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</pre><pre class="rust ">
<span class="comment">// Copyright 2012-2015 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">//! Global initialization and retreival of command line arguments.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! On some platforms these are stored during runtime startup,</span>
<span class="doccomment">//! and on some they are retrieved from the system on demand.</span>
<span class="attribute">#<span class="op">!</span>[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span> <span class="comment">// runtime init functions not used during testing</span>
<span class="kw">use</span> <span class="ident">ffi</span>::<span class="ident">OsString</span>;
<span class="kw">use</span> <span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">use</span> <span class="ident">vec</span>;
<span class="doccomment">/// One-time global initialization.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">init</span>(<span class="ident">argc</span>: <span class="ident">isize</span>, <span class="ident">argv</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">u8</span>) { <span class="ident">imp</span>::<span class="ident">init</span>(<span class="ident">argc</span>, <span class="ident">argv</span>) }
<span class="doccomment">/// One-time global cleanup.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">cleanup</span>() { <span class="ident">imp</span>::<span class="ident">cleanup</span>() }
<span class="doccomment">/// Returns the command line arguments</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>() <span class="op">-></span> <span class="ident">Args</span> {
<span class="ident">imp</span>::<span class="ident">args</span>()
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Args</span> {
<span class="ident">iter</span>: <span class="ident">vec</span>::<span class="ident">IntoIter</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span>,
<span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> ()<span class="op">></span>,
}
<span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">OsString</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>() }
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>() }
}
<span class="kw">impl</span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>() }
}
<span class="kw">impl</span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Args</span> {
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>() }
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"android"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"freebsd"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"dragonfly"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"bitrig"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"netbsd"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"openbsd"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"solaris"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"emscripten"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"haiku"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"fuchsia"</span>))]</span>
<span class="kw">mod</span> <span class="ident">imp</span> {
<span class="kw">use</span> <span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">mem</span>;
<span class="kw">use</span> <span class="ident">ffi</span>::{<span class="ident">CStr</span>, <span class="ident">OsString</span>};
<span class="kw">use</span> <span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">use</span> <span class="ident">libc</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Args</span>;
<span class="kw">use</span> <span class="ident">sys_common</span>::<span class="ident">mutex</span>::<span class="ident">Mutex</span>;
<span class="kw">static</span> <span class="kw-2">mut</span> <span class="ident">GLOBAL_ARGS_PTR</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">static</span> <span class="ident">LOCK</span>: <span class="ident">Mutex</span> <span class="op">=</span> <span class="ident">Mutex</span>::<span class="ident">new</span>();
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">init</span>(<span class="ident">argc</span>: <span class="ident">isize</span>, <span class="ident">argv</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">u8</span>) {
<span class="kw">let</span> <span class="ident">args</span> <span class="op">=</span> (<span class="number">0</span>..<span class="ident">argc</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> {
<span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="kw-2">*</span><span class="ident">argv</span>.<span class="ident">offset</span>(<span class="ident">i</span>) <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>).<span class="ident">to_bytes</span>().<span class="ident">to_vec</span>()
}).<span class="ident">collect</span>();
<span class="ident">LOCK</span>.<span class="ident">lock</span>();
<span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">get_global_ptr</span>();
<span class="macro">assert</span><span class="macro">!</span>((<span class="kw-2">*</span><span class="ident">ptr</span>).<span class="ident">is_none</span>());
(<span class="kw-2">*</span><span class="ident">ptr</span>) <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="kw">box</span> <span class="ident">args</span>);
<span class="ident">LOCK</span>.<span class="ident">unlock</span>();
}
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">cleanup</span>() {
<span class="ident">LOCK</span>.<span class="ident">lock</span>();
<span class="kw-2">*</span><span class="ident">get_global_ptr</span>() <span class="op">=</span> <span class="prelude-val">None</span>;
<span class="ident">LOCK</span>.<span class="ident">unlock</span>();
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>() <span class="op">-></span> <span class="ident">Args</span> {
<span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">clone</span>().<span class="ident">unwrap_or</span>(<span class="ident">Vec</span>::<span class="ident">new</span>());
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">OsString</span><span class="op">></span> <span class="op">=</span> <span class="ident">bytes</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> {
<span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">v</span>)
}).<span class="ident">collect</span>();
<span class="ident">Args</span> { <span class="ident">iter</span>: <span class="ident">v</span>.<span class="ident">into_iter</span>(), <span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span> }
}
<span class="kw">fn</span> <span class="ident">clone</span>() <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">>></span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="ident">LOCK</span>.<span class="ident">lock</span>();
<span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="ident">get_global_ptr</span>();
<span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> (<span class="kw-2">*</span><span class="ident">ptr</span>).<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> (<span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">s</span>).<span class="ident">clone</span>());
<span class="ident">LOCK</span>.<span class="ident">unlock</span>();
<span class="kw">return</span> <span class="ident">ret</span>
}
}
<span class="kw">fn</span> <span class="ident">get_global_ptr</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Box</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">>></span><span class="op">>></span> {
<span class="kw">unsafe</span> { <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="kw-2">&</span><span class="ident">GLOBAL_ARGS_PTR</span>) }
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>,
<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>))]</span>
<span class="kw">mod</span> <span class="ident">imp</span> {
<span class="kw">use</span> <span class="ident">ffi</span>::<span class="ident">CStr</span>;
<span class="kw">use</span> <span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">use</span> <span class="ident">libc</span>;
<span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Args</span>;
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">init</span>(<span class="ident">_argc</span>: <span class="ident">isize</span>, <span class="ident">_argv</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">u8</span>) {
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">cleanup</span>() {
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"macos"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>() <span class="op">-></span> <span class="ident">Args</span> {
<span class="kw">use</span> <span class="ident">os</span>::<span class="ident">unix</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
<span class="kw">extern</span> {
<span class="comment">// These functions are in crt_externs.h.</span>
<span class="kw">fn</span> <span class="ident">_NSGetArgc</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_int</span>;
<span class="kw">fn</span> <span class="ident">_NSGetArgv</span>() <span class="op">-></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_char</span>;
}
<span class="kw">let</span> <span class="ident">vec</span> <span class="op">=</span> <span class="kw">unsafe</span> {
<span class="kw">let</span> (<span class="ident">argc</span>, <span class="ident">argv</span>) <span class="op">=</span> (<span class="kw-2">*</span><span class="ident">_NSGetArgc</span>() <span class="kw">as</span> <span class="ident">isize</span>,
<span class="kw-2">*</span><span class="ident">_NSGetArgv</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>);
(<span class="number">0</span>.. <span class="ident">argc</span> <span class="kw">as</span> <span class="ident">isize</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> {
<span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="kw-2">*</span><span class="ident">argv</span>.<span class="ident">offset</span>(<span class="ident">i</span>)).<span class="ident">to_bytes</span>().<span class="ident">to_vec</span>();
<span class="ident">OsStringExt</span>::<span class="ident">from_vec</span>(<span class="ident">bytes</span>)
}).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span>_<span class="op">>></span>()
};
<span class="ident">Args</span> {
<span class="ident">iter</span>: <span class="ident">vec</span>.<span class="ident">into_iter</span>(),
<span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span>,
}
}
<span class="comment">// As _NSGetArgc and _NSGetArgv aren't mentioned in iOS docs</span>
<span class="comment">// and use underscores in their names - they're most probably</span>
<span class="comment">// are considered private and therefore should be avoided</span>
<span class="comment">// Here is another way to get arguments using Objective C</span>
<span class="comment">// runtime</span>
<span class="comment">//</span>
<span class="comment">// In general it looks like:</span>
<span class="comment">// res = Vec::new()</span>
<span class="comment">// let args = [[NSProcessInfo processInfo] arguments]</span>
<span class="comment">// for i in (0..[args count])</span>
<span class="comment">// res.push([args objectAtIndex:i])</span>
<span class="comment">// res</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"ios"</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">args</span>() <span class="op">-></span> <span class="ident">Args</span> {
<span class="kw">use</span> <span class="ident">ffi</span>::<span class="ident">OsString</span>;
<span class="kw">use</span> <span class="ident">mem</span>;
<span class="kw">use</span> <span class="ident">str</span>;
<span class="kw">extern</span> {
<span class="kw">fn</span> <span class="ident">sel_registerName</span>(<span class="ident">name</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_uchar</span>) <span class="op">-></span> <span class="ident">Sel</span>;
<span class="kw">fn</span> <span class="ident">objc_getClass</span>(<span class="ident">class_name</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_uchar</span>) <span class="op">-></span> <span class="ident">NsId</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span><span class="op">=</span><span class="string">"aarch64"</span>)]</span>
<span class="kw">extern</span> {
<span class="kw">fn</span> <span class="ident">objc_msgSend</span>(<span class="ident">obj</span>: <span class="ident">NsId</span>, <span class="ident">sel</span>: <span class="ident">Sel</span>) <span class="op">-></span> <span class="ident">NsId</span>;
<span class="attribute">#[<span class="ident">link_name</span><span class="op">=</span><span class="string">"objc_msgSend"</span>]</span>
<span class="kw">fn</span> <span class="ident">objc_msgSend_ul</span>(<span class="ident">obj</span>: <span class="ident">NsId</span>, <span class="ident">sel</span>: <span class="ident">Sel</span>, <span class="ident">i</span>: <span class="ident">libc</span>::<span class="ident">c_ulong</span>) <span class="op">-></span> <span class="ident">NsId</span>;
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span><span class="op">=</span><span class="string">"aarch64"</span>))]</span>
<span class="kw">extern</span> {
<span class="kw">fn</span> <span class="ident">objc_msgSend</span>(<span class="ident">obj</span>: <span class="ident">NsId</span>, <span class="ident">sel</span>: <span class="ident">Sel</span>, ...) <span class="op">-></span> <span class="ident">NsId</span>;
<span class="attribute">#[<span class="ident">link_name</span><span class="op">=</span><span class="string">"objc_msgSend"</span>]</span>
<span class="kw">fn</span> <span class="ident">objc_msgSend_ul</span>(<span class="ident">obj</span>: <span class="ident">NsId</span>, <span class="ident">sel</span>: <span class="ident">Sel</span>, ...) <span class="op">-></span> <span class="ident">NsId</span>;
}
<span class="kw">type</span> <span class="ident">Sel</span> <span class="op">=</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_void</span>;
<span class="kw">type</span> <span class="ident">NsId</span> <span class="op">=</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_void</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">res</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">process_info_sel</span> <span class="op">=</span> <span class="ident">sel_registerName</span>(<span class="string">"processInfo\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">arguments_sel</span> <span class="op">=</span> <span class="ident">sel_registerName</span>(<span class="string">"arguments\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">utf8_sel</span> <span class="op">=</span> <span class="ident">sel_registerName</span>(<span class="string">"UTF8String\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">count_sel</span> <span class="op">=</span> <span class="ident">sel_registerName</span>(<span class="string">"count\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">object_at_sel</span> <span class="op">=</span> <span class="ident">sel_registerName</span>(<span class="string">"objectAtIndex:\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">klass</span> <span class="op">=</span> <span class="ident">objc_getClass</span>(<span class="string">"NSProcessInfo\0"</span>.<span class="ident">as_ptr</span>());
<span class="kw">let</span> <span class="ident">info</span> <span class="op">=</span> <span class="ident">objc_msgSend</span>(<span class="ident">klass</span>, <span class="ident">process_info_sel</span>);
<span class="kw">let</span> <span class="ident">args</span> <span class="op">=</span> <span class="ident">objc_msgSend</span>(<span class="ident">info</span>, <span class="ident">arguments_sel</span>);
<span class="kw">let</span> <span class="ident">cnt</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">objc_msgSend</span>(<span class="ident">args</span>, <span class="ident">count_sel</span>));
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">cnt</span> {
<span class="kw">let</span> <span class="ident">tmp</span> <span class="op">=</span> <span class="ident">objc_msgSend_ul</span>(<span class="ident">args</span>, <span class="ident">object_at_sel</span>, <span class="ident">i</span> <span class="kw">as</span> <span class="ident">libc</span>::<span class="ident">c_ulong</span>);
<span class="kw">let</span> <span class="ident">utf_c_str</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span> <span class="op">=</span>
<span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">objc_msgSend</span>(<span class="ident">tmp</span>, <span class="ident">utf8_sel</span>));
<span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">utf_c_str</span>).<span class="ident">to_bytes</span>();
<span class="ident">res</span>.<span class="ident">push</span>(<span class="ident">OsString</span>::<span class="ident">from</span>(<span class="ident">str</span>::<span class="ident">from_utf8</span>(<span class="ident">bytes</span>).<span class="ident">unwrap</span>()))
}
}
<span class="ident">Args</span> { <span class="ident">iter</span>: <span class="ident">res</span>.<span class="ident">into_iter</span>(), <span class="ident">_dont_send_or_sync_me</span>: <span class="ident">PhantomData</span> }
}
}
</pre>
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