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<th class=docs><h1>blame.c</h1></th>
<th class=code></th>
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<tbody>
<tr id='section-1'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-1">¶</a>
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</td>
<td class=code>
<div class='highlight'><pre><span class="cm">/*</span>
<span class="cm"> * libgit2 "blame" example - shows how to use the blame API</span>
<span class="cm"> *</span>
<span class="cm"> * Written by the libgit2 contributors</span>
<span class="cm"> *</span>
<span class="cm"> * To the extent possible under law, the author(s) have dedicated all copyright</span>
<span class="cm"> * and related and neighboring rights to this software to the public domain</span>
<span class="cm"> * worldwide. This software is distributed without any warranty.</span>
<span class="cm"> *</span>
<span class="cm"> * You should have received a copy of the CC0 Public Domain Dedication along</span>
<span class="cm"> * with this software. If not, see</span>
<span class="cm"> * <http://creativecommons.org/publicdomain/zero/1.0/>.</span>
<span class="cm"> */</span>
<span class="cp">#include "common.h"</span>
<span class="cp">#ifdef _MSC_VER</span>
<span class="cp">#define snprintf sprintf_s</span>
<span class="cp">#define strcasecmp strcmpi</span>
<span class="cp">#endif</span></pre></div>
</td>
</tr>
<tr id='section-2'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p>This example demonstrates how to invoke the libgit2 blame API to roughly
simulate the output of <code>git blame</code> and a few of its command line arguments.</p>
</td>
<td class=code>
<div class='highlight'><pre><span class="k">struct</span> <span class="n">opts</span> <span class="p">{</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">path</span><span class="p">;</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">commitspec</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">C</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">M</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">start_line</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">end_line</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">F</span><span class="p">;</span>
<span class="p">};</span>
<span class="k">static</span> <span class="kt">void</span> <span class="nf">parse_opts</span><span class="p">(</span><span class="k">struct</span> <span class="n">opts</span> <span class="o">*</span><span class="n">o</span><span class="p">,</span> <span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">*</span><span class="n">argv</span><span class="p">[]);</span>
<span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">*</span><span class="n">argv</span><span class="p">[])</span>
<span class="p">{</span>
<span class="kt">int</span> <span class="n">line</span><span class="p">,</span> <span class="n">break_on_null_hunk</span><span class="p">;</span>
<span class="kt">size_t</span> <span class="n">i</span><span class="p">,</span> <span class="n">rawsize</span><span class="p">;</span>
<span class="kt">char</span> <span class="n">spec</span><span class="p">[</span><span class="mi">1024</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="k">struct</span> <span class="n">opts</span> <span class="n">o</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">rawdata</span><span class="p">;</span>
<span class="n">git_repository</span> <span class="o">*</span><span class="n">repo</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
<span class="n">git_revspec</span> <span class="n">revspec</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="n">git_blame_options</span> <span class="n">blameopts</span> <span class="o">=</span> <span class="n">GIT_BLAME_OPTIONS_INIT</span><span class="p">;</span>
<span class="n">git_blame</span> <span class="o">*</span><span class="n">blame</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span>
<span class="n">git_blob</span> <span class="o">*</span><span class="n">blob</span><span class="p">;</span>
<span class="n">git_object</span> <span class="o">*</span><span class="n">obj</span><span class="p">;</span>
<span class="n"><a name="git_libgit2_init-8" class="fnlink" href="../../#v0.24.6/group/libgit2/git_libgit2_init">git_libgit2_init</a></span><span class="p">();</span>
<span class="n">parse_opts</span><span class="p">(</span><span class="o">&</span><span class="n">o</span><span class="p">,</span> <span class="n">argc</span><span class="p">,</span> <span class="n">argv</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n">o</span><span class="p">.</span><span class="n">M</span><span class="p">)</span> <span class="n">blameopts</span><span class="p">.</span><span class="n">flags</span> <span class="o">|=</span> <span class="n">GIT_BLAME_TRACK_COPIES_SAME_COMMIT_MOVES</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">o</span><span class="p">.</span><span class="n">C</span><span class="p">)</span> <span class="n">blameopts</span><span class="p">.</span><span class="n">flags</span> <span class="o">|=</span> <span class="n">GIT_BLAME_TRACK_COPIES_SAME_COMMIT_COPIES</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">o</span><span class="p">.</span><span class="n">F</span><span class="p">)</span> <span class="n">blameopts</span><span class="p">.</span><span class="n">flags</span> <span class="o">|=</span> <span class="n">GIT_BLAME_FIRST_PARENT</span><span class="p">;</span></pre></div>
</td>
</tr>
<tr id='section-3'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>Open the repository.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_repository_open_ext-24" class="fnlink" href="../../#v0.24.6/group/repository/git_repository_open_ext">git_repository_open_ext</a></span><span class="p">(</span><span class="o">&</span><span class="n">repo</span><span class="p">,</span> <span class="s">"."</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">),</span> <span class="s">"Couldn't open repository"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-4'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>The commit range comes in "commitish" form. Use the rev-parse API to
nail down the end points.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="n">o</span><span class="p">.</span><span class="n">commitspec</span><span class="p">)</span> <span class="p">{</span>
<span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_revparse-27" class="fnlink" href="../../#v0.24.6/group/revparse/git_revparse">git_revparse</a></span><span class="p">(</span><span class="o">&</span><span class="n">revspec</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">o</span><span class="p">.</span><span class="n">commitspec</span><span class="p">),</span> <span class="s">"Couldn't parse commit spec"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">flags</span> <span class="o">&</span> <span class="n">GIT_REVPARSE_SINGLE</span><span class="p">)</span> <span class="p">{</span>
<span class="n"><a name="git_oid_cpy-20" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_cpy">git_oid_cpy</a></span><span class="p">(</span><span class="o">&</span><span class="n">blameopts</span><span class="p">.</span><span class="n">newest_commit</span><span class="p">,</span> <span class="n"><a name="git_object_id-10" class="fnlink" href="../../#v0.24.6/group/object/git_object_id">git_object_id</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">from</span><span class="p">));</span>
<span class="n"><a name="git_object_free-14" class="fnlink" href="../../#v0.24.6/group/object/git_object_free">git_object_free</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">from</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="n"><a name="git_oid_cpy-21" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_cpy">git_oid_cpy</a></span><span class="p">(</span><span class="o">&</span><span class="n">blameopts</span><span class="p">.</span><span class="n">oldest_commit</span><span class="p">,</span> <span class="n"><a name="git_object_id-11" class="fnlink" href="../../#v0.24.6/group/object/git_object_id">git_object_id</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">from</span><span class="p">));</span>
<span class="n"><a name="git_oid_cpy-22" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_cpy">git_oid_cpy</a></span><span class="p">(</span><span class="o">&</span><span class="n">blameopts</span><span class="p">.</span><span class="n">newest_commit</span><span class="p">,</span> <span class="n"><a name="git_object_id-12" class="fnlink" href="../../#v0.24.6/group/object/git_object_id">git_object_id</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">to</span><span class="p">));</span>
<span class="n"><a name="git_object_free-15" class="fnlink" href="../../#v0.24.6/group/object/git_object_free">git_object_free</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">from</span><span class="p">);</span>
<span class="n"><a name="git_object_free-16" class="fnlink" href="../../#v0.24.6/group/object/git_object_free">git_object_free</a></span><span class="p">(</span><span class="n">revspec</span><span class="p">.</span><span class="n">to</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-5'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Run the blame.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_blame_file-2" class="fnlink" href="../../#v0.24.6/group/blame/git_blame_file">git_blame_file</a></span><span class="p">(</span><span class="o">&</span><span class="n">blame</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">o</span><span class="p">.</span><span class="n">path</span><span class="p">,</span> <span class="o">&</span><span class="n">blameopts</span><span class="p">),</span> <span class="s">"Blame error"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-6'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>Get the raw data inside the blob for output. We use the
<code>commitish:path/to/file.txt</code> format to find it.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="k">if</span> <span class="p">(</span><span class="n"><a name="git_oid_iszero-23" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_iszero">git_oid_iszero</a></span><span class="p">(</span><span class="o">&</span><span class="n">blameopts</span><span class="p">.</span><span class="n">newest_commit</span><span class="p">))</span>
<span class="n">strcpy</span><span class="p">(</span><span class="n">spec</span><span class="p">,</span> <span class="s">"HEAD"</span><span class="p">);</span>
<span class="k">else</span>
<span class="n"><a name="git_oid_tostr-18" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_tostr">git_oid_tostr</a></span><span class="p">(</span><span class="n">spec</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">spec</span><span class="p">),</span> <span class="o">&</span><span class="n">blameopts</span><span class="p">.</span><span class="n">newest_commit</span><span class="p">);</span>
<span class="n">strcat</span><span class="p">(</span><span class="n">spec</span><span class="p">,</span> <span class="s">":"</span><span class="p">);</span>
<span class="n">strcat</span><span class="p">(</span><span class="n">spec</span><span class="p">,</span> <span class="n">o</span><span class="p">.</span><span class="n">path</span><span class="p">);</span>
<span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_revparse_single-26" class="fnlink" href="../../#v0.24.6/group/revparse/git_revparse_single">git_revparse_single</a></span><span class="p">(</span><span class="o">&</span><span class="n">obj</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n">spec</span><span class="p">),</span> <span class="s">"Object lookup error"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">check_lg2</span><span class="p">(</span><span class="n"><a name="git_blob_lookup-4" class="fnlink" href="../../#v0.24.6/group/blob/git_blob_lookup">git_blob_lookup</a></span><span class="p">(</span><span class="o">&</span><span class="n">blob</span><span class="p">,</span> <span class="n">repo</span><span class="p">,</span> <span class="n"><a name="git_object_id-13" class="fnlink" href="../../#v0.24.6/group/object/git_object_id">git_object_id</a></span><span class="p">(</span><span class="n">obj</span><span class="p">)),</span> <span class="s">"Blob lookup error"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n"><a name="git_object_free-17" class="fnlink" href="../../#v0.24.6/group/object/git_object_free">git_object_free</a></span><span class="p">(</span><span class="n">obj</span><span class="p">);</span>
<span class="n">rawdata</span> <span class="o">=</span> <span class="n"><a name="git_blob_rawcontent-6" class="fnlink" href="../../#v0.24.6/group/blob/git_blob_rawcontent">git_blob_rawcontent</a></span><span class="p">(</span><span class="n">blob</span><span class="p">);</span>
<span class="n">rawsize</span> <span class="o">=</span> <span class="n"><a name="git_blob_rawsize-7" class="fnlink" href="../../#v0.24.6/group/blob/git_blob_rawsize">git_blob_rawsize</a></span><span class="p">(</span><span class="n">blob</span><span class="p">);</span></pre></div>
</td>
</tr>
<tr id='section-7'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>Produce the output.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n">line</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="mi">0</span><span class="p">;</span>
<span class="n">break_on_null_hunk</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="k">while</span> <span class="p">(</span><span class="n">i</span> <span class="o"><</span> <span class="n">rawsize</span><span class="p">)</span> <span class="p">{</span>
<span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">eol</span> <span class="o">=</span> <span class="n">memchr</span><span class="p">(</span><span class="n">rawdata</span> <span class="o">+</span> <span class="n">i</span><span class="p">,</span> <span class="sc">'\n'</span><span class="p">,</span> <span class="n">rawsize</span> <span class="o">-</span> <span class="n">i</span><span class="p">);</span>
<span class="kt">char</span> <span class="n">oid</span><span class="p">[</span><span class="mi">10</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="k">const</span> <span class="n">git_blame_hunk</span> <span class="o">*</span><span class="n">hunk</span> <span class="o">=</span> <span class="n"><a name="git_blame_get_hunk_byline-1" class="fnlink" href="../../#v0.24.6/group/blame/git_blame_get_hunk_byline">git_blame_get_hunk_byline</a></span><span class="p">(</span><span class="n">blame</span><span class="p">,</span> <span class="n">line</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="n">break_on_null_hunk</span> <span class="o">&&</span> <span class="o">!</span><span class="n">hunk</span><span class="p">)</span>
<span class="k">break</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">hunk</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">char</span> <span class="n">sig</span><span class="p">[</span><span class="mi">128</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="n">break_on_null_hunk</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="n"><a name="git_oid_tostr-19" class="fnlink" href="../../#v0.24.6/group/oid/git_oid_tostr">git_oid_tostr</a></span><span class="p">(</span><span class="n">oid</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="o">&</span><span class="n">hunk</span><span class="o">-></span><span class="n">final_commit_id</span><span class="p">);</span>
<span class="n">snprintf</span><span class="p">(</span><span class="n">sig</span><span class="p">,</span> <span class="mi">30</span><span class="p">,</span> <span class="s">"%s <%s>"</span><span class="p">,</span> <span class="n">hunk</span><span class="o">-></span><span class="n">final_signature</span><span class="o">-></span><span class="n">name</span><span class="p">,</span> <span class="n">hunk</span><span class="o">-></span><span class="n">final_signature</span><span class="o">-></span><span class="n">email</span><span class="p">);</span>
<span class="n">printf</span><span class="p">(</span><span class="s">"%s ( %-30s %3d) %.*s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span>
<span class="n">oid</span><span class="p">,</span>
<span class="n">sig</span><span class="p">,</span>
<span class="n">line</span><span class="p">,</span>
<span class="p">(</span><span class="kt">int</span><span class="p">)(</span><span class="n">eol</span> <span class="o">-</span> <span class="n">rawdata</span> <span class="o">-</span> <span class="n">i</span><span class="p">),</span>
<span class="n">rawdata</span> <span class="o">+</span> <span class="n">i</span><span class="p">);</span>
<span class="p">}</span>
<span class="n">i</span> <span class="o">=</span> <span class="p">(</span><span class="kt">int</span><span class="p">)(</span><span class="n">eol</span> <span class="o">-</span> <span class="n">rawdata</span> <span class="o">+</span> <span class="mi">1</span><span class="p">);</span>
<span class="n">line</span><span class="o">++</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-8'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>Cleanup.</p>
</td>
<td class=code>
<div class='highlight'><pre> <span class="n"><a name="git_blob_free-5" class="fnlink" href="../../#v0.24.6/group/blob/git_blob_free">git_blob_free</a></span><span class="p">(</span><span class="n">blob</span><span class="p">);</span>
<span class="n"><a name="git_blame_free-3" class="fnlink" href="../../#v0.24.6/group/blame/git_blame_free">git_blame_free</a></span><span class="p">(</span><span class="n">blame</span><span class="p">);</span>
<span class="n"><a name="git_repository_free-25" class="fnlink" href="../../#v0.24.6/group/repository/git_repository_free">git_repository_free</a></span><span class="p">(</span><span class="n">repo</span><span class="p">);</span>
<span class="n"><a name="git_libgit2_shutdown-9" class="fnlink" href="../../#v0.24.6/group/libgit2/git_libgit2_shutdown">git_libgit2_shutdown</a></span><span class="p">();</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-9'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-9">¶</a>
</div>
<p>Tell the user how to make this thing work.</p>
</td>
<td class=code>
<div class='highlight'><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">usage</span><span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">msg</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">arg</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="n">msg</span> <span class="o">&&</span> <span class="n">arg</span><span class="p">)</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">arg</span><span class="p">);</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"%s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">msg</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"usage: blame [options] [<commit range>] <path></span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">" <commit range> example: `HEAD~10..HEAD`, or `1234abcd`</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">" -L <n,m> process only line range n-m, counting from 1</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">" -M find line moves within and across files</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">" -C find line copies within and across files</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">" -F follow only the first parent commits</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">fprintf</span><span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>
<span class="n">exit</span><span class="p">(</span><span class="mi">1</span><span class="p">);</span>
<span class="p">}</span></pre></div>
</td>
</tr>
<tr id='section-10'>
<td class=docs>
<div class="pilwrap">
<a class="pilcrow" href="#section-10">¶</a>
</div>
<p>Parse the arguments.</p>
</td>
<td class=code>
<div class='highlight'><pre><span class="k">static</span> <span class="kt">void</span> <span class="nf">parse_opts</span><span class="p">(</span><span class="k">struct</span> <span class="n">opts</span> <span class="o">*</span><span class="n">o</span><span class="p">,</span> <span class="kt">int</span> <span class="n">argc</span><span class="p">,</span> <span class="kt">char</span> <span class="o">*</span><span class="n">argv</span><span class="p">[])</span>
<span class="p">{</span>
<span class="kt">int</span> <span class="n">i</span><span class="p">;</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">bare_args</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="k">if</span> <span class="p">(</span><span class="n">argc</span> <span class="o"><</span> <span class="mi">2</span><span class="p">)</span> <span class="n">usage</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="k">for</span> <span class="p">(</span><span class="n">i</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="n">argc</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">char</span> <span class="o">*</span><span class="n">a</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="n">a</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="sc">'-'</span><span class="p">)</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="k">while</span> <span class="p">(</span><span class="n">bare_args</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">&&</span> <span class="n">i</span> <span class="o"><</span> <span class="mi">3</span><span class="p">)</span> <span class="o">++</span><span class="n">i</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="n">i</span> <span class="o">>=</span> <span class="mi">3</span><span class="p">)</span>
<span class="n">usage</span><span class="p">(</span><span class="s">"Invalid argument set"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">bare_args</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">a</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"--"</span><span class="p">))</span>
<span class="k">continue</span><span class="p">;</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcasecmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"-M"</span><span class="p">))</span>
<span class="n">o</span><span class="o">-></span><span class="n">M</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcasecmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"-C"</span><span class="p">))</span>
<span class="n">o</span><span class="o">-></span><span class="n">C</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcasecmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"-F"</span><span class="p">))</span>
<span class="n">o</span><span class="o">-></span><span class="n">F</span> <span class="o">=</span> <span class="mi">1</span><span class="p">;</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">strcasecmp</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"-L"</span><span class="p">))</span> <span class="p">{</span>
<span class="n">i</span><span class="o">++</span><span class="p">;</span> <span class="n">a</span> <span class="o">=</span> <span class="n">argv</span><span class="p">[</span><span class="n">i</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="n">i</span> <span class="o">>=</span> <span class="n">argc</span><span class="p">)</span> <span class="n">fatal</span><span class="p">(</span><span class="s">"Not enough arguments to -L"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">check_lg2</span><span class="p">(</span><span class="n">sscanf</span><span class="p">(</span><span class="n">a</span><span class="p">,</span> <span class="s">"%d,%d"</span><span class="p">,</span> <span class="o">&</span><span class="n">o</span><span class="o">-></span><span class="n">start_line</span><span class="p">,</span> <span class="o">&</span><span class="n">o</span><span class="o">-></span><span class="n">end_line</span><span class="p">)</span><span class="o">-</span><span class="mi">2</span><span class="p">,</span> <span class="s">"-L format error"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">else</span> <span class="p">{</span>
<span class="cm">/* commit range */</span>
<span class="k">if</span> <span class="p">(</span><span class="n">o</span><span class="o">-></span><span class="n">commitspec</span><span class="p">)</span> <span class="n">fatal</span><span class="p">(</span><span class="s">"Only one commit spec allowed"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">o</span><span class="o">-></span><span class="n">commitspec</span> <span class="o">=</span> <span class="n">a</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="cm">/* Handle the bare arguments */</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">bare_args</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="n">usage</span><span class="p">(</span><span class="s">"Please specify a path"</span><span class="p">,</span> <span class="nb">NULL</span><span class="p">);</span>
<span class="n">o</span><span class="o">-></span><span class="n">path</span> <span class="o">=</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="n">bare_args</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span> <span class="p">{</span>
<span class="cm">/* <commitspec> <path> */</span>
<span class="n">o</span><span class="o">-></span><span class="n">path</span> <span class="o">=</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">1</span><span class="p">];</span>
<span class="n">o</span><span class="o">-></span><span class="n">commitspec</span> <span class="o">=</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">0</span><span class="p">];</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="n">bare_args</span><span class="p">[</span><span class="mi">2</span><span class="p">])</span> <span class="p">{</span>
<span class="cm">/* <oldcommit> <newcommit> <path> */</span>
<span class="kt">char</span> <span class="n">spec</span><span class="p">[</span><span class="mi">128</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span><span class="mi">0</span><span class="p">};</span>
<span class="n">o</span><span class="o">-></span><span class="n">path</span> <span class="o">=</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">2</span><span class="p">];</span>
<span class="n">sprintf</span><span class="p">(</span><span class="n">spec</span><span class="p">,</span> <span class="s">"%s..%s"</span><span class="p">,</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">bare_args</span><span class="p">[</span><span class="mi">1</span><span class="p">]);</span>
<span class="n">o</span><span class="o">-></span><span class="n">commitspec</span> <span class="o">=</span> <span class="n">spec</span><span class="p">;</span>
<span class="p">}</span>
<span class="p">}</span></pre></div>
</td>
</tr>
</table>
</div>
</body>
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