--- /dev/null
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+
--- /dev/null
+MODULE_big = ludia_funcs
+OBJS = ludia_funcs.o ludia_tp.o
+
+EXTENSION = ludia_funcs
+DATA = ludia_funcs--1.0.sql
+
+REGRESS = ludia_funcs
+
+SENNA_CFG = senna-cfg
+SENNA_LIBS = $(shell $(SENNA_CFG) --libs)
+SENNA_LIBPATH := $(patsubst -L%,%,$(filter -L%,$(SENNA_LIBS)))
+SENNA_CFLAGS = $(shell $(SENNA_CFG) --cflags)
+SENNA_VERSION := $(subst .,,$(shell $(SENNA_CFG) --version))
+
+PG_CPPFLAGS += -DSENNA_VERSION=$(SENNA_VERSION) $(SENNA_CFLAGS)
+SHLIB_LINK += -Wl,-rpath,'$(SENNA_LIBPATH)' $(SENNA_LIBS)
+
+ifdef TEXTPORTER
+PG_CPPFLAGS += -DDMC_LINUX_X86_64 -DTEXTPORTER -I$(TEXTPORTER)/Include
+SHLIB_LINK += -L$(TEXTPORTER)/Lib -ldmc_txif
+endif
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = contrib/ludia_funcs
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
--- /dev/null
+LOAD '$libdir/ludia_funcs';
+CREATE EXTENSION ludia_funcs;
+SET standard_conforming_strings TO off;
+SET escape_string_warning TO off;
+\pset null '(null)'
+SET ludia_funcs.escape_snippet_keyword TO on;
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\');
+ pgs2snippet1
+--------------
+ @\@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"￥"', '\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"￥"', '￥');
+ pgs2snippet1
+--------------
+ @￥@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '￥');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '"');
+ pgs2snippet1
+--------------
+ @"@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"”"', '"');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"”"', '”');
+ pgs2snippet1
+--------------
+ @”@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '”');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\\\');
+ pgs2snippet1
+--------------
+ @\@@\@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', '\\\\');
+ pgs2snippet1
+--------------
+ @\\@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', '\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '""');
+ pgs2snippet1
+--------------
+ @"@@"@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""""', '""');
+ pgs2snippet1
+--------------
+ @""@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""""', '"');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', 'あ\\');
+ pgs2snippet1
+--------------
+ あ@\@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\あ');
+ pgs2snippet1
+--------------
+ @\@あ
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', 'あ\\');
+ pgs2snippet1
+--------------
+ @あ\@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', '\\あ');
+ pgs2snippet1
+--------------
+ @\あ@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', '\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', '\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', 'あ"');
+ pgs2snippet1
+--------------
+ あ@"@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '"あ');
+ pgs2snippet1
+--------------
+ @"@あ
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', 'あ"');
+ pgs2snippet1
+--------------
+ @あ"@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', '"あ');
+ pgs2snippet1
+--------------
+ @"あ@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', '"');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', '"');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'う\\え');
+ pgs2snippet1
+--------------
+ @う\え@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\"', 'う\\え');
+ pgs2snippet1
+--------------
+ @う\@え
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\え"', 'う\\え');
+ pgs2snippet1
+--------------
+ う@\え@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', 'う\\え');
+ pgs2snippet1
+--------------
+ う@\@え
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\"', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\え"', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'う');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'う"え');
+ pgs2snippet1
+--------------
+ @う"え@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う""', 'う"え');
+ pgs2snippet1
+--------------
+ @う"@え
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""え"', 'う"え');
+ pgs2snippet1
+--------------
+ う@"え@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', 'う"え');
+ pgs2snippet1
+--------------
+ う@"@え
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う""', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""え"', 'うえ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'う');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', 'あいう\\えお');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', 'あいう\\\\えお');
+ pgs2snippet1
+----------------
+ あいう@\\@えお
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\""', 'あいう"えお');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\""', 'あいう\\"えお');
+ pgs2snippet1
+----------------
+ あいう@\"@えお
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"+"', '+');
+ pgs2snippet1
+--------------
+ @+@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"+"', 'あいう+えお');
+ pgs2snippet1
+---------------
+ あいう@+@えお
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""+"', 'あいう"+えお');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"-"', '-');
+ pgs2snippet1
+--------------
+ @-@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"-"', 'あいう-えお');
+ pgs2snippet1
+---------------
+ あいう@-@えお
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""-"', 'あいう"-えお');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '" え"', 'あいう えお');
+ pgs2snippet1
+---------------
+ あいう@ え@お
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"" え"', 'あいう" えお');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, 'あ', '');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ"', '');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '+', '+"\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"', '+"\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '\\', '+"\\');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ');
+ pgs2snippet1
+--------------
+ (null)
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ', 1);
+ERROR: function pgs2snippet1(integer, integer, integer, unknown, unknown, integer, unknown, unknown, integer) does not exist
+LINE 1: SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ', 1);
+ ^
+HINT: No function matches the given name and argument types. You might need to add explicit type casts.
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"BB"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ @AA@"A+A\B+B"@BB@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+""B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ @AA@"A+A\B+B@"B@B
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"+B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ @AA@"A+A\B@+B@"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"\\B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ @AA@"A+A@\B@+B"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"BB"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ A@A"@A+A\B+B"@BB@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+""B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ A@A"@A+A\B+B@"B@B
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"+B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ A@A"@A+A\B@+B@"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"\\B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ A@A"@A+A@\B@+B"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"BB"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"@A+@A\B+B"@BB@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+""B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"@A+@A\B+B@"B@B
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"+B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"@A+@A\B@+B@"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"\\B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"@A+@A@\B@+B"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"BB"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"A+@A\@B+B"@BB@
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+""B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"A+@A\@B+B@"B@B
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"+B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-------------------
+ AA"A+@A\@B@+B@"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"\\B"', 'AA"A+A\\B+B"BB');
+ pgs2snippet1
+-----------------
+ AA"A+@A\@B+B"BB
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AB"CD"', 'AB"CD');
+ pgs2snippet1
+--------------
+ @AB"CD@
+(1 row)
+
+SET ludia_funcs.escape_snippet_keyword TO off;
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AB"CD"', 'AB"CD');
+ pgs2snippet1
+--------------
+ @AB@"CD
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@@BBB@CCCDDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@@BBB@CCCDDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@BBB@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@BBB@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+--------------------
+ @AA"A@BBBCCCDDDEEE
+(1 row)
+
+SET ludia_funcs.escape_snippet_keyword TO on;
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@@BBB@CCCDDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+------------------------
+ @AA"A@@BBB@@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@@BBB@CCCDDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@BBB@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+----------------------
+ @AA"A@BBB@CCC@DDDEEE
+(1 row)
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+ pgs2snippet1
+--------------------
+ @AA"A@BBBCCCDDDEEE
+(1 row)
+
--- /dev/null
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION ludia_funcs" to load this file. \quit
+
+CREATE FUNCTION pgs2textporter1(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT VOLATILE;
+
+CREATE FUNCTION pgs2snippet1(integer, integer, integer,
+ text, text, integer, text, text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE;
+
+CREATE FUNCTION pgs2norm(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE;
+
+CREATE FUNCTION pgs2seninfo(OUT version text,
+ OUT configure_options text)
+RETURNS record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT IMMUTABLE;
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * Copyright (c) 2006-2013, NTT DATA Corporation
+ * All rights reserved.
+ *
+ * Changelog:
+ * 2013/01/09
+ * Update Ludia functions so that they are available with PostgreSQL9.1.
+ * Author: NTT DATA Corporation
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "catalog/pg_type.h"
+#include "fmgr.h"
+#include "funcapi.h"
+#include "ludia_funcs.h"
+#include "mb/pg_wchar.h"
+#include "senna.h"
+#include "storage/fd.h"
+#include "utils/builtins.h"
+#include "utils/guc.h"
+#include "miscadmin.h"
+
+PG_MODULE_MAGIC;
+
+/* Last update date of ludia_funcs */
+#define PGS2_LAST_UPDATE "2013.03.15"
+
+/* GUC variables */
+#ifdef PGS2_DEBUG
+static bool pgs2_enable_debug = false;
+#endif
+static char *pgs2_last_update = NULL;
+static int norm_cache_limit = -1;
+static bool escape_snippet_keyword = false;
+
+#define SEN_NORMALIZE_FLAGS 0
+#define SEN_MAX_N_EXPRS 32
+
+/* upper limit for GUC variables measured in kilobytes of memory */
+/* note that various places assume the byte size fits in a "long" variable */
+#if SIZEOF_SIZE_T > 4 && SIZEOF_LONG > 4
+#define MAX_KILOBYTES INT_MAX
+#else
+#define MAX_KILOBYTES (INT_MAX / 1024)
+#endif
+
+#define ISBACKSLASHCHAR(x) (*(x) == '\\')
+#define ISDOUBLEQUOTECHAR(x) (*(x) == '"')
+#define ISSENNAOPSCHAR(x) (*(x) == '+' || *(x) == '-' || *(x) == ' ')
+
+PG_FUNCTION_INFO_V1(pgs2snippet1);
+Datum pgs2snippet1(PG_FUNCTION_ARGS);
+PG_FUNCTION_INFO_V1(pgs2norm);
+Datum pgs2norm(PG_FUNCTION_ARGS);
+PG_FUNCTION_INFO_V1(pgs2textporter1);
+Datum pgs2textporter1(PG_FUNCTION_ARGS);
+PG_FUNCTION_INFO_V1(pgs2seninfo);
+Datum pgs2seninfo(PG_FUNCTION_ARGS);
+
+static sen_encoding GetSennaEncoding(void);
+static sen_query *GetSennaQuery(char *str, size_t len);
+static bool EscapeSnippetKeyword(char **s, size_t *slen);
+
+#ifdef TEXTPORTER
+#define TEXTPORTER_TMPDIR "/tmp"
+#define TEXTPORTER_GROUPNAME "UTF-8"
+#define TEXTPORTER_DEFLANGNAME "Japanese"
+#define TEXTPORTER_BBIGENDIAN 1
+#define TEXTPORTER_OPTION 0x00000020 /* DMC_GETTEXT_OPT_LF */
+#define TEXTPORTER_OPTION_STRING "32"
+#define TEXTPORTER_OPTION1 0x00010000 /* DMC_GETTEXT_OPT1_TXCONV */
+#define TEXTPORTER_SIZE 0
+#define TEXTPORTER_CSV_C 0
+
+/* GUC variables for pgs2textpoter1 */
+static int textporter_error = ERROR;
+static unsigned int textporter_option = TEXTPORTER_OPTION;
+
+/*
+ * This variable is a dummy that doesn't do anything, except in some
+ * cases provides the value for SHOW to display. The real state is
+ * elsewhere and is kept in sync by assign_hooks.
+ */
+static char *textporter_option_string;
+
+static const struct config_enum_entry textporter_error_options[] = {
+ {"debug1", DEBUG1, false},
+ {"log", LOG, false},
+ {"info", INFO, false},
+ {"notice", NOTICE, false},
+ {"warning", WARNING, false},
+ {"error", ERROR, false},
+ {NULL, 0, false}
+};
+
+static void CleanupTextPorterTmpFiles(void);
+
+static bool check_textporter_option(char **newval, void **extra, GucSource source);
+static void assign_textporter_option(const char *newval, void *extra);
+#endif /* TEXTPORTER */
+
+void _PG_init(void);
+void _PG_fini(void);
+
+void
+_PG_init(void)
+{
+ sen_rc rc;
+
+#ifdef PGS2_DEBUG
+ /* Define custom GUC variable for debugging */
+ DefineCustomBoolVariable("ludia_funcs.enable_debug",
+ "Emit ludia_funcs debugging output.",
+ NULL,
+ &pgs2_enable_debug,
+ false,
+ PGC_USERSET,
+ 0,
+ NULL,
+ NULL,
+ NULL);
+#endif
+
+ /* Can't be set in postgresql.conf */
+ DefineCustomStringVariable("ludia_funcs.last_update",
+ "Shows the last update date of ludia_funcs.",
+ NULL,
+ &pgs2_last_update,
+ PGS2_LAST_UPDATE,
+ PGC_INTERNAL,
+ GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE,
+ NULL,
+ NULL,
+ NULL);
+
+#ifdef TEXTPORTER
+ /* Define custom GUC variables */
+ DefineCustomEnumVariable("ludia_funcs.textporter_error",
+ "Sets the message levels that are emitted "
+ "when textporter fails.",
+ NULL,
+ &textporter_error,
+ ERROR,
+ textporter_error_options,
+ PGC_SUSET,
+ 0,
+ NULL,
+ NULL,
+ NULL);
+
+ DefineCustomStringVariable("ludia_funcs.textporter_option",
+ "Sets the option used to get text data "
+ "from TextPorter",
+ NULL,
+ &textporter_option_string,
+ TEXTPORTER_OPTION_STRING,
+ PGC_SUSET,
+ 0,
+ check_textporter_option,
+ assign_textporter_option,
+ NULL);
+
+ /* Clean up remaining textporter temporary files */
+ CleanupTextPorterTmpFiles();
+#endif /* TEXTPORTER */
+
+ /*
+ * A value of 0 means no limit on the cache size. A value of -1 means
+ * that work_mem is used as the upper size limit of the cache.
+ */
+ DefineCustomIntVariable("ludia_funcs.norm_cache_limit",
+ "Sets the maximum memory to be used for caching "
+ "the result of pgs2norm()",
+ NULL,
+ &norm_cache_limit,
+ -1,
+ -1,
+ MAX_KILOBYTES,
+ PGC_USERSET,
+ GUC_UNIT_KB,
+ NULL,
+ NULL,
+ NULL);
+
+ DefineCustomBoolVariable("ludia_funcs.escape_snippet_keyword",
+ "Escapes snippet keyword string.",
+ NULL,
+ &escape_snippet_keyword,
+ false,
+ PGC_USERSET,
+ 0,
+ NULL,
+ NULL,
+ NULL);
+
+ EmitWarningsOnPlaceholders("ludia_funcs");
+
+ /* Initialize Senna */
+ rc = sen_init();
+ if (rc != sen_success)
+ ereport(ERROR,
+ (errmsg("sen_init() failed: %d", rc)));
+}
+
+void
+_PG_fini(void)
+{
+}
+
+#ifdef TEXTPORTER
+#define REMOVE_TMPFILE(path) \
+ do { \
+ if (unlink(path) != 0) \
+ ereport(WARNING, \
+ (errcode_for_file_access(), \
+ errmsg("could not remove temporary file \"%s\": %m", path))); \
+ } while(0)
+
+Datum
+pgs2textporter1(PG_FUNCTION_ARGS)
+{
+ char *appfile = text_to_cstring(PG_GETARG_TEXT_P(0));
+ char txtfile[] = TEXTPORTER_TMPDIR "/ludia_funcs_XXXXXX";
+ int tmpfd;
+ int ret;
+ FILE *fp;
+ text *result = NULL;
+ struct stat statbuf;
+ bool return_null = false;
+
+ /* Confirm that database encoding is UTF-8 */
+ GetSennaEncoding();
+
+ PG_TRY();
+ {
+ /*
+ * Generate a unique temporary filename where text data gotten
+ * from application file by TextPorter is stored temporarily.
+ */
+ tmpfd = mkstemp(txtfile);
+ if (tmpfd < 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not generate a unique temporary filename: %m")));
+ if (close(tmpfd) != 0)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not close temporary file \"%s\": %m", txtfile)));
+
+ /*
+ * Run TextPorter to read text data from application file (appfile)
+ * to temporary file (txtfile).
+ */
+ ret = ExecTextPorter((unsigned char *)appfile,
+ (unsigned char *)txtfile,
+ (unsigned char *)TEXTPORTER_GROUPNAME,
+ (unsigned char *)TEXTPORTER_DEFLANGNAME,
+ TEXTPORTER_BBIGENDIAN, textporter_option,
+ TEXTPORTER_OPTION1, TEXTPORTER_SIZE,
+ TEXTPORTER_CSV_C);
+ if (ret != 0)
+ {
+ ereport(textporter_error,
+ (errmsg("could not get text from application file \"%s\"",
+ appfile),
+ errdetail("DMC_GetText_V5() failed with errcode %d",
+ ret)));
+
+ /* Return NULL if textporter_error is set to other than ERROR */
+ return_null = true;
+ }
+ else
+ {
+ /* Read text data from temporary file to memory */
+ if (stat(txtfile, &statbuf))
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not stat file \"%s\": %m", txtfile)));
+ result = (text *) palloc(statbuf.st_size + VARHDRSZ);
+
+ fp = AllocateFile(txtfile, "r");
+ if (fp == NULL)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not open file \"%s\": %m", txtfile)));
+
+ if (fread(VARDATA(result), 1, statbuf.st_size, fp) != statbuf.st_size ||
+ ferror(fp))
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not read file \"%s\": %m", txtfile)));
+
+ FreeFile(fp);
+ }
+
+ REMOVE_TMPFILE(txtfile);
+ pfree(appfile);
+ }
+ PG_CATCH();
+ {
+ REMOVE_TMPFILE(txtfile);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ if (return_null)
+ PG_RETURN_NULL();
+
+ SET_VARSIZE(result, statbuf.st_size + VARHDRSZ);
+
+ PG_RETURN_TEXT_P(result);
+}
+
+/*
+ * Clean up remaining textporter temporary files
+ */
+static void
+CleanupTextPorterTmpFiles(void)
+{
+ DIR *tpdir;
+ struct dirent *tpde;
+ char path[MAXPGPATH];
+
+ tpdir = AllocateDir(TEXTPORTER_TMPDIR);
+ if (tpdir == NULL)
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not open textporter temporary file directory \"%s\": %m",
+ TEXTPORTER_TMPDIR)));
+
+ while ((tpde = ReadDir(tpdir, TEXTPORTER_TMPDIR)) != NULL)
+ {
+ if (strlen(tpde->d_name) == 18 &&
+ strncmp(tpde->d_name, "ludia_funcs_", 12) == 0)
+ {
+ snprintf(path, MAXPGPATH, TEXTPORTER_TMPDIR "/%s", tpde->d_name);
+ REMOVE_TMPFILE(path);
+ }
+ }
+
+ FreeDir(tpdir);
+}
+
+static bool
+check_textporter_option(char **newval, void **extra, GucSource source)
+{
+ unsigned long val;
+ char *endptr;
+ unsigned int *myextra;
+
+ errno = 0;
+ val = strtoul(*newval, &endptr, 0);
+
+ if (*endptr != '\0')
+ return false;
+
+ if (errno == ERANGE || val != (unsigned long) ((unsigned int) val))
+ {
+ GUC_check_errhint("Value exceeds unsigned integer range.");
+ return false;
+ }
+
+ /* Set up the "extra" struct actually used by assign_textporter_option */
+ myextra = (unsigned int *) malloc(sizeof(unsigned int));
+ if (myextra == NULL)
+ {
+ GUC_check_errcode(ERRCODE_OUT_OF_MEMORY);
+ GUC_check_errmsg("out of memory");
+ return false;
+ }
+ *myextra = (unsigned int) val;
+ *extra = (void *) myextra;
+
+ return true;
+}
+
+static void
+assign_textporter_option(const char *newval, void *extra)
+{
+ textporter_option = *((unsigned int *) extra);
+}
+
+#else /* TEXTPORTER */
+
+Datum
+pgs2textporter1(PG_FUNCTION_ARGS)
+{
+ PG_RETURN_NULL();
+}
+
+#endif /* TEXTPORTER */
+
+static sen_encoding
+GetSennaEncoding(void)
+{
+ static sen_encoding encoding = sen_enc_default;
+
+ if (encoding == sen_enc_default)
+ {
+ if (GetDatabaseEncoding() == PG_UTF8)
+ encoding = sen_enc_utf8;
+ else
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("does not support database encoding \"%s\"",
+ GetDatabaseEncodingName())));
+ }
+ return encoding;
+}
+
+/*
+ * Escape the backslash and double quote characters in the given string.
+ *
+ * Return false if the given string has no character which needs to be
+ * escaped. Otherwise, return true. In this case, **s points the palloc'd
+ * space storing the escaped keyword string and *slen is set to the size
+ * of that string. The caller needs to free the palloc'd space.
+ */
+static bool
+EscapeSnippetKeyword(char **s, size_t *slen)
+{
+ const char *sp;
+ char *ep;
+ char *escaped;
+ int mblen;
+ int copylen;
+ bool in_doublequote = false;
+ bool in_sennaops = false;
+ bool need_escape = false;
+
+ /*
+ * Skip the heading double quote character because it always doesn't
+ * need to be interpreted as a character itself and be escaped.
+ * Note that we must not skip the heading character if it's not a
+ * double quote.
+ */
+ sp = *s;
+ if (ISDOUBLEQUOTECHAR(sp))
+ sp++;
+
+ /*
+ * Check whether the snippet keyword string has a character which
+ * needs to be escaped.
+ */
+ while ((sp - *s) < *slen)
+ {
+ mblen = pg_mblen(sp);
+
+ /*
+ * Backslash in the keyword always needs to be escaped.
+ */
+ if (ISBACKSLASHCHAR(sp))
+ {
+ need_escape = true;
+ break;
+ }
+
+ if (in_doublequote)
+ {
+ if (ISSENNAOPSCHAR(sp))
+ {
+ in_sennaops = true;
+ in_doublequote = false;
+ }
+ else
+ {
+ /*
+ * Double quote in the keyword needs to be escaped if
+ * any Senna search operators are to neither its right
+ * nor left.
+ */
+ need_escape = true;
+ break;
+ }
+ }
+ else
+ {
+ if (ISDOUBLEQUOTECHAR(sp) && !in_sennaops)
+ in_doublequote = true;
+ if (!ISSENNAOPSCHAR(sp))
+ in_sennaops = false;
+ }
+
+ sp += mblen;
+ }
+
+ /*
+ * Quick exit if the keyword has no character which needs to be
+ * escaped.
+ */
+ if (!need_escape)
+ return false;
+
+ /*
+ * Allocate the buffer space to store the escaped snippet keyword string.
+ * The maximum size of escaped string is double the input keyword size.
+ * The size reaches the maximum when every character in the input keyword
+ * needs to be escaped.
+ */
+ ep = escaped = (char *) palloc(*slen * 2);
+
+ /*
+ * Copy the characters which have been passed through in the above loop
+ * and don't need to be escaped, into the buffer. If in_doublequote is
+ * true, we don't copy the double quote in the previous position into the
+ * buffer because it might still need to be escaped.
+ */
+ copylen = sp - *s - ((in_doublequote) ? 1 : 0);
+ memcpy(ep, *s, copylen);
+ ep += copylen;
+
+ /*
+ * Construct the escaped snippet keyword string.
+ */
+ while ((sp - *s) < *slen)
+ {
+ mblen = pg_mblen(sp);
+
+ if (in_doublequote)
+ {
+ /*
+ * dqchar indicates the previous character, that is a double
+ * quote. We assume here that a double quote is single-byte
+ * character.
+ */
+ char dqchar = *(sp - 1);
+
+ if (ISSENNAOPSCHAR(sp))
+ {
+ /*
+ * Don't escape the double quote which is just before Senna
+ * operator.
+ */
+ *ep++ = dqchar;
+ *ep++ = *sp;
+ in_sennaops = true;
+ in_doublequote = false;
+ }
+ else
+ {
+ /*
+ * Escape the double quote if no Senna operator is next to it.
+ */
+ *ep++ = '\\';
+ *ep++ = dqchar;
+
+ if (ISDOUBLEQUOTECHAR(sp))
+ in_doublequote = true;
+ else
+ {
+ if (ISBACKSLASHCHAR(sp))
+ *ep++ = '\\';
+ memcpy(ep, sp, mblen);
+ ep += mblen;
+ in_doublequote = false;
+ }
+ }
+ }
+ else
+ {
+ if (ISDOUBLEQUOTECHAR(sp))
+ {
+ /*
+ * Don't escape the double quote which is just after Senna
+ * operator.
+ */
+ if (in_sennaops)
+ *ep++ = *sp;
+ else
+ in_doublequote = true;
+ }
+ else
+ {
+ if (ISBACKSLASHCHAR(sp))
+ *ep++ = '\\';
+ /*
+ * We don't check ISSENNAOPSCHAR() here. We handle Senna
+ * operator character as a character itself instead of
+ * an operator if it doesn't follow a double quote.
+ */
+ memcpy(ep, sp, mblen);
+ ep += mblen;
+ }
+
+ if (!ISSENNAOPSCHAR(sp))
+ in_sennaops = false;
+ }
+
+ sp += mblen;
+ }
+
+ /* Add the tailing double quote into the buffer */
+ if (in_doublequote)
+ *ep++ = *(sp - 1);
+
+ *s = escaped;
+ *slen = ep - *s;
+
+#ifdef PGS2_DEBUG
+ if (pgs2_enable_debug)
+ {
+ char *tmp = pnstrdup(*s, *slen);
+
+ elog(LOG, "escaped snippet keyword: %s", tmp);
+ pfree(tmp);
+ }
+#endif
+
+ return true;
+}
+
+static sen_query *
+GetSennaQuery(char *str, size_t len)
+{
+ static sen_query *query_cache = NULL;
+ static char *key_cache = NULL;
+ static size_t len_cache = 0;
+ static bool guc_cache = false;
+ sen_query *query;
+ sen_encoding encoding;
+ char *key;
+ size_t key_len;
+ int rest;
+ bool needfree = false;
+
+ /*
+ * Return the cached Senna query if the same keyword has
+ * been used the last time.
+ */
+ if (key_cache != NULL &&
+ len == len_cache &&
+ strncmp(key_cache, str, len) == 0 &&
+ escape_snippet_keyword == guc_cache)
+ {
+#ifdef PGS2_DEBUG
+ if (pgs2_enable_debug)
+ {
+ char *tmp = pnstrdup(str, len);
+
+ elog(LOG, "GetSennaQuery(): quick exit: %s", tmp);
+ pfree(tmp);
+ }
+#endif
+ return query_cache;
+ }
+
+ encoding = GetSennaEncoding();
+
+ key = malloc(len);
+ if (key == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
+
+ /*
+ * We always cache the unescaped keyword. Which enables us
+ * to check whether we can use the cached Senna query before
+ * escaping the keyword.
+ */
+ memcpy(key, str, len);
+ key_len = len;
+
+ /*
+ * If the keyword has been escaped, 'str' points to the
+ * newly-palloc'd space storing the escaped keyword. This
+ * space needs to be freed later.
+ */
+ if (escape_snippet_keyword)
+ needfree = EscapeSnippetKeyword(&str, &len);
+
+ query = sen_query_open(str, len, sen_sel_or, SEN_MAX_N_EXPRS,
+ encoding);
+ if (query == NULL)
+ {
+ free(key);
+ ereport(ERROR,
+ (errmsg("sen_query_open() failed")));
+ }
+
+ if ((rest = sen_query_rest(query, NULL)) != 0)
+ ereport(WARNING,
+ (errmsg("too many expressions (%d)", rest)));
+
+ if (query_cache != NULL)
+ {
+ sen_query_close(query_cache);
+ free(key_cache);
+ }
+
+ key_cache = key;
+ len_cache = key_len;
+ query_cache = query;
+ guc_cache = escape_snippet_keyword;
+
+ if (needfree)
+ pfree(str);
+
+ return query;
+}
+
+Datum
+pgs2snippet1(PG_FUNCTION_ARGS)
+{
+ int flags = PG_GETARG_INT32(0);
+ uint32 width = PG_GETARG_UINT32(1);
+ uint32 max_results = PG_GETARG_UINT32(2);
+ text *opentags = PG_GETARG_TEXT_P(3);
+ text *closetags = PG_GETARG_TEXT_P(4);
+ int mapping = PG_GETARG_INT32(5);
+ text *keywords = PG_GETARG_TEXT_P(6);
+ text *document = PG_GETARG_TEXT_P(7);
+ sen_query *query;
+ sen_snip *snip = NULL;
+ const char *opentags_str = VARDATA_ANY(opentags);
+ const char *closetags_str = VARDATA_ANY(closetags);
+ char *keywords_str = VARDATA_ANY(keywords);
+ char *document_str = VARDATA_ANY(document);
+ uint32 opentags_len = VARSIZE_ANY_EXHDR(opentags);
+ uint32 closetags_len = VARSIZE_ANY_EXHDR(closetags);
+ uint32 keywords_len = VARSIZE_ANY_EXHDR(keywords);
+ uint32 document_len = VARSIZE_ANY_EXHDR(document);
+ uint32 nresults = 0;
+ uint32 max_tagged_len = 0;
+ sen_rc rc;
+ text *result;
+ uint32 result_len = 0;
+ bool return_null = false;
+
+ query = GetSennaQuery(keywords_str, keywords_len);
+
+ snip = sen_query_snip(query, flags, width, max_results, 1,
+ &opentags_str, &opentags_len,
+ &closetags_str, &closetags_len,
+ mapping == 0 ? NULL : (sen_snip_mapping *)-1);
+ if (snip == NULL)
+ ereport(ERROR,
+ (errmsg("sen_query_snip() failed")));
+
+ PG_TRY();
+ {
+ rc = sen_snip_exec(snip, document_str, document_len,
+ &nresults, &max_tagged_len);
+ if (rc != sen_success)
+ ereport(ERROR,
+ (errmsg("sen_snip_exec() failed: %d", rc)));
+
+ result = (text *) palloc(max_tagged_len + VARHDRSZ);
+
+ rc = sen_snip_get_result(snip, 0, VARDATA(result), &result_len);
+ if (rc == sen_invalid_argument)
+ return_null = true;
+ else if (rc != sen_success)
+ ereport(ERROR,
+ (errmsg("sen_snip_get_result() failed: %d", rc)));
+ }
+ PG_CATCH();
+ {
+ sen_snip_close(snip);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ sen_snip_close(snip);
+
+ if (return_null)
+ PG_RETURN_NULL();
+
+ SET_VARSIZE(result, max_tagged_len + VARHDRSZ);
+
+ PG_RETURN_TEXT_P(result);
+}
+
+/*
+ * Make sure there is enough space for 'needed' more bytes.
+ *
+ * Sets **buf to the allocated space which can store the needed bytes if OK,
+ * NULL if failed to enlarge the space because 'needed' is larger than 'maxlen'.
+ */
+static inline void
+pgs2malloc(void **buf, long *buflen, long needed, long maxlen)
+{
+#ifdef PGS2_DEBUG
+ if (pgs2_enable_debug)
+ elog(LOG, "pgs2malloc(): buflen %ld, needed %ld, maxlen %ld",
+ *buflen, needed, maxlen);
+#endif
+
+ if (*buf != NULL && *buflen >= needed && (*buflen <= maxlen || maxlen == 0))
+ return; /* got enough space already */
+
+ /*
+ * Release the already-allocated space since it's too small to
+ * store the needed bytes or larger than the upper limit.
+ */
+ if (*buf != NULL)
+ {
+ free(*buf);
+ *buf = NULL;
+ *buflen = 0;
+ }
+
+ /*
+ * Don't allocate any space if the needed space is larger than
+ * the upper limit.
+ */
+ if (needed > maxlen && maxlen != 0)
+ return;
+
+ /*
+ * Allocate the space for the needed bytes.
+ *
+ * We don't want to allocate just a little more space with each enlarge;
+ * for efficiency, double the buffer size each time it overflows.
+ * Actually, we might need to more than double it if 'needed' is big...
+ *
+ * We check whether '*buflen' overflows each cycle to avoid infinite loop.
+ */
+ *buflen = 1024L;
+ while (*buflen < needed && *buflen != 0)
+ *buflen <<= 1;
+
+ /*
+ * Clamp to maxlen in case we went past it. Note we are assuming
+ * here that maxlen <= LONG_MAX/2, else the above loop could
+ * overflow. We will still have *buflen >= needed.
+ */
+ if (*buflen > maxlen && maxlen != 0)
+ *buflen = maxlen;
+
+ /* Guard against out-of-range '*buflen' value */
+ if (*buflen == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
+ errmsg("out of memory"),
+ errdetail("Cannot enlarge buffer by %ld more bytes.",
+ needed)));
+
+ *buf = (void *) malloc(*buflen);
+ if (*buf == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
+}
+
+Datum
+pgs2norm(PG_FUNCTION_ARGS)
+{
+ text *str = PG_GETARG_TEXT_PP(0);
+ char *s = VARDATA_ANY(str);
+ long slen = VARSIZE_ANY_EXHDR(str);
+ text *result = NULL;
+ long buflen;
+ long reslen;
+ long maxlen;
+ long needed;
+
+ /*
+ * norm_cache is the cache memory storing both input and normalized strings
+ * as the result of pgs2norm(). norm_cache_size is the size of norm_cache
+ * and its upper limit is specified by norm_cache_limit parameter. norm_result
+ * is the pointer to the normalized string with the verlena header (i.e.,
+ * text type) stored in the latter half of the cache. norm_reslen is the size
+ * of norm_result. norm_slen is the size of the input string which is stored
+ * in the first half of the cache.
+ */
+ static char *norm_cache = NULL;
+ static long norm_cache_size = 0;
+ static long norm_slen = 0;
+ static char *norm_result = NULL;
+ static long norm_reslen = 0;
+
+ /*
+ * Return the cached normalization result if the same string of
+ * the given one has been normalized the last time.
+ */
+ if (norm_cache != NULL &&
+ norm_slen == slen &&
+ strncmp(norm_cache, s, slen) == 0)
+ {
+#ifdef PGS2_DEBUG
+ if (pgs2_enable_debug)
+ {
+ char *tmp = text_to_cstring(str);
+
+ elog(LOG, "pgs2norm(): quick exit: %s", tmp);
+ pfree(tmp);
+ }
+#endif
+
+ PG_RETURN_TEXT_P(pnstrdup(norm_result, norm_reslen));
+ }
+
+ /* Confirm that database encoding is UTF-8 */
+ GetSennaEncoding();
+
+ /*
+ * Allocate the result buffer to store the normalized string. Since the size of
+ * normalized string can be larger than that of input one, the result buffer needs
+ * extra space. Problem is that, before calling sen_str_normalize, we need to
+ * allocate the result buffer but cannot know how large extra space is required.
+ * So we use RESULT_EXTRA_SIZE as the estimated size of extra space here.
+ */
+#define RESULT_EXTRA_SIZE 64
+ buflen = slen + RESULT_EXTRA_SIZE;
+
+retry:
+ result = (text *) palloc(buflen + VARHDRSZ);
+
+#if defined(FAST_SENNA)
+ reslen = fast_sen_str_normalize(s, slen, VARDATA(result), buflen);
+#else
+ reslen = sen_str_normalize(s, slen, sen_enc_utf8,
+ SEN_NORMALIZE_FLAGS,
+ VARDATA(result), buflen);
+#endif
+
+ if (reslen < 0)
+ ereport(ERROR,
+ (errmsg("could not normalize the string")));
+
+ /*
+ * If the result buffer size is too short to store the normalized string,
+ * we enlarge the buffer and retry the string normalization.
+ */
+ if (buflen <= reslen)
+ {
+ pfree(result);
+ buflen = reslen + 1;
+ goto retry;
+ }
+
+ SET_VARSIZE(result, reslen + VARHDRSZ);
+
+ /*
+ * Cache both input and normalized strings to accelerate the subsequent
+ * calls of pgs2norm() with the same input string. But we don't do that
+ * if the maximum allowed size of the cache is too small to store them.
+ */
+ needed = slen + reslen + VARHDRSZ;
+ maxlen = ((norm_cache_limit >= 0) ? norm_cache_limit : work_mem) * 1024L;
+
+ pgs2malloc((void **) &norm_cache, &norm_cache_size, needed, maxlen);
+ if (norm_cache != NULL)
+ {
+ /* Store the input string into the first half of the cache */
+ norm_slen = slen;
+ memcpy(norm_cache, s, slen);
+
+ /*
+ * Store the normalized string with the varlena header (i.e., text type)
+ * into the latter half of the cache.
+ */
+ norm_result = norm_cache + slen;
+ norm_reslen = reslen + VARHDRSZ;
+ memcpy(norm_result, result, norm_reslen);
+ }
+
+#ifdef PGS2_DEBUG
+ if (pgs2_enable_debug)
+ {
+ char *tmp = text_to_cstring(str);
+
+ elog(LOG, "pgs2norm(): complete (%s result cache): %s",
+ (norm_cache == NULL) ? "unset" : "set", tmp);
+ pfree(tmp);
+ }
+#endif
+
+ PG_RETURN_TEXT_P(result);
+}
+
+/*
+ * Report the version and configure options of Senna which
+ * ludia_funcs depends on.
+ */
+Datum
+pgs2seninfo(PG_FUNCTION_ARGS)
+{
+ char *version[MAXPGPATH];
+ char *coptions[MAXPGPATH];
+ Datum values[2];
+ bool isnull[2];
+ HeapTuple tuple;
+ TupleDesc tupdesc;
+
+ /*
+ * Get the version and configure options of Senna. Ignore the
+ * return value of sen_info() because it always returns a success.
+ */
+ sen_info((char **)&version, (char **)&coptions, NULL, NULL, NULL, NULL);
+
+ /*
+ * Construct a tuple descriptor for the result row. This must
+ * match this function's ludia_funcs--x.x.sql entry.
+ */
+ tupdesc = CreateTemplateTupleDesc(2, false);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 1,
+ "version", TEXTOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 2,
+ "configure_options", TEXTOID, -1, 0);
+ tupdesc = BlessTupleDesc(tupdesc);
+
+ /* version */
+ values[0] = CStringGetTextDatum(*version);
+ isnull[0] = false;
+
+ /* configure option */
+ values[1] = CStringGetTextDatum(*coptions);
+ isnull[1] = false;
+
+ tuple = heap_form_tuple(tupdesc, values, isnull);
+ PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
+}
--- /dev/null
+# ludia_funcs extension
+comment = 'ludia functions'
+default_version = '1.0'
+module_pathname = '$libdir/ludia_funcs'
+relocatable = true
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * Copyright (c) 2006-2013, NTT DATA Corporation
+ * All rights reserved.
+ *
+ * Changelog:
+ * 2013/01/09
+ * Update Ludia functions so that they are available with PostgreSQL9.1.
+ * Author: NTT DATA Corporation
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef __LUDIA_FUNCS_H__
+#define __LUDIA_FUNCS_H__
+
+#ifdef TEXTPORTER
+int ExecTextPorter(unsigned char *Appfile, unsigned char *Txtfile,
+ unsigned char *GroupName, unsigned char *DefLangName,
+ int bBigEndian, unsigned int Option,
+ unsigned int Option1, long Size, unsigned short Csv_c);
+#endif /* TEXTPORTER */
+
+#endif /* __LUDIA_FUNCS_H */
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * Copyright (c) 2006-2013, NTT DATA Corporation
+ * All rights reserved.
+ *
+ * Changelog:
+ * 2013/01/09
+ * Update Ludia functions so that they are available with PostgreSQL9.1.
+ * Author: NTT DATA Corporation
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifdef TEXTPORTER
+#include "ludia_funcs.h"
+
+#include <string.h>
+#include <text_oem.h>
+
+int
+ExecTextPorter(unsigned char *Appfile, unsigned char *Txtfile,
+ unsigned char *GroupName, unsigned char *DefLangName,
+ int bBigEndian, unsigned int Option,
+ unsigned int Option1, long Size, unsigned short Csv_c)
+{
+ DMC_TEXTINFO_V5 textinfo;
+
+ strncpy((char *)textinfo.GroupName, (const char *)GroupName, MAX_GROUP_NAME);
+ strncpy((char *)textinfo.DefLangName, (const char *)DefLangName, MAX_LANG_NAME);
+ textinfo.bBigEndian = bBigEndian;
+ textinfo.Option = Option;
+ textinfo.Option1 = Option1;
+ textinfo.Size = Size;
+ textinfo.Csv_c = Csv_c;
+
+ return DMC_GetText_V5((Byte *)Appfile, (Byte *)Txtfile,
+ &textinfo, NULL);
+}
+
+#endif /* TEXTPORTER */
--- /dev/null
+LOAD '$libdir/ludia_funcs';
+CREATE EXTENSION ludia_funcs;
+
+SET standard_conforming_strings TO off;
+SET escape_string_warning TO off;
+
+\pset null '(null)'
+
+SET ludia_funcs.escape_snippet_keyword TO on;
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"￥"', '\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"￥"', '￥');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '￥');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"”"', '"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"”"', '”');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '”');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', '\\\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', '\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '""');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""""', '""');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""""', '"');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', 'あ\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', '\\あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', 'あ\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', '\\あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', '\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', '\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ\\"', 'あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\あ"', 'あ');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', 'あ"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', '"あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', 'あ"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', '"あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', '"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', '"');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ""', 'あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""あ"', 'あ');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'う\\え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\"', 'う\\え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\え"', 'う\\え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\"', 'う\\え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\"', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\え"', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う\\え"', 'う');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'う"え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う""', 'う"え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""え"', 'う"え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"""', 'う"え');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う""', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""え"', 'うえ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"う"え"', 'う');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', 'あいう\\えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\\\"', 'あいう\\\\えお');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\""', 'あいう"えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"\\""', 'あいう\\"えお');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"+"', '+');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"+"', 'あいう+えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""+"', 'あいう"+えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"-"', '-');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"-"', 'あいう-えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""-"', 'あいう"-えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '" え"', 'あいう えお');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"" え"', 'あいう" えお');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '', 'あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, 'あ', '');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"あ"', '');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '+', '+"\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"', '+"\\');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '\\', '+"\\');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '""', 'あ', 1);
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"BB"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+""B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"+B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"+"\\B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"BB"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+""B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"+B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A""+"\\B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"BB"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+""B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"+B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A+"+"\\B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"BB"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+""B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"+B"', 'AA"A+A\\B+B"BB');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"A\\"+"\\B"', 'AA"A+A\\B+B"BB');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AB"CD"', 'AB"CD');
+SET ludia_funcs.escape_snippet_keyword TO off;
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AB"CD"', 'AB"CD');
+
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" + "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA\\"A" - "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+
+SET ludia_funcs.escape_snippet_keyword TO on;
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" + "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" + "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" "CCC"', 'AA"ABBBCCCDDDEEE');
+SELECT pgs2snippet1(1, 300, 1, '@', '@', 0, '"AA"A" - "BBB" - "CCC"', 'AA"ABBBCCCDDDEEE');
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