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update @ Thu 20 Jan 16:59:33 EET 2022

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Signed-off-by: Ari Archer <truncateddinosour@gmail.com>
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Ari Archer 2022-01-20 16:59:33 +02:00
parent d8604ac3d5
commit e07bc9774b
4 changed files with 129 additions and 5 deletions
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116
page/blog/blogs/Fast-atoi-in-c(++)_8279372928.html Normal file
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@ -0,0 +1,116 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta content="IE=edge" http-equiv="X-UA-Compatible"/>
<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
<title>
Ari::web -&gt; Blog
</title>
<meta content="website webdev linux programming ari terminal dark blog javascript opensource free" name="keywords"/>
<meta content="Blog on 2022-01-20 16:58:31 EET - Fast atoi in C(++)" name="description"/>
<meta content="follow" name="robots"/>
</head>
<body>
<div>
<h1>
Fast atoi in C(++)
</h1>
<p>
2022-01-20 16:58:31 EET |
<a href="..">
back
</a>
|
<a href="/">
home
</a>
|
<a href="/git">
git
</a>
</p>
<hr/>
<p>
<code>
std::atoi
</code>
(in C++) is fast on its own but can be slow
so for stuff you need speed you can use this:
</p>
<ul>
<li>
Option one
</li>
</ul>
<p>
```
int fast_atoi(const char *int_string) {
int value = 0;
</p>
<pre><code>while (*int_string &amp;&amp; *int_string &gt;= '0' &amp;&amp; *int_string &lt;= '9')
value = value * 10 + (*int_string++ - '0');
return value;
</code></pre>
<p>
}
```
</p>
<p>
This requires no headers, just pure C (also valid in C++),
you can put this into your code and it will just work!
</p>
<ul>
<li>
Option two
</li>
</ul>
<p>
```
</p>
<h1>
include
<assert.h>
</assert.h>
</h1>
<p>
int fast_atoi(char *int_string) {
int value = 0;
</p>
<pre><code>while (*int_string) {
if (!(*int_string &gt;= '0' &amp;&amp; *int_string &lt;= '9'))
assert(0 &amp;&amp; "atoi(): invalid int_string");
value = value * 10 + (*int_string++ - '0');
}
return value;
</code></pre>
<p>
}
```
</p>
<p>
This option is throws an assertion error if it encounters an
invalid string but this requires
<code>
assert.h
</code>
as a dependency.
</p>
<p>
In C++
<code>
assert.h
</code>
should be replaced with
<code>
cassert
</code>
.
</p>
</div>
</body>
</html>
<!-- this is automatically generated by scripts/add_blog -->

7
page/blog/index.html
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@ -16,7 +16,7 @@
My blogs
</h1>
<code>
Last updated on: 2022-01-20 16:11:48 EET
Last updated on: 2022-01-20 16:58:31 EET
</code>
<div>
<ul>
@ -135,6 +135,11 @@
Fixing kernel freezing on realtek WiFi
</a>
</li>
<li>
<a href="/page/blog/blogs/Fast-atoi-in-c(++)_8279372928.html">
Fast atoi in C(++)
</a>
</li>
</ul>
</div>
</body>

1
page/blog/index.md
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@ -21,3 +21,4 @@
* [New domain! -- ari-web.xyz](/page/blog/blogs/New-domain!----ari-web.xyz_7375640347.html)
* [Funny thing about my site](/page/blog/blogs/Funny-thing-about-my-site_6342443591.html)
* [Fixing kernel freezing on realtek WiFi](/page/blog/blogs/Fixing-kernel-freezing-on-realtek-wifi_5342268108.html)
* [Fast atoi in C(++)](/page/blog/blogs/Fast-atoi-in-c(++)_8279372928.html)

8
scripts/add_blog
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@ -2,11 +2,11 @@
""" Adds a new blog """
import os
import random
import subprocess
import sys
import markdown
import random
import markdown
from bs4 import BeautifulSoup as bs
CHARACTER_MAP = {"/": "_", " ": "-", "?": "_", "#": "_", "<": "_", ">": "_", "\\": "_"}
@ -71,7 +71,9 @@ def sanitise_title(title: str) -> str:
for character, replacement in CHARACTER_MAP.items():
final = final.replace(character, replacement)
return f"{final[0:64]}_{random.randint(10_000, 10_000_000_000)}".capitalize()
return (
f"{final[0:64]}_{random.randint(-10_000_000_000, 10_000_000_000)}".capitalize()
)
def main() -> int: