2.1567957333720512e+68" },
        { exp: 228, dbl: "4.3135914667441024e+68" },
        { exp: 229, dbl: "8.627182933488205e+68" },
        { exp: 230, dbl: "1.725436586697641e+69" },
        { exp: 231, dbl: "3.450873173395282e+69" },
        { exp: 232, dbl: "6.901746346790564e+69" },
        { exp: 233, dbl: "1.3803492693581128e+70" },
        { exp: 234, dbl: "2.7606985387162255e+70" },
        { exp: 235, dbl: "5.521397077432451e+70" },
        { exp: 236, dbl: "1.1042794154864902e+71" },
        { exp: 237, dbl: "2.2085588309729804e+71" },
        { exp: 238, dbl: "4.417117661945961e+71" },
        { exp: 239, dbl: "8.834235323891922e+71" },
        { exp: 240, dbl: "1.7668470647783843e+72" },
        { exp: 241, dbl: "3.533694129556769e+72" },
        { exp: 242, dbl: "7.067388259113537e+72" },
        { exp: 243, dbl: "1.4134776518227075e+73" },
        { exp: 244, dbl: "2.826955303645415e+73" },
        { exp: 245, dbl: "5.65391060729083e+73" },
        { exp: 246, dbl: "1.130782121458166e+74" },
        { exp: 247, dbl: "2.261564242916332e+74" },
        { exp: 248, dbl: "4.523128485832664e+74" },
        { exp: 249, dbl: "9.046256971665328e+74" },
        { exp: 250, dbl: "1.8092513943330656e+75" },
        { exp: 251, dbl: "3.618502788666131e+75" },
        { exp: 252, dbl: "7.237005577332262e+75" },
        { exp: 253, dbl: "1.4474011154664524e+76" },
        { exp: 254, dbl: "2.894802230932905e+76" },
        { exp: 255, dbl: "5.78960446186581e+76" },
        { exp: 256, dbl: "1.157920892373162e+77" },
        { exp: 257, dbl: "2.315841784746324e+77" },
        { exp: 258, dbl: "4.631683569492648e+77" },
        { exp: 259, dbl: "9.263367138985296e+77" },
        { exp: 260, dbl: "1.8526734277970591e+78" },
        { exp: 261, dbl: "3.7053468555941183e+78" },
        { exp: 262, dbl: "7.410693711188237e+78" },
        { exp: 263, dbl: "1.4821387422376473e+79" },
        { exp: 264, dbl: "2.9642774844752946e+79" },
        { exp: 265, dbl: "5.928554968950589e+79" },
        { exp: 266, dbl: "1.1857109937901178e+80" },
        { exp: 267, dbl: "2.3714219875802357e+80" },
        { exp: 268, dbl: "4.7428439751604714e+80" },
        { exp: 269, dbl: "9.485687950320943e+80" },
        { exp: 270, dbl: "1.8971375900641885e+81" },
        { exp: 271, dbl: "3.794275180128377e+81" },
        { exp: 272, dbl: "7.588550360256754e+81" },
        { exp: 273, dbl: "1.517710072051351e+82" },
        { exp: 274, dbl: "3.035420144102702e+82" },
        { exp: 275, dbl: "6.070840288205404e+82" },
        { exp: 276, dbl: "1.2141680576410807e+83" },
        { exp: 277, dbl: "2.4283361152821613e+83" },
        { exp: 278, dbl: "4.856672230564323e+83" },
        { exp: 279, dbl: "9.713344461128645e+83" },
        { exp: 280, dbl: "1.942668892225729e+84" },
        { exp: 281, dbl: "3.885337784451458e+84" },
        { exp: 282, dbl: "7.770675568902916e+84" },
        { exp: 283, dbl: "1.5541351137805833e+85" },
        { exp: 284, dbl: "3.1082702275611665e+85" },
        { exp: 285, dbl: "6.216540455122333e+85" },
        { exp: 286, dbl: "1.2433080910244666e+86" },
        { exp: 287, dbl: "2.4866161820489332e+86" },
        { exp: 288, dbl: "4.9732323640978664e+86" },
        { exp: 289, dbl: "9.946464728195733e+86" },
        { exp: 290, dbl: "1.9892929456391466e+87" },
        { exp: 291, dbl: "3.978585891278293e+87" },
        { exp: 292, dbl: "7.957171782556586e+87" },
        { exp: 293, dbl: "1.5914343565113173e+88" },
        { exp: 294, dbl: "3.1828687130226345e+88" },
        { exp: 295, dbl: "6.365737426045269e+88" },
        { exp: 296, dbl: "1.2731474852090538e+89" },
        { exp: 297, dbl: "2.5462949704181076e+89" },
        { exp: 298, dbl: "5.092589940836215e+89" },
        { exp: 299, dbl: "1.018517988167243e+90" },
        { exp: 300, dbl: "2.037035976334486e+90" },
        { exp: 301, dbl: "4.074071952668972e+90" },
        { exp: 302, dbl: "8.148143905337944e+90" },
        { exp: 303, dbl: "1.629628781067589e+91" },
        { exp: 304, dbl: "3.259257562135178e+91" },
        { exp: 305, dbl: "6.518515124270356e+91" },
        { exp: 306, dbl: "1.3037030248540711e+92" },
        { exp: 307, dbl: "2.6074060497081422e+92" },
        { exp: 308, dbl: "5.2148120994162844e+92" },
        { exp: 309, dbl: "1.0429624198832569e+93" },
        { exp: 310, dbl: "2.0859248397665138e+93" },
        { exp: 311, dbl: "4.1718496795330275e+93" },
        { exp: 312, dbl: "8.343699359066055e+93" },
        { exp: 313, dbl: "1.668739871813211e+94" },
        { exp: 314, dbl: "3.337479743626422e+94" },
        { exp: 315, dbl: "6.674959487252844e+94" },
        { exp: 316, dbl: "1.3349918974505688e+95" },
        { exp: 317, dbl: "2.6699837949011376e+95" },
        { exp: 318, dbl: "5.339967589802275e+95" },
        { exp: 319, dbl: "1.067993517960455e+96" },
        { exp: 320, dbl: "2.13598703592091e+96" },
        { exp: 321, dbl: "4.27197407184182e+96" },
        { exp: 322, dbl: "8.54394814368364e+96" },
        { exp: 323, dbl: "1.708789628736728e+97" },
        { exp: 324, dbl: "3.417579257473456e+97" },
        { exp: 325, dbl: "6.835158514946912e+97" },
        { exp: 326, dbl: "1.3670317029893825e+98" },
        { exp: 327, dbl: "2.734063405978765e+98" },
        { exp: 328, dbl: "5.46812681195753e+98" },
        { exp: 329, dbl: "1.093625362391506e+99" },
        { exp: 330, dbl: "2.187250724783012e+99" },
        { exp: 331, dbl: "4.374501449566024e+99" },
        { exp: 332, dbl: "8.749002899132048e+99" },
        { exp: 333, dbl: "1.7498005798264095e+100" },
        { exp: 334, dbl: "3.499601159652819e+100" },
        { exp: 335, dbl: "6.999202319305638e+100" },
        { exp: 336, dbl: "1.3998404638611276e+101" },
        { exp: 337, dbl: "2.7996809277222553e+101" },
        { exp: 338, dbl: "5.599361855444511e+101" },
        { exp: 339, dbl: "1.1198723710889021e+102" },
        { exp: 340, dbl: "2.2397447421778042e+102" },
        { exp: 341, dbl: "4.4794894843556084e+102" },
        { exp: 342, dbl: "8.958978968711217e+102" },
        { exp: 343, dbl: "1.7917957937422434e+103" },
        { exp: 344, dbl: "3.583591587484487e+103" },
        { exp: 345, dbl: "7.167183174968974e+103" },
        { exp: 346, dbl: "1.4334366349937947e+104" },
        { exp: 347, dbl: "2.8668732699875894e+104" },
        { exp: 348, dbl: "5.733746539975179e+104" },
        { exp: 349, dbl: "1.1467493079950358e+105" },
        { exp: 350, dbl: "2.2934986159900715e+105" },
        { exp: 351, dbl: "4.586997231980143e+105" },
        { exp: 352, dbl: "9.173994463960286e+105" },
        { exp: 353, dbl: "1.8347988927920572e+106" },
        { exp: 354, dbl: "3.6695977855841144e+106" },
        { exp: 355, dbl: "7.339195571168229e+106" },
        { exp: 356, dbl: "1.4678391142336458e+107" },
        { exp: 357, dbl: "2.9356782284672915e+107" },
        { exp: 358, dbl: "5.871356456934583e+107" },
        { exp: 359, dbl: "1.1742712913869166e+108" },
        { exp: 360, dbl: "2.3485425827738332e+108" },
        { exp: 361, dbl: "4.6970851655476665e+108" },
        { exp: 362, dbl: "9.394170331095333e+108" },
        { exp: 363, dbl: "1.8788340662190666e+109" },
        { exp: 364, dbl: "3.757668132438133e+109" },
        { exp: 365, dbl: "7.515336264876266e+109" },
        { exp: 366, dbl: "1.5030672529752533e+110" },
        { exp: 367, dbl: "3.0061345059505065e+110" },
        { exp: 368, dbl: "6.012269011901013e+110" },
        { exp: 369, dbl: "1.2024538023802026e+111" },
        { exp: 370, dbl: "2.4049076047604052e+111" },
        { exp: 371, dbl: "4.8098152095208105e+111" },
        { exp: 372, dbl: "9.619630419041621e+111" },
        { exp: 373, dbl: "1.9239260838083242e+112" },
        { exp: 374, dbl: "3.8478521676166484e+112" },
        { exp: 375, dbl: "7.695704335233297e+112" },
        { exp: 376, dbl: "1.5391408670466593e+113" },
        { exp: 377, dbl: "3.078281734093319e+113" },
        { exp: 378, dbl: "6.156563468186638e+113" },
        { exp: 379, dbl: "1.2313126936373275e+114" },
        { exp: 380, dbl: "2.462625387274655e+114" },
        { exp: 381, dbl: "4.92525077454931e+114" },
        { exp: 382, dbl: "9.85050154909862e+114" },
        { exp: 383, dbl: "1.970100309819724e+115" },
        { exp: 384, dbl: "3.940200619639448e+115" },
        { exp: 385, dbl: "7.880401239278896e+115" },
        { exp: 386, dbl: "1.5760802478557792e+116" },
        { exp: 387, dbl: "3.1521604957115583e+116" },
        { exp: 388, dbl: "6.304320991423117e+116" },
        { exp: 389, dbl: "1.2608641982846233e+117" },
        { exp: 390, dbl: "2.5217283965692467e+117" },
        { exp: 391, dbl: "5.0434567931384933e+117" },
        { exp: 392, dbl: "1.0086913586276987e+118" },
        { exp: 393, dbl: "2.0173827172553973e+118" },
        { exp: 394, dbl: "4.034765434510795e+118" },
        { exp: 395, dbl: "8.06953086902159e+118" },
        { exp: 396, dbl: "1.613906173804318e+119" },
        { exp: 397, dbl: "3.227812347608636e+119" },
        { exp: 398, dbl: "6.455624695217272e+119" },
        { exp: 399, dbl: "1.2911249390434543e+120" },
        { exp: 400, dbl: "2.5822498780869086e+120" },
        { exp: 401, dbl: "5.164499756173817e+120" },
        { exp: 402, dbl: "1.0328999512347634e+121" },
        { exp: 403, dbl: "2.065799902469527e+121" },
        { exp: 404, dbl: "4.131599804939054e+121" },
        { exp: 405, dbl: "8.263199609878108e+121" },
        { exp: 406, dbl: "1.6526399219756215e+122" },
        { exp: 407, dbl: "3.305279843951243e+122" },
        { exp: 408, dbl: "6.610559687902486e+122" },
        { exp: 409, dbl: "1.3221119375804972e+123" },
        { exp: 410, dbl: "2.6442238751609944e+123" },
        { exp: 411, dbl: "5.288447750321989e+123" },
        { exp: 412, dbl: "1.0576895500643978e+124" },
        { exp: 413, dbl: "2.1153791001287955e+124" },
        { exp: 414, dbl: "4.230758200257591e+124" },
        { exp: 415, dbl: "8.461516400515182e+124" },
        { exp: 416, dbl: "1.6923032801030364e+125" },
        { exp: 417, dbl: "3.384606560206073e+125" },
        { exp: 418, dbl: "6.769213120412146e+125" },
        { exp: 419, dbl: "1.3538426240824291e+126" },
        { exp: 420, dbl: "2.7076852481648583e+126" },
        { exp: 421, dbl: "5.415370496329717e+126" },
        { exp: 422, dbl: "1.0830740992659433e+127" },
        { exp: 423, dbl: "2.1661481985318866e+127" },
        { exp: 424, dbl: "4.332296397063773e+127" },
        { exp: 425, dbl: "8.664592794127546e+127" },
        { exp: 426, dbl: "1.7329185588255093e+128" },
        { exp: 427, dbl: "3.4658371176510186e+128" },
        { exp: 428, dbl: "6.931674235302037e+128" },
        { exp: 429, dbl: "1.3863348470604074e+129" },
        { exp: 430, dbl: "2.772669694120815e+129" },
        { exp: 431, dbl: "5.54533938824163e+129" },
        { exp: 432, dbl: "1.109067877648326e+130" },
        { exp: 433, dbl: "2.218135755296652e+130" },
        { exp: 434, dbl: "4.436271510593304e+130" },
        { exp: 435, dbl: "8.872543021186608e+130" },
        { exp: 436, dbl: "1.7745086042373215e+131" },
        { exp: 437, dbl: "3.549017208474643e+131" },
        { exp: 438, dbl: "7.098034416949286e+131" },
        { exp: 439, dbl: "1.4196068833898572e+132" },
        { exp: 440, dbl: "2.8392137667797144e+132" },
        { exp: 441, dbl: "5.678427533559429e+132" },
        { exp: 442, dbl: "1.1356855067118858e+133" },
        { exp: 443, dbl: "2.2713710134237715e+133" },
        { exp: 444, dbl: "4.542742026847543e+133" },
        { exp: 445, dbl: "9.085484053695086e+133" },
        { exp: 446, dbl: "1.8170968107390172e+134" },
        { exp: 447, dbl: "3.6341936214780345e+134" },
        { exp: 448, dbl: "7.268387242956069e+134" },
        { exp: 449, dbl: "1.4536774485912138e+135" },
        { exp: 450, dbl: "2.9073548971824276e+135" },
        { exp: 451, dbl: "5.814709794364855e+135" },
        { exp: 452, dbl: "1.162941958872971e+136" },
        { exp: 453, dbl: "2.325883917745942e+136" },
        { exp: 454, dbl: "4.651767835491884e+136" },
        { exp: 455, dbl: "9.303535670983768e+136" },
        { exp: 456, dbl: "1.8607071341967536e+137" },
        { exp: 457, dbl: "3.7214142683935073e+137" },
        { exp: 458, dbl: "7.442828536787015e+137" },
        { exp: 459, dbl: "1.488565707357403e+138" },
        { exp: 460, dbl: "2.977131414714806e+138" },
        { exp: 461, dbl: "5.954262829429612e+138" },
        { exp: 462, dbl: "1.1908525658859223e+139" },
        { exp: 463, dbl: "2.3817051317718447e+139" },
        { exp: 464, dbl: "4.7634102635436893e+139" },
        { exp: 465, dbl: "9.526820527087379e+139" },
        { exp: 466, dbl: "1.9053641054174757e+140" },
        { exp: 467, dbl: "3.8107282108349515e+140" },
        { exp: 468, dbl: "7.621456421669903e+140" },
        { exp: 469, dbl: "1.5242912843339806e+141" },
        { exp: 470, dbl: "3.048582568667961e+141" },
        { exp: 471, dbl: "6.097165137335922e+141" },
        { exp: 472, dbl: "1.2194330274671845e+142" },
        { exp: 473, dbl: "2.438866054934369e+142" },
        { exp: 474, dbl: "4.877732109868738e+142" },
        { exp: 475, dbl: "9.755464219737476e+142" },
        { exp: 476, dbl: "1.9510928439474951e+143" },
        { exp: 477, dbl: "3.9021856878949903e+143" },
        { exp: 478, dbl: "7.804371375789981e+143" },
        { exp: 479, dbl: "1.5608742751579961e+144" },
        { exp: 480, dbl: "3.1217485503159922e+144" },
        { exp: 481, dbl: "6.243497100631985e+144" },
        { exp: 482, dbl: "1.248699420126397e+145" },
        { exp: 483, dbl: "2.497398840252794e+145" },
        { exp: 484, dbl: "4.994797680505588e+145" },
        { exp: 485, dbl: "9.989595361011175e+145" },
        { exp: 486, dbl: "1.997919072202235e+146" },
        { exp: 487, dbl: "3.99583814440447e+146" },
        { exp: 488, dbl: "7.99167628880894e+146" },
        { exp: 489, dbl: "1.598335257761788e+147" },
        { exp: 490, dbl: "3.196670515523576e+147" },
        { exp: 491, dbl: "6.393341031047152e+147" },
        { exp: 492, dbl: "1.2786682062094304e+148" },
        { exp: 493, dbl: "2.557336412418861e+148" },
        { exp: 494, dbl: "5.114672824837722e+148" },
        { exp: 495, dbl: "1.0229345649675443e+149" },
        { exp: 496, dbl: "2.0458691299350887e+149" },
        { exp: 497, dbl: "4.0917382598701773e+149" },
        { exp: 498, dbl: "8.183476519740355e+149" },
        { exp: 499, dbl: "1.636695303948071e+150" },
        { exp: 500, dbl: "3.273390607896142e+150" },
        { exp: 501, dbl: "6.546781215792284e+150" },
        { exp: 502, dbl: "1.3093562431584567e+151" },
        { exp: 503, dbl: "2.6187124863169135e+151" },
        { exp: 504, dbl: "5.237424972633827e+151" },
        { exp: 505, dbl: "1.0474849945267654e+152" },
        { exp: 506, dbl: "2.094969989053531e+152" },
        { exp: 507, dbl: "4.189939978107062e+152" },
        { exp: 508, dbl: "8.379879956214123e+152" },
        { exp: 509, dbl: "1.6759759912428246e+153" },
        { exp: 510, dbl: "3.3519519824856493e+153" },
        { exp: 511, dbl: "6.703903964971299e+153" },
        { exp: 512, dbl: "1.3407807929942597e+154" },
    ];
    var i, j;
    var t;
    var o;
    var d1;
    var d2;

    for (i = 0; i < two_to_n.length; i++) {
        o = two_to_n[i];
        t = '1';
        for (j = 0; j < o.exp; j++) {
            t = t + '0';
        }
        d1 = g.parseInt(t, 2);
        d2 = g.parseFloat(o.dbl);
        print(i, d1, d2, d1 === d2);
    }
}

try {
    exactnessTest();
} catch (e) {
    print(e.name);
}

/* FIXME: more tests */