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				https://github.com/ethereum/solidity
				synced 2023-10-03 13:03:40 +00:00 
			
		
		
		
	
		
			
				
	
	
		
			28 lines
		
	
	
		
			720 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			28 lines
		
	
	
		
			720 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
contract C {
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    function f(string calldata x) external returns (bytes memory r) {
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        uint mptr;
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        assembly {
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            // dirty memory
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            mptr := mload(0x40)
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            for { let i := mptr } lt(i, add(mptr, 0x0100)) { i := add(i, 32) }
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            {
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                mstore(i, sub(0, 1))
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            }
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        }
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        r = abi.encode(x);
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        assembly {
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            // assert that we dirtied the memory that was encoded to
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            if iszero(eq(mptr, r)) {
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                revert(0, 0)
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            }
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        }
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    }
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    function test() external returns (bytes memory) {
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        return this.f("abc");
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    }
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}
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// ====
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// EVMVersion: >homestead
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// ----
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// test() -> 0x20, 0x60, 0x20, 3, "abc"
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