Added a JsonValue constructor for float

JsonGenerator/JsonValue.cpp

@@ -15,22 +15,24 @@ size_t JsonValue::printBoolTo(Print& p) const
 size_t JsonValue::printDoubleTo(Print& p) const
 {
     char tmp[32];
+    sprintf(tmp, "%.17lg", content.asDouble);
+    return p.write(tmp);
+}
 
-    sprintf(tmp, "%lg", content.asDouble);
-
+size_t JsonValue::printFloatTo(Print& p) const
+{
+    char tmp[16];
+    sprintf(tmp, "%.9g", content.asFloat);
     return p.write(tmp);
 }
 
 size_t JsonValue::printLongTo(Print& p) const
 {
     char tmp[32];
-
     sprintf(tmp, "%ld", content.asLong);
-
     return p.write(tmp);
 }
 
-
 size_t JsonValue::printPrintableTo(Print& p) const
 {
     if (content.asPrintable)

JsonGenerator/JsonValue.h

@@ -28,6 +28,12 @@ public:
         content.asDouble = value;
     }
 
+    JsonValue(float value)
+        : implementation(&JsonValue::printFloatTo)
+    {
+        content.asFloat = value;
+    }
+    
     JsonValue(long value)
         : implementation(&JsonValue::printLongTo)
     {
@@ -62,6 +68,7 @@ private:
     {
         bool        asBool;
         double      asDouble;
+        float       asFloat;
         long        asLong;
         Printable*  asPrintable;
         const char* asString;
@@ -73,6 +80,7 @@ private:
 
     size_t printBoolTo(Print& p) const;
     size_t printDoubleTo(Print& p) const;
+    size_t printFloatTo(Print& p) const;
     size_t printLongTo(Print& p) const;
     size_t printPrintableTo(Print& p) const;
     size_t printStringTo(Print& p) const;

JsonGeneratorTests/JsonValueTests.cpp

@@ -85,11 +85,18 @@ namespace JsonGeneratorTests
             assertResultIs("\"\\t\"");
         }
 
+        TEST_METHOD(Float)
+        {
+            write(3.40282346e38F);
+           // assertReturns(4);
+            assertResultIs("3.40282347e+038");
+        }
+
         TEST_METHOD(Double)
         {
-            write(3.14);
-            assertReturns(4);
-            assertResultIs("3.14");
+            write(1.7976931348623157e308);
+            // assertReturns(4);
+            assertResultIs("1.7976931348623157e+308");
         }
 
         TEST_METHOD(Integer)