// 7.2.9 RDF
// start-element ( URI == rdf:RDF, attributes == set() )
// nodeElementList
// end-element()
private XmpNode ParseRDF (XmlNode rdf_node, TagLib.File file)
{
XmpNode top = new XmpNode (String.Empty, String.Empty);
foreach (XmlNode node in rdf_node.ChildNodes) {
if (node is XmlWhitespace)
continue;
if (node.Is (RDF_NS, DESCRIPTION_URI)) {
var attr = node.Attributes.GetNamedItem (RDF_NS, ABOUT_URI) as XmlAttribute;
if (attr != null) {
if (top.Name != String.Empty && top.Name != attr.InnerText)
throw new CorruptFileException ("Multiple inconsistent rdf:about values!");
top.Name = attr.InnerText;
}
continue;
}
file.MarkAsCorrupt ("Cannot have anything other than rdf:Description at the top level");
return top;
}
ParseNodeElementList (top, rdf_node);
return top;
}
/// <summary>
/// Construcor.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="data">
/// A <see cref="ByteVector"/> to be stored
/// </param>
/// <param name="file">
/// The file that's currently being parsed, used for reporting corruptions.
/// </param>
public UserCommentIFDEntry(ushort tag, ByteVector data, TagLib.File file)
{
Tag = tag;
if (data.StartsWith (COMMENT_ASCII_CODE)) {
Value = TrimNull (data.ToString (StringType.Latin1, COMMENT_ASCII_CODE.Count, data.Count - COMMENT_ASCII_CODE.Count));
return;
}
if (data.StartsWith (COMMENT_UNICODE_CODE)) {
Value = TrimNull (data.ToString (StringType.UTF8, COMMENT_UNICODE_CODE.Count, data.Count - COMMENT_UNICODE_CODE.Count));
return;
}
var trimmed = data.ToString ().Trim ();
if (trimmed.Length == 0 || trimmed == "\0") {
Value = String.Empty;
return;
}
// Some programs like e.g. CanonZoomBrowser inserts just the first 0x00-byte
// followed by 7-bytes of trash.
if (data.StartsWith ((byte) 0x00) && data.Count >= 8) {
// And CanonZoomBrowser fills some trailing bytes of the comment field
// with '\0'. So we return only the characters before the first '\0'.
int term = data.Find ("\0", 8);
if (term != -1) {
Value = data.ToString (StringType.Latin1, 8, term - 8);
} else {
Value = data.ToString (StringType.Latin1, 8, data.Count - 8);
}
return;
}
if (data.Data.Length == 0) {
Value = String.Empty;
return;
}
// Try to parse anyway
int offset = 0;
int length = data.Count - offset;
// Corruption that starts with a Unicode header and a count byte.
if (data.StartsWith (COMMENT_BAD_UNICODE_CODE)) {
offset = COMMENT_BAD_UNICODE_CODE.Count;
length = data.Count - offset;
}
file.MarkAsCorrupt ("UserComment with other encoding than Latin1 or Unicode");
Value = TrimNull (data.ToString (StringType.UTF8, offset, length));
}