Remove on_{begin,end}_{string,number}

And add `done` arg to data callback

include/weaseljson.h

@@ -6,23 +6,20 @@ extern "C" {
 #endif
 
 struct WeaselJsonCallbacks {
-  void (*on_begin_object)(void *data);
-  void (*on_end_object)(void *data);
-  void (*on_begin_string)(void *data);
-  /** May be called multiple times per string if not all string data is
-   * available yet. The string data provided is unescaped. */
-  void (*on_string_data)(void *data, const char *buf, int len);
-  void (*on_end_string)(void *data);
-  void (*on_begin_array)(void *data);
-  void (*on_end_array)(void *data);
-  void (*on_begin_number)(void *data);
-  /** May be called multiple times per number if not all number data is
-   * available yet */
-  void (*on_number_data)(void *data, const char *buf, int len);
-  void (*on_end_number)(void *data);
-  void (*on_true_literal)(void *data);
-  void (*on_false_literal)(void *data);
-  void (*on_null_literal)(void *data);
+  void (*on_begin_object)(void *userdata);
+  void (*on_end_object)(void *userdata);
+  /** The string data provided has already been unescaped. If `done` is false,
+   * this string may be incomplete and there will be another call with more data
+   */
+  void (*on_string_data)(void *userdata, const char *buf, int len, int done);
+  void (*on_begin_array)(void *userdata);
+  void (*on_end_array)(void *userdata);
+  /*If `done` is false, this number may be incomplete and there will be another
+   * call with more data*/
+  void (*on_number_data)(void *userdata, const char *buf, int len, int done);
+  void (*on_true_literal)(void *userdata);
+  void (*on_false_literal)(void *userdata);
+  void (*on_null_literal)(void *userdata);
 };
 
 enum WeaselJsonStatus {
@@ -40,12 +37,12 @@ enum WeaselJsonStatus {
 typedef struct WeaselJsonParser WeaselJsonParser;
 
 /** Create a parser. Increasing stack size increases memory usage but also
- * increases the depth of nested json accepted. `callbacks` and `data` must
+ * increases the depth of nested json accepted. `callbacks` and `userdata` must
  * outlive the returned parser. Returns null if there's insufficient available
  * memory */
 WeaselJsonParser *WeaselJsonParser_create(int stackSize,
                                           const WeaselJsonCallbacks *callbacks,
-                                          void *data);
+                                          void *userdata);
 
 /** Restore the parser to its newly-created state */
 void WeaselJsonParser_reset(WeaselJsonParser *parser);