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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'>/// ```rust</span>
<span class='doccomment'>/// let mut ch = 0u8;</span>
<span class='doccomment'>/// loop {</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='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'>08</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'>08</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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