/**
* Constructs a digital net in base 2 after reading its parameters from file `filename`. See the
* documentation in
*
* @ref umontreal.ssj.hups.DigitalNetFromFile. Parameter `w` gives the number of bits of
* resolution, `r1` is the number of rows, and `s1` is the dimension. Restrictions: `s1` must
* be less than the maximal dimension, and `r1` less than the maximal number of rows in the
* data file. Also `w` @f$\ge@f$ `r1`.
* @param filename Name of the file to be read
* @param r1 Number of rows for the generating matrices
* @param w Number of bits of resolution
* @param s1 Number of dimensions
*/
public DigitalNetBase2FromFile(String filename, int r1, int w, int s1)
throws IOException, MalformedURLException {
super();
if (w < r1 || w > MAXBITS) throw new IllegalArgumentException(" Must have numRows <= w <= 31");
BufferedReader input;
if (filename.startsWith("http:") || filename.startsWith("ftp:"))
input = DigitalNetFromFile.openURL(filename);
else input = DigitalNetFromFile.openFile(filename);
try {
readData(input, r1, s1);
} catch (NumberFormatException e) {
System.err.println(" DigitalNetBase2FromFile: cannot read from " + filename);
throw e;
} catch (IOException e) {
System.err.println(" DigitalNetBase2FromFile: cannot read from " + filename);
throw e;
}
input.close();
maskRows(numRows, w);
outDigits = w;
if (numCols >= MAXBITS) throw new IllegalArgumentException(" Must have numCols < 31");
this.filename = filename;
int x = (1 << numCols);
if (x != numPoints) {
System.out.println("numPoints != 2^k");
throw new IllegalArgumentException("numPoints != 2^k");
}
// Compute the normalization factors.
normFactor = 1.0 / ((double) (1L << (outDigits)));
}
/**
* Lists all files (or directories) in directory `dirname`. Only relative pathnames should be
* used. The files are parameter files used in defining digital nets. For example, calling
* `listDir("")` will give the list of the main data directory in SSJ, while calling
* `listDir("Edel/OOA2")` will give the list of all files in directory `Edel/OOA2`.
*/
public static String listDir(String dirname) throws IOException {
return DigitalNetFromFile.listDir(dirname);
}
