src/html/search.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        search.cpp
   3 // Purpose:     search engine
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/defs.h"
  19 #if wxUSE_HTML
  20
  21 #ifdef __BORDLANDC__
  22 #pragma hdrstop
  23 #endif
  24
  25 #ifndef WXPRECOMP
  26 #endif
  27
  28 #include "wx/html/helpdata.h"
  29
  30
  31 //--------------------------------------------------------------------------------
  32 // wxSearchEngine
  33 //--------------------------------------------------------------------------------
  34
  35 void wxSearchEngine::LookFor(const wxString& keyword)
  36 {
  37     if (m_Keyword) delete[] m_Keyword;
  38     m_Keyword = new wxChar[keyword.Length() + 1];
  39     wxStrcpy(m_Keyword, keyword.c_str());
  40     for (int i = wxStrlen(m_Keyword) - 1; i >= 0; i--)
  41         if ((m_Keyword[i] >= wxT('A')) && (m_Keyword[i] <= wxT('Z')))
  42             m_Keyword[i] += wxT('a') - wxT('A');
  43 }
  44
  45
  46
  47 bool wxSearchEngine::Scan(wxInputStream *stream)
  48 {
  49     wxASSERT_MSG(m_Keyword != NULL, _("wxSearchEngine::LookFor must be called before scanning!"));
  50
  51     int i, j;
  52     int lng = stream ->GetSize();
  53     int wrd = wxStrlen(m_Keyword);
  54     bool found = FALSE;
  55     char *buf = new char[lng + 1];
  56     stream -> Read(buf, lng);
  57     buf[lng] = 0;
  58
  59     for (i = 0; i < lng; i++)
  60         if ((buf[i] >= 'A') && (buf[i] <= 'Z')) buf[i] += 'a' - 'A';
  61
  62     for (i = 0; i < lng - wrd; i++) {
  63         j = 0;
  64         while ((j < wrd) && (buf[i + j] == m_Keyword[j])) j++;
  65         if (j == wrd) {found = TRUE; break;}
  66     }
  67
  68     delete[] buf;
  69     return found;
  70 }
  71
  72 #endif