Correct harmless typos.

[wxWidgets.git] / src / common / tokenzr.cpp

diff --git a/src/common/tokenzr.cpp b/src/common/tokenzr.cpp
index 0601d5d0e5f762c9d84624ab38d2713923f1a0d3..43641b726eec146a4b0965cb29f90c2d1a00cd73 100644 (file)
--- a/src/common/tokenzr.cpp
+++ b/src/common/tokenzr.cpp
@@ -2,7 +2,7 @@
 // Name:        tokenzr.cpp
 // Purpose:     String tokenizer
 // Author:      Guilhem Lavaux
 // Name:        tokenzr.cpp
 // Purpose:     String tokenizer
 // Author:      Guilhem Lavaux

-// Modified by: Vadim Zeitlin
+// Modified by: Vadim Zeitlin (almost full rewrite)

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


@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

     #pragma implementation "tokenzr.h"
 #endif
 
     #pragma implementation "tokenzr.h"
 #endif
 


@@ -29,6 +29,10 @@
 #endif
 
 #include "wx/tokenzr.h"
 #endif
 
 #include "wx/tokenzr.h"

+#include "wx/arrstr.h"
+
+// Required for wxIs... functions
+#include <ctype.h>

 
 // ============================================================================
 // implementation
 
 // ============================================================================
 // implementation


@@ -38,57 +42,111 @@
 // wxStringTokenizer construction
 // ----------------------------------------------------------------------------
 
 // wxStringTokenizer construction
 // ----------------------------------------------------------------------------
 

-wxStringTokenizer::wxStringTokenizer(const wxString& to_tokenize,
+wxStringTokenizer::wxStringTokenizer(const wxString& str,

                                      const wxString& delims,
                                      const wxString& delims,

-                                     bool ret_delims)
+                                     wxStringTokenizerMode mode)

 {
 {

-    SetString(to_tokenize, delims, ret_delims);
+    SetString(str, delims, mode);

 }
 
 }
 

-void wxStringTokenizer::SetString(const wxString& to_tokenize,
+void wxStringTokenizer::SetString(const wxString& str,

                                   const wxString& delims,
                                   const wxString& delims,

-                                  bool ret_delim)
+                                  wxStringTokenizerMode mode)

 {
 {

-    m_string = to_tokenize;
+    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)
+        const wxChar *p;
+        for ( p = delims.c_str(); *p; p++ )
+        {
+            if ( !wxIsspace(*p) )
+                break;
+        }
+
+        if ( *p )
+        {
+            // not whitespace char in delims
+            mode = wxTOKEN_RET_EMPTY;
+        }
+        else
+        {
+            // only whitespaces
+            mode = wxTOKEN_STRTOK;
+        }
+    }
+

     m_delims = delims;
     m_delims = delims;

-    m_retdelims = ret_delim;
-    m_pos = 0;
+    m_mode = mode;

 
 

-    // empty string doesn't have any tokens
-    m_hasMore = !m_string.empty();
+    Reinit(str);

 }
 
 }
 

-wxStringTokenizer::~wxStringTokenizer()
+void wxStringTokenizer::Reinit(const wxString& str)

 {
 {

+    wxASSERT_MSG( IsOk(), _T("you should call SetString() first") );
+
+    m_string = str;
+    m_pos = 0;
+
+    // empty string doesn't have any tokens
+    m_hasMore = !m_string.empty();

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------

-// count the number of tokens in the string
+// access to the tokens

 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 

-size_t wxStringTokenizer::CountTokens() const
+// do we have more of them?
+bool wxStringTokenizer::HasMoreTokens() const

 {
 {

-    size_t pos = 0;
-    size_t count = 0;
-    for ( ;; )
+    wxCHECK_MSG( IsOk(), false, _T("you should call SetString() first") );
+
+    if ( m_string.find_first_not_of(m_delims) == wxString::npos )

     {
     {

-        pos = m_string.find_first_of(m_delims, pos);
-        if ( pos == wxString::npos )
-            break;
+        // no non empty tokens left, but in 2 cases we still may return true if
+        // GetNextToken() wasn't called yet for this empty token:
+        //
+        //   a) in wxTOKEN_RET_EMPTY_ALL mode we always do it
+        //   b) in wxTOKEN_RET_EMPTY mode we do it in the special case of a
+        //      string containing only the delimiter: then there is an empty
+        //      token just before it
+        return (m_mode == wxTOKEN_RET_EMPTY_ALL) ||
+               (m_mode == wxTOKEN_RET_EMPTY && m_pos == 0)
+                    ? m_hasMore : false;
+    }
+    else
+    {
+        // there are non delimiter characters left, hence we do have more
+        // tokens
+        return true;
+    }
+}

 
 

-        count++;    // one more token found
+// count the number of tokens in the string
+size_t wxStringTokenizer::CountTokens() const
+{
+    wxCHECK_MSG( IsOk(), 0, _T("you should call SetString() first") );

 
 

-        pos++;      // skip delimiter
-    }
+    // VZ: this function is IMHO not very useful, so it's probably not very
+    //     important if it's 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 *self = (wxStringTokenizer *)this;    // const_cast
+    wxString stringInitial = m_string;

 
 

-    // normally, we didn't count the last token in the loop above - so add it
-    // unless the string was empty from the very beginning, in which case it
-    // still has 0 (and not 1) tokens
-    if ( !m_string.empty() )
+    size_t count = 0;
+    while ( self->HasMoreTokens() )

     {
         count++;
     {
         count++;

+
+        (void)self->GetNextToken();

     }
 
     }
 

+    self->Reinit(stringInitial);
+

     return count;
 }
 
     return count;
 }
 


@@ -98,33 +156,68 @@ size_t wxStringTokenizer::CountTokens() const
 
 wxString wxStringTokenizer::GetNextToken()
 {
 
 wxString wxStringTokenizer::GetNextToken()
 {

+    // strtok() doesn't return empty tokens, all other modes do
+    bool allowEmpty = m_mode != wxTOKEN_STRTOK;
+

     wxString token;
     wxString token;

-    if ( HasMoreTokens() )
+    do

     {
     {

-        size_t pos = m_string.find_first_of(m_delims); // end of token
-        size_t pos2;                                   // start of the next one
-        if ( pos != wxString::npos )
+        if ( !HasMoreTokens() )

         {
         {

-            // return the delimiter too
-            pos2 = pos + 1;
+            break;

         }
         }

-        else
+        // find the end of this token
+        size_t pos = m_string.find_first_of(m_delims);
+
+        // and the start of the next one
+        if ( pos == wxString::npos )

         {
         {

-            pos2 = m_string.length();
+            // no more delimiters, the token is everything till the end of
+            // string
+            token = m_string;

 
 

-            // no more tokens in this string
-            m_hasMore = FALSE;
+            m_pos += m_string.length();
+            m_string.clear();
+
+            // no more tokens in this string, even in wxTOKEN_RET_EMPTY_ALL
+            // mode (we will return the trailing one right now in this case)
+            m_hasMore = false;

         }
         }

+        else
+        {
+            size_t pos2 = pos + 1;

 
 

-        token = wxString(m_string, m_retdelims ? pos2 : pos);
+            // in wxTOKEN_RET_DELIMS mode we return the delimiter character
+            // with token
+            token = wxString(m_string, m_mode == wxTOKEN_RET_DELIMS ? pos2
+                                                                    : pos);

 
 

-        // remove token with the following it delimiter from string
-        m_string.erase(0, pos2);
+            // remove token with the following it delimiter from string
+            m_string.erase(0, pos2);

 
 

-        // keep track of the position in the original string too
-        m_pos += pos2;
+            // keep track of the position in the original string too
+            m_pos += pos2;
+        }

     }
     }

-    //else: no more tokens, return empty token
+    while ( !allowEmpty && token.empty() );

 
     return token;
 }
 
     return token;
 }

+
+// ----------------------------------------------------------------------------
+// public functions
+// ----------------------------------------------------------------------------
+
+wxArrayString wxStringTokenize(const wxString& str,
+                               const wxString& delims,
+                               wxStringTokenizerMode mode)
+{
+    wxArrayString tokens;
+    wxStringTokenizer tk(str, delims, mode);
+    while ( tk.HasMoreTokens() )
+    {
+        tokens.Add(tk.GetNextToken());
+    }
+
+    return tokens;
+}