annotate rust/hg-core/src/revlog/index.rs @ 51185:1ef4a36a934d

rust-index: add an abstraction to support bytes added at runtimes In order to support appending data to the Rust index, we need to abstract data access away from the immutable (on-disk) bytes, to seemlessly fetch either from the preexisting data or from the newly added data.
author Rapha?l Gom?s <rgomes@octobus.net>
date Mon, 26 Jun 2023 19:16:07 +0200
parents 4c5f6e95df84
children b4d152a28742
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 use std::fmt::Debug;
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2 use std::ops::Deref;
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3
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4 use byteorder::{BigEndian, ByteOrder};
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5
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6 use crate::errors::HgError;
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7 use crate::revlog::node::Node;
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8 use crate::revlog::{Revision, NULL_REVISION};
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9 use crate::{Graph, GraphError, RevlogIndex, UncheckedRevision};
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10
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11 pub const INDEX_ENTRY_SIZE: usize = 64;
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12
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13 pub struct IndexHeader {
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14 header_bytes: [u8; 4],
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15 }
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16
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17 #[derive(Copy, Clone)]
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18 pub struct IndexHeaderFlags {
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19 flags: u16,
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20 }
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21
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22 /// Corresponds to the high bits of `_format_flags` in python
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23 impl IndexHeaderFlags {
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24 /// Corresponds to FLAG_INLINE_DATA in python
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25 pub fn is_inline(self) -> bool {
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26 self.flags & 1 != 0
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27 }
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28 /// Corresponds to FLAG_GENERALDELTA in python
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29 pub fn uses_generaldelta(self) -> bool {
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30 self.flags & 2 != 0
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31 }
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32 }
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33
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34 /// Corresponds to the INDEX_HEADER structure,
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35 /// which is parsed as a `header` variable in `_loadindex` in `revlog.py`
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36 impl IndexHeader {
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37 fn format_flags(&self) -> IndexHeaderFlags {
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38 // No "unknown flags" check here, unlike in python. Maybe there should
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39 // be.
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40 IndexHeaderFlags {
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41 flags: BigEndian::read_u16(&self.header_bytes[0..2]),
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42 }
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43 }
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44
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45 /// The only revlog version currently supported by rhg.
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46 const REVLOGV1: u16 = 1;
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47
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48 /// Corresponds to `_format_version` in Python.
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49 fn format_version(&self) -> u16 {
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50 BigEndian::read_u16(&self.header_bytes[2..4])
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51 }
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52
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53 const EMPTY_INDEX_HEADER: IndexHeader = IndexHeader {
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54 // We treat an empty file as a valid index with no entries.
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55 // Here we make an arbitrary choice of what we assume the format of the
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56 // index to be (V1, using generaldelta).
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57 // This doesn't matter too much, since we're only doing read-only
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58 // access. but the value corresponds to the `new_header` variable in
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59 // `revlog.py`, `_loadindex`
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60 header_bytes: [0, 3, 0, 1],
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61 };
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62
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63 fn parse(index_bytes: &[u8]) -> Result<IndexHeader, HgError> {
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64 if index_bytes.is_empty() {
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65 return Ok(IndexHeader::EMPTY_INDEX_HEADER);
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66 }
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67 if index_bytes.len() < 4 {
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68 return Err(HgError::corrupted(
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69 "corrupted revlog: can't read the index format header",
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70 ));
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71 }
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72 Ok(IndexHeader {
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73 header_bytes: {
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74 let bytes: [u8; 4] =
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75 index_bytes[0..4].try_into().expect("impossible");
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76 bytes
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77 },
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78 })
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79 }
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80 }
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81
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82 /// Abstracts the access to the index bytes since they can be spread between
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83 /// the immutable (bytes) part and the mutable (added) part if any appends
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84 /// happened. This makes it transparent for the callers.
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85 struct IndexData {
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86 /// Immutable bytes, most likely taken from disk
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87 bytes: Box<dyn Deref<Target = [u8]> + Send>,
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88 /// Bytes that were added after reading the index
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89 added: Vec<u8>,
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90 }
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91
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92 impl IndexData {
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93 pub fn new(bytes: Box<dyn Deref<Target = [u8]> + Send>) -> Self {
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94 Self {
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95 bytes,
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96 added: vec![],
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97 }
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98 }
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99
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100 pub fn len(&self) -> usize {
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101 self.bytes.len() + self.added.len()
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102 }
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103 }
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104
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105 impl std::ops::Index<std::ops::Range<usize>> for IndexData {
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106 type Output = [u8];
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107
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108 fn index(&self, index: std::ops::Range<usize>) -> &Self::Output {
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109 let start = index.start;
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110 let end = index.end;
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111 let immutable_len = self.bytes.len();
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112 if start < immutable_len {
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113 if end > immutable_len {
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114 panic!("index data cannot span existing and added ranges");
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115 }
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116 &self.bytes[index]
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117 } else {
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118 &self.added[start - immutable_len..end - immutable_len]
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119 }
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120 }
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121 }
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122
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123 /// A Revlog index
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124 pub struct Index {
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125 bytes: IndexData,
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126 /// Offsets of starts of index blocks.
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127 /// Only needed when the index is interleaved with data.
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128 offsets: Option<Vec<usize>>,
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129 uses_generaldelta: bool,
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130 }
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131
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132 impl Debug for Index {
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133 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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134 f.debug_struct("Index")
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135 .field("offsets", &self.offsets)
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136 .field("uses_generaldelta", &self.uses_generaldelta)
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137 .finish()
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138 }
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139 }
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140
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141 impl Graph for Index {
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142 fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError> {
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143 let err = || GraphError::ParentOutOfRange(rev);
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144 match self.get_entry(rev) {
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145 Some(entry) => {
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146 // The C implementation checks that the parents are valid
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147 // before returning
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148 Ok([
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149 self.check_revision(entry.p1()).ok_or_else(err)?,
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150 self.check_revision(entry.p2()).ok_or_else(err)?,
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151 ])
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152 }
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153 None => Ok([NULL_REVISION, NULL_REVISION]),
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154 }
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155 }
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156 }
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157
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158 impl Index {
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159 /// Create an index from bytes.
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160 /// Calculate the start of each entry when is_inline is true.
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161 pub fn new(
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162 bytes: Box<dyn Deref<Target = [u8]> + Send>,
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163 ) -> Result<Self, HgError> {
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164 let header = IndexHeader::parse(bytes.as_ref())?;
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165
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166 if header.format_version() != IndexHeader::REVLOGV1 {
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167 // A proper new version should have had a repo/store
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168 // requirement.
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169 return Err(HgError::corrupted("unsupported revlog version"));
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170 }
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171
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172 // This is only correct because we know version is REVLOGV1.
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173 // In v2 we always use generaldelta, while in v0 we never use
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174 // generaldelta. Similar for [is_inline] (it's only used in v1).
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175 let uses_generaldelta = header.format_flags().uses_generaldelta();
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176
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177 if header.format_flags().is_inline() {
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178 let mut offset: usize = 0;
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179 let mut offsets = Vec::new();
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180
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181 while offset + INDEX_ENTRY_SIZE <= bytes.len() {
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182 offsets.push(offset);
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183 let end = offset + INDEX_ENTRY_SIZE;
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184 let entry = IndexEntry {
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185 bytes: &bytes[offset..end],
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186 offset_override: None,
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187 };
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188
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189 offset += INDEX_ENTRY_SIZE + entry.compressed_len() as usize;
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190 }
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191
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192 if offset == bytes.len() {
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193 Ok(Self {
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194 bytes: IndexData::new(bytes),
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195 offsets: Some(offsets),
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196 uses_generaldelta,
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197 })
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198 } else {
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199 Err(HgError::corrupted("unexpected inline revlog length"))
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200 }
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201 } else {
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202 Ok(Self {
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203 bytes: IndexData::new(bytes),
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204 offsets: None,
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205 uses_generaldelta,
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206 })
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207 }
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208 }
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209
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210 pub fn uses_generaldelta(&self) -> bool {
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211 self.uses_generaldelta
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212 }
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213
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214 /// Value of the inline flag.
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215 pub fn is_inline(&self) -> bool {
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216 self.offsets.is_some()
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217 }
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218
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219 /// Return a slice of bytes if `revlog` is inline. Panic if not.
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220 pub fn data(&self, start: usize, end: usize) -> &[u8] {
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221 if !self.is_inline() {
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222 panic!("tried to access data in the index of a revlog that is not inline");
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223 }
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224 &self.bytes[start..end]
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225 }
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226
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227 /// Return number of entries of the revlog index.
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228 pub fn len(&self) -> usize {
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229 if let Some(offsets) = &self.offsets {
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230 offsets.len()
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231 } else {
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232 self.bytes.len() / INDEX_ENTRY_SIZE
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233 }
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234 }
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235
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236 /// Returns `true` if the `Index` has zero `entries`.
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237 pub fn is_empty(&self) -> bool {
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238 self.len() == 0
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239 }
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240
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241 /// Return the index entry corresponding to the given revision if it
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242 /// exists.
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243 pub fn get_entry(&self, rev: Revision) -> Option<IndexEntry> {
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244 if rev == NULL_REVISION {
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245 return None;
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246 }
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247 Some(if let Some(offsets) = &self.offsets {
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248 self.get_entry_inline(rev, offsets)
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249 } else {
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250 self.get_entry_separated(rev)
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251 })
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252 }
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253
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254 fn get_entry_inline(
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255 &self,
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256 rev: Revision,
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257 offsets: &[usize],
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258 ) -> IndexEntry {
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259 let start = offsets[rev.0 as usize];
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260 let end = start + INDEX_ENTRY_SIZE;
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261 let bytes = &self.bytes[start..end];
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262
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263 // See IndexEntry for an explanation of this override.
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264 let offset_override = Some(end);
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265
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266 IndexEntry {
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267 bytes,
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268 offset_override,
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269 }
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270 }
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271
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272 fn get_entry_separated(&self, rev: Revision) -> IndexEntry {
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273 let start = rev.0 as usize * INDEX_ENTRY_SIZE;
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274 let end = start + INDEX_ENTRY_SIZE;
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275 let bytes = &self.bytes[start..end];
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276
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277 // Override the offset of the first revision as its bytes are used
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278 // for the index's metadata (saving space because it is always 0)
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279 let offset_override = if rev == Revision(0) { Some(0) } else { None };
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280
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281 IndexEntry {
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282 bytes,
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283 offset_override,
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284 }
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285 }
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286 }
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287
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288 impl super::RevlogIndex for Index {
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289 fn len(&self) -> usize {
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290 self.len()
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291 }
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292
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293 fn node(&self, rev: Revision) -> Option<&Node> {
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294 self.get_entry(rev).map(|entry| entry.hash())
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295 }
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296 }
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297
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298 #[derive(Debug)]
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299 pub struct IndexEntry<'a> {
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300 bytes: &'a [u8],
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301 /// Allows to override the offset value of the entry.
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302 ///
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303 /// For interleaved index and data, the offset stored in the index
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304 /// corresponds to the separated data offset.
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305 /// It has to be overridden with the actual offset in the interleaved
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306 /// index which is just after the index block.
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307 ///
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308 /// For separated index and data, the offset stored in the first index
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309 /// entry is mixed with the index headers.
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310 /// It has to be overridden with 0.
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311 offset_override: Option<usize>,
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312 }
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313
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314 impl<'a> IndexEntry<'a> {
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315 /// Return the offset of the data.
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316 pub fn offset(&self) -> usize {
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317 if let Some(offset_override) = self.offset_override {
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318 offset_override
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319 } else {
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320 let mut bytes = [0; 8];
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321 bytes[2..8].copy_from_slice(&self.bytes[0..=5]);
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322 BigEndian::read_u64(&bytes[..]) as usize
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323 }
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324 }
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325
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326 pub fn flags(&self) -> u16 {
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327 BigEndian::read_u16(&self.bytes[6..=7])
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328 }
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329
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330 /// Return the compressed length of the data.
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331 pub fn compressed_len(&self) -> u32 {
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332 BigEndian::read_u32(&self.bytes[8..=11])
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333 }
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334
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335 /// Return the uncompressed length of the data.
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336 pub fn uncompressed_len(&self) -> i32 {
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337 BigEndian::read_i32(&self.bytes[12..=15])
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338 }
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339
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340 /// Return the revision upon which the data has been derived.
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341 pub fn base_revision_or_base_of_delta_chain(&self) -> UncheckedRevision {
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342 // TODO Maybe return an Option when base_revision == rev?
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343 // Requires to add rev to IndexEntry
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344
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345 BigEndian::read_i32(&self.bytes[16..]).into()
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346 }
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347
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348 pub fn link_revision(&self) -> UncheckedRevision {
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349 BigEndian::read_i32(&self.bytes[20..]).into()
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350 }
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351
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352 pub fn p1(&self) -> UncheckedRevision {
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353 BigEndian::read_i32(&self.bytes[24..]).into()
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354 }
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355
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356 pub fn p2(&self) -> UncheckedRevision {
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357 BigEndian::read_i32(&self.bytes[28..]).into()
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358 }
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359
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360 /// Return the hash of revision's full text.
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361 ///
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362 /// Currently, SHA-1 is used and only the first 20 bytes of this field
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363 /// are used.
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364 pub fn hash(&self) -> &'a Node {
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365 (&self.bytes[32..52]).try_into().unwrap()
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366 }
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367 }
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368
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369 #[cfg(test)]
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370 mod tests {
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371 use super::*;
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372 use crate::node::NULL_NODE;
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373
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374 #[cfg(test)]
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375 #[derive(Debug, Copy, Clone)]
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376 pub struct IndexEntryBuilder {
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377 is_first: bool,
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378 is_inline: bool,
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379 is_general_delta: bool,
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380 version: u16,
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381 offset: usize,
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382 compressed_len: usize,
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383 uncompressed_len: usize,
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384 base_revision_or_base_of_delta_chain: Revision,
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385 link_revision: Revision,
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386 p1: Revision,
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387 p2: Revision,
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388 node: Node,
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389 }
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390
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391 #[cfg(test)]
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392 impl IndexEntryBuilder {
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393 #[allow(clippy::new_without_default)]
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394 pub fn new() -> Self {
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395 Self {
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396 is_first: false,
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397 is_inline: false,
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398 is_general_delta: true,
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399 version: 1,
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400 offset: 0,
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401 compressed_len: 0,
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402 uncompressed_len: 0,
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403 base_revision_or_base_of_delta_chain: Revision(0),
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404 link_revision: Revision(0),
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405 p1: NULL_REVISION,
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406 p2: NULL_REVISION,
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407 node: NULL_NODE,
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408 }
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409 }
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410
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411 pub fn is_first(&mut self, value: bool) -> &mut Self {
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412 self.is_first = value;
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413 self
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414 }
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415
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416 pub fn with_inline(&mut self, value: bool) -> &mut Self {
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417 self.is_inline = value;
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418 self
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419 }
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420
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421 pub fn with_general_delta(&mut self, value: bool) -> &mut Self {
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422 self.is_general_delta = value;
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423 self
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424 }
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425
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426 pub fn with_version(&mut self, value: u16) -> &mut Self {
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427 self.version = value;
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428 self
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429 }
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430
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431 pub fn with_offset(&mut self, value: usize) -> &mut Self {
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432 self.offset = value;
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433 self
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434 }
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435
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436 pub fn with_compressed_len(&mut self, value: usize) -> &mut Self {
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437 self.compressed_len = value;
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438 self
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439 }
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440
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441 pub fn with_uncompressed_len(&mut self, value: usize) -> &mut Self {
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442 self.uncompressed_len = value;
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443 self
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444 }
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445
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446 pub fn with_base_revision_or_base_of_delta_chain(
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447 &mut self,
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448 value: Revision,
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
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449 ) -> &mut Self {
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450 self.base_revision_or_base_of_delta_chain = value;
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451 self
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452 }
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453
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454 pub fn with_link_revision(&mut self, value: Revision) -> &mut Self {
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455 self.link_revision = value;
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diff changeset
456 self
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457 }
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458
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
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459 pub fn with_p1(&mut self, value: Revision) -> &mut Self {
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diff changeset
460 self.p1 = value;
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461 self
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462 }
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
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463
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
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464 pub fn with_p2(&mut self, value: Revision) -> &mut Self {
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diff changeset
465 self.p2 = value;
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466 self
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467 }
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468
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
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diff changeset
469 pub fn with_node(&mut self, value: Node) -> &mut Self {
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diff changeset
470 self.node = value;
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471 self
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472 }
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
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diff changeset
473
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diff changeset
474 pub fn build(&self) -> Vec<u8> {
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Antoine Cezar <antoine.cezar@octobus.net>
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diff changeset
475 let mut bytes = Vec::with_capacity(INDEX_ENTRY_SIZE);
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diff changeset
476 if self.is_first {
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Antoine Cezar <antoine.cezar@octobus.net>
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diff changeset
477 bytes.extend(&match (self.is_general_delta, self.is_inline) {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
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diff changeset
478 (false, false) => [0u8, 0],
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diff changeset
479 (false, true) => [0u8, 1],
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diff changeset
480 (true, false) => [0u8, 2],
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diff changeset
481 (true, true) => [0u8, 3],
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diff changeset
482 });
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diff changeset
483 bytes.extend(&self.version.to_be_bytes());
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diff changeset
484 // Remaining offset bytes.
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diff changeset
485 bytes.extend(&[0u8; 2]);
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
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diff changeset
486 } else {
46887
6d5a26e94d9e unit-tests: Fix `cargo test` on 32-bit platforms
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diff changeset
487 // Offset stored on 48 bits (6 bytes)
6d5a26e94d9e unit-tests: Fix `cargo test` on 32-bit platforms
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diff changeset
488 bytes.extend(&(self.offset as u64).to_be_bytes()[2..]);
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489 }
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Antoine Cezar <antoine.cezar@octobus.net>
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diff changeset
490 bytes.extend(&[0u8; 2]); // Revision flags.
46887
6d5a26e94d9e unit-tests: Fix `cargo test` on 32-bit platforms
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diff changeset
491 bytes.extend(&(self.compressed_len as u32).to_be_bytes());
6d5a26e94d9e unit-tests: Fix `cargo test` on 32-bit platforms
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diff changeset
492 bytes.extend(&(self.uncompressed_len as u32).to_be_bytes());
48458
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
Arseniy Alekseyev <aalekseyev@janestreet.com>
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diff changeset
493 bytes.extend(
50976
4c5f6e95df84 rust: make `Revision` a newtype
Rapha?l Gom?s <rgomes@octobus.net>
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diff changeset
494 &self.base_revision_or_base_of_delta_chain.0.to_be_bytes(),
48458
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
Arseniy Alekseyev <aalekseyev@janestreet.com>
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diff changeset
495 );
50976
4c5f6e95df84 rust: make `Revision` a newtype
Rapha?l Gom?s <rgomes@octobus.net>
parents: 50975
diff changeset
496 bytes.extend(&self.link_revision.0.to_be_bytes());
4c5f6e95df84 rust: make `Revision` a newtype
Rapha?l Gom?s <rgomes@octobus.net>
parents: 50975
diff changeset
497 bytes.extend(&self.p1.0.to_be_bytes());
4c5f6e95df84 rust: make `Revision` a newtype
Rapha?l Gom?s <rgomes@octobus.net>
parents: 50975
diff changeset
498 bytes.extend(&self.p2.0.to_be_bytes());
49093
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
Martin von Zweigbergk <martinvonz@google.com>
parents: 49092
diff changeset
499 bytes.extend(self.node.as_bytes());
2a9a55ffe24f rust-revlog: make `IndexEntryBuilder` build a whole entry
Martin von Zweigbergk <martinvonz@google.com>
parents: 49092
diff changeset
500 bytes.extend(vec![0u8; 12]);
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
501 bytes
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
502 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
503 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
504
48457
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
505 pub fn is_inline(index_bytes: &[u8]) -> bool {
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
506 IndexHeader::parse(index_bytes)
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
507 .expect("too short")
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
508 .format_flags()
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
509 .is_inline()
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
510 }
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
511
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
512 pub fn uses_generaldelta(index_bytes: &[u8]) -> bool {
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
513 IndexHeader::parse(index_bytes)
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
514 .expect("too short")
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
515 .format_flags()
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
516 .uses_generaldelta()
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
517 }
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
518
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
519 pub fn get_version(index_bytes: &[u8]) -> u16 {
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
520 IndexHeader::parse(index_bytes)
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
521 .expect("too short")
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
522 .format_version()
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
523 }
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
524
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
525 #[test]
48457
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
526 fn flags_when_no_inline_flag_test() {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
527 let bytes = IndexEntryBuilder::new()
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
528 .is_first(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
529 .with_general_delta(false)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
530 .with_inline(false)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
531 .build();
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
532
49930
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
533 assert!(!is_inline(&bytes));
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
534 assert!(!uses_generaldelta(&bytes));
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
535 }
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
536
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
537 #[test]
48457
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
538 fn flags_when_inline_flag_test() {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
539 let bytes = IndexEntryBuilder::new()
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
540 .is_first(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
541 .with_general_delta(false)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
542 .with_inline(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
543 .build();
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
544
49930
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
545 assert!(is_inline(&bytes));
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
546 assert!(!uses_generaldelta(&bytes));
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
547 }
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
548
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
549 #[test]
48457
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
550 fn flags_when_inline_and_generaldelta_flags_test() {
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
551 let bytes = IndexEntryBuilder::new()
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
552 .is_first(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
553 .with_general_delta(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
554 .with_inline(true)
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
555 .build();
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
556
49930
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
557 assert!(is_inline(&bytes));
e98fd81bb151 rust-clippy: fix most warnings in `hg-core`
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49926
diff changeset
558 assert!(uses_generaldelta(&bytes));
45601
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
559 }
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
560
900b9b79b99c hg-core: make `Index` owner of its bytes (D8958#inline-14994 followup 1/2)
Antoine cezar<acezar@chwitlabs.fr>
parents: 45593
diff changeset
561 #[test]
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
562 fn test_offset() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
563 let bytes = IndexEntryBuilder::new().with_offset(1).build();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
564 let entry = IndexEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
565 bytes: &bytes,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
566 offset_override: None,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
567 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
568
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
569 assert_eq!(entry.offset(), 1)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
570 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
571
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
572 #[test]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
573 fn test_with_overridden_offset() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
574 let bytes = IndexEntryBuilder::new().with_offset(1).build();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
575 let entry = IndexEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
576 bytes: &bytes,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
577 offset_override: Some(2),
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
578 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
579
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
580 assert_eq!(entry.offset(), 2)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
581 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
582
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
583 #[test]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
584 fn test_compressed_len() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
585 let bytes = IndexEntryBuilder::new().with_compressed_len(1).build();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
586 let entry = IndexEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
587 bytes: &bytes,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
588 offset_override: None,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
589 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
590
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
591 assert_eq!(entry.compressed_len(), 1)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
592 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
593
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
594 #[test]
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
595 fn test_uncompressed_len() {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
596 let bytes = IndexEntryBuilder::new().with_uncompressed_len(1).build();
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
597 let entry = IndexEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
598 bytes: &bytes,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
599 offset_override: None,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
600 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
601
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
602 assert_eq!(entry.uncompressed_len(), 1)
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
603 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
604
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
605 #[test]
48458
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48457
diff changeset
606 fn test_base_revision_or_base_of_delta_chain() {
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48457
diff changeset
607 let bytes = IndexEntryBuilder::new()
50976
4c5f6e95df84 rust: make `Revision` a newtype
Rapha?l Gom?s <rgomes@octobus.net>
parents: 50975
diff changeset
608 .with_base_revision_or_base_of_delta_chain(Revision(1))
48458
96ea4db4741b rhg: fix a crash on non-generaldelta revlogs
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48457
diff changeset
609 .build();
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
610 let entry = IndexEntry {
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
611 bytes: &bytes,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
612 offset_override: None,
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
613 };
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
614
50974
1928b770e3e7 rust: use the new `UncheckedRevision` everywhere applicable
Rapha?l Gom?s <rgomes@octobus.net>
parents: 49930
diff changeset
615 assert_eq!(entry.base_revision_or_base_of_delta_chain(), 1.into())
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
diff changeset
616 }
48457
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
617
1fb3615dfce2 rhg: centralize index header parsing
Arseniy Alekseyev <aalekseyev@janestreet.com>
parents: 48226
diff changeset
618 #[test]
49093
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619 fn link_revision_test() {
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620 let bytes = IndexEntryBuilder::new()
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621 .with_link_revision(Revision(123))
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622 .build();
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623
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624 let entry = IndexEntry {
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625 bytes: &bytes,
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626 offset_override: None,
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627 };
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628
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Rapha?l Gom?s <rgomes@octobus.net>
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629 assert_eq!(entry.link_revision(), 123.into());
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630 }
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631
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632 #[test]
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633 fn p1_test() {
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634 let bytes = IndexEntryBuilder::new().with_p1(Revision(123)).build();
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635
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636 let entry = IndexEntry {
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637 bytes: &bytes,
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Martin von Zweigbergk <martinvonz@google.com>
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638 offset_override: None,
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639 };
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640
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641 assert_eq!(entry.p1(), 123.into());
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642 }
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643
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644 #[test]
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645 fn p2_test() {
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646 let bytes = IndexEntryBuilder::new().with_p2(Revision(123)).build();
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647
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648 let entry = IndexEntry {
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649 bytes: &bytes,
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650 offset_override: None,
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651 };
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652
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653 assert_eq!(entry.p2(), 123.into());
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654 }
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655
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656 #[test]
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657 fn node_test() {
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658 let node = Node::from_hex("0123456789012345678901234567890123456789")
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659 .unwrap();
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660 let bytes = IndexEntryBuilder::new().with_node(node).build();
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661
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662 let entry = IndexEntry {
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663 bytes: &bytes,
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664 offset_override: None,
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665 };
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666
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667 assert_eq!(*entry.hash(), node);
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668 }
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669
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670 #[test]
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671 fn version_test() {
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672 let bytes = IndexEntryBuilder::new()
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673 .is_first(true)
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674 .with_version(2)
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675 .build();
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676
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677 assert_eq!(get_version(&bytes), 2)
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678 }
45526
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
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679 }
26c53ee51c68 hg-core: Add a limited read only `revlog` implementation
Antoine Cezar <antoine.cezar@octobus.net>
parents:
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680
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Antoine Cezar <antoine.cezar@octobus.net>
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681 #[cfg(test)]
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682 pub use tests::IndexEntryBuilder;