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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 https://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"
#define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr[0]))
#ifdef SILENCE_XAPIAN_DEPRECATION_WARNINGS
#define XAPIAN_DEPRECATED(D) D
#endif
#include <xapian.h>
/* 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,
/* If set, missing messages are stored in ghost mail documents.
* If unset, thread IDs of ghost messages are stored as database
* metadata instead of in ghost documents.
*
* Introduced: version 3. */
NOTMUCH_FEATURE_GHOSTS = 1 << 4,
/* If set, then the database was created after the introduction of
* indexed mime types. If unset, then the database may contain a
* mixture of messages with indexed and non-indexed mime types.
*
* Introduced: version 3. */
NOTMUCH_FEATURE_INDEXED_MIMETYPES = 1 << 5,
/* If set, messages store the revision number of the last
* modification in NOTMUCH_VALUE_LAST_MOD.
*
* Introduced: version 3. */
NOTMUCH_FEATURE_LAST_MOD = 1 << 6,
/* If set, unprefixed terms are stored only for the message body,
* not for headers.
*
* Introduced: version 3. */
NOTMUCH_FEATURE_UNPREFIX_BODY_ONLY = 1 << 7,
};
/* 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;
}
/*
* Configuration options for xapian database fields */
typedef enum notmuch_field_flags {
NOTMUCH_FIELD_NO_FLAGS = 0,
NOTMUCH_FIELD_EXTERNAL = 1 << 0,
NOTMUCH_FIELD_PROBABILISTIC = 1 << 1,
NOTMUCH_FIELD_PROCESSOR = 1 << 2,
} notmuch_field_flag_t;
/*
* define bitwise operators to hide casts */
inline notmuch_field_flag_t
operator| (notmuch_field_flag_t a, notmuch_field_flag_t b)
{
return static_cast<notmuch_field_flag_t>(
static_cast<unsigned>(a) | static_cast<unsigned>(b));
}
inline notmuch_field_flag_t
operator& (notmuch_field_flag_t a, notmuch_field_flag_t b)
{
return static_cast<notmuch_field_flag_t>(
static_cast<unsigned>(a) & static_cast<unsigned>(b));
}
#define NOTMUCH_QUERY_PARSER_FLAGS (Xapian::QueryParser::FLAG_BOOLEAN | \
Xapian::QueryParser::FLAG_PHRASE | \
Xapian::QueryParser::FLAG_LOVEHATE | \
Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE | \
Xapian::QueryParser::FLAG_WILDCARD | \
Xapian::QueryParser::FLAG_PURE_NOT)
struct _notmuch_database {
bool exception_reported;
/* Path to database parent directory and or/mail root */
char *path;
/* Path to actual database */
const char *xapian_path;
int atomic_nesting;
/* true if changes have been made in this atomic section */
bool atomic_dirty;
Xapian::Database *xapian_db;
Xapian::WritableDatabase *writable_xapian_db;
bool open;
/* 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;
/* error reporting; this value persists only until the
* next library call. May be NULL */
char *status_string;
/* Highest committed revision number. Modifications are recorded
* under a higher revision number, which can be generated with
* notmuch_database_new_revision. */
unsigned long revision;
const char *uuid;
/* Keep track of the number of times the database has been re-opened
* (or other global invalidations of notmuch's caching)
*/
unsigned long view;
Xapian::QueryParser *query_parser;
Xapian::TermGenerator *term_gen;
Xapian::RangeProcessor *value_range_processor;
Xapian::RangeProcessor *date_range_processor;
Xapian::RangeProcessor *last_mod_range_processor;
/* XXX it's slightly gross to use two parallel string->string maps
* here, but at least they are small */
notmuch_string_map_t *user_prefix;
notmuch_string_map_t *user_header;
/* Cached and possibly overridden configuration */
notmuch_string_map_t *config;
};
/* 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 and
* NOTMUCH_FEATURE_INDEXED_MIMETYPES are not included because upgrade
* doesn't currently introduce the features (though brand new databases
* will have it). */
#define NOTMUCH_FEATURES_CURRENT \
(NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_DIRECTORY_DOCS | \
NOTMUCH_FEATURE_BOOL_FOLDER | NOTMUCH_FEATURE_GHOSTS | \
NOTMUCH_FEATURE_LAST_MOD)
/* 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);
void
_notmuch_database_find_doc_ids (notmuch_database_t *notmuch,
const char *prefix_name,
const char *value,
Xapian::PostingIterator *begin,
Xapian::PostingIterator *end);
#define NOTMUCH_DATABASE_VERSION 3
/* features.cc */
_notmuch_features
_notmuch_database_parse_features (const void *ctx, const char *features, unsigned int version,
char mode, char **incompat_out);
char *
_notmuch_database_print_features (const void *ctx, unsigned int features);
/* prefix.cc */
notmuch_status_t
_notmuch_database_setup_standard_query_fields (notmuch_database_t *notmuch);
notmuch_status_t
_notmuch_database_setup_user_query_fields (notmuch_database_t *notmuch);
#endif
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