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/* database-private.h - For peeking into the internals of notmuch_database_t
*
* Copyright © 2009 Carl Worth
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: Carl Worth <cworth@cworth.org>
*/
#ifndef NOTMUCH_DATABASE_PRIVATE_H
#define NOTMUCH_DATABASE_PRIVATE_H
/* According to WG14/N1124, a C++ implementation won't provide us a
* macro like PRIx64 (which gives a printf format string for
* formatting a uint64_t as hexadecimal) unless we define
* __STDC_FORMAT_MACROS before including inttypes.h. That's annoying,
* but there it is.
*/
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include "notmuch-private.h"
#include <xapian.h>
#pragma GCC visibility push(hidden)
/* Bit masks for _notmuch_database::features. Features are named,
* independent aspects of the database schema.
*
* A database stores the set of features that it "uses" (implicitly
* before database version 3 and explicitly as of version 3).
*
* A given library version will "recognize" a particular set of
* features; if a database uses a feature that the library does not
* recognize, the library will refuse to open it. It is assumed the
* set of recognized features grows monotonically over time. A
* library version will "implement" some subset of the recognized
* features: some operations may require that the database use (or not
* use) some feature, while other operations may support both
* databases that use and that don't use some feature.
*
* On disk, the database stores string names for these features (see
* the feature_names array). These enum bit values are never
* persisted to disk and may change freely.
*/
enum _notmuch_features {
/* If set, file names are stored in "file-direntry" terms. If
* unset, file names are stored in document data.
*
* Introduced: version 1. */
NOTMUCH_FEATURE_FILE_TERMS = 1 << 0,
/* If set, directory timestamps are stored in documents with
* XDIRECTORY terms and relative paths. If unset, directory
* timestamps are stored in documents with XTIMESTAMP terms and
* absolute paths.
*
* Introduced: version 1. */
NOTMUCH_FEATURE_DIRECTORY_DOCS = 1 << 1,
/* If set, the from, subject, and message-id headers are stored in
* message document values. If unset, message documents *may*
* have these values, but if the value is empty, it must be
* retrieved from the message file.
*
* Introduced: optional in version 1, required as of version 3.
*/
NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES = 1 << 2,
/* If set, folder terms are boolean and path terms exist. If
* unset, folder terms are probabilistic and stemmed and path
* terms do not exist.
*
* Introduced: version 2. */
NOTMUCH_FEATURE_BOOL_FOLDER = 1 << 3,
};
/* In C++, a named enum is its own type, so define bitwise operators
* on _notmuch_features. */
inline _notmuch_features
operator|(_notmuch_features a, _notmuch_features b)
{
return static_cast<_notmuch_features>(
static_cast<unsigned>(a) | static_cast<unsigned>(b));
}
inline _notmuch_features
operator&(_notmuch_features a, _notmuch_features b)
{
return static_cast<_notmuch_features>(
static_cast<unsigned>(a) & static_cast<unsigned>(b));
}
inline _notmuch_features
operator~(_notmuch_features a)
{
return static_cast<_notmuch_features>(~static_cast<unsigned>(a));
}
inline _notmuch_features&
operator|=(_notmuch_features &a, _notmuch_features b)
{
a = a | b;
return a;
}
inline _notmuch_features&
operator&=(_notmuch_features &a, _notmuch_features b)
{
a = a & b;
return a;
}
struct _notmuch_database {
notmuch_bool_t exception_reported;
char *path;
notmuch_database_mode_t mode;
int atomic_nesting;
Xapian::Database *xapian_db;
/* Bit mask of features used by this database. This is a
* bitwise-OR of NOTMUCH_FEATURE_* values (above). */
enum _notmuch_features features;
unsigned int last_doc_id;
uint64_t last_thread_id;
Xapian::QueryParser *query_parser;
Xapian::TermGenerator *term_gen;
Xapian::ValueRangeProcessor *value_range_processor;
Xapian::ValueRangeProcessor *date_range_processor;
};
/* Prior to database version 3, features were implied by the database
* version number, so hard-code them for earlier versions. */
#define NOTMUCH_FEATURES_V0 ((enum _notmuch_features)0)
#define NOTMUCH_FEATURES_V1 (NOTMUCH_FEATURES_V0 | NOTMUCH_FEATURE_FILE_TERMS | \
NOTMUCH_FEATURE_DIRECTORY_DOCS)
#define NOTMUCH_FEATURES_V2 (NOTMUCH_FEATURES_V1 | NOTMUCH_FEATURE_BOOL_FOLDER)
/* Current database features. If any of these are missing from a
* database, request an upgrade.
* NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES is not included because
* upgrade doesn't currently introduce the feature (though brand new
* databases will have it). */
#define NOTMUCH_FEATURES_CURRENT \
(NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_DIRECTORY_DOCS | \
NOTMUCH_FEATURE_BOOL_FOLDER)
/* Return the list of terms from the given iterator matching a prefix.
* The prefix will be stripped from the strings in the returned list.
* The list will be allocated using ctx as the talloc context.
*
* The function returns NULL on failure.
*/
notmuch_string_list_t *
_notmuch_database_get_terms_with_prefix (void *ctx, Xapian::TermIterator &i,
Xapian::TermIterator &end,
const char *prefix);
#pragma GCC visibility pop
#endif
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