Initial commit of Hyperscan

src/util/depth.cpp

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2015, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file
+ * \brief Data types used to represent depth quantities.
+ */
+#include "depth.h"
+#include "ue2common.h"
+
+#include <algorithm> // std::min, std::max
+
+namespace ue2 {
+
+DepthMinMax unionDepthMinMax(const DepthMinMax &a, const DepthMinMax &b) {
+    DepthMinMax rv;
+
+    if (a.min.is_unreachable()) {
+        rv.min = b.min;
+    } else if (b.min.is_unreachable()) {
+        rv.min = a.min;
+    } else {
+        rv.min = std::min(a.min, b.min);
+    }
+
+    if (a.max.is_infinite() || b.max.is_infinite()) {
+        rv.max = depth::infinity();
+    } else if (a.max.is_unreachable()) {
+        rv.max = b.max;
+    } else if (b.max.is_unreachable()) {
+        rv.max = a.max;
+    } else {
+        rv.max = std::max(a.max, b.max);
+    }
+
+    return rv;
+}
+
+} // namespace ue2
+
+#ifdef DUMP_SUPPORT
+
+#include <sstream>
+#include <string>
+
+namespace ue2 {
+
+std::string depth::str() const {
+    if (is_unreachable()) {
+        return "unr";
+    } else if (is_infinite()) {
+        return "inf";
+    }
+    std::ostringstream oss;
+    oss << val;
+    return oss.str();
+}
+
+std::string DepthMinMax::str() const {
+    std::ostringstream oss;
+    oss << "[" << min.str() << "," << max.str() << "]";
+    return oss.str();
+}
+
+} // namespace ue2
+
+#endif // DUMP_SUPPORT