remove warnings of intentionally unreachable code

[wxWidgets.git] / include / wx / tokenzr.h

diff --git a/include/wx/tokenzr.h b/include/wx/tokenzr.h
index 764b4c80919e854b4bd252b376eb51946009fc9f..d47d52c324fdfd144dce6805a0dbc61033ed6286 100644 (file)
--- a/include/wx/tokenzr.h
+++ b/include/wx/tokenzr.h
@@ -1,8 +1,8 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        tokenzr.h
-// Purpose:     String tokenizer
+// Name:        wx/tokenzr.h
+// Purpose:     String tokenizer - a C++ replacement for strtok(3)

 // Author:      Guilhem Lavaux
 // Author:      Guilhem Lavaux

-// Modified by:
+// Modified by: (or rather rewritten by) Vadim Zeitlin

 // Created:     04/22/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux
 // Created:     04/22/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Guilhem Lavaux


@@ -12,44 +12,124 @@
 #ifndef _WX_TOKENZRH
 #define _WX_TOKENZRH
 
 #ifndef _WX_TOKENZRH
 #define _WX_TOKENZRH
 

-#ifdef __GNUG__
-#pragma interface
-#endif
-

 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/object.h"
 #include "wx/string.h"

-#include "wx/filefn.h"
+#include "wx/arrstr.h"
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+// default: delimiters are usual white space characters
+#define wxDEFAULT_DELIMITERS (_T(" \t\r\n"))
+
+// wxStringTokenizer mode flags which determine its behaviour
+enum wxStringTokenizerMode
+{
+    wxTOKEN_INVALID = -1,   // set by def ctor until SetString() is called
+    wxTOKEN_DEFAULT,        // strtok() for whitespace delims, RET_EMPTY else
+    wxTOKEN_RET_EMPTY,      // return empty token in the middle of the string
+    wxTOKEN_RET_EMPTY_ALL,  // return trailing empty tokens too
+    wxTOKEN_RET_DELIMS,     // return the delim with token (implies RET_EMPTY)
+    wxTOKEN_STRTOK          // behave exactly like strtok(3)
+};
+
+// ----------------------------------------------------------------------------
+// wxStringTokenizer: replaces infamous strtok() and has some other features
+// ----------------------------------------------------------------------------

 
 

-class wxStringTokenizer : public wxObject {
+class WXDLLIMPEXP_BASE wxStringTokenizer : public wxObject
+{

 public:
 public:

-  wxStringTokenizer(const wxString& to_tokenize,
-                    const wxString& delims = " \t\r\n",
-                    bool ret_delim = FALSE);
-  wxStringTokenizer() {  m_string = "";  m_delims = "";  m_retdelims = FALSE;}
-  ~wxStringTokenizer();
-
-  int CountTokens();
-  bool HasMoreToken();
-  inline bool HasMoreTokens() { return HasMoreToken(); };
-  wxString NextToken();
-  // A better name!
-  inline wxString GetNextToken() { return NextToken(); };
-  wxString GetString() { return m_string; }
-
-  void SetString(const wxString& to_tokenize,
-                    const wxString& delims = " \t\r\n",
-                    bool ret_delim = FALSE)
-  {
-    m_string = to_tokenize;
-    m_delims = delims;
-    m_retdelims = ret_delim;
-  }
+    // ctors and initializers
+        // default ctor, call SetString() later
+    wxStringTokenizer() { m_mode = wxTOKEN_INVALID; }
+        // ctor which gives us the string
+    wxStringTokenizer(const wxString& str,
+                      const wxString& delims = wxDEFAULT_DELIMITERS,
+                      wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
+
+        // args are same as for the non default ctor above
+    void SetString(const wxString& str,
+                   const wxString& delims = wxDEFAULT_DELIMITERS,
+                   wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
+
+        // reinitialize the tokenizer with the same delimiters/mode
+    void Reinit(const wxString& str);
+
+    // tokens access
+        // return the number of remaining tokens
+    size_t CountTokens() const;
+        // did we reach the end of the string?
+    bool HasMoreTokens() const;
+        // get the next token, will return empty string if !HasMoreTokens()
+    wxString GetNextToken();
+        // get the delimiter which terminated the token last retrieved by
+        // GetNextToken() or NUL if there had been no tokens yet or the last
+        // one wasn't terminated (but ran to the end of the string)
+    wxChar GetLastDelimiter() const { return m_lastDelim; }
+
+    // get current tokenizer state
+        // returns the part of the string which remains to tokenize (*not* the
+        // initial string)
+    wxString GetString() const { return m_string.substr(m_pos); }
+
+        // returns the current position (i.e. one index after the last
+        // returned token or 0 if GetNextToken() has never been called) in the
+        // original string
+    size_t GetPosition() const { return m_pos; }
+
+    // misc
+        // get the current mode - can be different from the one passed to the
+        // ctor if it was wxTOKEN_DEFAULT
+    wxStringTokenizerMode GetMode() const { return m_mode; }
+        // do we return empty tokens?
+    bool AllowEmpty() const { return m_mode != wxTOKEN_STRTOK; }
+
+
+    // backwards compatibility section from now on
+    // -------------------------------------------
+
+    // for compatibility only, use GetNextToken() instead
+    wxString NextToken() { return GetNextToken(); }
+
+    // compatibility only, don't use
+    void SetString(const wxString& to_tokenize,
+                   const wxString& delims,
+                   bool WXUNUSED(ret_delim))
+    {
+        SetString(to_tokenize, delims, wxTOKEN_RET_DELIMS);
+    }
+
+    wxStringTokenizer(const wxString& to_tokenize,
+                      const wxString& delims,
+                      bool ret_delim)
+    {
+        SetString(to_tokenize, delims, ret_delim);
+    }

 
 protected:
 
 protected:

-  off_t FindDelims(const wxString& str, const wxString& delims);
-protected:
-  wxString m_string, m_delims;
-  bool m_retdelims;
+    bool IsOk() const { return m_mode != wxTOKEN_INVALID; }
+
+    wxString m_string,              // the string we tokenize
+             m_delims;              // all possible delimiters
+
+    size_t   m_pos;                 // the current position in m_string
+
+    wxStringTokenizerMode m_mode;   // see wxTOKEN_XXX values
+
+    wxChar   m_lastDelim;           // delimiter after last token or '\0'

 };
 
 };
 

-#endif
+// ----------------------------------------------------------------------------
+// convenience function which returns all tokens at once
+// ----------------------------------------------------------------------------
+
+// the function takes the same parameters as wxStringTokenizer ctor and returns
+// the array containing all tokens
+wxArrayString WXDLLIMPEXP_BASE
+wxStringTokenize(const wxString& str,
+                 const wxString& delims = wxDEFAULT_DELIMITERS,
+                 wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
+
+#endif // _WX_TOKENZRH