git init1.1.103

6 files changed, 861 insertions, 0 deletions

diff --git a/epglv/COPYING b/epglv/COPYING
new file mode 100644
index 0000000..f90922e
--- /dev/null
+++ b/epglv/COPYING
@@ -0,0 +1,340 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  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
+this service 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 make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  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.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute 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 and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+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
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the 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 a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, 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.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE 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.
+
+		     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
+convey 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 2 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, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision 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, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This 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.
diff --git a/epglv/Makefile b/epglv/Makefile
new file mode 100644
index 0000000..917fb23
--- /dev/null
+++ b/epglv/Makefile
@@ -0,0 +1,60 @@
+#
+# Makefile
+#
+# See the README file for copyright information and how to reach the author.
+#
+
+include ../Make.config
+
+ARCH := $(shell getconf LONG_BIT)
+
+ifneq (,$(findstring "arm", $(shell uname -m)))
+	CPP_FLAGS_32 := -m32
+	CPP_FLAGS_64 := -m64
+endif
+
+CPP_FLAGS := $(CPP_FLAGS_$(ARCH)) -Wall \
+	-fPIC \
+	-I/usr/local/include/mysql \
+	-L/usr/lib/mysql \
+	-L/usr/local/lib/mysql \
+	-I/usr/include/mysql \
+	$(shell mysql_config --libs) \
+	-DMYSQL_DYNAMIC_PLUGIN \
+	-DDEBUG_MYSQL=0
+
+CC := gcc
+
+MYSQL_PLGDIR := $(shell mysql_config --plugindir)
+TARGET  = mysqlepglv.so
+OBJS    = src/epglvbase.o src/epglv.o
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(CC) $(CPP_FLAGS) -pipe -O3 -shared -o $(TARGET) $(OBJS)
+
+install: $(TARGET)
+	strip $(TARGET)
+	if ! test -f $(DESTDIR)/$(MYSQL_PLGDIR)/$(TARGET); then \
+	   install -D --mode=644 -t $(DESTDIR)/$(MYSQL_PLGDIR) $(TARGET); \
+	fi
+
+forceinstall: $(TARGET)
+	strip $(TARGET)
+	install -D --mode=644 -t $(DESTDIR)/$(MYSQL_PLGDIR) $(TARGET); \
+	$(_BINDEST)/epgd-import-epglv
+
+clean:
+	-rm -f $(TARGET) src/*.o src/*~ *~
+
+%.o: %.c
+src/%.o: src/%.c
+	$(CC) -c $(CPP_FLAGS) -pipe -O3 -shared $< -o $@
+
+#--------------------------------------------------------
+# dependencies
+#--------------------------------------------------------
+
+src/epglvbase.o  : src/epglvbase.c  src/epglv.h
+src/epglv.o      : src/epglv.c      src/epglv.h
diff --git a/epglv/README b/epglv/README
new file mode 100644
index 0000000..089f42e
--- /dev/null
+++ b/epglv/README
@@ -0,0 +1,57 @@
+EPG2VDR Levenshtein Distance for MySQL
+Supports UTF-8 insensitive calculation throught iconv.
+
+Copyright (C) 2013 Jörg Wendel
+
+Redistribute as you wish, but leave this information intact.
+
+The build process is integrated in epgd's makefile, to build epglv 
+separately follow this steps:
+
+Compiling:
+----------
+
+   Run 
+   make
+   make install
+
+Installing UDFs in MySQL:
+-------------------------
+
+    Loading UDFs in MySQL, at the mysql prompt call:
+
+      DROP FUNCTION IF EXISTS epglv;
+      DROP FUNCTION IF EXISTS epglvr;
+      CREATE FUNCTION epglv RETURNS INT SONAME 'mysqlepglv.so';
+      CREATE FUNCTION epglvr RETURNS INT SONAME 'mysqlepglv.so';
+
+   Check te installtion by:
+
+      mysql> SELECT * FROM mysql.func;
+      +-----------+-----+-------------------+----------+
+      | name      | ret | dl                | type     |
+      +-----------+-----+-------------------+----------+
+      | epglv     |   2 | mysqlepglv.so     | function |
+      +-----------+-----+-------------------+----------+
+
+Attention:
+----------
+
+    Before changing the lib in MySQLs plugin dir DROP the function if it already exist.
+    Otherwise you can get mysql in a undefined state and a mysql reinstall may necessary!
+
+Using epglv:
+------------
+
+    mysql> select epglv();
+      ERROR: EPGLV() requires two arguments (string, string)
+
+    First string is compared against second string.
+
+      mysql> select epglv('€uro', 'Euro');
+       +----------------------------+
+       | epglv('€uro', 'Euro')      |
+       +----------------------------+
+       |                          1 |
+       +----------------------------+
+
diff --git a/epglv/src/epglv.c b/epglv/src/epglv.c
new file mode 100644
index 0000000..80be809
--- /dev/null
+++ b/epglv/src/epglv.c
@@ -0,0 +1,57 @@
+/*
+
+EPG2VDR Levenshtein Distance UDF for MySQL
+Supports UTF-8 throught iconv.
+
+Copyright (C) 2013 Jörg Wendel
+
+*/
+
+#include "epglv.h"
+
+//***************************************************************************
+// EPGLV()
+//***************************************************************************
+
+my_bool epglv_init(UDF_INIT* init, UDF_ARGS* args, char* message)
+{
+   return base_epglv_init(init, args, message);
+}
+
+void epglv_deinit(UDF_INIT* init)
+{
+   base_epglv_deinit(init);
+}
+
+long long epglv(UDF_INIT* init, UDF_ARGS* args, char* is_null, char* error)
+{
+   long long len1 = 0, len2 = 0;
+   long long diff = base_epglv(init, args, is_null, error, &len1, &len2);
+
+   return diff;
+}
+
+//***************************************************************************
+// EPGLVR()
+//***************************************************************************
+
+my_bool epglvr_init(UDF_INIT* init, UDF_ARGS* args, char* message)
+{
+   return base_epglv_init(init, args, message);
+}
+
+void epglvr_deinit(UDF_INIT* init)
+{
+   base_epglv_deinit(init);
+}
+
+long long epglvr(UDF_INIT* init, UDF_ARGS* args, char* is_null, char* error)
+{
+   long long len1 = 0, len2 = 0;
+
+   long long diff = base_epglv(init, args, is_null, error, &len1, &len2);
+
+   long long len = len1 < len2 ? len2 : len1;
+
+   return (double)diff / ((double)len / 100.0);
+}
diff --git a/epglv/src/epglv.h b/epglv/src/epglv.h
new file mode 100644
index 0000000..39554b8
--- /dev/null
+++ b/epglv/src/epglv.h
@@ -0,0 +1,52 @@
+/*
+
+EPG2VDR Levenshtein Distance UDF for MySQL
+Supports UTF-8 throught iconv.
+
+Copyright (C) 2013 Jörg Wendel
+
+*/
+
+#ifndef __EPGLV_H
+#define __EPGLV_H
+
+#ifdef STANDARD
+# include <string.h>
+#else
+# include <my_global.h>
+# include <my_sys.h>
+#endif
+
+#include <mysql.h>
+#include <m_ctype.h>
+#include <m_string.h>
+
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <iconv.h>
+#include <errno.h>
+#include <stdint.h>
+#include <assert.h>
+
+#define LENGTH_MAX 1000
+
+#define debug_print(fmt, ...) \
+    do { if (DEBUG_MYSQL) fprintf(stderr, "%s():%d> " fmt "\n", \
+         __func__, __LINE__, __VA_ARGS__); fflush(stderr); } while (0)
+
+#define print(fmt, ...) \
+    do { fprintf(stderr, "%s():%d> " fmt "\n", \
+         __func__, __LINE__, __VA_ARGS__); fflush(stderr); } while (0)
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
+#endif //  __EPGLV_H
+
+my_bool base_epglv_init(UDF_INIT* init, UDF_ARGS* args, char* message);
+void base_epglv_deinit(UDF_INIT* init);
+long long base_epglv(UDF_INIT* init, UDF_ARGS* args, char* is_null, 
+                     char* error, long long* l1, long long* l2);
diff --git a/epglv/src/epglvbase.c b/epglv/src/epglvbase.c
new file mode 100644
index 0000000..845edcb
--- /dev/null
+++ b/epglv/src/epglvbase.c
@@ -0,0 +1,295 @@
+/*
+
+EPG2VDR Levenshtein Distance UDF for MySQL
+Supports UTF-8 i throught iconv.
+
+Copyright (C) 2013 Jörg Wendel
+
+*/
+
+#include "epglv.h"
+
+//***************************************************************************
+// Declarations
+//***************************************************************************
+
+struct workspace_t  // structure to allocate memory in init and use it in core functions
+{
+   char*      str1;          // internal buffer to store 1st string
+   char*      str2;          // internal buffer to store 2nd string
+   int*       row0;          // round buffer for levenshtein_core function
+   int*       row1;          // round buffer for levenshtein_core function
+   int*       row2;          // round buffer for levenshtein_core function
+   mbstate_t* mbstate;       // buffer for mbsnrtowcs
+   iconv_t    ic;            // buffer for iconv
+   char       iconv_init;    // flag indicating if iconv has been inited before
+};
+
+//***************************************************************************
+// Function Declarations
+//***************************************************************************
+
+int epglv_core(struct workspace_t *ws,
+               const char *str1, int len1,
+               const char *str2, int len2,
+               int w, int s, int a, int d, int limit);
+
+char* epglv_utf8toiso(const char *str_src, long long *len_src,
+                      struct workspace_t * ws, char *str_dst, int limit);
+
+//***************************************************************************
+// The Work
+//***************************************************************************
+//***************************************************************************
+// init - check parameters and allocate memory for MySql
+//***************************************************************************
+
+my_bool base_epglv_init(UDF_INIT* init, UDF_ARGS* args, char* message)
+{
+    struct workspace_t *ws;
+
+    // make sure both arguments are ok
+    
+    if (args->arg_count != 2 || args->arg_type[0] != STRING_RESULT || args->arg_type[1] != STRING_RESULT)
+    {
+       strncpy(message, "EPGLV() requires arguments (string, string)", 80);
+       return 1;
+    }
+
+    init->maybe_null = 0;      // EPGLV() will not be returning null
+
+    // attempt to allocate memory in which to calculate distance
+
+    ws = (struct workspace_t*)malloc(sizeof(struct workspace_t));
+    ws->mbstate = (mbstate_t*)malloc(sizeof(mbstate_t));
+    ws->str1 = (char*)malloc(sizeof(char)*(LENGTH_MAX+2));    // max allocated for UTF-8 complex string
+    ws->str2 = (char*)malloc(sizeof(char)*(LENGTH_MAX+2));
+    ws->row0 = (int*)malloc(sizeof(int)*(LENGTH_MAX+2));
+    ws->row1 = (int*)malloc(sizeof(int)*(LENGTH_MAX+2));
+    ws->row2 = (int*)malloc(sizeof(int)*(LENGTH_MAX+2));
+    ws->iconv_init = 0;
+
+    if (!ws || !ws->mbstate || !ws->str1 || !ws->str2 || !ws->row0 || !ws->row1 || !ws->row2) 
+    {
+        free(ws->row2); free(ws->row1); free(ws->row0);
+        free(ws->str2); free(ws->str1);
+        free(ws->mbstate); free(ws);
+        strncpy(message, "EPGLV() failed to allocate memory", 80);
+        return 1;
+    }
+
+    if (!setlocale(LC_CTYPE, "de_DE.UTF-8")) 
+    {
+        free(ws->row2); free(ws->row1); free(ws->row0);
+        free(ws->str2); free(ws->str1);
+        free(ws->mbstate); free(ws);
+        strncpy(message, "EPGLV() failed to change locale", 80);
+        return 1;
+    }
+
+    init->ptr = (char *) ws;
+    debug_print("%s", "init successful");
+
+    return 0;
+}
+
+//***************************************************************************
+// deallocate memory, clean and close
+//***************************************************************************
+
+void base_epglv_deinit(UDF_INIT* init)
+{
+   if (init->ptr) 
+   {
+      struct workspace_t* ws = (struct workspace_t*)init->ptr;
+
+      if (ws->iconv_init)
+         iconv_close(ws->ic);
+
+      free(ws->row2);
+      free(ws->row1);
+      free(ws->row0);
+      free(ws->str2);
+      free(ws->str1);
+      free(ws->mbstate);
+      free(ws);
+   }
+
+   debug_print("%s", "bye");
+}
+
+//***************************************************************************
+// check parameters and allocate memory for MySql
+//***************************************************************************
+
+long long base_epglv(UDF_INIT* init, UDF_ARGS* args, char* is_null, char* error, 
+                     long long* len1, long long* len2)
+{
+   const char* str1 = args->args[0];
+   const char* str2 = args->args[1];
+  
+   char* iso_str1 = 0;
+   char* iso_str2 = 0;
+   struct workspace_t* ws = (struct workspace_t*)init->ptr;  // get a pointer to memory previously allocated
+
+   *error = 0; 
+   *len1 = (!str1) ? 0 : args->lengths[0];
+   *len2 = (!str2) ? 0 : args->lengths[1];
+   long long max = *len1 > *len2 ? *len1 : *len2;
+
+   if (max >= LENGTH_MAX) 
+   {
+      print("size(%lld) was bigger than %d, aborting", max, LENGTH_MAX);
+      return -1;
+   }
+
+   if (!*len1 && !*len2)
+      return 0;
+
+   if (!*len1 || !*len2)
+      return max;
+
+   if ((iso_str1 = epglv_utf8toiso(str1, len1, ws, ws->str1, max)) == 0)
+      return -1;
+
+   if ((iso_str2 = epglv_utf8toiso(str2, len2, ws, ws->str2, max)) == 0) 
+      return -1;
+   
+   return epglv_core(
+      ws,
+      iso_str1, *len1,
+      iso_str2, *len2,
+      /* swap */         1,
+      /* substitution */ 1,
+      /* insertion */    1,
+      /* deletion */     1,
+      /* limit */        max);
+}
+
+//***************************************************************************
+// core function
+//***************************************************************************
+
+int epglv_core(struct workspace_t* ws,
+                const char* str1, int len1,
+                const char* str2, int len2,
+                int w, int s, int a, int d, int limit) 
+{
+    int* row0 = ws->row0;
+    int* row1 = ws->row1;
+    int* row2 = ws->row2;
+    int i, j;
+
+    for (j = 0; j <= len2; j++)
+        row1[j] = j * a;
+
+    for (i = 0; i < len1; i++) 
+    {
+       int* dummy;
+       
+       row2[0] = (i + 1) * d;
+
+       for (j = 0; j < len2; j++) 
+       {
+          // substitution
+
+          row2[j + 1] = row1[j] + s * (str1[i] != str2[j]);
+
+          // swap
+
+          if (i > 0 && j > 0 && 
+              str1[i - 1] == str2[j] &&
+              str1[i] == str2[j - 1] &&
+              row2[j + 1] > row0[j - 1] + w) 
+          {
+             row2[j + 1] = row0[j - 1] + w;
+          }
+
+          // deletion
+
+          if (row2[j + 1] > row1[j + 1] + d) 
+             row2[j + 1] = row1[j + 1] + d;
+          
+          // insertion
+
+          if (row2[j + 1] > row2[j] + a) 
+             row2[j + 1] = row2[j] + a;
+       }
+       
+       dummy = row0;
+       row0 = row1;
+       row1 = row2;
+       row2 = dummy;
+    }
+    
+    debug_print("returning(%d)", row1[len2]);
+
+    return row1[len2];
+}
+
+//**************************************************************************
+// translates an UTF8 string to ISO with some error return codes
+//**************************************************************************
+
+char* epglv_utf8toiso(const char* str_src, long long* len_src,
+                      struct workspace_t* ws, char* str_dst, int limit) 
+{
+   mbstate_t* mbstate = ws->mbstate;
+   size_t len_mbsnrtowcs, len_ret = LENGTH_MAX, len_min = LENGTH_MAX;
+   char* ret = str_dst;
+   char* in_s = (char*)str_src;
+   
+   memset((void*)mbstate, '\0', sizeof(mbstate_t));
+   
+   if ((len_mbsnrtowcs = mbsnrtowcs(0, &str_src, *len_src, 0, mbstate)) == -1) 
+   {
+      print("mbsnrtowcs failed, str_src(%s): '%m'", str_src);
+      strncpy(str_dst, str_src, len_min);
+      str_dst[len_min] = 0; str_dst[len_min + 1] = 0;
+      *len_src = len_min;
+      return str_dst;
+   }
+   
+   len_min = MIN(len_mbsnrtowcs, limit);
+   
+   if (len_mbsnrtowcs == *len_src)
+   {
+      strncpy(str_dst, str_src, len_min);
+      str_dst[len_min] = 0; str_dst[len_min + 1] = 0;
+      *len_src = len_min;
+      return str_dst;
+   }
+   
+   if (!ws->iconv_init)
+   {
+      if ((ws->ic = iconv_open("ISO8859-15", "UTF-8")) == (iconv_t)-1)
+      {
+         print("%s", "failed to initialize iconv '%m'");
+         return 0;
+      }
+      
+      ws->iconv_init = 1;
+   }
+   
+   if (iconv(ws->ic, &in_s, (size_t*)len_src, &ret, &len_ret) == -1) 
+   {
+      if (errno != E2BIG)
+      {
+         print("in_s '%s' at '%s'; len_src (%lld) len_ret (%zu) '%m'", str_src, in_s, *len_src, len_ret);
+         strncpy(str_dst, str_src, len_min);
+         str_dst[len_min] = 0; str_dst[len_min + 1] = 0;
+         *len_src = len_min;
+         return str_dst;
+      }
+
+      print("inside E2BIG len_mbsnrtowcs(%zu) len_src(%lld)", len_mbsnrtowcs, *len_src);
+      len_mbsnrtowcs = len_min;
+   }
+   
+   *len_src = len_min;           // adjust converted length
+   str_dst[len_min] = 0; str_dst[len_min + 1] = 0;
+   
+   iconv(ws->ic, 0, 0, 0, 0);
+   
+   return str_dst;
+}