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135
wxWidgets/include/wx/tokenzr.h
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135
wxWidgets/include/wx/tokenzr.h
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/tokenzr.h
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// Purpose: String tokenizer - a C++ replacement for strtok(3)
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// Author: Guilhem Lavaux
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// Modified by: (or rather rewritten by) Vadim Zeitlin
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// Created: 04/22/98
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// RCS-ID: $Id: tokenzr.h 61872 2009-09-09 22:37:05Z VZ $
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TOKENZRH
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#define _WX_TOKENZRH
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#include "wx/object.h"
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#include "wx/string.h"
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#include "wx/arrstr.h"
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// default: delimiters are usual white space characters
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#define wxDEFAULT_DELIMITERS (wxT(" \t\r\n"))
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// wxStringTokenizer mode flags which determine its behaviour
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enum wxStringTokenizerMode
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{
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wxTOKEN_INVALID = -1, // set by def ctor until SetString() is called
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wxTOKEN_DEFAULT, // strtok() for whitespace delims, RET_EMPTY else
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wxTOKEN_RET_EMPTY, // return empty token in the middle of the string
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wxTOKEN_RET_EMPTY_ALL, // return trailing empty tokens too
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wxTOKEN_RET_DELIMS, // return the delim with token (implies RET_EMPTY)
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wxTOKEN_STRTOK // behave exactly like strtok(3)
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};
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// ----------------------------------------------------------------------------
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// wxStringTokenizer: replaces infamous strtok() and has some other features
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxStringTokenizer : public wxObject
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{
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public:
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// ctors and initializers
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// default ctor, call SetString() later
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wxStringTokenizer() { m_mode = wxTOKEN_INVALID; }
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// ctor which gives us the string
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wxStringTokenizer(const wxString& str,
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const wxString& delims = wxDEFAULT_DELIMITERS,
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wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
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// args are same as for the non default ctor above
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void SetString(const wxString& str,
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const wxString& delims = wxDEFAULT_DELIMITERS,
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wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
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// reinitialize the tokenizer with the same delimiters/mode
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void Reinit(const wxString& str);
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// tokens access
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// return the number of remaining tokens
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size_t CountTokens() const;
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// did we reach the end of the string?
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bool HasMoreTokens() const;
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// get the next token, will return empty string if !HasMoreTokens()
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wxString GetNextToken();
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// get the delimiter which terminated the token last retrieved by
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// GetNextToken() or NUL if there had been no tokens yet or the last
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// one wasn't terminated (but ran to the end of the string)
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wxChar GetLastDelimiter() const { return m_lastDelim; }
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// get current tokenizer state
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// returns the part of the string which remains to tokenize (*not* the
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// initial string)
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wxString GetString() const { return m_string.substr(m_pos); }
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// returns the current position (i.e. one index after the last
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// returned token or 0 if GetNextToken() has never been called) in the
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// original string
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size_t GetPosition() const { return m_pos; }
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// misc
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// get the current mode - can be different from the one passed to the
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// ctor if it was wxTOKEN_DEFAULT
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wxStringTokenizerMode GetMode() const { return m_mode; }
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// do we return empty tokens?
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bool AllowEmpty() const { return m_mode != wxTOKEN_STRTOK; }
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// backwards compatibility section from now on
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// -------------------------------------------
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// for compatibility only, use GetNextToken() instead
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wxString NextToken() { return GetNextToken(); }
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// compatibility only, don't use
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void SetString(const wxString& to_tokenize,
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const wxString& delims,
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bool WXUNUSED(ret_delim))
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{
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SetString(to_tokenize, delims, wxTOKEN_RET_DELIMS);
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}
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wxStringTokenizer(const wxString& to_tokenize,
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const wxString& delims,
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bool ret_delim)
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{
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SetString(to_tokenize, delims, ret_delim);
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}
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protected:
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bool IsOk() const { return m_mode != wxTOKEN_INVALID; }
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wxString m_string, // the string we tokenize
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m_delims; // all possible delimiters
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size_t m_pos; // the current position in m_string
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wxStringTokenizerMode m_mode; // see wxTOKEN_XXX values
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wxChar m_lastDelim; // delimiter after last token or '\0'
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};
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// ----------------------------------------------------------------------------
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// convenience function which returns all tokens at once
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// ----------------------------------------------------------------------------
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// the function takes the same parameters as wxStringTokenizer ctor and returns
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// the array containing all tokens
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wxArrayString WXDLLIMPEXP_BASE
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wxStringTokenize(const wxString& str,
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const wxString& delims = wxDEFAULT_DELIMITERS,
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wxStringTokenizerMode mode = wxTOKEN_DEFAULT);
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#endif // _WX_TOKENZRH
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