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
149
150
151
152
153
154
155
156
157
158
159
160
|
// Copyright 2015, Joe Tsai. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE.md file.
//go:build debug
// +build debug
package prefix
import (
"fmt"
"math"
"strings"
)
func max(a, b int) int {
if a > b {
return a
}
return b
}
func lenBase2(n uint) int {
return int(math.Ceil(math.Log2(float64(n + 1))))
}
func padBase2(v, n uint, m int) string {
s := fmt.Sprintf("%b", 1<<n|v)[1:]
if pad := m - len(s); pad > 0 {
return strings.Repeat(" ", pad) + s
}
return s
}
func lenBase10(n int) int {
return int(math.Ceil(math.Log10(float64(n + 1))))
}
func padBase10(n, m int) string {
s := fmt.Sprintf("%d", n)
if pad := m - len(s); pad > 0 {
return strings.Repeat(" ", pad) + s
}
return s
}
func (rc RangeCodes) String() string {
var maxLen, maxBase int
for _, c := range rc {
maxLen = max(maxLen, int(c.Len))
maxBase = max(maxBase, int(c.Base))
}
var ss []string
ss = append(ss, "{")
for i, c := range rc {
base := padBase10(int(c.Base), lenBase10(maxBase))
if c.Len > 0 {
base += fmt.Sprintf("-%d", c.End()-1)
}
ss = append(ss, fmt.Sprintf("\t%s: {len: %s, range: %s},",
padBase10(int(i), lenBase10(len(rc)-1)),
padBase10(int(c.Len), lenBase10(maxLen)),
base,
))
}
ss = append(ss, "}")
return strings.Join(ss, "\n")
}
func (pc PrefixCodes) String() string {
var maxSym, maxLen, maxCnt int
for _, c := range pc {
maxSym = max(maxSym, int(c.Sym))
maxLen = max(maxLen, int(c.Len))
maxCnt = max(maxCnt, int(c.Cnt))
}
var ss []string
ss = append(ss, "{")
for _, c := range pc {
var cntStr string
if maxCnt > 0 {
cnt := int(32*float32(c.Cnt)/float32(maxCnt) + 0.5)
cntStr = fmt.Sprintf("%s |%s",
padBase10(int(c.Cnt), lenBase10(maxCnt)),
strings.Repeat("#", cnt),
)
}
ss = append(ss, fmt.Sprintf("\t%s: %s, %s",
padBase10(int(c.Sym), lenBase10(maxSym)),
padBase2(uint(c.Val), uint(c.Len), maxLen),
cntStr,
))
}
ss = append(ss, "}")
return strings.Join(ss, "\n")
}
func (pd Decoder) String() string {
var ss []string
ss = append(ss, "{")
if len(pd.chunks) > 0 {
ss = append(ss, "\tchunks: {")
for i, c := range pd.chunks {
label := "sym"
if uint(c&countMask) > uint(pd.chunkBits) {
label = "idx"
}
ss = append(ss, fmt.Sprintf("\t\t%s: {%s: %s, len: %s}",
padBase2(uint(i), uint(pd.chunkBits), int(pd.chunkBits)),
label, padBase10(int(c>>countBits), 3),
padBase10(int(c&countMask), 2),
))
}
ss = append(ss, "\t},")
for j, links := range pd.links {
ss = append(ss, fmt.Sprintf("\tlinks[%d]: {", j))
linkBits := lenBase2(uint(pd.linkMask))
for i, c := range links {
ss = append(ss, fmt.Sprintf("\t\t%s: {sym: %s, len: %s},",
padBase2(uint(i), uint(linkBits), int(linkBits)),
padBase10(int(c>>countBits), 3),
padBase10(int(c&countMask), 2),
))
}
ss = append(ss, "\t},")
}
}
ss = append(ss, fmt.Sprintf("\tchunkMask: %b,", pd.chunkMask))
ss = append(ss, fmt.Sprintf("\tlinkMask: %b,", pd.linkMask))
ss = append(ss, fmt.Sprintf("\tchunkBits: %d,", pd.chunkBits))
ss = append(ss, fmt.Sprintf("\tMinBits: %d,", pd.MinBits))
ss = append(ss, fmt.Sprintf("\tNumSyms: %d,", pd.NumSyms))
ss = append(ss, "}")
return strings.Join(ss, "\n")
}
func (pe Encoder) String() string {
var maxLen int
for _, c := range pe.chunks {
maxLen = max(maxLen, int(c&countMask))
}
var ss []string
ss = append(ss, "{")
if len(pe.chunks) > 0 {
ss = append(ss, "\tchunks: {")
for i, c := range pe.chunks {
ss = append(ss, fmt.Sprintf("\t\t%s: %s,",
padBase10(i, 3),
padBase2(uint(c>>countBits), uint(c&countMask), maxLen),
))
}
ss = append(ss, "\t},")
}
ss = append(ss, fmt.Sprintf("\tchunkMask: %b,", pe.chunkMask))
ss = append(ss, fmt.Sprintf("\tNumSyms: %d,", pe.NumSyms))
ss = append(ss, "}")
return strings.Join(ss, "\n")
}
|
