| <!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/registry/src/github.com-1ecc6299db9ec823/openssl-0.10.54/src/stack.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>stack.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="../../openssl/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="../../openssl/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>cfg_if::cfg_if; |
| <span class="kw">use </span>foreign_types::{ForeignType, ForeignTypeRef, Opaque}; |
| <span class="kw">use </span>libc::c_int; |
| <span class="kw">use </span>std::borrow::Borrow; |
| <span class="kw">use </span>std::convert::AsRef; |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::iter; |
| <span class="kw">use </span>std::marker::PhantomData; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::ops::{Deref, DerefMut, Index, IndexMut, Range}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::error::ErrorStack; |
| <span class="kw">use </span><span class="kw">crate</span>::util::ForeignTypeExt; |
| <span class="kw">use crate</span>::{cvt, cvt_p, LenType}; |
| |
| <span class="macro">cfg_if! </span>{ |
| <span class="kw">if </span><span class="attribute">#[cfg(ossl110)] </span>{ |
| <span class="kw">use </span>ffi::{ |
| OPENSSL_sk_pop, OPENSSL_sk_free, OPENSSL_sk_num, OPENSSL_sk_value, OPENSSL_STACK, |
| OPENSSL_sk_new_null, OPENSSL_sk_push, |
| }; |
| } <span class="kw">else </span>{ |
| <span class="kw">use </span>ffi::{ |
| sk_pop <span class="kw">as </span>OPENSSL_sk_pop, sk_free <span class="kw">as </span>OPENSSL_sk_free, sk_num <span class="kw">as </span>OPENSSL_sk_num, |
| sk_value <span class="kw">as </span>OPENSSL_sk_value, _STACK <span class="kw">as </span>OPENSSL_STACK, |
| sk_new_null <span class="kw">as </span>OPENSSL_sk_new_null, sk_push <span class="kw">as </span>OPENSSL_sk_push, |
| }; |
| } |
| } |
| |
| <span class="doccomment">/// Trait implemented by types which can be placed in a stack. |
| /// |
| /// It should not be implemented for any type outside of this crate. |
| </span><span class="kw">pub trait </span>Stackable: ForeignType { |
| <span class="doccomment">/// The C stack type for this element. |
| /// |
| /// Generally called `stack_st_{ELEMENT_TYPE}`, normally hidden by the |
| /// `STACK_OF(ELEMENT_TYPE)` macro in the OpenSSL API. |
| </span><span class="kw">type </span>StackType; |
| } |
| |
| <span class="doccomment">/// An owned stack of `T`. |
| </span><span class="kw">pub struct </span>Stack<T: Stackable>(<span class="kw-2">*mut </span>T::StackType); |
| |
| <span class="kw">unsafe impl</span><T: Stackable + Send> Send <span class="kw">for </span>Stack<T> {} |
| <span class="kw">unsafe impl</span><T: Stackable + Sync> Sync <span class="kw">for </span>Stack<T> {} |
| |
| <span class="kw">impl</span><T> fmt::Debug <span class="kw">for </span>Stack<T> |
| <span class="kw">where |
| </span>T: Stackable, |
| T::Ref: fmt::Debug, |
| { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| fmt.debug_list().entries(<span class="self">self</span>).finish() |
| } |
| } |
| <span class="kw">impl</span><T: Stackable> Drop <span class="kw">for </span>Stack<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">while </span><span class="self">self</span>.pop().is_some() {} |
| OPENSSL_sk_free(<span class="self">self</span>.<span class="number">0 </span><span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>); |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Stack<T> { |
| <span class="kw">pub fn </span>new() -> <span class="prelude-ty">Result</span><Stack<T>, ErrorStack> { |
| <span class="kw">unsafe </span>{ |
| ffi::init(); |
| <span class="kw">let </span>ptr = cvt_p(OPENSSL_sk_new_null())<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(Stack(ptr <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> iter::IntoIterator <span class="kw">for </span>Stack<T> { |
| <span class="kw">type </span>IntoIter = IntoIter<T>; |
| <span class="kw">type </span>Item = T; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> IntoIter<T> { |
| <span class="kw">let </span>it = IntoIter { |
| stack: <span class="self">self</span>.<span class="number">0</span>, |
| idxs: <span class="number">0</span>..<span class="self">self</span>.len() <span class="kw">as </span>LenType, |
| }; |
| mem::forget(<span class="self">self</span>); |
| it |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> AsRef<StackRef<T>> <span class="kw">for </span>Stack<T> { |
| <span class="kw">fn </span>as_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>StackRef<T> { |
| <span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Borrow<StackRef<T>> <span class="kw">for </span>Stack<T> { |
| <span class="kw">fn </span>borrow(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>StackRef<T> { |
| <span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: Stackable> ForeignType <span class="kw">for </span>Stack<T> { |
| <span class="kw">type </span>CType = T::StackType; |
| <span class="kw">type </span>Ref = StackRef<T>; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">unsafe fn </span>from_ptr(ptr: <span class="kw-2">*mut </span>T::StackType) -> Stack<T> { |
| <span class="macro">assert!</span>( |
| !ptr.is_null(), |
| <span class="string">"Must not instantiate a Stack from a null-ptr - use Stack::new() in \ |
| that case" |
| </span>); |
| Stack(ptr) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>as_ptr(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">*mut </span>T::StackType { |
| <span class="self">self</span>.<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Deref <span class="kw">for </span>Stack<T> { |
| <span class="kw">type </span>Target = StackRef<T>; |
| |
| <span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>StackRef<T> { |
| <span class="kw">unsafe </span>{ StackRef::from_ptr(<span class="self">self</span>.<span class="number">0</span>) } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> DerefMut <span class="kw">for </span>Stack<T> { |
| <span class="kw">fn </span>deref_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>StackRef<T> { |
| <span class="kw">unsafe </span>{ StackRef::from_ptr_mut(<span class="self">self</span>.<span class="number">0</span>) } |
| } |
| } |
| |
| <span class="kw">pub struct </span>IntoIter<T: Stackable> { |
| stack: <span class="kw-2">*mut </span>T::StackType, |
| idxs: Range<LenType>, |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Drop <span class="kw">for </span>IntoIter<T> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">unsafe </span>{ |
| <span class="comment">// https://github.com/rust-lang/rust-clippy/issues/7510 |
| </span><span class="attribute">#[allow(clippy::while_let_on_iterator)] |
| </span><span class="kw">while let </span><span class="prelude-val">Some</span>(<span class="kw">_</span>) = <span class="self">self</span>.next() {} |
| OPENSSL_sk_free(<span class="self">self</span>.stack <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>); |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Iterator <span class="kw">for </span>IntoIter<T> { |
| <span class="kw">type </span>Item = T; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next() |
| .map(|i| T::from_ptr(OPENSSL_sk_value(<span class="self">self</span>.stack <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| |
| <span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="self">self</span>.idxs.size_hint() |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> DoubleEndedIterator <span class="kw">for </span>IntoIter<T> { |
| <span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next_back() |
| .map(|i| T::from_ptr(OPENSSL_sk_value(<span class="self">self</span>.stack <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>, i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> ExactSizeIterator <span class="kw">for </span>IntoIter<T> {} |
| |
| <span class="kw">pub struct </span>StackRef<T: Stackable>(Opaque, PhantomData<T>); |
| |
| <span class="kw">unsafe impl</span><T: Stackable + Send> Send <span class="kw">for </span>StackRef<T> {} |
| <span class="kw">unsafe impl</span><T: Stackable + Sync> Sync <span class="kw">for </span>StackRef<T> {} |
| |
| <span class="kw">impl</span><T: Stackable> ForeignTypeRef <span class="kw">for </span>StackRef<T> { |
| <span class="kw">type </span>CType = T::StackType; |
| } |
| |
| <span class="kw">impl</span><T: Stackable> StackRef<T> { |
| <span class="kw">fn </span>as_stack(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">*mut </span>OPENSSL_STACK { |
| <span class="self">self</span>.as_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ |
| </span>} |
| |
| <span class="doccomment">/// Returns the number of items in the stack. |
| </span><span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">unsafe </span>{ OPENSSL_sk_num(<span class="self">self</span>.as_stack()) <span class="kw">as </span>usize } |
| } |
| |
| <span class="doccomment">/// Determines if the stack is empty. |
| </span><span class="kw">pub fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.len() == <span class="number">0 |
| </span>} |
| |
| <span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> Iter<<span class="lifetime">'_</span>, T> { |
| Iter { |
| stack: <span class="self">self</span>, |
| idxs: <span class="number">0</span>..<span class="self">self</span>.len() <span class="kw">as </span>LenType, |
| } |
| } |
| |
| <span class="kw">pub fn </span>iter_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> IterMut<<span class="lifetime">'_</span>, T> { |
| IterMut { |
| idxs: <span class="number">0</span>..<span class="self">self</span>.len() <span class="kw">as </span>LenType, |
| stack: <span class="self">self</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Returns a reference to the element at the given index in the |
| /// stack or `None` if the index is out of bounds |
| </span><span class="kw">pub fn </span>get(<span class="kw-2">&</span><span class="self">self</span>, idx: usize) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">if </span>idx >= <span class="self">self</span>.len() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="prelude-val">Some</span>(T::Ref::from_ptr(<span class="self">self</span>._get(idx))) |
| } |
| } |
| |
| <span class="doccomment">/// Returns a mutable reference to the element at the given index in the |
| /// stack or `None` if the index is out of bounds |
| </span><span class="kw">pub fn </span>get_mut(<span class="kw-2">&mut </span><span class="self">self</span>, idx: usize) -> <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">if </span>idx >= <span class="self">self</span>.len() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="prelude-val">Some</span>(T::Ref::from_ptr_mut(<span class="self">self</span>._get(idx))) |
| } |
| } |
| |
| <span class="doccomment">/// Pushes a value onto the top of the stack. |
| </span><span class="kw">pub fn </span>push(<span class="kw-2">&mut </span><span class="self">self</span>, data: T) -> <span class="prelude-ty">Result</span><(), ErrorStack> { |
| <span class="kw">unsafe </span>{ |
| cvt(OPENSSL_sk_push(<span class="self">self</span>.as_stack(), data.as_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>) <span class="kw">as </span>c_int)<span class="question-mark">?</span>; |
| mem::forget(data); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="doccomment">/// Removes the last element from the stack and returns it. |
| </span><span class="kw">pub fn </span>pop(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| <span class="kw">unsafe </span>{ |
| <span class="kw">let </span>ptr = OPENSSL_sk_pop(<span class="self">self</span>.as_stack()); |
| T::from_ptr_opt(ptr <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>) |
| } |
| } |
| |
| <span class="kw">unsafe fn </span>_get(<span class="kw-2">&</span><span class="self">self</span>, idx: usize) -> <span class="kw-2">*mut </span>T::CType { |
| OPENSSL_sk_value(<span class="self">self</span>.as_stack(), idx <span class="kw">as </span>LenType) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ |
| </span>} |
| } |
| |
| <span class="kw">impl</span><T: Stackable> Index<usize> <span class="kw">for </span>StackRef<T> { |
| <span class="kw">type </span>Output = T::Ref; |
| |
| <span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, index: usize) -> <span class="kw-2">&</span>T::Ref { |
| <span class="self">self</span>.get(index).unwrap() |
| } |
| } |
| |
| <span class="kw">impl</span><T: Stackable> IndexMut<usize> <span class="kw">for </span>StackRef<T> { |
| <span class="kw">fn </span>index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> <span class="kw-2">&mut </span>T::Ref { |
| <span class="self">self</span>.get_mut(index).unwrap() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> iter::IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>StackRef<T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>T::Ref; |
| <span class="kw">type </span>IntoIter = Iter<<span class="lifetime">'a</span>, T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> Iter<<span class="lifetime">'a</span>, T> { |
| <span class="self">self</span>.iter() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> iter::IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>StackRef<T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T::Ref; |
| <span class="kw">type </span>IntoIter = IterMut<<span class="lifetime">'a</span>, T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> IterMut<<span class="lifetime">'a</span>, T> { |
| <span class="self">self</span>.iter_mut() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> iter::IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>Stack<T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>T::Ref; |
| <span class="kw">type </span>IntoIter = Iter<<span class="lifetime">'a</span>, T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> Iter<<span class="lifetime">'a</span>, T> { |
| <span class="self">self</span>.iter() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> iter::IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Stack<T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T::Ref; |
| <span class="kw">type </span>IntoIter = IterMut<<span class="lifetime">'a</span>, T>; |
| |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> IterMut<<span class="lifetime">'a</span>, T> { |
| <span class="self">self</span>.iter_mut() |
| } |
| } |
| |
| <span class="doccomment">/// An iterator over the stack's contents. |
| </span><span class="kw">pub struct </span>Iter<<span class="lifetime">'a</span>, T: Stackable> { |
| stack: <span class="kw-2">&</span><span class="lifetime">'a </span>StackRef<T>, |
| idxs: Range<LenType>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> Iterator <span class="kw">for </span>Iter<<span class="lifetime">'a</span>, T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>T::Ref; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next() |
| .map(|i| T::Ref::from_ptr(OPENSSL_sk_value(<span class="self">self</span>.stack.as_stack(), i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| |
| <span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="self">self</span>.idxs.size_hint() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> DoubleEndedIterator <span class="kw">for </span>Iter<<span class="lifetime">'a</span>, T> { |
| <span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next_back() |
| .map(|i| T::Ref::from_ptr(OPENSSL_sk_value(<span class="self">self</span>.stack.as_stack(), i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> ExactSizeIterator <span class="kw">for </span>Iter<<span class="lifetime">'a</span>, T> {} |
| |
| <span class="doccomment">/// A mutable iterator over the stack's contents. |
| </span><span class="kw">pub struct </span>IterMut<<span class="lifetime">'a</span>, T: Stackable> { |
| stack: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>StackRef<T>, |
| idxs: Range<LenType>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> Iterator <span class="kw">for </span>IterMut<<span class="lifetime">'a</span>, T> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T::Ref; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next() |
| .map(|i| T::Ref::from_ptr_mut(OPENSSL_sk_value(<span class="self">self</span>.stack.as_stack(), i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| |
| <span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="self">self</span>.idxs.size_hint() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> DoubleEndedIterator <span class="kw">for </span>IterMut<<span class="lifetime">'a</span>, T> { |
| <span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T::Ref> { |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.idxs |
| .next_back() |
| .map(|i| T::Ref::from_ptr_mut(OPENSSL_sk_value(<span class="self">self</span>.stack.as_stack(), i) <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: Stackable> ExactSizeIterator <span class="kw">for </span>IterMut<<span class="lifetime">'a</span>, T> {} |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="openssl" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
