Added an printTo(char[N]) and prettyPrintTo(char[N]) (issue #292)

CHANGELOG.md

@@ -4,6 +4,7 @@ ArduinoJson: change log
 HEAD
 ----
 
+* Added an `printTo(char[N])` and `prettyPrintTo(char[N])` (issue #292)
 * Added ability to set a nested value like this: `root["A"]["B"] = "C"` (issue #352)
 * Renamed `*.ipp` to `*Impl.hpp` because they were ignored by Arduino IDE (issue #396)
 

include/ArduinoJson/Internals/JsonPrintable.hpp

@@ -50,6 +50,11 @@ class JsonPrintable {
     return printTo(sb);
   }
 
+  template <size_t N>
+  size_t printTo(char (&buffer)[N]) const {
+    return printTo(buffer, N);
+  }
+
   template <typename TString>
   typename TypeTraits::EnableIf<StringFuncs<TString>::has_append, size_t>::type
   printTo(TString &str) const {
@@ -67,6 +72,11 @@ class JsonPrintable {
     return prettyPrintTo(sb);
   }
 
+  template <size_t N>
+  size_t prettyPrintTo(char (&buffer)[N]) const {
+    return prettyPrintTo(buffer, N);
+  }
+
   size_t prettyPrintTo(Print &print) const {
     IndentedPrint indentedPrint = IndentedPrint(print);
     return prettyPrintTo(indentedPrint);

test/JsonArray_PrettyPrintTo_Tests.cpp

@@ -5,8 +5,8 @@
 // https://github.com/bblanchon/ArduinoJson
 // If you like this project, please add a star!
 
-#include <gtest/gtest.h>
 #include <ArduinoJson.h>
+#include <gtest/gtest.h>
 
 class JsonArray_PrettyPrintTo_Tests : public testing::Test {
  public:
@@ -19,7 +19,7 @@ class JsonArray_PrettyPrintTo_Tests : public testing::Test {
   void outputMustBe(const char* expected) {
     char actual[256];
 
-    size_t actualLen = array.prettyPrintTo(actual, sizeof(actual));
+    size_t actualLen = array.prettyPrintTo(actual);
     size_t measuredLen = array.measurePrettyLength();
 
     EXPECT_STREQ(expected, actual);
@@ -28,7 +28,9 @@ class JsonArray_PrettyPrintTo_Tests : public testing::Test {
   }
 };
 
-TEST_F(JsonArray_PrettyPrintTo_Tests, Empty) { outputMustBe("[]"); }
+TEST_F(JsonArray_PrettyPrintTo_Tests, Empty) {
+  outputMustBe("[]");
+}
 
 TEST_F(JsonArray_PrettyPrintTo_Tests, OneElement) {
   array.add(1);

test/JsonArray_PrintTo_Tests.cpp

@@ -5,8 +5,8 @@
 // https://github.com/bblanchon/ArduinoJson
 // If you like this project, please add a star!
 
-#include <gtest/gtest.h>
 #include <ArduinoJson.h>
+#include <gtest/gtest.h>
 
 class JsonArray_PrintTo_Tests : public testing::Test {
  public:
@@ -17,7 +17,7 @@ class JsonArray_PrintTo_Tests : public testing::Test {
   JsonArray &array;
 
   void outputMustBe(const char *expected) {
-    size_t actualLen = array.printTo(buffer, sizeof(buffer));
+    size_t actualLen = array.printTo(buffer);
     size_t measuredLen = array.measureLength();
 
     EXPECT_STREQ(expected, buffer);
@@ -29,7 +29,9 @@ class JsonArray_PrintTo_Tests : public testing::Test {
   char buffer[256];
 };
 
-TEST_F(JsonArray_PrintTo_Tests, Empty) { outputMustBe("[]"); }
+TEST_F(JsonArray_PrintTo_Tests, Empty) {
+  outputMustBe("[]");
+}
 
 TEST_F(JsonArray_PrintTo_Tests, Null) {
   array.add(static_cast<char *>(0));

test/JsonObject_PrettyPrintTo_Tests.cpp

@@ -5,8 +5,8 @@
 // https://github.com/bblanchon/ArduinoJson
 // If you like this project, please add a star!
 
-#include <gtest/gtest.h>
 #include <ArduinoJson.h>
+#include <gtest/gtest.h>
 
 class JsonObject_PrettyPrintTo_Tests : public testing::Test {
  public:
@@ -19,7 +19,7 @@ class JsonObject_PrettyPrintTo_Tests : public testing::Test {
   void outputMustBe(const char *expected) {
     char buffer[256];
 
-    size_t actualLen = _object.prettyPrintTo(buffer, sizeof(buffer));
+    size_t actualLen = _object.prettyPrintTo(buffer);
     size_t measuredLen = _object.measurePrettyLength();
 
     EXPECT_STREQ(expected, buffer);
@@ -28,7 +28,9 @@ class JsonObject_PrettyPrintTo_Tests : public testing::Test {
   }
 };
 
-TEST_F(JsonObject_PrettyPrintTo_Tests, EmptyObject) { outputMustBe("{}"); }
+TEST_F(JsonObject_PrettyPrintTo_Tests, EmptyObject) {
+  outputMustBe("{}");
+}
 
 TEST_F(JsonObject_PrettyPrintTo_Tests, OneMember) {
   _object["key"] = "value";

test/JsonObject_PrintTo_Tests.cpp

@@ -15,7 +15,7 @@ class JsonObject_PrintTo_Tests : public testing::Test {
  protected:
   void outputMustBe(const char *expected) {
     char actual[256];
-    size_t actualLen = _object.printTo(actual, sizeof(actual));
+    size_t actualLen = _object.printTo(actual);
     size_t measuredLen = _object.measureLength();
 
     EXPECT_STREQ(expected, actual);
@@ -27,7 +27,9 @@ class JsonObject_PrintTo_Tests : public testing::Test {
   JsonObject &_object;
 };
 
-TEST_F(JsonObject_PrintTo_Tests, EmptyObject) { outputMustBe("{}"); }
+TEST_F(JsonObject_PrintTo_Tests, EmptyObject) {
+  outputMustBe("{}");
+}
 
 TEST_F(JsonObject_PrintTo_Tests, TwoStrings) {
   _object["key1"] = "value1";

test/JsonObject_Subscript_Tests.cpp

@@ -5,8 +5,8 @@
 // https://github.com/bblanchon/ArduinoJson
 // If you like this project, please add a star!
 
-#include <gtest/gtest.h>
 #include <ArduinoJson.h>
+#include <gtest/gtest.h>
 
 class JsonObject_Subscript_Tests : public ::testing::Test {
  public: