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json.h

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+/*
+ * Pseudo JSON parser
+ * 
+ * Copyright (c) 2017 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef JSON_H
+#define JSON_H
+
+typedef enum {
+    JSON_STR,
+    JSON_INT,
+    JSON_OBJ,
+    JSON_ARRAY,
+    JSON_BOOL,
+    JSON_NULL,
+    JSON_UNDEFINED,
+    JSON_EXCEPTION,
+} JSONTypeEnum;
+
+typedef struct {
+    int len;
+    char data[0];
+} JSONString;
+
+typedef struct JSONValue {
+    JSONTypeEnum type;
+    union {
+        JSONString *str;
+        int int32;
+        BOOL b;
+        struct JSONObject *obj;
+        struct JSONArray *array;
+    } u;
+} JSONValue;
+
+typedef struct JSONProperty {
+    JSONValue name;
+    JSONValue value;
+} JSONProperty;
+
+typedef struct JSONObject {
+    int len;
+    int size;
+    JSONProperty *props;
+} JSONObject;
+
+typedef struct JSONArray {
+    int len;
+    int size;
+    JSONValue *tab;
+} JSONArray;
+
+JSONValue json_string_new2(const char *str, int len);
+JSONValue json_string_new(const char *str);
+JSONValue __attribute__((format(printf, 1, 2))) json_error_new(const char *fmt, ...);
+void json_free(JSONValue val);
+
+JSONValue json_object_new(void);
+JSONValue json_object_get(JSONValue val, const char *name);
+int json_object_set(JSONValue val, const char *name, JSONValue prop_val);
+
+JSONValue json_array_new(void);
+JSONValue json_array_get(JSONValue val, unsigned int idx);
+int json_array_set(JSONValue val, unsigned int idx, JSONValue prop_val);
+
+static inline BOOL json_is_error(JSONValue val)
+{
+    return val.type == JSON_EXCEPTION;
+}
+
+static inline BOOL json_is_undefined(JSONValue val)
+{
+    return val.type == JSON_UNDEFINED;
+}
+
+static inline JSONValue json_undefined_new(void)
+{
+    JSONValue val;
+    val.type = JSON_UNDEFINED;
+    val.u.int32 = 0;
+    return val;
+}
+
+static inline JSONValue json_null_new(void)
+{
+    JSONValue val;
+    val.type = JSON_NULL;
+    val.u.int32 = 0;
+    return val;
+}
+
+static inline JSONValue json_int32_new(int v)
+{
+    JSONValue val;
+    val.type = JSON_INT;
+    val.u.int32 = v;
+    return val;
+}
+
+static inline JSONValue json_bool_new(BOOL v)
+{
+    JSONValue val;
+    val.type = JSON_BOOL;
+    val.u.b = v;
+    return val;
+}
+
+const char *json_get_str(JSONValue val);
+const char *json_get_error(JSONValue val);
+
+JSONValue json_parse_value(const char *p);
+JSONValue json_parse_value_len(const char *p, int len);
+
+#endif /* JSON_H */