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Reject negative shifts within constants

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This commit is contained in:
Alex Beregszaszi
2016-10-20 00:03:09 +01:00
parent 48f2028911
commit 33250eef9e
1 changed files with 8 additions and 4 deletions
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libsolidity/ast/Types.cpp
+8 -4
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@@ -710,9 +710,11 @@ TypePointer RationalNumberType::binaryOperatorResult(Token::Value _operator, Typ
using boost::multiprecision::pow;
if (fractional)
return TypePointer();
else if (abs(other.m_value) > numeric_limits<uint32_t>::max())
else if (other.m_value < 0)
return TypePointer();
uint32_t exponent = abs(other.m_value).numerator().convert_to<uint32_t>();
else if (other.m_value > numeric_limits<uint32_t>::max())
return TypePointer();
uint32_t exponent = other.m_value.numerator().convert_to<uint32_t>();
value = m_value.numerator() * pow(bigint(2), exponent);
break;
}
@@ -721,9 +723,11 @@ TypePointer RationalNumberType::binaryOperatorResult(Token::Value _operator, Typ
using boost::multiprecision::pow;
if (fractional)
return TypePointer();
else if (abs(other.m_value) > numeric_limits<uint32_t>::max())
else if (other.m_value < 0)
return TypePointer();
uint32_t exponent = abs(other.m_value).numerator().convert_to<uint32_t>();
else if (other.m_value > numeric_limits<uint32_t>::max())
return TypePointer();
uint32_t exponent = other.m_value.numerator().convert_to<uint32_t>();
value = rational(m_value.numerator() / pow(bigint(2), exponent), 1);
break;
}