* refactoring: split src/ into mu/ and lib/
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djcb
268
lib/mu-store-read.cc
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268
lib/mu-store-read.cc
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/* -*-mode: c++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8-*- */
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/*
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** Copyright (C) 2008-2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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**
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** This program is free software; you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by the
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** Free Software Foundation; either version 3, or (at your option) any
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** 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, write to the Free Software Foundation,
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** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif /*HAVE_CONFIG_H*/
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#include <cstdio>
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#include <xapian.h>
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#include <cstring>
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#include <stdexcept>
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#include "mu-store.h"
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#include "mu-store-priv.hh" /* _MuStore */
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#include "mu-msg.h"
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#include "mu-msg-part.h"
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#include "mu-store.h"
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#include "mu-util.h"
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#include "mu-str.h"
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#include "mu-date.h"
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#include "mu-flags.h"
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#include "mu-contacts.h"
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// note: not re-entrant
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const char*
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_MuStore::get_uid_term (const char* path)
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{
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// combination of DJB, BKDR hash functions to get a 64 bit
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// value
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unsigned djbhash, bkdrhash, bkdrseed;
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unsigned u;
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static char hex[18];
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static const char uid_prefix =
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mu_msg_field_xapian_prefix(MU_MSG_FIELD_ID_UID);
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djbhash = 5381;
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bkdrhash = 0;
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bkdrseed = 1313;
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for(u = 0; path[u]; ++u) {
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djbhash = ((djbhash << 5) + djbhash) + path[u];
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bkdrhash = bkdrhash * bkdrseed + path[u];
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}
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snprintf (hex, sizeof(hex), "%c%08x%08x",
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uid_prefix, djbhash, bkdrhash);
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return hex;
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}
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MuStore*
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mu_store_new_read_only (const char* xpath, GError **err)
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{
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g_return_val_if_fail (xpath, NULL);
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try {
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return new _MuStore (xpath);
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} catch (const MuStoreError& merr) {
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mu_util_g_set_error (err, merr.mu_error(), "%s",
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merr.what().c_str());
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR(err, MU_ERROR_XAPIAN);
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return NULL;
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}
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gboolean
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mu_store_is_read_only (MuStore *store)
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{
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g_return_val_if_fail (store, FALSE);
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try {
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return store->is_read_only() ? TRUE : FALSE;
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} MU_XAPIAN_CATCH_BLOCK_RETURN(FALSE);
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}
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unsigned
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mu_store_count (MuStore *store, GError **err)
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{
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g_return_val_if_fail (store, (unsigned)-1);
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try {
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return store->db_read_only()->get_doccount();
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN(err, MU_ERROR_XAPIAN,
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(unsigned)-1);
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}
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const char*
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mu_store_version (MuStore *store)
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{
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g_return_val_if_fail (store, NULL);
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return store->version ();
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}
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gboolean
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mu_store_needs_upgrade (MuStore *store)
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{
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g_return_val_if_fail (store, TRUE);
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return (g_strcmp0 (mu_store_version (store),
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MU_STORE_SCHEMA_VERSION) == 0) ? FALSE : TRUE;
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}
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char*
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mu_store_get_metadata (MuStore *store, const char *key, GError **err)
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{
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g_return_val_if_fail (store, NULL);
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g_return_val_if_fail (key, NULL);
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try {
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const std::string val (store->db_read_only()->get_metadata (key));
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return val.empty() ? NULL : g_strdup (val.c_str());
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN(err, MU_ERROR_XAPIAN, NULL);
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}
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XapianDatabase*
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mu_store_get_read_only_database (MuStore *store)
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{
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g_return_val_if_fail (store, NULL);
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return (XapianWritableDatabase*)store->db_read_only();
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}
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gboolean
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mu_store_contains_message (MuStore *store, const char* path, GError **err)
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{
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g_return_val_if_fail (store, FALSE);
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g_return_val_if_fail (path, FALSE);
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try {
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const std::string term (store->get_uid_term(path));
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return store->db_read_only()->term_exists (term) ? TRUE: FALSE;
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN(err, MU_ERROR_XAPIAN, FALSE);
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}
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unsigned
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mu_store_get_docid_for_path (MuStore *store, const char* path, GError **err)
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{
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g_return_val_if_fail (store, FALSE);
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g_return_val_if_fail (path, FALSE);
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try {
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const std::string term (store->get_uid_term(path));
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Xapian::Query query (term);
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Xapian::Enquire enq (*store->db_read_only());
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enq.set_query (query);
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Xapian::MSet mset (enq.get_mset (0,1));
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if (mset.empty())
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throw MuStoreError (MU_ERROR_NO_MATCHES,
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"message not found");
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return *mset.begin();
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN(err, MU_ERROR_XAPIAN,
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MU_STORE_INVALID_DOCID);
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}
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time_t
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mu_store_get_timestamp (MuStore *store, const char* msgpath, GError **err)
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{
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char *stampstr;
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time_t rv;
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g_return_val_if_fail (store, 0);
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g_return_val_if_fail (msgpath, 0);
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stampstr = mu_store_get_metadata (store, msgpath, err);
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if (!stampstr)
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return (time_t)0;
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rv = (time_t) g_ascii_strtoull (stampstr, NULL, 10);
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g_free (stampstr);
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return rv;
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}
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MuError
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mu_store_foreach (MuStore *self,
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MuStoreForeachFunc func, void *user_data, GError **err)
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{
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g_return_val_if_fail (self, MU_ERROR);
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g_return_val_if_fail (func, MU_ERROR);
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try {
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Xapian::Enquire enq (*self->db_read_only());
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enq.set_query (Xapian::Query::MatchAll);
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enq.set_cutoff (0,0);
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Xapian::MSet matches
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(enq.get_mset (0, self->db_read_only()->get_doccount()));
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if (matches.empty())
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return MU_OK; /* database is empty */
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for (Xapian::MSet::iterator iter = matches.begin();
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iter != matches.end(); ++iter) {
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Xapian::Document doc (iter.get_document());
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const std::string path(doc.get_value(MU_MSG_FIELD_ID_PATH));
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MuError res = func (path.c_str(), user_data);
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if (res != MU_OK)
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return res;
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}
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN(err, MU_ERROR_XAPIAN,
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MU_ERROR_XAPIAN);
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return MU_OK;
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}
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MuMsg*
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mu_store_get_msg (MuStore *self, unsigned docid, GError **err)
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{
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g_return_val_if_fail (self, NULL);
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g_return_val_if_fail (docid != 0, NULL);
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try {
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Xapian::Document *doc =
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new Xapian::Document
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(self->db_read_only()->get_document (docid));
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return mu_msg_new_from_doc ((XapianDocument*)doc, err);
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} MU_XAPIAN_CATCH_BLOCK_G_ERROR_RETURN (err, MU_ERROR_XAPIAN, 0);
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}
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