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Checked arithmetic by default.

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This commit is contained in:
chriseth
2020-10-19 16:58:37 +02:00
parent 41000fea31
commit 527c073bb9
21 changed files with 405 additions and 98 deletions
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libsolidity/codegen/YulUtilFunctions.h
+19 -1
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@@ -106,24 +106,35 @@ public:
/// signature: (x, y) -> sum
std::string overflowCheckedIntAddFunction(IntegerType const& _type);
/// signature: (x, y) -> sum
std::string wrappingIntAddFunction(IntegerType const& _type);
/// signature: (x, y) -> product
std::string overflowCheckedIntMulFunction(IntegerType const& _type);
/// signature: (x, y) -> product
std::string wrappingIntMulFunction(IntegerType const& _type);
/// @returns name of function to perform division on integers.
/// Checks for division by zero and the special case of
/// signed division of the smallest number by -1.
std::string overflowCheckedIntDivFunction(IntegerType const& _type);
/// @returns name of function to perform division on integers.
/// Checks for division by zero.
std::string wrappingIntDivFunction(IntegerType const& _type);
/// @returns name of function to perform modulo on integers.
/// Reverts for modulo by zero.
std::string checkedIntModFunction(IntegerType const& _type);
std::string intModFunction(IntegerType const& _type);
/// @returns computes the difference between two values.
/// Assumes the input to be in range for the type.
/// signature: (x, y) -> diff
std::string overflowCheckedIntSubFunction(IntegerType const& _type);
/// @returns computes the difference between two values.
/// signature: (x, y) -> diff
std::string wrappingIntSubFunction(IntegerType const& _type);
/// @returns the name of the exponentiation function.
/// signature: (base, exponent) -> power
std::string overflowCheckedIntExpFunction(IntegerType const& _type, IntegerType const& _exponentType);
@@ -151,6 +162,10 @@ public:
/// signature: (power, base, exponent, max) -> power
std::string overflowCheckedExpLoopFunction();
/// @returns the name of the exponentiation function.
/// signature: (base, exponent) -> power
std::string wrappingIntExpFunction(IntegerType const& _type, IntegerType const& _exponentType);
/// @returns the name of a function that fetches the length of the given
/// array
/// signature: (array) -> length
@@ -367,9 +382,12 @@ public:
std::string forwardingRevertFunction();
std::string incrementCheckedFunction(Type const& _type);
std::string incrementWrappingFunction(Type const& _type);
std::string decrementCheckedFunction(Type const& _type);
std::string decrementWrappingFunction(Type const& _type);
std::string negateNumberCheckedFunction(Type const& _type);
std::string negateNumberWrappingFunction(Type const& _type);
/// @returns the name of a function that returns the zero value for the
/// provided type.