X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=libs%2Fgoat3d%2Fsrc%2Fjson.h;fp=libs%2Fgoat3d%2Fsrc%2Fjson.h;h=705a82c452443600f1548a87f00cee8d7693c53f;hb=d5f45e3128c537f272615cf76242e1dfebccdee7;hp=0000000000000000000000000000000000000000;hpb=dd7ce87b0ad2b8a1b4758bcc9354e993b71c8599;p=raydungeon

diff --git a/libs/goat3d/src/json.h b/libs/goat3d/src/json.h
new file mode 100644
index 0000000..705a82c
--- /dev/null
+++ b/libs/goat3d/src/json.h
@@ -0,0 +1,105 @@
+#ifndef JSON_H_
+#define JSON_H_
+
+enum {
+	JSON_NULL,
+	JSON_STR,	/* "foo" */
+	JSON_NUM,	/* 3.141 */
+	JSON_BOOL,	/* true */
+	JSON_OBJ,	/* { ... } */
+	JSON_ARR	/* [ ... ] */
+};
+
+struct json_value;
+
+/* objects are collections of items { "foo": 1, "bar": 2 } */
+struct json_obj {
+	struct json_item *items;
+	int num_items, max_items;
+};
+
+/* arrays are collections of values [ "foo", "bar", 3.14, false, "xyzzy" ] */
+struct json_arr {
+	struct json_value *val;
+	int size, maxsize;
+};
+
+struct json_value {
+	int type;
+
+	char *str;				/* JSON_STR */
+	double num;				/* JSON_NUM */
+	int boolean;			/* JSON_BOOL */
+	struct json_obj obj;	/* JSON_OBJ */
+	struct json_arr arr;	/* JSON_ARR */
+};
+
+/* items are key-value pairs "foo": "xyzzy" */
+struct json_item {
+	char *name;
+	struct json_value val;
+
+	struct json_item *next;
+};
+
+
+struct json_obj *json_alloc_obj(void);		/* malloc + json_init_obj */
+void json_free_obj(struct json_obj *obj);	/* json_destroy_obj + free */
+void json_init_obj(struct json_obj *obj);
+void json_destroy_obj(struct json_obj *obj);
+
+struct json_arr *json_alloc_arr(void);		/* malloc + json_init_arr */
+void json_free_arr(struct json_arr *arr);	/* json_destroy_arr + free */
+void json_init_arr(struct json_arr *arr);
+void json_destroy_arr(struct json_arr *arr);
+
+/* initialize item */
+int json_item(struct json_item *item, const char *name);
+void json_destroy_item(struct json_item *item);
+
+/* pointer values for str, obj, arr can be null */
+int json_value_str(struct json_value *jv, const char *str);
+void json_value_num(struct json_value *jv, double num);
+void json_value_bool(struct json_value *jv, int bval);
+void json_value_obj(struct json_value *jv, struct json_obj *obj);	/* shallow copy obj */
+void json_value_arr(struct json_value *jv, struct json_arr *arr);	/* shallow copy arr */
+
+void json_destroy_value(struct json_value *jv);
+
+/* item can be null, in which case only space is allocated
+ * if not null, contents are shallow-copied (moved), do not destroy or use
+ */
+int json_obj_append(struct json_obj *obj, const struct json_item *item);
+
+/* val can be null in which case only space is allocated
+ * if not null, contents are shallow-copied (moved), do not destroy or use
+ */
+int json_arr_append(struct json_arr *arr, const struct json_value *val);
+
+/* find named item in an object (direct descendant name only, not a path) */
+struct json_item *json_find_item(const struct json_obj *obj, const char *name);
+
+/* json_lookup returns 0 if the requested value is not found */
+struct json_value *json_lookup(struct json_obj *root, const char *path);
+
+/* typed lookup functions return their default argument if the requested value
+ * is not found, or if it has the wrong type.
+ */
+const char *json_lookup_str(struct json_obj *obj, const char *path, const char *def);
+double json_lookup_num(struct json_obj *obj, const char *path, double def);
+int json_lookup_bool(struct json_obj *obj, const char *path, int def);
+/* these next two are probably not very useful */
+struct json_obj *json_lookup_obj(struct json_obj *obj, const char *path, struct json_obj *def);
+struct json_arr *json_lookup_arr(struct json_obj *obj, const char *path, struct json_arr *def);
+
+
+int json_parse(struct json_obj *root, const char *text);
+
+/* mostly useful for debugging */
+void json_print(FILE *fp, struct json_obj *root);
+void json_print_obj(FILE *fp, struct json_obj *obj, int ind);
+void json_print_arr(FILE *fp, struct json_arr *arr, int ind);
+void json_print_item(FILE *fp, struct json_item *item, int ind);
+void json_print_value(FILE *fp, struct json_value *val, int ind);
+
+#endif	/* JSON_H_ */