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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="comment">//</span>
<span class="comment">// ignore-lexer-test FIXME #15679</span>
<span class="doccomment">//! Base64 binary-to-text encoding</span>
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">FromBase64Error</span>::<span class="kw-2">*</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">CharacterSet</span>::<span class="kw-2">*</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">error</span>;
<span class="doccomment">/// Available encoding character sets</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">CharacterSet</span> {
<span class="doccomment">/// The standard character set (uses `+` and `/`)</span>
<span class="ident">Standard</span>,
<span class="doccomment">/// The URL safe character set (uses `-` and `_`)</span>
<span class="ident">UrlSafe</span>
}
<span class="doccomment">/// Available newline types</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Newline</span> {
<span class="doccomment">/// A linefeed (i.e. Unix-style newline)</span>
<span class="ident">LF</span>,
<span class="doccomment">/// A carriage return and a linefeed (i.e. Windows-style newline)</span>
<span class="ident">CRLF</span>
}
<span class="doccomment">/// Contains configuration parameters for `to_base64`.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Config</span> {
<span class="doccomment">/// Character set to use</span>
<span class="kw">pub</span> <span class="ident">char_set</span>: <span class="ident">CharacterSet</span>,
<span class="doccomment">/// Newline to use</span>
<span class="kw">pub</span> <span class="ident">newline</span>: <span class="ident">Newline</span>,
<span class="doccomment">/// True to pad output with `=` characters</span>
<span class="kw">pub</span> <span class="ident">pad</span>: <span class="ident">bool</span>,
<span class="doccomment">/// `Some(len)` to wrap lines at `len`, `None` to disable line wrapping</span>
<span class="kw">pub</span> <span class="ident">line_length</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>
}
<span class="doccomment">/// Configuration for RFC 4648 standard base64 encoding</span>
<span class="kw">pub</span> <span class="kw">static</span> <span class="ident">STANDARD</span>: <span class="ident">Config</span> <span class="op">=</span>
<span class="ident">Config</span> {<span class="ident">char_set</span>: <span class="ident">Standard</span>, <span class="ident">newline</span>: <span class="ident">Newline</span>::<span class="ident">CRLF</span>, <span class="ident">pad</span>: <span class="bool-val">true</span>, <span class="ident">line_length</span>: <span class="prelude-val">None</span>};
<span class="doccomment">/// Configuration for RFC 4648 base64url encoding</span>
<span class="kw">pub</span> <span class="kw">static</span> <span class="ident">URL_SAFE</span>: <span class="ident">Config</span> <span class="op">=</span>
<span class="ident">Config</span> {<span class="ident">char_set</span>: <span class="ident">UrlSafe</span>, <span class="ident">newline</span>: <span class="ident">Newline</span>::<span class="ident">CRLF</span>, <span class="ident">pad</span>: <span class="bool-val">false</span>, <span class="ident">line_length</span>: <span class="prelude-val">None</span>};
<span class="doccomment">/// Configuration for RFC 2045 MIME base64 encoding</span>
<span class="kw">pub</span> <span class="kw">static</span> <span class="ident">MIME</span>: <span class="ident">Config</span> <span class="op">=</span>
<span class="ident">Config</span> {<span class="ident">char_set</span>: <span class="ident">Standard</span>, <span class="ident">newline</span>: <span class="ident">Newline</span>::<span class="ident">CRLF</span>, <span class="ident">pad</span>: <span class="bool-val">true</span>, <span class="ident">line_length</span>: <span class="prelude-val">Some</span>(<span class="number">76</span>)};
<span class="kw">static</span> <span class="ident">STANDARD_CHARS</span>: <span class="kw-2">&</span><span class="lifetime">'static</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="string">b"ABCDEFGHIJKLMNOPQRSTUVWXYZ\
abcdefghijklmnopqrstuvwxyz\
0123456789+/"</span>;
<span class="kw">static</span> <span class="ident">URLSAFE_CHARS</span>: <span class="kw-2">&</span><span class="lifetime">'static</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="string">b"ABCDEFGHIJKLMNOPQRSTUVWXYZ\
abcdefghijklmnopqrstuvwxyz\
0123456789-_"</span>;
<span class="doccomment">/// A trait for converting a value to base64 encoding.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">ToBase64</span> {
<span class="doccomment">/// Converts the value of `self` to a base64 value following the specified</span>
<span class="doccomment">/// format configuration, returning the owned string.</span>
<span class="kw">fn</span> <span class="ident">to_base64</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">config</span>: <span class="ident">Config</span>) <span class="op">-></span> <span class="ident">String</span>;
}
<span class="kw">impl</span> <span class="ident">ToBase64</span> <span class="kw">for</span> [<span class="ident">u8</span>] {
<span class="doccomment">/// Turn a vector of `u8` bytes into a base64 string.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// extern crate rustc_serialize;</span>
<span class="doccomment">/// use rustc_serialize::base64::{ToBase64, STANDARD};</span>
<span class="doccomment">///</span>
<span class="doccomment">/// fn main () {</span>
<span class="doccomment">/// let str = [52,32].to_base64(STANDARD);</span>
<span class="doccomment">/// println!("base 64 output: {:?}", str);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">to_base64</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">config</span>: <span class="ident">Config</span>) <span class="op">-></span> <span class="ident">String</span> {
<span class="kw">let</span> <span class="ident">bytes</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">config</span>.<span class="ident">char_set</span> {
<span class="ident">Standard</span> <span class="op">=></span> <span class="ident">STANDARD_CHARS</span>,
<span class="ident">UrlSafe</span> <span class="op">=></span> <span class="ident">URLSAFE_CHARS</span>
};
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">newline</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">config</span>.<span class="ident">newline</span> {
<span class="ident">Newline</span>::<span class="ident">LF</span> <span class="op">=></span> <span class="string">"\n"</span>,
<span class="ident">Newline</span>::<span class="ident">CRLF</span> <span class="op">=></span> <span class="string">"\r\n"</span>,
};
<span class="comment">// Preallocate memory.</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">prealloc_len</span> <span class="op">=</span> (<span class="ident">len</span> <span class="op">+</span> <span class="number">2</span>) <span class="op">/</span> <span class="number">3</span> <span class="op">*</span> <span class="number">4</span>;
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">line_length</span>) <span class="op">=</span> <span class="ident">config</span>.<span class="ident">line_length</span> {
<span class="kw">let</span> <span class="ident">num_lines</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">prealloc_len</span> {
<span class="number">0</span> <span class="op">=></span> <span class="number">0</span>,
<span class="ident">n</span> <span class="op">=></span> (<span class="ident">n</span> <span class="op">-</span> <span class="number">1</span>) <span class="op">/</span> <span class="ident">line_length</span>
};
<span class="ident">prealloc_len</span> <span class="op">+=</span> <span class="ident">num_lines</span> <span class="op">*</span> <span class="ident">newline</span>.<span class="ident">bytes</span>().<span class="ident">count</span>();
}
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out_bytes</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">b'='</span>; <span class="ident">prealloc_len</span>];
<span class="comment">// Deal with padding bytes</span>
<span class="kw">let</span> <span class="ident">mod_len</span> <span class="op">=</span> <span class="ident">len</span> <span class="op">%</span> <span class="number">3</span>;
<span class="comment">// Use iterators to reduce branching</span>
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cur_length</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s_in</span> <span class="op">=</span> <span class="self">self</span>[..<span class="ident">len</span> <span class="op">-</span> <span class="ident">mod_len</span>].<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="kw">as</span> <span class="ident">u32</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s_out</span> <span class="op">=</span> <span class="ident">out_bytes</span>.<span class="ident">iter_mut</span>();
<span class="comment">// Convenient shorthand</span>
<span class="kw">let</span> <span class="ident">enc</span> <span class="op">=</span> <span class="op">|</span><span class="ident">val</span><span class="op">|</span> <span class="ident">bytes</span>[<span class="ident">val</span> <span class="kw">as</span> <span class="ident">usize</span>];
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">write</span> <span class="op">=</span> <span class="op">|</span><span class="ident">val</span><span class="op">|</span> <span class="kw-2">*</span><span class="ident">s_out</span>.<span class="ident">next</span>().<span class="ident">unwrap</span>() <span class="op">=</span> <span class="ident">val</span>;
<span class="comment">// Iterate though blocks of 4</span>
<span class="kw">while</span> <span class="kw">let</span> (<span class="prelude-val">Some</span>(<span class="ident">first</span>), <span class="prelude-val">Some</span>(<span class="ident">second</span>), <span class="prelude-val">Some</span>(<span class="ident">third</span>)) <span class="op">=</span>
(<span class="ident">s_in</span>.<span class="ident">next</span>(), <span class="ident">s_in</span>.<span class="ident">next</span>(), <span class="ident">s_in</span>.<span class="ident">next</span>()) {
<span class="comment">// Line break if needed</span>
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">line_length</span>) <span class="op">=</span> <span class="ident">config</span>.<span class="ident">line_length</span> {
<span class="kw">if</span> <span class="ident">cur_length</span> <span class="op">>=</span> <span class="ident">line_length</span> {
<span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> <span class="ident">newline</span>.<span class="ident">bytes</span>() { <span class="ident">write</span>(<span class="ident">b</span>) };
<span class="ident">cur_length</span> <span class="op">=</span> <span class="number">0</span>;
}
}
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> <span class="ident">first</span> <span class="op"><<</span> <span class="number">16</span> <span class="op">|</span> <span class="ident">second</span> <span class="op"><<</span> <span class="number">8</span> <span class="op">|</span> <span class="ident">third</span>;
<span class="comment">// This 24-bit number gets separated into four 6-bit numbers.</span>
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">18</span>) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">12</span>) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">6</span> ) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">0</span> ) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">cur_length</span> <span class="op">+=</span> <span class="number">4</span>;
}
<span class="comment">// Line break only needed if padding is required</span>
<span class="kw">if</span> <span class="ident">mod_len</span> <span class="op">!=</span> <span class="number">0</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">line_length</span>) <span class="op">=</span> <span class="ident">config</span>.<span class="ident">line_length</span> {
<span class="kw">if</span> <span class="ident">cur_length</span> <span class="op">>=</span> <span class="ident">line_length</span> {
<span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> <span class="ident">newline</span>.<span class="ident">bytes</span>() { <span class="ident">write</span>(<span class="ident">b</span>) };
}
}
}
<span class="comment">// Heh, would be cool if we knew this was exhaustive</span>
<span class="comment">// (the dream of bounded integer types)</span>
<span class="kw">match</span> <span class="ident">mod_len</span> {
<span class="number">0</span> <span class="op">=></span> (),
<span class="number">1</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> (<span class="self">self</span>[<span class="ident">len</span><span class="op">-</span><span class="number">1</span>] <span class="kw">as</span> <span class="ident">u32</span>) <span class="op"><<</span> <span class="number">16</span>;
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">18</span>) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">12</span>) <span class="op">&</span> <span class="number">63</span>));
}
<span class="number">2</span> <span class="op">=></span> {
<span class="kw">let</span> <span class="ident">n</span> <span class="op">=</span> (<span class="self">self</span>[<span class="ident">len</span><span class="op">-</span><span class="number">2</span>] <span class="kw">as</span> <span class="ident">u32</span>) <span class="op"><<</span> <span class="number">16</span> <span class="op">|</span>
(<span class="self">self</span>[<span class="ident">len</span><span class="op">-</span><span class="number">1</span>] <span class="kw">as</span> <span class="ident">u32</span>) <span class="op"><<</span> <span class="number">8</span>;
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">18</span>) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">12</span>) <span class="op">&</span> <span class="number">63</span>));
<span class="ident">write</span>(<span class="ident">enc</span>((<span class="ident">n</span> <span class="op">>></span> <span class="number">6</span> ) <span class="op">&</span> <span class="number">63</span>));
}
_ <span class="op">=></span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Algebra is broken, please alert the math police"</span>)
}
}
<span class="comment">// We get padding for "free", so only have to drop it if unwanted.</span>
<span class="kw">if</span> <span class="op">!</span><span class="ident">config</span>.<span class="ident">pad</span> {
<span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="string">b'='</span>) <span class="op">=</span> <span class="ident">out_bytes</span>.<span class="ident">last</span>() {
<span class="ident">out_bytes</span>.<span class="ident">pop</span>();
}
}
<span class="kw">unsafe</span> { <span class="ident">String</span>::<span class="ident">from_utf8_unchecked</span>(<span class="ident">out_bytes</span>) }
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">ToBase64</span><span class="op">></span> <span class="ident">ToBase64</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span> {
<span class="kw">fn</span> <span class="ident">to_base64</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">config</span>: <span class="ident">Config</span>) <span class="op">-></span> <span class="ident">String</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">to_base64</span>(<span class="ident">config</span>)
}
}
<span class="doccomment">/// A trait for converting from base64 encoded values.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">FromBase64</span> {
<span class="doccomment">/// Converts the value of `self`, interpreted as base64 encoded data, into</span>
<span class="doccomment">/// an owned vector of bytes, returning the vector.</span>
<span class="kw">fn</span> <span class="ident">from_base64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</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="ident">FromBase64Error</span><span class="op">></span>;
}
<span class="doccomment">/// Errors that can occur when decoding a base64 encoded string</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">FromBase64Error</span> {
<span class="doccomment">/// The input contained a character not part of the base64 format</span>
<span class="ident">InvalidBase64Byte</span>(<span class="ident">u8</span>, <span class="ident">usize</span>),
<span class="doccomment">/// The input had an invalid length</span>
<span class="ident">InvalidBase64Length</span>,
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">FromBase64Error</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">InvalidBase64Byte</span>(<span class="ident">ch</span>, <span class="ident">idx</span>) <span class="op">=></span>
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Invalid character '{}' at position {}"</span>, <span class="ident">ch</span>, <span class="ident">idx</span>),
<span class="ident">InvalidBase64Length</span> <span class="op">=></span> <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Invalid length"</span>),
}
}
}
<span class="kw">impl</span> <span class="ident">error</span>::<span class="ident">Error</span> <span class="kw">for</span> <span class="ident">FromBase64Error</span> {
<span class="kw">fn</span> <span class="ident">description</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">str</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="self">self</span> {
<span class="ident">InvalidBase64Byte</span>(_, _) <span class="op">=></span> <span class="string">"invalid character"</span>,
<span class="ident">InvalidBase64Length</span> <span class="op">=></span> <span class="string">"invalid length"</span>,
}
}
}
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">FromBase64Error</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">fmt</span>::<span class="ident">Debug</span>::<span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>)
}
}
<span class="kw">impl</span> <span class="ident">FromBase64</span> <span class="kw">for</span> <span class="ident">str</span> {
<span class="doccomment">/// Convert any base64 encoded string (literal, `@`, `&`, or `~`)</span>
<span class="doccomment">/// to the byte values it encodes.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// You can use the `String::from_utf8` function to turn a `Vec<u8>` into a</span>
<span class="doccomment">/// string with characters corresponding to those values.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This converts a string literal to base64 and back.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// extern crate rustc_serialize;</span>
<span class="doccomment">/// use rustc_serialize::base64::{ToBase64, FromBase64, STANDARD};</span>
<span class="doccomment">///</span>
<span class="doccomment">/// fn main () {</span>
<span class="doccomment">/// let hello_str = b"Hello, World".to_base64(STANDARD);</span>
<span class="doccomment">/// println!("base64 output: {}", hello_str);</span>
<span class="doccomment">/// let res = hello_str.from_base64();</span>
<span class="doccomment">/// if res.is_ok() {</span>
<span class="doccomment">/// let opt_bytes = String::from_utf8(res.unwrap());</span>
<span class="doccomment">/// if opt_bytes.is_ok() {</span>
<span class="doccomment">/// println!("decoded from base64: {:?}", opt_bytes.unwrap());</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">from_base64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</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="ident">FromBase64Error</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">as_bytes</span>().<span class="ident">from_base64</span>()
}
}
<span class="kw">impl</span> <span class="ident">FromBase64</span> <span class="kw">for</span> [<span class="ident">u8</span>] {
<span class="kw">fn</span> <span class="ident">from_base64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</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="ident">FromBase64Error</span><span class="op">></span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">with_capacity</span>(<span class="self">self</span>.<span class="ident">len</span>());
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">modulus</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">it</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>();
<span class="kw">for</span> <span class="ident">byte</span> <span class="kw">in</span> <span class="ident">it</span>.<span class="ident">by_ref</span>() {
<span class="kw">let</span> <span class="ident">code</span> <span class="op">=</span> <span class="ident">DECODE_TABLE</span>[<span class="kw-2">*</span><span class="ident">byte</span> <span class="kw">as</span> <span class="ident">usize</span>];
<span class="kw">if</span> <span class="ident">code</span> <span class="op">>=</span> <span class="ident">SPECIAL_CODES_START</span> {
<span class="kw">match</span> <span class="ident">code</span> {
<span class="ident">NEWLINE_CODE</span> <span class="op">=></span> <span class="kw">continue</span>,
<span class="ident">EQUALS_CODE</span> <span class="op">=></span> <span class="kw">break</span>,
<span class="ident">INVALID_CODE</span> <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">InvalidBase64Byte</span>(
<span class="kw-2">*</span><span class="ident">byte</span>, (<span class="ident">byte</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="ident">usize</span>) <span class="op">-</span> <span class="self">self</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="ident">usize</span>)),
_ <span class="op">=></span> <span class="macro">unreachable</span><span class="macro">!</span>(),
}
}
<span class="ident">buf</span> <span class="op">=</span> (<span class="ident">buf</span> <span class="op">|</span> <span class="ident">code</span> <span class="kw">as</span> <span class="ident">u32</span>) <span class="op"><<</span> <span class="number">6</span>;
<span class="ident">modulus</span> <span class="op">+=</span> <span class="number">1</span>;
<span class="kw">if</span> <span class="ident">modulus</span> <span class="op">==</span> <span class="number">4</span> {
<span class="ident">modulus</span> <span class="op">=</span> <span class="number">0</span>;
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">22</span>) <span class="kw">as</span> <span class="ident">u8</span>);
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">14</span>) <span class="kw">as</span> <span class="ident">u8</span>);
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">6</span> ) <span class="kw">as</span> <span class="ident">u8</span>);
}
}
<span class="kw">for</span> <span class="ident">byte</span> <span class="kw">in</span> <span class="ident">it</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">byte</span> {
<span class="string">b'='</span> <span class="op">|</span> <span class="string">b'\r'</span> <span class="op">|</span> <span class="string">b'\n'</span> <span class="op">=></span> <span class="kw">continue</span>,
_ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">InvalidBase64Byte</span>(
<span class="kw-2">*</span><span class="ident">byte</span>, (<span class="ident">byte</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> _ <span class="kw">as</span> <span class="ident">usize</span>) <span class="op">-</span> <span class="self">self</span>.<span class="ident">as_ptr</span>() <span class="kw">as</span> <span class="ident">usize</span>)),
}
}
<span class="kw">match</span> <span class="ident">modulus</span> {
<span class="number">2</span> <span class="op">=></span> {
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">10</span>) <span class="kw">as</span> <span class="ident">u8</span>);
}
<span class="number">3</span> <span class="op">=></span> {
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">16</span>) <span class="kw">as</span> <span class="ident">u8</span>);
<span class="ident">r</span>.<span class="ident">push</span>((<span class="ident">buf</span> <span class="op">>></span> <span class="number">8</span> ) <span class="kw">as</span> <span class="ident">u8</span>);
}
<span class="number">0</span> <span class="op">=></span> (),
_ <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">InvalidBase64Length</span>),
}
<span class="prelude-val">Ok</span>(<span class="ident">r</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">FromBase64</span><span class="op">></span> <span class="ident">FromBase64</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">T</span> {
<span class="kw">fn</span> <span class="ident">from_base64</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</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="ident">FromBase64Error</span><span class="op">></span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">from_base64</span>()
}
}
<span class="doccomment">/// Base64 decoding lookup table, generated using:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// let mut ch = 0u8;</span>
<span class="doccomment">/// for ch in 0..255 {</span>
<span class="doccomment">/// let mut ch = ch as u8;</span>
<span class="doccomment">/// let code = match ch {</span>
<span class="doccomment">/// b'A'...b'Z' => ch - 0x41,</span>
<span class="doccomment">/// b'a'...b'z' => ch - 0x47,</span>
<span class="doccomment">/// b'0'...b'9' => ch + 0x04,</span>
<span class="doccomment">/// b'+' | b'-' => 0x3E,</span>
<span class="doccomment">/// b'/' | b'_' => 0x3F,</span>
<span class="doccomment">/// b'=' => 0xFE,</span>
<span class="doccomment">/// b'\r' | b'\n' => 0xFD,</span>
<span class="doccomment">/// _ => 0xFF,</span>
<span class="doccomment">/// };</span>
<span class="doccomment">/// print!("0x{:02X}, ", code);</span>
<span class="doccomment">/// if ch % 16 == 15 { println!(""); }</span>
<span class="doccomment">/// else if ch == 0xFF { break; }</span>
<span class="doccomment">/// ch += 1;</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// println!("");</span>
<span class="doccomment">/// ```</span>
<span class="kw">const</span> <span class="ident">DECODE_TABLE</span>: [<span class="ident">u8</span>; <span class="number">256</span>] <span class="op">=</span> [
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFD</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFD</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0x3E</span>, <span class="number">0xFF</span>, <span class="number">0x3E</span>, <span class="number">0xFF</span>, <span class="number">0x3F</span>,
<span class="number">0x34</span>, <span class="number">0x35</span>, <span class="number">0x36</span>, <span class="number">0x37</span>, <span class="number">0x38</span>, <span class="number">0x39</span>, <span class="number">0x3A</span>, <span class="number">0x3B</span>, <span class="number">0x3C</span>, <span class="number">0x3D</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFE</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0x00</span>, <span class="number">0x01</span>, <span class="number">0x02</span>, <span class="number">0x03</span>, <span class="number">0x04</span>, <span class="number">0x05</span>, <span class="number">0x06</span>, <span class="number">0x07</span>, <span class="number">0x08</span>, <span class="number">0x09</span>, <span class="number">0x0A</span>, <span class="number">0x0B</span>, <span class="number">0x0C</span>, <span class="number">0x0D</span>, <span class="number">0x0E</span>,
<span class="number">0x0F</span>, <span class="number">0x10</span>, <span class="number">0x11</span>, <span class="number">0x12</span>, <span class="number">0x13</span>, <span class="number">0x14</span>, <span class="number">0x15</span>, <span class="number">0x16</span>, <span class="number">0x17</span>, <span class="number">0x18</span>, <span class="number">0x19</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0x3F</span>,
<span class="number">0xFF</span>, <span class="number">0x1A</span>, <span class="number">0x1B</span>, <span class="number">0x1C</span>, <span class="number">0x1D</span>, <span class="number">0x1E</span>, <span class="number">0x1F</span>, <span class="number">0x20</span>, <span class="number">0x21</span>, <span class="number">0x22</span>, <span class="number">0x23</span>, <span class="number">0x24</span>, <span class="number">0x25</span>, <span class="number">0x26</span>, <span class="number">0x27</span>, <span class="number">0x28</span>,
<span class="number">0x29</span>, <span class="number">0x2A</span>, <span class="number">0x2B</span>, <span class="number">0x2C</span>, <span class="number">0x2D</span>, <span class="number">0x2E</span>, <span class="number">0x2F</span>, <span class="number">0x30</span>, <span class="number">0x31</span>, <span class="number">0x32</span>, <span class="number">0x33</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
<span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>, <span class="number">0xFF</span>,
];
<span class="kw">const</span> <span class="ident">INVALID_CODE</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0xFF</span>;
<span class="kw">const</span> <span class="ident">EQUALS_CODE</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0xFE</span>;
<span class="kw">const</span> <span class="ident">NEWLINE_CODE</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">0xFD</span>;
<span class="kw">const</span> <span class="ident">SPECIAL_CODES_START</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="ident">NEWLINE_CODE</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
<span class="kw">use</span> <span class="ident">base64</span>::{<span class="ident">Config</span>, <span class="ident">Newline</span>, <span class="ident">FromBase64</span>, <span class="ident">ToBase64</span>, <span class="ident">STANDARD</span>, <span class="ident">URL_SAFE</span>};
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_basic</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">""</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">""</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"f"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zg=="</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"fo"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zm8="</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"foo"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zm9v"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"foob"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zm9vYg=="</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"fooba"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zm9vYmE="</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"foobar"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"Zm9vYmFy"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_crlf_line_break</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span>[<span class="number">0</span>; <span class="number">1000</span>].<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">line_length</span>: <span class="prelude-val">None</span>, ..<span class="ident">STANDARD</span>})
.<span class="ident">contains</span>(<span class="string">"\r\n"</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"foobar"</span>.<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">line_length</span>: <span class="prelude-val">Some</span>(<span class="number">4</span>),
..<span class="ident">STANDARD</span>}),
<span class="string">"Zm9v\r\nYmFy"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_lf_line_break</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span>[<span class="number">0</span>; <span class="number">1000</span>].<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">line_length</span>: <span class="prelude-val">None</span>,
<span class="ident">newline</span>: <span class="ident">Newline</span>::<span class="ident">LF</span>,
..<span class="ident">STANDARD</span>})
.<span class="ident">contains</span>(<span class="string">"\n"</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"foobar"</span>.<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">line_length</span>: <span class="prelude-val">Some</span>(<span class="number">4</span>),
<span class="ident">newline</span>: <span class="ident">Newline</span>::<span class="ident">LF</span>,
..<span class="ident">STANDARD</span>}),
<span class="string">"Zm9v\nYmFy"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_padding</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"f"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">pad</span>: <span class="bool-val">false</span>, ..<span class="ident">STANDARD</span>}), <span class="string">"Zg"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"fo"</span>.<span class="ident">as_bytes</span>().<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">pad</span>: <span class="bool-val">false</span>, ..<span class="ident">STANDARD</span>}), <span class="string">"Zm8"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_url_safe</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>([<span class="number">251</span>, <span class="number">255</span>].<span class="ident">to_base64</span>(<span class="ident">URL_SAFE</span>), <span class="string">"-_8"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>([<span class="number">251</span>, <span class="number">255</span>].<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>), <span class="string">"+/8="</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_to_base64_empty_line_length</span>() {
[].<span class="ident">to_base64</span>(<span class="ident">Config</span> {<span class="ident">line_length</span>: <span class="prelude-val">Some</span>(<span class="number">72</span>), ..<span class="ident">STANDARD</span>});
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_basic</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">""</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b""</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zg=="</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"f"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm8="</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"fo"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9v"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"foo"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9vYg=="</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"foob"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9vYmE="</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"fooba"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9vYmFy"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"foobar"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_bytes</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">b"Zm9vYmFy"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">b"foobar"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_newlines</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9v\r\nYmFy"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(),
<span class="string">b"foobar"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9vYg==\r\n"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(),
<span class="string">b"foob"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9v\nYmFy"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(),
<span class="string">b"foobar"</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"Zm9vYg==\n"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(),
<span class="string">b"foob"</span>);
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_urlsafe</span>() {
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="string">"-_8"</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>(), <span class="string">"+/8="</span>.<span class="ident">from_base64</span>().<span class="ident">unwrap</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_invalid_char</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">"Zm$="</span>.<span class="ident">from_base64</span>().<span class="ident">is_err</span>());
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">"Zg==$"</span>.<span class="ident">from_base64</span>().<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_from_base64_invalid_padding</span>() {
<span class="macro">assert</span><span class="macro">!</span>(<span class="string">"Z==="</span>.<span class="ident">from_base64</span>().<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="kw">fn</span> <span class="ident">test_base64_random</span>() {
<span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">thread_rng</span>, <span class="ident">Rng</span>};
<span class="kw">for</span> _ <span class="kw">in</span> <span class="number">0</span>..<span class="number">1000</span> {
<span class="kw">let</span> <span class="ident">times</span> <span class="op">=</span> <span class="ident">thread_rng</span>().<span class="ident">gen_range</span>(<span class="number">1</span>, <span class="number">100</span>);
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">thread_rng</span>().<span class="ident">gen_iter</span>::<span class="op"><</span><span class="ident">u8</span><span class="op">></span>().<span class="ident">take</span>(<span class="ident">times</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="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>.<span class="ident">to_base64</span>(<span class="ident">STANDARD</span>)
.<span class="ident">from_base64</span>()
.<span class="ident">unwrap</span>(),
<span class="ident">v</span>);
}
}
}
</pre>
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