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85 lines
3.0 KiB
85 lines
3.0 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package abi
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import (
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"math/big"
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"reflect"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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)
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var (
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big_t = reflect.TypeOf(big.Int{})
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ubig_t = reflect.TypeOf(big.Int{})
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byte_t = reflect.TypeOf(byte(0))
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byte_ts = reflect.TypeOf([]byte(nil))
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uint_t = reflect.TypeOf(uint(0))
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uint8_t = reflect.TypeOf(uint8(0))
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uint16_t = reflect.TypeOf(uint16(0))
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uint32_t = reflect.TypeOf(uint32(0))
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uint64_t = reflect.TypeOf(uint64(0))
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int_t = reflect.TypeOf(int(0))
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int8_t = reflect.TypeOf(int8(0))
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int16_t = reflect.TypeOf(int16(0))
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int32_t = reflect.TypeOf(int32(0))
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int64_t = reflect.TypeOf(int64(0))
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hash_t = reflect.TypeOf(common.Hash{})
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address_t = reflect.TypeOf(common.Address{})
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uint_ts = reflect.TypeOf([]uint(nil))
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uint8_ts = reflect.TypeOf([]uint8(nil))
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uint16_ts = reflect.TypeOf([]uint16(nil))
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uint32_ts = reflect.TypeOf([]uint32(nil))
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uint64_ts = reflect.TypeOf([]uint64(nil))
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ubig_ts = reflect.TypeOf([]*big.Int(nil))
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int_ts = reflect.TypeOf([]int(nil))
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int8_ts = reflect.TypeOf([]int8(nil))
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int16_ts = reflect.TypeOf([]int16(nil))
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int32_ts = reflect.TypeOf([]int32(nil))
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int64_ts = reflect.TypeOf([]int64(nil))
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big_ts = reflect.TypeOf([]*big.Int(nil))
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)
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// U256 converts a big Int into a 256bit EVM number.
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func U256(n *big.Int) []byte {
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return common.LeftPadBytes(math.U256(n).Bytes(), 32)
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}
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// packNum packs the given number (using the reflect value) and will cast it to appropriate number representation
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func packNum(value reflect.Value) []byte {
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switch kind := value.Kind(); kind {
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return U256(new(big.Int).SetUint64(value.Uint()))
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return U256(big.NewInt(value.Int()))
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case reflect.Ptr:
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return U256(value.Interface().(*big.Int))
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}
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return nil
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}
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// checks whether the given reflect value is signed. This also works for slices with a number type
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func isSigned(v reflect.Value) bool {
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switch v.Type() {
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case int_ts, int8_ts, int16_ts, int32_ts, int64_ts, int_t, int8_t, int16_t, int32_t, int64_t:
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return true
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}
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return false
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}
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