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Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

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/*
 * Copyright 2000 Finn Bock
 *
 * This program contains material copyrighted by:
 * Copyright (c) 1997-2000 by Secret Labs AB.  All rights reserved.
 *
 * This version of the SRE library can be redistributed under CNRI's
 * Python 1.6 license.  For any other use, please contact Secret Labs
 * AB ([email protected]).
 *
 * Portions of this engine have been developed in cooperation with
 * CNRI.  Hewlett-Packard provided funding for 1.6 integration and
 * other compatibility work.
 */

package org.python.modules;

import java.util.Iterator;
import org.python.core.Py;
import org.python.core.PyInteger;
import org.python.core.PyList;
import org.python.core.PyLong;
import org.python.core.PyObject;
import org.python.core.PyString;
import org.python.modules.sre.PatternObject;
import org.python.modules.sre.SRE_STATE;


public class _sre {
    public static int MAGIC = SRE_STATE.SRE_MAGIC;

    // workaround the fact that H, I types are unsigned, but we are not really using them as such
    //XXX: May not be the right size, but I suspect it is -- see sre_compile.py
    public static int CODESIZE = 4;

    public static PatternObject compile(PyString pattern, int flags,
                                        PyObject code, int groups,
                                        PyObject groupindex,
                                        PyObject indexgroup) {
        int[] ccode = null;
        if (code instanceof PyList) {
            int n = code.__len__();
            ccode = new int[n];
            int i = 0;
            for (PyObject item : code.asIterable()) {
                ccode[i] = (int)((PyLong)item.__long__()).getValue().longValue();
                i++;
            }
        } else {
            throw Py.TypeError("Expected list");
        }

        PatternObject po = new PatternObject(pattern,
                                             flags,
                                             ccode,
                                             groups,
                                             groupindex,
                                             indexgroup);
        return po;
    }



    public static int getcodesize() {
        return CODESIZE;
    }


    public static int getlower(int ch, int flags) {
        return SRE_STATE.getlower(ch, flags);
    }
}