/////////////////////////////////////////////////////////////////////////////
-// Name: tokenzr.cpp
+// Name: src/common/tokenzr.cpp
// Purpose: String tokenizer
// Author: Guilhem Lavaux
-// Modified by:
+// Modified by: Vadim Zeitlin (almost full rewrite)
// Created: 04/22/98
// RCS-ID: $Id$
// Copyright: (c) Guilhem Lavaux
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "tokenzr.h"
-#endif
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
+#include "wx/tokenzr.h"
+
#ifndef WX_PRECOMP
+ #include "wx/arrstr.h"
+ #include "wx/crt.h"
#endif
-#include "wx/object.h"
-#include "wx/string.h"
-#include "wx/tokenzr.h"
+// Required for wxIs... functions
+#include <ctype.h>
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// helpers
+// ----------------------------------------------------------------------------
-wxStringTokenizer::wxStringTokenizer(const wxString& to_tokenize,
+static wxString::const_iterator
+find_first_of(const wxChar *delims, size_t len,
+ const wxString::const_iterator& from,
+ const wxString::const_iterator& end)
+{
+ wxASSERT_MSG( from <= end, _T("invalid index") );
+
+ for ( wxString::const_iterator i = from; i != end; ++i )
+ {
+ if ( wxTmemchr(delims, *i, len) )
+ return i;
+ }
+
+ return end;
+}
+
+static wxString::const_iterator
+find_first_not_of(const wxChar *delims, size_t len,
+ const wxString::const_iterator& from,
+ const wxString::const_iterator& end)
+{
+ wxASSERT_MSG( from <= end, _T("invalid index") );
+
+ for ( wxString::const_iterator i = from; i != end; ++i )
+ {
+ if ( !wxTmemchr(delims, *i, len) )
+ return i;
+ }
+
+ return end;
+}
+
+// ----------------------------------------------------------------------------
+// wxStringTokenizer construction
+// ----------------------------------------------------------------------------
+
+wxStringTokenizer::wxStringTokenizer(const wxString& str,
const wxString& delims,
- bool ret_delims)
- : wxObject()
+ wxStringTokenizerMode mode)
{
- m_string = to_tokenize;
- m_delims = delims;
- m_retdelims = ret_delims;
+ SetString(str, delims, mode);
}
-wxStringTokenizer::~wxStringTokenizer()
+void wxStringTokenizer::SetString(const wxString& str,
+ const wxString& delims,
+ wxStringTokenizerMode mode)
{
+ if ( mode == wxTOKEN_DEFAULT )
+ {
+ // by default, we behave like strtok() if the delimiters are only
+ // whitespace characters and as wxTOKEN_RET_EMPTY otherwise (for
+ // whitespace delimiters, strtok() behaviour is better because we want
+ // to count consecutive spaces as one delimiter)
+ wxString::const_iterator p;
+ for ( p = delims.begin(); p != delims.end(); ++p )
+ {
+ if ( !wxIsspace(*p) )
+ break;
+ }
+
+ if ( p != delims.end() )
+ {
+ // not whitespace char in delims
+ mode = wxTOKEN_RET_EMPTY;
+ }
+ else
+ {
+ // only whitespaces
+ mode = wxTOKEN_STRTOK;
+ }
+ }
+
+#if wxUSE_UNICODE // FIXME-UTF8: only wc_str()
+ m_delims = delims.wc_str();
+#else
+ m_delims = delims.mb_str();
+#endif
+ m_delimsLen = delims.length();
+
+ m_mode = mode;
+
+ Reinit(str);
}
-off_t wxStringTokenizer::FindDelims(const wxString& str, const wxString& delims)
+void wxStringTokenizer::Reinit(const wxString& str)
{
- int i, j;
- register int s_len = str.Length(),
- len = delims.Length();
-
- for (i=0;i<s_len;i++) {
- register char c = str[i];
-
- for (j=0;j<len;j++)
- if (delims[j] == c)
- return i;
- }
- return -1;
+ wxASSERT_MSG( IsOk(), _T("you should call SetString() first") );
+
+ m_string = str;
+ m_stringEnd = m_string.end();
+ m_pos = m_string.begin();
+ m_lastDelim = _T('\0');
+ m_hasMoreTokens = MoreTokens_Unknown;
}
-int wxStringTokenizer::CountTokens()
+// ----------------------------------------------------------------------------
+// access to the tokens
+// ----------------------------------------------------------------------------
+
+// do we have more of them?
+bool wxStringTokenizer::HasMoreTokens() const
{
- wxString p_string = m_string;
- bool found = TRUE;
- int pos, count = 1;
-
- if (p_string.Length() == 0)
- return 0;
-
- while (found) {
- pos = FindDelims(p_string, m_delims);
- if (pos != -1) {
- count++;
- p_string = p_string(0, pos);
- } else
- found = FALSE;
- }
- return count;
+ // GetNextToken() calls HasMoreTokens() and so HasMoreTokens() is called
+ // twice in every interation in the following common usage patten:
+ // while ( HasMoreTokens() )
+ // GetNextToken();
+ // We optimize this case by caching HasMoreTokens() return value here:
+ if ( m_hasMoreTokens == MoreTokens_Unknown )
+ {
+ bool r = DoHasMoreTokens();
+ wxConstCast(this, wxStringTokenizer)->m_hasMoreTokens =
+ r ? MoreTokens_Yes : MoreTokens_No;
+ return r;
+ }
+ else
+ return m_hasMoreTokens == MoreTokens_Yes;
}
-bool wxStringTokenizer::HasMoreToken()
+bool wxStringTokenizer::DoHasMoreTokens() const
{
- return (m_string.Length() != 0);
+ wxCHECK_MSG( IsOk(), false, _T("you should call SetString() first") );
+
+ if ( find_first_not_of(m_delims, m_delimsLen, m_pos, m_stringEnd)
+ != m_stringEnd )
+ {
+ // there are non delimiter characters left, so we do have more tokens
+ return true;
+ }
+
+ switch ( m_mode )
+ {
+ case wxTOKEN_RET_EMPTY:
+ case wxTOKEN_RET_DELIMS:
+ // special hack for wxTOKEN_RET_EMPTY: we should return the initial
+ // empty token even if there are only delimiters after it
+ return !m_string.empty() && m_pos == m_string.begin();
+
+ case wxTOKEN_RET_EMPTY_ALL:
+ // special hack for wxTOKEN_RET_EMPTY_ALL: we can know if we had
+ // already returned the trailing empty token after the last
+ // delimiter by examining m_lastDelim: it is set to NUL if we run
+ // up to the end of the string in GetNextToken(), but if it is not
+ // NUL yet we still have this last token to return even if m_pos is
+ // already at m_string.length()
+ return m_pos < m_stringEnd || m_lastDelim != _T('\0');
+
+ case wxTOKEN_INVALID:
+ case wxTOKEN_DEFAULT:
+ wxFAIL_MSG( _T("unexpected tokenizer mode") );
+ // fall through
+
+ case wxTOKEN_STRTOK:
+ // never return empty delimiters
+ break;
+ }
+
+ return false;
+}
+
+// count the number of (remaining) tokens in the string
+size_t wxStringTokenizer::CountTokens() const
+{
+ wxCHECK_MSG( IsOk(), 0, _T("you should call SetString() first") );
+
+ // VZ: this function is IMHO not very useful, so it's probably not very
+ // important if its implementation here is not as efficient as it
+ // could be -- but OTOH like this we're sure to get the correct answer
+ // in all modes
+ wxStringTokenizer tkz(wxString(m_pos, m_stringEnd), m_delims, m_mode);
+
+ size_t count = 0;
+ while ( tkz.HasMoreTokens() )
+ {
+ count++;
+
+ (void)tkz.GetNextToken();
+ }
+
+ return count;
}
-// AVS - added to fix leading whitespace / mult. delims bugs
-void wxStringTokenizer::EatLeadingDelims()
+// ----------------------------------------------------------------------------
+// token extraction
+// ----------------------------------------------------------------------------
+
+wxString wxStringTokenizer::GetNextToken()
{
- int pos;
+ wxString token;
+ do
+ {
+ if ( !HasMoreTokens() )
+ {
+ break;
+ }
+
+ m_hasMoreTokens = MoreTokens_Unknown;
+
+ // find the end of this token
+ wxString::const_iterator pos =
+ find_first_of(m_delims, m_delimsLen, m_pos, m_stringEnd);
+
+ // and the start of the next one
+ if ( pos == m_stringEnd )
+ {
+ // no more delimiters, the token is everything till the end of
+ // string
+ token.assign(m_pos, m_stringEnd);
+
+ // skip the token
+ m_pos = m_stringEnd;
- while ((pos=FindDelims(m_string, m_delims))==0) { // while leading delims
- m_string = m_string.Mid((size_t)1); // trim 'em from the left
- }
+ // it wasn't terminated
+ m_lastDelim = _T('\0');
+ }
+ else // we found a delimiter at pos
+ {
+ // in wxTOKEN_RET_DELIMS mode we return the delimiter character
+ // with token, otherwise leave it out
+ wxString::const_iterator tokenEnd(pos);
+ if ( m_mode == wxTOKEN_RET_DELIMS )
+ ++tokenEnd;
+
+ token.assign(m_pos, tokenEnd);
+
+ // skip the token and the trailing delimiter
+ m_pos = pos + 1;
+
+ m_lastDelim = (pos == m_stringEnd) ? _T('\0') : (wxChar)*pos;
+ }
+ }
+ while ( !AllowEmpty() && token.empty() );
+
+ return token;
}
-wxString wxStringTokenizer::NextToken()
+// ----------------------------------------------------------------------------
+// public functions
+// ----------------------------------------------------------------------------
+
+wxArrayString wxStringTokenize(const wxString& str,
+ const wxString& delims,
+ wxStringTokenizerMode mode)
{
- register off_t pos, pos2;
- wxString r_string;
-
- if (m_string.IsNull())
- return m_string;
-
- if (!m_retdelims)
- EatLeadingDelims(); // AVS - added to fix leading whitespace /
- // mult. delims bugs
-
- pos = FindDelims(m_string, m_delims);
- if (pos == -1) {
- r_string = m_string;
- m_string = wxEmptyString;
-
- return r_string;
- }
-
- if (m_retdelims) {
- if (!pos) {
- pos++;
- pos2 = 1;
- } else
- pos2 = pos;
- } else
- pos2 = pos + 1;
-
- r_string = m_string.Left((size_t)pos);
- m_string = m_string.Mid((size_t)pos2);
-
- return r_string;
+ wxArrayString tokens;
+ wxStringTokenizer tk(str, delims, mode);
+ while ( tk.HasMoreTokens() )
+ {
+ tokens.Add(tk.GetNextToken());
+ }
+
+ return tokens;
}
projects / wxWidgets.git / blobdiff