+// ----------------------------------------------------------------------------
+// exporting registry keys to file
+// ----------------------------------------------------------------------------
+
+// helper functions for writing ASCII strings (even in Unicode build)
+static inline bool WriteAsciiChar(wxOutputStream& ostr, char ch)
+{
+ ostr.PutC(ch);
+ return ostr.IsOk();
+}
+
+static inline bool WriteAsciiEOL(wxOutputStream& ostr)
+{
+ // as we open the file in text mode, it is enough to write LF without CR
+ return WriteAsciiChar(ostr, '\n');
+}
+
+static inline bool WriteAsciiString(wxOutputStream& ostr, const char *p)
+{
+ return ostr.Write(p, strlen(p)).IsOk();
+}
+
+static inline bool WriteAsciiString(wxOutputStream& ostr, const wxString& s)
+{
+#if wxUSE_UNICODE
+ wxCharBuffer name(s.mb_str());
+ ostr.Write(name, strlen(name));
+#else
+ ostr.Write(s, s.length());
+#endif
+
+ return ostr.IsOk();
+}
+
+bool wxRegKey::Export(const wxString& filename) const
+{
+ if ( wxFile::Exists(filename) )
+ {
+ wxLogError(_("Exporting registry key: file \"%s\" already exists and won't be overwritten."),
+ filename.c_str());
+ return false;
+ }
+
+ wxFFileOutputStream ostr(filename, _T("w"));
+
+ return ostr.Ok() && Export(ostr);
+}
+
+bool wxRegKey::Export(wxOutputStream& ostr) const
+{
+ // write out the header
+ if ( !WriteAsciiString(ostr, "REGEDIT4\n\n") )
+ return false;
+
+ return DoExport(ostr);
+}
+
+static
+wxString
+FormatAsHex(const void *data,
+ size_t size,
+ wxRegKey::ValueType type = wxRegKey::Type_Binary)
+{
+ wxString value(_T("hex"));
+
+ // binary values use just "hex:" prefix while the other ones must indicate
+ // the real type
+ if ( type != wxRegKey::Type_Binary )
+ value << _T('(') << type << _T(')');
+ value << _T(':');
+
+ // write all the rest as comma-separated bytes
+ value.reserve(3*size + 10);
+ const char * const p = wx_static_cast(const char *, data);
+ for ( size_t n = 0; n < size; n++ )
+ {
+ // TODO: line wrapping: although not required by regedit, this makes
+ // the generated files easier to read and compare with the files
+ // produced by regedit
+ if ( n )
+ value << _T(',');
+
+ value << wxString::Format(_T("%02x"), p[n]);
+ }
+
+ return value;
+}
+
+static inline
+wxString FormatAsHex(const wxString& value, wxRegKey::ValueType type)
+{
+ return FormatAsHex(value.c_str(), value.length() + 1, type);
+}
+
+wxString wxRegKey::FormatValue(const wxString& name) const
+{
+ wxString rhs;
+ const ValueType type = GetValueType(name);
+ switch ( type )
+ {
+ case Type_String:
+ {
+ wxString value;
+ if ( !QueryValue(name, value) )
+ break;
+
+ // quotes and backslashes must be quoted, linefeeds are not
+ // allowed in string values
+ rhs.reserve(value.length() + 2);
+ rhs = _T('"');
+
+ // there can be no NULs here
+ bool useHex = false;
+ for ( const wxChar *p = value.c_str(); *p && !useHex; p++ )
+ {
+ switch ( *p )
+ {
+ case _T('\n'):
+ // we can only represent this string in hex
+ useHex = true;
+ break;
+
+ case _T('"'):
+ case _T('\\'):
+ // escape special symbol
+ rhs += _T('\\');
+ // fall through
+
+ default:
+ rhs += *p;
+ }
+ }
+
+ if ( useHex )
+ rhs = FormatAsHex(value, Type_String);
+ else
+ rhs += _T('"');
+ }
+ break;
+
+ case Type_Dword:
+ /* case Type_Dword_little_endian: == Type_Dword */
+ {
+ long value;
+ if ( !QueryValue(name, &value) )
+ break;
+
+ rhs.Printf(_T("dword:%08x"), value);
+ }
+ break;
+
+ case Type_Expand_String:
+ case Type_Multi_String:
+ {
+ wxString value;
+ if ( !QueryRawValue(name, value) )
+ break;
+
+ rhs = FormatAsHex(value, type);
+ }
+ break;
+
+ case Type_Binary:
+ {
+ wxMemoryBuffer buf;
+ if ( !QueryValue(name, buf) )
+ break;
+
+ rhs = FormatAsHex(buf.GetData(), buf.GetDataLen());
+ }
+ break;
+
+ // no idea how those appear in REGEDIT4 files
+ case Type_None:
+ case Type_Dword_big_endian:
+ case Type_Link:
+ case Type_Resource_list:
+ case Type_Full_resource_descriptor:
+ case Type_Resource_requirements_list:
+ default:
+ wxLogWarning(_("Can't export value of unsupported type %d."), type);
+ }
+
+ return rhs;
+}
+
+bool wxRegKey::DoExportValue(wxOutputStream& ostr, const wxString& name) const
+{
+ // first examine the value type: if it's unsupported, simply skip it
+ // instead of aborting the entire export process because we failed to
+ // export a single value
+ wxString value = FormatValue(name);
+ if ( value.empty() )
+ {
+ wxLogWarning(_("Ignoring value \"%s\" of the key \"%s\"."),
+ name.c_str(), GetName().c_str());
+ return true;
+ }
+
+ // we do have the text representation of the value, now write everything
+ // out
+
+ // special case: unnamed/default value is represented as just "@"
+ if ( name.empty() )
+ {
+ if ( !WriteAsciiChar(ostr, '@') )
+ return false;
+ }
+ else // normal, named, value
+ {
+ if ( !WriteAsciiChar(ostr, '"') ||
+ !WriteAsciiString(ostr, name) ||
+ !WriteAsciiChar(ostr, '"') )
+ return false;
+ }
+
+ if ( !WriteAsciiChar(ostr, '=') )
+ return false;
+
+ return WriteAsciiString(ostr, value) && WriteAsciiEOL(ostr);
+}
+
+bool wxRegKey::DoExport(wxOutputStream& ostr) const
+{
+ // write out this key name
+ if ( !WriteAsciiChar(ostr, '[') )
+ return false;
+
+ if ( !WriteAsciiString(ostr, GetName(false /* no short prefix */)) )
+ return false;
+
+ if ( !WriteAsciiChar(ostr, ']') || !WriteAsciiEOL(ostr) )
+ return false;
+
+ // dump all our values
+ long dummy;
+ wxString name;
+ wxRegKey& self = wx_const_cast(wxRegKey&, *this);
+ bool cont = self.GetFirstValue(name, dummy);
+ while ( cont )
+ {
+ if ( !DoExportValue(ostr, name) )
+ return false;
+
+ cont = GetNextValue(name, dummy);
+ }
+
+ // always terminate values by blank line, even if there were no values
+ if ( !WriteAsciiEOL(ostr) )
+ return false;
+
+ // recurse to subkeys
+ cont = self.GetFirstKey(name, dummy);
+ while ( cont )
+ {
+ wxRegKey subkey(*this, name);
+ if ( !subkey.DoExport(ostr) )
+ return false;
+
+ cont = GetNextKey(name, dummy);
+ }
+
+ return true;
+}
+
projects / wxWidgets.git / commitdiff
