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Counterexamples from Eldarica

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This commit is contained in:
Leo Alt
2022-05-15 17:43:12 +02:00
parent a3bd01d9fc
commit 3d21f1e4c3
7 changed files with 276 additions and 8 deletions
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libsolutil/StringUtils.h
+19 -3
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@@ -145,16 +145,32 @@ inline std::string formatNumberReadable(
// when multiple trailing FF bytes, format as N * 2**x - 1
i = 0;
for (v = _value; (v & 0xff) == 0xff; v >>= 8)
std::string minus;
v = _value;
if ((v & 0xff) == 0xfe)
{
++i;
minus = "2";
v >>= 8;
}
else if ((v & 0xff) == 0xfd)
{
++i;
minus = "3";
v >>= 8;
}
else
minus = "1";
for (; (v & 0xff) == 0xff; v >>= 8)
++i;
if (i > 2)
{
// 0xFF yields 2**8 - 1 (v is 0 in that case)
if (v == 0)
return "2**" + std::to_string(i * 8) + " - 1";
return "2**" + std::to_string(i * 8) + " - " + minus;//1";
return toHex(toCompactBigEndian(T(v + 1)), prefix, hexcase) +
" * 2**" + std::to_string(i * 8) +
" - 1";
" - " + minus;//1";
}
std::string str = toHex(toCompactBigEndian(_value), prefix, hexcase);