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comparison: extensions/universalchardet/src/base/nsCharSetProber.h
extensions/universalchardet/src/base/nsCharSetProber.h
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| 1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 #ifndef nsCharSetProber_h__ | |
| 6 #define nsCharSetProber_h__ | |
| 7 | |
| 8 #include "nscore.h" | |
| 9 | |
| 10 //#define DEBUG_chardet // Uncomment this for debug dump. | |
| 11 | |
| 12 typedef enum { | |
| 13 eDetecting = 0, //We are still detecting, no sure answer yet, but caller can ask for confidence. | |
| 14 eFoundIt = 1, //That's a positive answer | |
| 15 eNotMe = 2 //Negative answer | |
| 16 } nsProbingState; | |
| 17 | |
| 18 #define SHORTCUT_THRESHOLD (float)0.95 | |
| 19 | |
| 20 class nsCharSetProber { | |
| 21 public: | |
| 22 virtual ~nsCharSetProber() {} | |
| 23 virtual const char* GetCharSetName() = 0; | |
| 24 virtual nsProbingState HandleData(const char* aBuf, uint32_t aLen) = 0; | |
| 25 virtual nsProbingState GetState(void) = 0; | |
| 26 virtual void Reset(void) = 0; | |
| 27 virtual float GetConfidence(void) = 0; | |
| 28 | |
| 29 #ifdef DEBUG_chardet | |
| 30 virtual void DumpStatus() {}; | |
| 31 #endif | |
| 32 | |
| 33 // Helper functions used in the Latin1 and Group probers. | |
| 34 // both functions Allocate a new buffer for newBuf. This buffer should be | |
| 35 // freed by the caller using PR_FREEIF. | |
| 36 // Both functions return false in case of memory allocation failure. | |
| 37 static bool FilterWithoutEnglishLetters(const char* aBuf, uint32_t aLen, char** newBuf, uint32_t& newLen); | |
| 38 static bool FilterWithEnglishLetters(const char* aBuf, uint32_t aLen, char** newBuf, uint32_t& newLen); | |
| 39 | |
| 40 }; | |
| 41 | |
| 42 #endif /* nsCharSetProber_h__ */ |
