new dtoa algorithm

Author: ibireme

src/dtoa/dtoa_dragonbox.cpp

@@ -1,14 +1,27 @@
 /*
  Code from https://github.com/jk-jeon/dragonbox
+ 
+ This is the dragonbox algorithm author's code.
+ But the output is always in scientific notation.
  */
-#include <stdio.h>
 #include "dragonbox/dragonbox_to_chars.h"
-
 extern "C" {
-
-char *dtoa_dragonbox(double val, char *buf) {
+char *dtoa_dragonbox_jk(double val, char *buf) {
     return jkj::dragonbox::to_chars(val, buf); // null-terminate
     // return jkj::dragonbox::to_chars_n(val, buf); // no null-terminate
 }
+}
+
+
 
+/*
+ Code from https://github.com/abolz/Drachennest
+ */
+#include "dragonbox.h"
+extern "C" {
+char *dtoa_dragonbox(double val, char *buf) {
+    buf = dragonbox::Dtoa(buf, val); // need 64 bytes
+    *buf = '\0';
+    return buf;
+}
 }