-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.xml
108 lines (108 loc) · 15.9 KB
/
index.xml
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Lilimu's Blog</title><link>http://example.org/</link><description>Lilimu's Blog</description><generator>Hugo 0.139.4 & FixIt v0.3.16</generator><language>zh-CN</language><lastBuildDate>Tue, 17 Dec 2024 22:59:09 +0800</lastBuildDate><atom:link href="http://example.org/index.xml" rel="self" type="application/rss+xml"/><item><title>Memcpy踩坑指南</title><link>http://example.org/posts/3470786/</link><pubDate>Mon, 09 Dec 2024 19:30:29 +0800</pubDate><guid>http://example.org/posts/3470786/</guid><category domain="http://example.org/categories/c%E8%AF%AD%E8%A8%80%E7%AC%94%E8%AE%B0/">C语言笔记</category><description><div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
</span><span class="lnt"> 3
</span><span class="lnt"> 4
</span><span class="lnt"> 5
</span><span class="lnt"> 6
</span><span class="lnt"> 7
</span><span class="lnt"> 8
</span><span class="lnt"> 9
</span><span class="lnt">10
</span><span class="lnt">11
</span><span class="lnt">12
</span><span class="lnt">13
</span><span class="lnt">14
</span><span class="lnt">15
</span><span class="lnt">16
</span><span class="lnt">17
</span><span class="lnt">18
</span><span class="lnt">19
</span><span class="lnt">20
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">readfuc</span><span class="p">(</span><span class="kt">uint8_t</span><span class="o">*</span> <span class="n">src</span><span class="p">,</span><span class="kt">uint16_t</span> <span class="n">size</span><span class="p">){</span>
</span></span><span class="line"><span class="cl"> <span class="kt">uint8_t</span> <span class="n">rev_data</span><span class="p">[</span><span class="n">size</span><span class="o">+</span><span class="mi">1</span><span class="p">];</span>
</span></span><span class="line"><span class="cl"> <span class="n">rev_data</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="mh">0xff</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="k">for</span><span class="p">(</span><span class="kt">uint8_t</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span><span class="n">i</span> <span class="o">&lt;</span> <span class="n">size</span> <span class="o">+</span> <span class="mi">1</span><span class="p">;</span><span class="n">i</span><span class="o">++</span><span class="p">){</span>
</span></span><span class="line"><span class="cl"> <span class="n">rev_data</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="nf">memcpy</span><span class="p">(</span><span class="n">src</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span><span class="n">rev_data</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span><span class="n">size</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span>
</span></span><span class="line"><span class="cl">
</span></span><span class="line"><span class="cl"><span class="kt">void</span> <span class="nf">memcpyfuc</span><span class="p">(){</span>
</span></span><span class="line"><span class="cl"> <span class="kt">uint8_t</span> <span class="n">src</span><span class="p">[</span><span class="mi">4</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mh">0xff</span><span class="p">,</span><span class="mh">0xff</span><span class="p">,</span><span class="mh">0xff</span><span class="p">,</span><span class="mh">0xff</span><span class="p">};</span>
</span></span><span class="line"><span class="cl"> <span class="k">for</span><span class="p">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span><span class="n">i</span> <span class="o">&lt;</span> <span class="mi">4</span><span class="p">;</span><span class="n">i</span><span class="o">++</span><span class="p">){</span>
</span></span><span class="line"><span class="cl"> <span class="nf">printf</span><span class="p">(</span><span class="s">&#34;origin data:%X &#34;</span><span class="p">,</span><span class="n">src</span><span class="p">[</span><span class="n">i</span><span class="p">]);</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"> <span class="nf">printf</span><span class="p">(</span><span class="s">&#34;</span><span class="se">\n\r</span><span class="s">&#34;</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="nf">readfuc</span><span class="p">(</span><span class="n">src</span><span class="p">,</span><span class="mi">3</span><span class="p">);</span>
</span></span><span class="line"><span class="cl"> <span class="k">for</span><span class="p">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span><span class="n">i</span> <span class="o">&lt;</span> <span class="mi">4</span><span class="p">;</span><span class="n">i</span><span class="o">++</span><span class="p">){</span>
</span></span><span class="line"><span class="cl"> <span class="nf">printf</span><span class="p">(</span><span class="s">&#34;transed data:%X &#34;</span><span class="p">,</span><span class="n">src</span><span class="p">[</span><span class="n">i</span><span class="p">]);</span>
</span></span><span class="line"><span class="cl"> <span class="p">}</span>
</span></span><span class="line"><span class="cl"><span class="p">}</span></span></span></code></pre></td></tr></table>
</div>
</div><p>编写代码的时候需要使用到 memcpy ,但是由于理解错误，导致了一个奇怪的 bug ，调试了一个多小时才发现
下面是 memcpy() 的函数声明</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="kt">void</span> <span class="o">*</span><span class="nf">memcpy</span><span class="p">(</span><span class="kt">void</span> <span class="o">*</span><span class="n">str1</span><span class="p">,</span> <span class="k">const</span> <span class="kt">void</span> <span class="o">*</span><span class="n">str2</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">n</span><span class="p">)</span></span></span></code></pre></td></tr></table>
</div>
</div><p>我想把数组 <code>int rec_data[4]</code> 中的后三个数据拷贝到 <code>int scr[4]</code> 1 - 3 中
然后我的代码这样写的</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">memcpy(src ,rev_data + 1,3);</span></span></code></pre></td></tr></table>
</div>
</div><p><code>scr[4]</code> 的初始内容是 <code>{0xff,0xff,0xff,0xff}</code>,<code>rec_data[4]</code>的内容是<code>{0x00,0x00,0x00,0x00}</code>,我预期拷贝后<code>scr</code>中的内容是 <code>0Xff 0x00 0x00 0x00</code>,然而他却是 <code>0x00 0x00 0x00 0xff</code>让我百思不得其解,代码看了一遍又一遍，才发现我这样是把<code>rev_data</code>的后三个数据拷贝到<code>scr</code>前三个中，真是哭笑不得。</p></description></item><item><title>My First Post</title><link>http://example.org/posts/583bc6c/</link><pubDate>Tue, 03 Sep 2024 15:40:02 +0800</pubDate><guid>http://example.org/posts/583bc6c/</guid><category domain="http://example.org/categories/%E5%8D%9A%E5%AE%A2/">博客</category><description><h2 id="如何使用-hugo-site-生成一篇文章" class="heading-element"><span>如何使用 hugo site 生成一篇文章</span>
<a href="#%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-hugo-site-%e7%94%9f%e6%88%90%e4%b8%80%e7%af%87%e6%96%87%e7%ab%a0" class="heading-mark">
<svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg>
</a>
</h2><p>网站进入主目录</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl"> hugo new content content/posts/myposts.md</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="如何升级主题" class="heading-element"><span>如何升级主题</span>
<a href="#%e5%a6%82%e4%bd%95%e5%8d%87%e7%ba%a7%e4%b8%bb%e9%a2%98" class="heading-mark">
<svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg>
</a>
</h2><p>在 <code>master</code>分支执行</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback"><span class="line"><span class="cl">git submodule update --remote --merge themes/FixIt</span></span></code></pre></td></tr></table>
</div>
</div><h2 id="如何不发布草稿" class="heading-element"><span>如何不发布草稿</span>
<a href="#%e5%a6%82%e4%bd%95%e4%b8%8d%e5%8f%91%e5%b8%83%e8%8d%89%e7%a8%bf" class="heading-mark">
<svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg>
</a>
</h2><p>修改 github workflow 中的<code>Build Web</code></p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre tabindex="0" class="chroma"><code><span class="lnt">1
</span><span class="lnt">2
</span></code></pre></td>
<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">- name: Build Web
</span></span><span class="line"><span class="cl">run: hugo --minify</span></span></code></pre></td></tr></table>
</div>
</div><p>当文档开头的 draft 选项为 true 时，这篇文档将不会被发布</p>
<h2 id="如何升级-hugo-版本" class="heading-element"><span>如何升级 hugo 版本</span>
<a href="#%e5%a6%82%e4%bd%95%e5%8d%87%e7%ba%a7-hugo-%e7%89%88%e6%9c%ac" class="heading-mark">
<svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg>
</a>
</h2><p>从 github 下载指定版本的安装包，解压后把里面的文件替换到旧版 hugo 安装路径</p>
<p><img loading="lazy" src="../images/hugoUpgrade.png" alt="windows版本的Hugo" srcset="../images/hugoUpgrade.png?size=small, ../images/hugoUpgrade.png?size=medium 1.5x, ../images/hugoUpgrade.png?size=large 2x" data-title="windows版本的Hugo" style="background: url(/images/loading.min.svg) no-repeat center;" onload="this.title=this.dataset.title;for(const i of ['style', 'data-title','onerror','onload']){this.removeAttribute(i);}this.dataset.lazyloaded='';" onerror="this.title=this.dataset.title;for(const i of ['style', 'data-title','onerror','onload']){this.removeAttribute(i);}"/></p></description></item></channel></rss>