contrib/src/xml/xmlbin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xmlbin.cpp
   3 // Purpose:     wxXmlIOHandlerBin
   4 // Author:      Vaclav Slavik
   5 // Created:     2000/07/24
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2000 Vaclav Slavik
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifdef __GNUG__
  12 // nothing, already in xml.cpp
  13 #endif
  14
  15 // For compilers that support precompilation, includes "wx.h".
  16 #include "wx/wxprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #include "wx/datstrm.h"
  23 #include "wx/log.h"
  24 #include "wx/intl.h"
  25
  26 #include "wx/xml/xmlio.h"
  27
  28
  29
  30
  31 bool wxXmlIOHandlerBin::CanLoad(wxInputStream& stream)
  32 {
  33     bool canread;
  34     canread = (ReadHeader(stream) == _T("XMLBIN "));
  35     stream.SeekI(-9, wxFromCurrent);
  36     return canread;
  37 }
  38
  39
  40
  41 wxString wxXmlIOHandlerBin::ReadHeader(wxInputStream& stream)
  42 {
  43     wxUint8 version;
  44     char cheader[8];
  45
  46     stream.Read(cheader, 8);
  47     cheader[7] = 0;
  48     stream.Read(&version, 1);
  49
  50     if (version != 1) return wxEmptyString;
  51     else return wxString(cheader);
  52 }
  53
  54
  55
  56 void wxXmlIOHandlerBin::WriteHeader(wxOutputStream& stream, const wxString& header)
  57 {
  58     char cheader[8];
  59     size_t i;
  60     wxUint8 version = 1;
  61
  62     for (i = 0; i < header.Length(); i++) cheader[i] = header[i];
  63     for (; i < 7; i++) cheader[i] = ' ';
  64     cheader[7] = 0;
  65     stream.Write(cheader, 8);
  66     stream.Write(&version, 1);
  67 }
  68
  69
  70
  71 static bool SaveBinNode(wxDataOutputStream& ds, wxXmlNode *node)
  72 {
  73     if (node)
  74     {
  75         ds << (wxUint8)1 <<
  76               (wxUint8)node->GetType() <<
  77               node->GetName() << node->GetContent();
  78
  79         wxXmlProperty *prop = node->GetProperties();
  80         while (prop)
  81         {
  82             ds << (wxUint8)1;
  83             ds << prop->GetName() << prop->GetValue();
  84             prop = prop->GetNext();
  85
  86         }
  87         ds << (wxUint8)0;
  88
  89         SaveBinNode(ds, node->GetNext());
  90         SaveBinNode(ds, node->GetChildren());
  91     }
  92     else
  93         ds << (wxUint8)0;
  94
  95     return TRUE;
  96 }
  97
  98
  99
 100 bool wxXmlIOHandlerBin::Save(wxOutputStream& stream, const wxXmlDocument& doc)
 101 {
 102     WriteHeader(stream, "XMLBIN ");
 103     wxDataOutputStream ds(stream);
 104     ds << doc.GetVersion() << doc.GetEncoding();
 105     SaveBinNode(ds, doc.GetRoot());
 106     return stream.LastError() == wxSTREAM_NOERROR;
 107 }
 108
 109
 110
 111 static wxXmlProperty *LoadBinProp(wxDataInputStream& ds)
 112 {
 113     wxUint8 dummy;
 114     ds >> dummy;
 115     if (dummy == 0) return NULL;
 116
 117     wxString name, value;
 118     ds >> name >> value;
 119     return new wxXmlProperty(name, value, LoadBinProp(ds));
 120 }
 121
 122
 123
 124
 125 static wxXmlNode *LoadBinNode(wxDataInputStream& ds, wxXmlNode *parent)
 126 {
 127     wxUint8 type;
 128     wxString name, content;
 129     wxUint8 dummy;
 130
 131     ds >> dummy;
 132     if (dummy == 0) return NULL;
 133     ds >> type >> name >> content;
 134
 135     wxXmlProperty *prop = LoadBinProp(ds);
 136
 137     wxXmlNode *nd = new wxXmlNode(parent, (wxXmlNodeType)type, name, content,
 138                                   prop, LoadBinNode(ds, parent));
 139     LoadBinNode(ds, nd);
 140     return nd;
 141 }
 142
 143
 144
 145 bool wxXmlIOHandlerBin::Load(wxInputStream& stream, wxXmlDocument& doc)
 146 {
 147     ReadHeader(stream);
 148     wxDataInputStream ds(stream);
 149     wxString tmp;
 150
 151     ds >> tmp;
 152     doc.SetVersion(tmp);
 153     ds >> tmp;
 154     doc.SetEncoding(tmp);
 155
 156     doc.SetRoot(LoadBinNode(ds, NULL));
 157
 158     return (doc.GetRoot() != NULL);
 159 }
 160
 161