21 files changed, 4890 insertions, 0 deletions
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..b0302ac
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,4 @@
+Plzip was written by Laszlo Ersek and Antonio Diaz Diaz.
+
+Plzip uses a simplified version of the LZMA algorithm.
+The original LZMA algorithm was designed by Igor Pavlov.
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..5b244d5
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,676 @@
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+ 
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+  
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..7009187
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1,21 @@
+2009-12-05  Antonio Diaz Diaz  <ant_diaz@teleline.es>
+
+	* Version 0.1 released.
+	* This version is based on llzip-0.03 (2009-11-21), written by
+	  Laszlo Ersek <lacos@caesar.elte.hu>.
+	  From llzip-0.03/README:
+
+            llzip is a hack on my lbzip2-0.17 release. I ripped out the
+            decompression stuff, and replaced the bzip2 compression with
+            the lzma compression from lzlib-0.7. llzip is mainly meant
+            as an assisted fork point for the lzip developers.
+            Nonetheless, I tried to review the diff against lbzip2-0.17
+            thoroughly, and I think llzip should be usable on its own
+            until something better appears on the net.
+
+
+Copyright (C) 2009 Antonio Diaz Diaz.
+
+This file is a collection of facts, and thus it is not copyrightable,
+but just in case, I give you unlimited permission to copy, distribute
+and modify it.
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..4c9cac5
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,57 @@
+Requirements
+------------
+You will need a C++ compiler and the lzlib compression library installed.
+I use gcc 4.3.4 and 3.3.6, but the code should compile with any
+standards compliant compiler.
+Gcc is available at http://gcc.gnu.org.
+Lzlib is available at http://www.nongnu.org/lzip/lzlib.html.
+
+
+Procedure
+---------
+1. Unpack the archive if you have not done so already:
+
+	lzip -cd plzip[version].tar.lz | tar -xf -
+or
+	gzip -cd plzip[version].tar.gz | tar -xf -
+
+This creates the directory ./plzip[version] containing the source from
+the main archive.
+
+2. Change to plzip directory and run configure.
+   (Try `configure --help' for usage instructions).
+
+	cd plzip[version]
+	./configure
+
+3. Run make.
+
+	make
+
+4. Optionally, type `make check' to run the tests that come with plzip.
+
+5. Type `make install' to install the program and any data files and
+   documentation.
+
+
+Another way
+-----------
+You can also compile plzip into a separate directory. To do this, you
+must use a version of `make' that supports the `VPATH' variable, such
+as GNU `make'. `cd' to the directory where you want the object files
+and executables to go and run the `configure' script. `configure'
+automatically checks for the source code in `.', in `..' and in the
+directory that `configure' is in.
+
+`configure' recognizes the option `--srcdir=DIR' to control where to
+look for the sources. Usually `configure' can determine that directory
+automatically.
+
+After running `configure', you can run `make' and `make install' as
+explained above.
+
+
+Copyright (C) 2009 Antonio Diaz Diaz.
+
+This file is free documentation: you have unlimited permission to copy,
+distribute and modify it.
diff --git a/Makefile.in b/Makefile.in
new file mode 100644
index 0000000..6f27327
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,107 @@
+
+DISTNAME = $(progname)-$(progversion)
+INSTALL = install
+INSTALL_PROGRAM = $(INSTALL) -p -m 755
+INSTALL_DATA = $(INSTALL) -p -m 644
+INSTALL_DIR = $(INSTALL) -d -m 755
+LIBS = -llz -lpthread
+SHELL = /bin/sh
+
+objs = arg_parser.o lacos_rbtree.o plzip.o main.o
+
+
+.PHONY : all install install-info install-man install-strip \
+         uninstall uninstall-info uninstall-man \
+         doc info man check dist clean distclean
+
+all : $(progname)
+
+$(progname) : $(objs)
+	$(CXX) $(LDFLAGS) -o $(progname) $(objs) $(LIBS)
+
+$(progname)_profiled : $(objs)
+	$(CXX) $(LDFLAGS) -pg -o $(progname)_profiled $(objs) $(LIBS)
+
+main.o : main.cc
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -DPROGVERSION=\"$(progversion)\" -c -o $@ $<
+
+%.o : %.cc
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
+
+$(objs)       : Makefile
+arg_parser.o  : arg_parser.h
+lacos_rbtree.o: lacos_rbtree.h
+main.o        : arg_parser.h main.h plzip.h
+plzip.o       : lacos_rbtree.h main.h plzip.h
+
+doc : info man
+
+info : $(VPATH)/doc/$(progname).info
+
+$(VPATH)/doc/$(progname).info : $(VPATH)/doc/$(progname).texinfo
+	cd $(VPATH)/doc && makeinfo $(progname).texinfo
+
+man : $(VPATH)/doc/$(progname).1
+
+$(VPATH)/doc/$(progname).1 : $(progname)
+	help2man -n 'data compressor based on the LZMA algorithm' \
+	  -o $(VPATH)/doc/$(progname).1 ./$(progname)
+
+Makefile : $(VPATH)/configure $(VPATH)/Makefile.in
+	./config.status
+
+check : all $(VPATH)/testsuite/check.sh
+	@$(VPATH)/testsuite/check.sh $(VPATH)/testsuite
+
+install : all install-info install-man
+	if test ! -d $(DESTDIR)$(bindir) ; then $(INSTALL_DIR) $(DESTDIR)$(bindir) ; fi
+	$(INSTALL_PROGRAM) ./$(progname) $(DESTDIR)$(bindir)/$(progname)
+
+install-info :
+	if test ! -d $(DESTDIR)$(infodir) ; then $(INSTALL_DIR) $(DESTDIR)$(infodir) ; fi
+	$(INSTALL_DATA) $(VPATH)/doc/$(progname).info $(DESTDIR)$(infodir)/$(progname).info
+	-install-info --info-dir=$(DESTDIR)$(infodir) $(DESTDIR)$(infodir)/$(progname).info
+
+install-man :
+	if test ! -d $(DESTDIR)$(mandir)/man1 ; then $(INSTALL_DIR) $(DESTDIR)$(mandir)/man1 ; fi
+	$(INSTALL_DATA) $(VPATH)/doc/$(progname).1 $(DESTDIR)$(mandir)/man1/$(progname).1
+
+install-strip : all
+	$(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' install
+
+uninstall : uninstall-info uninstall-man
+	-rm -f $(DESTDIR)$(bindir)/$(progname)
+
+uninstall-info :
+	-install-info --info-dir=$(DESTDIR)$(infodir) --remove $(DESTDIR)$(infodir)/$(progname).info
+	-rm -f $(DESTDIR)$(infodir)/$(progname).info
+
+uninstall-man :
+	-rm -f $(DESTDIR)$(mandir)/man1/$(progname).1
+
+dist :
+	ln -sf $(VPATH) $(DISTNAME)
+	tar -cvf $(DISTNAME).tar \
+	  $(DISTNAME)/AUTHORS \
+	  $(DISTNAME)/COPYING \
+	  $(DISTNAME)/ChangeLog \
+	  $(DISTNAME)/INSTALL \
+	  $(DISTNAME)/Makefile.in \
+	  $(DISTNAME)/NEWS \
+	  $(DISTNAME)/README \
+	  $(DISTNAME)/configure \
+	  $(DISTNAME)/doc/$(progname).1 \
+	  $(DISTNAME)/doc/$(progname).info \
+	  $(DISTNAME)/doc/$(progname).texinfo \
+	  $(DISTNAME)/testsuite/COPYING.lz \
+	  $(DISTNAME)/testsuite/check.sh \
+	  $(DISTNAME)/*.h \
+	  $(DISTNAME)/*.cc
+	rm -f $(DISTNAME)
+	lzip -v -9 $(DISTNAME).tar
+
+clean :
+	-rm -f $(progname) $(progname)_profiled $(objs)
+
+distclean : clean
+	-rm -f Makefile config.status *.tar *.tar.lz
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..5f057ce
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,3 @@
+Changes in version 0.1:
+
+Initial release.
diff --git a/README b/README
new file mode 100644
index 0000000..3f9893f
--- /dev/null
+++ b/README
@@ -0,0 +1,21 @@
+Description
+
+Plzip is a parallel version of the lzip data compressor. Currently only
+compression is performed in parallel. Parallel decompression is planned
+to be implemented soon.
+
+Lzip is a lossless data compressor based on the LZMA algorithm, with
+very safe integrity checking and a user interface similar to the one of
+gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses
+better than bzip2, which makes it well suited for software distribution
+and data archiving.
+
+
+Copyright (C) 2009 Antonio Diaz Diaz.
+
+This file is free documentation: you have unlimited permission to copy,
+distribute and modify it.
+
+The file Makefile.in is a data file used by configure to produce the
+Makefile. It has the same copyright owner and permissions that this
+file.
diff --git a/arg_parser.cc b/arg_parser.cc
new file mode 100644
index 0000000..b889e1a
--- /dev/null
+++ b/arg_parser.cc
@@ -0,0 +1,193 @@
+/*  Arg_parser - A POSIX/GNU command line argument parser.
+    Copyright (C) 2006, 2007, 2008, 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <cstring>
+#include <string>
+#include <vector>
+
+#include "arg_parser.h"
+
+
+bool Arg_parser::parse_long_option( const char * const opt, const char * const arg,
+                                    const Option options[], int & argind )
+  {
+  unsigned int len;
+  int index = -1;
+  bool exact = false, ambig = false;
+
+  for( len = 0; opt[len+2] && opt[len+2] != '='; ++len ) ;
+
+  // Test all long options for either exact match or abbreviated matches.
+  for( int i = 0; options[i].code != 0; ++i )
+    if( options[i].name && !std::strncmp( options[i].name, &opt[2], len ) )
+      {
+      if( std::strlen( options[i].name ) == len )	// Exact match found
+        { index = i; exact = true; break; }
+      else if( index < 0 ) index = i;		// First nonexact match found
+      else if( options[index].code != options[i].code ||
+               options[index].has_arg != options[i].has_arg )
+        ambig = true;			// Second or later nonexact match found
+      }
+
+  if( ambig && !exact )
+    {
+    error_ = "option `"; error_ += opt; error_ += "' is ambiguous";
+    return false;
+    }
+
+  if( index < 0 )		// nothing found
+    {
+    error_ = "unrecognized option `"; error_ += opt; error_ += '\'';
+    return false;
+    }
+
+  ++argind;
+  data.push_back( Record( options[index].code ) );
+
+  if( opt[len+2] )		// `--<long_option>=<argument>' syntax
+    {
+    if( options[index].has_arg == no )
+      {
+      error_ = "option `--"; error_ += options[index].name;
+      error_ += "' doesn't allow an argument";
+      return false;
+      }
+    if( options[index].has_arg == yes && !opt[len+3] )
+      {
+      error_ = "option `--"; error_ += options[index].name;
+      error_ += "' requires an argument";
+      return false;
+      }
+    data.back().argument = &opt[len+3];
+    return true;
+    }
+
+  if( options[index].has_arg == yes )
+    {
+    if( !arg || !arg[0] )
+      {
+      error_ = "option `--"; error_ += options[index].name;
+      error_ += "' requires an argument";
+      return false;
+      }
+    ++argind; data.back().argument = arg;
+    return true;
+    }
+
+  return true;
+  }
+
+
+bool Arg_parser::parse_short_option( const char * const opt, const char * const arg,
+                                     const Option options[], int & argind )
+  {
+  int cind = 1;			// character index in opt
+
+  while( cind > 0 )
+    {
+    int index = -1;
+    const unsigned char c = opt[cind];
+
+    if( c != 0 )
+      for( int i = 0; options[i].code; ++i )
+        if( c == options[i].code )
+          { index = i; break; }
+
+    if( index < 0 )
+      {
+      error_ = "invalid option -- "; error_ += c;
+      return false;
+      }
+
+    data.push_back( Record( c ) );
+    if( opt[++cind] == 0 ) { ++argind; cind = 0; }	// opt finished
+
+    if( options[index].has_arg != no && cind > 0 && opt[cind] )
+      {
+      data.back().argument = &opt[cind]; ++argind; cind = 0;
+      }
+    else if( options[index].has_arg == yes )
+      {
+      if( !arg || !arg[0] )
+        {
+        error_ = "option requires an argument -- "; error_ += c;
+        return false;
+        }
+      data.back().argument = arg; ++argind; cind = 0;
+      }
+    }
+  return true;
+  }
+
+
+Arg_parser::Arg_parser( const int argc, const char * const argv[],
+                        const Option options[], const bool in_order )
+  {
+  if( argc < 2 || !argv || !options ) return;
+
+  std::vector< std::string > non_options;	// skipped non-options
+  int argind = 1;				// index in argv
+
+  while( argind < argc )
+    {
+    const unsigned char ch1 = argv[argind][0];
+    const unsigned char ch2 = ( ch1 ? argv[argind][1] : 0 );
+
+    if( ch1 == '-' && ch2 )		// we found an option
+      {
+      const char * const opt = argv[argind];
+      const char * const arg = (argind + 1 < argc) ? argv[argind+1] : 0;
+      if( ch2 == '-' )
+        {
+        if( !argv[argind][2] ) { ++argind; break; }	// we found "--"
+        else if( !parse_long_option( opt, arg, options, argind ) ) break;
+        }
+      else if( !parse_short_option( opt, arg, options, argind ) ) break;
+      }
+    else
+      {
+      if( !in_order ) non_options.push_back( argv[argind++] );
+      else { data.push_back( Record() ); data.back().argument = argv[argind++]; }
+      }
+    }
+  if( error_.size() ) data.clear();
+  else
+    {
+    for( unsigned int i = 0; i < non_options.size(); ++i )
+      { data.push_back( Record() ); data.back().argument.swap( non_options[i] ); }
+    while( argind < argc )
+      { data.push_back( Record() ); data.back().argument = argv[argind++]; }
+    }
+  }
+
+
+Arg_parser::Arg_parser( const char * const opt, const char * const arg,
+                        const Option options[] )
+  {
+  if( !opt || !opt[0] || !options ) return;
+
+  if( opt[0] == '-' && opt[1] )		// we found an option
+    {
+    int argind = 1;			// dummy
+    if( opt[1] == '-' )
+      { if( opt[2] ) parse_long_option( opt, arg, options, argind ); }
+    else
+      parse_short_option( opt, arg, options, argind );
+    if( error_.size() ) data.clear();
+    }
+  else { data.push_back( Record() ); data.back().argument = opt; }
+  }
diff --git a/arg_parser.h b/arg_parser.h
new file mode 100644
index 0000000..fa6161b
--- /dev/null
+++ b/arg_parser.h
@@ -0,0 +1,95 @@
+/*  Arg_parser - A POSIX/GNU command line argument parser.
+    Copyright (C) 2006, 2007, 2008, 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*  Arg_parser reads the arguments in `argv' and creates a number of
+    option codes, option arguments and non-option arguments.
+
+    In case of error, `error' returns a non-empty error message.
+
+    `options' is an array of `struct Option' terminated by an element
+    containing a code which is zero. A null name means a short-only
+    option. A code value outside the unsigned char range means a
+    long-only option.
+
+    Arg_parser normally makes it appear as if all the option arguments
+    were specified before all the non-option arguments for the purposes
+    of parsing, even if the user of your program intermixed option and
+    non-option arguments. If you want the arguments in the exact order
+    the user typed them, call `Arg_parser' with `in_order' = true.
+
+    The argument `--' terminates all options; any following arguments are
+    treated as non-option arguments, even if they begin with a hyphen.
+
+    The syntax for optional option arguments is `-<short_option><argument>'
+    (without whitespace), or `--<long_option>=<argument>'.
+*/
+
+class Arg_parser
+  {
+public:
+  enum Has_arg { no, yes, maybe };
+
+  struct Option
+    {
+    int code;			// Short option letter or code ( code != 0 )
+    const char * name;		// Long option name (maybe null)
+    Has_arg has_arg;
+    };
+
+private:
+  struct Record
+    {
+    int code;
+    std::string argument;
+    Record( const int c = 0 ) : code( c ) {}
+    };
+
+  std::string error_;
+  std::vector< Record > data;
+
+  bool parse_long_option( const char * const opt, const char * const arg,
+                          const Option options[], int & argind );
+  bool parse_short_option( const char * const opt, const char * const arg,
+                           const Option options[], int & argind );
+
+public:
+  Arg_parser( const int argc, const char * const argv[],
+              const Option options[], const bool in_order = false );
+
+      // Restricted constructor. Parses a single token and argument (if any)
+  Arg_parser( const char * const opt, const char * const arg,
+              const Option options[] );
+
+  const std::string & error() const throw() { return error_; }
+
+      // The number of arguments parsed (may be different from argc)
+  int arguments() const throw() { return data.size(); }
+
+      // If code( i ) is 0, argument( i ) is a non-option.
+      // Else argument( i ) is the option's argument (or empty).
+  int code( const int i ) const throw()
+    {
+    if( i >= 0 && i < arguments() ) return data[i].code;
+    else return 0;
+    }
+
+  const std::string & argument( const int i ) const throw()
+    {
+    if( i >= 0 && i < arguments() ) return data[i].argument;
+    else return error_;
+    }
+  };
diff --git a/configure b/configure
new file mode 100755
index 0000000..6f18fa3
--- /dev/null
+++ b/configure
@@ -0,0 +1,213 @@
+#! /bin/sh
+# configure script for Plzip - A parallel version of the lzip data compressor
+# Copyright (C) 2009 Antonio Diaz Diaz.
+#
+# This configure script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+#
+# Date of this version: 2009-09-05
+
+args=
+no_create=
+progname=plzip
+progversion=0.1
+srctrigger=plzip.h
+
+# clear some things potentially inherited from environment.
+LC_ALL=C
+export LC_ALL
+srcdir=
+prefix=/usr/local
+exec_prefix='$(prefix)'
+bindir='$(exec_prefix)/bin'
+datadir='$(prefix)/share'
+infodir='$(datadir)/info'
+mandir='$(datadir)/man'
+sysconfdir='$(prefix)/etc'
+CC=
+CXX=
+CPPFLAGS=
+CFLAGS='-Wall -W -O2'
+CXXFLAGS='-Wall -W -O2'
+LDFLAGS=
+
+# Loop over all args
+while [ x"$1" != x ] ; do
+
+	# Get the first arg, and shuffle
+	option=$1
+	shift
+
+	# Add the argument quoted to args
+	args="${args} \"${option}\""
+
+	# Split out the argument for options that take them
+	case ${option} in
+	*=*) optarg=`echo ${option} | sed -e 's,^[^=]*=,,'` ;;
+	esac
+
+	# Process the options
+	case ${option} in
+	--help | --he* | -h)
+		echo "Usage: configure [options]"
+		echo
+		echo "Options: [defaults in brackets]"
+		echo "  -h, --help            display this help and exit"
+		echo "  -V, --version         output version information and exit"
+		echo "  --srcdir=DIR          find the sources in DIR [. or ..]"
+		echo "  --prefix=DIR          install into DIR [${prefix}]"
+		echo "  --exec-prefix=DIR     base directory for arch-dependent files [${exec_prefix}]"
+		echo "  --bindir=DIR          user executables directory [${bindir}]"
+		echo "  --datadir=DIR         base directory for doc and data [${datadir}]"
+		echo "  --infodir=DIR         info files directory [${infodir}]"
+		echo "  --mandir=DIR          man pages directory [${mandir}]"
+		echo "  --sysconfdir=DIR      read-only single-machine data directory [${sysconfdir}]"
+		echo "  CC=COMPILER           C compiler to use [gcc]"
+		echo "  CXX=COMPILER          C++ compiler to use [g++]"
+		echo "  CPPFLAGS=OPTIONS      command line options for the preprocessor [${CPPFLAGS}]"
+		echo "  CFLAGS=OPTIONS        command line options for the C compiler [${CFLAGS}]"
+		echo "  CXXFLAGS=OPTIONS      command line options for the C++ compiler [${CXXFLAGS}]"
+		echo "  LDFLAGS=OPTIONS       command line options for the linker [${LDFLAGS}]"
+		echo
+		exit 0 ;;
+	--version | --ve* | -V)
+		echo "Configure script for ${progname} version ${progversion}"
+		exit 0 ;;
+	--srcdir* | --sr*)
+		srcdir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--prefix* | --pr*)
+		prefix=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--exec-prefix* | --ex*)
+		exec_prefix=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--bindir* | --bi*)
+		bindir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--datadir* | --da*)
+		datadir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--infodir* | --in*)
+		infodir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--mandir* | --ma*)
+		mandir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--sysconfdir* | --sy*)
+		sysconfdir=`echo ${optarg} | sed -e 's,/$,,'` ;;
+	--no-create | --no-c*)
+		no_create=yes ;;
+
+	CC=*)       CC=${optarg} ;;
+	CXX=*)      CXX=${optarg} ;;
+	CPPFLAGS=*) CPPFLAGS=${optarg} ;;
+	CFLAGS=*)   CFLAGS=${optarg} ;;
+	CXXFLAGS=*) CXXFLAGS=${optarg} ;;
+	LDFLAGS=*)  LDFLAGS=${optarg} ;;
+
+	--* | *=* | *-*-*) ;;
+	*)
+		echo "configure: Unrecognized option: \"${option}\"; use --help for usage." 1>&2
+		exit 1 ;;
+	esac
+done
+
+# Find the source files, if location was not specified.
+srcdirtext=
+if [ x"${srcdir}" = x ] ; then
+	srcdirtext="or . or .." ; srcdir=.
+	if [ ! -r ${srcdir}/${srctrigger} ] ; then srcdir=.. ; fi
+	if [ ! -r ${srcdir}/${srctrigger} ] ; then
+		## the sed command below emulates the dirname command
+		srcdir=`echo $0 | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+	fi
+fi
+
+if [ ! -r ${srcdir}/${srctrigger} ] ; then
+	exec 1>&2
+	echo
+	echo "configure: Can't find sources in ${srcdir} ${srcdirtext}"
+	echo "configure: (At least ${srctrigger} is missing)."
+	exit 1
+fi
+
+# Set srcdir to . if that's what it is.
+if [ "`pwd`" = "`cd ${srcdir} ; pwd`" ] ; then srcdir=. ; fi
+
+# checking whether we are using GNU C.
+if [ x"${CC}" = x ] ; then		# Let the user override the test.
+	if [ -x /bin/gcc ] ||
+	   [ -x /usr/bin/gcc ] ||
+	   [ -x /usr/local/bin/gcc ] ; then
+		CC="gcc"
+	else
+		CC="cc"
+	fi
+fi
+
+# checking whether we are using GNU C++.
+if [ x"${CXX}" = x ] ; then		# Let the user override the test.
+	if [ -x /bin/g++ ] ||
+	   [ -x /usr/bin/g++ ] ||
+	   [ -x /usr/local/bin/g++ ] ; then
+		CXX="g++"
+	else
+		CXX="c++"
+	fi
+fi
+
+echo
+if [ x${no_create} = x ] ; then
+	echo "creating config.status"
+	rm -f config.status
+	cat > config.status << EOF
+#! /bin/sh
+# This file was generated automatically by configure. Do not edit.
+# Run this file to recreate the current configuration.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+exec /bin/sh $0 ${args} --no-create
+EOF
+	chmod +x config.status
+fi
+
+echo "creating Makefile"
+echo "VPATH = ${srcdir}"
+echo "prefix = ${prefix}"
+echo "exec_prefix = ${exec_prefix}"
+echo "bindir = ${bindir}"
+echo "datadir = ${datadir}"
+echo "infodir = ${infodir}"
+echo "mandir = ${mandir}"
+echo "sysconfdir = ${sysconfdir}"
+echo "CC = ${CC}"
+echo "CXX = ${CXX}"
+echo "CPPFLAGS = ${CPPFLAGS}"
+echo "CFLAGS = ${CFLAGS}"
+echo "CXXFLAGS = ${CXXFLAGS}"
+echo "LDFLAGS = ${LDFLAGS}"
+rm -f Makefile
+cat > Makefile << EOF
+# Makefile for Plzip - A parallel version of the lzip data compressor
+# Copyright (C) 2009 Antonio Diaz Diaz.
+# This file was generated automatically by configure. Do not edit.
+#
+# This Makefile is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+progname = ${progname}
+progversion = ${progversion}
+VPATH = ${srcdir}
+prefix = ${prefix}
+exec_prefix = ${exec_prefix}
+bindir = ${bindir}
+datadir = ${datadir}
+infodir = ${infodir}
+mandir = ${mandir}
+sysconfdir = ${sysconfdir}
+CC = ${CC}
+CXX = ${CXX}
+CPPFLAGS = ${CPPFLAGS}
+CFLAGS = ${CFLAGS}
+CXXFLAGS = ${CXXFLAGS}
+LDFLAGS = ${LDFLAGS}
+EOF
+cat ${srcdir}/Makefile.in >> Makefile
+
+echo "OK. Now you can run make."
diff --git a/doc/plzip.1 b/doc/plzip.1
new file mode 100644
index 0000000..4a812c0
--- /dev/null
+++ b/doc/plzip.1
@@ -0,0 +1,71 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.36.
+.TH PLZIP "1" "December 2009" "Plzip 0.1" "User Commands"
+.SH NAME
+Plzip \- data compressor based on the LZMA algorithm
+.SH SYNOPSIS
+.B plzip
+[\fIoptions\fR] [\fIfiles\fR]
+.SH DESCRIPTION
+Plzip \- A parallel version of the lzip data compressor.
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-V\fR, \fB\-\-version\fR
+output version information and exit
+.TP
+\fB\-c\fR, \fB\-\-stdout\fR
+send output to standard output
+.TP
+\fB\-d\fR, \fB\-\-decompress\fR
+decompress
+.TP
+\fB\-n\fR, \fB\-\-threads=\fR<n>
+set the number of (de)compression threads
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+suppress all messages
+.TP
+\fB\-t\fR, \fB\-\-test\fR
+test compressed file integrity
+.TP
+\fB\-v\fR, \fB\-\-verbose\fR
+be verbose (a 2nd \fB\-v\fR gives more)
+.TP
+\fB\-1\fR .. \fB\-9\fR
+set compression level [default 6]
+.TP
+\fB\-\-fast\fR
+alias for \fB\-1\fR
+.TP
+\fB\-\-best\fR
+alias for \fB\-9\fR
+.PP
+If no file names are given, plzip compresses or decompresses
+from standard input to standard output.
+Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,
+Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...
+.SH "REPORTING BUGS"
+Report bugs to lzip\-bug@nongnu.org
+Lzip home page: http://www.nongnu.org/lzip/lzip.html
+.SH COPYRIGHT
+Copyright \(co 2009 Laszlo Ersek.
+.br
+Copyright \(co 2009 Antonio Diaz Diaz.
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
+.br
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+.SH "SEE ALSO"
+The full documentation for
+.B Plzip
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B Plzip
+programs are properly installed at your site, the command
+.IP
+.B info Plzip
+.PP
+should give you access to the complete manual.
diff --git a/doc/plzip.info b/doc/plzip.info
new file mode 100644
index 0000000..68fa5fa
--- /dev/null
+++ b/doc/plzip.info
@@ -0,0 +1,303 @@
+This is plzip.info, produced by makeinfo version 4.13 from
+plzip.texinfo.
+
+INFO-DIR-SECTION Data Compression
+START-INFO-DIR-ENTRY
+* Plzip: (plzip).               Parallel version of the lzip data compressor
+END-INFO-DIR-ENTRY
+
+
+File: plzip.info,  Node: Top,  Next: Introduction,  Up: (dir)
+
+Plzip Manual
+************
+
+This manual is for Plzip (version 0.1, 5 December 2009).
+
+* Menu:
+
+* Introduction::	Purpose and features of plzip
+* Invoking Plzip::	Command line interface
+* File Format::		Detailed format of the compressed file
+* Problems::		Reporting bugs
+* Concept Index::	Index of concepts
+
+
+   Copyright (C) 2008, 2009 Antonio Diaz Diaz.
+
+   This manual is free documentation: you have unlimited permission to
+copy, distribute and modify it.
+
+
+File: plzip.info,  Node: Introduction,  Next: Invoking Plzip,  Prev: Top,  Up: Top
+
+1 Introduction
+**************
+
+Plzip is a parallel version of the lzip data compressor. Currently only
+compression is performed in parallel. Parallel decompression is planned
+to be implemented soon.
+
+   Lzip is a lossless data compressor based on the LZMA algorithm, with
+very safe integrity checking and a user interface similar to the one of
+gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses
+better than bzip2, which makes it well suited for software distribution
+and data archiving.
+
+   Plzip replaces every file given in the command line with a compressed
+version of itself, with the name "original_name.lz". Each compressed
+file has the same modification date, permissions, and, when possible,
+ownership as the corresponding original, so that these properties can be
+correctly restored at decompression time. Plzip is able to read from
+some types of non regular files if the `--stdout' option is specified.
+
+   If no file names are specified, plzip compresses (or decompresses)
+from standard input to standard output. In this case, plzip will
+decline to write compressed output to a terminal, as this would be
+entirely incomprehensible and therefore pointless.
+
+   Plzip will correctly decompress a file which is the concatenation of
+two or more compressed files. The result is the concatenation of the
+corresponding uncompressed files. Integrity testing of concatenated
+compressed files is also supported.
+
+   When decompressing, plzip attempts to guess the name for the
+decompressed file from that of the compressed file as follows:
+
+filename.lz    becomes   filename
+filename.tlz   becomes   filename.tar
+anyothername   becomes   anyothername.out
+
+   As a self-check for your protection, plzip stores in the member
+trailer the 32-bit CRC of the original data and the size of the
+original data, to make sure that the decompressed version of the data
+is identical to the original. This guards against corruption of the
+compressed data, and against undetected bugs in plzip (hopefully very
+unlikely). The chances of data corruption going undetected are
+microscopic, less than one chance in 4000 million for each member
+processed. Be aware, though, that the check occurs upon decompression,
+so it can only tell you that something is wrong. It can't help you
+recover the original uncompressed data.
+
+   Return values: 0 for a normal exit, 1 for environmental problems
+(file not found, invalid flags, I/O errors, etc), 2 to indicate a
+corrupt or invalid input file, 3 for an internal consistency error (eg,
+bug) which caused plzip to panic.
+
+
+File: plzip.info,  Node: Invoking Plzip,  Next: File Format,  Prev: Introduction,  Up: Top
+
+2 Invoking Plzip
+****************
+
+The format for running plzip is:
+
+     plzip [OPTIONS] [FILES]
+
+   Plzip supports the following options:
+
+`--help'
+`-h'
+     Print an informative help message describing the options and exit.
+
+`--version'
+`-V'
+     Print the version number of plzip on the standard output and exit.
+
+`--stdout'
+`-c'
+     Compress or decompress to standard output. Needed when reading
+     from a named pipe (fifo) or from a device.
+
+`--decompress'
+`-d'
+     Decompress.
+
+`--force'
+`-f'
+     Force overwrite of output file.
+
+`--keep'
+`-k'
+     Keep (don't delete) input files during compression or
+     decompression.
+
+`--match-length=LENGTH'
+`-m LENGTH'
+     Set the match length limit in bytes. Valid values range from 5 to
+     273.  Larger values usually give better compression ratios but
+     longer compression times.
+
+`--output=FILE'
+`-o FILE'
+     When reading from standard input and `--stdout' has not been
+     specified, use `FILE' as the virtual name of the uncompressed
+     file. This produces a file named `FILE' when decompressing, and a
+     file named `FILE.lz' when compressing.
+
+`--quiet'
+`-q'
+     Quiet operation. Suppress all messages.
+
+`--dictionary-size=SIZE'
+`-s SIZE'
+     Set the dictionary size limit in bytes. Valid values range from
+     4KiB to 512MiB. Note that dictionary sizes are quantized. If the
+     specified size does not match one of the valid sizes, it will be
+     rounded upwards.
+
+`--test'
+`-t'
+     Check integrity of the specified file(s), but don't decompress
+     them.  This really performs a trial decompression and throws away
+     the result.  Use `-tvv' or `-tvvv' to see information about the
+     file.
+
+`--verbose'
+`-v'
+     Verbose mode. Show the compression ratio for each file processed.
+     Further -v's increase the verbosity level.
+
+`-1 .. -9'
+     Set the compression parameters (dictionary size and match length
+     limit) as shown in the table below. Note that `-9' can be much
+     slower than `-1'. These options have no effect when decompressing.
+
+     Level   Dictionary size   Match length limit
+     -1      1MiB              10 bytes
+     -2      1MiB              12 bytes
+     -3      1MiB              17 bytes
+     -4      2MiB              26 bytes
+     -5      4MiB              44 bytes
+     -6      8MiB              80 bytes
+     -7      16MiB             108 bytes
+     -8      16MiB             163 bytes
+     -9      32MiB             273 bytes
+
+`--fast'
+`--best'
+     Aliases for GNU gzip compatibility.
+
+
+
+   Numbers given as arguments to options may be followed by a multiplier
+and an optional `B' for "byte".
+
+   Table of SI and binary prefixes (unit multipliers):
+
+Prefix   Value                     |   Prefix   Value
+k        kilobyte  (10^3 = 1000)   |   Ki       kibibyte (2^10 = 1024)
+M        megabyte  (10^6)          |   Mi       mebibyte (2^20)
+G        gigabyte  (10^9)          |   Gi       gibibyte (2^30)
+T        terabyte  (10^12)         |   Ti       tebibyte (2^40)
+P        petabyte  (10^15)         |   Pi       pebibyte (2^50)
+E        exabyte   (10^18)         |   Ei       exbibyte (2^60)
+Z        zettabyte (10^21)         |   Zi       zebibyte (2^70)
+Y        yottabyte (10^24)         |   Yi       yobibyte (2^80)
+
+
+File: plzip.info,  Node: File Format,  Next: Problems,  Prev: Invoking Plzip,  Up: Top
+
+3 File Format
+*************
+
+In the diagram below, a box like this:
++---+
+|   | <-- the vertical bars might be missing
++---+
+
+   represents one byte; a box like this:
++==============+
+|              |
++==============+
+
+   represents a variable number of bytes.
+
+
+   A lzip file consists of a series of "members" (compressed data sets).
+The members simply appear one after another in the file, with no
+additional information before, between, or after them.
+
+   Each member has the following structure:
++--+--+--+--+----+----+=============+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+| ID string | VN | DS | Lzma stream | CRC32 |   Data size   |  Member size  |
++--+--+--+--+----+----+=============+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+   All multibyte values are stored in little endian order.
+
+`ID string'
+     A four byte string, identifying the member type, with the value
+     "LZIP".
+
+`VN (version number, 1 byte)'
+     Just in case something needs to be modified in the future. Valid
+     values are 0 and 1. Version 0 files have only one member and lack
+     `Member size'.
+
+`DS (coded dictionary size, 1 byte)'
+     Bits 4-0 contain the base 2 logarithm of the base dictionary size.
+     Bits 7-5 contain the number of "wedges" to substract from the base
+     dictionary size to obtain the dictionary size. The size of a wedge
+     is (base dictionary size / 16).
+     Valid values for dictionary size range from 4KiB to 512MiB.
+
+`Lzma stream'
+     The lzma stream, finished by an end of stream marker. Uses default
+     values for encoder properties.
+
+`CRC32 (4 bytes)'
+     CRC of the uncompressed original data.
+
+`Data size (8 bytes)'
+     Size of the uncompressed original data.
+
+`Member size (8 bytes)'
+     Total size of the member, including header and trailer. This
+     facilitates safe recovery of undamaged members from multimember
+     files.
+
+
+
+File: plzip.info,  Node: Problems,  Next: Concept Index,  Prev: File Format,  Up: Top
+
+4 Reporting Bugs
+****************
+
+There are probably bugs in plzip. There are certainly errors and
+omissions in this manual. If you report them, they will get fixed. If
+you don't, no one will ever know about them and they will remain unfixed
+for all eternity, if not longer.
+
+   If you find a bug in plzip, please send electronic mail to
+<lzip-bug@nongnu.org>. Include the version number, which you can find
+by running `plzip --version'.
+
+
+File: plzip.info,  Node: Concept Index,  Prev: Problems,  Up: Top
+
+Concept Index
+*************
+
+
+* Menu:
+
+* bugs:                                  Problems.              (line 6)
+* file format:                           File Format.           (line 6)
+* getting help:                          Problems.              (line 6)
+* introduction:                          Introduction.          (line 6)
+* invoking:                              Invoking Plzip.        (line 6)
+* options:                               Invoking Plzip.        (line 6)
+* usage:                                 Invoking Plzip.        (line 6)
+* version:                               Invoking Plzip.        (line 6)
+
+
+
+Tag Table:
+Node: Top227
+Node: Introduction750
+Node: Invoking Plzip3401
+Node: File Format6746
+Node: Problems8702
+Node: Concept Index9231
+
+End Tag Table
diff --git a/doc/plzip.texinfo b/doc/plzip.texinfo
new file mode 100644
index 0000000..78ccce5
--- /dev/null
+++ b/doc/plzip.texinfo
@@ -0,0 +1,311 @@
+\input texinfo @c -*-texinfo-*-
+@c %**start of header
+@setfilename plzip.info
+@settitle Plzip Manual
+@finalout
+@c %**end of header
+
+@set UPDATED 5 December 2009
+@set VERSION 0.1
+
+@dircategory Data Compression
+@direntry
+* Plzip: (plzip).               Parallel version of the lzip data compressor
+@end direntry
+
+
+@titlepage
+@title Plzip
+@subtitle A data compressor based on the LZMA algorithm
+@subtitle for Plzip version @value{VERSION}, @value{UPDATED}
+@author by Antonio Diaz Diaz
+
+@page
+@vskip 0pt plus 1filll
+@end titlepage
+
+@contents
+
+@node Top
+@top
+
+This manual is for Plzip (version @value{VERSION}, @value{UPDATED}).
+
+@menu
+* Introduction::	Purpose and features of plzip
+* Invoking Plzip::	Command line interface
+* File Format::		Detailed format of the compressed file
+* Problems::		Reporting bugs
+* Concept Index::	Index of concepts
+@end menu
+
+@sp 1
+Copyright @copyright{} 2008, 2009 Antonio Diaz Diaz.
+
+This manual is free documentation: you have unlimited permission
+to copy, distribute and modify it.
+
+
+@node Introduction
+@chapter Introduction
+@cindex introduction
+
+Plzip is a parallel version of the lzip data compressor. Currently only
+compression is performed in parallel. Parallel decompression is planned
+to be implemented soon.
+
+Lzip is a lossless data compressor based on the LZMA algorithm, with
+very safe integrity checking and a user interface similar to the one of
+gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses
+better than bzip2, which makes it well suited for software distribution
+and data archiving.
+
+Plzip replaces every file given in the command line with a compressed
+version of itself, with the name "original_name.lz". Each compressed
+file has the same modification date, permissions, and, when possible,
+ownership as the corresponding original, so that these properties can be
+correctly restored at decompression time. Plzip is able to read from some
+types of non regular files if the @samp{--stdout} option is specified.
+
+If no file names are specified, plzip compresses (or decompresses) from
+standard input to standard output. In this case, plzip will decline to
+write compressed output to a terminal, as this would be entirely
+incomprehensible and therefore pointless.
+
+Plzip will correctly decompress a file which is the concatenation of two
+or more compressed files. The result is the concatenation of the
+corresponding uncompressed files. Integrity testing of concatenated
+compressed files is also supported.
+
+When decompressing, plzip attempts to guess the name for the decompressed
+file from that of the compressed file as follows:
+
+@multitable {anyothername} {becomes} {anyothername.out}
+@item filename.lz  @tab becomes @tab filename
+@item filename.tlz @tab becomes @tab filename.tar
+@item anyothername @tab becomes @tab anyothername.out
+@end multitable
+
+As a self-check for your protection, plzip stores in the member trailer
+the 32-bit CRC of the original data and the size of the original data,
+to make sure that the decompressed version of the data is identical to
+the original. This guards against corruption of the compressed data, and
+against undetected bugs in plzip (hopefully very unlikely). The chances
+of data corruption going undetected are microscopic, less than one
+chance in 4000 million for each member processed. Be aware, though, that
+the check occurs upon decompression, so it can only tell you that
+something is wrong. It can't help you recover the original uncompressed
+data.
+
+Return values: 0 for a normal exit, 1 for environmental problems (file
+not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or
+invalid input file, 3 for an internal consistency error (eg, bug) which
+caused plzip to panic.
+
+
+@node Invoking Plzip
+@chapter Invoking Plzip
+@cindex invoking
+@cindex options
+@cindex usage
+@cindex version
+
+The format for running plzip is:
+
+@example
+plzip [@var{options}] [@var{files}]
+@end example
+
+Plzip supports the following options:
+
+@table @samp
+@item --help
+@itemx -h
+Print an informative help message describing the options and exit.
+
+@item --version
+@itemx -V
+Print the version number of plzip on the standard output and exit.
+
+@item --stdout
+@itemx -c
+Compress or decompress to standard output. Needed when reading from a
+named pipe (fifo) or from a device.
+
+@item --decompress
+@itemx -d
+Decompress.
+
+@item --force
+@itemx -f
+Force overwrite of output file.
+
+@item --keep
+@itemx -k
+Keep (don't delete) input files during compression or decompression.
+
+@item --match-length=@var{length}
+@itemx -m @var{length}
+Set the match length limit in bytes. Valid values range from 5 to 273.
+Larger values usually give better compression ratios but longer
+compression times.
+
+@item --output=@var{file}
+@itemx -o @var{file}
+When reading from standard input and @samp{--stdout} has not been
+specified, use @samp{@var{file}} as the virtual name of the uncompressed
+file. This produces a file named @samp{@var{file}} when decompressing,
+and a file named @samp{@var{file}.lz} when compressing.
+
+@item --quiet
+@itemx -q
+Quiet operation. Suppress all messages.
+
+@item --dictionary-size=@var{size}
+@itemx -s @var{size}
+Set the dictionary size limit in bytes. Valid values range from 4KiB to
+512MiB. Note that dictionary sizes are quantized. If the specified size
+does not match one of the valid sizes, it will be rounded upwards.
+
+@item --test
+@itemx -t
+Check integrity of the specified file(s), but don't decompress them.
+This really performs a trial decompression and throws away the result.
+Use @samp{-tvv} or @samp{-tvvv} to see information about the file.
+
+@item --verbose
+@itemx -v
+Verbose mode. Show the compression ratio for each file processed.
+Further -v's increase the verbosity level.
+
+@item -1 .. -9
+Set the compression parameters (dictionary size and match length limit)
+as shown in the table below. Note that @samp{-9} can be much slower than
+@samp{-1}. These options have no effect when decompressing.
+
+@multitable {Level} {Dictionary size} {Match length limit}
+@item Level @tab Dictionary size @tab Match length limit
+@item -1 @tab  1MiB @tab  10 bytes
+@item -2 @tab  1MiB @tab  12 bytes
+@item -3 @tab  1MiB @tab  17 bytes
+@item -4 @tab  2MiB @tab  26 bytes
+@item -5 @tab  4MiB @tab  44 bytes
+@item -6 @tab  8MiB @tab  80 bytes
+@item -7 @tab 16MiB @tab 108 bytes
+@item -8 @tab 16MiB @tab 163 bytes
+@item -9 @tab 32MiB @tab 273 bytes
+@end multitable
+
+@item --fast
+@itemx --best
+Aliases for GNU gzip compatibility.
+
+@end table
+
+@sp 1
+Numbers given as arguments to options may be followed by a multiplier
+and an optional @samp{B} for "byte".
+
+Table of SI and binary prefixes (unit multipliers):
+
+@multitable {Prefix} {kilobyte  (10^3 = 1000)} {|} {Prefix} {kibibyte (2^10 = 1024)}
+@item Prefix @tab Value               @tab | @tab Prefix @tab Value
+@item k @tab kilobyte  (10^3 = 1000)  @tab | @tab Ki @tab kibibyte (2^10 = 1024)
+@item M @tab megabyte  (10^6)         @tab | @tab Mi @tab mebibyte (2^20)
+@item G @tab gigabyte  (10^9)         @tab | @tab Gi @tab gibibyte (2^30)
+@item T @tab terabyte  (10^12)        @tab | @tab Ti @tab tebibyte (2^40)
+@item P @tab petabyte  (10^15)        @tab | @tab Pi @tab pebibyte (2^50)
+@item E @tab exabyte   (10^18)        @tab | @tab Ei @tab exbibyte (2^60)
+@item Z @tab zettabyte (10^21)        @tab | @tab Zi @tab zebibyte (2^70)
+@item Y @tab yottabyte (10^24)        @tab | @tab Yi @tab yobibyte (2^80)
+@end multitable
+
+
+@node File Format
+@chapter File Format
+@cindex file format
+
+In the diagram below, a box like this:
+@verbatim
++---+
+|   | <-- the vertical bars might be missing
++---+
+@end verbatim
+
+represents one byte; a box like this:
+@verbatim
++==============+
+|              |
++==============+
+@end verbatim
+
+represents a variable number of bytes.
+
+@sp 1
+A lzip file consists of a series of "members" (compressed data sets).
+The members simply appear one after another in the file, with no
+additional information before, between, or after them.
+
+Each member has the following structure:
+@verbatim
++--+--+--+--+----+----+=============+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+| ID string | VN | DS | Lzma stream | CRC32 |   Data size   |  Member size  |
++--+--+--+--+----+----+=============+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+@end verbatim
+
+All multibyte values are stored in little endian order.
+
+@table @samp
+@item ID string
+A four byte string, identifying the member type, with the value "LZIP".
+
+@item VN (version number, 1 byte)
+Just in case something needs to be modified in the future. Valid values
+are 0 and 1. Version 0 files have only one member and lack @samp{Member
+size}.
+
+@item DS (coded dictionary size, 1 byte)
+Bits 4-0 contain the base 2 logarithm of the base dictionary size.@*
+Bits 7-5 contain the number of "wedges" to substract from the base
+dictionary size to obtain the dictionary size. The size of a wedge is
+(base dictionary size / 16).@*
+Valid values for dictionary size range from 4KiB to 512MiB.
+
+@item Lzma stream
+The lzma stream, finished by an end of stream marker. Uses default values
+for encoder properties.
+
+@item CRC32 (4 bytes)
+CRC of the uncompressed original data.
+
+@item Data size (8 bytes)
+Size of the uncompressed original data.
+
+@item Member size (8 bytes)
+Total size of the member, including header and trailer. This facilitates
+safe recovery of undamaged members from multimember files.
+
+@end table
+
+
+@node Problems
+@chapter Reporting Bugs
+@cindex bugs
+@cindex getting help
+
+There are probably bugs in plzip. There are certainly errors and
+omissions in this manual. If you report them, they will get fixed. If
+you don't, no one will ever know about them and they will remain unfixed
+for all eternity, if not longer.
+
+If you find a bug in plzip, please send electronic mail to
+@email{lzip-bug@@nongnu.org}. Include the version number, which you can
+find by running @w{@samp{plzip --version}}.
+
+
+@node Concept Index
+@unnumbered Concept Index
+
+@printindex cp
+
+@bye
diff --git a/lacos_rbtree.cc b/lacos_rbtree.cc
new file mode 100644
index 0000000..14404c0
--- /dev/null
+++ b/lacos_rbtree.cc
@@ -0,0 +1,418 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <cstddef>
+
+#include "lacos_rbtree.h"
+
+
+enum lacos_rbtree_color {
+    LACOS_RBTREE_RED,
+    LACOS_RBTREE_BLACK
+};
+
+struct lacos_rbtree_node {
+  void *data;
+  lacos_rbtree_node *parent,
+      *left,
+      *right;
+  lacos_rbtree_color color;
+};
+
+
+lacos_rbtree_node *
+lacos_rbtree_find( lacos_rbtree_node *root, const void *key,
+    int (*cmp)(const void *cmp_key, const void *cmp_data))
+{
+  int cmp_res;
+  while (root && (cmp_res = (*cmp)(key, root->data)))
+    root = cmp_res < 0 ? root->left : root->right;
+  return root;
+}
+
+
+lacos_rbtree_node *
+lacos_rbtree_min( lacos_rbtree_node *root)
+{
+  lacos_rbtree_node *tmp;
+
+  if (!root)
+    return 0;
+
+  while ((tmp = root->left))
+    root = tmp;
+
+  return root;
+}
+
+
+lacos_rbtree_node *
+lacos_rbtree_max( lacos_rbtree_node *root)
+{
+  lacos_rbtree_node *tmp;
+
+  if (!root)
+    return 0;
+
+  while ((tmp = root->right))
+    root = tmp;
+
+  return root;
+}
+
+
+lacos_rbtree_node *
+lacos_rbtree_next( lacos_rbtree_node *current)
+{
+  lacos_rbtree_node *tmp;
+
+  if (!current)
+    return 0;
+
+  if ((tmp = current->right)) {
+    while ((current = tmp->left))
+      tmp = current;
+    return tmp;
+  }
+
+  while ((tmp = current->parent) && current == tmp->right)
+    current = tmp;
+
+  return tmp;
+}
+
+
+lacos_rbtree_node *
+lacos_rbtree_prev( lacos_rbtree_node *current)
+{
+  lacos_rbtree_node *tmp;
+
+  if (!current)
+    return 0;
+
+  if ((tmp = current->left)) {
+    while ((current = tmp->right))
+      tmp = current;
+    return tmp;
+  }
+
+  while ((tmp = current->parent) && current == tmp->left)
+    current = tmp;
+
+  return tmp;
+}
+
+
+static void
+lacos_rbtree_rotate_left( lacos_rbtree_node **new_root,
+                          lacos_rbtree_node *rotation_root)
+{
+  lacos_rbtree_node
+      *parent = rotation_root->parent,
+      *rc = rotation_root->right,
+      *rlc = rc->left;
+
+  rotation_root->right = rlc;
+  if (rlc)
+    rlc->parent = rotation_root;
+  rc->parent = parent;
+  if (parent)
+    if (rotation_root == parent->left)
+      parent->left = rc;
+    else
+      parent->right = rc;
+  else
+    *new_root = rc;
+  rc->left = rotation_root;
+  rotation_root->parent = rc;
+}
+
+
+static void
+lacos_rbtree_rotate_right( lacos_rbtree_node **new_root,
+                           lacos_rbtree_node *rotation_root)
+{
+  lacos_rbtree_node
+      *parent = rotation_root->parent,
+      *lc = rotation_root->left,
+      *lrc = lc->right;
+
+  rotation_root->left = lrc;
+  if (lrc)
+    lrc->parent = rotation_root;
+  lc->parent = parent;
+  if (parent)
+    if (rotation_root == parent->left)
+      parent->left = lc;
+    else
+      parent->right = lc;
+  else
+    *new_root = lc;
+  lc->right = rotation_root;
+  rotation_root->parent = lc;
+}
+
+
+int
+lacos_rbtree_insert( lacos_rbtree_node **new_root,
+    lacos_rbtree_node **new_node, void *new_data,
+    int (*cmp)(const void *cmp_new_data, const void *cmp_data),
+    void *(*alloc)(size_t size, void *alloc_ctl), void *alloc_ctl)
+{
+  int cmp_res = 0;
+  lacos_rbtree_node *tmp = *new_root, *parent = 0;
+
+  while (tmp && (cmp_res = (*cmp)(new_data, tmp->data))) {
+    parent = tmp;
+    tmp = cmp_res < 0 ? tmp->left : tmp->right;
+  }
+
+  if (tmp) {
+    *new_node = tmp;
+    return -1;
+  }
+
+  if (!(*new_node = tmp = (lacos_rbtree_node *)(*alloc)(sizeof(lacos_rbtree_node),
+      alloc_ctl)))
+    return -1;
+
+  tmp->data = new_data;
+  tmp->parent = parent;
+  tmp->left = 0;
+  tmp->right = 0;
+  if (parent)
+    if (cmp_res < 0)
+      parent->left = tmp;
+    else
+      parent->right = tmp;
+  else {
+    *new_root = tmp;
+    tmp->color = LACOS_RBTREE_BLACK;
+    return 0;
+  }
+
+  {
+    lacos_rbtree_node *root = *new_root, *grandparent, *uncle;
+
+    tmp->color = LACOS_RBTREE_RED;
+
+    while (tmp != root && LACOS_RBTREE_RED == parent->color) {
+      grandparent = parent->parent;
+      if (parent == grandparent->left) {
+        uncle = grandparent->right;
+        if (uncle && LACOS_RBTREE_RED == uncle->color) {
+          parent->color = LACOS_RBTREE_BLACK;
+          uncle->color = LACOS_RBTREE_BLACK;
+          grandparent->color = LACOS_RBTREE_RED;
+          tmp = grandparent;
+          parent = tmp->parent;
+        }
+        else {
+          if (tmp == parent->right) {
+            tmp = parent;
+            lacos_rbtree_rotate_left(&root, tmp);
+            parent = tmp->parent;
+            grandparent = parent->parent;
+          }
+          parent->color = LACOS_RBTREE_BLACK;
+          grandparent->color = LACOS_RBTREE_RED;
+          lacos_rbtree_rotate_right(&root, grandparent);
+        }
+      }
+      else {
+        uncle = grandparent->left;
+        if (uncle && LACOS_RBTREE_RED == uncle->color) {
+          parent->color = LACOS_RBTREE_BLACK;
+          uncle->color = LACOS_RBTREE_BLACK;
+          grandparent->color = LACOS_RBTREE_RED;
+          tmp = grandparent;
+          parent = tmp->parent;
+        }
+        else {
+          if (tmp == parent->left) {
+            tmp = parent;
+            lacos_rbtree_rotate_right(&root, tmp);
+            parent = tmp->parent;
+            grandparent = parent->parent;
+          }
+          parent->color = LACOS_RBTREE_BLACK;
+          grandparent->color = LACOS_RBTREE_RED;
+          lacos_rbtree_rotate_left(&root, grandparent);
+        }
+      }
+    }
+
+    root->color = LACOS_RBTREE_BLACK;
+    *new_root = root;
+  }
+  return 0;
+}
+
+
+void
+lacos_rbtree_delete( lacos_rbtree_node **new_root,
+    lacos_rbtree_node *old_node, void **old_data,
+    void (*dealloc)(void *ptr, void *alloc_ctl), void *alloc_ctl)
+{
+  lacos_rbtree_node *child, *parent, *root = *new_root,
+      *old_node_left = old_node->left,
+      *old_node_right = old_node->right,
+      *old_node_parent = old_node->parent;
+  lacos_rbtree_color color_of_firstly_unlinked;
+
+  if (old_data)
+    *old_data = old_node->data;
+
+  if (old_node_left && old_node_right) {
+    lacos_rbtree_node
+        *to_relink = old_node_right,
+        *tmp = to_relink->left;
+
+    if (tmp) {
+      do {
+        to_relink = tmp;
+        tmp = tmp->left;
+      } while (tmp);
+      parent = to_relink->parent;
+      child = to_relink->right;
+      parent->left = child;
+      if (child)
+        child->parent = parent;
+      to_relink->right = old_node_right;
+      old_node_right->parent = to_relink;
+    }
+    else {
+      parent = old_node_right;
+      child = old_node_right->right;
+    }
+
+    to_relink->left = old_node_left;
+    old_node_left->parent = to_relink;
+
+    color_of_firstly_unlinked = to_relink->color;
+    to_relink->color = old_node->color;
+
+    to_relink->parent = old_node_parent;
+
+    if (old_node_parent)
+      if (old_node == old_node_parent->left)
+        old_node_parent->left = to_relink;
+      else
+        old_node_parent->right = to_relink;
+    else
+      root = to_relink;
+  }
+  else {
+    parent = old_node_parent;
+    child = old_node_left ? old_node_left : old_node_right;
+    color_of_firstly_unlinked = old_node->color;
+
+    if (child)
+      child->parent = parent;
+    if (old_node_parent)
+      if (old_node == old_node_parent->left)
+        old_node_parent->left = child;
+      else
+        old_node_parent->right = child;
+    else
+      root = child;
+  }
+
+  (*dealloc)(old_node, alloc_ctl);
+
+  if (LACOS_RBTREE_BLACK == color_of_firstly_unlinked) {
+    lacos_rbtree_node *brother, *left_nephew, *right_nephew;
+    int left_black, right_black;
+
+    while (child != root && (!child || LACOS_RBTREE_BLACK == child->color))
+      if (child == parent->left) {
+        brother = parent->right;
+        if (LACOS_RBTREE_RED == brother->color) {
+          brother->color = LACOS_RBTREE_BLACK;
+          parent->color = LACOS_RBTREE_RED;
+          lacos_rbtree_rotate_left(&root, parent);
+          brother = parent->right;
+        }
+        left_nephew = brother->left;
+        right_nephew = brother->right;
+        right_black = !right_nephew
+            || LACOS_RBTREE_BLACK == right_nephew->color;
+        if ((!left_nephew || LACOS_RBTREE_BLACK == left_nephew->color)
+            && right_black) {
+          brother->color = LACOS_RBTREE_RED;
+          child = parent;
+          parent = parent->parent;
+        }
+        else {
+          if (right_black) {
+            left_nephew->color = LACOS_RBTREE_BLACK;
+            brother->color = LACOS_RBTREE_RED;
+            lacos_rbtree_rotate_right(&root, brother);
+            brother = parent->right;
+            right_nephew = brother->right;
+          }
+          brother->color = parent->color;
+          parent->color = LACOS_RBTREE_BLACK;
+          right_nephew->color = LACOS_RBTREE_BLACK;
+          lacos_rbtree_rotate_left(&root, parent);
+          child = root;
+          break;
+        }
+      }
+      else {
+        brother = parent->left;
+        if (LACOS_RBTREE_RED == brother->color) {
+          brother->color = LACOS_RBTREE_BLACK;
+          parent->color = LACOS_RBTREE_RED;
+          lacos_rbtree_rotate_right(&root, parent);
+          brother = parent->left;
+        }
+        right_nephew = brother->right;
+        left_nephew = brother->left;
+        left_black = !left_nephew || LACOS_RBTREE_BLACK == left_nephew->color;
+        if ((!right_nephew || LACOS_RBTREE_BLACK == right_nephew->color)
+            && left_black) {
+          brother->color = LACOS_RBTREE_RED;
+          child = parent;
+          parent = parent->parent;
+        }
+        else {
+          if (left_black) {
+            right_nephew->color = LACOS_RBTREE_BLACK;
+            brother->color = LACOS_RBTREE_RED;
+            lacos_rbtree_rotate_left(&root, brother);
+            brother = parent->left;
+            left_nephew = brother->left;
+          }
+          brother->color = parent->color;
+          parent->color = LACOS_RBTREE_BLACK;
+          left_nephew->color = LACOS_RBTREE_BLACK;
+          lacos_rbtree_rotate_right(&root, parent);
+          child = root;
+          break;
+        }
+      }
+
+    if (child)
+      child->color = LACOS_RBTREE_BLACK;
+  }
+
+  *new_root = root;
+}
diff --git a/lacos_rbtree.h b/lacos_rbtree.h
new file mode 100644
index 0000000..1945233
--- /dev/null
+++ b/lacos_rbtree.h
@@ -0,0 +1,249 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+struct lacos_rbtree_node;
+/*
+  Opaque data type for red-black binary tree nodes. To get its data pointer,
+  cast a (struct lacos_rbtree_node *) object to (void **) and derefer it once.
+  Empty trees equal to (struct lacos_rbtree_node *)0.
+
+  This group of functions is generally not thread-safe (although it doesn't use
+  any static data), because the non-read-only operations must exclude all
+  operations on the same tree via external locking in a multi-threaded
+  environment.
+
+  If you want to alter the (your own) "key" field in an element, you mustn't do
+  that in one step. It must involve one delete and one insert operation, in the
+  order of your choice. Delete-insert is probably faster than insert-delete.
+*/
+
+
+/*
+  The functions below all return and mainly take pointers to nodes, not
+  elements (pointers to void). However, for simplicity of language, they are
+  described as if they operated on pointers to void (elements).
+*/
+
+
+lacos_rbtree_node *
+lacos_rbtree_find( lacos_rbtree_node *root, const void *key,
+    int (*cmp)(const void *cmp_key, const void *cmp_data));
+/*
+  USAGE:
+    Find an element in the tree.
+
+  ARGUMENTS:
+    root:
+      Root of the tree.
+
+    key:
+      This specifies which element should be found. This doesn't need to be an
+      element, it can be a standalone key too, if you write the "cmp" function
+      accordingly.
+
+    cmp:
+      A function which should return an integer less than, equal to, or greater
+      than zero if the "key" argument compares less than, equal to, or greater
+      than the currently inspected element in the tree.
+
+  RETURN VALUE:
+    If the key is found, this function returns the element (actually the
+    address of the containing node). If it is not found, 0 is returned.
+
+  READ-ONLY OPERATION:
+    Yes.
+*/
+
+
+lacos_rbtree_node *
+lacos_rbtree_min( lacos_rbtree_node *root);
+/*
+  USAGE:
+    Get the smallest element in the tree.
+
+  ARGUMENTS:
+    root:
+      Root of the tree.
+
+  RETURN VALUE:
+    If the tree is empty ("root" is null), 0 is returned. Otherwise, the
+    smallest element is returned.
+
+  READ-ONLY OPERATION:
+    Yes.
+*/
+
+
+lacos_rbtree_node *
+lacos_rbtree_max( lacos_rbtree_node *root);
+/*
+  USAGE:
+    Get the greatest element in the tree.
+
+  ARGUMENTS:
+    root:
+      Root of the tree.
+
+  RETURN VALUE:
+    If the tree is empty ("root" is null), 0 is returned. Otherwise, the
+    greatest element is returned.
+
+  READ-ONLY OPERATION:
+    Yes.
+*/
+
+
+lacos_rbtree_node *
+lacos_rbtree_next( lacos_rbtree_node *current);
+/*
+  USAGE:
+    Get the smallest element greater than "current".
+
+  ARGUMENTS:
+    current:
+      An element.
+
+  RETURN VALUE:
+    If "current" is null or the last element in the tree, 0 is returned.
+    Otherwise, the smallest element greater than "current" is returned.
+
+  READ-ONLY OPERATION:
+    Yes.
+*/
+
+
+lacos_rbtree_node *
+lacos_rbtree_prev( lacos_rbtree_node *current);
+/*
+  USAGE:
+    Get the greatest element smaller than "current".
+
+  ARGUMENTS:
+    current:
+      An element.
+
+  RETURN VALUE:
+    If "current" is null or the first element in the tree, 0 is returned.
+    Otherwise, the greatest element smaller than "current" is returned.
+
+  READ-ONLY OPERATION:
+    Yes.
+*/
+
+
+int
+lacos_rbtree_insert( lacos_rbtree_node **new_root,
+    lacos_rbtree_node **new_node, void *new_data,
+    int (*cmp)(const void *cmp_new_data, const void *cmp_data),
+    void *(*alloc)(size_t size, void *alloc_ctl), void *alloc_ctl);
+/*
+  USAGE:
+    Insert an element into the tree.
+
+  ARGUMENTS:
+    new_root:
+      Address of the tree's root; "*new_root" is the root of the tree. Both
+      input and output.
+
+    new_node:
+      Output only.
+
+    new_data:
+      The data to insert. This must not be a standalone key, this must be a
+      full element. It will only be linked in, not copied.
+
+    cmp:
+      A function which should return an integer less than, equal to, or greater
+      than zero if the "new_data" argument compares less than, equal to, or
+      greater than the currently inspected element in the tree.
+
+    alloc:
+      A memory allocator function whose externally observable behavior is
+      consistent with that of "malloc". It must work together with the
+      "dealloc" function passed to "lacos_rbtree_delete".
+
+    alloc_ctl:
+      A pointer to a custom data type to supply the "alloc" function with
+      optional auxiliary control information (arena etc).
+
+  RETURN VALUE:
+    If the insertion succeeds, 0 is returned, the new element is stored into
+    "*new_node", and "*new_root" is updated to the new root of the tree.
+
+    Otherwise, "*new_root" is not modified, and -1 is returned because of one
+    of the following errors:
+
+    - An element with a colliding key was found in the tree. In this case, the
+      colliding element is stored into "*new_node".
+    - There was not enough memory to allocate a new node object. In this case,
+      0 is stored into "*new_node".
+
+    Existing node pointers remain valid in any case.
+
+  READ-ONLY OPERATION:
+    No.
+*/
+
+
+void
+lacos_rbtree_delete( lacos_rbtree_node **new_root,
+    lacos_rbtree_node *old_node, void **old_data,
+    void (*dealloc)(void *ptr, void *alloc_ctl), void *alloc_ctl);
+/*
+  USAGE:
+    Remove an element from the tree.
+
+  ARGUMENTS:
+    new_root:
+      Address of the tree's root; "*new_root" is the root of the tree. Both
+      input and output.
+
+    old_node:
+      The element to remove. This must be a valid node pointer into the tree.
+
+    old_data:
+      The deleted element (the data of the deleted node, which was specified by
+      the "new_data" argument of the corresponding "lacos_rbtree_insert" call).
+      You could get the data also through "*(void **)old_node" before calling
+      this function. The data pointer of the node to delete is only accessed
+      and stored into "*old_data" if "old_data" is not 0.
+
+    dealloc:
+      A memory deallocator function whose externally observable behavior is
+      consistent with that of "free". It must work together with the "alloc"
+      function passed to "lacos_rbtree_insert".
+
+    alloc_ctl:
+      A pointer to a custom data type to supply the "dealloc" function with
+      optional auxiliary control information (arena etc).
+
+    Existing node pointers different from "old_node" remain valid.
+
+  READ-ONLY OPERATION:
+    No.
+*/
+
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/main.cc b/main.cc
new file mode 100644
index 0000000..b2bf014
--- /dev/null
+++ b/main.cc
@@ -0,0 +1,1300 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+    Return values: 0 for a normal exit, 1 for environmental problems
+    (file not found, invalid flags, I/O errors, etc), 2 to indicate a
+    corrupt or invalid input file, 3 for an internal consistency error
+    (eg, bug) which caused plzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <algorithm>
+#include <cassert>
+#include <cerrno>
+#include <climits>
+#include <csignal>
+#include <cstdarg>          /* va_list */
+#include <cstddef>
+#include <cstdio>           /* flockfile() */
+#include <cstdlib>
+#include <cstring>          /* strerror() */
+#include <string>
+#include <vector>
+#include <fcntl.h>           /* open() */
+#include <stdint.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#include <lzlib.h>
+
+#if CHAR_BIT != 8
+#  error "Environments where CHAR_BIT != 8 are not supported."
+#endif
+
+#include "arg_parser.h"
+#include "main.h"
+#include "plzip.h"
+
+#ifndef LLONG_MAX
+#define LLONG_MAX  0x7FFFFFFFFFFFFFFFLL
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN  (-LLONG_MAX - 1LL)
+#endif
+#ifndef ULLONG_MAX
+#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
+#endif
+
+void internal_error( const char * msg );
+int readblock( const int fd, char * buf, const int size ) throw();
+int writeblock( const int fd, const char * buf, const int size ) throw();
+
+
+namespace {
+
+const char * invocation_name = 0;
+const char * const Program_name    = "Plzip";
+const char * const program_name    = "plzip";
+const char * const program_year    = "2009";
+
+struct { const char * from; const char * to; } const known_extensions[] = {
+  { ".lz",  ""     },
+  { ".tlz", ".tar" },
+  { 0,      0      } };
+
+struct lzma_options
+  {
+  int dictionary_size;		// 4KiB..512MiB
+  int match_len_limit;		// 5..273
+  };
+
+enum Mode { m_compress = 0, m_decompress, m_test };
+
+std::string output_filename;
+int outhandle = -1;
+int verbosity = 0;
+bool delete_output_on_interrupt = false;
+
+class Pretty_print
+  {
+  const char * const stdin_name;
+  const unsigned int stdin_name_len;
+  unsigned int longest_name;
+  std::string name_;
+  mutable bool first_post;
+
+public:
+  Pretty_print( const std::vector< std::string > & filenames )
+    : stdin_name( "(stdin)" ), stdin_name_len( std::strlen( stdin_name ) ),
+      longest_name( 0 ), first_post( false )
+    {
+    for( unsigned int i = 0; i < filenames.size(); ++i )
+      {
+      const std::string & s = filenames[i];
+      const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() );
+      if( len > longest_name ) longest_name = len;
+      }
+    if( longest_name == 0 ) longest_name = stdin_name_len;
+    }
+
+  void set_name( const std::string & filename )
+    {
+    if( filename.size() && filename != "-" ) name_ = filename;
+    else name_ = stdin_name;
+    first_post = true;
+    }
+
+  void reset() const throw() { if( name_.size() ) first_post = true; }
+  const char * name() const throw() { return name_.c_str(); }
+  void operator()( const char * const msg = 0 ) const throw();
+  };
+
+
+void show_help() throw()
+  {
+  std::printf( "%s - A parallel version of the lzip data compressor.\n", Program_name );
+  std::printf( "\nUsage: %s [options] [files]\n", invocation_name );
+  std::printf( "\nOptions:\n" );
+  std::printf( "  -h, --help                 display this help and exit\n" );
+  std::printf( "  -V, --version              output version information and exit\n" );
+//  std::printf( "  -b, --member-size=<n>      set member size limit in bytes\n" );
+  std::printf( "  -c, --stdout               send output to standard output\n" );
+  std::printf( "  -d, --decompress           decompress\n" );
+//  std::printf( "  -f, --force                overwrite existing output files\n" );
+//  std::printf( "  -k, --keep                 keep (don't delete) input files\n" );
+//  std::printf( "  -m, --match-length=<n>     set match length limit in bytes [80]\n" );
+  std::printf( "  -n, --threads=<n>          set the number of (de)compression threads\n" );
+//  std::printf( "  -o, --output=<file>        if reading stdin, place the output into <file>\n" );
+  std::printf( "  -q, --quiet                suppress all messages\n" );
+//  std::printf( "  -s, --dictionary-size=<n>  set dictionary size limit in bytes [8MiB]\n" );
+//  std::printf( "  -S, --volume-size=<n>      set volume size limit in bytes\n" );
+  std::printf( "  -t, --test                 test compressed file integrity\n" );
+  std::printf( "  -v, --verbose              be verbose (a 2nd -v gives more)\n" );
+  std::printf( "  -1 .. -9                   set compression level [default 6]\n" );
+  std::printf( "      --fast                 alias for -1\n" );
+  std::printf( "      --best                 alias for -9\n" );
+  if( verbosity > 0 )
+    {
+    std::printf( "  -D, --debug=<level>        (0-3) print debug statistics to stderr\n" );
+    }
+  std::printf( "If no file names are given, %s compresses or decompresses\n", program_name );
+  std::printf( "from standard input to standard output.\n" );
+  std::printf( "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n" );
+  std::printf( "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n" );
+  std::printf( "\nReport bugs to lzip-bug@nongnu.org\n" );
+  std::printf( "Lzip home page: http://www.nongnu.org/lzip/lzip.html\n" );
+  }
+
+
+void show_version() throw()
+  {
+  std::printf( "%s %s\n", Program_name, PROGVERSION );
+  std::printf( "Copyright (C) 2009 Laszlo Ersek.\n" );
+  std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+  std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" );
+  std::printf( "This is free software: you are free to change and redistribute it.\n" );
+  std::printf( "There is NO WARRANTY, to the extent permitted by law.\n" );
+  }
+
+
+long long getnum( const char * ptr, const int bs = 0,
+                  const long long llimit = LLONG_MIN + 1,
+                  const long long ulimit = LLONG_MAX ) throw()
+  {
+  errno = 0;
+  char *tail;
+  long long result = strtoll( ptr, &tail, 0 );
+  if( tail == ptr )
+    {
+    show_error( "bad or missing numerical argument", 0, true );
+    std::exit( 1 );
+    }
+
+  if( !errno && tail[0] )
+    {
+    int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+    int exponent = 0;
+    bool bad_multiplier = false;
+    switch( tail[0] )
+      {
+      case ' ': break;
+      case 'b': if( bs > 0 ) { factor = bs; exponent = 1; }
+                else bad_multiplier = true;
+                break;
+      case 'Y': exponent = 8; break;
+      case 'Z': exponent = 7; break;
+      case 'E': exponent = 6; break;
+      case 'P': exponent = 5; break;
+      case 'T': exponent = 4; break;
+      case 'G': exponent = 3; break;
+      case 'M': exponent = 2; break;
+      case 'K': if( factor == 1024 ) exponent = 1; else bad_multiplier = true;
+                break;
+      case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
+                break;
+      default: bad_multiplier = true;
+      }
+    if( bad_multiplier )
+      {
+      show_error( "bad multiplier in numerical argument", 0, true );
+      std::exit( 1 );
+      }
+    for( int i = 0; i < exponent; ++i )
+      {
+      if( LLONG_MAX / factor >= llabs( result ) ) result *= factor;
+      else { errno = ERANGE; break; }
+      }
+    }
+  if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE;
+  if( errno )
+    {
+    show_error( "numerical argument out of limits" );
+    std::exit( 1 );
+    }
+  return result;
+  }
+
+
+int get_dict_size( const char * arg ) throw()
+  {
+  char *tail;
+  int bits = std::strtol( arg, &tail, 0 );
+  if( bits >= min_dictionary_bits && bits <= max_dictionary_bits && *tail == 0 )
+    return ( 1 << bits );
+  return getnum( arg, 0, min_dictionary_size, max_dictionary_size );
+  }
+
+
+int extension_index( const std::string & name ) throw()
+  {
+  for( int i = 0; known_extensions[i].from; ++i )
+    {
+    const std::string ext( known_extensions[i].from );
+    if( name.size() > ext.size() &&
+        name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
+      return i;
+    }
+  return -1;
+  }
+
+
+int open_instream( const std::string & name, struct stat * in_statsp,
+                   const Mode program_mode, const int eindex,
+                   const bool force, const bool to_stdout ) throw()
+  {
+  int inhandle = -1;
+  if( program_mode == m_compress && !force && eindex >= 0 )
+    {
+    if( verbosity >= 0 )
+      std::fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n",
+                    program_name, name.c_str(),
+                    known_extensions[eindex].from );
+    }
+  else
+    {
+    inhandle = open( name.c_str(), O_RDONLY );
+    if( inhandle < 0 )
+      {
+      if( verbosity >= 0 )
+        std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
+                      program_name, name.c_str(), std::strerror( errno ) );
+      }
+    else
+      {
+      const int i = fstat( inhandle, in_statsp );
+      const mode_t & mode = in_statsp->st_mode;
+      if( i < 0 || !( S_ISREG( mode ) || ( to_stdout &&
+                      ( S_ISFIFO( mode ) || S_ISSOCK( mode ) ||
+                        S_ISBLK( mode ) || S_ISCHR( mode ) ) ) ) )
+        {
+        if( verbosity >= 0 )
+          std::fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n",
+                        program_name, name.c_str(),
+                        to_stdout ? "" : " and `--stdout' was not specified" );
+        close( inhandle );
+        inhandle = -1;
+        }
+      }
+    }
+  return inhandle;
+  }
+
+
+void set_c_outname( const std::string & name ) throw()
+  {
+  output_filename = name;
+  output_filename += known_extensions[0].from;
+  }
+
+
+void set_d_outname( const std::string & name, const int i ) throw()
+  {
+  if( i >= 0 )
+    {
+    const std::string from( known_extensions[i].from );
+    if( name.size() > from.size() )
+      {
+      output_filename.assign( name, 0, name.size() - from.size() );
+      output_filename += known_extensions[i].to;
+      return;
+      }
+    }
+  output_filename = name; output_filename += ".out";
+  if( verbosity >= 0 )
+    std::fprintf( stderr, "%s: can't guess original name for `%s' -- using `%s'.\n",
+                  program_name, name.c_str(), output_filename.c_str() );
+  }
+
+
+bool open_outstream( const bool force ) throw()
+  {
+  if( force )
+    outhandle = open( output_filename.c_str(), O_CREAT | O_TRUNC | O_WRONLY,
+                      S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+  else outhandle = open( output_filename.c_str(), O_CREAT | O_EXCL | O_WRONLY,
+                         S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
+  if( outhandle < 0 )
+    {
+    if( errno == EEXIST ) outhandle = -2; else outhandle = -1;
+    if( verbosity >= 0 )
+      {
+      if( outhandle == -2 )
+        std::fprintf( stderr, "%s: Output file %s already exists, skipping.\n",
+                      program_name, output_filename.c_str() );
+      else
+        std::fprintf( stderr, "%s: Can't create output file `%s': %s.\n",
+                      program_name, output_filename.c_str(), std::strerror( errno ) );
+      }
+    }
+  return ( outhandle >= 0 );
+  }
+
+
+bool check_tty( const int inhandle, const Mode program_mode ) throw()
+  {
+  if( program_mode == m_compress && isatty( outhandle ) )
+    {
+    show_error( "I won't write compressed data to a terminal.", 0, true );
+    return false;
+    }
+  if( ( program_mode == m_decompress || program_mode == m_test ) &&
+      isatty( inhandle ) )
+    {
+    show_error( "I won't read compressed data from a terminal.", 0, true );
+    return false;
+    }
+  return true;
+  }
+
+
+void cleanup_and_fail( const int retval ) throw()
+  {
+  if( delete_output_on_interrupt )
+    {
+    if( verbosity >= 0 )
+      std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
+               program_name, output_filename.c_str() );
+    if( outhandle >= 0 ) { close( outhandle ); outhandle = -1; }
+    if( std::remove( output_filename.c_str() ) != 0 )
+      show_error( "WARNING: deletion of output file (apparently) failed." );
+    }
+  std::exit( retval );
+  }
+
+
+     // Set permissions, owner and times.
+void close_and_set_permissions( const struct stat * in_statsp, int * retvalp )
+  {
+  int tmp = 0;
+  if( in_statsp )
+    {
+    if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1;
+    if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
+    // fchown will in many cases return with EPERM, which can be safely ignored.
+    }
+  if( close( outhandle ) == 0 ) outhandle = -1;
+  else cleanup_and_fail( 1 );
+  delete_output_on_interrupt = false;
+  if( !in_statsp ) return;
+  if( !tmp )
+    {
+    struct utimbuf t;
+    t.actime = in_statsp->st_atime;
+    t.modtime = in_statsp->st_mtime;
+    if( utime( output_filename.c_str(), &t ) != 0 ) tmp = 1;
+    }
+  if( tmp )
+    {
+    if( tmp > *retvalp ) *retvalp = tmp;
+    show_error( "I can't change output file attributes." );
+    cleanup_and_fail( *retvalp );
+    }
+  }
+
+
+int decompress( const int inhandle, const Pretty_print & pp,
+                const bool testing )
+  {
+  void * decoder = LZ_decompress_open();
+  if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+    {
+    LZ_decompress_close( decoder );
+    pp( "not enough memory. Find a machine with more memory" );
+    return 1;
+    }
+  if( verbosity >= 1 ) pp();
+
+  const int in_buffer_size = 65536, out_buffer_size = 8 * in_buffer_size;
+  uint8_t in_buffer[in_buffer_size], out_buffer[out_buffer_size];
+  int in_pos = 0, in_stream_pos = 0;
+  bool finished = false;
+  while( true )
+    {
+    int in_size = 0;
+    if( !finished )
+      {
+      if( in_stream_pos == 0 )
+        in_stream_pos = readblock( inhandle, (char *)in_buffer, in_buffer_size );
+      if( in_pos < in_stream_pos )
+        {
+        in_size = LZ_decompress_write( decoder, in_buffer + in_pos, in_stream_pos - in_pos );
+        in_pos += in_size;
+        }
+      if( in_pos >= in_stream_pos )
+        {
+        if( in_stream_pos < in_buffer_size )
+          { finished = true; LZ_decompress_finish( decoder ); }
+        in_stream_pos = 0; in_pos = 0;
+        }
+      }
+    int out_size = LZ_decompress_read( decoder, out_buffer, out_buffer_size );
+//    std::fprintf( stderr, "%5d in_size, %6d out_size.\n", in_size, out_size );
+    if( out_size < 0 )
+      {
+      const LZ_errno lz_errno = LZ_decompress_errno( decoder );
+      if( lz_errno == LZ_header_error )
+        {
+        if( LZ_decompress_total_out_size( decoder ) > 0 )
+          break;				// trailing garbage
+        pp( "error reading member header" );
+        return 1;
+        }
+      if( lz_errno == LZ_mem_error )
+        {
+        pp( "not enough memory. Find a machine with more memory" );
+        return 1;
+        }
+      if( lz_errno == LZ_unexpected_eof )
+        {
+        if( verbosity >= 0 )
+          { pp();
+            std::fprintf( stderr, "file ends unexpectedly at pos %lld\n",
+                          LZ_decompress_total_in_size( decoder ) ); }
+        return 2;
+        }
+      pp(); show_error( "read error", errno ); return 1;
+      }
+    else if( out_size > 0 && outhandle >= 0 )
+      {
+      const int wr = writeblock( outhandle, (char *)out_buffer, out_size );
+      if( wr != out_size )
+        { pp(); show_error( "write error", errno ); return 1; }
+      }
+    if( LZ_decompress_finished( decoder ) == 1 ) break;
+    if( finished && in_size == 0 && out_size == 0 )
+      internal_error( "library error (LZ_decompress_read)" );
+    }
+  if( verbosity >= 1 )
+    { if( testing ) std::fprintf( stderr, "ok\n" );
+      else std::fprintf( stderr, "done\n" ); }
+  LZ_decompress_close( decoder );
+  return 0;
+  }
+
+
+extern "C" void signal_handler( int ) throw()
+  {
+  show_error( "Control-C or similar caught, quitting." );
+  cleanup_and_fail( 1 );
+  }
+
+
+void set_signals() throw()
+  {
+  signal( SIGHUP, signal_handler );
+  signal( SIGINT, signal_handler );
+  signal( SIGTERM, signal_handler );
+  }
+
+} // end namespace
+
+
+void Pretty_print::operator()( const char * const msg ) const throw()
+  {
+  if( verbosity >= 0 )
+    {
+    if( first_post )
+      {
+      first_post = false;
+      std::fprintf( stderr, "  %s: ", name_.c_str() );
+      for( unsigned int i = 0; i < longest_name - name_.size(); ++i )
+        std::fprintf( stderr, " " );
+      if( !msg ) std::fflush( stderr );
+      }
+    if( msg ) std::fprintf( stderr, "%s.\n", msg );
+    }
+  }
+
+
+/* Private stuff needed by fatal(). */
+static pthread_t main_thread;
+
+static pid_t pid;
+
+
+/* Public utility variables and functions. */
+void *(*mallocf)(size_t size);
+void (*freef)(void *ptr);
+
+
+/*
+  This can be called from any thread, main thread or sub-threads alike, since
+  they all call common helper functions that call fatal() in case of an error.
+*/
+void
+fatal(void)
+{
+  if( pthread_equal(pthread_self(), main_thread) )
+    cleanup_and_fail( 1 );
+  else
+    {
+    if (0 == kill(pid, SIGUSR1))
+      pthread_exit(0);
+    }
+  _exit(EXIT_FAILURE);
+}
+
+
+void
+fail(const char *fmt, int err, ...)
+{
+  va_list args;
+
+  /* Locking stderr should also protect strerror(). */
+  flockfile(stderr);
+  (void)fprintf(stderr, "%s: ", program_name);
+
+  va_start(args, err);
+  (void)vfprintf(stderr, fmt, args);
+  va_end(args);
+
+  (void)fprintf(stderr, ": %s\n", strerror(err));
+  funlockfile(stderr);
+  /* Stream stderr is never fully buffered originally. */
+  fatal();
+}
+
+
+void *
+xalloc(size_t size)
+{
+  void *ret = (*mallocf)(size);
+
+  if (0 == ret) {
+    fail("(*mallocf)()", errno);
+  }
+
+  return ret;
+}
+
+
+void
+xinit(Cond *cond)
+{
+  int ret;
+  pthread_mutexattr_t attr;
+
+  ret = pthread_mutexattr_init(&attr);
+  if (0 != ret) {
+    fail("pthread_mutexattr_init()", ret);
+  }
+
+  ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
+  if (0 != ret) {
+    fail("pthread_mutexattr_settype()", ret);
+  }
+
+  ret = pthread_mutex_init(&cond->lock, &attr);
+  if (0 != ret) {
+    fail("pthread_mutex_init()", ret);
+  }
+
+  ret = pthread_mutexattr_destroy(&attr);
+  if (0 != ret) {
+    fail("pthread_mutexattr_destroy()", ret);
+  }
+
+  ret = pthread_cond_init(&cond->cond, 0);
+  if (0 != ret) {
+    fail("pthread_cond_init()", ret);
+  }
+
+  cond->ccount = 0lu;
+  cond->wcount = 0lu;
+}
+
+
+void
+xdestroy(Cond *cond)
+{
+  int ret;
+
+  ret = pthread_cond_destroy(&cond->cond);
+  if (0 != ret) {
+    fail("pthread_cond_destroy()", ret);
+  }
+
+  ret = pthread_mutex_destroy(&cond->lock);
+  if (0 != ret) {
+    fail("pthread_mutex_destroy()", ret);
+  }
+}
+
+
+void
+xlock(Cond *cond)
+{
+  int ret;
+
+  ret = pthread_mutex_lock(&cond->lock);
+  if (0 != ret) {
+    fail("pthread_mutex_lock()", ret);
+  }
+}
+
+
+void
+xlock_pred(Cond *cond)
+{
+  xlock(cond);
+  ++cond->ccount;
+}
+
+
+void
+xunlock(Cond *cond)
+{
+  int ret;
+
+  ret = pthread_mutex_unlock(&cond->lock);
+  if (0 != ret) {
+    fail("pthread_mutex_unlock()", ret);
+  }
+}
+
+
+void
+xwait(Cond *cond)
+{
+  int ret;
+
+  ++cond->wcount;
+  ret = pthread_cond_wait(&cond->cond, &cond->lock);
+  if (0 != ret) {
+    fail("pthread_cond_wait()", ret);
+  }
+  ++cond->ccount;
+}
+
+
+void
+xsignal(Cond *cond)
+{
+  int ret;
+
+  ret = pthread_cond_signal(&cond->cond);
+  if (0 != ret) {
+    fail("pthread_cond_signal()", ret);
+  }
+}
+
+
+void
+xbroadcast(Cond *cond)
+{
+  int ret;
+
+  ret = pthread_cond_broadcast(&cond->cond);
+  if (0 != ret) {
+    fail("pthread_cond_broadcast()", ret);
+  }
+}
+
+
+void
+xcreate(pthread_t *thread, void *(*routine)(void *), void *arg)
+{
+  int ret;
+
+  ret = pthread_create(thread, 0, routine, arg);
+  if (0 != ret) {
+    fail("pthread_create()", ret);
+  }
+}
+
+
+void
+xjoin(pthread_t thread)
+{
+  int ret;
+
+  ret = pthread_join(thread, 0);
+  if (0 != ret) {
+    fail("pthread_join()", ret);
+  }
+}
+
+
+void
+xraise(int sig)
+{
+  if (-1 == kill(pid, sig)) {
+    fail("kill()", errno);
+  }
+}
+
+
+/* Private stuff part 2. */
+
+struct Opts
+{
+  unsigned num_worker;  /* Start this many worker threads. */
+  unsigned clidx;       /* Compression level index in [0u .. 8u]. */
+  int print_cctrs;      /* Print condition variable counters. */
+};
+
+/* Backlog factor for all workers together. */
+static const unsigned blf = 3u;
+
+/* Separator characters in environment variable values. No escaping. */
+static const char envsep[] = " \t";
+
+
+static void *
+trace_malloc(size_t size)
+{
+  void *ret;
+  int save_errno = 0;
+
+  ret = malloc(size);
+  if (0 == ret) {
+    save_errno = errno;
+  }
+
+  if (0 > fprintf(stderr, "%lu: malloc(%lu) == %p\n", (long unsigned)pid,
+      (long unsigned)size, ret)
+  ) {
+    fatal();
+  }
+
+  if (0 == ret) {
+    errno = save_errno;
+  }
+
+  return ret;
+}
+
+
+static void
+trace_free(void *ptr)
+{
+  if (0 > fprintf(stderr, "%lu: free(%p)\n", (long unsigned)pid, ptr)) {
+    fatal();
+  }
+  free(ptr);
+}
+
+
+static void
+xsigemptyset(sigset_t *set)
+{
+  if (-1 == sigemptyset(set)) {
+    fail("sigemptyset()", errno);
+  }
+}
+
+
+static void
+xsigaddset(sigset_t *set, int signo)
+{
+  if (-1 == sigaddset(set, signo)) {
+    fail("sigaddset()", errno);
+  }
+}
+
+
+static void
+xsigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+  int ret;
+
+  ret = pthread_sigmask(how, set, oset);
+  if (0 != ret) {
+    fail("pthread_sigmask()", ret);
+  }
+}
+
+
+static void
+xsigaction(int sig, void (*handler)(int))
+{
+  struct sigaction act;
+
+  act.sa_handler = handler;
+  xsigemptyset(&act.sa_mask);
+  act.sa_flags = 0;
+
+  if (-1 == sigaction(sig, &act, 0)) {
+    fail("sigaction()", errno);
+  }
+}
+
+
+enum caught_sig
+{
+  CS_INT = 1,
+  CS_TERM,
+  CS_USR1,
+  CS_USR2
+};
+
+static volatile sig_atomic_t caught_sig;
+
+
+static void
+sighandler(int sig)
+{
+  /* sig_atomic_t is nowhere required to be able to hold signal values. */
+  switch (sig) {
+    case SIGINT:
+      caught_sig = CS_INT;
+      break;
+
+    case SIGTERM:
+      caught_sig = CS_TERM;
+      break;
+
+    case SIGUSR1:
+      caught_sig = CS_USR1;
+      break;
+
+    case SIGUSR2:
+      caught_sig = CS_USR2;
+      break;
+
+    default:
+      assert(0);
+  }
+}
+
+
+static void
+process( const Opts *opts, unsigned num_slot,
+    int infd, int outfd, const Pretty_print & pp, const sigset_t *unblocked )
+{
+  /*
+    We could wait for signals with either sigwait() or sigsuspend(). SUSv2
+    states about sigwait() that its effect on signal actions is unspecified.
+    SUSv3 still claims the same.
+
+    The SUSv2 description of sigsuspend() talks about both the thread and the
+    whole process being suspended until a signal arrives, although thread
+    suspension seems much more likely from the wording. They note that they
+    filed a clarification request for this. SUSv3 cleans this up and chooses
+    thread suspension which was more logical anyway.
+
+    I favor sigsuspend() because I need to re-raise SIGTERM and SIGINT, and
+    unspecified action behavior with sigwait() seems messy.
+
+    13-OCT-2009 lacos
+  */
+
+  Plzip_arg muxer_arg;
+  pthread_t muxer;
+
+  if( verbosity >= 1 ) pp( "" );
+
+  muxer_arg.num_worker = opts->num_worker;
+  muxer_arg.num_slot = num_slot;
+  muxer_arg.clidx = opts->clidx;
+  muxer_arg.print_cctrs = opts->print_cctrs;
+  muxer_arg.infd = infd;
+  muxer_arg.outfd = outfd;
+  xcreate(&muxer, plzip_wrap, &muxer_arg);
+
+  /* Unblock signals, wait for them, then block them again. */
+  {
+    int ret = sigsuspend(unblocked);
+    assert(-1 == ret && EINTR == errno);
+  }
+
+  switch (caught_sig) {
+    case CS_INT:
+    case CS_TERM:	// FIXME remove output file
+      {
+        int sig;
+        sigset_t mask;
+
+        sig = (CS_INT == caught_sig) ? SIGINT : SIGTERM;
+        /*
+          We might have inherited a SIG_IGN from the parent, but that would
+          make no sense here. 24-OCT-2009 lacos
+        */
+        xsigaction(sig, SIG_DFL);
+        xraise(sig);
+
+        xsigemptyset(&mask);
+        xsigaddset(&mask, sig);
+        xsigmask(SIG_UNBLOCK, &mask, 0);
+      }
+      /*
+        We shouldn't reach this point, but if we do for some reason, fall
+        through.
+      */
+
+    case CS_USR1:
+      /* Error from a non-main thread via fatal(). */
+      fatal();
+
+    case CS_USR2:
+      /* Muxer thread joined other sub-threads and finished successfully. */
+      break;
+
+    default:
+      assert(0);
+  }
+
+  xjoin(muxer);
+}
+
+
+static void
+sigs_mod(int block_n_catch, sigset_t *oset)
+{
+  void (*handler)(int);
+
+  if (block_n_catch) {
+    sigset_t mask;
+
+    xsigemptyset(&mask);
+    xsigaddset(&mask, SIGINT);
+    xsigaddset(&mask, SIGTERM);
+    xsigaddset(&mask, SIGUSR1);
+    xsigaddset(&mask, SIGUSR2);
+    xsigmask(SIG_BLOCK, &mask, oset);
+
+    handler = sighandler;
+  }
+  else {
+    handler = SIG_DFL;
+  }
+
+  xsigaction(SIGINT,  handler);
+  xsigaction(SIGTERM, handler);
+  xsigaction(SIGUSR1, handler);
+  xsigaction(SIGUSR2, handler);
+
+  if (!block_n_catch) {
+    xsigmask(SIG_SETMASK, oset, 0);
+  }
+}
+
+
+void show_error( const char * msg, const int errcode, const bool help ) throw()
+  {
+  if( verbosity >= 0 )
+    {
+    if( msg && msg[0] != 0 )
+      {
+      std::fprintf( stderr, "%s: %s", program_name, msg );
+      if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
+      std::fprintf( stderr, "\n" );
+      }
+    if( help && invocation_name && invocation_name[0] != 0 )
+      std::fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name );
+    }
+  }
+
+
+void internal_error( const char * msg )
+  {
+  std::string s( "internal error: " ); s += msg;
+  show_error( s.c_str() );
+  std::exit( 3 );
+  }
+
+
+// Returns the number of bytes really read.
+// If (returned value < size) and (errno == 0), means EOF was reached.
+//
+int readblock( const int fd, char * buf, const int size ) throw()
+  {
+  int rest = size;
+  errno = 0;
+  while( rest > 0 )
+    {
+    errno = 0;
+    const int n = read( fd, buf + size - rest, rest );
+    if( n > 0 ) rest -= n;
+    else if( n == 0 ) break;
+    else if( errno != EINTR && errno != EAGAIN ) break;
+    }
+  return ( rest > 0 ) ? size - rest : size;
+  }
+
+
+// Returns the number of bytes really written.
+// If (returned value < size), it is always an error.
+//
+int writeblock( const int fd, const char * buf, const int size ) throw()
+  {
+  int rest = size;
+  errno = 0;
+  while( rest > 0 )
+    {
+    errno = 0;
+    const int n = write( fd, buf + size - rest, rest );
+    if( n > 0 ) rest -= n;
+    else if( errno && errno != EINTR && errno != EAGAIN ) break;
+    }
+  return ( rest > 0 ) ? size - rest : size;
+  }
+
+
+int main( const int argc, const char * argv[] )
+  {
+  Opts opts;
+  // Mapping from gzip/bzip2 style 1..9 compression modes
+  // to the corresponding LZMA compression modes.
+  const lzma_options option_mapping[] =
+    {
+    { 1 << 20,  10 },		// -1
+    { 1 << 20,  12 },		// -2
+    { 1 << 20,  17 },		// -3
+    { 1 << 21,  26 },		// -4
+    { 1 << 22,  44 },		// -5
+    { 1 << 23,  80 },		// -6
+    { 1 << 24, 108 },		// -7
+    { 1 << 24, 163 },		// -8
+    { 1 << 25, 273 } };		// -9
+  lzma_options encoder_options = option_mapping[5];	// default = "-6"
+  int inhandle = -1;
+  Mode program_mode = m_compress;
+  bool force = false;
+  bool keep_input_files = false;
+  bool to_stdout = false;
+  std::string input_filename;
+  std::string default_output_filename;
+  std::vector< std::string > filenames;
+  invocation_name = argv[0];
+
+  if( LZ_version()[0] != LZ_version_string[0] )
+    internal_error( "bad library version" );
+
+  main_thread = pthread_self();
+  pid = getpid();
+
+  mallocf = malloc;
+  freef = free;
+
+  xsigaction(SIGPIPE, SIG_IGN);
+  xsigaction(SIGXFSZ, SIG_IGN);
+
+  /* Effectuate option defaults. */
+  long max_worker = sysconf(_SC_THREAD_THREADS_MAX);
+  if (-1L == max_worker) {
+    max_worker = LONG_MAX;
+  }
+  if (UINT_MAX < (long unsigned)max_worker) {
+    max_worker = UINT_MAX;
+  }
+  if (UINT_MAX / blf < (unsigned)max_worker) {
+    max_worker = UINT_MAX / blf;
+  }
+  if ((size_t)-1 / sizeof(pthread_t) < (unsigned)max_worker) {
+    max_worker = (size_t)-1 / sizeof(pthread_t);
+  }
+
+  opts.num_worker = 0u;
+  opts.clidx = 5u;
+  opts.print_cctrs = 0;
+
+  const Arg_parser::Option options[] =
+    {
+    { '1', "fast",            Arg_parser::no  },
+    { '2',  0,                Arg_parser::no  },
+    { '3',  0,                Arg_parser::no  },
+    { '4',  0,                Arg_parser::no  },
+    { '5',  0,                Arg_parser::no  },
+    { '6',  0,                Arg_parser::no  },
+    { '7',  0,                Arg_parser::no  },
+    { '8',  0,                Arg_parser::no  },
+    { '9', "best",            Arg_parser::no  },
+    { 'b', "member-size",     Arg_parser::yes },
+    { 'c', "stdout",          Arg_parser::no  },
+    { 'd', "decompress",      Arg_parser::no  },
+    { 'D', "debug",           Arg_parser::yes },
+    { 'f', "force",           Arg_parser::no  },
+    { 'h', "help",            Arg_parser::no  },
+    { 'k', "keep",            Arg_parser::no  },
+    { 'm', "match-length",    Arg_parser::yes },
+    { 'n', "threads",         Arg_parser::yes },
+    { 'o', "output",          Arg_parser::yes },
+    { 'q', "quiet",           Arg_parser::no  },
+    { 's', "dictionary-size", Arg_parser::yes },
+    { 'S', "volume-size",     Arg_parser::yes },
+    { 't', "test",            Arg_parser::no  },
+    { 'v', "verbose",         Arg_parser::no  },
+    { 'V', "version",         Arg_parser::no  },
+    {  0 ,  0,                Arg_parser::no  } };
+
+  Arg_parser parser( argc, argv, options );
+  if( parser.error().size() )				// bad option
+    { show_error( parser.error().c_str(), 0, true ); return 1; }
+
+  int argind = 0;
+  for( ; argind < parser.arguments(); ++argind )
+    {
+    const int code = parser.code( argind );
+    if( !code ) break;					// no more options
+    const char * arg = parser.argument( argind ).c_str();
+    switch( code )
+      {
+      case '1': case '2': case '3':
+      case '4': case '5': case '6':
+      case '7': case '8': case '9':
+                opts.clidx = code - '1';
+                encoder_options = option_mapping[code-'1']; break;
+      case 'c': to_stdout = true; break;
+      case 'd': program_mode = m_decompress; break;
+      case 'D': { int debug_level = getnum( arg, 0, 0, 3 );
+                  if( debug_level & 1 ) opts.print_cctrs = 1;
+                  if( debug_level & 2 )
+                    { mallocf = trace_malloc; freef = trace_free; } }
+                break;
+      case 'f': force = true; break;
+      case 'h': show_help(); return 0;
+      case 'k': keep_input_files = true; break;
+      case 'm': encoder_options.match_len_limit =
+                getnum( arg, 0, 5, 273 ); break;
+      case 'o': default_output_filename = arg; break;
+      case 'n': opts.num_worker = getnum( arg, 0, 1, max_worker ); break;
+      case 'q': verbosity = -1; break;
+      case 's': encoder_options.dictionary_size = get_dict_size( arg );
+                break;
+      case 't': program_mode = m_test; break;
+      case 'v': if( verbosity < 4 ) ++verbosity; break;
+      case 'V': show_version(); return 0;
+      default : internal_error( "uncaught option" );
+      }
+    }
+
+  if( opts.num_worker <= 0 )
+    {
+#ifdef _SC_NPROCESSORS_ONLN
+    long num_online = sysconf( _SC_NPROCESSORS_ONLN );
+    if( num_online <= 0 )
+      {
+      show_error( "number of online processors unavailable.", 0, true );
+      fatal();
+      }
+    opts.num_worker = std::min( num_online, max_worker );
+#else
+    show_error( "number of (de)compression threads not set.", 0, true );
+    fatal();
+#endif
+    }
+  assert(UINT_MAX / blf >= opts.num_worker);
+  unsigned num_slot = opts.num_worker * blf;
+
+  bool filenames_given = false;
+  for( ; argind < parser.arguments(); ++argind )
+    {
+    if( parser.argument( argind ) != "-" ) filenames_given = true;
+    filenames.push_back( parser.argument( argind ) );
+    }
+
+  if( filenames.empty() ) filenames.push_back("-");
+  if( filenames_given && program_mode != m_compress ) set_signals();
+
+  Pretty_print pp( filenames );
+  if( program_mode == m_test )
+    outhandle = -1;
+
+  int retval = 0;
+  for( unsigned int i = 0; i < filenames.size(); ++i )
+    {
+    struct stat in_stats;
+    output_filename.clear();
+
+    if( !filenames[i].size() || filenames[i] == "-" )
+      {
+      input_filename.clear();
+      inhandle = STDIN_FILENO;
+      if( program_mode != m_test )
+        {
+        if( to_stdout || !default_output_filename.size() )
+          outhandle = STDOUT_FILENO;
+        else
+          {
+          if( program_mode == m_compress )
+            set_c_outname( default_output_filename );
+          else output_filename = default_output_filename;
+          if( !open_outstream( force ) )
+            {
+            if( outhandle == -1 && retval < 1 ) retval = 1;
+            close( inhandle ); inhandle = -1;
+            continue;
+            }
+          }
+        }
+      }
+    else
+      {
+      input_filename = filenames[i];
+      const int eindex = extension_index( input_filename );
+      inhandle = open_instream( input_filename, &in_stats, program_mode,
+                                eindex, force, to_stdout );
+      if( inhandle < 0 ) { if( retval < 1 ) retval = 1; continue; }
+      if( program_mode != m_test )
+        {
+        if( to_stdout ) outhandle = STDOUT_FILENO;
+        else
+          {
+          if( program_mode == m_compress )
+            set_c_outname( input_filename );
+          else set_d_outname( input_filename, eindex );
+          if( !open_outstream( force ) )
+            {
+            if( outhandle == -1 && retval < 1 ) retval = 1;
+            close( inhandle ); inhandle = -1;
+            continue;
+            }
+          }
+        }
+      }
+
+    if( !check_tty( inhandle, program_mode ) ) return 1;
+
+    if( output_filename.size() && !to_stdout && program_mode != m_test )
+      delete_output_on_interrupt = true;
+    const struct stat * in_statsp = input_filename.size() ? &in_stats : 0;
+    pp.set_name( input_filename );
+    int tmp = 0;
+    if( program_mode == m_compress )
+      {
+      sigset_t unblocked;
+      sigs_mod(1, &unblocked);
+      process( &opts, num_slot, inhandle, outhandle, pp, &unblocked );
+      sigs_mod(0, &unblocked);
+      }
+    else
+      tmp = decompress( inhandle, pp, program_mode == m_test );
+    if( tmp > retval ) retval = tmp;
+    if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
+
+    if( delete_output_on_interrupt )
+      close_and_set_permissions( in_statsp, &retval );
+    if( input_filename.size() )
+      {
+      close( inhandle ); inhandle = -1;
+      if( !keep_input_files && !to_stdout && program_mode != m_test )
+        std::remove( input_filename.c_str() );
+      }
+    }
+  if( outhandle >= 0 && close( outhandle ) != 0 )
+    {
+    if( verbosity >= 0 )
+      std::fprintf( stderr, "%s: Can't close stdout: %s.\n",
+                    program_name, std::strerror( errno ) );
+    if( retval < 1 ) retval = 1;
+    }
+  return retval;
+  }
diff --git a/main.h b/main.h
new file mode 100644
index 0000000..2f066cd
--- /dev/null
+++ b/main.h
@@ -0,0 +1,80 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+void show_error( const char * msg, const int errcode = 0, const bool help = false ) throw();
+extern void *(*mallocf)(size_t size);
+extern void (*freef)(void *ptr);
+
+
+struct Cond
+{
+  pthread_mutex_t lock; /* Lock this to protect shared resource. */
+  pthread_cond_t cond;  /* Trigger this if predicate becomes true. */
+  long unsigned ccount, /* Increment this when checking predicate. */
+      wcount;           /* Increment this when waiting is necessary. */
+};
+
+
+/* Terminate the process with EXIT_FAILURE. */
+void
+fatal(void);
+
+/* Format operation and append resolved error, then call fatal(). */
+void
+fail(const char *fmt, int err, ...)
+#ifdef __GNUC__
+__attribute__((format(printf, 1, 3)))
+#endif
+;
+
+/* If these primitives fail, they call fail(), which in turn calls fatal(). */
+void *
+xalloc(size_t size);
+
+void
+xinit(Cond *cond);
+
+void
+xdestroy(Cond *cond);
+
+void
+xlock(Cond *cond);
+
+void
+xlock_pred(Cond *cond);
+
+void
+xunlock(Cond *cond);
+
+void
+xwait(Cond *cond);
+
+void
+xsignal(Cond *cond);
+
+void
+xbroadcast(Cond *cond);
+
+void
+xcreate(pthread_t *thread, void *(*routine)(void *), void *arg);
+
+void
+xjoin(pthread_t thread);
+
+void
+xraise(int sig);
diff --git a/plzip.cc b/plzip.cc
new file mode 100644
index 0000000..f110437
--- /dev/null
+++ b/plzip.cc
@@ -0,0 +1,669 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <cassert>
+#include <cerrno>
+#include <climits>
+#include <csignal>
+#include <cstdio>
+#include <cstdlib>
+#include <stdint.h>
+#include <unistd.h>
+#include <lzlib.h>
+
+#include "main.h"
+#include "plzip.h"
+#include "lacos_rbtree.h"
+
+
+struct S2w_blk            /* Splitter to workers. */
+{
+  uint64_t id;            /* Block serial number as read from infd. */
+  S2w_blk *next;   /* Next in queue. */
+  size_t loaded;          /* # of bytes in plain, may be 0 for 1st. */
+  char unsigned plain[1]; /* Data read from infd, allocated: sizeof_plain. */
+};
+
+
+struct S2w_q
+{
+  Cond av_or_eof; /* New block available or splitter done. */
+  S2w_blk *tail,  /* Splitter will append here. */
+      *head;             /* Next ready worker shall compress this. */
+  int eof;               /* Splitter done. */
+};
+
+
+static void
+s2w_q_init(S2w_q *s2w_q)
+{
+  xinit(&s2w_q->av_or_eof);
+  s2w_q->tail = 0;
+  s2w_q->head = 0;
+  s2w_q->eof = 0;
+}
+
+
+static void
+s2w_q_uninit(S2w_q *s2w_q)
+{
+  assert(0 != s2w_q->eof);
+  assert(0 == s2w_q->head);
+  assert(0 == s2w_q->tail);
+  xdestroy(&s2w_q->av_or_eof);
+}
+
+
+struct W2m_blk            /* Workers to muxer. */
+{
+  uint64_t id;            /* Block index as read from infd. */
+  W2m_blk *next;   /* Next block in list (unordered). */
+  size_t produced;        /* Number of bytes in compr. */
+  char unsigned compr[1]; /* Data to write to outfd, alloc.: sizeof_compr. */
+};
+
+
+static int
+w2m_blk_cmp(const void *v_a, const void *v_b)
+{
+  uint64_t a,
+      b;
+
+  a = ((const W2m_blk *)v_a)->id;
+  b = ((const W2m_blk *)v_b)->id;
+
+  return
+        a < b ? -1
+      : a > b ?  1
+      : 0;
+}
+
+
+struct W2m_q
+{
+  Cond av_or_exit; /* New block available or all workers exited. */
+  uint64_t needed;        /* Block needed for resuming writing. */
+  W2m_blk *head;   /* Block list (unordered). */
+  unsigned working;       /* Number of workers still running. */
+};
+
+
+static void
+w2m_q_init(W2m_q *w2m_q, unsigned num_worker)
+{
+  assert(0u < num_worker);
+  xinit(&w2m_q->av_or_exit);
+  w2m_q->needed = 0u;
+  w2m_q->head = 0;
+  w2m_q->working = num_worker;
+}
+
+
+static void
+w2m_q_uninit(W2m_q *w2m_q)
+{
+  assert(0u == w2m_q->working);
+  assert(0 == w2m_q->head);
+  xdestroy(&w2m_q->av_or_exit);
+}
+
+
+struct M2s_q         /* Muxer to splitter. */
+{
+  Cond av;    /* Free slot available. */
+  unsigned num_free; /* Number of free slots. */
+};
+
+
+static void
+m2s_q_init(M2s_q *m2s_q, unsigned num_free)
+{
+  assert(0u < num_free);
+  xinit(&m2s_q->av);
+  m2s_q->num_free = num_free;
+}
+
+
+static void
+m2s_q_uninit(M2s_q *m2s_q, unsigned num_free)
+{
+  assert(m2s_q->num_free == num_free);
+  xdestroy(&m2s_q->av);
+}
+
+
+static void
+split(M2s_q *m2s_q, S2w_q *s2w_q, int infd,
+    const size_t sizeof_plain, const size_t sizeof_s2w_blk)
+{
+  uint64_t id;
+  ssize_t rd;
+
+  id = 0u;
+  do {
+    S2w_blk *s2w_blk;
+    size_t vacant;
+
+    /* Grab a free slot. */
+    xlock_pred(&m2s_q->av);
+    while (0u == m2s_q->num_free) {
+      xwait(&m2s_q->av);
+    }
+    --m2s_q->num_free;
+    xunlock(&m2s_q->av);
+    s2w_blk = (S2w_blk *)xalloc(sizeof_s2w_blk);
+
+    /* Fill block. */
+    vacant = sizeof_plain;
+    do {
+      rd = read(infd, s2w_blk->plain + (sizeof_plain - vacant),
+          vacant > (size_t)SSIZE_MAX ? (size_t)SSIZE_MAX : vacant);
+    } while (0 < rd && 0u < (vacant -= (size_t)rd));
+
+    /* Read error. */
+    if (-1 == rd) {
+      fail("read()", errno);
+    }
+
+    if (sizeof_plain == vacant && 0u < id) {
+      /* EOF on first read, but not for first input block. */
+      (*freef)(s2w_blk);
+      xlock(&m2s_q->av);
+      ++m2s_q->num_free;
+      xunlock(&m2s_q->av);
+    }
+    else {
+      s2w_blk->id = id;
+      s2w_blk->next = 0;
+      s2w_blk->loaded = sizeof_plain - vacant;
+    }
+
+    /* We either push a block, or set EOF, or both. */
+    assert(sizeof_plain > vacant || 0 == rd);
+
+    xlock(&s2w_q->av_or_eof);
+    if (0 == s2w_q->head) {
+      xbroadcast(&s2w_q->av_or_eof);
+    }
+
+    if (sizeof_plain > vacant || 0u == id) {
+      if (0 == s2w_q->tail) {
+        s2w_q->head = s2w_blk;
+      }
+      else {
+        s2w_q->tail->next = s2w_blk;
+      }
+      s2w_q->tail = s2w_blk;
+    }
+    s2w_q->eof = (0 == rd);
+    xunlock(&s2w_q->av_or_eof);
+
+    /*
+      If we didn't push a block, then this is bogus, but then we did set EOF,
+      so it doesn't matter, because we'll leave immediately.
+    */
+    ++id;
+  } while (0 < rd);
+}
+
+
+struct Split_arg
+{
+  M2s_q *m2s_q;
+  S2w_q *s2w_q;
+  int infd;
+  size_t sizeof_plain,
+      sizeof_S2w_blk;
+};
+
+
+static void *
+split_wrap(void *v_split_arg)
+{
+  Split_arg *split_arg = (Split_arg *)v_split_arg;
+
+  split(
+      split_arg->m2s_q,
+      split_arg->s2w_q,
+      split_arg->infd,
+      split_arg->sizeof_plain,
+      split_arg->sizeof_S2w_blk
+  );
+  return 0;
+}
+
+
+static void
+work_lz_rd(W2m_blk *w2m_blk, const size_t sizeof_compr, void *lz)
+{
+  int rd;
+
+  assert(w2m_blk->produced < sizeof_compr);
+  rd = LZ_compress_read(lz, w2m_blk->compr + w2m_blk->produced,
+      sizeof_compr - w2m_blk->produced);
+  if (-1 == rd) {
+    show_error( "LZ_compress_read() failed." );
+    fatal();
+  }
+  w2m_blk->produced += (size_t)rd;
+}
+
+
+struct Compr_lev
+{
+  unsigned dict_size,
+      mx_match;
+};
+
+
+static const Compr_lev compr_lev[] = {
+  {  1u * 1024u * 1024u,  10u },
+  {  1u * 1024u * 1024u,  12u },
+  {  1u * 1024u * 1024u,  17u },
+  {  2u * 1024u * 1024u,  26u },
+  {  4u * 1024u * 1024u,  44u },
+  {  8u * 1024u * 1024u,  80u },
+  { 16u * 1024u * 1024u, 108u },
+  { 16u * 1024u * 1024u, 163u },
+  { 32u * 1024u * 1024u, 273u }
+};
+
+
+static void
+work_compr(S2w_blk *s2w_blk, W2m_q *w2m_q, unsigned clidx,
+    const size_t sizeof_compr, const size_t sizeof_w2m_blk)
+{
+  W2m_blk *w2m_blk;
+
+  assert(0u < s2w_blk->loaded || 0u == s2w_blk->id);
+
+  w2m_blk = (W2m_blk *)xalloc(sizeof_w2m_blk);
+
+  /* Single member compression. Settings like with lzip -6. */
+  {
+    void *lz;
+    size_t written;
+
+    lz = LZ_compress_open(compr_lev[clidx].dict_size,
+        compr_lev[clidx].mx_match, (uint64_t)-1 / 2u);
+    if (LZ_ok != LZ_compress_errno(lz)) {
+      show_error( "LZ_compress_open() failed." );
+      fatal();
+    }
+
+    written = 0u;
+    w2m_blk->produced = 0u;
+    while (written < s2w_blk->loaded) {
+      int wr;
+
+      wr = LZ_compress_write(lz, s2w_blk->plain + written,
+          s2w_blk->loaded - written);
+      if (-1 == wr) {
+        show_error( "LZ_compress_write() failed." );
+        fatal();
+      }
+      written += (size_t)wr;
+
+      work_lz_rd(w2m_blk, sizeof_compr, lz);
+    }
+
+    if (-1 == LZ_compress_finish(lz)) {
+      show_error( "LZ_compress_finish() failed." );
+      fatal();
+    }
+
+    while (!LZ_compress_finished(lz)) {
+      work_lz_rd(w2m_blk, sizeof_compr, lz);
+    }
+
+    if (-1 == LZ_compress_close(lz)) {
+      show_error( "LZ_compress_close() failed." );
+      fatal();
+    }
+  }
+
+  w2m_blk->id = s2w_blk->id;
+
+  /* Push block to muxer. */
+  xlock(&w2m_q->av_or_exit);
+  w2m_blk->next = w2m_q->head;
+  w2m_q->head = w2m_blk;
+  if (w2m_blk->id == w2m_q->needed) {
+    xsignal(&w2m_q->av_or_exit);
+  }
+  xunlock(&w2m_q->av_or_exit);
+}
+
+
+static void
+work(S2w_q *s2w_q, W2m_q *w2m_q, unsigned clidx,
+    const size_t sizeof_compr, const size_t sizeof_w2m_blk)
+{
+  for (;;) {
+    S2w_blk *s2w_blk;
+
+    /* Grab a block to work on. */
+    xlock_pred(&s2w_q->av_or_eof);
+    while (0 == s2w_q->head && !s2w_q->eof) {
+      xwait(&s2w_q->av_or_eof);
+    }
+    if (0 == s2w_q->head) {
+      /* No blocks available and splitter exited. */
+      xunlock(&s2w_q->av_or_eof);
+      break;
+    }
+    s2w_blk = s2w_q->head;
+    s2w_q->head = s2w_blk->next;
+    if (0 == s2w_q->head) {
+      s2w_q->tail = 0;
+    }
+    xunlock(&s2w_q->av_or_eof);
+
+    work_compr(s2w_blk, w2m_q, clidx, sizeof_compr, sizeof_w2m_blk);
+    (*freef)(s2w_blk);
+  }
+
+  /* Notify muxer when last worker exits. */
+  xlock(&w2m_q->av_or_exit);
+  if (0u == --w2m_q->working && 0 == w2m_q->head) {
+    xsignal(&w2m_q->av_or_exit);
+  }
+  xunlock(&w2m_q->av_or_exit);
+}
+
+
+struct Work_arg
+{
+  S2w_q *s2w_q;
+  W2m_q *w2m_q;
+  unsigned clidx;
+  size_t sizeof_compr,
+      sizeof_W2m_blk;
+};
+
+
+static void *
+work_wrap(void *v_work_arg)
+{
+  Work_arg *work_arg;
+
+  work_arg = (Work_arg *)v_work_arg;
+  work(
+      work_arg->s2w_q,
+      work_arg->w2m_q,
+      work_arg->clidx,
+      work_arg->sizeof_compr,
+      work_arg->sizeof_W2m_blk
+  );
+  return 0;
+}
+
+
+static void *
+reord_alloc(size_t size, void *)
+{
+  return (*mallocf)(size);
+}
+
+
+static void
+reord_dealloc(void *ptr, void *)
+{
+  (*freef)(ptr);
+}
+
+
+static void
+mux_write(M2s_q *m2s_q, lacos_rbtree_node **reord,
+    uint64_t *reord_needed, int outfd)
+{
+  assert(0 != *reord);
+
+  /*
+    Go on until the tree becomes empty or the next block is found to be
+    missing.
+  */
+  do {
+    lacos_rbtree_node *reord_head;
+    W2m_blk *reord_w2m_blk;
+
+    reord_head = lacos_rbtree_min(*reord);
+    assert(0 != reord_head);
+
+    reord_w2m_blk = (W2m_blk *)(*(void **)reord_head);
+    if (reord_w2m_blk->id != *reord_needed) {
+      break;
+    }
+
+    /* Write out "reord_w2m_blk". */
+    if (-1 != outfd) {
+      char unsigned *cp;
+
+      cp = reord_w2m_blk->compr;
+      while (reord_w2m_blk->produced > 0u) {
+        ssize_t written;
+
+        written = write(outfd, cp, reord_w2m_blk->produced > (size_t)SSIZE_MAX
+            ? (size_t)SSIZE_MAX : reord_w2m_blk->produced);
+        if (-1 == written) {
+          fail("write()", errno);
+        }
+
+        reord_w2m_blk->produced -= (size_t)written;
+        cp += written;
+      }
+    }
+
+    ++*reord_needed;
+
+    xlock(&m2s_q->av);
+    if (0u == m2s_q->num_free++) {
+      xsignal(&m2s_q->av);
+    }
+    xunlock(&m2s_q->av);
+
+    lacos_rbtree_delete(
+        reord,         /* new_root */
+        reord_head,    /* old_node */
+        0,             /* old_data */
+        reord_dealloc, /* dealloc() */
+        0              /* alloc_ctl */
+    );
+
+    /* Release "reord_w2m_blk". */
+    (*freef)(reord_w2m_blk);
+  } while (0 != *reord);
+}
+
+
+static void
+mux(W2m_q *w2m_q, M2s_q *m2s_q, int outfd)
+{
+  lacos_rbtree_node *reord;
+  uint64_t reord_needed;
+
+  reord = 0;
+  reord_needed = 0u;
+
+  xlock_pred(&w2m_q->av_or_exit);
+  for (;;) {
+    W2m_blk *w2m_blk;
+
+    /* Grab all available compressed blocks in one step. */
+    while (0 == w2m_q->head && 0u < w2m_q->working) {
+      xwait(&w2m_q->av_or_exit);
+    }
+
+    if (0 == w2m_q->head) {
+      /* w2m_q is empty and all workers exited */
+      break;
+    }
+
+    w2m_blk = w2m_q->head;
+    w2m_q->head = 0;
+    xunlock(&w2m_q->av_or_exit);
+
+    /* Merge blocks fetched this time into tree. */
+    do {
+      lacos_rbtree_node *new_node;
+      W2m_blk *next;
+
+      if (-1 == lacos_rbtree_insert(
+          &reord,      /* new_root */
+          &new_node,   /* new_node */
+          w2m_blk,     /* new_data */
+          w2m_blk_cmp, /* cmp() */
+          reord_alloc, /* alloc() */
+          0            /* alloc_ctl */
+      )) {
+        /* id collision shouldn't happen */
+        assert(0 == new_node);
+        show_error( "lacos_rbtree_insert(): out of memory." );
+        fatal();
+      }
+
+      next = w2m_blk->next;
+      w2m_blk->next = 0;
+      w2m_blk = next;
+    } while (0 != w2m_blk);
+
+    /* Write out initial continuous sequence of reordered blocks. */
+    mux_write(m2s_q, &reord, &reord_needed, outfd);
+
+    xlock_pred(&w2m_q->av_or_exit);
+    w2m_q->needed = reord_needed;
+  }
+  xunlock(&w2m_q->av_or_exit);
+
+  assert(0 == reord);
+}
+
+
+static void
+plzip(unsigned num_worker, unsigned num_slot, unsigned clidx, int print_cctrs,
+    int infd, int outfd)
+{
+  S2w_q s2w_q;
+  W2m_q w2m_q;
+  M2s_q m2s_q;
+  Split_arg split_arg;
+  pthread_t splitter;
+  Work_arg work_arg;
+  pthread_t *worker;
+  unsigned i;
+
+  assert(clidx < sizeof compr_lev / sizeof compr_lev[0]);
+
+  s2w_q_init(&s2w_q);
+  w2m_q_init(&w2m_q, num_worker);
+  m2s_q_init(&m2s_q, num_slot);
+
+#define SIZES(struc, arr, arsz_unsigned, arg) \
+  do { \
+    unsigned tmp; \
+\
+    tmp = arsz_unsigned; \
+    if ((size_t)-1 < tmp) { \
+      show_error( "size_t overflow in sizeof_" #arr "." ); \
+      fatal(); \
+    } \
+    arg ## _arg . sizeof_ ## arr = tmp; \
+\
+    if ((size_t)-1 - sizeof(struc) \
+        < arg ## _arg . sizeof_ ## arr - (size_t)1) { \
+      show_error( "size_t overflow in sizeof_" #struc "." ); \
+      fatal(); \
+    } \
+    arg ## _arg . sizeof_ ## struc = sizeof(struc) \
+        + (arg ## _arg . sizeof_ ## arr - (size_t)1); \
+  } while (0)
+
+  split_arg.m2s_q = &m2s_q;
+  split_arg.s2w_q = &s2w_q;
+  split_arg.infd = infd;
+  SIZES(S2w_blk, plain, 2u * compr_lev[clidx].dict_size, split);
+  xcreate(&splitter, split_wrap, &split_arg);
+
+  work_arg.s2w_q = &s2w_q;
+  work_arg.w2m_q = &w2m_q;
+  work_arg.clidx = clidx;
+  SIZES(W2m_blk, compr, (4u + 1u + 1u)
+      + ((unsigned)split_arg.sizeof_plain * 9u + 7u) / 8u + (4u + 8u + 8u),
+      work);
+
+#undef SIZES
+
+  assert(0u < num_worker);
+  assert((size_t)-1 / sizeof *worker >= num_worker);
+  worker = (pthread_t *)xalloc(num_worker * sizeof *worker);
+  for (i = 0u; i < num_worker; ++i) {
+    xcreate(&worker[i], work_wrap, &work_arg);
+  }
+
+  mux(&w2m_q, &m2s_q, outfd);
+
+  i = num_worker;
+  do {
+    xjoin(worker[--i]);
+  } while (0u < i);
+  (*freef)(worker);
+
+  xjoin(splitter);
+
+  const int FW = ( sizeof(long unsigned) * 8 ) / 3 + 1;
+  if (print_cctrs && 0 > fprintf(stderr,
+      "any worker tried to consume from splitter: %*lu\n"
+      "any worker stalled                       : %*lu\n"
+      "muxer tried to consume from workers      : %*lu\n"
+      "muxer stalled                            : %*lu\n"
+      "splitter tried to consume from muxer     : %*lu\n"
+      "splitter stalled                         : %*lu\n",
+      FW, s2w_q.av_or_eof.ccount,
+      FW, s2w_q.av_or_eof.wcount,
+      FW, w2m_q.av_or_exit.ccount,
+      FW, w2m_q.av_or_exit.wcount,
+      FW, m2s_q.av.ccount,
+      FW, m2s_q.av.wcount) )
+  {
+    fatal();
+  }
+
+  m2s_q_uninit(&m2s_q, num_slot);
+  w2m_q_uninit(&w2m_q);
+  s2w_q_uninit(&s2w_q);
+}
+
+
+void *
+plzip_wrap(void *v_arg)
+{
+  Plzip_arg *arg = (Plzip_arg *)v_arg;
+  plzip(
+      arg->num_worker,
+      arg->num_slot,
+      arg->clidx,
+      arg->print_cctrs,
+      arg->infd,
+      arg->outfd
+  );
+
+  xraise(SIGUSR2);
+  return 0;
+}
diff --git a/plzip.h b/plzip.h
new file mode 100644
index 0000000..d59a90c
--- /dev/null
+++ b/plzip.h
@@ -0,0 +1,30 @@
+/*  Plzip - A parallel version of the lzip data compressor
+    Copyright (C) 2009 Laszlo Ersek.
+    Copyright (C) 2009 Antonio Diaz Diaz.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+struct Plzip_arg
+{
+  unsigned num_worker,
+      num_slot,
+      clidx;
+  int print_cctrs,
+      infd,
+      outfd;
+};
+
+void *
+plzip_wrap(void *v_arg);
diff --git a/testsuite/COPYING.lz b/testsuite/COPYING.lz
new file mode 100644
index 0000000..a09b1e8
--- /dev/null
+++ b/testsuite/COPYING.lz
diff --git a/testsuite/check.sh b/testsuite/check.sh
new file mode 100755
index 0000000..8a2ecd0
--- /dev/null
+++ b/testsuite/check.sh
@@ -0,0 +1,69 @@
+#! /bin/sh
+# check script for Plzip - A parallel version of the lzip data compressor
+# Copyright (C) 2009 Antonio Diaz Diaz.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute and modify it.
+
+LC_ALL=C
+export LC_ALL
+objdir=`pwd`
+testdir=`cd "$1" ; pwd`
+LZIP="${objdir}"/plzip
+framework_failure() { echo 'failure in testing framework'; exit 1; }
+
+if [ ! -x "${LZIP}" ] ; then
+	echo "${LZIP}: cannot execute"
+	exit 1
+fi
+
+if [ -d tmp ] ; then rm -rf tmp ; fi
+mkdir tmp
+echo -n "testing plzip..."
+cd "${objdir}"/tmp
+
+cat "${testdir}"/../COPYING > in || framework_failure
+fail=0
+
+"${LZIP}" -cd "${testdir}"/COPYING.lz > copy || fail=1
+cmp in copy || fail=1
+
+for i in s4096 1 2 3 4 5 6 7 8; do
+	"${LZIP}" -k -$i in || fail=1
+	mv -f in.lz copy.lz || fail=1
+	echo -n "garbage" >> copy.lz || fail=1
+	"${LZIP}" -df copy.lz || fail=1
+	cmp in copy || fail=1
+	echo -n .
+done
+
+for i in s4096 1 2 3 4 5 6 7 8; do
+	"${LZIP}" -c -$i in > out || fail=1
+	echo -n "g" >> out || fail=1
+	"${LZIP}" -cd out > copy || fail=1
+	cmp in copy || fail=1
+	echo -n .
+done
+
+for i in s4096 1 2 3 4 5 6 7 8; do
+	"${LZIP}" -c -$i < in > out || fail=1
+	"${LZIP}" -d < out > copy || fail=1
+	cmp in copy || fail=1
+	echo -n .
+done
+
+for i in s4096 1 2 3 4 5 6 7 8; do
+	"${LZIP}" -f -$i -o out < in || fail=1
+	"${LZIP}" -df -o copy < out.lz || fail=1
+	cmp in copy || fail=1
+	echo -n .
+done
+
+echo
+if [ ${fail} = 0 ] ; then
+	echo "tests completed successfully."
+	cd "${objdir}" && rm -r tmp
+else
+	echo "tests failed."
+fi
+exit ${fail}