Slides for 4xxx.

[libguestfs-talks.git] / 2020-frama-c / 4200-range-contains-2.html

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+<h1>qemu range_contains()</h1>
+
+<pre class="code">
+  <span class="comment">/*@
+    predicate value_in_range(struct Range range, uint64_t value) =
+      range.lob <= value <= range.upb;
+  */</span>
+
+  /* Does range contain val? */
+  <span class="comment">/*@
+    requires \valid_read(range);
+    requires valid_range(*range);
+    assigns \nothing;
+    ensures \result <==> value_in_range(*range, val);
+   */</span>
+  static inline bool range_contains(const Range *range, uint64_t val)
+  {
+      return val >= range->lob && val <= range->upb;
+  }
+</pre>