public IRandomAccessSource CreateRanged(IRandomAccessSource source, IList<long> ranges) {
IRandomAccessSource[] sources = new IRandomAccessSource[ranges.Count/2];
for(int i = 0; i < ranges.Count; i+=2){
sources[i/2] = new WindowRandomAccessSource(source, ranges[i], ranges[i+1]);
}
return new GroupedRandomAccessSource(sources);
}
virtual public void TestBasics()
{
WindowRandomAccessSource window = new WindowRandomAccessSource(source, 7, 17);
Assert.AreEqual(17, window.Length);
byte[] output = new byte[45];
Assert.AreEqual(17, window.Get(0, output, 0, 17));
Assert.AreEqual(7, window.Get(0));
Assert.AreEqual(17, window.Get(10));
Assert.AreEqual(-1, window.Get(17));
Assert.AreEqual(17, window.Get(0, output, 0, 45));
for (int i = 0; i < 17; i++)
{
Assert.AreEqual(data[i + 7], output[i]);
}
}
/**
* Utility method that checks the provided byte source to see if it has junk bytes at the beginning. If junk bytes
* are found, construct a tokeniser that ignores the junk. Otherwise, construct a tokeniser for the byte source as it is
* @param byteSource the source to check
* @return a tokeniser that is guaranteed to start at the PDF header
* @throws IOException if there is a problem reading the byte source
*/
private static PRTokeniser GetOffsetTokeniser(IRandomAccessSource byteSource) {
PRTokeniser tok = new PRTokeniser(new RandomAccessFileOrArray(byteSource));
int offset = tok.GetHeaderOffset();
if (offset != 0){
IRandomAccessSource offsetSource = new WindowRandomAccessSource(byteSource, offset);
tok = new PRTokeniser(new RandomAccessFileOrArray(offsetSource));
}
return tok;
}
public IRandomAccessSource CreateRanged(IRandomAccessSource source, IList<long> ranges) {
IRandomAccessSource[] sources = new IRandomAccessSource[ranges.Count/2];
for(int i = 0; i < ranges.Count; i+=2){
sources[i/2] = new WindowRandomAccessSource(source, ranges[i], ranges[i+1]);
}
return new GroupedRandomAccessSource(sources);
}