1 files changed, 334 insertions, 0 deletions

diff --git a/libetpan/src/driver/implementation/maildir/maildirdriver_cached_message.c b/libetpan/src/driver/implementation/maildir/maildirdriver_cached_message.c
new file mode 100644
index 0000000..d2c30cc
--- a/dev/null
+++ b/libetpan/src/driver/implementation/maildir/maildirdriver_cached_message.c
@@ -0,0 +1,334 @@
+/*
+ * 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 "maildirdriver_message.h"
+
+#include "mailmessage_tools.h"
+#include "maildirdriver.h"
+#include "maildir.h"
+#include "generic_cache.h"
+#include "mail_cache_db.h"
+#include "maildirdriver_tools.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 get_flags(mailmessage * msg_info,
+    struct mail_flags ** result);
+
+static int prefetch(mailmessage * msg_info);
+
+static void prefetch_free(struct generic_message_t * msg);
+
+static int initialize(mailmessage * msg_info);
+
+static void check(mailmessage * msg_info);
+
+static mailmessage_driver local_maildir_cached_message_driver = {
+  .msg_name = "maildir-cached",
+
+  .msg_initialize = initialize,
+  .msg_uninitialize = mailmessage_generic_uninitialize,
+
+  .msg_flush = mailmessage_generic_flush,
+  .msg_check = check,
+
+  .msg_fetch_result_free = mailmessage_generic_fetch_result_free,
+
+  .msg_fetch = mailmessage_generic_fetch,
+  .msg_fetch_header = mailmessage_generic_fetch_header,
+  .msg_fetch_body = mailmessage_generic_fetch_header,
+  .msg_fetch_size = NULL,
+  .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 = get_flags,
+};
+
+mailmessage_driver * maildir_cached_message_driver =
+&local_maildir_cached_message_driver;
+
+struct maildir_msg_data {
+  int fd;
+};
+
+#if 0
+static inline struct maildir_cached_session_state_data *
+get_cached_session_data(mailmessage * msg)
+{
+  return msg->session->data;
+}
+
+static inline mailsession * cached_session_get_ancestor(mailsession * session)
+{
+  return get_data(session)->session;
+}
+
+static inline struct maildir_session_state_data *
+cached_session_get_ancestor_data(mailsession * session)
+{
+  return get_ancestor(session)->data;
+}
+
+static struct maildir * get_maildir_session(mailmessage * msg)
+{
+  return cached_session_get_ancestor_data(msg->session)->session;
+}
+#endif
+static inline struct maildir_cached_session_state_data *
+get_cached_session_data(mailmessage * msg)
+{
+  return msg->msg_session->sess_data;
+}
+
+static inline struct maildir_cached_session_state_data *
+cached_session_get_data(mailsession * s)
+{
+  return s->sess_data;
+}
+
+static inline mailsession * cached_session_get_ancestor(mailsession * s)
+{
+  return cached_session_get_data(s)->md_ancestor;
+}
+
+static inline struct maildir_session_state_data *
+cached_session_get_ancestor_data(mailsession * s)
+{
+  return cached_session_get_ancestor(s)->sess_data;
+}
+
+static inline struct maildir_session_state_data *
+get_session_ancestor_data(mailmessage * msg)
+{
+  return cached_session_get_ancestor_data(msg->msg_session);
+}
+
+static inline struct maildir *
+cached_session_get_maildir_session(mailsession * session)
+{
+  return cached_session_get_ancestor_data(session)->md_session;
+}
+
+static inline struct maildir * get_maildir_session(mailmessage * msg)
+{
+  return cached_session_get_maildir_session(msg->msg_session);
+}
+
+static int prefetch(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int res;
+  struct maildir_msg_data * data;
+  char * filename;
+  int fd;
+  char * mapping;
+  struct maildir * md;
+  
+  md = get_maildir_session(msg_info);
+  
+  filename = maildir_message_get(md, msg_info->msg_uid);
+  if (filename == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto err;
+  }
+  
+  fd = open(filename, O_RDONLY);
+  free(filename);
+  if (fd == -1) {
+    res = MAIL_ERROR_FILE;
+    goto err;
+  }
+  
+  mapping = mmap(NULL, msg_info->msg_size, PROT_READ, MAP_PRIVATE, fd, 0);
+  if (mapping == MAP_FAILED) {
+    res = MAIL_ERROR_FILE;
+    goto close;
+  }
+  
+  data = malloc(sizeof(* data));
+  if (data == NULL) {
+    res = MAIL_ERROR_MEMORY;
+    goto unmap;
+  }
+  
+  data->fd = fd;
+  
+  msg = msg_info->msg_data;
+  
+  msg->msg_data = data;
+  msg->msg_message = mapping;
+  msg->msg_length = msg_info->msg_size;
+  
+  return MAIL_NO_ERROR;
+  
+ unmap:
+  munmap(mapping, msg_info->msg_size);
+ close:
+  close(fd);
+ err:
+  return res;
+}
+
+static void prefetch_free(struct generic_message_t * msg)
+{
+  if (msg->msg_message != NULL) {
+    struct maildir_msg_data * data;
+    
+    munmap(msg->msg_message, msg->msg_length);
+    msg->msg_message = NULL;
+    data = msg->msg_data;
+    close(data->fd);
+    free(data);
+  }
+}
+
+static int initialize(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  
+  r = mailmessage_generic_initialize(msg_info);
+  if (r != MAIL_NO_ERROR)
+    return r;
+
+  msg = msg_info->msg_data;
+  msg->msg_prefetch = prefetch;
+  msg->msg_prefetch_free = prefetch_free;
+
+  return MAIL_NO_ERROR;
+}
+
+static void check(mailmessage * msg_info)
+{
+  int r;
+
+  if (msg_info->msg_flags != NULL) {
+    r = mail_flags_store_set(get_session_ancestor_data(msg_info)->md_flags_store, msg_info);
+    
+    r = mail_flags_store_set(get_cached_session_data(msg_info)->md_flags_store, msg_info);
+    /* ignore errors */
+  }
+}
+
+#define FLAGS_NAME "flags.db"
+
+static int get_flags(mailmessage * msg_info,
+    struct mail_flags ** result)
+{
+  struct mail_cache_db * cache_db_flags;
+  chashdatum key;
+  chashdatum value;
+  struct maildir * md;
+  struct mail_flags * flags;
+  struct maildir_cached_session_state_data * data;
+  struct maildir_msg * md_msg;
+  int r;
+  uint32_t driver_flags;
+  char filename_flags[PATH_MAX];
+  char keyname[PATH_MAX];
+  MMAPString * mmapstr;
+  
+  if (msg_info->msg_flags != NULL) {
+    * result = msg_info->msg_flags;
+    return MAIL_NO_ERROR;
+  }
+  
+  data = get_cached_session_data(msg_info);
+  flags = mail_flags_store_get(data->md_flags_store,
+      msg_info->msg_index);
+  if (flags != NULL) {
+    msg_info->msg_flags = flags;
+    * result = msg_info->msg_flags;
+    return MAIL_NO_ERROR;
+  }
+  
+  snprintf(filename_flags, PATH_MAX, "%s%c%s%c%s",
+      data->md_flags_directory, MAIL_DIR_SEPARATOR, data->md_quoted_mb,
+      MAIL_DIR_SEPARATOR, FLAGS_NAME);
+  
+  r = mail_cache_db_open_lock(filename_flags, &cache_db_flags);
+  if (r < 0)
+    return MAIL_ERROR_FILE;
+  
+  snprintf(keyname, PATH_MAX, "%s-flags", msg_info->msg_uid);
+  
+  mmapstr = mmap_string_new("");
+  if (mmapstr == NULL) {
+    mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+    return MAIL_ERROR_MEMORY;
+  }
+  
+  r = generic_cache_flags_read(cache_db_flags, mmapstr, keyname, &flags);
+  mmap_string_free(mmapstr);
+  
+  mail_cache_db_close_unlock(filename_flags, cache_db_flags);
+  
+  if (r != MAIL_NO_ERROR) {
+    flags = mail_flags_new_empty();
+    if (flags == NULL)
+      return MAIL_ERROR_MEMORY;
+  }
+  
+  md = get_maildir_session(msg_info);
+  if (md == NULL)
+    return MAIL_ERROR_BAD_STATE;
+  
+  key.data = msg_info->msg_uid;
+  key.len = strlen(msg_info->msg_uid);
+  r = chash_get(md->mdir_msg_hash, &key, &value);
+  if (r < 0)
+    return MAIL_ERROR_MSG_NOT_FOUND;
+  
+  md_msg = value.data;
+  
+  driver_flags = maildirdriver_maildir_flags_to_flags(md_msg->msg_flags);
+  
+  flags->fl_flags = driver_flags;
+  msg_info->msg_flags = flags;
+  
+  * result = msg_info->msg_flags;
+  
+  return MAIL_NO_ERROR;
+}