added scr_lvled, a bunch of libraries, and improved framework code

[raydungeon] / libs / goat3d / src / json.h

diff --git a/libs/goat3d/src/json.h b/libs/goat3d/src/json.h
new file mode 100644 (file)
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_ */