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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/libtasn1/merge_requests/9#note_190287741">lib/coding.c</a>:
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1013
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1013
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<pre style="margin: 0;"> <span id="LC1013" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> *   length needed.</span></span>
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1014
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<pre style="margin: 0;"> <span id="LC1014" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> **/</span></span>
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1015
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="c"><span class="kt" style="color: #458; font-weight: 600;">int</span></span>
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1016
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<pre style="margin: 0;">-<span id="LC1016" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">asn1_der_coding</span> <span class="p">(</span><span class="n" style="color: #333;">asn1_node</span> <span class="n" style="color: #333;">element</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <span class="kt" style="color: #458; font-weight: 600;">char</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">ider</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">len</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC1016" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">asn1_der_coding</span> <span class="p">(</span><span class="n" style="color: #333;">asn1_node<span class="idiff left right">_const</span></span> <span class="n" style="color: #333;">element</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <span class="kt" style="color: #458; font-weight: 600;">char</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">void</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">ider</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">len</span><span class="p">,</span></span>
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<p dir="auto">No why ? a const argument is just a promise that the called function doesn't change the memory it points to. Same with char pointers: you can give a 'char *' to a function argument that is 'const char *'. But if you try it the other way round, you'll see a warning (giving a 'const char *' to a 'char *' function argument).</p>
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