diff options
Diffstat (limited to 'libsolidity/codegen')
| -rw-r--r-- | libsolidity/codegen/ArrayUtils.cpp | 32 | ||||
| -rw-r--r-- | libsolidity/codegen/ExpressionCompiler.cpp | 14 |
2 files changed, 14 insertions, 32 deletions
diff --git a/libsolidity/codegen/ArrayUtils.cpp b/libsolidity/codegen/ArrayUtils.cpp index 096b2d4e..d78e64a9 100644 --- a/libsolidity/codegen/ArrayUtils.cpp +++ b/libsolidity/codegen/ArrayUtils.cpp @@ -837,29 +837,23 @@ void ArrayUtils::popStorageArrayElement(ArrayType const& _type) const switch and(slot_value, 1) case 0 { // short byte array - let length := and(div(slot_value, 2), 0x3f) + let length := and(div(slot_value, 2), 0x1f) if iszero(length) { invalid() } - // Zero-out the suffix of the byte array by masking it. - // Do not zero-out the least significant byte, but mask the - // higher bits of the length. - // (((1<<(8 * (32 - length))) - 1) << 8) + 128 - let mask := add(mul(0x100, sub(exp(0x100, sub(32, length)), 1)), 0x80) - slot_value := and(not(mask), slot_value) - - // Reduce the length by 1 - slot_value := sub(slot_value, 2) + // Zero-out the suffix inlcluding the least significant byte. + let mask := sub(exp(0x100, sub(33, length)), 1) + length := sub(length, 1) + slot_value := or(and(not(mask), slot_value), mul(length, 2)) sstore(ref, slot_value) } case 1 { // long byte array let length := div(slot_value, 2) + let slot := keccak256(0, 0x20) mstore(0, ref) - switch length case 32 { - let slot := keccak256(0, 0x20) let data := sload(slot) sstore(slot, 0) data := and(data, not(0xff)) @@ -867,14 +861,14 @@ void ArrayUtils::popStorageArrayElement(ArrayType const& _type) const } default { - let slot := div(sub(length, 1), 32) - let offset := and(sub(length, 1), 0x1f) - slot := add(keccak256(0, 0x20), slot) + let slot_offset := div(sub(length, 1), 32) + let length_offset := and(sub(length, 1), 0x1f) + slot := add(slot, slot_offset) let data := sload(slot) // Zero-out the suffix of the byte array by masking it. // ((1<<(8 * (32 - offset))) - 1) - let mask := sub(exp(0x100, sub(32, offset)), 1) + let mask := sub(exp(0x100, sub(32, length_offset)), 1) data := and(not(mask), data) sstore(slot, data) @@ -887,8 +881,7 @@ void ArrayUtils::popStorageArrayElement(ArrayType const& _type) const m_context << Instruction::POP; } else - { - + { // stack: ArrayReference retrieveLength(_type); // stack: ArrayReference oldLength @@ -897,7 +890,6 @@ void ArrayUtils::popStorageArrayElement(ArrayType const& _type) const m_context << Instruction::ISZERO; m_context.appendConditionalInvalid(); - // Stack: ArrayReference oldLength m_context << u256(1) << Instruction::SWAP1 << Instruction::SUB; // Stack ArrayReference newLength @@ -905,7 +897,7 @@ void ArrayUtils::popStorageArrayElement(ArrayType const& _type) const // Stack ArrayReference newLength ArrayReference newLength; accessIndex(_type, false); // Stack: ArrayReference newLength storage_slot byte_offset - StorageItem(m_context, _type).setToZero(SourceLocation(), true); + StorageItem(m_context, *_type.baseType()).setToZero(SourceLocation(), true); // Stack: ArrayReference newLength m_context << Instruction::SWAP1 << Instruction::SSTORE; } diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp index ac7610fc..93d440c8 100644 --- a/libsolidity/codegen/ExpressionCompiler.cpp +++ b/libsolidity/codegen/ExpressionCompiler.cpp @@ -866,7 +866,6 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall) StorageByteArrayElement(m_context).storeValue(*type, _functionCall.location(), true); break; } - case FunctionType::Kind::ByteArrayPop: case FunctionType::Kind::ArrayPop: { _functionCall.expression().accept(*this); @@ -1359,22 +1358,13 @@ bool ExpressionCompiler::visit(MemberAccess const& _memberAccess) break; } } - else if (member == "push") + else if (member == "push" || member == "pop") { solAssert( type.isDynamicallySized() && type.location() == DataLocation::Storage && type.category() == Type::Category::Array, - "Tried to use .push() on a non-dynamically sized array" - ); - } - else if (member == "pop") - { - solAssert( - type.isDynamicallySized() && - type.location() == DataLocation::Storage && - type.category() == Type::Category::Array, - "Tried to use .pop() on a non-dynamically sized array" + "Tried to use ." + member + "() on a non-dynamically sized array" ); } else |