src/html/search.cpp

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