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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
use std::path::{Path, PathBuf};
use croaring::Bitmap;
use crate::core::core::hash::Hashed;
use crate::core::core::pmmr;
use crate::core::core::BlockHeader;
use crate::prune_list::PruneList;
use crate::{read_bitmap, save_via_temp_file};
use std::fs::File;
use std::io::{self, BufWriter, Write};
pub struct LeafSet {
path: PathBuf,
bitmap: Bitmap,
bitmap_bak: Bitmap,
}
impl LeafSet {
pub fn open<P: AsRef<Path>>(path: P) -> io::Result<LeafSet> {
let file_path = path.as_ref();
let bitmap = if file_path.exists() {
read_bitmap(&file_path)?
} else {
Bitmap::create()
};
if !bitmap.is_empty() {
debug!(
"bitmap {} pos ({} bytes)",
bitmap.cardinality(),
bitmap.get_serialized_size_in_bytes(),
);
}
Ok(LeafSet {
path: file_path.to_path_buf(),
bitmap_bak: bitmap.clone(),
bitmap,
})
}
pub fn copy_snapshot<P: AsRef<Path>>(path: P, cp_path: P) -> io::Result<()> {
let cp_file_path = cp_path.as_ref();
if !cp_file_path.exists() {
debug!(
"leaf_set: rewound leaf file not found: {}",
cp_file_path.display()
);
return Ok(());
}
let bitmap = read_bitmap(&cp_file_path)?;
debug!(
"leaf_set: copying rewound file {} to {}",
cp_file_path.display(),
path.as_ref().display()
);
let mut leaf_set = LeafSet {
path: path.as_ref().to_path_buf(),
bitmap_bak: bitmap.clone(),
bitmap,
};
leaf_set.flush()?;
Ok(())
}
fn unpruned_pre_cutoff(&self, cutoff_pos: u64, prune_list: &PruneList) -> Bitmap {
(1..=cutoff_pos)
.filter(|&x| pmmr::is_leaf(x))
.filter(|&x| !prune_list.is_pruned(x))
.map(|x| x as u32)
.collect()
}
pub fn removed_pre_cutoff(
&self,
cutoff_pos: u64,
rewind_rm_pos: &Bitmap,
prune_list: &PruneList,
) -> Bitmap {
let mut bitmap = self.bitmap.clone();
let marker_from = cutoff_pos;
let marker_to = self.bitmap.maximum() as u64;
let rewind_add_pos: Bitmap = ((marker_from + 1)..=marker_to).map(|x| x as u32).collect();
bitmap.andnot_inplace(&rewind_add_pos);
bitmap.or_inplace(&rewind_rm_pos);
bitmap
.flip(1..(cutoff_pos + 1))
.and(&self.unpruned_pre_cutoff(cutoff_pos, prune_list))
}
pub fn rewind(&mut self, cutoff_pos: u64, rewind_rm_pos: &Bitmap) {
let marker_from = cutoff_pos;
let marker_to = self.bitmap.maximum() as u64;
let rewind_add_pos: Bitmap = ((marker_from + 1)..=marker_to).map(|x| x as u32).collect();
self.bitmap.andnot_inplace(&rewind_add_pos);
self.bitmap.or_inplace(&rewind_rm_pos);
}
pub fn add(&mut self, pos: u64) {
self.bitmap.add(pos as u32);
}
pub fn remove(&mut self, pos: u64) {
self.bitmap.remove(pos as u32);
}
pub fn snapshot(&self, header: &BlockHeader) -> io::Result<()> {
let mut cp_bitmap = self.bitmap.clone();
cp_bitmap.run_optimize();
let cp_path = format!("{}.{}", self.path.to_str().unwrap(), header.hash());
let mut file = BufWriter::new(File::create(cp_path)?);
file.write_all(&cp_bitmap.serialize())?;
file.flush()?;
Ok(())
}
pub fn flush(&mut self) -> io::Result<()> {
self.bitmap.run_optimize();
save_via_temp_file(&self.path, ".tmp", |w| {
let mut w = BufWriter::new(w);
w.write_all(&self.bitmap.serialize())?;
w.flush()
})?;
self.bitmap_bak = self.bitmap.clone();
Ok(())
}
pub fn discard(&mut self) {
self.bitmap = self.bitmap_bak.clone();
}
pub fn includes(&self, pos: u64) -> bool {
self.bitmap.contains(pos as u32)
}
pub fn len(&self) -> usize {
self.bitmap.cardinality() as usize
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn iter(&self) -> impl Iterator<Item = u64> + '_ {
self.bitmap.iter().map(|x| x as u64)
}
}