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+/*
+ * 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 <libetpan/mailmessage_types.h>
+
+#ifndef MAILMESSAGE_H
+
+#define MAILMESSAGE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+  mailmessage_new
+
+  This function will initializes a new empty message.
+  
+  @return a new empty message will be returned.
+*/
+
+mailmessage * mailmessage_new(void);
+
+/*
+  mailmessage_free
+
+  This function will release the memory used by this message.
+*/
+
+void mailmessage_free(mailmessage * info);
+
+/*
+  mailmessage_init
+  
+  This function will initializes a mailmessage structure
+  with a message from a given session.
+
+  @param msg_info  This is the message to initialize.
+  
+  @param session This is the source session of the message. It
+    can be NULL if the message does not get the information
+    through the session.
+  
+  @param driver This is the driver to use for the message.
+
+  @param index This is the message number in the session. 0 can
+    be given if the message is not attached to a session.
+
+  @param size is an optional parameter, 0 can be given.
+    This is informational. This is the size of message content.
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error
+*/
+
+int mailmessage_init(mailmessage * msg_info,
+		     mailsession * session,
+		     mailmessage_driver * driver,
+		     uint32_t index, size_t size);
+
+/*
+  mailmessage_flush
+
+  This function will release all the temporary resources that are not
+  necessary to use the mailmessage structure from memory. These
+  resources are for example cached information, such as the MIME
+  structure.
+
+  @param info is the message to clean.
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error. We can assume that MAIL_NO_ERROR is always returned.
+*/
+
+int mailmessage_flush(mailmessage * info);
+
+/*
+  mailmessage_check
+
+  This function will notify the new value of the flags to the session,
+  it must be called before mailsession_check_folder() in case the flags have
+  been changed.
+
+  @param info is the message to checkpoint.
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error. We can assume that MAIL_NO_ERROR is always returned.
+*/
+
+int mailmessage_check(mailmessage * info);
+
+/*
+  mailmessage_fetch_result_free
+
+  This function releases the memory used by a message returned
+  by any of the fetch function that returns a (char *).
+
+  @param msg_info is the message which the given buffer is from.
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+  on error. We can assume that MAIL_NO_ERROR is always returned.
+*/
+
+int mailmessage_fetch_result_free(mailmessage * msg_info,
+				  char * msg);
+
+/*
+  mailmessage_fetch
+
+  This function returns the content of the message (headers and text).
+
+  @param msg_info  is the message from which we want to fetch information.
+
+  @param result     The content of the message is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch(mailmessage * msg_info,
+		      char ** result,
+		      size_t * result_len);
+
+/*
+  mailmessage_fetch_header
+
+  This function returns the header of the message as a string.
+
+  @param msg_info  is the message from which we want to fetch information.
+
+  @param result     The header of the message is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch_header(mailmessage * msg_info,
+			     char ** result,
+			     size_t * result_len);
+
+/*
+  mailmessage_fetch_body
+
+  This function returns the content of the message (without headers).
+
+  @param msg_info  is the message from which we want to fetch information.
+  @param result     The message text (without headers) is returned
+    in (* result)
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch_body(mailmessage * msg_info,
+			   char ** result, size_t * result_len);
+
+/*
+  mailmessage_fetch_size
+
+  This function returns the size of the message content.
+
+  @param msg_info  is the message from which we want to fetch information.
+
+  @param result The length of the message content is stored in (* result).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch_size(mailmessage * msg_info,
+			   size_t * result);
+
+/*
+  mailmessage_get_bodystructure
+
+  This functions returns the MIME structure of the message.
+  The returned information MUST not be freed by hand. It is freed by
+  mailmessage_flush() or mailmessage_free().
+
+  @param msg_info  is the message from which we want to fetch information.
+
+  @param result The MIME structure is stored in (* result).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_get_bodystructure(mailmessage * msg_info,
+				  struct mailmime ** result);
+
+/*
+  mailmessage_fetch_section
+
+  This function returns the content of a MIME part.
+
+  @param msg_info  is the message from which we want to fetch information.
+  
+  @param mime is the MIME part identifier.
+
+  @param result     The content is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+ */
+
+int mailmessage_fetch_section(mailmessage * msg_info,
+			      struct mailmime * mime,
+			      char ** result, size_t * result_len);
+
+/*
+  mailmessage_fetch_section_header
+
+  This function returns the header of the message contained
+  in the given MIME part.
+
+  @param msg_info  is the message from which we want to fetch information.
+  
+  @param mime is the MIME part identifier.
+
+  @param result     The header is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch_section_header(mailmessage * msg_info,
+				     struct mailmime * mime,
+				     char ** result,
+				     size_t * result_len);
+
+/*
+  mailmessage_fetch_section_mime
+
+  This function returns the MIME header of the given MIME part.
+
+  @param msg_info  is the message from which we want to fetch information.
+  
+  @param mime is the MIME part identifier.
+
+  @param result     The MIME header is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_fetch_section_mime(mailmessage * msg_info,
+				   struct mailmime * mime,
+				   char ** result,
+				   size_t * result_len);
+
+/*
+  mailmessage_fetch_section_body
+
+  This function returns the text part of the message contained
+  in the given MIME part.
+
+  @param msg_info  is the message from which we want to fetch information.
+  
+  @param mime is the MIME part identifier.
+
+  @param result     The message text is returned in (* result)
+
+  @param result_len The length of the returned string is stored
+    in (* result_len).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+ */
+
+int mailmessage_fetch_section_body(mailmessage * msg_info,
+				   struct mailmime * mime,
+				   char ** result,
+				   size_t * result_len);
+
+/*
+  mailmessage_fetch_envelope
+
+  This function returns a list of parsed fields of the message,
+  chosen by the driver.
+  The returned structure must be freed with mailimf_fields_free().
+
+  @param msg_info  is the message from which we want to fetch information.
+  
+  @param result     The headers list is returned in (* result)
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+ */
+
+int mailmessage_fetch_envelope(mailmessage * msg_info,
+			       struct mailimf_fields ** result);
+
+
+/*
+  mailmessage_get_flags
+
+  This function returns the flags related to the message.
+  The returned information MUST not be freed by hand. It is freed by
+  mailmessage_free().
+
+  @param msg_info  is the message from which we want to fetch information.
+
+  @param result The flags are stored in (* result).
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+int mailmessage_get_flags(mailmessage * msg_info,
+			  struct mail_flags ** result);
+
+/*
+  mailmessage_resolve_single_fields
+
+  This function will use the fields information to fill the single_fields
+  structure in the mailmessage structure.
+
+  @param msg_info This is the msg_info to process.
+
+  @return MAIL_NO_ERROR is returned on success, MAIL_ERROR_XXX is returned
+    on error.
+*/
+
+void mailmessage_resolve_single_fields(mailmessage * msg_info);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif