1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @authors
* Felix Lange <felix@ethdev.com>
*/
// rlpdump is a pretty-printer for RLP data.
package main
import (
"bytes"
"encoding/hex"
"flag"
"fmt"
"io"
"os"
"strings"
"github.com/ethereum/go-ethereum/rlp"
)
var (
hexMode = flag.String("hex", "", "dump given hex data")
noASCII = flag.Bool("noascii", false, "don't print ASCII strings readably")
)
func init() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr, "Usage:", os.Args[0], "[-noascii] [-hex <data>] [filename]")
flag.PrintDefaults()
fmt.Fprintln(os.Stderr, `
Dumps RLP data from the given file in readable form.
If the filename is omitted, data is read from stdin.`)
}
}
func main() {
flag.Parse()
var r io.Reader
switch {
case *hexMode != "":
data, err := hex.DecodeString(*hexMode)
if err != nil {
die(err)
}
r = bytes.NewReader(data)
case flag.NArg() == 0:
r = os.Stdin
case flag.NArg() == 1:
fd, err := os.Open(flag.Arg(0))
if err != nil {
die(err)
}
defer fd.Close()
r = fd
default:
fmt.Fprintln(os.Stderr, "Error: too many arguments")
flag.Usage()
os.Exit(2)
}
s := rlp.NewStream(r)
for {
if err := dump(s, 0); err != nil {
if err != io.EOF {
die(err)
}
break
}
fmt.Println()
}
}
func dump(s *rlp.Stream, depth int) error {
kind, size, err := s.Kind()
if err != nil {
return err
}
switch kind {
case rlp.Byte, rlp.String:
str, err := s.Bytes()
if err != nil {
return err
}
if len(str) == 0 || !*noASCII && isASCII(str) {
fmt.Printf("%s%q", ws(depth), str)
} else {
fmt.Printf("%s%x", ws(depth), str)
}
case rlp.List:
s.List()
defer s.ListEnd()
if size == 0 {
fmt.Print(ws(depth) + "[]")
} else {
fmt.Println(ws(depth) + "[")
for i := 0; ; i++ {
if i > 0 {
fmt.Print(",\n")
}
if err := dump(s, depth+1); err == rlp.EOL {
break
} else if err != nil {
return err
}
}
fmt.Print(ws(depth) + "]")
}
}
return nil
}
func isASCII(b []byte) bool {
for _, c := range b {
if c < 32 || c > 126 {
return false
}
}
return true
}
func ws(n int) string {
return strings.Repeat(" ", n)
}
func die(args ...interface{}) {
fmt.Fprintln(os.Stderr, args...)
os.Exit(1)
}
|
