contrib/src/xrc/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/xrc/xmlio.h"
  27
  28
  29
  30
  31 bool wxXmlIOHandlerBin::CanLoad(wxInputStream& stream)
  32 {
  33     bool canread;
  34     canread = (ReadHeader(stream) == wxT("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();
 105 #if wxUSE_UNICODE
 106     ds << wxString(wxT("UTF-8"));
 107 #else
 108     ds << doc.GetEncoding();
 109 #endif
 110     SaveBinNode(ds, doc.GetRoot());
 111     return stream.LastError() == wxSTREAM_NOERROR;
 112 }
 113
 114
 115
 116 static wxXmlProperty *LoadBinProp(wxDataInputStream& ds)
 117 {
 118     wxUint8 dummy;
 119     ds >> dummy;
 120     if (dummy == 0) return NULL;
 121
 122     wxString name, value;
 123     ds >> name >> value;
 124     return new wxXmlProperty(name, value, LoadBinProp(ds));
 125 }
 126
 127
 128
 129
 130 static wxXmlNode *LoadBinNode(wxDataInputStream& ds, wxXmlNode *parent)
 131 {
 132     wxUint8 type;
 133     wxString name, content;
 134     wxUint8 dummy;
 135
 136     ds >> dummy;
 137     if (dummy == 0) return NULL;
 138     ds >> type >> name >> content;
 139
 140     wxXmlProperty *prop = LoadBinProp(ds);
 141
 142     wxXmlNode *nd = new wxXmlNode(parent, (wxXmlNodeType)type, name, content,
 143                                   prop, LoadBinNode(ds, parent));
 144     LoadBinNode(ds, nd);
 145     return nd;
 146 }
 147
 148
 149
 150 bool wxXmlIOHandlerBin::Load(wxInputStream& stream, wxXmlDocument& doc,
 151                              const wxString& encoding)
 152 {
 153     ReadHeader(stream);
 154     wxDataInputStream ds(stream);
 155     wxString tmp;
 156
 157     ds >> tmp;
 158     doc.SetVersion(tmp);
 159     ds >> tmp;
 160     doc.SetFileEncoding(tmp);
 161
 162     doc.SetRoot(LoadBinNode(ds, NULL));
 163
 164     return (doc.GetRoot() != NULL);
 165 }
 166
 167