Initial commit of Hyperscan

src/nfa/shufticompile.h

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+/*
+ * 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 Shufti acceleration: compile code.
+ */
+
+#ifndef SHUFTI_COMPILE_H
+#define SHUFTI_COMPILE_H
+
+#include "ue2common.h"
+#include "util/charreach.h"
+#include "util/ue2_containers.h"
+
+#include <utility>
+
+namespace ue2 {
+
+/** \brief Single-byte variant.
+ *
+ * Returns -1 if unable to construct masks, otherwise returns number of bits
+ * used in the mask.
+ *
+ * Note: always able to construct masks for 8 or fewer characters.
+ */
+int shuftiBuildMasks(const CharReach &chars, m128 *lo, m128 *hi);
+
+void shuftiBuildDoubleMasks(const CharReach &onechar,
+                            const flat_set<std::pair<u8, u8>> &twochar,
+                            m128 *lo1, m128 *hi1, m128 *lo2, m128 *hi2);
+
+void mergeShuftiMask(m128 *lo, const m128 lo_in, u32 lo_bits);
+
+#ifdef DUMP_SUPPORT
+
+/**
+ * \brief Dump code: returns a CharReach with the reach that would match this
+ * shufti.
+ */
+CharReach shufti2cr(const m128 lo, const m128 hi);
+
+#endif // DUMP_SUPPORT
+
+} // namespace ue2
+
+#endif // SHUFTI_COMPILE_H