/* notmuch-private.h - Internal interfaces for notmuch. * * 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 */ #ifndef NOTMUCH_PRIVATE_H #define NOTMUCH_PRIVATE_H #ifndef _GNU_SOURCE #define _GNU_SOURCE /* For getline and asprintf */ #endif #include #include "compat.h" #include "notmuch.h" NOTMUCH_BEGIN_DECLS #include #include #include #include #include #include #include #include #include #include #include #include #include "xutil.h" #include "error_util.h" #pragma GCC visibility push(hidden) #ifdef DEBUG # define DEBUG_DATABASE_SANITY 1 # define DEBUG_QUERY 1 #endif #define COMPILE_TIME_ASSERT(pred) ((void)sizeof(char[1 - 2*!(pred)])) #define STRNCMP_LITERAL(var, literal) \ strncmp ((var), (literal), sizeof (literal) - 1) #define unused(x) x __attribute__ ((unused)) #ifdef __cplusplus # define visible __attribute__((visibility("default"))) #else # define visible #endif /* Thanks to Andrew Tridgell's (SAMBA's) talloc for this definition of * unlikely. The talloc source code comes to us via the GNU LGPL v. 3. */ /* these macros gain us a few percent of speed on gcc */ #if (__GNUC__ >= 3) /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1 as its first argument */ #ifndef likely #define likely(x) __builtin_expect(!!(x), 1) #endif #ifndef unlikely #define unlikely(x) __builtin_expect(!!(x), 0) #endif #else #ifndef likely #define likely(x) (x) #endif #ifndef unlikely #define unlikely(x) (x) #endif #endif typedef enum { NOTMUCH_VALUE_TIMESTAMP = 0, NOTMUCH_VALUE_MESSAGE_ID, NOTMUCH_VALUE_FROM, NOTMUCH_VALUE_SUBJECT } notmuch_value_t; /* Xapian (with flint backend) complains if we provide a term longer * than this, but I haven't yet found a way to query the limit * programmatically. */ #define NOTMUCH_TERM_MAX 245 #define NOTMUCH_METADATA_THREAD_ID_PREFIX "thread_id_" /* For message IDs we have to be even more restrictive. Beyond fitting * into the term limit, we also use message IDs to construct * metadata-key values. And the documentation says that these should * be restricted to about 200 characters. (The actual limit for the * chert backend at least is 252.) */ #define NOTMUCH_MESSAGE_ID_MAX (200 - sizeof (NOTMUCH_METADATA_THREAD_ID_PREFIX)) typedef enum _notmuch_private_status { /* First, copy all the public status values. */ NOTMUCH_PRIVATE_STATUS_SUCCESS = NOTMUCH_STATUS_SUCCESS, NOTMUCH_PRIVATE_STATUS_OUT_OF_MEMORY = NOTMUCH_STATUS_OUT_OF_MEMORY, NOTMUCH_PRIVATE_STATUS_READ_ONLY_DATABASE = NOTMUCH_STATUS_READ_ONLY_DATABASE, NOTMUCH_PRIVATE_STATUS_XAPIAN_EXCEPTION = NOTMUCH_STATUS_XAPIAN_EXCEPTION, NOTMUCH_PRIVATE_STATUS_FILE_NOT_EMAIL = NOTMUCH_STATUS_FILE_NOT_EMAIL, NOTMUCH_PRIVATE_STATUS_NULL_POINTER = NOTMUCH_STATUS_NULL_POINTER, NOTMUCH_PRIVATE_STATUS_TAG_TOO_LONG = NOTMUCH_STATUS_TAG_TOO_LONG, NOTMUCH_PRIVATE_STATUS_UNBALANCED_FREEZE_THAW = NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW, /* Then add our own private values. */ NOTMUCH_PRIVATE_STATUS_TERM_TOO_LONG = NOTMUCH_STATUS_LAST_STATUS, NOTMUCH_PRIVATE_STATUS_NO_DOCUMENT_FOUND, NOTMUCH_PRIVATE_STATUS_LAST_STATUS } notmuch_private_status_t; /* Coerce a notmuch_private_status_t value to a notmuch_status_t * value, generating an internal error if the private value is equal * to or greater than NOTMUCH_STATUS_LAST_STATUS. (The idea here is * that the caller has previously handled any expected * notmuch_private_status_t values.) */ #define COERCE_STATUS(private_status, format, ...) \ ((private_status >= (notmuch_private_status_t) NOTMUCH_STATUS_LAST_STATUS)\ ? \ (notmuch_status_t) _internal_error (format " (%s).\n", \ ##__VA_ARGS__, \ __location__) \ : \ (notmuch_status_t) private_status) /* Flags shared by various lookup functions. */ typedef enum _notmuch_find_flags { /* Lookup without creating any documents. This is the default * behavior. */ NOTMUCH_FIND_LOOKUP = 0, /* If set, create the necessary document (or documents) if they * are missing. Requires a read/write database. */ NOTMUCH_FIND_CREATE = 1<<0, } notmuch_find_flags_t; typedef struct _notmuch_doc_id_set notmuch_doc_id_set_t; typedef struct _notmuch_string_list notmuch_string_list_t; /* database.cc */ /* Lookup a prefix value by name. * * XXX: This should really be static inside of message.cc, and we can * do that once we convert database.cc to use the * _notmuch_message_add/remove_term functions. */ const char * _find_prefix (const char *name); notmuch_status_t _notmuch_database_ensure_writable (notmuch_database_t *notmuch); const char * _notmuch_database_relative_path (notmuch_database_t *notmuch, const char *path); notmuch_status_t _notmuch_database_split_path (void *ctx, const char *path, const char **directory, const char **basename); const char * _notmuch_database_get_directory_db_path (const char *path); unsigned int _notmuch_database_generate_doc_id (notmuch_database_t *notmuch); notmuch_private_status_t _notmuch_database_find_unique_doc_id (notmuch_database_t *notmuch, const char *prefix_name, const char *value, unsigned int *doc_id); notmuch_status_t _notmuch_database_find_directory_id (notmuch_database_t *database, const char *path, notmuch_find_flags_t flags, unsigned int *directory_id); const char * _notmuch_database_get_directory_path (void *ctx, notmuch_database_t *notmuch, unsigned int doc_id); notmuch_status_t _notmuch_database_filename_to_direntry (void *ctx, notmuch_database_t *notmuch, const char *filename, notmuch_find_flags_t flags, char **direntry); /* directory.cc */ notmuch_directory_t * _notmuch_directory_create (notmuch_database_t *notmuch, const char *path, notmuch_find_flags_t flags, notmuch_status_t *status_ret); unsigned int _notmuch_directory_get_document_id (notmuch_directory_t *directory); /* thread.cc */ notmuch_thread_t * _notmuch_thread_create (void *ctx, notmuch_database_t *notmuch, unsigned int seed_doc_id, notmuch_doc_id_set_t *match_set, notmuch_string_list_t *excluded_terms, notmuch_sort_t sort); /* message.cc */ notmuch_message_t * _notmuch_message_create (const void *talloc_owner, notmuch_database_t *notmuch, unsigned int doc_id, notmuch_private_status_t *status); notmuch_message_t * _notmuch_message_create_for_message_id (notmuch_database_t *notmuch, const char *message_id, notmuch_private_status_t *status); unsigned int _notmuch_message_get_doc_id (notmuch_message_t *message); const char * _notmuch_message_get_in_reply_to (notmuch_message_t *message); notmuch_private_status_t _notmuch_message_add_term (notmuch_message_t *message, const char *prefix_name, const char *value); notmuch_private_status_t _notmuch_message_remove_term (notmuch_message_t *message, const char *prefix_name, const char *value); notmuch_private_status_t _notmuch_message_gen_terms (notmuch_message_t *message, const char *prefix_name, const char *text); void _notmuch_message_upgrade_filename_storage (notmuch_message_t *message); notmuch_status_t _notmuch_message_add_filename (notmuch_message_t *message, const char *filename); notmuch_status_t _notmuch_message_remove_filename (notmuch_message_t *message, const char *filename); notmuch_status_t _notmuch_message_rename (notmuch_message_t *message, const char *new_filename); void _notmuch_message_ensure_thread_id (notmuch_message_t *message); void _notmuch_message_set_header_values (notmuch_message_t *message, const char *date, const char *from, const char *subject); void _notmuch_message_sync (notmuch_message_t *message); notmuch_status_t _notmuch_message_delete (notmuch_message_t *message); void _notmuch_message_close (notmuch_message_t *message); /* Get a copy of the data in this message document. * * Caller should talloc_free the result when done. * * This function is intended to support database upgrade and really * shouldn't be used otherwise. */ char * _notmuch_message_talloc_copy_data (notmuch_message_t *message); /* Clear the data in this message document. * * This function is intended to support database upgrade and really * shouldn't be used otherwise. */ void _notmuch_message_clear_data (notmuch_message_t *message); /* Set the author member of 'message' - this is the representation used * when displaying the message */ void notmuch_message_set_author (notmuch_message_t *message, const char *author); /* Get the author member of 'message' */ const char * notmuch_message_get_author (notmuch_message_t *message); /* index.cc */ notmuch_status_t _notmuch_message_index_file (notmuch_message_t *message, const char *filename); /* message-file.c */ /* XXX: I haven't decided yet whether these will actually get exported * into the public interface in notmuch.h */ typedef struct _notmuch_message_file notmuch_message_file_t; /* Open a file containing a single email message. * * The caller should call notmuch_message_close when done with this. * * Returns NULL if any error occurs. */ notmuch_message_file_t * notmuch_message_file_open (const char *filename); /* Like notmuch_message_file_open but with 'ctx' as the talloc owner. */ notmuch_message_file_t * _notmuch_message_file_open_ctx (void *ctx, const char *filename); /* Close a notmuch message previously opened with notmuch_message_open. */ void notmuch_message_file_close (notmuch_message_file_t *message); /* Restrict 'message' to only save the named headers. * * When the caller is only interested in a short list of headers, * known in advance, calling this function can avoid wasted time and * memory parsing/saving header values that will never be needed. * * The variable arguments should be a list of const char * with a * final '(const char *) NULL' to terminate the list. * * If this function is called, it must be called before any calls to * notmuch_message_get_header for this message. * * After calling this function, if notmuch_message_get_header is * called with a header name not in this list, then NULL will be * returned even if that header exists in the actual message. */ void notmuch_message_file_restrict_headers (notmuch_message_file_t *message, ...); /* Identical to notmuch_message_restrict_headers but accepting a va_list. */ void notmuch_message_file_restrict_headersv (notmuch_message_file_t *message, va_list va_headers); /* Get the value of the specified header from the message. * * The header name is case insensitive. * * The Received: header is special - for it all Received: headers in * the message are concatenated * * The returned value is owned by the notmuch message and is valid * only until the message is closed. The caller should copy it if * needing to modify the value or to hold onto it for longer. * * Returns NULL if the message does not contain a header line matching * 'header'. */ const char * notmuch_message_file_get_header (notmuch_message_file_t *message, const char *header); /* messages.c */ typedef struct _notmuch_message_node { notmuch_message_t *message; struct _notmuch_message_node *next; } notmuch_message_node_t; typedef struct _notmuch_message_list { notmuch_message_node_t *head; notmuch_message_node_t **tail; } notmuch_message_list_t; /* There's a rumor that there's an alternate struct _notmuch_messages * somewhere with some nasty C++ objects in it. We'll try to maintain * ignorance of that here. (See notmuch_mset_messages_t in query.cc) */ struct visible _notmuch_messages { notmuch_bool_t is_of_list_type; notmuch_doc_id_set_t *excluded_doc_ids; notmuch_message_node_t *iterator; }; notmuch_message_list_t * _notmuch_message_list_create (const void *ctx); void _notmuch_message_list_append (notmuch_message_list_t *list, notmuch_message_node_t *node); void _notmuch_message_list_add_message (notmuch_message_list_t *list, notmuch_message_t *message); notmuch_messages_t * _notmuch_messages_create (notmuch_message_list_t *list); /* query.cc */ notmuch_bool_t _notmuch_mset_messages_valid (notmuch_messages_t *messages); notmuch_message_t * _notmuch_mset_messages_get (notmuch_messages_t *messages); void _notmuch_mset_messages_move_to_next (notmuch_messages_t *messages); notmuch_bool_t _notmuch_doc_id_set_contains (notmuch_doc_id_set_t *doc_ids, unsigned int doc_id); void _notmuch_doc_id_set_remove (notmuch_doc_id_set_t *doc_ids, unsigned int doc_id); /* message.cc */ void _notmuch_message_add_reply (notmuch_message_t *message, notmuch_message_node_t *reply); /* sha1.c */ char * notmuch_sha1_of_string (const char *str); char * notmuch_sha1_of_message (const char *filename); /* string-list.c */ typedef struct _notmuch_string_node { char *string; struct _notmuch_string_node *next; } notmuch_string_node_t; struct visible _notmuch_string_list { int length; notmuch_string_node_t *head; notmuch_string_node_t **tail; }; notmuch_string_list_t * _notmuch_string_list_create (const void *ctx); /* Add 'string' to 'list'. * * The list will create its own talloced copy of 'string'. */ void _notmuch_string_list_append (notmuch_string_list_t *list, const char *string); void _notmuch_string_list_sort (notmuch_string_list_t *list); /* tags.c */ notmuch_tags_t * _notmuch_tags_create (const void *ctx, notmuch_string_list_t *list); /* filenames.c */ /* The notmuch_filenames_t iterates over a notmuch_string_list_t of * file names */ notmuch_filenames_t * _notmuch_filenames_create (const void *ctx, notmuch_string_list_t *list); NOTMUCH_END_DECLS #ifdef __cplusplus /* Implicit typecast from 'void *' to 'T *' is okay in C, but not in * C++. In talloc_steal, an explicit cast is provided for type safety * in some GCC versions. Otherwise, a cast is required. Provide a * template function for this to maintain type safety, and redefine * talloc_steal to use it. */ #if !(__GNUC__ >= 3) template T * _notmuch_talloc_steal (const void *new_ctx, const T *ptr) { return static_cast (talloc_steal (new_ctx, ptr)); } #undef talloc_steal #define talloc_steal _notmuch_talloc_steal #endif #endif #pragma GCC visibility pop #endif