# Source code for obspy.db.util

    # -*- coding: utf-8 -*-
    """
    Additional utilities for obspy.db.

    :copyright:
        The ObsPy Development Team (devs@obspy.org)
    :license:
        GNU Lesser General Public License, Version 3
        (https://www.gnu.org/copyleft/lesser.html)
    """
    from __future__ import (absolute_import, division, print_function,
                            unicode_literals)
    from future.builtins import *  # NOQA

    from obspy import UTCDateTime

    def parse_mapping_data(lines):
        """
        Parses a mapping file used by the indexer.
        """
        results = {}
        for line in lines:
            if line.startswith('#'):
                continue
            if line.strip() == '':
                continue
            temp = {}
            data = line.split()
            msg = "Invalid format in mapping data: "
            # check old and new ids
            if len(data) < 2 or len(data) > 4:
                raise Exception(msg + 'expected "old_id new_id starttime endtime"')
            elif data[0].count('.') != 3:
                raise Exception(msg + "old id %s must contain 3 dots" % data[0])
            elif data[1].count('.') != 3:
                raise Exception(msg + "new id %s must contain 3 dots" % data[1])
            old_id = data[0]
            n0, s0, l0, c0 = old_id.split('.')
            n1, s1, l1, c1 = data[1].split('.')
            if len(n0) > 2 or len(n1) > 2:
                raise Exception(msg + "network ids must not exceed 2 characters")
            elif len(s0) > 5 or len(s1) > 5:
                raise Exception(msg + "station ids must not exceed 5 characters")
            elif len(l0) > 2 or len(l1) > 2:
                raise Exception(msg + "location ids must not exceed 2 characters")
            elif len(c0) > 3 or len(c1) > 3:
                raise Exception(msg + "channel ids must not exceed 3 characters")
            temp['network'] = n1
            temp['station'] = s1
            temp['location'] = l1
            temp['channel'] = c1
            # check datetimes if any
            if len(data) > 2:
                try:
                    temp['starttime'] = UTCDateTime(data[2])
                except Exception:
                    msg += "starttime '%s' is not a time format"
                    raise Exception(msg % data[2])
            else:
                temp['starttime'] = None
            if len(data) > 3:
                try:
                    temp['endtime'] = UTCDateTime(data[3])
                except Exception:
                    msg += "endtime '%s' is not a time format"
                    raise Exception(msg % data[3])
                if temp['endtime'] < temp['starttime']:
                    msg += "endtime '%s' should be after starttime"
                    raise Exception(msg % data[3])
            else:
                temp['endtime'] = None
            results.setdefault(old_id, [])
            results.get(old_id).append(temp)
        return results

### Thank you!

We would like to thank our contributors, whose efforts make this software what it is. These people have helped by writing code and documentation, and by testing. They have created and maintained this product, its associated libraries and applications, our build tools and our web sites.

#### Contributors

- Ackerley, Nick
- Allgeyer, Sebastien
- Ammon, Charles J.
- Antunes, Emanuel
- Arnarsson, Ólafur St.
- Bank, Markus
- Barsch, Robert
- Behr, Yannik
- Bernardi, Fabrizio
- Bernauer, Felix
- Bes de Berc, Maxime
- Beyreuther, Moritz
- Boltz, Shawn
- Bonaimé, Sébastien
- Carothers, Lloyd
- Chamberlain, Calum
- Chambers, Derrick
- Chen, Zhao
- Clark, Adam
- Danecek, Peter
- Egdorf, Sven
- Engels, Fabian
- Ermert, Laura
- Eulenfeld, Tom

- Fabbri, Tommaso
- Falco, Nicholas
- Fee, Jeremy
- Grellier, Clément
- Grunberg, Marc
- Hammer, Conny
- Heimann, Sebastian
- Heiniger, Lukas
- Hope, Gaute
- Igel, Heiner
- Inza, Adolfo
- Isken, Marius
- Ketchum, David
- Koymans, Mathijs
- Kremers, Simon
- Kress, Victor
- Krieger, Lars
- Krischer, Lion
- Kula, Damian
- Käufl, Paul
- Köhler, Andreas
- Lecocq, Thomas
- Leeman, John
- Legovini, Paride

- Lesage, Philippe
- Li, Yulin
- Lomax, Anthony
- Lopes, Rui L.
- MacCarthy, Jonathan
- Maggi, Alessia
- Martin, Henri
- Medlin, Andrew
- Megies, Tobias
- Meschede, Matthias
- Michelini, Alberto
- Miller, Nathaniel C.
- Morgenstern, Bernhard
- Nof, Ran Novitsky
- Panning, Mark P.
- Parker, Tom
- Pestourie, Romain
- Rapagnani, Giovanni
- Reyes, Celso
- Ringler, Adam
- Rothenhäusler, Nicolas
- Russo, Emiliano
- Sales de Andrade, Elliott

- Satriano, Claudio
- Saul, Joachim
- Scheingraber, Chris
- Schneider, Simon
- Sippl, Christian
- Snoke, Arthur
- Stange, Stefan
- Stähler, Simon C.
- Sullivan, Benjamin
- Tian, Dongdong
- Trabant, Chad
- Trani, Luca
- Uieda, Leonardo
- Walker, Andrew
- Walther, Marcus
- Wassermann, Joachim
- Williams, Mark C.
- Winkelman, Andrew
- Zaccarelli, Riccardo
- Zad, Seyed Kasra Hosseini
- Zhu, Lijun
- van Driel, Martin
- van Wijk, Kasper

#### Funds

ObsPy was partially funded by the

- German Science Foundation (DFG) via grant DFG IG 16/9-1
- German Ministry for Education and Research (BMBF), GEOTECHNOLOGIEN grant 03G0646H.
- NERA project (Network of European Research Infrastructures for Earthquake Risk Assessment and Mitigation) under the European Community's Seventh Framework Programme (FP7/2007-2013) grant agreement n° 262330
- Leibniz Institute for Applied Geophysics (LIAG)
- VERCE EU-FP7 project (no. 283543)