From efa55eb5b3d3a4942789bdf397c3a6d6226475d4 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Mon, 7 Sep 2020 12:57:22 +0200
Subject: Revert "remove external libraries from main branch"

This reverts commit 0558244645611f314f47e0fa427f7323ce253eaf.
---
 include/lib/ArduinoJson/Polyfills/isInteger.hpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 include/lib/ArduinoJson/Polyfills/isInteger.hpp

(limited to 'include/lib/ArduinoJson/Polyfills/isInteger.hpp')

diff --git a/include/lib/ArduinoJson/Polyfills/isInteger.hpp b/include/lib/ArduinoJson/Polyfills/isInteger.hpp
new file mode 100644
index 0000000..8049079
--- /dev/null
+++ b/include/lib/ArduinoJson/Polyfills/isInteger.hpp
@@ -0,0 +1,19 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "./ctype.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+inline bool isInteger(const char* s) {
+  if (!s || !*s) return false;
+  if (issign(*s)) s++;
+  while (isdigit(*s)) s++;
+  return *s == '\0';
+}
+}  // namespace Internals
+}  // namespace ArduinoJson
-- 
cgit v1.2.3