KDECore
nsCharSetProber.h
Go to the documentation of this file.00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 00002 /* -*- C++ -*- 00003 * Copyright (C) 1998 <developer@mozilla.org> 00004 * 00005 * 00006 * Permission is hereby granted, free of charge, to any person obtaining 00007 * a copy of this software and associated documentation files (the 00008 * "Software"), to deal in the Software without restriction, including 00009 * without limitation the rights to use, copy, modify, merge, publish, 00010 * distribute, sublicense, and/or sell copies of the Software, and to 00011 * permit persons to whom the Software is furnished to do so, subject to 00012 * the following conditions: 00013 * 00014 * The above copyright notice and this permission notice shall be included 00015 * in all copies or substantial portions of the Software. 00016 * 00017 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00018 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00019 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00020 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00021 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00022 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00023 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00024 */ 00025 00026 #ifndef nsCharSetProber_h__ 00027 #define nsCharSetProber_h__ 00028 00029 #include "kencodingprober.h" 00030 00031 #include "kdemacros.h" 00032 00033 namespace kencodingprober { 00034 typedef enum { 00035 eDetecting = 0, //We are still detecting, no sure answer yet, but caller can ask for confidence. 00036 eFoundIt = 1, //That's a positive answer 00037 eNotMe = 2 //Negative answer 00038 } nsProbingState; 00039 00040 #define SHORTCUT_THRESHOLD (float)0.95 00041 00042 class KDE_NO_EXPORT nsCharSetProber { 00043 public: 00044 virtual ~nsCharSetProber() {}; 00045 virtual const char* GetCharSetName() = 0; 00046 virtual nsProbingState HandleData(const char* aBuf, unsigned int aLen) = 0; 00047 virtual nsProbingState GetState(void) = 0; 00048 virtual void Reset(void) = 0; 00049 virtual float GetConfidence(void) = 0; 00050 virtual void SetOpion() = 0; 00051 00052 #ifdef DEBUG_PROBE 00053 virtual void DumpStatus() {}; 00054 #endif 00055 00056 // Helper functions used in the Latin1 and Group probers. 00057 // both functions Allocate a new buffer for newBuf. This buffer should be 00058 // freed by the caller using PR_FREEIF. 00059 // Both functions return false in case of memory allocation failure. 00060 static bool FilterWithoutEnglishLetters(const char* aBuf, unsigned int aLen, char** newBuf, unsigned int& newLen); 00061 static bool FilterWithEnglishLetters(const char* aBuf, unsigned int aLen, char** newBuf, unsigned int& newLen); 00062 00063 }; 00064 } 00065 #endif /* nsCharSetProber_h__ */