github.com/anthdm/go-ethereum@v1.8.4-0.20180412101906-60516c83b011/common/types_template.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum 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-ethereum 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  // +build none
    18  //sed -e 's/_N_/Hash/g' -e 's/_S_/32/g' -e '1d' types_template.go | gofmt -w hash.go
    19  
    20  package common
    21  
    22  import "math/big"
    23  
    24  type _N_ [_S_]byte
    25  
    26  func BytesTo_N_(b []byte) _N_ {
    27  	var h _N_
    28  	h.SetBytes(b)
    29  	return h
    30  }
    31  func StringTo_N_(s string) _N_ { return BytesTo_N_([]byte(s)) }
    32  func BigTo_N_(b *big.Int) _N_  { return BytesTo_N_(b.Bytes()) }
    33  func HexTo_N_(s string) _N_    { return BytesTo_N_(FromHex(s)) }
    34  
    35  // Don't use the default 'String' method in case we want to overwrite
    36  
    37  // Get the string representation of the underlying hash
    38  func (h _N_) Str() string   { return string(h[:]) }
    39  func (h _N_) Bytes() []byte { return h[:] }
    40  func (h _N_) Big() *big.Int { return new(big.Int).SetBytes(h[:]) }
    41  func (h _N_) Hex() string   { return "0x" + Bytes2Hex(h[:]) }
    42  
    43  // Sets the hash to the value of b. If b is larger than len(h) it will panic
    44  func (h *_N_) SetBytes(b []byte) {
    45  	// Use the right most bytes
    46  	if len(b) > len(h) {
    47  		b = b[len(b)-_S_:]
    48  	}
    49  
    50  	// Reverse the loop
    51  	for i := len(b) - 1; i >= 0; i-- {
    52  		h[_S_-len(b)+i] = b[i]
    53  	}
    54  }
    55  
    56  // Set string `s` to h. If s is larger than len(h) it will panic
    57  func (h *_N_) SetString(s string) { h.SetBytes([]byte(s)) }
    58  
    59  // Sets h to other
    60  func (h *_N_) Set(other _N_) {
    61  	for i, v := range other {
    62  		h[i] = v
    63  	}
    64  }