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</pre><pre class='rust '>
<span class='comment'>// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT</span>
<span class='comment'>// file at the top-level directory of this distribution and at</span>
<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span>
<span class='comment'>//</span>
<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class='comment'>// option. This file may not be copied, modified, or distributed</span>
<span class='comment'>// except according to those terms.</span>
<span class='doccomment'>//! Support code for encoding and decoding types.</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! # Usage</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! This crate is [on crates.io](https://crates.io/crates/rustc-serialize) and</span>
<span class='doccomment'>//! can be used by adding `rustc-serialize` to the dependencies in your</span>
<span class='doccomment'>//! project's `Cargo.toml`.</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```toml</span>
<span class='doccomment'>//! [dependencies]</span>
<span class='doccomment'>//! rustc-serialize = "0.3"</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! and this to your crate root:</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```rust</span>
<span class='doccomment'>//! extern crate rustc_serialize;</span>
<span class='doccomment'>//! ```</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>doc</span>(<span class='ident'>html_logo_url</span> <span class='op'>=</span> <span class='string'>"https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png"</span>,
<span class='ident'>html_favicon_url</span> <span class='op'>=</span> <span class='string'>"https://www.rust-lang.org/favicon.ico"</span>,
<span class='ident'>html_root_url</span> <span class='op'>=</span> <span class='string'>"https://doc.rust-lang.org/rustc-serialize/"</span>)]</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>cfg_attr</span>(<span class='ident'>test</span>, <span class='ident'>deny</span>(<span class='ident'>warnings</span>))]</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>allow</span>(<span class='ident'>trivial_numeric_casts</span>)]</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>cfg_attr</span>(<span class='ident'>rust_build</span>, <span class='ident'>feature</span>(<span class='ident'>staged_api</span>))]</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>cfg_attr</span>(<span class='ident'>rust_build</span>, <span class='ident'>staged_api</span>)]</span>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>cfg_attr</span>(<span class='ident'>rust_build</span>,
<span class='ident'>unstable</span>(<span class='ident'>feature</span> <span class='op'>=</span> <span class='string'>"rustc_private"</span>,
<span class='ident'>reason</span> <span class='op'>=</span> <span class='string'>"use the crates.io `rustc-serialize` library instead"</span>))]</span>
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span> <span class='kw'>extern</span> <span class='kw'>crate</span> <span class='ident'>rand</span>;
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>serialize</span>::{<span class='ident'>Decoder</span>, <span class='ident'>Encoder</span>, <span class='ident'>Decodable</span>, <span class='ident'>Encodable</span>,
<span class='ident'>DecoderHelpers</span>, <span class='ident'>EncoderHelpers</span>};
<span class='comment'>// Limit collections from allocating more than</span>
<span class='comment'>// 1 MB for calls to `with_capacity`.</span>
<span class='kw'>fn</span> <span class='ident'>cap_capacity</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='ident'>given_len</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>usize</span> {
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>cmp</span>::<span class='ident'>min</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>mem</span>::<span class='ident'>size_of</span>;
<span class='kw'>const</span> <span class='ident'>PRE_ALLOCATE_CAP</span>: <span class='ident'>usize</span> <span class='op'>=</span> <span class='number'>0x100000</span>;
<span class='kw'>match</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='ident'>T</span><span class='op'>></span>() {
<span class='number'>0</span> <span class='op'>=></span> <span class='ident'>min</span>(<span class='ident'>given_len</span>, <span class='ident'>PRE_ALLOCATE_CAP</span>),
<span class='ident'>n</span> <span class='op'>=></span> <span class='ident'>min</span>(<span class='ident'>given_len</span>, <span class='ident'>PRE_ALLOCATE_CAP</span> <span class='op'>/</span> <span class='ident'>n</span>)
}
}
<span class='kw'>mod</span> <span class='ident'>serialize</span>;
<span class='kw'>mod</span> <span class='ident'>collection_impls</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>base64</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>hex</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>json</span>;
<span class='kw'>mod</span> <span class='ident'>rustc_serialize</span> {
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='ident'>serialize</span>::<span class='kw-2'>*</span>;
}
</pre>
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