1 /* database-private.h - For peeking into the internals of notmuch_database_t
3 * Copyright © 2009 Carl Worth
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see https://www.gnu.org/licenses/ .
18 * Author: Carl Worth <cworth@cworth.org>
21 #ifndef NOTMUCH_DATABASE_PRIVATE_H
22 #define NOTMUCH_DATABASE_PRIVATE_H
24 /* According to WG14/N1124, a C++ implementation won't provide us a
25 * macro like PRIx64 (which gives a printf format string for
26 * formatting a uint64_t as hexadecimal) unless we define
27 * __STDC_FORMAT_MACROS before including inttypes.h. That's annoying,
30 #define __STDC_FORMAT_MACROS
33 #include "notmuch-private.h"
35 #define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr[0]))
37 #ifdef SILENCE_XAPIAN_DEPRECATION_WARNINGS
38 #define XAPIAN_DEPRECATED(D) D
47 /* Bit masks for _notmuch_database::features. Features are named,
48 * independent aspects of the database schema.
50 * A database stores the set of features that it "uses" (implicitly
51 * before database version 3 and explicitly as of version 3).
53 * A given library version will "recognize" a particular set of
54 * features; if a database uses a feature that the library does not
55 * recognize, the library will refuse to open it. It is assumed the
56 * set of recognized features grows monotonically over time. A
57 * library version will "implement" some subset of the recognized
58 * features: some operations may require that the database use (or not
59 * use) some feature, while other operations may support both
60 * databases that use and that don't use some feature.
62 * On disk, the database stores string names for these features (see
63 * the feature_names array). These enum bit values are never
64 * persisted to disk and may change freely.
66 enum _notmuch_features {
67 /* If set, file names are stored in "file-direntry" terms. If
68 * unset, file names are stored in document data.
70 * Introduced: version 1. */
71 NOTMUCH_FEATURE_FILE_TERMS = 1 << 0,
73 /* If set, directory timestamps are stored in documents with
74 * XDIRECTORY terms and relative paths. If unset, directory
75 * timestamps are stored in documents with XTIMESTAMP terms and
78 * Introduced: version 1. */
79 NOTMUCH_FEATURE_DIRECTORY_DOCS = 1 << 1,
81 /* If set, the from, subject, and message-id headers are stored in
82 * message document values. If unset, message documents *may*
83 * have these values, but if the value is empty, it must be
84 * retrieved from the message file.
86 * Introduced: optional in version 1, required as of version 3.
88 NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES = 1 << 2,
90 /* If set, folder terms are boolean and path terms exist. If
91 * unset, folder terms are probabilistic and stemmed and path
94 * Introduced: version 2. */
95 NOTMUCH_FEATURE_BOOL_FOLDER = 1 << 3,
97 /* If set, missing messages are stored in ghost mail documents.
98 * If unset, thread IDs of ghost messages are stored as database
99 * metadata instead of in ghost documents.
101 * Introduced: version 3. */
102 NOTMUCH_FEATURE_GHOSTS = 1 << 4,
105 /* If set, then the database was created after the introduction of
106 * indexed mime types. If unset, then the database may contain a
107 * mixture of messages with indexed and non-indexed mime types.
109 * Introduced: version 3. */
110 NOTMUCH_FEATURE_INDEXED_MIMETYPES = 1 << 5,
112 /* If set, messages store the revision number of the last
113 * modification in NOTMUCH_VALUE_LAST_MOD.
115 * Introduced: version 3. */
116 NOTMUCH_FEATURE_LAST_MOD = 1 << 6,
118 /* If set, unprefixed terms are stored only for the message body,
121 * Introduced: version 3. */
122 NOTMUCH_FEATURE_UNPREFIX_BODY_ONLY = 1 << 7,
125 /* In C++, a named enum is its own type, so define bitwise operators
126 * on _notmuch_features. */
127 inline _notmuch_features
128 operator| (_notmuch_features a, _notmuch_features b)
130 return static_cast<_notmuch_features>(
131 static_cast<unsigned>(a) | static_cast<unsigned>(b));
134 inline _notmuch_features
135 operator& (_notmuch_features a, _notmuch_features b)
137 return static_cast<_notmuch_features>(
138 static_cast<unsigned>(a) & static_cast<unsigned>(b));
141 inline _notmuch_features
142 operator~ (_notmuch_features a)
144 return static_cast<_notmuch_features>(~static_cast<unsigned>(a));
147 inline _notmuch_features&
148 operator|= (_notmuch_features &a, _notmuch_features b)
154 inline _notmuch_features&
155 operator&= (_notmuch_features &a, _notmuch_features b)
162 * Configuration options for xapian database fields */
163 typedef enum notmuch_field_flags {
164 NOTMUCH_FIELD_NO_FLAGS = 0,
165 NOTMUCH_FIELD_EXTERNAL = 1 << 0,
166 NOTMUCH_FIELD_PROBABILISTIC = 1 << 1,
167 NOTMUCH_FIELD_PROCESSOR = 1 << 2,
168 } notmuch_field_flag_t;
171 * define bitwise operators to hide casts */
172 inline notmuch_field_flag_t
173 operator| (notmuch_field_flag_t a, notmuch_field_flag_t b)
175 return static_cast<notmuch_field_flag_t>(
176 static_cast<unsigned>(a) | static_cast<unsigned>(b));
179 inline notmuch_field_flag_t
180 operator& (notmuch_field_flag_t a, notmuch_field_flag_t b)
182 return static_cast<notmuch_field_flag_t>(
183 static_cast<unsigned>(a) & static_cast<unsigned>(b));
186 #define NOTMUCH_QUERY_PARSER_FLAGS (Xapian::QueryParser::FLAG_BOOLEAN | \
187 Xapian::QueryParser::FLAG_PHRASE | \
188 Xapian::QueryParser::FLAG_LOVEHATE | \
189 Xapian::QueryParser::FLAG_BOOLEAN_ANY_CASE | \
190 Xapian::QueryParser::FLAG_WILDCARD | \
191 Xapian::QueryParser::FLAG_PURE_NOT)
193 struct _notmuch_database {
194 bool exception_reported;
196 /* Path to actual database */
197 const char *xapian_path;
199 /* Path to config loaded, if any */
200 const char *config_path;
203 /* true if changes have been made in this atomic section */
205 Xapian::Database *xapian_db;
206 Xapian::WritableDatabase *writable_xapian_db;
208 /* Bit mask of features used by this database. This is a
209 * bitwise-OR of NOTMUCH_FEATURE_* values (above). */
210 enum _notmuch_features features;
212 unsigned int last_doc_id;
214 /* 16 bytes (+ terminator) for hexadecimal representation of
215 * a 64-bit integer. */
216 char thread_id_str[17];
217 uint64_t last_thread_id;
219 /* How many transactions have successfully completed since we last committed */
220 int transaction_count;
221 /* when to commit and reset the counter */
222 int transaction_threshold;
224 /* error reporting; this value persists only until the
225 * next library call. May be NULL */
228 /* Highest committed revision number. Modifications are recorded
229 * under a higher revision number, which can be generated with
230 * notmuch_database_new_revision. */
231 unsigned long revision;
234 /* Keep track of the number of times the database has been re-opened
235 * (or other global invalidations of notmuch's caching)
238 Xapian::QueryParser *query_parser;
239 Xapian::Stem *stemmer;
240 Xapian::TermGenerator *term_gen;
241 Xapian::RangeProcessor *value_range_processor;
242 Xapian::RangeProcessor *date_range_processor;
243 Xapian::RangeProcessor *last_mod_range_processor;
245 /* XXX it's slightly gross to use two parallel string->string maps
246 * here, but at least they are small */
247 notmuch_string_map_t *user_prefix;
248 notmuch_string_map_t *user_header;
250 /* Cached and possibly overridden configuration */
251 notmuch_string_map_t *config;
254 /* Prior to database version 3, features were implied by the database
255 * version number, so hard-code them for earlier versions. */
256 #define NOTMUCH_FEATURES_V0 ((enum _notmuch_features) 0)
257 #define NOTMUCH_FEATURES_V1 (NOTMUCH_FEATURES_V0 | NOTMUCH_FEATURE_FILE_TERMS | \
258 NOTMUCH_FEATURE_DIRECTORY_DOCS)
259 #define NOTMUCH_FEATURES_V2 (NOTMUCH_FEATURES_V1 | NOTMUCH_FEATURE_BOOL_FOLDER)
261 /* Current database features. If any of these are missing from a
262 * database, request an upgrade.
263 * NOTMUCH_FEATURE_FROM_SUBJECT_ID_VALUES and
264 * NOTMUCH_FEATURE_INDEXED_MIMETYPES are not included because upgrade
265 * doesn't currently introduce the features (though brand new databases
267 #define NOTMUCH_FEATURES_CURRENT \
268 (NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_DIRECTORY_DOCS | \
269 NOTMUCH_FEATURE_BOOL_FOLDER | NOTMUCH_FEATURE_GHOSTS | \
270 NOTMUCH_FEATURE_LAST_MOD)
272 /* Return the list of terms from the given iterator matching a prefix.
273 * The prefix will be stripped from the strings in the returned list.
274 * The list will be allocated using ctx as the talloc context.
276 * The function returns NULL on failure.
278 notmuch_string_list_t *
279 _notmuch_database_get_terms_with_prefix (void *ctx, Xapian::TermIterator &i,
280 Xapian::TermIterator &end,
284 _notmuch_database_find_doc_ids (notmuch_database_t *notmuch,
285 const char *prefix_name,
287 Xapian::PostingIterator *begin,
288 Xapian::PostingIterator *end);
290 #define NOTMUCH_DATABASE_VERSION 3
295 _notmuch_database_parse_features (const void *ctx, const char *features, unsigned int version,
296 char mode, char **incompat_out);
299 _notmuch_database_print_features (const void *ctx, unsigned int features);
303 _notmuch_database_setup_standard_query_fields (notmuch_database_t *notmuch);
306 _notmuch_database_setup_user_query_fields (notmuch_database_t *notmuch);
311 _notmuch_query_string_to_xapian_query (notmuch_database_t *notmuch,
312 std::string query_string,
313 Xapian::Query &output,
317 _notmuch_sexp_string_to_xapian_query (notmuch_database_t *notmuch, const char *querystr,
318 Xapian::Query &output);
321 _notmuch_query_expand (notmuch_database_t *notmuch, const char *field, Xapian::Query subquery,
322 Xapian::Query &output, std::string &msg);
324 /* regexp-fields.cc */
326 _notmuch_regexp_to_query (notmuch_database_t *notmuch, Xapian::valueno slot, std::string field,
327 std::string regexp_str,
328 Xapian::Query &output, std::string &msg);
332 _notmuch_query_name_to_query (notmuch_database_t *notmuch, const std::string name,
333 Xapian::Query &output);
338 _notmuch_sexp_string_to_xapian_query (notmuch_database_t *notmuch, const char *querystr,
339 Xapian::Query &output);