github.com/waltonchain/waltonchain_gwtc_src@v1.1.4-0.20201225072101-8a298c95a819/accounts/abi/numbers.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-wtc library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-wtc library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package abi
    18  
    19  import (
    20  	"math/big"
    21  	"reflect"
    22  
    23  	"github.com/wtc/go-wtc/common"
    24  	"github.com/wtc/go-wtc/common/math"
    25  )
    26  
    27  var (
    28  	big_t     = reflect.TypeOf(big.Int{})
    29  	ubig_t    = reflect.TypeOf(big.Int{})
    30  	byte_t    = reflect.TypeOf(byte(0))
    31  	byte_ts   = reflect.TypeOf([]byte(nil))
    32  	uint_t    = reflect.TypeOf(uint(0))
    33  	uint8_t   = reflect.TypeOf(uint8(0))
    34  	uint16_t  = reflect.TypeOf(uint16(0))
    35  	uint32_t  = reflect.TypeOf(uint32(0))
    36  	uint64_t  = reflect.TypeOf(uint64(0))
    37  	int_t     = reflect.TypeOf(int(0))
    38  	int8_t    = reflect.TypeOf(int8(0))
    39  	int16_t   = reflect.TypeOf(int16(0))
    40  	int32_t   = reflect.TypeOf(int32(0))
    41  	int64_t   = reflect.TypeOf(int64(0))
    42  	hash_t    = reflect.TypeOf(common.Hash{})
    43  	address_t = reflect.TypeOf(common.Address{})
    44  
    45  	uint_ts   = reflect.TypeOf([]uint(nil))
    46  	uint8_ts  = reflect.TypeOf([]uint8(nil))
    47  	uint16_ts = reflect.TypeOf([]uint16(nil))
    48  	uint32_ts = reflect.TypeOf([]uint32(nil))
    49  	uint64_ts = reflect.TypeOf([]uint64(nil))
    50  	ubig_ts   = reflect.TypeOf([]*big.Int(nil))
    51  
    52  	int_ts   = reflect.TypeOf([]int(nil))
    53  	int8_ts  = reflect.TypeOf([]int8(nil))
    54  	int16_ts = reflect.TypeOf([]int16(nil))
    55  	int32_ts = reflect.TypeOf([]int32(nil))
    56  	int64_ts = reflect.TypeOf([]int64(nil))
    57  	big_ts   = reflect.TypeOf([]*big.Int(nil))
    58  )
    59  
    60  // U256 converts a big Int into a 256bit EVM number.
    61  func U256(n *big.Int) []byte {
    62  	return math.PaddedBigBytes(math.U256(n), 32)
    63  }
    64  
    65  // checks whether the given reflect value is signed. This also works for slices with a number type
    66  func isSigned(v reflect.Value) bool {
    67  	switch v.Type() {
    68  	case int_ts, int8_ts, int16_ts, int32_ts, int64_ts, int_t, int8_t, int16_t, int32_t, int64_t:
    69  		return true
    70  	}
    71  	return false
    72  }