Slides for 4xxx.

[libguestfs-talks.git] / 2020-frama-c / 4850-range-init.html

diff --git a/2020-frama-c/4850-range-init.html b/2020-frama-c/4850-range-init.html
new file mode 100644 (file)
index 0000000..3e9d01e
--- /dev/null
+++ b/2020-frama-c/4850-range-init.html
@@ -0,0 +1,30 @@
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+<link rel="stylesheet" href="style.css" type="text/css"/>
+<script src="code.js" type="text/javascript"></script>
+
+<h1>qemu range_init_nofail()</h1>
+
+<pre class="code">
+  /*
+   * Initialize range to span the interval [lob,lob + size - 1].
+   * size may be 0. Range must not overflow.
+   */
+  static inline void range_init_nofail(Range *range, uint64_t lob,
+                                       uint64_t size)
+  {
+      range->lob = lob;
+      range->upb = lob + size - 1;
+  }
+</pre>
+<pre>
+  lob == 0  size == 0
+  ┌─────────────────────────────────────────────────┐ 
+  │░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░│
+  └─────────────────────────────────────────────────┘
+</pre>
+<pre>
+  lob == 1  size == 0
+  ┌─────────────────────────────────────────────────┐ 
+  │ │                                               │
+  └─────────────────────────────────────────────────┘
+</pre>