Add Kyoto Cabinet DBM support.

* libmu_dbm/kyoto.c: New file.
* libmu_dbm/dbm.c: Update.
* libmu_dbm/mudbm.h: Update.
* libmu_dbm/Makefile.am: (libmu_dbm_la_SOURCES): Add kyoto.c
* configure.ac: Add --with-kyotocabinet.
* README: Update.
* doc/texinfo/programs.texi: Likewise.
* libmailutils/base/version.c: Likewise.

@@ -287,6 +287,11 @@ use DBM-based mail box quotas with maildag.
 
 	Use Tokyo Cabinet DBM
 
+    --with-kyotocabinet
+
+	Use Kyoto Cabinet DBM
+
+
 Use following options to disable support for particular protocols or
 features:
 

@@ -413,6 +413,16 @@ case "${withval}" in
   *)   AC_MSG_ERROR(bad value ${withval} for --with-tokyocabinet) ;;
 esac])
 
+AC_ARG_WITH([kyotocabinet],
+            AC_HELP_STRING([--with-kyotocabinet],
+                           [use Kyoto Cabinet]),
+            [
+case "${withval}" in
+  yes) enable_dbm="$enable_dbm KC";;
+  no)  disable_dbm="$disable_dbm KC";;
+  *)   AC_MSG_ERROR(bad value ${withval} for --with-kyotocabinet) ;;
+esac])
+
 dnl Check for DBM
 
 AH_TEMPLATE([WITH_BDB],
@@ -551,6 +561,15 @@ check_dbm_impl() {
 		       DBMLIB_DEPENDENCY="$DBMLIB_DEPENDENCY -lz -lbz2 -lrt"
                        DBMLIBS="$DBMLIBS -ltokyocabinet"
                        status_dbm="$status_dbm,Tokyo Cabinet"]);;
+
+  KC)
+	  AC_CHECK_LIB(kyotocabinet, kcdbnew,
+                       [AC_CHECK_HEADERS(kclangc.h,
+                                         AC_DEFINE(WITH_KYOTOCABINET,1,
+                                                 [Enable use of Kyoto Cabinet]))
+		       DBMLIB_DEPENDENCY="$DBMLIB_DEPENDENCY -lz -lbz2 -lrt"
+                       DBMLIBS="$DBMLIBS -lkyotocabinet"
+                       status_dbm="$status_dbm,Kyoto Cabinet"]);;
   esac
 }
 

@@ -5649,8 +5649,8 @@ The mailbox quota can be retrieved from the following sources:
 To use @acronym{DBM} quota database, GNU Mailutils must
 be compiled with one of the following command line options:
 @option{--with-gdbm}, @option{--with-berkeley-db}, @option{--with-ndbm},
-or @option{--with-tokyocabinet}.  Examine the output of @command{maidag
---show-config-options}, if not sure. 
+@option{--with-tokyocabinet}, or @option{--with-kyotocabinet}.
+Examine the output of @command{maidag --show-config-options}, if not sure. 
 
 The quota database should have the following structure:
 

@@ -61,6 +61,9 @@ static struct mu_conf_option mu_conf_option[] = {
 #ifdef WITH_TOKYOCABINET
   { "WITH_TOKYOCABINET", N_("Tokyo Cabinet DBM") },
 #endif
+#ifdef WITH_KYOTOCABINET
+  { "WITH_KYOTOCABINET", N_("Kyoto Cabinet DBM") },
+#endif
 #ifdef WITH_GNUTLS
   { "WITH_GNUTLS", N_("TLS support using GNU TLS") },
 #endif

@@ -36,6 +36,7 @@ libmu_dbm_la_SOURCES = \
  store.c\
  berkeley.c\
  gdbm.c\
+ kyoto.c\
  ndbm.c\
  tokyo.c
 

@@ -83,6 +83,9 @@ mu_dbm_init ()
 #ifdef WITH_TOKYOCABINET
   mu_dbm_register (&_mu_dbm_tokyocabinet);
 #endif
+#ifdef WITH_KYOTOCABINET
+  mu_dbm_register (&_mu_dbm_kyotocabinet);
+#endif
   if (!mu_dbm_hint)
     {
       struct mu_dbm_impl *impl;

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see
+   <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <mailutils/types.h>
+#include <mailutils/dbm.h>
+#include <mailutils/util.h>
+#include <mailutils/errno.h>
+#include <mailutils/error.h>
+#include <mailutils/stream.h>
+#include <mailutils/io.h>
+#include "mudbm.h"
+
+#if defined(WITH_KYOTOCABINET)
+#include <kclangc.h>
+
+struct kc_descr
+{
+  KCDB *db;    /* db */
+  KCCUR *cur;  /* cursor */
+};
+
+static int
+_kc_file_safety (mu_dbm_file_t db, int mode, uid_t owner)
+{
+  return mu_file_safety_check (db->db_name, mode, owner, NULL);
+}
+
+int
+_kc_get_fd (mu_dbm_file_t db, int *pag, int *dir)
+{
+  return ENOSYS;
+}
+
+static int
+_kc_open (mu_dbm_file_t db, int flags, int mode)
+{
+  struct kc_descr *kcd;
+  int f, result;
+  mode_t save_um;
+  KCDB *kdb;
+
+  switch (flags)
+    {
+    case MU_STREAM_CREAT:
+      f = KCOWRITER | KCOCREATE;
+      break;
+
+    case MU_STREAM_READ:
+      f = KCOREADER;
+      break;
+
+    case MU_STREAM_RDWR:
+      f = KCOREADER | KCOWRITER;
+      break;
+
+    default:
+      return EINVAL;
+    }
+
+  kdb = kcdbnew ();
+
+  save_um = umask (0666 & ~mode);
+  result = kcdbopen (kdb, db->db_name, f);
+  umask (save_um);
+  if (!result)
+    {
+      db->db_errno.n = kcdbecode (kdb);
+      return MU_ERR_FAILURE;
+    }
+
+  kcd = calloc (1, sizeof (*kcd));
+  kcd->db = kdb;
+  kcd->cur = NULL;
+  db->db_descr = kcd;
+  return 0;
+}
+
+static int
+_kc_close (mu_dbm_file_t db)
+{
+  if (db->db_descr)
+    {
+      struct kc_descr *kcd = db->db_descr;
+      kcdbclose (kcd->db);
+      kcdbdel (kcd->db);
+      free (kcd);
+      db->db_descr = NULL;
+    }
+  return 0;
+}
+
+static int
+_kc_fetch (mu_dbm_file_t db, struct mu_dbm_datum const *key,
+	   struct mu_dbm_datum *ret)
+{
+  struct kc_descr *kcd = db->db_descr;
+  void *ptr;
+  size_t retsize;
+
+  ptr = kcdbget (kcd->db, key->mu_dptr, key->mu_dsize, &retsize);
+  if (ptr)
+    {
+      mu_dbm_datum_free (ret);
+      ret->mu_dptr = ptr;
+      ret->mu_dsize = retsize;
+      return 0;
+    }
+  else if ((db->db_errno.n = kcdbecode (kcd->db)) == KCENOREC)
+    return MU_ERR_NOENT;
+  return MU_ERR_FAILURE;
+}
+
+static int
+_kc_store (mu_dbm_file_t db,
+	   struct mu_dbm_datum const *key,
+	   struct mu_dbm_datum const *contents,
+	   int replace)
+{
+  struct kc_descr *kcd = db->db_descr;
+  int result;
+
+  if (replace)
+    result = kcdbreplace (kcd->db, key->mu_dptr, key->mu_dsize,
+			  contents->mu_dptr, contents->mu_dsize);
+  else
+    result = kcdbadd (kcd->db, key->mu_dptr, key->mu_dsize,
+		      contents->mu_dptr, contents->mu_dsize);
+  if (result)
+    return 0;
+  db->db_errno.n = kcdbecode (kcd->db);
+  if (db->db_errno.n == KCEDUPREC)
+    return MU_ERR_EXISTS;
+  return MU_ERR_FAILURE;
+}
+
+static int
+_kc_delete (mu_dbm_file_t db, struct mu_dbm_datum const *key)
+{
+  struct kc_descr *kcd = db->db_descr;
+
+  if (kcdbremove (kcd->db, key->mu_dptr, key->mu_dsize))
+    return 0;
+  db->db_errno.n = kcdbecode (kcd->db);
+  if (db->db_errno.n == KCENOREC)
+    return MU_ERR_NOENT;
+  return MU_ERR_FAILURE;
+}
+
+static int
+_kc_firstkey (mu_dbm_file_t db, struct mu_dbm_datum *ret)
+{
+  struct kc_descr *kcd = db->db_descr;
+  void *ptr;
+  size_t retsize;
+
+  kcd->cur = kcdbcursor (kcd->db);
+  kccurjump (kcd->cur);
+
+  ptr = kccurgetkey (kcd->cur, &retsize, 1);
+  if (ptr)
+    {
+      mu_dbm_datum_free (ret);
+      ret->mu_dptr = ptr;
+      ret->mu_dsize = retsize;
+      return 0;
+    }
+  else if ((db->db_errno.n = kcdbecode (kcd->db)) == KCENOREC)
+    {
+      kccurdel (kcd->cur);
+      kcd->cur = NULL;
+      return MU_ERR_NOENT;
+    }
+  return MU_ERR_FAILURE;
+}
+
+static int
+_kc_nextkey (mu_dbm_file_t db, struct mu_dbm_datum *ret)
+{
+  struct kc_descr *kcd = db->db_descr;
+  void *ptr;
+  size_t retsize;
+
+  ptr = kccurgetkey (kcd->cur, &retsize, 1);
+  if (ptr)
+    {
+      mu_dbm_datum_free (ret);
+      ret->mu_dptr = ptr;
+      ret->mu_dsize = retsize;
+      return 0;
+    }
+  else if ((db->db_errno.n = kcdbecode (kcd->db)) == KCENOREC)
+    {
+      kccurdel (kcd->cur);
+      kcd->cur = NULL;
+      return MU_ERR_NOENT;
+    }
+  return MU_ERR_FAILURE;
+}
+
+static void
+_kc_datum_free (struct mu_dbm_datum *datum)
+{
+  free (datum->mu_dptr);
+}
+
+static char const *
+_kc_strerror (mu_dbm_file_t db)
+{
+  return kcecodename (db->db_errno.n);
+}
+
+struct mu_dbm_impl _mu_dbm_kyotocabinet = {
+  "kc",
+  _kc_file_safety,
+  _kc_get_fd,
+  _kc_open,
+  _kc_close,
+  _kc_fetch,
+  _kc_store,
+  _kc_delete,
+  _kc_firstkey,
+  _kc_nextkey,
+  _kc_datum_free,
+  _kc_strerror
+};
+#endif

@@ -42,6 +42,9 @@ extern struct mu_dbm_impl _mu_dbm_ndbm;
 #ifdef WITH_TOKYOCABINET
 extern struct mu_dbm_impl _mu_dbm_tokyocabinet;
 #endif
+#ifdef WITH_KYOTOCABINET
+extern struct mu_dbm_impl _mu_dbm_kyotocabinet;
+#endif
 
 void _mu_dbm_init (void);