Added ARDUINOJSON_ENABLE_INFINITY to enable Infinity in JSON

src/ArduinoJson/Configuration.hpp

@@ -140,6 +140,11 @@
 #define ARDUINOJSON_ENABLE_NAN 1
 #endif
 
+// Support Infinity in JSON
+#ifndef ARDUINOJSON_ENABLE_INFINITY
+#define ARDUINOJSON_ENABLE_INFINITY 1
+#endif
+
 // Control the exponentiation threshold for big numbers
 // CAUTION: cannot be more that 1e9 !!!!
 #ifndef ARDUINOJSON_POSITIVE_EXPONENTIATION_THRESHOLD

src/ArduinoJson/Json/TextFormatter.hpp

@@ -54,12 +54,21 @@ class TextFormatter {
   void writeFloat(T value) {
     if (isnan(value)) return writeRaw(ARDUINOJSON_ENABLE_NAN ? "NaN" : "null");
 
+#if ARDUINOJSON_ENABLE_INFINITY
     if (value < 0.0) {
       writeRaw('-');
       value = -value;
     }
 
     if (isinf(value)) return writeRaw("Infinity");
+#else
+    if (isinf(value)) return writeRaw("null");
+
+    if (value < 0.0) {
+      writeRaw('-');
+      value = -value;
+    }
+#endif
 
     FloatParts<T> parts(value);
 

src/ArduinoJson/Namespace.hpp

@@ -10,17 +10,19 @@
 
 #define ARDUINOJSON_DO_CONCAT(A, B) A##B
 #define ARDUINOJSON_CONCAT2(A, B) ARDUINOJSON_DO_CONCAT(A, B)
+#define ARDUINOJSON_CONCAT3(A, B, C) \
+  ARDUINOJSON_CONCAT2(A, ARDUINOJSON_CONCAT2(B, C))
 #define ARDUINOJSON_CONCAT4(A, B, C, D) \
   ARDUINOJSON_CONCAT2(ARDUINOJSON_CONCAT2(A, B), ARDUINOJSON_CONCAT2(C, D))
 #define ARDUINOJSON_CONCAT8(A, B, C, D, E, F, G, H)    \
   ARDUINOJSON_CONCAT2(ARDUINOJSON_CONCAT4(A, B, C, D), \
                       ARDUINOJSON_CONCAT4(E, F, G, H))
-#define ARDUINOJSON_CONCAT9(A, B, C, D, E, F, G, H, I) \
-  ARDUINOJSON_CONCAT2(ARDUINOJSON_CONCAT4(A, B, C, D), \
-                      ARDUINOJSON_CONCAT4(E, F, G, ARDUINOJSON_CONCAT2(H, I)))
+#define ARDUINOJSON_CONCAT10(A, B, C, D, E, F, G, H, I, J) \
+  ARDUINOJSON_CONCAT8(A, B, C, D, E, F, G, ARDUINOJSON_CONCAT3(H, I, J))
 
-#define ARDUINOJSON_NAMESPACE                                                  \
-  ARDUINOJSON_CONCAT9(ArduinoJson, ARDUINOJSON_VERSION_MAJOR,                  \
-                      ARDUINOJSON_VERSION_MINOR, ARDUINOJSON_VERSION_REVISION, \
-                      _, ARDUINOJSON_USE_LONG_LONG, ARDUINOJSON_USE_DOUBLE,    \
-                      ARDUINOJSON_DECODE_UNICODE, ARDUINOJSON_ENABLE_NAN)
+#define ARDUINOJSON_NAMESPACE                                            \
+  ARDUINOJSON_CONCAT10(                                                  \
+      ArduinoJson, ARDUINOJSON_VERSION_MAJOR, ARDUINOJSON_VERSION_MINOR, \
+      ARDUINOJSON_VERSION_REVISION, _, ARDUINOJSON_USE_LONG_LONG,        \
+      ARDUINOJSON_USE_DOUBLE, ARDUINOJSON_DECODE_UNICODE,                \
+      ARDUINOJSON_ENABLE_NAN, ARDUINOJSON_ENABLE_INFINITY)

src/ArduinoJson/Numbers/parseNumber.hpp

@@ -71,11 +71,16 @@ inline ParsedNumber<TFloat, TUInt> parseNumber(const char *s) {
       s++;
       break;
   }
+
 #if ARDUINOJSON_ENABLE_NAN
   if (*s == 'n' || *s == 'N') return traits::nan();
 #endif
+
+#if ARDUINOJSON_ENABLE_INFINITY
   if (*s == 'i' || *s == 'I')
     return is_negative ? -traits::inf() : traits::inf();
+#endif
+
   if (!isdigit(*s) && *s != '.') return return_type();
 
   mantissa_t mantissa = 0;