src/common/tokenzr.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        tokenzr.cpp
   3 // Purpose:     String tokenizer
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     04/22/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "tokenzr.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #include "wx/tokenzr.h"
  24
  25 wxStringTokenizer::wxStringTokenizer(const wxString& to_tokenize,
  26                                      const wxString& delims,
  27                                      bool ret_delims)
  28 {
  29     m_string = to_tokenize;
  30     m_delims = delims;
  31     m_retdelims = ret_delims;
  32 }
  33
  34 wxStringTokenizer::~wxStringTokenizer()
  35 {
  36 }
  37
  38 off_t wxStringTokenizer::FindDelims(const wxString& str, const wxString& delims) const
  39 {
  40     for ( size_t i = 0; i < str.Length(); i++ )
  41     {
  42         char c = str[i];
  43
  44         for ( size_t j = 0; j < delims.Length() ; j++ )
  45         {
  46             if ( delims[j] == c )
  47                 return i;
  48         }
  49     }
  50
  51     return -1;
  52 }
  53
  54 int wxStringTokenizer::CountTokens() const
  55 {
  56     wxString p_string = m_string;
  57     bool found = TRUE;
  58     int pos, count = 1;
  59
  60     if (p_string.Length() == 0)
  61         return 0;
  62
  63     while (found)
  64     {
  65         pos = FindDelims(p_string, m_delims);
  66         if (pos != -1)
  67         {
  68             count++;
  69             p_string = p_string(0, pos);
  70         }
  71         else
  72         {
  73             found = FALSE;
  74         }
  75     }
  76
  77     return count;
  78 }
  79
  80 bool wxStringTokenizer::HasMoreTokens()
  81 {
  82     return !m_string.IsEmpty();
  83 }
  84
  85 // needed to fix leading whitespace / mult. delims bugs
  86 void wxStringTokenizer::EatLeadingDelims()
  87 {
  88     int pos;
  89
  90     // while leading delims trim 'em from the left
  91     while ( ( pos = FindDelims(m_string, m_delims)) == 0 )
  92     {
  93         m_string = m_string.Mid((size_t)1);
  94     }
  95 }
  96
  97 wxString wxStringTokenizer::NextToken()
  98 {
  99     off_t pos, pos2;
 100     wxString r_string;
 101
 102     if ( m_string.IsEmpty() )
 103         return m_string;
 104
 105     if ( !m_retdelims )
 106         EatLeadingDelims();
 107
 108     pos = FindDelims(m_string, m_delims);
 109     if (pos == -1)
 110     {
 111         r_string = m_string;
 112         m_string = wxEmptyString;
 113
 114         return r_string;
 115     }
 116
 117     if (m_retdelims)
 118     {
 119         if (!pos)
 120         {
 121             pos++;
 122             pos2 = 1;
 123         }
 124         else
 125         {
 126             pos2 = pos;
 127         }
 128     }
 129     else
 130     {
 131         pos2 = pos + 1;
 132     }
 133
 134     r_string = m_string.Left((size_t)pos);
 135     m_string = m_string.Mid((size_t)pos2);
 136
 137     return r_string;
 138 }