1 files changed, 361 insertions, 0 deletions

diff --git a/libetpan/src/driver/implementation/mbox/mboxdriver_cached_message.c b/libetpan/src/driver/implementation/mbox/mboxdriver_cached_message.c
new file mode 100644
index 0000000..9f77d32
--- a/dev/null
+++ b/libetpan/src/driver/implementation/mbox/mboxdriver_cached_message.c
@@ -0,0 +1,361 @@
+/*
+ * libEtPan! -- a mail stuff library
+ *
+ * Copyright (C) 2001, 2005 - 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 AUTHORS 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 AUTHORS 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 "mboxdriver_cached_message.h"
+
+#include "mailmessage_tools.h"
+#include "mboxdriver_tools.h"
+#include "mboxdriver_cached.h"
+#include "mboxdriver.h"
+#include "mailmbox.h"
+#include "mail_cache_db.h"
+#include "generic_cache.h"
+
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+
+static int mbox_prefetch(mailmessage * msg_info);
+
+static void mbox_prefetch_free(struct generic_message_t * msg);
+
+static int mbox_initialize(mailmessage * msg_info);
+
+static void mbox_uninitialize(mailmessage * msg_info);
+
+static void mbox_flush(mailmessage * msg_info);
+
+static void mbox_check(mailmessage * msg_info);
+
+static int mbox_fetch_size(mailmessage * msg_info,
+                           size_t * result);
+
+static int mbox_get_flags(mailmessage * msg_info,
+                          struct mail_flags ** result);
+
+static int mbox_fetch_header(mailmessage * msg_info,
+                           char ** result,
+                             size_t * result_len);
+
+static mailmessage_driver local_mbox_cached_message_driver = {
+  .msg_name = "mbox-cached",
+
+  .msg_initialize = mbox_initialize,
+  .msg_uninitialize = mbox_uninitialize,
+
+  .msg_flush = mbox_flush,
+  .msg_check = mbox_check,
+
+  .msg_fetch_result_free = mailmessage_generic_fetch_result_free,
+
+  .msg_fetch = mailmessage_generic_fetch,
+  .msg_fetch_header = mbox_fetch_header,
+  .msg_fetch_body = mailmessage_generic_fetch_body,
+  .msg_fetch_size = mbox_fetch_size,
+  .msg_get_bodystructure = mailmessage_generic_get_bodystructure,
+  .msg_fetch_section = mailmessage_generic_fetch_section,
+  .msg_fetch_section_header = mailmessage_generic_fetch_section_header,
+  .msg_fetch_section_mime = mailmessage_generic_fetch_section_mime,
+  .msg_fetch_section_body = mailmessage_generic_fetch_section_body,
+  .msg_fetch_envelope = mailmessage_generic_fetch_envelope,
+
+  .msg_get_flags = mbox_get_flags,
+};
+
+mailmessage_driver * mbox_cached_message_driver =
+&local_mbox_cached_message_driver;
+
+static inline struct mbox_cached_session_state_data *
+get_cached_session_data(mailmessage * msg)
+{
+  return msg->msg_session->sess_data;
+}
+
+static inline mailsession * get_ancestor_session(mailmessage * msg)
+{
+  return get_cached_session_data(msg)->mbox_ancestor;
+}
+
+static inline struct mbox_session_state_data *
+get_ancestor_session_data(mailmessage * msg)
+{
+  return get_ancestor_session(msg)->sess_data;
+}
+
+static inline struct mailmbox_folder *
+get_mbox_session(mailmessage * msg)
+{
+  return get_ancestor_session_data(msg)->mbox_folder;
+}
+
+static int mbox_prefetch(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * msg_content;
+  size_t msg_length;
+
+  r = mboxdriver_fetch_msg(get_ancestor_session(msg_info),
+      msg_info->msg_index,
+      &msg_content, &msg_length);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  msg = msg_info->msg_data;
+
+  msg->msg_message = msg_content;
+  msg->msg_length = msg_length;
+
+  return MAIL_NO_ERROR;
+}
+
+static void mbox_prefetch_free(struct generic_message_t * msg)
+{
+  if (msg->msg_message != NULL) {
+    mmap_string_unref(msg->msg_message);
+    msg->msg_message = NULL;
+  }
+}
+
+static int mbox_initialize(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * uid;
+  char static_uid[PATH_MAX];
+  struct mailmbox_msg_info * info;
+  struct mailmbox_folder * folder;
+  int res;
+  chashdatum key;
+  chashdatum data;
+
+  folder = get_mbox_session(msg_info);
+  if (folder == NULL) {
+    res = MAIL_ERROR_BAD_STATE;
+    goto err;
+  }
+    
+  key.data = (char *) &msg_info->msg_index;
+  key.len = sizeof(msg_info->msg_index);
+  
+  r = chash_get(folder->mb_hash, &key, &data);
+  if (r < 0) {
+    res = MAIL_ERROR_MSG_NOT_FOUND;
+    goto err;
+  }
+  
+  info = (struct mailmbox_msg_info *) data.data;
+  
+  snprintf(static_uid, PATH_MAX, "%u-%lu",
+      msg_info->msg_index, (unsigned long) info->msg_body_len);
+  uid = strdup(static_uid);
+  if (uid == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+  
+  r = mailmessage_generic_initialize(msg_info);
+  if (r != MAIL_NO_ERROR) {
+    free(uid);
+    res = r;
+    goto err;
+  }
+
+  msg = msg_info->msg_data;
+
+  msg->msg_prefetch = mbox_prefetch;
+  msg->msg_prefetch_free = mbox_prefetch_free;
+  msg_info->msg_uid = uid;
+
+  return MAIL_NO_ERROR;
+
+ err:
+  return res;
+}
+
+static void mbox_uninitialize(mailmessage * msg_info)
+{
+  mailmessage_generic_uninitialize(msg_info);
+}
+
+#define FLAGS_NAME "flags.db"
+
+static void mbox_flush(mailmessage * msg_info)
+{
+  mailmessage_generic_flush(msg_info);
+}
+
+static void mbox_check(mailmessage * msg_info)
+{
+  int r;
+
+  if (msg_info->msg_flags != NULL) {
+    r = mail_flags_store_set(get_cached_session_data(msg_info)->mbox_flags_store,
+        msg_info);
+    /* ignore errors */
+  }
+}
+
+     
+static int mbox_fetch_size(mailmessage * msg_info,
+                           size_t * result)
+{
+  int r;
+  size_t size;
+
+  r = mboxdriver_fetch_size(get_ancestor_session(msg_info),
+                            msg_info->msg_index, &size);
+  if (r != MAIL_NO_ERROR)
+    return r;
+  
+  * result = size;
+
+  return MAIL_NO_ERROR;
+}
+
+static int mbox_get_flags(mailmessage * msg_info,
+                          struct mail_flags ** result)
+{
+  int r;
+  struct mail_flags * flags;
+  struct mail_cache_db * cache_db_flags;
+  char filename_flags[PATH_MAX];
+  int res;
+  struct mbox_cached_session_state_data * cached_data;
+  MMAPString * mmapstr;
+  struct mailmbox_folder * folder;
+
+  if (msg_info->msg_flags != NULL) {
+    * result = msg_info->msg_flags;
+    
+    return MAIL_NO_ERROR;
+  }
+
+  flags = mail_flags_store_get(get_cached_session_data(msg_info)->mbox_flags_store,
+      msg_info->msg_index);
+
+  if (flags == NULL) {
+    folder = get_mbox_session(msg_info);
+    if (folder == NULL) {
+      res = MAIL_ERROR_BAD_STATE;
+      goto err;
+    }
+    
+    cached_data = get_cached_session_data(msg_info);
+    if (cached_data->mbox_quoted_mb == NULL) {
+      res = MAIL_ERROR_BAD_STATE;
+      goto err;
+    }
+    
+    snprintf(filename_flags, PATH_MAX, "%s/%s/%s",
+        cached_data->mbox_flags_directory,
+        cached_data->mbox_quoted_mb, FLAGS_NAME);
+    
+    r = mail_cache_db_open_lock(filename_flags, &cache_db_flags);
+    if (r < 0) {
+      res = MAIL_ERROR_MEMORY;
+      goto err;
+    }
+    
+    mmapstr = mmap_string_new("");
+    if (mmapstr == NULL) {
+      res = MAIL_ERROR_MEMORY;
+      goto close_db_flags;
+    }
+    
+    if (msg_info->msg_index > folder->mb_written_uid) {
+      flags = mail_flags_new_empty();
+    }
+    else {
+      r = mboxdriver_get_cached_flags(cache_db_flags, mmapstr,
+          msg_info->msg_session,
+          msg_info->msg_index, &flags);
+      if (r != MAIL_NO_ERROR) {
+        flags = mail_flags_new_empty();
+        if (flags == NULL) {
+          res = MAIL_ERROR_MEMORY;
+          goto free_mmapstr;
+        }
+      }
+    }
+
+    mmap_string_free(mmapstr);
+    mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+  }
+  
+  msg_info->msg_flags = flags;
+
+  * result = flags;
+
+  return MAIL_NO_ERROR;
+
+ free_mmapstr:
+  mmap_string_free(mmapstr);
+ close_db_flags:
+  mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+ err:
+  return res;
+}
+
+static int mbox_fetch_header(mailmessage * msg_info,
+                           char ** result,
+                           size_t * result_len)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * msg_content;
+  size_t msg_length;
+
+  msg = msg_info->msg_data;
+  if (msg->msg_message != NULL) {
+    return mailmessage_generic_fetch_header(msg_info, result, result_len);
+  }
+  else {
+    r = mboxdriver_fetch_header(get_ancestor_session(msg_info),
+                                msg_info->msg_index,
+                                &msg_content, &msg_length);
+    if (r != MAIL_NO_ERROR)
+      return r;
+    
+    * result = msg_content;
+    * result_len = msg_length;
+    
+    return MAIL_NO_ERROR;
+  }
+}