From 9e549686b23b6dffdcbd09c9b10dc2cb795fbcdf Mon Sep 17 00:00:00 2001
From: zautrix <zautrix>
Date: Fri, 18 Mar 2005 20:17:03 +0000
Subject: Initial revision

---
(limited to 'libetpan/src/driver/implementation/mh/mhdriver_cached_message.c')

diff --git a/libetpan/src/driver/implementation/mh/mhdriver_cached_message.c b/libetpan/src/driver/implementation/mh/mhdriver_cached_message.c
new file mode 100644
index 0000000..a59beea
--- a/dev/null
+++ b/libetpan/src/driver/implementation/mh/mhdriver_cached_message.c
@@ -0,0 +1,338 @@
+/*
+ * 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 "mhdriver_message.h"
+
+#include "mailmessage_tools.h"
+#include "mhdriver_tools.h"
+#include "mhdriver_cached.h"
+#include "mailmh.h"
+#include "generic_cache.h"
+
+#include "mail_cache_db.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 mh_prefetch(mailmessage * msg_info);
+
+static void mh_prefetch_free(struct generic_message_t * msg);
+
+static int mh_initialize(mailmessage * msg_info);
+
+static int mh_fetch_size(mailmessage * msg_info,
+			 size_t * result);
+
+static int mh_get_flags(mailmessage * msg_info,
+			struct mail_flags ** result);
+
+static void mh_uninitialize(mailmessage * msg_info);
+
+static void mh_flush(mailmessage * msg_info);
+
+static void mh_check(mailmessage * msg_info);
+
+static int mh_fetch_header(mailmessage * msg_info,
+			   char ** result,
+			   size_t * result_len);
+
+static mailmessage_driver local_mh_cached_message_driver = {
+  .msg_name = "mh-cached",
+
+  .msg_initialize = mh_initialize,
+  .msg_uninitialize = mh_uninitialize,
+
+  .msg_flush = mh_flush,
+  .msg_check = mh_check,
+
+  .msg_fetch_result_free = mailmessage_generic_fetch_result_free,
+
+  .msg_fetch = mailmessage_generic_fetch,
+  .msg_fetch_header = mh_fetch_header,
+  .msg_fetch_body = mailmessage_generic_fetch_body,
+  .msg_fetch_size = mh_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 = mh_get_flags,
+};
+
+mailmessage_driver * mh_cached_message_driver =
+&local_mh_cached_message_driver;
+
+static inline struct mh_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)->mh_ancestor;
+}
+
+static inline struct mh_session_state_data *
+get_ancestor_session_data(mailmessage * msg)
+{
+  return get_ancestor_session(msg)->sess_data;
+}
+
+static inline struct mailmh *
+get_mh_session(mailmessage * msg)
+{
+  return get_ancestor_session_data(msg)->mh_session;
+}
+
+static inline struct mailmh_folder *
+get_mh_cur_folder(mailmessage * msg)
+{
+  return get_ancestor_session_data(msg)->mh_cur_folder;
+}
+
+static int mh_prefetch(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * msg_content;
+  size_t msg_length;
+
+  r = mhdriver_fetch_message(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 mh_prefetch_free(struct generic_message_t * msg)
+{
+  if (msg->msg_message != NULL) {
+    mmap_string_unref(msg->msg_message);
+    msg->msg_message = NULL;
+  }
+}
+
+static int mh_initialize(mailmessage * msg_info)
+{
+  struct generic_message_t * msg;
+  int r;
+  char * uid;
+  char static_uid[PATH_MAX];
+  struct mailmh_msg_info * mh_msg_info;
+  chashdatum key;
+  chashdatum data;
+  struct mailmh_folder * folder;
+
+  folder = get_mh_cur_folder(msg_info);
+  
+  key.data = &msg_info->msg_index;
+  key.len = sizeof(msg_info->msg_index);
+  r = chash_get(folder->fl_msgs_hash, &key, &data);
+  if (r < 0)
+    return MAIL_ERROR_INVAL;
+  
+  mh_msg_info = data.data;
+
+  snprintf(static_uid, PATH_MAX, "%u-%lu-%lu", msg_info->msg_index,
+	   mh_msg_info->msg_mtime, (unsigned long) mh_msg_info->msg_size);
+  uid = strdup(static_uid);
+  if (uid == NULL)
+    return MAIL_ERROR_MEMORY;
+
+  r = mailmessage_generic_initialize(msg_info);
+  if (r != MAIL_NO_ERROR) {
+    free(uid);
+    return r;
+  }
+
+  msg = msg_info->msg_data;
+  msg->msg_prefetch = mh_prefetch;
+  msg->msg_prefetch_free = mh_prefetch_free;
+  msg_info->msg_uid = uid;
+
+  return MAIL_NO_ERROR;
+}
+
+static void mh_uninitialize(mailmessage * msg_info)
+{
+  mailmessage_generic_uninitialize(msg_info);
+}
+
+
+#define FLAGS_NAME "flags.db"
+
+static void mh_flush(mailmessage * msg_info)
+{
+  mailmessage_generic_flush(msg_info);
+}
+
+static void mh_check(mailmessage * msg_info)
+{
+  int r;
+
+  if (msg_info->msg_flags != NULL) {
+    r = mail_flags_store_set(get_cached_session_data(msg_info)->mh_flags_store,
+        msg_info);
+    /* ignore errors */
+  }
+}
+     
+static int mh_fetch_size(mailmessage * msg_info,
+			 size_t * result)
+{
+  int r;
+  size_t size;
+
+  r = mhdriver_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 mh_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 mh_cached_session_state_data * cached_data;
+  MMAPString * mmapstr;
+
+  if (msg_info->msg_flags != NULL) {
+    * result = msg_info->msg_flags;
+    
+    return MAIL_NO_ERROR;
+  }
+
+  cached_data = get_cached_session_data(msg_info);
+  
+  flags = mail_flags_store_get(cached_data->mh_flags_store,
+      msg_info->msg_index);
+
+  if (flags == NULL) {
+    if (cached_data->mh_quoted_mb == NULL) {
+      res = MAIL_ERROR_BAD_STATE;
+      goto err;
+    }
+    
+    snprintf(filename_flags, PATH_MAX, "%s/%s/%s",
+        cached_data->mh_flags_directory,
+        cached_data->mh_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;
+    }
+    
+    r = mhdriver_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 mh_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 = mhdriver_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;
+  }
+}
--
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