The Tor Browser: extensions/universalchardet/src/base/nsCharSetProber.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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__

     8 #include "nscore.h"

    10 //#define DEBUG_chardet // Uncomment this for debug dump.

    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;

    18 #define SHORTCUT_THRESHOLD      (float)0.95

    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;

    29 #ifdef DEBUG_chardet

    30   virtual void  DumpStatus() {};

    31 #endif

    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);

    40 };

    42 #endif /* nsCharSetProber_h__ */

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