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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a>
commented on a
discussion on <a href="https://gitlab.com/gnutls/gnutls/merge_requests/1092#note_230235690">lib/str.c</a>:
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<pre style="margin: 0;"> <span id="LC289" class="line" lang="c"> <span class="n" style="color: #333;">gnutls_datum_t</span> <span class="n" style="color: #333;">tdata</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC290" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC291" class="line" lang="c"> <span class="n" style="color: #333;">_gnutls_buffer_pop_datum</span><span class="p">(</span><span class="n" style="color: #333;">str</span><span class="p">,</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">tdata</span><span class="p">,</span> <span class="n" style="color: #333;">req_size</span><span class="p">);</span></span>
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<pre style="margin: 0;">-<span id="LC292" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">tdata</span><span class="p">.</span><span class="n" style="color: #333;">data</span> <span class="o" style="font-weight: 600;">==</span> <span class="nb" style="color: #0086b3;">NULL</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">tdata</span><span class="p">.</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;"><span class="idiff left right">!=</span></span> <span class="n" style="color: #333;">req_size</span><span class="p">)</span> <span class="p">{</span></span>
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<pre style="margin: 0;">+<span id="LC292" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">tdata</span><span class="p">.</span><span class="n" style="color: #333;">data</span> <span class="o" style="font-weight: 600;">==</span> <span class="nb" style="color: #0086b3;">NULL</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">tdata</span><span class="p">.</span><span class="n" style="color: #333;">size</span> <span class="o" style="font-weight: 600;"><span class="idiff left right">></span></span> <span class="n" style="color: #333;">req_size</span><span class="p">)</span> <span class="p">{</span></span>
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<p dir="auto">I understand. But <code>tdata.size != req_size</code> is really not practical since you need to know the exact size in advance, else the function fails.</p>
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