diff options
Diffstat (limited to 'ethutil')
| -rw-r--r-- | ethutil/asm.go | 193 | ||||
| -rw-r--r-- | ethutil/asm_test.go | 31 |
2 files changed, 0 insertions, 224 deletions
diff --git a/ethutil/asm.go b/ethutil/asm.go deleted file mode 100644 index a547d3ac1..000000000 --- a/ethutil/asm.go +++ /dev/null @@ -1,193 +0,0 @@ -package ethutil - -import ( - _ "fmt" - "math/big" - _ "regexp" -) - -// Op codes -var OpCodes = map[string]byte{ - // 0x0 range - arithmetic ops - "STOP": 0x00, - "ADD": 0x01, - "MUL": 0x02, - "SUB": 0x03, - "DIV": 0x04, - "SDIV": 0x05, - "MOD": 0x06, - "SMOD": 0x07, - "EXP": 0x08, - "NEG": 0x09, - "LT": 0x0a, - "GT": 0x0b, - "EQ": 0x0c, - "NOT": 0x0d, - - // 0x10 range - bit ops - "AND": 0x10, - "OR": 0x11, - "XOR": 0x12, - "BYTE": 0x13, - - // 0x20 range - crypto - "SHA3": 0x20, - - // 0x30 range - closure state - "ADDRESS": 0x30, - "BALANCE": 0x31, - "ORIGIN": 0x32, - "CALLER": 0x33, - "CALLVALUE": 0x34, - "CALLDATALOAD": 0x35, - "CALLDATASIZE": 0x36, - "GASPRICE": 0x38, - - // 0x40 range - block operations - "PREVHASH": 0x40, - "COINBASE": 0x41, - "TIMESTAMP": 0x42, - "NUMBER": 0x43, - "DIFFICULTY": 0x44, - "GASLIMIT": 0x45, - - // 0x50 range - 'storage' and execution - "PUSH": 0x50, - - "PUSH20": 0x80, - - "POP": 0x51, - "DUP": 0x52, - "SWAP": 0x53, - "MLOAD": 0x54, - "MSTORE": 0x55, - "MSTORE8": 0x56, - "SLOAD": 0x57, - "SSTORE": 0x58, - "JUMP": 0x59, - "JUMPI": 0x5a, - "PC": 0x5b, - "MSIZE": 0x5c, - - // 0x60 range - closures - "CREATE": 0x60, - "CALL": 0x61, - "RETURN": 0x62, - - // 0x70 range - other - "LOG": 0x70, - "SUICIDE": 0x7f, -} - -// Is op code -// -// Check whether the given string matches anything in -// the OpCode list -func IsOpCode(s string) bool { - for key, _ := range OpCodes { - if key == s { - return true - } - } - return false -} - -// Compile instruction -// -// Attempts to compile and parse the given instruction in "s" -// and returns the byte sequence -func CompileInstr(s interface{}) ([]byte, error) { - switch s.(type) { - case string: - str := s.(string) - isOp := IsOpCode(str) - if isOp { - return []byte{OpCodes[str]}, nil - } - - num := new(big.Int) - _, success := num.SetString(str, 0) - // Assume regular bytes during compilation - if !success { - num.SetBytes([]byte(str)) - } else { - // tmp fix for 32 bytes - n := BigToBytes(num, 256) - return n, nil - } - - return num.Bytes(), nil - case int: - num := BigToBytes(big.NewInt(int64(s.(int))), 256) - return num, nil - case []byte: - return BigD(s.([]byte)).Bytes(), nil - } - - return nil, nil -} - -// Assemble -// -// Assembles the given instructions and returns EVM byte code -func Assemble(instructions ...interface{}) (script []byte) { - //script = make([]string, len(instructions)) - - for _, val := range instructions { - instr, _ := CompileInstr(val) - - //script[i] = string(instr) - script = append(script, instr...) - } - - return -} - -// Pre process script -// -// Take data apart and attempt to find the "init" section and -// "main" section. `main { } init { }` -func PreProcess(data string) (mainInput, initInput string) { - mainInput = getCodeSectionFor("main", data) - if mainInput == "" { - mainInput = data - } - initInput = getCodeSectionFor("init", data) - - return -} - -// Very, very dumb parser. Heed no attention :-) -func getCodeSectionFor(blockMatcher, input string) string { - curCount := -1 - length := len(blockMatcher) - matchfst := rune(blockMatcher[0]) - var currStr string - - for i, run := range input { - // Find init - if curCount == -1 && run == matchfst && input[i:i+length] == blockMatcher { - curCount = 0 - } else if curCount > -1 { - if run == '{' { - curCount++ - if curCount == 1 { - continue - } - } else if run == '}' { - curCount-- - if curCount == 0 { - // we are done - curCount = -1 - break - } - } - - if curCount > 0 { - currStr += string(run) - } - } - } - - return currStr -} diff --git a/ethutil/asm_test.go b/ethutil/asm_test.go deleted file mode 100644 index a9ad347dd..000000000 --- a/ethutil/asm_test.go +++ /dev/null @@ -1,31 +0,0 @@ -package ethutil - -import ( - "fmt" - "testing" -) - -func TestPreProcess(t *testing.T) { - main, init := PreProcess(` - init { - // init - if a > b { - if { - } - } - } - - main { - // main - if a > b { - if c > d { - } - } - } - `) - - fmt.Println("main") - fmt.Println(main) - fmt.Println("init") - fmt.Println(init) -} |