shared: add minimal JSON tokenizer

[elogind.git] / src / shared / json.h

diff --git a/src/shared/json.h b/src/shared/json.h
new file mode 100644 (file)
index 0000000..a845713
--- /dev/null
+++ b/src/shared/json.h
@@ -0,0 +1,50 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <inttypes.h>
+
+enum {
+        JSON_END,
+        JSON_COLON,
+        JSON_COMMA,
+        JSON_OBJECT_OPEN,
+        JSON_OBJECT_CLOSE,
+        JSON_ARRAY_OPEN,
+        JSON_ARRAY_CLOSE,
+        JSON_STRING,
+        JSON_REAL,
+        JSON_INTEGER,
+        JSON_BOOLEAN,
+        JSON_NULL,
+};
+
+union json_value {
+        bool boolean;
+        double real;
+        intmax_t integer;
+};
+
+#define JSON_VALUE_NULL ((union json_value) {})
+
+int json_tokenize(const char **p, char **ret_string, union json_value *ret_value, void **state, unsigned *line);