145 lines
2.5 KiB
Go
145 lines
2.5 KiB
Go
package ethutil
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import (
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"math/big"
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"strconv"
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)
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// Op codes
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var OpCodes = map[string]byte{
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// 0x0 range - arithmetic ops
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"STOP": 0x00,
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"ADD": 0x01,
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"MUL": 0x02,
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"SUB": 0x03,
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"DIV": 0x04,
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"SDIV": 0x05,
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"MOD": 0x06,
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"SMOD": 0x07,
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"EXP": 0x08,
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"NEG": 0x09,
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"LT": 0x0a,
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"GT": 0x0b,
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"EQ": 0x0c,
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"NOT": 0x0d,
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// 0x10 range - bit ops
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"AND": 0x10,
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"OR": 0x11,
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"XOR": 0x12,
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"BYTE": 0x13,
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// 0x20 range - crypto
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"SHA3": 0x20,
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// 0x30 range - closure state
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"ADDRESS": 0x30,
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"BALANCE": 0x31,
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"ORIGIN": 0x32,
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"CALLER": 0x33,
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"CALLVALUE": 0x34,
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"CALLDATA": 0x35,
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"CALLDATASIZE": 0x36,
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"GASPRICE": 0x38,
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// 0x40 range - block operations
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"PREVHASH": 0x40,
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"COINBASE": 0x41,
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"TIMESTAMP": 0x42,
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"NUMBER": 0x43,
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"DIFFICULTY": 0x44,
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"GASLIMIT": 0x45,
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// 0x50 range - 'storage' and execution
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"PUSH": 0x50,
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"POP": 0x51,
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"DUP": 0x52,
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"SWAP": 0x53,
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"MLOAD": 0x54,
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"MSTORE": 0x55,
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"MSTORE8": 0x56,
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"SLOAD": 0x57,
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"SSTORE": 0x58,
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"JUMP": 0x59,
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"JUMPI": 0x5a,
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"PC": 0x5b,
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"MSIZE": 0x5c,
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// 0x60 range - closures
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"CREATE": 0x60,
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"CALL": 0x61,
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"RETURN": 0x62,
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// 0x70 range - other
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"LOG": 0x70,
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"SUICIDE": 0x7f,
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}
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func IsOpCode(s string) bool {
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for key, _ := range OpCodes {
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if key == s {
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return true
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}
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}
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return false
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}
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func CompileInstr(s interface{}) ([]byte, error) {
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switch s.(type) {
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case string:
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str := s.(string)
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isOp := IsOpCode(str)
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if isOp {
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return []byte{OpCodes[str]}, nil
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}
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num := new(big.Int)
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_, success := num.SetString(str, 0)
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// Assume regular bytes during compilation
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if !success {
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num.SetBytes([]byte(str))
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}
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return num.Bytes(), nil
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case int:
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return big.NewInt(int64(s.(int))).Bytes(), nil
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case []byte:
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return BigD(s.([]byte)).Bytes(), nil
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}
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return nil, nil
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}
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func Instr(instr string) (int, []string, error) {
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base := new(big.Int)
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base.SetString(instr, 0)
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args := make([]string, 7)
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for i := 0; i < 7; i++ {
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// int(int(val) / int(math.Pow(256,float64(i)))) % 256
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exp := BigPow(256, i)
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num := new(big.Int)
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num.Div(base, exp)
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args[i] = num.Mod(num, big.NewInt(256)).String()
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}
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op, _ := strconv.Atoi(args[0])
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return op, args[1:7], nil
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}
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// Script compilation functions
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// Compiles strings to machine code
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func Assemble(instructions ...interface{}) (script []string) {
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script = make([]string, len(instructions))
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for i, val := range instructions {
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instr, _ := CompileInstr(val)
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script[i] = string(instr)
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}
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return
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}
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