1 /* 2 * Copyright (c) 2015-2017, Intel Corporation 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * * Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of Intel Corporation nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** \file 30 * \brief UTF-8 transforms and operations. 31 */ 32 33 #ifndef NG_UTF8_H 34 #define NG_UTF8_H 35 36 namespace ue2 { 37 38 class ExpressionInfo; 39 class NGHolder; 40 41 /** \brief Relax forbidden UTF-8 sequences. 42 * 43 * Some byte sequences can not appear in valid UTF-8 as they encode code points 44 * above \\x{10ffff} or they represent overlong encodings. As we require valid 45 * UTF-8 input, we have no defined behaviour in these cases, as a result we can 46 * accept them if it simplifies the graph. */ 47 void relaxForbiddenUtf8(NGHolder &g, const ExpressionInfo &expr); 48 49 /** \brief Contract cycles of UTF-8 code points down to a single cyclic vertex 50 * where possible, based on the assumption that we will always be matching 51 * against well-formed input. 52 */ 53 void utf8DotRestoration(NGHolder &h, bool som); 54 55 } // namespace ue2 56 57 #endif 58