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encode-base64.html
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<!DOCTYPE html>
<html lang="en">
<head>
<!--__GOLF_REDIRECT__-->
<title>Encode base64</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<meta name="HandheldFriendly" content="True"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<link rel="canonical" href="https://golf-lang.com/encode-base64.html" />
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<script>
function gg_copy(gt, eid, gc) {
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<!--GOLFMENU13-->
<!--GOLFENDMENU13-->
<!--BEGVDOC90-->
<div class='vhub' style='margin-top:10px;margin-right:20px;text-align:left;background-color:white;'><a href='https://golf-lang.com' style='border-bottom:0px'><img src='https://golf-lang.com/golf.png'/></a></div><div class='vhub' style='margin-top:10px;'> Encode base64</div><hr/><span style="font-weight:bold;">Purpose</span>: Base64 encode.<br/>
<br/>
<div class='code' style='position:relative;padding-right:16px;'>
<pre id='code_437'>
<span class="Statement"> encode-base64</span> <data><span class="Type"> to</span> <output data> \
[<span class="Identifier"> input-length</span> <input length> ]</pre>
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</div><br/>
encode-base64 will encode string <data> into base64 string <output data>.<br/>
<br/>
If "input-length" clause is used, then <input length> is the number of bytes encoded, otherwise the entirety of <data> is encoded. <br/>
<br/>
The result is stored in <output data> (in "to" clause).<br/>
<br/>
Base64-encoded strings are often used where binary data needs to be in a format that complies with certain text-based protocols, such as in attaching documents in email, or embedding binary documents (such as "JPG" images for example) in web pages with "data:image/jpg;base64..." specified, etc.<br/>
<div class="vsub"><a id="Examples"></a>Examples</div>
An example that encodes a string, decodes, and finally checks if they match:<br/>
<div class='code' style='position:relative;padding-right:16px;'>
<pre id='code_438'>
<span class="Comment">// Original string, generally this would be binary data in most cases</span>
<span class="Statement"> set-string</span> dt =<span class="Constant">" oh well "</span>
<span class="Comment">// Encode in base64</span>
<span class="Statement"> encode-base64</span> dt<span class="Type"> to</span> out_dt
<span class="Statement"> decode-base64</span> out_dt<span class="Type"> to</span> new_dt
<span class="Statement"> if-true</span> dt<span class="Identifier"> equal</span> new_dt
<span class="Statement"> @</span>Success!
<span class="Statement"> else-if</span>
<span class="Statement"> @</span>Failure!
<span class="Statement"> end-if</span></pre>
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</div><br/>
In the next example, "input-length" clause is used, and only a partial of the input string is encoded, then later compared to the original:<br/>
<div class='code' style='position:relative;padding-right:16px;'>
<pre id='code_439'>
<span class="Comment">// Original string, generally this would be binary data in most cases</span>
<span class="Statement"> set-string</span> dt =<span class="Constant">" oh well "</span>
<span class="Comment">// Encode in base64, encode only </span><span class="Constant">6</span><span class="Comment"> bytes</span>
<span class="Statement"> encode-base64</span> dt<span class="Identifier"> input-length</span> <span class="Constant">6</span><span class="Type"> to</span> out_dt
<span class="Statement"> decode-base64</span> out_dt<span class="Type"> to</span> new_dt
<span class="Comment">// Get length of decoded string</span>
<span class="Statement"> string-length</span> new_dt<span class="Type"> to</span> new_len
<span class="Statement"> if-true</span> new_len<span class="Identifier"> not-equal</span> <span class="Constant">6</span>
<span class="Statement"> @</span>Failure!
<span class="Statement"> else-if</span>
<span class="Statement"> @</span>Success!
<span class="Statement"> end-if</span>
<span class="Statement"> if-true</span> dt<span class="Identifier"> equal</span> new_dt<span class="Identifier"> length</span> new_len
<span class="Statement"> @</span>Success!
<span class="Statement"> else-if</span>
<span class="Statement"> @</span>Failure! [<span class="Statement"><<p-out</span> dt<span class="Statement">>></span>] [<span class="Statement"><<p-out</span> new_dt<span class="Statement">>></span>]
<span class="Statement"> end-if</span></pre>
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</div><br/>
<div class="vsub"><a id="See also"></a>See also</div>
<a name='Base64'></a><span style="font-weight:bold;">Base64</span><br/>
<a href='https://golf-lang.com/decode-base64.html'>decode-base64</a> <br/>
<a href='https://golf-lang.com/encode-base64.html'>encode-base64</a> <br/>
<span style="font-weight:bold;">See all</span> <br/>
<a href='https://golf-lang.com/documentation.html'>documentation</a><br/>
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