X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ad813b00d5956f35f2b1585a276095e24ce8ad5a..f6669958924c3c3833e2932b65598b06073d2e65:/include/wx/tokenzr.h diff --git a/include/wx/tokenzr.h b/include/wx/tokenzr.h index 764b4c8091..0708ebff13 100644 --- 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 -// Modified by: +// Modified by: (or rather rewritten by) Vadim Zeitlin // Created: 04/22/98 // RCS-ID: $Id$ // Copyright: (c) Guilhem Lavaux @@ -12,44 +12,138 @@ #ifndef _WX_TOKENZRH #define _WX_TOKENZRH -#ifdef __GNUG__ -#pragma interface -#endif - #include "wx/object.h" #include "wx/string.h" -#include "wx/filefn.h" +#include "wx/arrstr.h" + +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- -class wxStringTokenizer : public wxObject { +// default: delimiters are usual white space characters +#define wxDEFAULT_DELIMITERS (wxT(" \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 WXDLLIMPEXP_BASE wxStringTokenizer : public wxObject +{ 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 wxString(m_pos, m_string.end()); } + + // 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 - m_string.begin(); } + + // 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: - 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; } + + bool DoHasMoreTokens() const; + + enum MoreTokensState + { + MoreTokens_Unknown, + MoreTokens_Yes, + MoreTokens_No + }; + + MoreTokensState m_hasMoreTokens; + + wxString m_string; // the string we tokenize + wxString::const_iterator m_stringEnd; + // FIXME-UTF8: use wxWcharBuffer + wxWxCharBuffer m_delims; // all possible delimiters + size_t m_delimsLen; + + wxString::const_iterator 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