| <!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 `/root/.cargo/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/ring/src/io/der_writer.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>der_writer.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="../../../ring/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="../../../ring/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="comment">// Copyright 2018 Brian Smith. |
| // |
| // Permission to use, copy, modify, and/or distribute this software for any |
| // purpose with or without fee is hereby granted, provided that the above |
| // copyright notice and this permission notice appear in all copies. |
| // |
| // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES |
| // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY |
| // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| </span><span class="kw">use super</span>::{der::<span class="kw-2">*</span>, writer::<span class="kw-2">*</span>, <span class="kw-2">*</span>}; |
| <span class="kw">use </span>alloc::boxed::Box; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>write_positive_integer(output: <span class="kw-2">&mut </span><span class="kw">dyn </span>Accumulator, value: <span class="kw-2">&</span>Positive) { |
| <span class="kw">let </span>first_byte = value.first_byte(); |
| <span class="kw">let </span>value = value.big_endian_without_leading_zero_as_input(); |
| write_tlv(output, Tag::Integer, |output| { |
| <span class="kw">if </span>(first_byte & <span class="number">0x80</span>) != <span class="number">0 </span>{ |
| output.write_byte(<span class="number">0</span>); <span class="comment">// Disambiguate negative number. |
| </span>} |
| write_copy(output, value) |
| }) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>write_all(tag: Tag, write_value: <span class="kw-2">&</span><span class="kw">dyn </span>Fn(<span class="kw-2">&mut </span><span class="kw">dyn </span>Accumulator)) -> Box<[u8]> { |
| <span class="kw">let </span>length = { |
| <span class="kw">let </span><span class="kw-2">mut </span>length = LengthMeasurement::zero(); |
| write_tlv(<span class="kw-2">&mut </span>length, tag, write_value); |
| length |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>output = Writer::with_capacity(length); |
| write_tlv(<span class="kw-2">&mut </span>output, tag, write_value); |
| |
| output.into() |
| } |
| |
| <span class="kw">fn </span>write_tlv<F>(output: <span class="kw-2">&mut </span><span class="kw">dyn </span>Accumulator, tag: Tag, write_value: F) |
| <span class="kw">where |
| </span>F: Fn(<span class="kw-2">&mut </span><span class="kw">dyn </span>Accumulator), |
| { |
| <span class="kw">let </span>length: usize = { |
| <span class="kw">let </span><span class="kw-2">mut </span>length = LengthMeasurement::zero(); |
| write_value(<span class="kw-2">&mut </span>length); |
| length.into() |
| }; |
| |
| output.write_byte(tag <span class="kw">as </span>u8); |
| <span class="kw">if </span>length < <span class="number">0x80 </span>{ |
| output.write_byte(length <span class="kw">as </span>u8); |
| } <span class="kw">else if </span>length < <span class="number">0x1_00 </span>{ |
| output.write_byte(<span class="number">0x81</span>); |
| output.write_byte(length <span class="kw">as </span>u8); |
| } <span class="kw">else if </span>length < <span class="number">0x1_00_00 </span>{ |
| output.write_byte(<span class="number">0x82</span>); |
| output.write_byte((length / <span class="number">0x1_00</span>) <span class="kw">as </span>u8); |
| output.write_byte(length <span class="kw">as </span>u8); |
| } <span class="kw">else </span>{ |
| <span class="macro">unreachable!</span>(); |
| }; |
| |
| write_value(output); |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="ring" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |