Import gdb 7.10 linux-x86_64 prebuilt.

Taken from aosp-master-ndk build 2274331.

Bug: http://b/21920612
Change-Id: I2129ab5b85c96273bdb97ee9ca82116bb4db87fa

1 files changed, 1005 insertions, 0 deletions

diff --git a/lib/python2.7/mhlib.py b/lib/python2.7/mhlib.py
new file mode 100644
index 0000000..856e878
--- /dev/null
+++ b/lib/python2.7/mhlib.py
@@ -0,0 +1,1005 @@
+"""MH interface -- purely object-oriented (well, almost)
+
+Executive summary:
+
+import mhlib
+
+mh = mhlib.MH()         # use default mailbox directory and profile
+mh = mhlib.MH(mailbox)  # override mailbox location (default from profile)
+mh = mhlib.MH(mailbox, profile) # override mailbox and profile
+
+mh.error(format, ...)   # print error message -- can be overridden
+s = mh.getprofile(key)  # profile entry (None if not set)
+path = mh.getpath()     # mailbox pathname
+name = mh.getcontext()  # name of current folder
+mh.setcontext(name)     # set name of current folder
+
+list = mh.listfolders() # names of top-level folders
+list = mh.listallfolders() # names of all folders, including subfolders
+list = mh.listsubfolders(name) # direct subfolders of given folder
+list = mh.listallsubfolders(name) # all subfolders of given folder
+
+mh.makefolder(name)     # create new folder
+mh.deletefolder(name)   # delete folder -- must have no subfolders
+
+f = mh.openfolder(name) # new open folder object
+
+f.error(format, ...)    # same as mh.error(format, ...)
+path = f.getfullname()  # folder's full pathname
+path = f.getsequencesfilename() # full pathname of folder's sequences file
+path = f.getmessagefilename(n)  # full pathname of message n in folder
+
+list = f.listmessages() # list of messages in folder (as numbers)
+n = f.getcurrent()      # get current message
+f.setcurrent(n)         # set current message
+list = f.parsesequence(seq)     # parse msgs syntax into list of messages
+n = f.getlast()         # get last message (0 if no messagse)
+f.setlast(n)            # set last message (internal use only)
+
+dict = f.getsequences() # dictionary of sequences in folder {name: list}
+f.putsequences(dict)    # write sequences back to folder
+
+f.createmessage(n, fp)  # add message from file f as number n
+f.removemessages(list)  # remove messages in list from folder
+f.refilemessages(list, tofolder) # move messages in list to other folder
+f.movemessage(n, tofolder, ton)  # move one message to a given destination
+f.copymessage(n, tofolder, ton)  # copy one message to a given destination
+
+m = f.openmessage(n)    # new open message object (costs a file descriptor)
+m is a derived class of mimetools.Message(rfc822.Message), with:
+s = m.getheadertext()   # text of message's headers
+s = m.getheadertext(pred) # text of message's headers, filtered by pred
+s = m.getbodytext()     # text of message's body, decoded
+s = m.getbodytext(0)    # text of message's body, not decoded
+"""
+from warnings import warnpy3k
+warnpy3k("the mhlib module has been removed in Python 3.0; use the mailbox "
+            "module instead", stacklevel=2)
+del warnpy3k
+
+# XXX To do, functionality:
+# - annotate messages
+# - send messages
+#
+# XXX To do, organization:
+# - move IntSet to separate file
+# - move most Message functionality to module mimetools
+
+
+# Customizable defaults
+
+MH_PROFILE = '~/.mh_profile'
+PATH = '~/Mail'
+MH_SEQUENCES = '.mh_sequences'
+FOLDER_PROTECT = 0700
+
+
+# Imported modules
+
+import os
+import sys
+import re
+import mimetools
+import multifile
+import shutil
+from bisect import bisect
+
+__all__ = ["MH","Error","Folder","Message"]
+
+# Exported constants
+
+class Error(Exception):
+    pass
+
+
+class MH:
+    """Class representing a particular collection of folders.
+    Optional constructor arguments are the pathname for the directory
+    containing the collection, and the MH profile to use.
+    If either is omitted or empty a default is used; the default
+    directory is taken from the MH profile if it is specified there."""
+
+    def __init__(self, path = None, profile = None):
+        """Constructor."""
+        if profile is None: profile = MH_PROFILE
+        self.profile = os.path.expanduser(profile)
+        if path is None: path = self.getprofile('Path')
+        if not path: path = PATH
+        if not os.path.isabs(path) and path[0] != '~':
+            path = os.path.join('~', path)
+        path = os.path.expanduser(path)
+        if not os.path.isdir(path): raise Error, 'MH() path not found'
+        self.path = path
+
+    def __repr__(self):
+        """String representation."""
+        return 'MH(%r, %r)' % (self.path, self.profile)
+
+    def error(self, msg, *args):
+        """Routine to print an error.  May be overridden by a derived class."""
+        sys.stderr.write('MH error: %s\n' % (msg % args))
+
+    def getprofile(self, key):
+        """Return a profile entry, None if not found."""
+        return pickline(self.profile, key)
+
+    def getpath(self):
+        """Return the path (the name of the collection's directory)."""
+        return self.path
+
+    def getcontext(self):
+        """Return the name of the current folder."""
+        context = pickline(os.path.join(self.getpath(), 'context'),
+                  'Current-Folder')
+        if not context: context = 'inbox'
+        return context
+
+    def setcontext(self, context):
+        """Set the name of the current folder."""
+        fn = os.path.join(self.getpath(), 'context')
+        f = open(fn, "w")
+        f.write("Current-Folder: %s\n" % context)
+        f.close()
+
+    def listfolders(self):
+        """Return the names of the top-level folders."""
+        folders = []
+        path = self.getpath()
+        for name in os.listdir(path):
+            fullname = os.path.join(path, name)
+            if os.path.isdir(fullname):
+                folders.append(name)
+        folders.sort()
+        return folders
+
+    def listsubfolders(self, name):
+        """Return the names of the subfolders in a given folder
+        (prefixed with the given folder name)."""
+        fullname = os.path.join(self.path, name)
+        # Get the link count so we can avoid listing folders
+        # that have no subfolders.
+        nlinks = os.stat(fullname).st_nlink
+        if nlinks <= 2:
+            return []
+        subfolders = []
+        subnames = os.listdir(fullname)
+        for subname in subnames:
+            fullsubname = os.path.join(fullname, subname)
+            if os.path.isdir(fullsubname):
+                name_subname = os.path.join(name, subname)
+                subfolders.append(name_subname)
+                # Stop looking for subfolders when
+                # we've seen them all
+                nlinks = nlinks - 1
+                if nlinks <= 2:
+                    break
+        subfolders.sort()
+        return subfolders
+
+    def listallfolders(self):
+        """Return the names of all folders and subfolders, recursively."""
+        return self.listallsubfolders('')
+
+    def listallsubfolders(self, name):
+        """Return the names of subfolders in a given folder, recursively."""
+        fullname = os.path.join(self.path, name)
+        # Get the link count so we can avoid listing folders
+        # that have no subfolders.
+        nlinks = os.stat(fullname).st_nlink
+        if nlinks <= 2:
+            return []
+        subfolders = []
+        subnames = os.listdir(fullname)
+        for subname in subnames:
+            if subname[0] == ',' or isnumeric(subname): continue
+            fullsubname = os.path.join(fullname, subname)
+            if os.path.isdir(fullsubname):
+                name_subname = os.path.join(name, subname)
+                subfolders.append(name_subname)
+                if not os.path.islink(fullsubname):
+                    subsubfolders = self.listallsubfolders(
+                              name_subname)
+                    subfolders = subfolders + subsubfolders
+                # Stop looking for subfolders when
+                # we've seen them all
+                nlinks = nlinks - 1
+                if nlinks <= 2:
+                    break
+        subfolders.sort()
+        return subfolders
+
+    def openfolder(self, name):
+        """Return a new Folder object for the named folder."""
+        return Folder(self, name)
+
+    def makefolder(self, name):
+        """Create a new folder (or raise os.error if it cannot be created)."""
+        protect = pickline(self.profile, 'Folder-Protect')
+        if protect and isnumeric(protect):
+            mode = int(protect, 8)
+        else:
+            mode = FOLDER_PROTECT
+        os.mkdir(os.path.join(self.getpath(), name), mode)
+
+    def deletefolder(self, name):
+        """Delete a folder.  This removes files in the folder but not
+        subdirectories.  Raise os.error if deleting the folder itself fails."""
+        fullname = os.path.join(self.getpath(), name)
+        for subname in os.listdir(fullname):
+            fullsubname = os.path.join(fullname, subname)
+            try:
+                os.unlink(fullsubname)
+            except os.error:
+                self.error('%s not deleted, continuing...' %
+                          fullsubname)
+        os.rmdir(fullname)
+
+
+numericprog = re.compile('^[1-9][0-9]*$')
+def isnumeric(str):
+    return numericprog.match(str) is not None
+
+class Folder:
+    """Class representing a particular folder."""
+
+    def __init__(self, mh, name):
+        """Constructor."""
+        self.mh = mh
+        self.name = name
+        if not os.path.isdir(self.getfullname()):
+            raise Error, 'no folder %s' % name
+
+    def __repr__(self):
+        """String representation."""
+        return 'Folder(%r, %r)' % (self.mh, self.name)
+
+    def error(self, *args):
+        """Error message handler."""
+        self.mh.error(*args)
+
+    def getfullname(self):
+        """Return the full pathname of the folder."""
+        return os.path.join(self.mh.path, self.name)
+
+    def getsequencesfilename(self):
+        """Return the full pathname of the folder's sequences file."""
+        return os.path.join(self.getfullname(), MH_SEQUENCES)
+
+    def getmessagefilename(self, n):
+        """Return the full pathname of a message in the folder."""
+        return os.path.join(self.getfullname(), str(n))
+
+    def listsubfolders(self):
+        """Return list of direct subfolders."""
+        return self.mh.listsubfolders(self.name)
+
+    def listallsubfolders(self):
+        """Return list of all subfolders."""
+        return self.mh.listallsubfolders(self.name)
+
+    def listmessages(self):
+        """Return the list of messages currently present in the folder.
+        As a side effect, set self.last to the last message (or 0)."""
+        messages = []
+        match = numericprog.match
+        append = messages.append
+        for name in os.listdir(self.getfullname()):
+            if match(name):
+                append(name)
+        messages = map(int, messages)
+        messages.sort()
+        if messages:
+            self.last = messages[-1]
+        else:
+            self.last = 0
+        return messages
+
+    def getsequences(self):
+        """Return the set of sequences for the folder."""
+        sequences = {}
+        fullname = self.getsequencesfilename()
+        try:
+            f = open(fullname, 'r')
+        except IOError:
+            return sequences
+        while 1:
+            line = f.readline()
+            if not line: break
+            fields = line.split(':')
+            if len(fields) != 2:
+                self.error('bad sequence in %s: %s' %
+                          (fullname, line.strip()))
+            key = fields[0].strip()
+            value = IntSet(fields[1].strip(), ' ').tolist()
+            sequences[key] = value
+        return sequences
+
+    def putsequences(self, sequences):
+        """Write the set of sequences back to the folder."""
+        fullname = self.getsequencesfilename()
+        f = None
+        for key, seq in sequences.iteritems():
+            s = IntSet('', ' ')
+            s.fromlist(seq)
+            if not f: f = open(fullname, 'w')
+            f.write('%s: %s\n' % (key, s.tostring()))
+        if not f:
+            try:
+                os.unlink(fullname)
+            except os.error:
+                pass
+        else:
+            f.close()
+
+    def getcurrent(self):
+        """Return the current message.  Raise Error when there is none."""
+        seqs = self.getsequences()
+        try:
+            return max(seqs['cur'])
+        except (ValueError, KeyError):
+            raise Error, "no cur message"
+
+    def setcurrent(self, n):
+        """Set the current message."""
+        updateline(self.getsequencesfilename(), 'cur', str(n), 0)
+
+    def parsesequence(self, seq):
+        """Parse an MH sequence specification into a message list.
+        Attempt to mimic mh-sequence(5) as close as possible.
+        Also attempt to mimic observed behavior regarding which
+        conditions cause which error messages."""
+        # XXX Still not complete (see mh-format(5)).
+        # Missing are:
+        # - 'prev', 'next' as count
+        # - Sequence-Negation option
+        all = self.listmessages()
+        # Observed behavior: test for empty folder is done first
+        if not all:
+            raise Error, "no messages in %s" % self.name
+        # Common case first: all is frequently the default
+        if seq == 'all':
+            return all
+        # Test for X:Y before X-Y because 'seq:-n' matches both
+        i = seq.find(':')
+        if i >= 0:
+            head, dir, tail = seq[:i], '', seq[i+1:]
+            if tail[:1] in '-+':
+                dir, tail = tail[:1], tail[1:]
+            if not isnumeric(tail):
+                raise Error, "bad message list %s" % seq
+            try:
+                count = int(tail)
+            except (ValueError, OverflowError):
+                # Can't use sys.maxint because of i+count below
+                count = len(all)
+            try:
+                anchor = self._parseindex(head, all)
+            except Error, msg:
+                seqs = self.getsequences()
+                if not head in seqs:
+                    if not msg:
+                        msg = "bad message list %s" % seq
+                    raise Error, msg, sys.exc_info()[2]
+                msgs = seqs[head]
+                if not msgs:
+                    raise Error, "sequence %s empty" % head
+                if dir == '-':
+                    return msgs[-count:]
+                else:
+                    return msgs[:count]
+            else:
+                if not dir:
+                    if head in ('prev', 'last'):
+                        dir = '-'
+                if dir == '-':
+                    i = bisect(all, anchor)
+                    return all[max(0, i-count):i]
+                else:
+                    i = bisect(all, anchor-1)
+                    return all[i:i+count]
+        # Test for X-Y next
+        i = seq.find('-')
+        if i >= 0:
+            begin = self._parseindex(seq[:i], all)
+            end = self._parseindex(seq[i+1:], all)
+            i = bisect(all, begin-1)
+            j = bisect(all, end)
+            r = all[i:j]
+            if not r:
+                raise Error, "bad message list %s" % seq
+            return r
+        # Neither X:Y nor X-Y; must be a number or a (pseudo-)sequence
+        try:
+            n = self._parseindex(seq, all)
+        except Error, msg:
+            seqs = self.getsequences()
+            if not seq in seqs:
+                if not msg:
+                    msg = "bad message list %s" % seq
+                raise Error, msg
+            return seqs[seq]
+        else:
+            if n not in all:
+                if isnumeric(seq):
+                    raise Error, "message %d doesn't exist" % n
+                else:
+                    raise Error, "no %s message" % seq
+            else:
+                return [n]
+
+    def _parseindex(self, seq, all):
+        """Internal: parse a message number (or cur, first, etc.)."""
+        if isnumeric(seq):
+            try:
+                return int(seq)
+            except (OverflowError, ValueError):
+                return sys.maxint
+        if seq in ('cur', '.'):
+            return self.getcurrent()
+        if seq == 'first':
+            return all[0]
+        if seq == 'last':
+            return all[-1]
+        if seq == 'next':
+            n = self.getcurrent()
+            i = bisect(all, n)
+            try:
+                return all[i]
+            except IndexError:
+                raise Error, "no next message"
+        if seq == 'prev':
+            n = self.getcurrent()
+            i = bisect(all, n-1)
+            if i == 0:
+                raise Error, "no prev message"
+            try:
+                return all[i-1]
+            except IndexError:
+                raise Error, "no prev message"
+        raise Error, None
+
+    def openmessage(self, n):
+        """Open a message -- returns a Message object."""
+        return Message(self, n)
+
+    def removemessages(self, list):
+        """Remove one or more messages -- may raise os.error."""
+        errors = []
+        deleted = []
+        for n in list:
+            path = self.getmessagefilename(n)
+            commapath = self.getmessagefilename(',' + str(n))
+            try:
+                os.unlink(commapath)
+            except os.error:
+                pass
+            try:
+                os.rename(path, commapath)
+            except os.error, msg:
+                errors.append(msg)
+            else:
+                deleted.append(n)
+        if deleted:
+            self.removefromallsequences(deleted)
+        if errors:
+            if len(errors) == 1:
+                raise os.error, errors[0]
+            else:
+                raise os.error, ('multiple errors:', errors)
+
+    def refilemessages(self, list, tofolder, keepsequences=0):
+        """Refile one or more messages -- may raise os.error.
+        'tofolder' is an open folder object."""
+        errors = []
+        refiled = {}
+        for n in list:
+            ton = tofolder.getlast() + 1
+            path = self.getmessagefilename(n)
+            topath = tofolder.getmessagefilename(ton)
+            try:
+                os.rename(path, topath)
+            except os.error:
+                # Try copying
+                try:
+                    shutil.copy2(path, topath)
+                    os.unlink(path)
+                except (IOError, os.error), msg:
+                    errors.append(msg)
+                    try:
+                        os.unlink(topath)
+                    except os.error:
+                        pass
+                    continue
+            tofolder.setlast(ton)
+            refiled[n] = ton
+        if refiled:
+            if keepsequences:
+                tofolder._copysequences(self, refiled.items())
+            self.removefromallsequences(refiled.keys())
+        if errors:
+            if len(errors) == 1:
+                raise os.error, errors[0]
+            else:
+                raise os.error, ('multiple errors:', errors)
+
+    def _copysequences(self, fromfolder, refileditems):
+        """Helper for refilemessages() to copy sequences."""
+        fromsequences = fromfolder.getsequences()
+        tosequences = self.getsequences()
+        changed = 0
+        for name, seq in fromsequences.items():
+            try:
+                toseq = tosequences[name]
+                new = 0
+            except KeyError:
+                toseq = []
+                new = 1
+            for fromn, ton in refileditems:
+                if fromn in seq:
+                    toseq.append(ton)
+                    changed = 1
+            if new and toseq:
+                tosequences[name] = toseq
+        if changed:
+            self.putsequences(tosequences)
+
+    def movemessage(self, n, tofolder, ton):
+        """Move one message over a specific destination message,
+        which may or may not already exist."""
+        path = self.getmessagefilename(n)
+        # Open it to check that it exists
+        f = open(path)
+        f.close()
+        del f
+        topath = tofolder.getmessagefilename(ton)
+        backuptopath = tofolder.getmessagefilename(',%d' % ton)
+        try:
+            os.rename(topath, backuptopath)
+        except os.error:
+            pass
+        try:
+            os.rename(path, topath)
+        except os.error:
+            # Try copying
+            ok = 0
+            try:
+                tofolder.setlast(None)
+                shutil.copy2(path, topath)
+                ok = 1
+            finally:
+                if not ok:
+                    try:
+                        os.unlink(topath)
+                    except os.error:
+                        pass
+            os.unlink(path)
+        self.removefromallsequences([n])
+
+    def copymessage(self, n, tofolder, ton):
+        """Copy one message over a specific destination message,
+        which may or may not already exist."""
+        path = self.getmessagefilename(n)
+        # Open it to check that it exists
+        f = open(path)
+        f.close()
+        del f
+        topath = tofolder.getmessagefilename(ton)
+        backuptopath = tofolder.getmessagefilename(',%d' % ton)
+        try:
+            os.rename(topath, backuptopath)
+        except os.error:
+            pass
+        ok = 0
+        try:
+            tofolder.setlast(None)
+            shutil.copy2(path, topath)
+            ok = 1
+        finally:
+            if not ok:
+                try:
+                    os.unlink(topath)
+                except os.error:
+                    pass
+
+    def createmessage(self, n, txt):
+        """Create a message, with text from the open file txt."""
+        path = self.getmessagefilename(n)
+        backuppath = self.getmessagefilename(',%d' % n)
+        try:
+            os.rename(path, backuppath)
+        except os.error:
+            pass
+        ok = 0
+        BUFSIZE = 16*1024
+        try:
+            f = open(path, "w")
+            while 1:
+                buf = txt.read(BUFSIZE)
+                if not buf:
+                    break
+                f.write(buf)
+            f.close()
+            ok = 1
+        finally:
+            if not ok:
+                try:
+                    os.unlink(path)
+                except os.error:
+                    pass
+
+    def removefromallsequences(self, list):
+        """Remove one or more messages from all sequences (including last)
+        -- but not from 'cur'!!!"""
+        if hasattr(self, 'last') and self.last in list:
+            del self.last
+        sequences = self.getsequences()
+        changed = 0
+        for name, seq in sequences.items():
+            if name == 'cur':
+                continue
+            for n in list:
+                if n in seq:
+                    seq.remove(n)
+                    changed = 1
+                    if not seq:
+                        del sequences[name]
+        if changed:
+            self.putsequences(sequences)
+
+    def getlast(self):
+        """Return the last message number."""
+        if not hasattr(self, 'last'):
+            self.listmessages() # Set self.last
+        return self.last
+
+    def setlast(self, last):
+        """Set the last message number."""
+        if last is None:
+            if hasattr(self, 'last'):
+                del self.last
+        else:
+            self.last = last
+
+class Message(mimetools.Message):
+
+    def __init__(self, f, n, fp = None):
+        """Constructor."""
+        self.folder = f
+        self.number = n
+        if fp is None:
+            path = f.getmessagefilename(n)
+            fp = open(path, 'r')
+        mimetools.Message.__init__(self, fp)
+
+    def __repr__(self):
+        """String representation."""
+        return 'Message(%s, %s)' % (repr(self.folder), self.number)
+
+    def getheadertext(self, pred = None):
+        """Return the message's header text as a string.  If an
+        argument is specified, it is used as a filter predicate to
+        decide which headers to return (its argument is the header
+        name converted to lower case)."""
+        if pred is None:
+            return ''.join(self.headers)
+        headers = []
+        hit = 0
+        for line in self.headers:
+            if not line[0].isspace():
+                i = line.find(':')
+                if i > 0:
+                    hit = pred(line[:i].lower())
+            if hit: headers.append(line)
+        return ''.join(headers)
+
+    def getbodytext(self, decode = 1):
+        """Return the message's body text as string.  This undoes a
+        Content-Transfer-Encoding, but does not interpret other MIME
+        features (e.g. multipart messages).  To suppress decoding,
+        pass 0 as an argument."""
+        self.fp.seek(self.startofbody)
+        encoding = self.getencoding()
+        if not decode or encoding in ('', '7bit', '8bit', 'binary'):
+            return self.fp.read()
+        try:
+            from cStringIO import StringIO
+        except ImportError:
+            from StringIO import StringIO
+        output = StringIO()
+        mimetools.decode(self.fp, output, encoding)
+        return output.getvalue()
+
+    def getbodyparts(self):
+        """Only for multipart messages: return the message's body as a
+        list of SubMessage objects.  Each submessage object behaves
+        (almost) as a Message object."""
+        if self.getmaintype() != 'multipart':
+            raise Error, 'Content-Type is not multipart/*'
+        bdry = self.getparam('boundary')
+        if not bdry:
+            raise Error, 'multipart/* without boundary param'
+        self.fp.seek(self.startofbody)
+        mf = multifile.MultiFile(self.fp)
+        mf.push(bdry)
+        parts = []
+        while mf.next():
+            n = "%s.%r" % (self.number, 1 + len(parts))
+            part = SubMessage(self.folder, n, mf)
+            parts.append(part)
+        mf.pop()
+        return parts
+
+    def getbody(self):
+        """Return body, either a string or a list of messages."""
+        if self.getmaintype() == 'multipart':
+            return self.getbodyparts()
+        else:
+            return self.getbodytext()
+
+
+class SubMessage(Message):
+
+    def __init__(self, f, n, fp):
+        """Constructor."""
+        Message.__init__(self, f, n, fp)
+        if self.getmaintype() == 'multipart':
+            self.body = Message.getbodyparts(self)
+        else:
+            self.body = Message.getbodytext(self)
+        self.bodyencoded = Message.getbodytext(self, decode=0)
+            # XXX If this is big, should remember file pointers
+
+    def __repr__(self):
+        """String representation."""
+        f, n, fp = self.folder, self.number, self.fp
+        return 'SubMessage(%s, %s, %s)' % (f, n, fp)
+
+    def getbodytext(self, decode = 1):
+        if not decode:
+            return self.bodyencoded
+        if type(self.body) == type(''):
+            return self.body
+
+    def getbodyparts(self):
+        if type(self.body) == type([]):
+            return self.body
+
+    def getbody(self):
+        return self.body
+
+
+class IntSet:
+    """Class implementing sets of integers.
+
+    This is an efficient representation for sets consisting of several
+    continuous ranges, e.g. 1-100,200-400,402-1000 is represented
+    internally as a list of three pairs: [(1,100), (200,400),
+    (402,1000)].  The internal representation is always kept normalized.
+
+    The constructor has up to three arguments:
+    - the string used to initialize the set (default ''),
+    - the separator between ranges (default ',')
+    - the separator between begin and end of a range (default '-')
+    The separators must be strings (not regexprs) and should be different.
+
+    The tostring() function yields a string that can be passed to another
+    IntSet constructor; __repr__() is a valid IntSet constructor itself.
+    """
+
+    # XXX The default begin/end separator means that negative numbers are
+    #     not supported very well.
+    #
+    # XXX There are currently no operations to remove set elements.
+
+    def __init__(self, data = None, sep = ',', rng = '-'):
+        self.pairs = []
+        self.sep = sep
+        self.rng = rng
+        if data: self.fromstring(data)
+
+    def reset(self):
+        self.pairs = []
+
+    def __cmp__(self, other):
+        return cmp(self.pairs, other.pairs)
+
+    def __hash__(self):
+        return hash(self.pairs)
+
+    def __repr__(self):
+        return 'IntSet(%r, %r, %r)' % (self.tostring(), self.sep, self.rng)
+
+    def normalize(self):
+        self.pairs.sort()
+        i = 1
+        while i < len(self.pairs):
+            alo, ahi = self.pairs[i-1]
+            blo, bhi = self.pairs[i]
+            if ahi >= blo-1:
+                self.pairs[i-1:i+1] = [(alo, max(ahi, bhi))]
+            else:
+                i = i+1
+
+    def tostring(self):
+        s = ''
+        for lo, hi in self.pairs:
+            if lo == hi: t = repr(lo)
+            else: t = repr(lo) + self.rng + repr(hi)
+            if s: s = s + (self.sep + t)
+            else: s = t
+        return s
+
+    def tolist(self):
+        l = []
+        for lo, hi in self.pairs:
+            m = range(lo, hi+1)
+            l = l + m
+        return l
+
+    def fromlist(self, list):
+        for i in list:
+            self.append(i)
+
+    def clone(self):
+        new = IntSet()
+        new.pairs = self.pairs[:]
+        return new
+
+    def min(self):
+        return self.pairs[0][0]
+
+    def max(self):
+        return self.pairs[-1][-1]
+
+    def contains(self, x):
+        for lo, hi in self.pairs:
+            if lo <= x <= hi: return True
+        return False
+
+    def append(self, x):
+        for i in range(len(self.pairs)):
+            lo, hi = self.pairs[i]
+            if x < lo: # Need to insert before
+                if x+1 == lo:
+                    self.pairs[i] = (x, hi)
+                else:
+                    self.pairs.insert(i, (x, x))
+                if i > 0 and x-1 == self.pairs[i-1][1]:
+                    # Merge with previous
+                    self.pairs[i-1:i+1] = [
+                            (self.pairs[i-1][0],
+                             self.pairs[i][1])
+                          ]
+                return
+            if x <= hi: # Already in set
+                return
+        i = len(self.pairs) - 1
+        if i >= 0:
+            lo, hi = self.pairs[i]
+            if x-1 == hi:
+                self.pairs[i] = lo, x
+                return
+        self.pairs.append((x, x))
+
+    def addpair(self, xlo, xhi):
+        if xlo > xhi: return
+        self.pairs.append((xlo, xhi))
+        self.normalize()
+
+    def fromstring(self, data):
+        new = []
+        for part in data.split(self.sep):
+            list = []
+            for subp in part.split(self.rng):
+                s = subp.strip()
+                list.append(int(s))
+            if len(list) == 1:
+                new.append((list[0], list[0]))
+            elif len(list) == 2 and list[0] <= list[1]:
+                new.append((list[0], list[1]))
+            else:
+                raise ValueError, 'bad data passed to IntSet'
+        self.pairs = self.pairs + new
+        self.normalize()
+
+
+# Subroutines to read/write entries in .mh_profile and .mh_sequences
+
+def pickline(file, key, casefold = 1):
+    try:
+        f = open(file, 'r')
+    except IOError:
+        return None
+    pat = re.escape(key) + ':'
+    prog = re.compile(pat, casefold and re.IGNORECASE)
+    while 1:
+        line = f.readline()
+        if not line: break
+        if prog.match(line):
+            text = line[len(key)+1:]
+            while 1:
+                line = f.readline()
+                if not line or not line[0].isspace():
+                    break
+                text = text + line
+            return text.strip()
+    return None
+
+def updateline(file, key, value, casefold = 1):
+    try:
+        f = open(file, 'r')
+        lines = f.readlines()
+        f.close()
+    except IOError:
+        lines = []
+    pat = re.escape(key) + ':(.*)\n'
+    prog = re.compile(pat, casefold and re.IGNORECASE)
+    if value is None:
+        newline = None
+    else:
+        newline = '%s: %s\n' % (key, value)
+    for i in range(len(lines)):
+        line = lines[i]
+        if prog.match(line):
+            if newline is None:
+                del lines[i]
+            else:
+                lines[i] = newline
+            break
+    else:
+        if newline is not None:
+            lines.append(newline)
+    tempfile = file + "~"
+    f = open(tempfile, 'w')
+    for line in lines:
+        f.write(line)
+    f.close()
+    os.rename(tempfile, file)
+
+
+# Test program
+
+def test():
+    global mh, f
+    os.system('rm -rf $HOME/Mail/@test')
+    mh = MH()
+    def do(s): print s; print eval(s)
+    do('mh.listfolders()')
+    do('mh.listallfolders()')
+    testfolders = ['@test', '@test/test1', '@test/test2',
+                   '@test/test1/test11', '@test/test1/test12',
+                   '@test/test1/test11/test111']
+    for t in testfolders: do('mh.makefolder(%r)' % (t,))
+    do('mh.listsubfolders(\'@test\')')
+    do('mh.listallsubfolders(\'@test\')')
+    f = mh.openfolder('@test')
+    do('f.listsubfolders()')
+    do('f.listallsubfolders()')
+    do('f.getsequences()')
+    seqs = f.getsequences()
+    seqs['foo'] = IntSet('1-10 12-20', ' ').tolist()
+    print seqs
+    f.putsequences(seqs)
+    do('f.getsequences()')
+    for t in reversed(testfolders): do('mh.deletefolder(%r)' % (t,))
+    do('mh.getcontext()')
+    context = mh.getcontext()
+    f = mh.openfolder(context)
+    do('f.getcurrent()')
+    for seq in ('first', 'last', 'cur', '.', 'prev', 'next',
+                'first:3', 'last:3', 'cur:3', 'cur:-3',
+                'prev:3', 'next:3',
+                '1:3', '1:-3', '100:3', '100:-3', '10000:3', '10000:-3',
+                'all'):
+        try:
+            do('f.parsesequence(%r)' % (seq,))
+        except Error, msg:
+            print "Error:", msg
+        stuff = os.popen("pick %r 2>/dev/null" % (seq,)).read()
+        list = map(int, stuff.split())
+        print list, "<-- pick"
+    do('f.listmessages()')
+
+
+if __name__ == '__main__':
+    test()