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498 lines
14 KiB
C
498 lines
14 KiB
C
/* notmuch-private.h - Internal interfaces for notmuch.
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*
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* Copyright © 2009 Carl Worth
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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*/
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#ifndef NOTMUCH_PRIVATE_H
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#define NOTMUCH_PRIVATE_H
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE /* For getline and asprintf */
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#endif
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#include <stdio.h>
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#include "compat.h"
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#include "notmuch.h"
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NOTMUCH_BEGIN_DECLS
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#include <stdlib.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <assert.h>
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#include <talloc.h>
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#include "xutil.h"
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#include "error_util.h"
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#pragma GCC visibility push(hidden)
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#ifdef DEBUG
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# define DEBUG_DATABASE_SANITY 1
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# define DEBUG_QUERY 1
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#endif
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#define COMPILE_TIME_ASSERT(pred) ((void)sizeof(char[1 - 2*!(pred)]))
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#define STRNCMP_LITERAL(var, literal) \
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strncmp ((var), (literal), sizeof (literal) - 1)
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#define unused(x) x __attribute__ ((unused))
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#ifdef __cplusplus
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# define visible __attribute__((visibility("default")))
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#else
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# define visible
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#endif
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/* Thanks to Andrew Tridgell's (SAMBA's) talloc for this definition of
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* unlikely. The talloc source code comes to us via the GNU LGPL v. 3.
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*/
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/* these macros gain us a few percent of speed on gcc */
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#if (__GNUC__ >= 3)
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/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
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as its first argument */
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#ifndef likely
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#define likely(x) __builtin_expect(!!(x), 1)
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#endif
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#ifndef unlikely
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#else
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#ifndef likely
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#define likely(x) (x)
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#endif
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#ifndef unlikely
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#define unlikely(x) (x)
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#endif
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#endif
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typedef enum {
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NOTMUCH_VALUE_TIMESTAMP = 0,
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NOTMUCH_VALUE_MESSAGE_ID,
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NOTMUCH_VALUE_FROM,
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NOTMUCH_VALUE_SUBJECT
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} notmuch_value_t;
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/* Xapian (with flint backend) complains if we provide a term longer
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* than this, but I haven't yet found a way to query the limit
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* programmatically. */
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#define NOTMUCH_TERM_MAX 245
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#define NOTMUCH_METADATA_THREAD_ID_PREFIX "thread_id_"
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/* For message IDs we have to be even more restrictive. Beyond fitting
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* into the term limit, we also use message IDs to construct
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* metadata-key values. And the documentation says that these should
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* be restricted to about 200 characters. (The actual limit for the
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* chert backend at least is 252.)
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*/
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#define NOTMUCH_MESSAGE_ID_MAX (200 - sizeof (NOTMUCH_METADATA_THREAD_ID_PREFIX))
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typedef enum _notmuch_private_status {
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/* First, copy all the public status values. */
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NOTMUCH_PRIVATE_STATUS_SUCCESS = NOTMUCH_STATUS_SUCCESS,
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NOTMUCH_PRIVATE_STATUS_OUT_OF_MEMORY = NOTMUCH_STATUS_OUT_OF_MEMORY,
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NOTMUCH_PRIVATE_STATUS_READ_ONLY_DATABASE = NOTMUCH_STATUS_READ_ONLY_DATABASE,
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NOTMUCH_PRIVATE_STATUS_XAPIAN_EXCEPTION = NOTMUCH_STATUS_XAPIAN_EXCEPTION,
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NOTMUCH_PRIVATE_STATUS_FILE_NOT_EMAIL = NOTMUCH_STATUS_FILE_NOT_EMAIL,
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NOTMUCH_PRIVATE_STATUS_NULL_POINTER = NOTMUCH_STATUS_NULL_POINTER,
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NOTMUCH_PRIVATE_STATUS_TAG_TOO_LONG = NOTMUCH_STATUS_TAG_TOO_LONG,
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NOTMUCH_PRIVATE_STATUS_UNBALANCED_FREEZE_THAW = NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW,
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/* Then add our own private values. */
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NOTMUCH_PRIVATE_STATUS_TERM_TOO_LONG = NOTMUCH_STATUS_LAST_STATUS,
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NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND,
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NOTMUCH_PRIVATE_STATUS_LAST_STATUS
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} notmuch_private_status_t;
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/* Coerce a notmuch_private_status_t value to a notmuch_status_t
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* value, generating an internal error if the private value is equal
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* to or greater than NOTMUCH_STATUS_LAST_STATUS. (The idea here is
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* that the caller has previously handled any expected
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* notmuch_private_status_t values.)
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*/
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#define COERCE_STATUS(private_status, format, ...) \
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((private_status >= (notmuch_private_status_t) NOTMUCH_STATUS_LAST_STATUS)\
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? \
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(notmuch_status_t) _internal_error (format " (%s).\n", \
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##__VA_ARGS__, \
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__location__) \
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: \
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(notmuch_status_t) private_status)
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typedef struct _notmuch_doc_id_set notmuch_doc_id_set_t;
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/* database.cc */
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/* Lookup a prefix value by name.
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*
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* XXX: This should really be static inside of message.cc, and we can
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* do that once we convert database.cc to use the
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* _notmuch_message_add/remove_term functions. */
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const char *
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_find_prefix (const char *name);
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notmuch_status_t
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_notmuch_database_ensure_writable (notmuch_database_t *notmuch);
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const char *
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_notmuch_database_relative_path (notmuch_database_t *notmuch,
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const char *path);
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notmuch_status_t
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_notmuch_database_split_path (void *ctx,
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const char *path,
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const char **directory,
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const char **basename);
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const char *
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_notmuch_database_get_directory_db_path (const char *path);
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unsigned int
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_notmuch_database_generate_doc_id (notmuch_database_t *notmuch);
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notmuch_private_status_t
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_notmuch_database_find_unique_doc_id (notmuch_database_t *notmuch,
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const char *prefix_name,
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const char *value,
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unsigned int *doc_id);
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notmuch_status_t
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_notmuch_database_find_directory_id (notmuch_database_t *database,
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const char *path,
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unsigned int *directory_id);
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const char *
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_notmuch_database_get_directory_path (void *ctx,
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notmuch_database_t *notmuch,
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unsigned int doc_id);
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notmuch_status_t
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_notmuch_database_filename_to_direntry (void *ctx,
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notmuch_database_t *notmuch,
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const char *filename,
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char **direntry);
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/* directory.cc */
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notmuch_directory_t *
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_notmuch_directory_create (notmuch_database_t *notmuch,
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const char *path,
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notmuch_status_t *status_ret);
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unsigned int
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_notmuch_directory_get_document_id (notmuch_directory_t *directory);
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/* thread.cc */
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notmuch_thread_t *
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_notmuch_thread_create (void *ctx,
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notmuch_database_t *notmuch,
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unsigned int seed_doc_id,
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notmuch_doc_id_set_t *match_set,
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notmuch_sort_t sort);
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/* message.cc */
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notmuch_message_t *
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_notmuch_message_create (const void *talloc_owner,
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notmuch_database_t *notmuch,
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unsigned int doc_id,
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notmuch_private_status_t *status);
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notmuch_message_t *
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_notmuch_message_create_for_message_id (notmuch_database_t *notmuch,
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const char *message_id,
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notmuch_private_status_t *status);
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unsigned int
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_notmuch_message_get_doc_id (notmuch_message_t *message);
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const char *
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_notmuch_message_get_in_reply_to (notmuch_message_t *message);
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notmuch_private_status_t
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_notmuch_message_add_term (notmuch_message_t *message,
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const char *prefix_name,
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const char *value);
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notmuch_private_status_t
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_notmuch_message_remove_term (notmuch_message_t *message,
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const char *prefix_name,
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const char *value);
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notmuch_private_status_t
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_notmuch_message_gen_terms (notmuch_message_t *message,
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const char *prefix_name,
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const char *text);
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void
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_notmuch_message_upgrade_filename_storage (notmuch_message_t *message);
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notmuch_status_t
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_notmuch_message_add_filename (notmuch_message_t *message,
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const char *filename);
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notmuch_status_t
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_notmuch_message_remove_filename (notmuch_message_t *message,
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const char *filename);
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notmuch_status_t
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_notmuch_message_rename (notmuch_message_t *message,
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const char *new_filename);
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void
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_notmuch_message_ensure_thread_id (notmuch_message_t *message);
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void
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_notmuch_message_set_header_values (notmuch_message_t *message,
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const char *date,
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const char *from,
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const char *subject);
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void
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_notmuch_message_sync (notmuch_message_t *message);
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notmuch_status_t
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_notmuch_message_delete (notmuch_message_t *message);
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void
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_notmuch_message_close (notmuch_message_t *message);
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/* Get a copy of the data in this message document.
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*
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* Caller should talloc_free the result when done.
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*
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* This function is intended to support database upgrade and really
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* shouldn't be used otherwise. */
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char *
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_notmuch_message_talloc_copy_data (notmuch_message_t *message);
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/* Clear the data in this message document.
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*
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* This function is intended to support database upgrade and really
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* shouldn't be used otherwise. */
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void
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_notmuch_message_clear_data (notmuch_message_t *message);
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/* Set the author member of 'message' - this is the representation used
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* when displaying the message */
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void
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notmuch_message_set_author (notmuch_message_t *message, const char *author);
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/* Get the author member of 'message' */
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const char *
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notmuch_message_get_author (notmuch_message_t *message);
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/* index.cc */
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notmuch_status_t
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_notmuch_message_index_file (notmuch_message_t *message,
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const char *filename);
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/* message-file.c */
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/* XXX: I haven't decided yet whether these will actually get exported
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* into the public interface in notmuch.h
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*/
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typedef struct _notmuch_message_file notmuch_message_file_t;
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/* Open a file containing a single email message.
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*
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* The caller should call notmuch_message_close when done with this.
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*
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* Returns NULL if any error occurs.
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*/
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notmuch_message_file_t *
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notmuch_message_file_open (const char *filename);
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/* Like notmuch_message_file_open but with 'ctx' as the talloc owner. */
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notmuch_message_file_t *
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_notmuch_message_file_open_ctx (void *ctx, const char *filename);
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/* Close a notmuch message previously opened with notmuch_message_open. */
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void
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notmuch_message_file_close (notmuch_message_file_t *message);
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/* Restrict 'message' to only save the named headers.
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*
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* When the caller is only interested in a short list of headers,
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* known in advance, calling this function can avoid wasted time and
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* memory parsing/saving header values that will never be needed.
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*
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* The variable arguments should be a list of const char * with a
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* final '(const char *) NULL' to terminate the list.
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*
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* If this function is called, it must be called before any calls to
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* notmuch_message_get_header for this message.
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*
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* After calling this function, if notmuch_message_get_header is
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* called with a header name not in this list, then NULL will be
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* returned even if that header exists in the actual message.
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*/
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void
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notmuch_message_file_restrict_headers (notmuch_message_file_t *message, ...);
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/* Identical to notmuch_message_restrict_headers but accepting a va_list. */
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void
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notmuch_message_file_restrict_headersv (notmuch_message_file_t *message,
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va_list va_headers);
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/* Get the value of the specified header from the message.
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*
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* The header name is case insensitive.
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*
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* The Received: header is special - for it all Received: headers in
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* the message are concatenated
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*
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* The returned value is owned by the notmuch message and is valid
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* only until the message is closed. The caller should copy it if
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* needing to modify the value or to hold onto it for longer.
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*
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* Returns NULL if the message does not contain a header line matching
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* 'header'.
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*/
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const char *
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notmuch_message_file_get_header (notmuch_message_file_t *message,
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const char *header);
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/* messages.c */
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typedef struct _notmuch_message_node {
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notmuch_message_t *message;
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struct _notmuch_message_node *next;
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} notmuch_message_node_t;
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typedef struct _notmuch_message_list {
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notmuch_message_node_t *head;
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notmuch_message_node_t **tail;
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} notmuch_message_list_t;
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/* There's a rumor that there's an alternate struct _notmuch_messages
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* somewhere with some nasty C++ objects in it. We'll try to maintain
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* ignorance of that here. (See notmuch_mset_messages_t in query.cc)
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*/
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struct visible _notmuch_messages {
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notmuch_bool_t is_of_list_type;
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notmuch_message_node_t *iterator;
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};
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notmuch_message_list_t *
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_notmuch_message_list_create (const void *ctx);
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void
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_notmuch_message_list_append (notmuch_message_list_t *list,
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notmuch_message_node_t *node);
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void
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_notmuch_message_list_add_message (notmuch_message_list_t *list,
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notmuch_message_t *message);
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notmuch_messages_t *
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_notmuch_messages_create (notmuch_message_list_t *list);
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/* query.cc */
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notmuch_bool_t
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_notmuch_mset_messages_valid (notmuch_messages_t *messages);
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notmuch_message_t *
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_notmuch_mset_messages_get (notmuch_messages_t *messages);
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void
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_notmuch_mset_messages_move_to_next (notmuch_messages_t *messages);
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notmuch_bool_t
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_notmuch_doc_id_set_contains (notmuch_doc_id_set_t *doc_ids,
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unsigned int doc_id);
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void
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_notmuch_doc_id_set_remove (notmuch_doc_id_set_t *doc_ids,
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unsigned int doc_id);
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/* message.cc */
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void
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_notmuch_message_add_reply (notmuch_message_t *message,
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notmuch_message_node_t *reply);
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/* sha1.c */
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char *
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notmuch_sha1_of_string (const char *str);
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char *
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notmuch_sha1_of_file (const char *filename);
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/* string-list.c */
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typedef struct _notmuch_string_node {
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char *string;
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struct _notmuch_string_node *next;
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} notmuch_string_node_t;
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typedef struct visible _notmuch_string_list {
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int length;
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notmuch_string_node_t *head;
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notmuch_string_node_t **tail;
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} notmuch_string_list_t;
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notmuch_string_list_t *
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_notmuch_string_list_create (const void *ctx);
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/* Add 'string' to 'list'.
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*
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* The list will create its own talloced copy of 'string'.
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*/
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void
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_notmuch_string_list_append (notmuch_string_list_t *list,
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const char *string);
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void
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_notmuch_string_list_sort (notmuch_string_list_t *list);
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/* tags.c */
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notmuch_tags_t *
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_notmuch_tags_create (const void *ctx, notmuch_string_list_t *list);
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/* filenames.c */
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/* The notmuch_filenames_t iterates over a notmuch_string_list_t of
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* file names */
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notmuch_filenames_t *
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_notmuch_filenames_create (const void *ctx,
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notmuch_string_list_t *list);
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#pragma GCC visibility pop
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NOTMUCH_END_DECLS
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#endif
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