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database: Split _find_parent_id into _split_path and _find_directory_id

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Some pending commits want the _split_path functionality separate from
mapping a directory to a document ID. The split_path function now
returns the basename as well as the directory name.
This commit is contained in:
Carl Worth 2009-12-21 08:14:52 -08:00
parent 4c1cca888f
commit 84742d86ab
2 changed files with 88 additions and 56 deletions
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132
lib/database.cc
View file

@ -597,40 +597,40 @@ directory_db_path (const char *path)
return path;
}
/* Given a 'path' (relative to the database path) return the document
* ID of the directory document corresponding to the parent directory
* of 'path' in 'parent_id'.
/* Given a path, split it into two parts: the directory part is all
* components except for the last, and the basename is that last
* component. Getting the return-value for either part is optional
* (the caller can pass NULL).
*
* The original 'path' can represent either a regular file or a
* directory, (in either case, the document ID of the parent will be
* returned). Trailing slashes on 'path' will be ignored, and any
* directory---the splitting will be carried out in the same way in
* either case. Trailing slashes on 'path' will be ignored, and any
* cases of multiple '/' characters appearing in series will be
* treated as a single '/'.
*
* If no directory document exists in the database for the parent, (or
* for any of its parents up to the top-level database path), then
* directory documents will be created for these (each with an mtime
* of 0).
* Allocation (if any) will have 'ctx' as the talloc owner. But
* pointers will be returned within the original path string whenever
* possible.
*
* Return value:
*
* NOTMUCH_STATUS_SUCCESS: Valid value available in parent_id.
*
* NOTMUCH_STATUS_XAPIAN_EXCEPTION: A Xapian exception
* occurred and parent_id will be set to (unsigned) -1.
* Note: If 'path' is non-empty and contains no non-trailing slash,
* (that is, consists of a filename with no parent directory), then
* the directory returned will be an empty string. However, if 'path'
* is an empty string, then both directory and basename will be
* returned as NULL.
*/
notmuch_status_t
_notmuch_database_find_parent_id (notmuch_database_t *notmuch,
const char *path,
unsigned int *parent_id)
_notmuch_database_split_path (void *ctx,
const char *path,
const char **directory,
const char **basename)
{
const char *slash, *parent_db_path;
char *parent_path;
notmuch_private_status_t private_status;
notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
const char *slash;
if (path == NULL || *path == '\0') {
*parent_id = 0;
if (directory)
*directory = NULL;
if (basename)
*basename = NULL;
return NOTMUCH_STATUS_SUCCESS;
}
@ -651,6 +651,9 @@ _notmuch_database_find_parent_id (notmuch_database_t *notmuch,
if (*slash == '/')
break;
if (basename)
*basename = slash;
--slash;
}
@ -662,32 +665,54 @@ _notmuch_database_find_parent_id (notmuch_database_t *notmuch,
--slash;
}
if (slash == path)
parent_path = talloc_strdup (notmuch, "");
else
parent_path = talloc_strndup (notmuch, path, slash - path + 1);
parent_db_path = directory_db_path (parent_path);
private_status = find_unique_doc_id (notmuch, "directory",
parent_db_path, parent_id);
if (private_status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
status = notmuch_database_set_directory_mtime (notmuch,
parent_path, 0);
if (status)
return status;
private_status = find_unique_doc_id (notmuch, "directory",
parent_db_path, parent_id);
status = COERCE_STATUS (private_status, "_find_parent_id");
if (slash == path) {
if (directory)
*directory = talloc_strdup (ctx, "");
if (basename)
*basename = path;
} else {
if (directory)
*directory = talloc_strndup (ctx, path, slash - path + 1);
}
if (parent_db_path != parent_path)
free ((char *) parent_db_path);
return NOTMUCH_STATUS_SUCCESS;
}
talloc_free (parent_path);
notmuch_status_t
_notmuch_database_find_directory_id (notmuch_database_t *notmuch,
const char *path,
unsigned int *directory_id)
{
notmuch_private_status_t private_status;
notmuch_status_t status = NOTMUCH_STATUS_SUCCESS;
const char *db_path;
if (path == NULL) {
*directory_id = 0;
return NOTMUCH_STATUS_SUCCESS;
}
db_path = directory_db_path (path);
private_status = find_unique_doc_id (notmuch, "directory",
db_path, directory_id);
if (private_status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
status = notmuch_database_set_directory_mtime (notmuch,
path, 0);
if (status)
goto DONE;
private_status = find_unique_doc_id (notmuch, "directory",
db_path, directory_id);
status = COERCE_STATUS (private_status, "_find_directory_id");
}
DONE:
if (db_path != path)
free ((char *) db_path);
if (status)
*parent_id = -1;
*directory_id = -1;
return status;
}
@ -736,8 +761,9 @@ notmuch_database_set_directory_mtime (notmuch_database_t *notmuch,
unsigned int doc_id;
notmuch_private_status_t status;
notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
const char *db_path = NULL;
const char *parent, *db_path = NULL;
unsigned int parent_id;
void *local = talloc_new (notmuch);
if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_ONLY) {
fprintf (stderr, "Attempted to update a read-only database.\n");
@ -756,23 +782,20 @@ notmuch_database_set_directory_mtime (notmuch_database_t *notmuch,
Xapian::sortable_serialise (mtime));
if (status == NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND) {
char *term = talloc_asprintf (NULL, "%s%s",
char *term = talloc_asprintf (local, "%s%s",
_find_prefix ("directory"), db_path);
doc.add_term (term);
talloc_free (term);
doc.set_data (path);
ret = _notmuch_database_find_parent_id (notmuch, path,
&parent_id);
if (ret)
return ret;
_notmuch_database_split_path (local, path, &parent, NULL);
term = talloc_asprintf (NULL, "%s%u",
_notmuch_database_find_directory_id (notmuch, parent, &parent_id);
term = talloc_asprintf (local, "%s%u",
_find_prefix ("parent"),
parent_id);
doc.add_term (term);
talloc_free (term);
db->add_document (doc);
} else {
@ -801,6 +824,7 @@ notmuch_database_get_directory_mtime (notmuch_database_t *notmuch,
notmuch_private_status_t status;
const char *db_path = NULL;
time_t ret = 0;
void *local = talloc_new (notmuch);
db_path = directory_db_path (path);
@ -820,6 +844,8 @@ notmuch_database_get_directory_mtime (notmuch_database_t *notmuch,
if (db_path != path)
free ((char *) db_path);
talloc_free (local);
return ret;
}

12
lib/notmuch-private.h
View file

@ -156,9 +156,15 @@ _notmuch_database_relative_path (notmuch_database_t *notmuch,
const char *path);
notmuch_status_t
_notmuch_database_find_parent_id (notmuch_database_t *notmuch,
const char *path,
unsigned int *parent_id);
_notmuch_database_split_path (void *ctx,
const char *path,
const char **directory,
const char **basename);
notmuch_status_t
_notmuch_database_find_directory_id (notmuch_database_t *database,
const char *path,
unsigned int *directory_id);
/* thread.cc */