1 /* 2 * Copyright (c) 2016-2017, 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 #ifndef DUMP_UTIL 30 #define DUMP_UTIL 31 32 #include "noncopyable.h" 33 34 #include <cstdio> 35 #include <memory> 36 #include <string> 37 38 namespace ue2 { 39 40 /** 41 * Same as fopen(), but on error throws an exception rather than returning NULL. 42 */ 43 FILE *fopen_or_throw(const char *path, const char *mode); 44 45 /** 46 * \brief Helper class: wraps C stdio FILE* handle and takes care of closing 47 * the file on destruction. 48 */ 49 class StdioFile : noncopyable { 50 public: StdioFile(const std::string & filename,const char * mode)51 StdioFile(const std::string &filename, const char *mode) 52 : handle(fopen_or_throw(filename.c_str(), mode), &fclose) {} 53 54 // Implicit conversion to FILE* for use by stdio calls. 55 operator FILE *() { return handle.get(); } 56 57 private: 58 std::unique_ptr<FILE, decltype(&fclose)> handle; 59 }; 60 61 } // namespace ue2 62 63 #endif 64