Slides for 4xxx.

[libguestfs-talks.git] / 2020-frama-c / 4300-range-make-empty.html

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+<h1>qemu range_make_empty()</h1>
+
+<pre class="code">
+  /* Initialize range to the empty range */
+  <span class="comment">/*@
+    requires \valid(range);
+    requires valid_range(*range);
+    assigns *range;
+    ensures empty_range(*range);
+   */</span>
+  static inline void range_make_empty(Range *range)
+  {
+      *range = range_empty;
+      assert(range_is_empty(range));
+  }
+</pre>