lib: factor out lastmod range handling from sexp parser.

[notmuch] / lib / lastmod-fp.cc

diff --git a/lib/lastmod-fp.cc b/lib/lastmod-fp.cc
new file mode 100644 (file)
index 0000000..5fdaf28
--- /dev/null
+++ b/lib/lastmod-fp.cc
@@ -0,0 +1,68 @@
+/* lastmod-fp.cc - lastmod range query glue
+ *
+ * This file is part of notmuch.
+ *
+ * Copyright © 2022 David Bremner
+ *
+ * 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: David Bremner <david@tethera.net>
+ */
+
+#include "database-private.h"
+
+notmuch_status_t
+_notmuch_lastmod_strings_to_query (notmuch_database_t *notmuch,
+                                  const std::string &from, const std::string &to,
+                                  Xapian::Query &output, std::string &msg)
+{
+    long from_idx = 0L, to_idx = LONG_MAX;
+    long current;
+    std::string str;
+
+    /* revision should not change, but for the avoidance of doubt,
+     * grab for both ends of range, if needed*/
+    current = notmuch_database_get_revision (notmuch, NULL);
+
+    try {
+       if (from.empty ())
+           from_idx = 0L;
+       else
+           from_idx = std::stol (from);
+    } catch (std::logic_error &e) {
+       msg = "bad 'from' revision: '" + from + "'";
+       return NOTMUCH_STATUS_BAD_QUERY_SYNTAX;
+    }
+
+    if (from_idx < 0)
+       from_idx += current;
+
+    try {
+       if (EMPTY_STRING (to))
+           to_idx = LONG_MAX;
+       else
+           to_idx = std::stol (to);
+    } catch (std::logic_error &e) {
+       msg = "bad 'to' revision: '" + to + "'";
+       return NOTMUCH_STATUS_BAD_QUERY_SYNTAX;
+    }
+
+    if (to_idx < 0)
+       to_idx += current;
+
+    output = Xapian::Query (Xapian::Query::OP_VALUE_RANGE, NOTMUCH_VALUE_LAST_MOD,
+                           Xapian::sortable_serialise (from_idx),
+                           Xapian::sortable_serialise (to_idx));
+    return NOTMUCH_STATUS_SUCCESS;
+}