| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `common/rusty_leveldb_sgx/src/table_builder.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>table_builder.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../rusty_leveldb/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../rusty_leveldb/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::block::BlockContents; |
| <span class="kw">use </span><span class="kw">crate</span>::block_builder::BlockBuilder; |
| <span class="kw">use </span><span class="kw">crate</span>::blockhandle::BlockHandle; |
| <span class="kw">use </span><span class="kw">crate</span>::cmp::InternalKeyCmp; |
| <span class="kw">use </span><span class="kw">crate</span>::error::Result; |
| <span class="kw">use </span><span class="kw">crate</span>::filter::{InternalFilterPolicy, NoFilterPolicy}; |
| <span class="kw">use </span><span class="kw">crate</span>::filter_block::FilterBlockBuilder; |
| <span class="kw">use </span><span class="kw">crate</span>::key_types::InternalKey; |
| <span class="kw">use </span><span class="kw">crate</span>::log::mask_crc; |
| <span class="kw">use </span><span class="kw">crate</span>::options::{CompressionType, Options}; |
| |
| <span class="kw">use </span>std::cmp::Ordering; |
| <span class="kw">use </span>std::io::Write; |
| <span class="kw">use </span>std::rc::Rc; |
| |
| <span class="kw">use </span>crc::crc32; |
| <span class="kw">use </span>crc::Hasher32; |
| <span class="kw">use </span>integer_encoding::FixedIntWriter; |
| <span class="kw">use </span>snap::Encoder; |
| |
| <span class="kw">pub const </span>FOOTER_LENGTH: usize = <span class="number">40</span>; |
| <span class="kw">pub const </span>FULL_FOOTER_LENGTH: usize = FOOTER_LENGTH + <span class="number">8</span>; |
| <span class="kw">pub const </span>MAGIC_FOOTER_NUMBER: u64 = <span class="number">0xdb4775248b80fb57</span>; |
| <span class="kw">pub const </span>MAGIC_FOOTER_ENCODED: [u8; <span class="number">8</span>] = [<span class="number">0x57</span>, <span class="number">0xfb</span>, <span class="number">0x80</span>, <span class="number">0x8b</span>, <span class="number">0x24</span>, <span class="number">0x75</span>, <span class="number">0x47</span>, <span class="number">0xdb</span>]; |
| |
| <span class="kw">pub const </span>TABLE_BLOCK_COMPRESS_LEN: usize = <span class="number">1</span>; |
| <span class="kw">pub const </span>TABLE_BLOCK_CKSUM_LEN: usize = <span class="number">4</span>; |
| |
| <span class="doccomment">/// Footer is a helper for encoding/decoding a table footer. |
| </span><span class="attribute">#[derive(Debug, Clone)] |
| </span><span class="kw">pub struct </span>Footer { |
| <span class="kw">pub </span>meta_index: BlockHandle, |
| <span class="kw">pub </span>index: BlockHandle, |
| } |
| |
| <span class="doccomment">/// A Table footer contains a pointer to the metaindex block, another pointer to the index block, |
| /// and a magic number: |
| /// [ { table data ... , METAINDEX blockhandle, INDEX blockhandle, PADDING bytes } = 40 bytes, |
| /// MAGIC_FOOTER_ENCODED ] |
| </span><span class="kw">impl </span>Footer { |
| <span class="kw">pub fn </span>new(metaix: BlockHandle, index: BlockHandle) -> Footer { |
| Footer { |
| meta_index: metaix, |
| index, |
| } |
| } |
| |
| <span class="kw">pub fn </span>decode(from: <span class="kw-2">&</span>[u8]) -> Footer { |
| <span class="macro">assert!</span>(from.len() >= FULL_FOOTER_LENGTH); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>from[FOOTER_LENGTH..], <span class="kw-2">&</span>MAGIC_FOOTER_ENCODED); |
| <span class="kw">let </span>(meta, metalen) = BlockHandle::decode(<span class="kw-2">&</span>from[<span class="number">0</span>..]); |
| <span class="kw">let </span>(ix, <span class="kw">_</span>) = BlockHandle::decode(<span class="kw-2">&</span>from[metalen..]); |
| |
| Footer { |
| meta_index: meta, |
| index: ix, |
| } |
| } |
| |
| <span class="kw">pub fn </span>encode(<span class="kw-2">&</span><span class="self">self</span>, to: <span class="kw-2">&mut </span>[u8]) { |
| <span class="macro">assert!</span>(to.len() >= FOOTER_LENGTH + <span class="number">8</span>); |
| |
| <span class="kw">let </span>s1 = <span class="self">self</span>.meta_index.encode_to(to); |
| <span class="kw">let </span>s2 = <span class="self">self</span>.index.encode_to(<span class="kw-2">&mut </span>to[s1..]); |
| |
| <span class="kw">for </span>i <span class="kw">in </span>s1 + s2..FOOTER_LENGTH { |
| to[i] = <span class="number">0</span>; |
| } |
| <span class="kw">for </span>i <span class="kw">in </span>FOOTER_LENGTH..FULL_FOOTER_LENGTH { |
| to[i] = MAGIC_FOOTER_ENCODED[i - FOOTER_LENGTH]; |
| } |
| } |
| } |
| |
| <span class="doccomment">/// A table consists of DATA BLOCKs, META BLOCKs, a METAINDEX BLOCK, an INDEX BLOCK and a FOOTER. |
| /// |
| /// DATA BLOCKs, META BLOCKs, INDEX BLOCK and METAINDEX BLOCK are built using the code in |
| /// the `block` module. |
| /// |
| /// The FOOTER consists of a BlockHandle that points to the metaindex block, another pointing to |
| /// the index block, padding to fill up to 40 B and at the end the 8B magic number |
| /// 0xdb4775248b80fb57. |
| |
| </span><span class="kw">pub struct </span>TableBuilder<Dst: Write> { |
| opt: Options, |
| dst: Dst, |
| |
| offset: usize, |
| num_entries: usize, |
| prev_block_last_key: Vec<u8>, |
| |
| data_block: <span class="prelude-ty">Option</span><BlockBuilder>, |
| index_block: <span class="prelude-ty">Option</span><BlockBuilder>, |
| filter_block: <span class="prelude-ty">Option</span><FilterBlockBuilder>, |
| } |
| |
| <span class="kw">impl</span><Dst: Write> TableBuilder<Dst> { |
| <span class="kw">pub fn </span>new_no_filter(<span class="kw-2">mut </span>opt: Options, dst: Dst) -> TableBuilder<Dst> { |
| opt.filter_policy = Rc::new(Box::new(NoFilterPolicy::new())); |
| TableBuilder::new(opt, dst) |
| } |
| } |
| |
| <span class="doccomment">/// TableBuilder is used for building a new SSTable. It groups entries into blocks, |
| /// calculating checksums and bloom filters. |
| </span><span class="kw">impl</span><Dst: Write> TableBuilder<Dst> { |
| <span class="doccomment">/// Create a new table builder. |
| /// The comparator in opt will be wrapped in a InternalKeyCmp, and the filter policy |
| /// in an InternalFilterPolicy. |
| </span><span class="kw">pub fn </span>new(<span class="kw-2">mut </span>opt: Options, dst: Dst) -> TableBuilder<Dst> { |
| opt.cmp = Rc::new(Box::new(InternalKeyCmp(opt.cmp.clone()))); |
| opt.filter_policy = Rc::new(Box::new(InternalFilterPolicy::new(opt.filter_policy))); |
| TableBuilder::new_raw(opt, dst) |
| } |
| |
| <span class="doccomment">/// Like new(), but doesn't wrap the comparator in an InternalKeyCmp (for testing) |
| </span><span class="kw">pub fn </span>new_raw(opt: Options, dst: Dst) -> TableBuilder<Dst> { |
| TableBuilder { |
| opt: opt.clone(), |
| dst, |
| offset: <span class="number">0</span>, |
| prev_block_last_key: <span class="macro">vec!</span>[], |
| num_entries: <span class="number">0</span>, |
| data_block: <span class="prelude-val">Some</span>(BlockBuilder::new(opt.clone())), |
| filter_block: <span class="prelude-val">Some</span>(FilterBlockBuilder::new(opt.filter_policy.clone())), |
| index_block: <span class="prelude-val">Some</span>(BlockBuilder::new(opt)), |
| } |
| } |
| |
| <span class="kw">pub fn </span>entries(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.num_entries |
| } |
| |
| <span class="kw">pub fn </span>size_estimate(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>size = <span class="number">0</span>; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>b) = <span class="self">self</span>.data_block { |
| size += b.size_estimate(); |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>b) = <span class="self">self</span>.index_block { |
| size += b.size_estimate(); |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>b) = <span class="self">self</span>.filter_block { |
| size += b.size_estimate(); |
| } |
| size + <span class="self">self</span>.offset + FULL_FOOTER_LENGTH |
| } |
| |
| <span class="doccomment">/// Add a key to the table. The key as to be lexically greater or equal to the last one added. |
| </span><span class="kw">pub fn </span>add<<span class="lifetime">'a</span>>(<span class="kw-2">&mut </span><span class="self">self</span>, key: InternalKey<<span class="lifetime">'a</span>>, val: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">assert!</span>(<span class="self">self</span>.data_block.is_some()); |
| |
| <span class="kw">if </span>!<span class="self">self</span>.prev_block_last_key.is_empty() { |
| <span class="macro">assert!</span>(<span class="self">self</span>.opt.cmp.cmp(<span class="kw-2">&</span><span class="self">self</span>.prev_block_last_key, key) == Ordering::Less); |
| } |
| |
| <span class="kw">if </span><span class="self">self</span>.data_block.as_ref().unwrap().size_estimate() > <span class="self">self</span>.opt.block_size { |
| <span class="self">self</span>.write_data_block(key)<span class="question-mark">?</span>; |
| } |
| |
| <span class="kw">let </span>dblock = <span class="kw-2">&mut </span><span class="self">self</span>.data_block.as_mut().unwrap(); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref mut </span>fblock) = <span class="self">self</span>.filter_block { |
| fblock.add_key(key); |
| } |
| |
| <span class="self">self</span>.num_entries += <span class="number">1</span>; |
| dblock.add(key, val); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Writes an index entry for the current data_block where `next_key` is the first key of the |
| /// next block. |
| /// Calls write_block() for writing the block to disk. |
| </span><span class="kw">fn </span>write_data_block<<span class="lifetime">'b</span>>(<span class="kw-2">&mut </span><span class="self">self</span>, next_key: InternalKey<<span class="lifetime">'b</span>>) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">assert!</span>(<span class="self">self</span>.data_block.is_some()); |
| |
| <span class="kw">let </span>block = <span class="self">self</span>.data_block.take().unwrap(); |
| <span class="kw">let </span>sep = <span class="self">self</span>.opt.cmp.find_shortest_sep(<span class="kw-2">&</span>block.last_key(), next_key); |
| <span class="self">self</span>.prev_block_last_key = Vec::from(block.last_key()); |
| <span class="kw">let </span>contents = block.finish(); |
| |
| <span class="kw">let </span>ctype = <span class="self">self</span>.opt.compression_type; |
| <span class="kw">let </span>handle = <span class="self">self</span>.write_block(contents, ctype)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>handle_enc = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">16</span>]; |
| <span class="kw">let </span>enc_len = handle.encode_to(<span class="kw-2">&mut </span>handle_enc); |
| |
| <span class="self">self</span>.index_block |
| .as_mut() |
| .unwrap() |
| .add(<span class="kw-2">&</span>sep, <span class="kw-2">&</span>handle_enc[<span class="number">0</span>..enc_len]); |
| <span class="self">self</span>.data_block = <span class="prelude-val">Some</span>(BlockBuilder::new(<span class="self">self</span>.opt.clone())); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref mut </span>fblock) = <span class="self">self</span>.filter_block { |
| fblock.start_block(<span class="self">self</span>.offset); |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Calculates the checksum, writes the block to disk and updates the offset. |
| </span><span class="kw">fn </span>write_block(<span class="kw-2">&mut </span><span class="self">self</span>, block: BlockContents, ctype: CompressionType) -> <span class="prelude-ty">Result</span><BlockHandle> { |
| <span class="kw">let </span><span class="kw-2">mut </span>data = block; |
| <span class="kw">if </span>ctype == CompressionType::CompressionSnappy { |
| <span class="kw">let </span><span class="kw-2">mut </span>encoder = Encoder::new(); |
| data = encoder.compress_vec(<span class="kw-2">&</span>data)<span class="question-mark">?</span>; |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>digest = crc32::Digest::new(crc32::CASTAGNOLI); |
| |
| digest.write(<span class="kw-2">&</span>data); |
| digest.write(<span class="kw-2">&</span>[ctype <span class="kw">as </span>u8; TABLE_BLOCK_COMPRESS_LEN]); |
| |
| <span class="self">self</span>.dst.write(<span class="kw-2">&</span>data)<span class="question-mark">?</span>; |
| <span class="self">self</span>.dst.write(<span class="kw-2">&</span>[ctype <span class="kw">as </span>u8; TABLE_BLOCK_COMPRESS_LEN])<span class="question-mark">?</span>; |
| <span class="self">self</span>.dst.write_fixedint(mask_crc(digest.sum32()))<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>handle = BlockHandle::new(<span class="self">self</span>.offset, data.len()); |
| <span class="self">self</span>.offset += data.len() + TABLE_BLOCK_COMPRESS_LEN + TABLE_BLOCK_CKSUM_LEN; |
| |
| <span class="prelude-val">Ok</span>(handle) |
| } |
| |
| <span class="kw">pub fn </span>finish(<span class="kw-2">mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="macro">assert!</span>(<span class="self">self</span>.data_block.is_some()); |
| <span class="kw">let </span>ctype = <span class="self">self</span>.opt.compression_type; |
| |
| <span class="comment">// If there's a pending data block, write it |
| </span><span class="kw">if </span><span class="self">self</span>.data_block.as_ref().unwrap().entries() > <span class="number">0 </span>{ |
| <span class="comment">// Find a key reliably past the last key |
| </span><span class="kw">let </span>key_past_last = <span class="self">self |
| </span>.opt |
| .cmp |
| .find_short_succ(<span class="self">self</span>.data_block.as_ref().unwrap().last_key()); |
| <span class="self">self</span>.write_data_block(<span class="kw-2">&</span>key_past_last)<span class="question-mark">?</span>; |
| } |
| |
| <span class="comment">// Create metaindex block |
| </span><span class="kw">let </span><span class="kw-2">mut </span>meta_ix_block = BlockBuilder::new(<span class="self">self</span>.opt.clone()); |
| |
| <span class="kw">if </span><span class="self">self</span>.filter_block.is_some() { |
| <span class="comment">// if there's a filter block, write the filter block and add it to the metaindex block. |
| </span><span class="kw">let </span>fblock = <span class="self">self</span>.filter_block.take().unwrap(); |
| <span class="kw">let </span>filter_key = <span class="macro">format!</span>(<span class="string">"filter.{}"</span>, fblock.filter_name()); |
| <span class="kw">let </span>fblock_data = fblock.finish(); |
| <span class="kw">let </span>fblock_handle = <span class="self">self</span>.write_block(fblock_data, CompressionType::CompressionNone)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>handle_enc = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">16</span>]; |
| <span class="kw">let </span>enc_len = fblock_handle.encode_to(<span class="kw-2">&mut </span>handle_enc); |
| |
| meta_ix_block.add(filter_key.as_bytes(), <span class="kw-2">&</span>handle_enc[<span class="number">0</span>..enc_len]); |
| } |
| |
| <span class="comment">// write metaindex block |
| </span><span class="kw">let </span>meta_ix = meta_ix_block.finish(); |
| <span class="kw">let </span>meta_ix_handle = <span class="self">self</span>.write_block(meta_ix, ctype)<span class="question-mark">?</span>; |
| |
| <span class="comment">// write index block |
| </span><span class="kw">let </span>index_cont = <span class="self">self</span>.index_block.take().unwrap().finish(); |
| <span class="kw">let </span>ix_handle = <span class="self">self</span>.write_block(index_cont, ctype)<span class="question-mark">?</span>; |
| |
| <span class="comment">// write footer. |
| </span><span class="kw">let </span>footer = Footer::new(meta_ix_handle, ix_handle); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0</span>; FULL_FOOTER_LENGTH]; |
| footer.encode(<span class="kw-2">&mut </span>buf); |
| |
| <span class="self">self</span>.offset += <span class="self">self</span>.dst.write(<span class="kw-2">&</span>buf[..])<span class="question-mark">?</span>; |
| <span class="self">self</span>.dst.flush()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.offset) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"enclave_unit_test"</span>)] |
| </span><span class="kw">pub mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::blockhandle::BlockHandle; |
| <span class="kw">use </span><span class="kw">crate</span>::options; |
| <span class="kw">use </span>teaclave_test_utils::<span class="kw-2">*</span>; |
| |
| <span class="kw">pub fn </span>run_tests() -> bool { |
| <span class="macro">should_panic!</span>(test_bad_input()); |
| <span class="macro">run_tests!</span>(test_footer, test_table_builder,) |
| } |
| |
| <span class="kw">fn </span>test_footer() { |
| <span class="kw">let </span>f = Footer::new(BlockHandle::new(<span class="number">44</span>, <span class="number">4</span>), BlockHandle::new(<span class="number">55</span>, <span class="number">5</span>)); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0</span>; <span class="number">48</span>]; |
| f.encode(<span class="kw-2">&mut </span>buf[..]); |
| |
| <span class="kw">let </span>f2 = Footer::decode(<span class="kw-2">&</span>buf); |
| <span class="macro">assert_eq!</span>(f2.meta_index.offset(), <span class="number">44</span>); |
| <span class="macro">assert_eq!</span>(f2.meta_index.size(), <span class="number">4</span>); |
| <span class="macro">assert_eq!</span>(f2.index.offset(), <span class="number">55</span>); |
| <span class="macro">assert_eq!</span>(f2.index.size(), <span class="number">5</span>); |
| } |
| |
| <span class="kw">fn </span>test_table_builder() { |
| <span class="kw">let </span><span class="kw-2">mut </span>d = Vec::with_capacity(<span class="number">512</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>opt = options::for_test(); |
| opt.block_restart_interval = <span class="number">3</span>; |
| opt.compression_type = CompressionType::CompressionSnappy; |
| <span class="kw">let </span><span class="kw-2">mut </span>b = TableBuilder::new_raw(opt, <span class="kw-2">&mut </span>d); |
| |
| <span class="kw">let </span>data = <span class="macro">vec!</span>[ |
| (<span class="string">"abc"</span>, <span class="string">"def"</span>), |
| (<span class="string">"abe"</span>, <span class="string">"dee"</span>), |
| (<span class="string">"bcd"</span>, <span class="string">"asa"</span>), |
| (<span class="string">"dcc"</span>, <span class="string">"a00"</span>), |
| ]; |
| <span class="kw">let </span>data2 = <span class="macro">vec!</span>[ |
| (<span class="string">"abd"</span>, <span class="string">"def"</span>), |
| (<span class="string">"abf"</span>, <span class="string">"dee"</span>), |
| (<span class="string">"ccd"</span>, <span class="string">"asa"</span>), |
| (<span class="string">"dcd"</span>, <span class="string">"a00"</span>), |
| ]; |
| |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..data.len() { |
| b.add(<span class="kw-2">&</span>data[i].<span class="number">0</span>.as_bytes(), <span class="kw-2">&</span>data[i].<span class="number">1</span>.as_bytes()).unwrap(); |
| b.add(<span class="kw-2">&</span>data2[i].<span class="number">0</span>.as_bytes(), <span class="kw-2">&</span>data2[i].<span class="number">1</span>.as_bytes()) |
| .unwrap(); |
| } |
| |
| <span class="kw">let </span>estimate = b.size_estimate(); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">143</span>, estimate); |
| <span class="macro">assert!</span>(b.filter_block.is_some()); |
| |
| <span class="kw">let </span>actual = b.finish().unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="number">223</span>, actual); |
| } |
| |
| <span class="kw">fn </span>test_bad_input() { |
| <span class="kw">let </span><span class="kw-2">mut </span>d = Vec::with_capacity(<span class="number">512</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>opt = options::for_test(); |
| opt.block_restart_interval = <span class="number">3</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>b = TableBuilder::new_raw(opt, <span class="kw-2">&mut </span>d); |
| |
| <span class="comment">// Test two equal consecutive keys |
| </span><span class="kw">let </span>data = <span class="macro">vec!</span>[ |
| (<span class="string">"abc"</span>, <span class="string">"def"</span>), |
| (<span class="string">"abc"</span>, <span class="string">"dee"</span>), |
| (<span class="string">"bcd"</span>, <span class="string">"asa"</span>), |
| (<span class="string">"bsr"</span>, <span class="string">"a00"</span>), |
| ]; |
| |
| <span class="kw">for </span><span class="kw-2">&</span>(k, v) <span class="kw">in </span>data.iter() { |
| b.add(k.as_bytes(), v.as_bytes()).unwrap(); |
| } |
| b.finish().unwrap(); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="rusty_leveldb" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
