Initial revision

1 files changed, 866 insertions, 0 deletions

diff --git a/kmicromail/libetpan/generic/mhdriver.c b/kmicromail/libetpan/generic/mhdriver.c
new file mode 100644
index 0000000..af38d27
--- a/dev/null
+++ b/kmicromail/libetpan/generic/mhdriver.c
@@ -0,0 +1,866 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2002 - DINH Viet Hoa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the libEtPan! project nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * $Id$
+ */
+
+#include "mhdriver.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "mailmh.h"
+#include "maildriver_tools.h"
+#include "mhdriver_tools.h"
+#include "mhdriver_message.h"
+#include "mailmessage.h"
+
+static int mhdriver_initialize(mailsession * session);
+
+static void mhdriver_uninitialize(mailsession * session);
+
+static int mhdriver_connect_path(mailsession * session, char * path);
+static int mhdriver_logout(mailsession * session);
+
+static int mhdriver_build_folder_name(mailsession * session, char * mb,
+				      char * name, char ** result);
+static int mhdriver_create_folder(mailsession * session, char * mb);
+
+static int mhdriver_delete_folder(mailsession * session, char * mb);
+
+static int mhdriver_rename_folder(mailsession * session, char * mb,
+				  char * new_name);
+
+static int mhdriver_select_folder(mailsession * session, char * mb);
+
+static int mhdriver_status_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen);
+
+static int mhdriver_messages_number(mailsession * session, char * mb,
+				    uint32_t * result);
+
+static int mhdriver_list_folders(mailsession * session, char * mb,
+				 struct mail_list ** result);
+
+static int mhdriver_lsub_folders(mailsession * session, char * mb,
+				 struct mail_list ** result);
+
+static int mhdriver_subscribe_folder(mailsession * session, char * mb);
+
+static int mhdriver_unsubscribe_folder(mailsession * session, char * mb);
+
+static int mhdriver_append_message(mailsession * session,
+				   char * message, size_t size);
+static int mhdriver_copy_message(mailsession * session,
+				 uint32_t num, char * mb);
+
+static int mhdriver_remove_message(mailsession * session, uint32_t num);
+
+static int mhdriver_move_message(mailsession * session,
+				 uint32_t num, char * mb);
+
+static int mhdriver_get_messages_list(mailsession * session,
+				      struct mailmessage_list ** result);
+
+static int mhdriver_get_message(mailsession * session,
+				uint32_t num, mailmessage ** result);
+
+static int mhdriver_get_message_by_uid(mailsession * session,
+    const char * uid,
+    mailmessage ** result);
+
+static mailsession_driver local_mh_session_driver = {
+  .sess_name = "mh",
+
+  .sess_initialize = mhdriver_initialize,
+  .sess_uninitialize = mhdriver_uninitialize,
+
+  .sess_parameters = NULL,
+
+  .sess_connect_stream = NULL,
+  .sess_connect_path = mhdriver_connect_path,
+  .sess_starttls = NULL,
+  .sess_login = NULL,
+  .sess_logout = mhdriver_logout,
+  .sess_noop = NULL,
+
+  .sess_build_folder_name = mhdriver_build_folder_name,
+  .sess_create_folder = mhdriver_create_folder,
+  .sess_delete_folder = mhdriver_delete_folder,
+  .sess_rename_folder = mhdriver_rename_folder,
+  .sess_check_folder = NULL,
+  .sess_examine_folder = NULL,
+  .sess_select_folder = mhdriver_select_folder,
+  .sess_expunge_folder = NULL,
+  .sess_status_folder = mhdriver_status_folder,
+  .sess_messages_number = mhdriver_messages_number,
+  .sess_recent_number = mhdriver_messages_number,
+  .sess_unseen_number = mhdriver_messages_number,
+  .sess_list_folders = mhdriver_list_folders,
+  .sess_lsub_folders = mhdriver_lsub_folders,
+  .sess_subscribe_folder = mhdriver_subscribe_folder,
+  .sess_unsubscribe_folder = mhdriver_unsubscribe_folder,
+
+  .sess_append_message = mhdriver_append_message,
+  .sess_copy_message = mhdriver_copy_message,
+  .sess_move_message = mhdriver_move_message,
+
+  .sess_get_messages_list = mhdriver_get_messages_list,
+  .sess_get_envelopes_list = maildriver_generic_get_envelopes_list,
+  .sess_remove_message = mhdriver_remove_message,
+#if 0
+  .sess_search_messages = maildriver_generic_search_messages,
+#endif
+
+  .sess_get_message = mhdriver_get_message,
+  .sess_get_message_by_uid = mhdriver_get_message_by_uid,
+};
+
+mailsession_driver * mh_session_driver = &local_mh_session_driver;
+
+static inline struct mh_session_state_data * get_data(mailsession * session)
+{
+  return session->sess_data;
+}
+
+static inline struct mailmh * get_mh_session(mailsession * session)
+{
+  return get_data(session)->mh_session;
+}
+
+static inline struct mailmh_folder * get_mh_cur_folder(mailsession * session)
+{
+  return get_data(session)->mh_cur_folder;
+}
+
+static int add_to_list(mailsession * session, char * mb)
+{
+  char * new_mb;
+  struct mh_session_state_data * data;
+  int r;
+
+  data = get_data(session);
+
+  new_mb = strdup(mb);
+  if (new_mb == NULL)
+    return -1;
+
+  r = clist_append(data->mh_subscribed_list, new_mb);
+  if (r < 0) {
+    free(mb);
+    return -1;
+  }
+
+  return 0;
+}
+
+static int remove_from_list(mailsession * session, char * mb)
+{
+  clistiter * cur;
+  struct mh_session_state_data * data;
+
+  data = get_data(session);
+
+  for(cur = clist_begin(data->mh_subscribed_list) ;
+      cur != NULL ; cur = clist_next(cur)) {
+    char * cur_name;
+
+    cur_name = clist_content(cur);
+    if (strcmp(cur_name, mb) == 0) {
+      clist_delete(data->mh_subscribed_list, cur);
+      free(cur_name);
+      return 0;
+    }
+  }
+
+  return -1;
+}
+
+static int mhdriver_initialize(mailsession * session)
+{
+  struct mh_session_state_data * data;
+
+  data = malloc(sizeof(* data));
+  if (data == NULL)
+    goto err;
+
+  data->mh_session = NULL;
+  data->mh_cur_folder = NULL;
+
+  data->mh_subscribed_list = clist_new();
+  if (data->mh_subscribed_list == NULL)
+    goto free;
+
+  session->sess_data = data;
+  
+  return MAIL_NO_ERROR;
+
+ free:
+  free(data);
+ err:
+  return MAIL_ERROR_MEMORY;
+}
+
+static void mhdriver_uninitialize(mailsession * session)
+{
+  struct mh_session_state_data * data;
+
+  data = get_data(session);
+
+  if (data->mh_session != NULL)
+    mailmh_free(data->mh_session);
+
+  clist_foreach(data->mh_subscribed_list, (clist_func) free, NULL);
+  clist_free(data->mh_subscribed_list);
+
+  free(data);
+  
+  session->sess_data = NULL;
+}
+
+
+static int mhdriver_connect_path(mailsession * session, char * path)
+{
+  struct mailmh * mh;
+
+  if (get_mh_session(session) != NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  mh = mailmh_new(path);
+  if (mh == NULL)
+    return MAIL_ERROR_MEMORY;
+  
+  get_data(session)->mh_session = mh;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mhdriver_logout(mailsession * session)
+{
+  struct mailmh * mh;
+
+  mh = get_mh_session(session);
+
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  mailmh_free(mh);
+  get_data(session)->mh_session = NULL;
+
+  return MAIL_NO_ERROR;
+}
+
+/* folders operations */
+
+static int mhdriver_build_folder_name(mailsession * session, char * mb,
+				      char * name, char ** result)
+{
+  char * folder_name;
+
+  folder_name = malloc(strlen(mb) + 2 + strlen(name));
+  if (folder_name == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  strcpy(folder_name, mb);
+  strcat(folder_name, "/");
+  strcat(folder_name, name);
+
+  * result = folder_name;
+  
+  return MAIL_NO_ERROR;
+}
+
+static int get_parent(mailsession * session, char * mb,
+		      struct mailmh_folder ** result_folder,
+		      char ** result_name)
+{
+  char * name;
+  size_t length;
+  int i;
+  char * parent_name;
+  struct mailmh_folder * parent;
+  struct mailmh * mh;
+
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  length = strlen(mb);
+  for(i = length - 1 ; i >= 0 ; i--)
+    if (mb[i] == '/')
+      break;
+  name = mb + i + 1;
+
+  parent_name = malloc(i + 1);
+  /* strndup(mb, i) */
+  if (parent_name == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  strncpy(parent_name, mb, i);
+  parent_name[i] = '\0';
+
+  parent = mailmh_folder_find(mh->mh_main, parent_name);
+  free(parent_name);
+  if (parent == NULL)
+    return MAIL_ERROR_FOLDER_NOT_FOUND;
+
+  * result_folder = parent;
+  * result_name = name;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mhdriver_create_folder(mailsession * session, char * mb)
+{
+  int r;
+  struct mailmh_folder * parent;
+  char * name;
+  
+  r = get_parent(session, mb, &parent, &name);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  r = mailmh_folder_add_subfolder(parent, name);
+  
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+static int mhdriver_delete_folder(mailsession * session, char * mb)
+{
+  int r;
+  struct mailmh_folder * folder;
+  struct mailmh * mh;
+
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  folder = mailmh_folder_find(mh->mh_main, mb);
+  if (folder == NULL)
+    return MAIL_ERROR_FOLDER_NOT_FOUND;
+
+  if (get_mh_cur_folder(session) == folder)
+    get_data(session)->mh_cur_folder = NULL;
+
+  r = mailmh_folder_remove_subfolder(folder);
+
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+static int mhdriver_rename_folder(mailsession * session, char * mb,
+				  char * new_name)
+{
+  struct mailmh_folder * src_folder;
+  struct mailmh_folder * dst_folder;
+  char * name;
+  struct mailmh * mh;
+  int r;
+
+  r = get_parent(session, new_name, &dst_folder, &name);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  src_folder = mailmh_folder_find(mh->mh_main, mb);
+  if (src_folder == NULL)
+    return MAIL_ERROR_FOLDER_NOT_FOUND;
+
+  if (get_mh_cur_folder(session) == src_folder)
+    get_data(session)->mh_cur_folder = NULL;
+  
+  r = mailmh_folder_rename_subfolder(src_folder, dst_folder, name);  
+
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+static int mhdriver_select_folder(mailsession * session, char * mb)
+{
+  struct mailmh_folder * folder;
+  struct mailmh * mh;
+  int r;
+
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  r = mailmh_folder_update(mh->mh_main);
+  
+  folder = mailmh_folder_find(mh->mh_main, mb);
+  if (folder == NULL)
+    return MAIL_ERROR_FOLDER_NOT_FOUND;
+
+  get_data(session)->mh_cur_folder = folder;
+  r = mailmh_folder_update(folder);
+
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+static int mhdriver_status_folder(mailsession * session, char * mb,
+    uint32_t * result_messages, uint32_t * result_recent,
+    uint32_t * result_unseen)
+{
+  uint32_t count;
+  int r;
+  
+  r = mhdriver_messages_number(session, mb, &count);
+  if (r != MAIL_NO_ERROR)
+    return r;
+  
+  * result_messages = count;
+  * result_recent = count;
+  * result_unseen = count;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mhdriver_messages_number(mailsession * session, char * mb,
+				    uint32_t * result)
+{
+  struct mailmh_folder * folder;
+  uint32_t count;
+  struct mailmh * mh;
+  unsigned int i;
+
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  if (mb != NULL) {
+    folder = mailmh_folder_find(mh->mh_main, mb);
+    if (folder == NULL)
+      return MAIL_ERROR_FOLDER_NOT_FOUND;
+  }
+  else {
+    folder = get_mh_cur_folder(session);
+    if (folder == NULL)
+      return MAIL_ERROR_BAD_STATE;
+  }
+
+  mailmh_folder_update(folder);
+  count = 0;
+  for (i = 0 ; i < carray_count(folder->fl_msgs_tab) ; i ++) {
+    struct mailmh_msg_info * msg_info;
+    
+    msg_info = carray_get(folder->fl_msgs_tab, i);
+    if (msg_info != NULL)
+      count ++;
+  }
+  
+  * result = count;
+
+  return MAIL_NO_ERROR;
+}
+
+
+static int get_list_folders(struct mailmh_folder * folder, clist ** result)
+{
+  unsigned int i;
+  clist * list;
+  char * new_filename;
+  int res;
+  int r;
+
+  list = * result;
+
+  new_filename = strdup(folder->fl_filename);
+  if (new_filename == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto free;
+  }
+
+  r = mailmh_folder_update(folder);
+
+  switch (r) {
+  case MAILMH_NO_ERROR:
+    break;
+
+  default:
+    res = mhdriver_mh_error_to_mail_error(r);
+    goto free;
+  }
+
+  r = clist_append(list, new_filename);
+  if (r < 0) {
+    free(new_filename);
+    res = MAIL_ERROR_MEMORY;
+    goto free;
+  }
+  
+  if (folder->fl_subfolders_tab != NULL) {
+    for(i = 0 ; i < carray_count(folder->fl_subfolders_tab) ; i++) {
+      struct mailmh_folder * subfolder;
+
+      subfolder = carray_get(folder->fl_subfolders_tab, i);
+
+      r = get_list_folders(subfolder, &list);
+      if (r != MAIL_NO_ERROR) {
+	res = MAIL_ERROR_MEMORY;
+	goto free;
+      }
+    }
+  }
+
+  * result = list;
+  
+  return MAIL_NO_ERROR;
+
+ free:
+  clist_foreach(list, (clist_func) free, NULL);
+  clist_free(list);
+  return res;
+}
+
+
+static int mhdriver_list_folders(mailsession * session, char * mb,
+				 struct mail_list ** result)
+{
+  clist * list;
+  int r;
+  struct mailmh * mh;
+  struct mail_list * ml;
+
+  mh = get_mh_session(session);
+
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  list = clist_new();
+  if (list == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  r =  get_list_folders(mh->mh_main, &list);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  ml = mail_list_new(list);
+  if (ml == NULL)
+    goto free;
+
+  * result = ml;
+
+  return MAIL_NO_ERROR;
+
+ free:
+  clist_foreach(list, (clist_func) free, NULL);
+  clist_free(list);
+  return MAIL_ERROR_MEMORY;
+}
+
+static int mhdriver_lsub_folders(mailsession * session, char * mb,
+				 struct mail_list ** result)
+{
+  clist * subscribed;
+  clist * lsub_result;
+  clistiter * cur;
+  struct mail_list * lsub;
+  size_t length;
+  int r;
+
+  length = strlen(mb);
+
+  subscribed = get_data(session)->mh_subscribed_list;
+
+  lsub_result = clist_new();
+  if (lsub_result == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  for(cur = clist_begin(subscribed) ; cur != NULL ;
+      cur = clist_next(cur)) {
+    char * cur_mb;
+    char * new_mb;
+    
+    cur_mb = clist_content(cur);
+
+    if (strncmp(mb, cur_mb, length) == 0) {
+      new_mb = strdup(cur_mb);
+      if (new_mb == NULL)
+	goto free_list;
+      
+      r = clist_append(lsub_result, new_mb);
+      if (r < 0) {
+	free(new_mb);
+	goto free_list;
+      }
+    }
+  }    
+  
+  lsub = mail_list_new(lsub_result);
+  if (lsub == NULL)
+    goto free_list;
+
+  * result = lsub;
+
+  return MAIL_NO_ERROR;
+
+ free_list:
+  clist_foreach(lsub_result, (clist_func) free, NULL);
+  clist_free(lsub_result);
+  return MAIL_ERROR_MEMORY;
+}
+
+static int mhdriver_subscribe_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = add_to_list(session, mb);
+  if (r < 0)
+    return MAIL_ERROR_SUBSCRIBE;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mhdriver_unsubscribe_folder(mailsession * session, char * mb)
+{
+  int r;
+
+  r = remove_from_list(session, mb);
+  if (r < 0)
+    return MAIL_ERROR_UNSUBSCRIBE;
+
+  return MAIL_NO_ERROR;
+}
+
+/* messages operations */
+
+static int mhdriver_append_message(mailsession * session,
+				   char * message, size_t size)
+{
+  int r;
+  struct mailmh_folder * folder;
+
+  folder = get_mh_cur_folder(session);
+  if (folder == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  r = mailmh_folder_add_message(folder, message, size);
+
+  switch (r) {
+  case MAILMH_ERROR_FILE:
+    return MAIL_ERROR_DISKSPACE;
+
+  default:
+    return mhdriver_mh_error_to_mail_error(r);
+  }
+}
+
+static int mhdriver_copy_message(mailsession * session,
+				 uint32_t num, char * mb)
+{
+  int fd;
+  int r;
+  struct mailmh_folder * folder;
+  struct mailmh * mh;
+  int res;
+
+  mh = get_mh_session(session);
+  if (mh == NULL) {
+    res = MAIL_ERROR_BAD_STATE;
+    goto err;
+  }
+
+  folder = get_mh_cur_folder(session);
+  if (folder == NULL) {
+    res = MAIL_ERROR_BAD_STATE;
+    goto err;
+  }
+
+  r = mailmh_folder_get_message_fd(folder, num, O_RDONLY, &fd);
+  if (r != MAIL_NO_ERROR) {
+    res = r;
+    goto err;
+  }
+
+  folder = mailmh_folder_find(mh->mh_main, mb);
+  if (folder == NULL) {
+    res = MAIL_ERROR_FOLDER_NOT_FOUND;
+    goto close;
+  }
+
+  r = mailmh_folder_add_message_file(folder, fd);
+  if (r != MAIL_NO_ERROR) {
+    res = MAIL_ERROR_COPY;
+    goto close;
+  }
+
+  close(fd);
+
+  return MAIL_NO_ERROR;
+  
+ close:
+  close(fd);
+ err:
+  return res;
+}
+
+static int mhdriver_remove_message(mailsession * session, uint32_t num)
+{
+  int r;
+  struct mailmh_folder * folder;
+
+  folder = get_mh_cur_folder(session);
+  if (folder == NULL)
+    return MAIL_ERROR_DELETE;
+
+  r = mailmh_folder_remove_message(folder, num);
+
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+static int mhdriver_move_message(mailsession * session,
+				 uint32_t num, char * mb)
+{
+  int r;
+  struct mailmh_folder * src_folder;
+  struct mailmh_folder * dest_folder;
+  struct mailmh * mh;
+  
+  mh = get_mh_session(session);
+  if (mh == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  src_folder = get_mh_cur_folder(session);
+  if (src_folder == NULL)
+    return MAIL_ERROR_BAD_STATE;
+
+  dest_folder = mailmh_folder_find(mh->mh_main, mb);
+  if (dest_folder == NULL)
+    return MAIL_ERROR_FOLDER_NOT_FOUND;
+
+  r = mailmh_folder_move_message(dest_folder, src_folder, num);
+
+  return mhdriver_mh_error_to_mail_error(r);
+}
+
+
+static int mhdriver_get_messages_list(mailsession * session,
+				      struct mailmessage_list ** result)
+{
+  struct mailmh_folder * folder;
+  int res;
+
+  folder = get_mh_cur_folder(session);
+  if (folder == NULL) {
+    res = MAIL_ERROR_BAD_STATE;
+    goto err;
+  }
+
+  mailmh_folder_update(folder);
+  return mh_get_messages_list(folder, session, mh_message_driver, result);
+
+ err:
+  return res;
+}
+
+static int mhdriver_get_message(mailsession * session,
+				uint32_t num, mailmessage ** result)
+{
+  mailmessage * msg_info;
+  int r;
+  
+  msg_info = mailmessage_new();
+  if (msg_info == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  r = mailmessage_init(msg_info, session, mh_message_driver, num, 0);
+  if (r != MAIL_NO_ERROR) {
+    mailmessage_free(msg_info);
+    return r;
+  }
+
+  * result = msg_info;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mhdriver_get_message_by_uid(mailsession * session,
+    const char * uid,
+    mailmessage ** result)
+{
+  uint32_t index;
+  char *p;
+  struct mailmh_msg_info * mh_msg_info;
+  struct mh_session_state_data * mh_data;
+  chashdatum key;
+  chashdatum data;
+  int r;
+  time_t mtime;
+  char * mtime_p;
+  
+  if (uid == NULL)
+    return MAIL_ERROR_INVAL;
+
+  index = strtoul(uid, &p, 10);
+  if (p == uid || * p != '-')
+    return MAIL_ERROR_INVAL;
+  
+  mh_data = session->sess_data;
+#if 0
+  mh_msg_info = cinthash_find(mh_data->mh_cur_folder->fl_msgs_hash, index);
+#endif
+  key.data = &index;
+  key.len = sizeof(index);
+  r = chash_get(mh_data->mh_cur_folder->fl_msgs_hash, &key, &data);
+  if (r < 0)
+    return MAIL_ERROR_MSG_NOT_FOUND;
+  
+  mh_msg_info = data.data;
+  
+  mtime_p = p + 1;
+  
+  mtime = strtoul(mtime_p, &p, 10);
+  if ((* p == '-') && (mtime == mh_msg_info->msg_mtime)) {
+    size_t size;
+    char *size_p;
+    
+    size_p = p + 1;
+    size = strtoul(size_p, &p, 10);
+    if ((* p == '\0') && (size == mh_msg_info->msg_size))
+      return mhdriver_get_message(session, index, result);
+  }
+  else if (* p != '-') {
+    return MAIL_ERROR_INVAL;
+  }
+  
+  return MAIL_ERROR_MSG_NOT_FOUND;
+}