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Add _notmuch_message_create_for_message_id

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This is the last piece needed for add_message to be able to properly
support a message with a duplicate message ID.  This function creates
a new notmuch_message_t object but one that may reference an existing
document in the database.
This commit is contained in:
Carl Worth 2009-10-23 05:53:52 -07:00
parent 69b25a75ec
commit 1b5d8984c6
2 changed files with 49 additions and 0 deletions
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44
message.cc
View file

@ -153,6 +153,50 @@ _notmuch_message_create (const void *talloc_owner,
return message;
}
/* Create a new notmuch_message_t object for a specific message ID,
* (which may or may not already exist in the databas).
*
* Here, 'talloc owner' is an optional talloc context to which the new
* message will belong. This allows for the caller to not bother
* calling notmuch_message_destroy on the message, and no that all
* memory will be reclaimed with 'talloc_owner' is free. The caller
* still can call notmuch_message_destroy when finished with the
* message if desired.
*
* The 'talloc_owner' argument can also be NULL, in which case the
* caller *is* responsible for calling notmuch_message_destroy.
*
* If there is already a document with message ID 'message_id' in the
* database, then the returned message can be used to query/modify the
* document. Otherwise, a new document will be inserted into the
* database before this function returns;
*/
notmuch_message_t *
_notmuch_message_create_for_message_id (const void *talloc_owner,
notmuch_database_t *notmuch,
const char *message_id)
{
notmuch_message_t *message;
Xapian::Document doc;
unsigned int doc_id;
char *term;
message = notmuch_database_find_message (notmuch, message_id);
if (message)
return talloc_steal (talloc_owner, message);
term = talloc_asprintf (NULL, "%s%s",
_find_prefix ("msgid"), message_id);
doc.add_term (term);
talloc_free (term);
doc.add_value (NOTMUCH_VALUE_MESSAGE_ID, message_id);
doc_id = notmuch->xapian_db->add_document (doc);
return _notmuch_message_create (talloc_owner, notmuch, doc_id);
}
const char *
notmuch_message_get_message_id (notmuch_message_t *message)
{

5
notmuch-private.h
View file

@ -102,6 +102,11 @@ _notmuch_message_create (const void *talloc_owner,
notmuch_database_t *notmuch,
unsigned int doc_id);
notmuch_message_t *
_notmuch_message_create_for_message_id (const void *talloc_owner,
notmuch_database_t *notmuch,
const char *message_id);
/* XXX: Here temporarily during code movement only. */
/* "128 bits of thread-id ought to be enough for anybody" */
#define NOTMUCH_THREAD_ID_BITS 128