//-------------------------------------------------------------------------------------------------
//Copyright 2016 David T. Ashley
//-------------------------------------------------------------------------------------------------
//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
//PUBLIC LICENSE, Version 3, full license text below.
//-------------------------------------------------------------------------------------------------
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//  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>.
//-------------------------------------------------------------------------------------------------
//This program, a PHP script, modifies all filenames in a directory to a canonical
//form (no upper-case letters or unusual characters).  This program is part of a
//3-program suite designed to collectively create a web page directly from
//digital camera files (and of course the web page can be customized by
//hand-editing after it is automatically generated).  The supported process for
//creating a web page involves 3 programs (rather than 1) primarily to circumvent
//the involuntary process termination that will occur in some shared environments
//if a process consumes too much CPU time.
//
//The 3 programs in the 3-program suite are:
//
//   filenames_canonize.php (this program):
//      Converts all names of files in a directory to lower-case, and makes
//      substitutions for any unusual characters.
//
//   thumbnails_make.php:
//      Creates thumbnails from recognized image types.  The thumbnails are
//      named relative to the original image file with the suffix "_small".
//      Only 20 files are converted on each invocation of the program, to
//      avoid the involuntary process termination that typically occurs in
//      a shared hosting environment when a process uses too much CPU time.
//      The program should be run repeatedly until it indicates that it has
//      no more thumbnails to create.
//
//      If any full-sized photos are modified, any corresponding thumbnails 
//      should be deleted and thumbnails_make.php and indexfile_make.php
//      should be run again.
//
//   indexfile_make.php
//      Scans a directory and makes an index file ("index2.php") displaying
//      all the thumbnail images, each of which link to the corresponding
//      full-sized image.  The index file is tailored to Dave Ashley's
//      needs, but the created file can be edited and most of the content
//      pasted into an HTML file.  To avoid the accidental loss of 
//      information, any existing "index2.php" file is renamed out of the
//      way.
//
//This script is designed to be run manually (rather than automatically invoked
//as a result of a web page request).  It was written in PHP for convenience
//simply because DreamHost (the web hosting company Dave Ashley uses) has as part
//of its hosting environment PHP with the ImageMagick library compiled in.
//
//Usually, this script is invoked using "php <path>/filenames_canonize.php", but
//the method of invocation may vary based on computing platform details.
//--------------------------------------------------------------------------------
//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.
//
//The GNU General Public License is reproduced below, and also is 
//available at http://www.gnu.org/licenses/.
//--------------------------------------------------------------------------------
//                    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.
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//   5. Conveying Modified Source Versions.
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//   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.
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//     d) If the work has interactive user interfaces, each must display
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// 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.
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//   6. Conveying Non-Source Forms.
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//   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,
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//     a) Convey the object code in, or embodied in, a physical product
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//     b) Convey the object code in, or embodied in, a physical product
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//     written offer, valid for at least three years and valid for as
//     long as you offer spare parts or customer support for that product
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//     copy of the Corresponding Source for all the software in the
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//     more than your reasonable cost of physically performing this
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//     Corresponding Source from a network server at no charge.
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//     c) Convey individual copies of the object code with a copy of the
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//
//     d) Convey the object code by offering access from a designated
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//     e) Convey the object code using peer-to-peer transmission, provided
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// included in conveying the object code work.
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//   A "User Product" is either (1) a "consumer product", which means any
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// modified object code on the User Product (for example, the work has
// been installed in ROM).
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// unpacking, reading or copying.
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//   7. Additional Terms.
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//   "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
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// this License without regard to the additional permissions.
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// add to a covered work, you may (if authorized by the copyright holders of
// that material) supplement the terms of this License with terms:
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//     terms of sections 15 and 16 of this License; or
//
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// received it, or any part of it, contains a notice stating that it is
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//   Moreover, your license from a particular copyright holder is
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//  A patent license is "discriminatory" if it does not include within
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// 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
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// 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.
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//   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.
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//   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.
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//   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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//   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.
//--------------------------------------------------------------------------------
<?php
//Defines the references
//
//Format is:
//  N/A:  Reference number is implicit ... it is array index+1.
//  a)Type of reference.  S=website, W=web page, B=book.
//  b)Reference tag (any combination of letters/numbers/underscores, no spaces, case sensitive).
//  c)Sort key.
//  d)Author names.
//  e)Book or website title.
//  f)Year of publication.
//  g)Book ISBN or similar.
//  h)Book or website URL.
//  i)Additional remarks about book or website.  May contain <br>, &quot;, &mdash;, &ndash;, <p>, </p>, <b>, </b>, <i>, and </i> only.
//
$GBL_REF_references = 
   array
      (
      array(
           "B", 
           "REF_B_BLACKJACKFORBLOOD",                        
           "Carlson, Bryce",                                                                                              
           "Bryce Carlson",                                                                                              
           "Blackjack for Blood: The Card-Counters' Bible, and Complete Winning Guide",
           "2010",
           "978-0935926231",
           "http://www.amazon.com/Blackjack-Blood-Card-Counters-Complete-Winning/dp/0935926232/",
           ""
           ),
      array(
           "S", 
           "REF_S_BLACKJACKINFO_COM",                        
           "Smith, Ken",                                                                                              
           "Ken Smith",                                                                                              
           "Blackjackinfo.com",
           "",
           "",
           "http://www.blackjackinfo.com",
           ""
           ),
      );


//Displays effectively list of references.
function GBL_REF_ref_enum()
   {
   global $GBL_REF_references;

   $col1width=15;
   $col2width=85;

   echo "<table width=\"100%\" border=\"3\" align=\"center\">\n";

   echo "   <tr>\n";
   echo "      <td align=\"center\" width=\"" . $col1width . "%\">\n";
   echo "         &nbsp;<b>Reference Number</b>&nbsp;\n";
   echo "      </td>\n";
   echo "      <td width=\"" . $col2width . "%\">\n";
   echo "         <b>Description</b>\n";
   echo "      </td>\n";
   echo "   </tr>\n";

   for ($i=0; $i<count($GBL_REF_references); $i++)
      {
      $elem = $GBL_REF_references[$i];

      echo "   <tr>\n";
      echo "      <td align=\"center\" width=\"" . $col1width . "%\">\n";
      echo "         &nbsp;[" . ($i+1) . "]&nbsp;\n";
      echo "      </td>\n";
      echo "      <td width=\"" . $col2width . "%\">\n";
      if ($elem[0] == "B")
         {
         echo $elem[3] . ",&nbsp; ";
         if ($elem[7] != "")
            {
            echo "<a href=\"" . $elem[7] . "\" target=\"_blank\">";
            }
         echo "<i>";
         echo $elem[4];
         if ($elem[5] != "")
            {
            echo " (" . $elem[5] . ")";
            }
         echo "</i>";
         if ($elem[7] != "")
            {
            echo "</a>";
            }
         if ($elem[6] != "")
            {
            echo ", ISBN " . $elem[6];
            }
         }
      else if ($elem[0] == "S")
         {
         echo $elem[3] . ",&nbsp; ";
         if ($elem[7] != "")
            {
            echo "<a href=\"" . $elem[7] . "\" target=\"_blank\">";
            }
         echo "<i>";
         echo $elem[4];
         echo "</i>";
         if ($elem[7] != "")
            {
            echo "</a>";
            }
         }
      else if ($elem[0] == "W")
         {
         echo $elem[3] . ",&nbsp; ";
         if ($elem[7] != "")
            {
            echo "<a href=\"" . $elem[7] . "\" target=\"_blank\">";
            }
         echo "<i>";
         echo $elem[4];
         echo "</i>";
         if ($elem[7] != "")
            {
            echo "</a>";
            }
         }

      echo "         &nbsp;&nbsp;\n";
      echo "      </td>\n";
      echo "   </tr>\n";
      
      }

   echo "</table>\n";
   }


//Emits a citation with an optional page number and optional parenthesis.
//
function GBL_REF_ref_cite($tag_in, $pagenum_in="", $parens_in=FALSE)
   {
   global $GBL_REF_references;

   if ($parens_in)
      {
      echo "(";
      }

   echo "[";

   $index = FALSE;

   for ($i=0; $i<count($GBL_REF_references); $i++)
      {
      if ($GBL_REF_references[$i][1] == $tag_in)
         {
         $index = $i;
         break;
         }
      }

   if ($index === FALSE)
      echo "??";
   else
      echo ($index+1);

   if ($pagenum_in != "")
      {
      echo ", " . $pagenum_in;
      }

   echo "]";

   if ($parens_in)
      {
      echo ")";
      }
   }
?>