private BuildDirectoryInfo TryGetDirectory(string[] path, int pathLength, bool createMissing)
{
BuildDirectoryInfo focus = _rootDirectory;
for (int i = 0; i < pathLength; ++i)
{
BuildDirectoryMember next;
if (!focus.TryGetMember(path[i], out next))
{
if (createMissing)
{
// This directory doesn't exist, create it...
BuildDirectoryInfo di = new BuildDirectoryInfo(path[i], focus);
focus.Add(di);
_dirs.Add(di);
focus = di;
}
else
{
return(null);
}
}
else
{
BuildDirectoryInfo nextAsBuildDirectoryInfo = next as BuildDirectoryInfo;
if (nextAsBuildDirectoryInfo == null)
{
throw new IOException("File with conflicting name exists");
}
else
{
focus = nextAsBuildDirectoryInfo;
}
}
}
return(focus);
}
/// <summary>
/// Adds a stream to the ISO image as a file.
/// </summary>
/// <param name="name">The name of the file on the ISO image.</param>
/// <param name="source">The contents of the file.</param>
/// <returns>The object representing this file.</returns>
/// <remarks>
/// The name is the full path to the file, for example:
/// <example><code>
/// builder.AddFile(@"DIRA\DIRB\FILE.TXT;1", stream);
/// </code></example>
/// <para>Note the version number at the end of the file name is optional, if not
/// specified the default of 1 will be used.</para>
/// </remarks>
public BuildFileInfo AddFile(string name, Stream source)
{
if (!source.CanSeek)
{
throw new ArgumentException("source doesn't support seeking", "source");
}
string[] nameElements = name.Split('\\');
BuildDirectoryInfo dir = GetDirectory(nameElements, nameElements.Length - 1, true);
BuildDirectoryMember existing;
if (dir.TryGetMember(nameElements[nameElements.Length - 1], out existing))
{
throw new IOException("File already exists");
}
else
{
BuildFileInfo fi = new BuildFileInfo(nameElements[nameElements.Length - 1], dir, source);
_files.Add(fi);
dir.Add(fi);
return(fi);
}
}