Revert "remove external libraries from main branch"protocol-modeling

This reverts commit 0558244645611f314f47e0fa427f7323ce253eaf.

1 files changed, 38 insertions, 0 deletions

diff --git a/include/lib/ArduinoJson/Polyfills/isFloat.hpp b/include/lib/ArduinoJson/Polyfills/isFloat.hpp
new file mode 100644
index 0000000..973b89f
--- /dev/null
+++ b/include/lib/ArduinoJson/Polyfills/isFloat.hpp
@@ -0,0 +1,38 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include <string.h>  // for strcmp
+#include "./ctype.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+inline bool isFloat(const char* s) {
+  if (!s) return false;
+
+  if (!strcmp(s, "NaN")) return true;
+  if (issign(*s)) s++;
+  if (!strcmp(s, "Infinity")) return true;
+  if (*s == '\0') return false;
+
+  while (isdigit(*s)) s++;
+
+  if (*s == '.') {
+    s++;
+    while (isdigit(*s)) s++;
+  }
+
+  if (*s == 'e' || *s == 'E') {
+    s++;
+    if (issign(*s)) s++;
+    if (!isdigit(*s)) return false;
+    while (isdigit(*s)) s++;
+  }
+
+  return *s == '\0';
+}
+}
+}