1 files changed, 42 insertions, 0 deletions
diff --git a/extensions/universalchardet/src/base/nsCharSetProber.h b/extensions/universalchardet/src/base/nsCharSetProber.h
new file mode 100644
index 0000000000..4cb12794f2
--- /dev/null
+++ b/extensions/universalchardet/src/base/nsCharSetProber.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef nsCharSetProber_h__
+#define nsCharSetProber_h__
+
+#include "nscore.h"
+
+//#define DEBUG_chardet // Uncomment this for debug dump.
+
+typedef enum {
+  eDetecting = 0,   //We are still detecting, no sure answer yet, but caller can ask for confidence.
+  eFoundIt = 1,     //That's a positive answer
+  eNotMe = 2        //Negative answer
+} nsProbingState;
+
+#define SHORTCUT_THRESHOLD      (float)0.95
+
+class nsCharSetProber {
+public:
+  virtual ~nsCharSetProber() {}
+  virtual const char* GetCharSetName() = 0;
+  virtual nsProbingState HandleData(const char* aBuf, uint32_t aLen) = 0;
+  virtual nsProbingState GetState(void) = 0;
+  virtual void      Reset(void)  = 0;
+  virtual float     GetConfidence(void) = 0;
+
+#ifdef DEBUG_chardet
+  virtual void  DumpStatus() {};
+#endif
+
+  // Helper functions used in the Latin1 and Group probers.
+  // both functions Allocate a new buffer for newBuf. This buffer should be 
+  // freed by the caller using PR_FREEIF.
+  // Both functions return false in case of memory allocation failure.
+  static bool FilterWithoutEnglishLetters(const char* aBuf, uint32_t aLen, char** newBuf, uint32_t& newLen);
+  static bool FilterWithEnglishLetters(const char* aBuf, uint32_t aLen, char** newBuf, uint32_t& newLen);
+
+};
+
+#endif /* nsCharSetProber_h__ */