1/* -*- C++ -*-
2 SPDX-FileCopyrightText: 1998 Netscape Communications Corporation <developer@mozilla.org>
3
4 SPDX-License-Identifier: MIT
5*/
6
7#ifndef nsCharSetProber_h__
8#define nsCharSetProber_h__
9
10#include "kencodingprober.h"
11
12namespace kencodingprober
13{
14typedef enum {
15 eDetecting = 0, // We are still detecting, no sure answer yet, but caller can ask for confidence.
16 eFoundIt = 1, // That's a positive answer
17 eNotMe = 2, // Negative answer
18} nsProbingState;
19
20#define SHORTCUT_THRESHOLD (float)0.95
21
22class KCODECS_NO_EXPORT nsCharSetProber
23{
24public:
25 virtual ~nsCharSetProber()
26 {
27 }
28 virtual const char *GetCharSetName() = 0;
29 virtual nsProbingState HandleData(const char *aBuf, unsigned int aLen) = 0;
30 virtual nsProbingState GetState(void) = 0;
31 virtual void Reset(void) = 0;
32 virtual float GetConfidence(void) = 0;
33
34#ifdef DEBUG_PROBE
35 void DumpStatus() override
36 {
37 }
38#endif
39
40 // Helper functions used in the Latin1 and Group probers.
41 // both functions Allocate a new buffer for newBuf. This buffer should be
42 // freed by the caller using PR_FREEIF.
43 // Both functions return false in case of memory allocation failure.
44 static bool FilterWithoutEnglishLetters(const char *aBuf, unsigned int aLen, char **newBuf, unsigned int &newLen);
45 static bool FilterWithEnglishLetters(const char *aBuf, unsigned int aLen, char **newBuf, unsigned int &newLen);
46};
47}
48#endif /* nsCharSetProber_h__ */
49

source code of kcodecs/src/probers/nsCharSetProber.h