Updated change log

CHANGELOG.md

@@ -0,0 +1,18 @@
+ArduinoJsonParser change log
+============================
+
+v1.2
+----
+
+* Example: changed `char[] json` into `char json[]`. Damn it C# !
+
+v1.1
+----
+
+* Example: changed `char* json` into `char[] json` so that the bytes are not write protected
+* Fixed parsing bug when the JSON contains multi-dimensional arrays
+
+v1.0 
+----
+
+Initial release

JsonArray.cpp

@@ -9,7 +9,7 @@
 JsonArray::JsonArray(char* json, jsmntok_t* tokens)
 : JsonObjectBase(json, tokens)
 {
-	if (tokens[0].type != JSMN_ARRAY)
+	if (tokens == 0 || tokens[0].type != JSMN_ARRAY)
 		makeInvalid();
 }
 

JsonHashTable.cpp

@@ -11,7 +11,7 @@
 JsonHashTable::JsonHashTable(char* json, jsmntok_t* tokens)
 : JsonObjectBase(json, tokens)
 {
-	if (tokens[0].type != JSMN_OBJECT)
+	if (tokens == 0 || tokens[0].type != JSMN_OBJECT)
 		makeInvalid();
 }
 

JsonObjectBase.cpp

@@ -10,11 +10,15 @@
 
 int JsonObjectBase::getNestedTokenCount(jsmntok_t* token)
 {
-	int count = 0;
+	int end = token->end;
+	int count = 0;	
 
-	for (int i = 0; i < token->size; i++)
+	token++;
+
+	while (token->start < end)
 	{
-		count += 1 + getNestedTokenCount(token + 1 + i);
+		token++;
+		count++;
 	}
 
 	return count;

README.md

@@ -21,7 +21,7 @@ Features
 Example
 -------
 
-    char* json = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
+    char json[] = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
 
     JsonParser<32> parser;
 
@@ -66,7 +66,7 @@ To extract data from the JSON string, you need to create a `JsonParser`, and spe
 > #### How to choose the number of tokens ?
 
 > A token is an element of the JSON object: either a key, a value, an hash-table or an array.
-> As an example the `char* json` on the top of this page contains 12 tokens (don't forget to count 1 for the whole object and 1 more for the array itself).
+> As an example the `char json[]` on the top of this page contains 12 tokens (don't forget to count 1 for the whole object and 1 more for the array itself).
 
 > The more tokens you allocate, the more complex the JSON can be, but also the more memory is occupied.
 > Each token takes 8 bytes, so `sizeof(JsonParser<32>)` is 256 bytes which is quite big in an Arduino with only 2KB of RAM.
@@ -85,7 +85,7 @@ If you need other type, you can get the string value and parse it yourself.
 
 #### Hash-table
 
-Consider we have a `char* json` pointing to the following JSON string:
+Consider we have a `char json[]` containing to the following JSON string:
 
     {
         "Name":"Blanchon",
@@ -120,7 +120,7 @@ And then extract the member you need:
     
 #### Array
 
-Consider we have a `char* json` pointing to the following JSON string:
+Consider we have a `char json[]` containing to the following JSON string:
 
     [
         [ 1.2, 3.4 ],
@@ -196,7 +196,7 @@ because the local variable `parser` will be *removed* from memory when the funct
 
 This will probably never be an issue, but you need to be aware of this feature.
 
-When you pass a `char*` to `JsonParser::parseArray()` or `JsonParser::parseHashTable()`, the content of the string will be altered to add `\0` at the end of the tokens.
+When you pass a `char[]` to `JsonParser::parseArray()` or `JsonParser::parseHashTable()`, the content of the string will be altered to add `\0` at the end of the tokens.
 
 This is because we want functions like `JsonArray::getString()` to return a null-terminating string without any memory allocation.
    
@@ -406,4 +406,11 @@ As you'll see the code size if between 1680 and 3528 bytes, depending on the fea
         <td>TOTAL</td>
         <td>710</td>
     </tr>
-</table>
+</table>
+
+
+Links
+-----
+
+* [The project for which I made me this library](http://blog.benoitblanchon.fr/rfid-payment-terminal/)
+* [Blog post on the motivation for this library](http://blog.benoitblanchon.fr/arduino-json-parser/)

examples/JsonParserExample/JsonParserExample.ino

@@ -7,7 +7,7 @@
 
 void ParseAnObject()
 {
-    char* json = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
+    char json[] = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
 
     JsonParser<32> parser;
 
@@ -47,7 +47,7 @@ void ParseAnObject()
 
 void ParseAnArray()
 {
-    char* json = "[[1.2,3.4],[5.6,7.8]]";
+    char json[] = "[[1.2,3.4],[5.6,7.8]]";
 
     JsonParser<32> parser;
 

tests/.gitignore

@@ -0,0 +1,5 @@
+/*.sdf
+/*.user
+/*.suo
+/Debug
+/ipch

tests/ArduinoJsonParserTests.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.21005.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "ArduinoJsonParserTests", "ArduinoJsonParserTests.vcxproj", "{4DD596EF-0185-4AB4-A3C2-F20C496F7806}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Release|Win32 = Release|Win32
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4DD596EF-0185-4AB4-A3C2-F20C496F7806}.Debug|Win32.ActiveCfg = Debug|Win32
+		{4DD596EF-0185-4AB4-A3C2-F20C496F7806}.Debug|Win32.Build.0 = Debug|Win32
+		{4DD596EF-0185-4AB4-A3C2-F20C496F7806}.Release|Win32.ActiveCfg = Release|Win32
+		{4DD596EF-0185-4AB4-A3C2-F20C496F7806}.Release|Win32.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

tests/ArduinoJsonParserTests.vcxproj

@@ -0,0 +1,106 @@
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+    <Link>
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+      <GenerateDebugInformation>true</GenerateDebugInformation>
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+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="..\JsonArray.h" />
+    <ClInclude Include="..\JsonHashTable.h" />
+    <ClInclude Include="..\JsonObjectBase.h" />
+    <ClInclude Include="..\JsonParser.h" />
+    <ClInclude Include="..\utility\jsmn.h" />
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+    <ClCompile Include="TestArrays.cpp" />
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+    <ClCompile Include="TestGbathreeStrings.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

tests/ArduinoJsonParserTests.vcxproj.filters

@@ -0,0 +1,60 @@
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+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\JsonArray.h">
+      <Filter>Header Files</Filter>
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+    <ClInclude Include="..\JsonHashTable.h">
+      <Filter>Header Files</Filter>
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+    <ClInclude Include="..\JsonObjectBase.h">
+      <Filter>Header Files</Filter>
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+    <ClInclude Include="..\JsonParser.h">
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+    <ClInclude Include="..\utility\jsmn.h">
+      <Filter>Header Files</Filter>
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+      <Filter>Source Files</Filter>
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+    <ClCompile Include="..\utility\jsmn.cpp">
+      <Filter>Source Files</Filter>
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+    <ClCompile Include="TestArrayExample.cpp">
+      <Filter>Source Files</Filter>
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+      <Filter>Source Files</Filter>
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tests/TestArrayExample.cpp

@@ -0,0 +1,50 @@
+#include "CppUnitTest.h"
+#include "JsonParser.h"
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace ArduinoJsonParserTests
+{
+	TEST_CLASS(TestArrayExample)
+	{
+		char json[128];
+		JsonParser<32> parser;
+		JsonArray array;
+
+	public:
+
+		TEST_METHOD_INITIALIZE(Initialize)
+		{
+			strcpy(json, "[[1.2,3.4],[5.6,7.8]]");
+			array = parser.parseArray(json);
+		}
+		
+		TEST_METHOD(Array_Success_ReturnsTrue)
+		{
+			Assert::IsTrue(array.success());
+		}
+
+		TEST_METHOD(Array_GetLength_Returns2)
+		{
+			Assert::AreEqual(2, array.getLength());
+		}
+
+		TEST_METHOD(Array_GetArray0_ReturnsInnerArray0)
+		{
+			JsonArray innerArray = array.getArray(0);
+
+			Assert::AreEqual(2, innerArray.getLength());
+			Assert::AreEqual(1.2, innerArray.getDouble(0));
+			Assert::AreEqual(3.4, innerArray.getDouble(1));
+		}
+
+		TEST_METHOD(Array_GetArray1_ReturnsInnerArray1)
+		{
+			JsonArray innerArray = array.getArray(1);
+
+			Assert::AreEqual(2, innerArray.getLength());
+			Assert::AreEqual(5.6, innerArray.getDouble(0));
+			Assert::AreEqual(7.8, innerArray.getDouble(1));
+		}
+	};
+}

tests/TestArrays.cpp

@@ -0,0 +1,141 @@
+#include "CppUnitTest.h"
+#include "JsonParser.h"
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace ArduinoJsonParserTests
+{
+	TEST_CLASS(TestArrays)
+	{
+		JsonParser<32> parser;
+
+	public:
+		
+		TEST_METHOD(EmptyString)
+		{
+			char json[] = "";
+
+			JsonArray array = parser.parseArray(json);
+			Assert::IsFalse(array.success());
+		}
+
+		TEST_METHOD(EmptyArray)
+		{
+			char json[] = "[]";
+
+			JsonArray array = parser.parseArray(json);
+			Assert::IsTrue(array.success());
+		}
+
+		TEST_METHOD(TooFewClosingBrackets)
+		{
+			char json[] = "[[]";
+
+			JsonArray array = parser.parseArray(json);
+			Assert::IsFalse(array.success());
+		}
+
+		TEST_METHOD(TooManyClosingBrackets)
+		{
+			char json[] = "[]]";
+
+			JsonArray array = parser.parseArray(json);
+			Assert::IsFalse(array.success());
+		}
+		
+		TEST_METHOD(OneDimensionArray)
+		{
+			char json [] = "[0,0]";
+
+			JsonArray array = parser.parseArray(json);
+			Assert::IsTrue(array.success());
+			Assert::AreEqual(2, array.getLength());
+
+			for (int i = 0; i < 2; i++)
+			{
+				Assert::AreEqual(0L, array.getLong(i));
+			}
+		}
+
+		TEST_METHOD(TwoDimensionsArray)
+		{
+			char json[] = "[[0,0],[0,0]]";
+
+			JsonArray array1 = parser.parseArray(json);
+			Assert::IsTrue(array1.success());
+			Assert::AreEqual(2, array1.getLength());
+
+			for (int i = 0; i < 2; i++)
+			{
+				JsonArray array2 = array1.getArray(i);
+
+				Assert::AreEqual(2, array2.getLength());
+
+				for (int j = 0; j < 2; j++)
+				{
+					Assert::AreEqual(0L, array2.getLong(j));
+				}
+			}
+		}
+
+		TEST_METHOD(TreeDimensionsArray)
+		{
+			char json[] = "[[[0,0],[0,0]],[[0,0],[0,0]]]";
+
+			JsonArray array1 = parser.parseArray(json);
+			Assert::IsTrue(array1.success());
+			Assert::AreEqual(2, array1.getLength());
+
+			for (int i = 0; i < 2; i++)
+			{
+				JsonArray array2 = array1.getArray(i);
+
+				Assert::AreEqual(2, array2.getLength());
+
+				for (int j = 0; j < 2; j++)
+				{
+					JsonArray array3 = array2.getArray(j);
+
+					Assert::AreEqual(2, array3.getLength());
+
+					for (int k = 0; k < 2; k++)
+					{
+						Assert::AreEqual(0L, array3.getLong(k));
+					}
+				}
+			}
+		}
+
+		TEST_METHOD(OneDimensionArrayInHashTable)
+		{
+			char json[] = "{a:[0,0],b:[0,0]}";
+
+			JsonHashTable root = parser.parseHashTable(json);
+			Assert::IsTrue(root.success());
+
+			JsonArray arrayA = root.getArray("a");
+			Assert::IsTrue(arrayA.success());
+			Assert::AreEqual(2, arrayA.getLength());
+
+			JsonArray arrayB = root.getArray("b");
+			Assert::IsTrue(arrayB.success());
+			Assert::AreEqual(2, arrayB.getLength());
+		}
+
+		TEST_METHOD(TwoDimensionsArrayInHashTable)
+		{
+			char json[] = "{a:[[0],[0]],b:[[0],[0]]}";
+
+			JsonHashTable root = parser.parseHashTable(json);
+			Assert::IsTrue(root.success());
+
+			JsonArray arrayA = root.getArray("a");
+			Assert::IsTrue(arrayA.success());
+			Assert::AreEqual(2, arrayA.getLength());
+
+			JsonArray arrayB = root.getArray("b");
+			Assert::IsTrue(arrayB.success());
+			Assert::AreEqual(2, arrayB.getLength());
+		}
+	};
+}

tests/TestGbathreeStrings.cpp

@@ -0,0 +1,238 @@
+#include "CppUnitTest.h"
+#include "JsonParser.h"
+#include <string>
+
+using namespace std;
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace ArduinoJsonParserTests
+{
+	TEST_CLASS(TestGbathreeSample1)
+	{
+		char json[1024];
+		JsonParser<200> parser;
+		JsonHashTable root;
+		
+
+	public:
+
+		TEST_METHOD_INITIALIZE(Initialize)
+		{
+			// BUG described here:
+			// http://forum.arduino.cc/index.php?topic=172578.msg1608219#msg1608219
+			strcpy(json, "{ \"protocol_name\":\"fluorescence\",\"repeats\":1,\"wait\":0,\"averages\":1,\"measurements\":3,\"meas2_light\":15,\"meas1_baseline\":0,\"act_light\":20,\"pulsesize\":25,\"pulsedistance\":10000,\"actintensity1\":50,\"actintensity2\":255,\"measintensity\":255,\"calintensity\":255,\"pulses\":[50,50,50],\"act\":[2,1,2,2],\"red\":[2,2,2,2],\"detectors\":[[34,34,34,34],[34,34,34,34],[34,34,34,34],[34,34,34,34]],\"alta\":[2,2,2,2],\"altb\":[2,2,2,2],\"measlights\":[[15,15,15,15],[15,15,15,15],[15,15,15,15],[15,15,15,15]],\"measlights2\":[[15,15,15,15],[15,15,15,15],[15,15,15,15],[15,15,15,15]],\"altc\":[2,2,2,2],\"altd\":[2,2,2,2]}");
+			root = parser.parseHashTable(json);
+		}
+
+		TEST_METHOD(Root)
+		{
+			Assert::IsTrue(root.success());
+		}
+
+		TEST_METHOD(ProtocolName)
+		{
+			string protocol_name = root.getString("protocol_name");
+			Assert::AreEqual(string("fluorescence"), protocol_name);
+		}
+
+		TEST_METHOD(Repeats)
+		{
+			Assert::AreEqual(1L, root.getLong("repeats"));
+		}
+
+		TEST_METHOD(Wait)
+		{
+			Assert::AreEqual(0L, root.getLong("wait"));
+		}
+
+		TEST_METHOD(Measurements)
+		{
+			Assert::AreEqual(3L, root.getLong("measurements"));
+		}
+
+		TEST_METHOD(Meas2_Light)
+		{
+			Assert::AreEqual(15L, root.getLong("meas2_light"));
+		}
+
+		TEST_METHOD(Meas1_Baseline)
+		{
+			Assert::AreEqual(0L, root.getLong("meas1_baseline"));
+		}
+
+		TEST_METHOD(Act_Light)
+		{
+			Assert::AreEqual(20L, root.getLong("act_light"));
+		}
+
+		TEST_METHOD(Pulsesize)
+		{
+			Assert::AreEqual(25L, root.getLong("pulsesize"));
+		}
+
+		TEST_METHOD(Pulsedistance)
+		{
+			Assert::AreEqual(10000L, root.getLong("pulsedistance"));
+		}
+
+		TEST_METHOD(Actintensity1)
+		{
+			Assert::AreEqual(50L, root.getLong("actintensity1"));
+		}
+				
+		TEST_METHOD(Actintensity2)
+		{
+			Assert::AreEqual(255L, root.getLong("actintensity2"));
+		}
+		
+		TEST_METHOD(Measintensity)
+		{
+			Assert::AreEqual(255L, root.getLong("measintensity"));
+		}
+		
+		TEST_METHOD(Calintensity)
+		{
+			Assert::AreEqual(255L, root.getLong("calintensity"));
+		}
+
+		TEST_METHOD(Pulses)
+		{
+			// "pulses":[50,50,50]
+
+			JsonArray array = root.getArray("pulses");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(3, array.getLength());
+
+			for (int i = 0; i < 3; i++)
+			{
+				Assert::AreEqual(50L, array.getLong(i));
+			}
+		}
+
+		TEST_METHOD(Act)
+		{
+			// "act":[2,1,2,2]
+
+			JsonArray array = root.getArray("act");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(4, array.getLength());
+			Assert::AreEqual(2L, array.getLong(0));
+			Assert::AreEqual(1L, array.getLong(1));
+			Assert::AreEqual(2L, array.getLong(2));
+			Assert::AreEqual(2L, array.getLong(3));			
+		}
+
+		TEST_METHOD(Detectors)
+		{
+			// "detectors":[[34,34,34,34],[34,34,34,34],[34,34,34,34],[34,34,34,34]]
+
+			JsonArray array = root.getArray("detectors");
+			Assert::IsTrue(array.success());
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(4, array.getArray(i).getLength());
+
+				for (int j = 0; j < 4; j++)
+					Assert::AreEqual(34L, array.getArray(i).getLong(j));
+			}
+		}
+
+		TEST_METHOD(Alta)
+		{
+			// alta:[2,2,2,2]
+
+			JsonArray array = root.getArray("alta");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(2L, array.getLong(i));
+			}
+		}
+
+		TEST_METHOD(Altb)
+		{
+			// altb:[2,2,2,2]
+
+			JsonArray array = root.getArray("altb");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(2L, array.getLong(i));
+			}
+		}
+
+		TEST_METHOD(Measlights)
+		{
+			// "measlights":[[15,15,15,15],[15,15,15,15],[15,15,15,15],[15,15,15,15]]
+
+			JsonArray array = root.getArray("measlights");
+			Assert::IsTrue(array.success());
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(4, array.getArray(i).getLength());
+
+				for (int j = 0; j < 4; j++)
+					Assert::AreEqual(15L, array.getArray(i).getLong(j));
+			}
+		}
+
+		TEST_METHOD(Measlights2)
+		{
+			// "measlights2":[[15,15,15,15],[15,15,15,15],[15,15,15,15],[15,15,15,15]]
+
+			JsonArray array = root.getArray("measlights2");
+			Assert::IsTrue(array.success());
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(4, array.getArray(i).getLength());
+
+				for (int j = 0; j < 4; j++)
+					Assert::AreEqual(15L, array.getArray(i).getLong(j));
+			}
+		}
+
+		TEST_METHOD(Altc)
+		{
+			// altc:[2,2,2,2]
+
+			JsonArray array = root.getArray("altc");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(2L, array.getLong(i));
+			}
+		}
+
+		TEST_METHOD(Altd)
+		{
+			// altd:[2,2,2,2]
+
+			JsonArray array = root.getArray("altd");
+			Assert::IsTrue(array.success());
+
+			Assert::AreEqual(4, array.getLength());
+
+			for (int i = 0; i < 4; i++)
+			{
+				Assert::AreEqual(2L, array.getLong(i));
+			}
+		}
+	};
+}

tests/TestHashTableExample.cpp

@@ -0,0 +1,61 @@
+#include "CppUnitTest.h"
+#include "JsonParser.h"
+#include <string>
+
+using namespace std;
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace ArduinoJsonParserTests
+{		
+	TEST_CLASS(TestHashTableExample)
+	{
+		char json[128];
+		JsonParser<32> parser;
+		JsonHashTable hashTable;
+
+	public:
+
+		TEST_METHOD_INITIALIZE(Initialize)
+		{
+			strcpy(json, "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}");
+			hashTable = parser.parseHashTable(json);
+		}
+						
+		TEST_METHOD(HashTable_Success_ReturnsTrue)
+		{
+			Assert::IsTrue(hashTable.success());
+		}			
+
+		TEST_METHOD(HashTable_GetString_ReturnsExpectedValue)
+		{
+			string name = hashTable.getString("Name");
+			Assert::AreEqual(name, string("Blanchon"));
+		}
+
+		TEST_METHOD(HashTable_GetArray_ReturnsExpectedValue)
+		{
+			JsonArray skills = hashTable.getArray("Skills");
+
+			string skill0 = skills.getString(0);
+			Assert::AreEqual(skill0, string("C"));
+
+			string skill1 = skills.getString(1);
+			Assert::AreEqual(skill1, string("C++"));
+
+			string skill2 = skills.getString(2);
+			Assert::AreEqual(skill2, string("C#"));
+		}
+
+		TEST_METHOD(HashTable_GetLong_ReturnsExpectedValue)
+		{
+			int age = hashTable.getLong("Age");
+			Assert::AreEqual(32, age);
+		}
+
+		TEST_METHOD(HashTable_GetBool_ReturnsExpectedValue)
+		{
+			bool online = hashTable.getBool("Online");
+			Assert::AreEqual(true, online);
+		}
+	};
+}