shared: add minimal JSON tokenizer

2014-12-15 22:27:15 +01:00
parent c532d8a00c
commit e7eebcfc42
8 changed files with 595 additions and 25 deletions
@@ -0,0 +1,101 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  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 "log.h"
+#include "util.h"
+#include "json.h"
+
+static void test_one(const char *data, ...) {
+        void *state = NULL;
+        va_list ap;
+
+        va_start(ap, data);
+
+        for (;;) {
+                _cleanup_free_ char *str = NULL;
+                union json_value v = {};
+                int t, tt;
+
+                t = json_tokenize(&data, &str, &v, &state, NULL);
+                tt = va_arg(ap, int);
+
+                assert_se(t == tt);
+
+                if (t == JSON_END || t < 0)
+                        break;
+
+                else if (t == JSON_STRING) {
+                        const char *nn;
+
+                        nn = va_arg(ap, const char *);
+                        assert_se(streq_ptr(nn, str));
+
+                } else if (t == JSON_REAL) {
+                        double d;
+
+                        d = va_arg(ap, double);
+                        assert_se(abs(d - v.real) < 0.001);
+
+                } else if (t == JSON_INTEGER) {
+                        intmax_t i;
+
+                        i = va_arg(ap, intmax_t);
+                        assert_se(i == v.integer);
+
+                } else if (t == JSON_BOOLEAN) {
+                        bool b;
+
+                        b = va_arg(ap, int);
+                        assert_se(b == v.boolean);
+                }
+        }
+
+        va_end(ap);
+}
+
+int main(int argc, char *argv[]) {
+
+        test_one("x", -EINVAL);
+        test_one("", JSON_END);
+        test_one(" ", JSON_END);
+        test_one("0", JSON_INTEGER, (intmax_t) 0, JSON_END);
+        test_one("1234", JSON_INTEGER, (intmax_t) 1234, JSON_END);
+        test_one("3.141", JSON_REAL, 3.141, JSON_END);
+        test_one("0.0", JSON_REAL, 0.0, JSON_END);
+        test_one("7e3", JSON_REAL, 7e3, JSON_END);
+        test_one("-7e-3", JSON_REAL, -7e-3, JSON_END);
+        test_one("true", JSON_BOOLEAN, true, JSON_END);
+        test_one("false", JSON_BOOLEAN, false, JSON_END);
+        test_one("null", JSON_NULL, JSON_END);
+        test_one("{}", JSON_OBJECT_OPEN, JSON_OBJECT_CLOSE, JSON_END);
+        test_one("\t {\n} \n", JSON_OBJECT_OPEN, JSON_OBJECT_CLOSE, JSON_END);
+        test_one("[]", JSON_ARRAY_OPEN, JSON_ARRAY_CLOSE, JSON_END);
+        test_one("\t [] \n\n", JSON_ARRAY_OPEN, JSON_ARRAY_CLOSE, JSON_END);
+        test_one("\"\"", JSON_STRING, "", JSON_END);
+        test_one("\"foo\"", JSON_STRING, "foo", JSON_END);
+        test_one("\"foo\\nfoo\"", JSON_STRING, "foo\nfoo", JSON_END);
+        test_one("{\"foo\" : \"bar\"}", JSON_OBJECT_OPEN, JSON_STRING, "foo", JSON_COLON, JSON_STRING, "bar", JSON_OBJECT_CLOSE, JSON_END);
+        test_one("{\"foo\" : [true, false]}", JSON_OBJECT_OPEN, JSON_STRING, "foo", JSON_COLON, JSON_ARRAY_OPEN, JSON_BOOLEAN, true, JSON_COMMA, JSON_BOOLEAN, false, JSON_ARRAY_CLOSE, JSON_OBJECT_CLOSE, JSON_END);
+        test_one("\"\xef\xbf\xbd\"", JSON_STRING, "\xef\xbf\xbd", JSON_END);
+        test_one("\"\\ufffd\"", JSON_STRING, "\xef\xbf\xbd", JSON_END);
+
+        return 0;
+}