pub struct FreeListPages { /* private fields */ }
Expand description
§Free page list (8 Bytes) => First(4 Bytes) + TotalPages (4 Bytes)
Unused pages in the database file are stored on a freelist.
Implementations§
Source§impl FreeListPages
impl FreeListPages
pub fn first(&self) -> &FreeListPagesFirstTrunkPage
Sourcepub fn total(&self) -> &FreeListPagesTotalPages
pub fn total(&self) -> &FreeListPagesTotalPages
Examples found in repository?
examples/sqlite_info.rs (line 88)
36 fn print_sqlite_info(conn: &SqliteConnection) -> AppResult<()> {
37 const LABEL_WIDTH: usize = 21;
38
39 // TODO:
40 let sqlite_header = conn.runtime().header();
41
42 let mut output = "".to_owned();
43
44 output.push_str(&format!(
45 "{label: <w$}{value}\n",
46 w = LABEL_WIDTH,
47 label = "database page size:",
48 value = u32::from(sqlite_header.page_size())
49 ));
50 output.push_str(&format!(
51 "{label: <w$}{value}\n",
52 w = LABEL_WIDTH,
53 label = "write format:",
54 value =
55 u8::from(sqlite_header.file_format_version_numbers().write_version())
56 ));
57 output.push_str(&format!(
58 "{label: <w$}{value}\n",
59 w = LABEL_WIDTH,
60 label = "read format:",
61 value =
62 u8::from(sqlite_header.file_format_version_numbers().read_version())
63 ));
64 output.push_str(&format!(
65 "{label: <w$}{value}\n",
66 w = LABEL_WIDTH,
67 label = "reserved bytes:",
68 value = **sqlite_header.reserved_bytes_per_page()
69 ));
70 output.push_str(&format!(
71 "{label: <w$}{value}\n",
72 w = LABEL_WIDTH,
73 label = "file change counter:",
74 value = **sqlite_header.file_change_counter()
75 ));
76
77 output.push_str(&format!(
78 "{label: <w$}{value}\n",
79 w = LABEL_WIDTH,
80 label = "database page count:",
81 value = **sqlite_header.db_filesize_in_pages()
82 ));
83
84 output.push_str(&format!(
85 "{label: <w$}{value}\n",
86 w = LABEL_WIDTH,
87 label = "freelist page count:",
88 value = **sqlite_header.freelist_pages().total()
89 ));
90
91 output.push_str(&format!(
92 "{label: <w$}{value}\n",
93 w = LABEL_WIDTH,
94 label = "schema cookie:",
95 value = **sqlite_header.schema_cookie()
96 ));
97
98 output.push_str(&format!(
99 "{label: <w$}{value}\n",
100 w = LABEL_WIDTH,
101 label = "schema format:",
102 value = u32::from(sqlite_header.schema_format())
103 ));
104
105 output.push_str(&format!(
106 "{label: <w$}{value}\n",
107 w = LABEL_WIDTH,
108 label = "default cache size:",
109 value = **sqlite_header.suggested_cache_size()
110 ));
111
112 output.push_str(&format!(
113 "{label: <w$}{value}\n",
114 w = LABEL_WIDTH,
115 label = "autovacuum top root:",
116 value = **sqlite_header
117 .incremental_vacuum_settings()
118 .largest_root_btree_page()
119 ));
120
121 output.push_str(&format!(
122 "{label: <w$}{value}\n",
123 w = LABEL_WIDTH,
124 label = "incremental vacuum:",
125 value = u32::from(
126 sqlite_header
127 .incremental_vacuum_settings()
128 .incremental_vacuum_mode()
129 )
130 ));
131
132 output.push_str(&format!(
133 "{label: <w$}{value}\n",
134 w = LABEL_WIDTH,
135 label = "text encoding:",
136 value = sqlite_header.database_text_encoding()
137 ));
138
139 output.push_str(&format!(
140 "{label: <w$}{value}\n",
141 w = LABEL_WIDTH,
142 label = "user version:",
143 value = **sqlite_header.user_version()
144 ));
145
146 output.push_str(&format!(
147 "{label: <w$}{value}\n",
148 w = LABEL_WIDTH,
149 label = "application id:",
150 value = **sqlite_header.application_id()
151 ));
152
153 output.push_str(&format!(
154 "{label: <w$}{value}\n",
155 w = LABEL_WIDTH,
156 label = "software version:",
157 value = **sqlite_header.write_library_version()
158 ));
159
160 println!("{output}");
161 Ok(())
162 }
Trait Implementations§
Source§impl Debug for FreeListPages
impl Debug for FreeListPages
Source§impl Default for FreeListPages
impl Default for FreeListPages
Source§fn default() -> FreeListPages
fn default() -> FreeListPages
Returns the “default value” for a type. Read more
Auto Trait Implementations§
impl Freeze for FreeListPages
impl RefUnwindSafe for FreeListPages
impl Send for FreeListPages
impl Sync for FreeListPages
impl Unpin for FreeListPages
impl UnwindSafe for FreeListPages
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more