/// <summary>
/// Parses the file referenced by the current instance,
/// searching for box headers that will be useful in saving
/// the file.
/// </summary>
public void ParseBoxHeaders()
{
try {
ResetFields();
ParseBoxHeaders(first_header.TotalBoxSize, file.Length, null);
} catch (CorruptFileException e) {
file.MarkAsCorrupt(e.Message);
}
}
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);
}
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;
}
if (data.StartsWith((byte)0x00) && data.Count >= 8)
{
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;
}
int offset = 0;
int length = data.Count - offset;
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));
}
/// <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));
}
