1 /* 2 * Copyright (c) 1998-2007 Matthijs Hollemans 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 * DEALINGS IN THE SOFTWARE. 21 */ 22 #ifndef GREPPER_H 23 #define GREPPER_H 24 25 #include <Messenger.h> 26 27 class FileIterator; 28 class Model; 29 30 // Executes "grep" in a background thread. 31 class Grepper { 32 public: 33 Grepper(const char* pattern, const Model* model, 34 const BHandler* target, 35 FileIterator* iterator); 36 virtual ~Grepper(); 37 38 bool IsValid() const; 39 40 void Start(); 41 void Cancel(); 42 43 private: 44 // Spawns the real grepper thread. 45 static int32 _SpawnThread(void* cookie); 46 47 // The thread function that does the actual grepping. 48 int32 _GrepperThread(); 49 50 // Remembers, and possibly escapes, the search pattern. 51 void _SetPattern(const char* source); 52 53 // Prepends all quotes, dollars and backslashes with at backslash 54 // to prevent the shell from misinterpreting them. 55 bool _EscapeSpecialChars(char* buffer, 56 ssize_t bufferSize); 57 private: 58 // The (escaped) search pattern. 59 char* fPattern; 60 61 // The settings from the model. 62 BMessenger fTarget; 63 bool fEscapeText : 1; 64 bool fCaseSensitive : 1; 65 uint32 fEncoding; 66 67 // The supplier of files to grep 68 FileIterator* fIterator; 69 70 // Our thread's ID. 71 thread_id fThreadId; 72 73 // Whether our thread must quit. 74 volatile bool fMustQuit; 75 }; 76 77 #endif // GREPPER_H 78