lib: add sexp: prefix to Xapian (infix) query parser.

This is analogous to the "infix" prefix provided by the s-expression
based query parser.

4 files changed, 88 insertions, 1 deletions

diff --git a/lib/Makefile.local b/lib/Makefile.local
index 1378a74b..6d67a2a4 100644
--- a/lib/Makefile.local
+++ b/lib/Makefile.local
@@ -64,7 +64,8 @@ libnotmuch_cxx_srcs =		\
 	$(dir)/prefix.cc	\
 	$(dir)/open.cc		\
 	$(dir)/init.cc		\
-	$(dir)/parse-sexp.cc
+	$(dir)/parse-sexp.cc	\
+	$(dir)/sexp-fp.cc
 
 libnotmuch_modules := $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)
 
diff --git a/lib/prefix.cc b/lib/prefix.cc
index 857c05b9..06e2333a 100644
--- a/lib/prefix.cc
+++ b/lib/prefix.cc
@@ -3,6 +3,7 @@
 #include "thread-fp.h"
 #include "regexp-fields.h"
 #include "parse-time-vrp.h"
+#include "sexp-fp.h"
 
 typedef struct {
     const char *name;
@@ -60,6 +61,8 @@ prefix_t prefix_table[] = {
       NOTMUCH_FIELD_PROCESSOR },
     { "query",                  NULL,           NOTMUCH_FIELD_EXTERNAL |
       NOTMUCH_FIELD_PROCESSOR },
+    { "sexp",                  NULL,            NOTMUCH_FIELD_EXTERNAL |
+      NOTMUCH_FIELD_PROCESSOR },
     { "from",                   "XFROM",        NOTMUCH_FIELD_EXTERNAL |
       NOTMUCH_FIELD_PROBABILISTIC |
       NOTMUCH_FIELD_PROCESSOR },
@@ -138,6 +141,8 @@ _setup_query_field (const prefix_t *prefix, notmuch_database_t *notmuch)
 	    fp = (new QueryFieldProcessor (*notmuch->query_parser, notmuch))->release ();
 	else if (STRNCMP_LITERAL (prefix->name, "thread") == 0)
 	    fp = (new ThreadFieldProcessor (*notmuch->query_parser, notmuch))->release ();
+	else if (STRNCMP_LITERAL (prefix->name, "sexp") == 0)
+	    fp = (new SexpFieldProcessor (notmuch))->release ();
 	else
 	    fp = (new RegexpFieldProcessor (prefix->name, prefix->flags,
 					    *notmuch->query_parser, notmuch))->release ();
diff --git a/lib/sexp-fp.cc b/lib/sexp-fp.cc
new file mode 100644
index 00000000..ed26f6ec
--- /dev/null
+++ b/lib/sexp-fp.cc
@@ -0,0 +1,40 @@
+/* sexp-fp.cc - "sexp:" field processor 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"
+#include "sexp-fp.h"
+#include <iostream>
+
+Xapian::Query
+SexpFieldProcessor::operator() (const std::string & query_string)
+{
+    notmuch_status_t status;
+    Xapian::Query output;
+
+    status = _notmuch_sexp_string_to_xapian_query (notmuch, query_string.c_str (), output);
+    if (status) {
+	throw Xapian::QueryParserError ("error parsing " + query_string);
+    }
+
+    return output;
+
+}
diff --git a/lib/sexp-fp.h b/lib/sexp-fp.h
new file mode 100644
index 00000000..341dfa7e
--- /dev/null
+++ b/lib/sexp-fp.h
@@ -0,0 +1,41 @@
+/* sexp-fp.h - sexp field processor 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>
+ */
+
+#ifndef NOTMUCH_SEXP_FP_H
+#define NOTMUCH_SEXP_FP_H
+
+#include <xapian.h>
+#include "notmuch.h"
+
+class SexpFieldProcessor : public Xapian::FieldProcessor {
+protected:
+    notmuch_database_t *notmuch;
+
+public:
+    SexpFieldProcessor (notmuch_database_t *notmuch_) : notmuch (notmuch_)
+    {
+    };
+
+    Xapian::Query operator() (const std::string & query_string);
+};
+
+#endif /* NOTMUCH_SEXP_FP_H */