diff --git a/src/app/test/genblend.h b/src/app/test/genblend.h
index f5be442..15da545 100644
--- a/src/app/test/genblend.h
+++ b/src/app/test/genblend.h
@@ -5,8 +5,8 @@
 // Zlib - See LICENSE.md file in the package.
 
 // [Guard]
-#ifndef _GENBLEND_H
-#define _GENBLEND_H
+#ifndef _APP_TEST_GENBLEND_H
+#define _APP_TEST_GENBLEND_H
 
 // [Dependencies]
 #include <asmjit/asmjit.h>
@@ -175,4 +175,4 @@ static void blend(asmjit::host::Compiler& c) {
 } // asmgen namespace
 
 // [Guard]
-#endif // _GENBLEND_H
+#endif // _APP_TEST_GENBLEND_H
diff --git a/src/app/test/genopcode.h b/src/app/test/genopcode.h
index 7ae4b0b..b07cd38 100644
--- a/src/app/test/genopcode.h
+++ b/src/app/test/genopcode.h
@@ -5,8 +5,8 @@
 // Zlib - See LICENSE.md file in the package.
 
 // [Guard]
-#ifndef _GENOPCODE_H
-#define _GENOPCODE_H
+#ifndef _APP_TEST_GENOPCODE_H
+#define _APP_TEST_GENOPCODE_H
 
 // [Dependencies]
 #include <asmjit/asmjit.h>
@@ -2307,4 +2307,4 @@ static void opcode(asmjit::host::Assembler& a) {
 } // asmgen namespace
 
 // [Guard]
-#endif // _GENOPCODE_H
+#endif // _APP_TEST_GENOPCODE_H
diff --git a/src/app/test/testx86.cpp b/src/app/test/testx86.cpp
index 010ad84..cf944cb 100644
--- a/src/app/test/testx86.cpp
+++ b/src/app/test/testx86.cpp
@@ -975,7 +975,7 @@ struct X86Test_AllocStack : public X86Test {
 
     // Fill stack by sequence [0, 1, 2, 3 ... 255].
     c.xor_(i, i);
-    
+
     c.bind(L_1);
     c.mov(stack.clone().setIndex(i, 0), i.r8());
     c.inc(i);
@@ -985,7 +985,7 @@ struct X86Test_AllocStack : public X86Test {
     // Sum sequence in stack.
     c.xor_(i, i);
     c.xor_(a, a);
-    
+
     c.bind(L_2);
     c.movzx(b, stack.clone().setIndex(i, 0));
     c.add(a, b);
@@ -1709,7 +1709,7 @@ X86TestSuite::X86TestSuite() :
   ADD_TEST(X86Test_AllocStack);
   ADD_TEST(X86Test_AllocMemcpy);
   ADD_TEST(X86Test_AllocBlend);
- 
+
   // Call.
   ADD_TEST(X86Test_CallBase);
   ADD_TEST(X86Test_CallFast);
diff --git a/src/asmjit/base/context.cpp b/src/asmjit/base/context.cpp
index 5e13c13..80885d0 100644
--- a/src/asmjit/base/context.cpp
+++ b/src/asmjit/base/context.cpp
@@ -186,7 +186,7 @@ Error BaseContext::resolveCellOffsets() {
 
   uint32_t stackAlignment = 0;
   if (stackCell != NULL)
-    stackAlignment = stackCell->getAlignment();  
+    stackAlignment = stackCell->getAlignment();
 
   uint32_t pos64 = 0;
   uint32_t pos32 = pos64 + _mem64ByteVarsUsed * 64;
@@ -200,7 +200,7 @@ Error BaseContext::resolveCellOffsets() {
 
   uint32_t gapAlignment = stackAlignment;
   uint32_t gapSize = 0;
- 
+
   if (gapAlignment)
     IntUtil::deltaTo(stackPos, gapAlignment);
   stackPos += gapSize;
@@ -301,7 +301,7 @@ Error BaseContext::removeUnreachableCode() {
 void BaseContext::cleanup() {
   VarData** array = _contextVd.getData();
   size_t length = _contextVd.getLength();
-  
+
   for (size_t i = 0; i < length; i++) {
     VarData* vd = array[i];
     vd->resetContextId();
diff --git a/src/asmjit/base/context_p.h b/src/asmjit/base/context_p.h
index 7d38ef4..c82aa9a 100644
--- a/src/asmjit/base/context_p.h
+++ b/src/asmjit/base/context_p.h
@@ -5,8 +5,8 @@
 // Zlib - See LICENSE.md file in the package.
 
 // [Guard]
-#ifndef _ASMJIT_BASE_CONTEXT_H
-#define _ASMJIT_BASE_CONTEXT_H
+#ifndef _ASMJIT_BASE_CONTEXT_P_H
+#define _ASMJIT_BASE_CONTEXT_P_H
 
 // [Dependencies - AsmJit]
 #include "../base/compiler.h"
@@ -251,4 +251,4 @@ struct BaseContext {
 #include "../base/apiend.h"
 
 // [Guard]
-#endif // _ASMJIT_BASE_CONTEXT_H
+#endif // _ASMJIT_BASE_CONTEXT_P_H
diff --git a/src/asmjit/contrib/winremoteruntime.h b/src/asmjit/contrib/winremoteruntime.h
index c65eaae..ea41753 100644
--- a/src/asmjit/contrib/winremoteruntime.h
+++ b/src/asmjit/contrib/winremoteruntime.h
@@ -56,7 +56,7 @@ struct WinRemoteRuntime : public BaseRuntime {
 
   //! @brief Process.
   HANDLE _hProcess;
-  
+
   //! @brief Virtual memory manager.
   VirtualMemoryManager _memoryManager;
 };
diff --git a/src/asmjit/x86/x86assembler.h b/src/asmjit/x86/x86assembler.h
index d90de12..16ba531 100644
--- a/src/asmjit/x86/x86assembler.h
+++ b/src/asmjit/x86/x86assembler.h
@@ -250,7 +250,7 @@ namespace x86x64 {
 //! to create invalid instruction (for example <code>mov [eax], [eax]</code>,
 //! because such overload doesn't exist.
 //!
-//! Each call to an assembler intrinsic function emits instruction directly 
+//! Each call to an assembler intrinsic function emits instruction directly
 //! to the binary stream. There are also runtime checks that prevent invalid
 //! code to be emitted. It will assert in debug mode and put the @ref Assembler
 //! instance to an  error state in production mode.
diff --git a/src/asmjit/x86/x86compiler.cpp b/src/asmjit/x86/x86compiler.cpp
index 20e1d63..d82d025 100644
--- a/src/asmjit/x86/x86compiler.cpp
+++ b/src/asmjit/x86/x86compiler.cpp
@@ -443,7 +443,7 @@ Error X86X64Compiler::setArg(uint32_t argIndex, BaseVar& var) {
 
 Error X86X64Compiler::_newVar(BaseVar* var, uint32_t vType, const char* name) {
   ASMJIT_ASSERT(vType < kVarTypeCount);
-  
+
   vType = _targetVarMapping[vType];
   const VarInfo& vInfo = _varInfo[vType];
 
diff --git a/src/asmjit/x86/x86context.cpp b/src/asmjit/x86/x86context.cpp
index bfe191a..c5f7ec2 100644
--- a/src/asmjit/x86/x86context.cpp
+++ b/src/asmjit/x86/x86context.cpp
@@ -1910,7 +1910,7 @@ _NextGroup:
                 uint32_t inReg = special[i].inReg;
                 uint32_t outReg = special[i].outReg;
                 uint32_t c;
-                
+
                 if (static_cast<const X86Reg*>(op)->isGp())
                   c = kRegClassGp;
                 else
diff --git a/src/asmjit/x86/x86defs.h b/src/asmjit/x86/x86defs.h
index 3a87d9e..5507ec9 100644
--- a/src/asmjit/x86/x86defs.h
+++ b/src/asmjit/x86/x86defs.h
@@ -11,10 +11,10 @@
 // [Dependencies - AsmJit]
 #include "../base/assembler.h"
 #include "../base/assert.h"
-#include "../base/defs.h"
-#include "../base/vectypes.h"
 #include "../base/compiler.h"
+#include "../base/defs.h"
 #include "../base/intutil.h"
+#include "../base/vectypes.h"
 
 // [Api-Begin]
 #include "../base/apibegin.h"
@@ -2543,7 +2543,7 @@ struct Mem : public BaseMem {
 
     _init_packed_op_sz_b0_b1_id(kOperandTypeMem, size, kMemTypeBaseIndex,
       _getGpdFlags(reinterpret_cast<const BaseVar&>(base))
-        + (kMemVSibXmm << kMemVSibIndex) 
+        + (kMemVSibXmm << kMemVSibIndex)
         + (shift << kMemShiftIndex),
       _OP_ID(base));
     _vmem.index = _OP_ID(index);
@@ -2555,7 +2555,7 @@ struct Mem : public BaseMem {
 
     _init_packed_op_sz_b0_b1_id(kOperandTypeMem, size, kMemTypeBaseIndex,
       _getGpdFlags(reinterpret_cast<const BaseVar&>(base))
-        + (kMemVSibYmm << kMemVSibIndex) 
+        + (kMemVSibYmm << kMemVSibIndex)
         + (shift << kMemShiftIndex),
       _OP_ID(base));
     _vmem.index = _OP_ID(index);
diff --git a/src/asmjit/x86/x86func.cpp b/src/asmjit/x86/x86func.cpp
index 79a90e5..f5d43ce 100644
--- a/src/asmjit/x86/x86func.cpp
+++ b/src/asmjit/x86/x86func.cpp
@@ -195,7 +195,7 @@ static uint32_t X86X64FuncDecl_initConv(X86X64FuncDecl* self, uint32_t arch, uin
 }
 #undef R
 
-static Error X86X64FuncDecl_initFunc(X86X64FuncDecl* self, uint32_t arch, 
+static Error X86X64FuncDecl_initFunc(X86X64FuncDecl* self, uint32_t arch,
   uint32_t ret, const uint32_t* argList, uint32_t argCount) {
 
   ASMJIT_ASSERT(argCount <= kFuncArgCount);
diff --git a/tools/src-sanity.js b/tools/src-sanity.js
index e309a37..0374abc 100644
--- a/tools/src-sanity.js
+++ b/tools/src-sanity.js
@@ -15,17 +15,19 @@ var filesToSanitize = (function() {
       var fullName = path.normalize(path.join(dir, baseName));
 
       var stat = fs.lstatSync(fullName);
-      if (stat.isSymbolicLink())
+      if (stat.isSymbolicLink()) {
         continue;
+      }
 
       if (stat.isDirectory()) {
-        listPrivate(subarray, path.join(dir, baseName), displayDir + baseName, accept);
+        subarray = listPrivate(subarray,
+          path.join(dir, baseName), displayDir ? displayDir + "/" + baseName : baseName, accept);
         continue;
       }
 
       if (stat.isFile()) {
         if (accept(baseName))
-          array.push({ name: fullName, display: displayDir + baseName });
+          array.push({ name: fullName, display: displayDir ? displayDir + "/" + baseName : baseName });
         continue;
       }
     }
@@ -38,6 +40,19 @@ var filesToSanitize = (function() {
   };
 })();
 
+/**
+ * Inject data into string.
+ */
+var inject = function(s, start, end, what) {
+  assert(start <= s.length);
+  assert(end <= s.length);
+
+  return s.substr(0, start) + what + s.substr(end);
+};
+
+/**
+ * Is the extension c++ header file?
+ */
 var isCppHeaderExt = function(ext) {
   return ext === ".h"     ||
          ext === ".hh"    ||
@@ -45,6 +60,9 @@ var isCppHeaderExt = function(ext) {
          ext === ".hxx"   ;
 };
 
+/**
+ * Is the extension c++ source file?
+ */
 var isCppSourceExt = function(ext) {
   return ext === ".c"     ||
          ext === ".cc"    ||
@@ -66,7 +84,10 @@ var filesToAccept = function(name) {
          ext === ".mm"       ;
 };
 
-var sanitySpaces = function(data) {
+/**
+ * Sanity spaces.
+ */
+var sanitySpaces = function(data, name) {
   // Remove carriage return.
   data = data.replace(/\r\n/g, "\n");
   // Remove spaces before the end of the line.
@@ -77,12 +98,109 @@ var sanitySpaces = function(data) {
   return data;
 };
 
-var sanityHeaderGuards = function(data) {
+/**
+ * Sanity header guards.
+ */
+var sanityHeaderGuards = (function() {
+  var parseGuardName = function(data, i) {
+    var m = data.substr(i).match(/[\w][\d\w]*/);
+    return m ? m[0] : null;
+  };
 
-  return data;
-};
+  var makeGuardName = function(name) {
+    // Remove leading '/' or '\'.
+    if (/^[\\\/]/.test(name))
+      name = name.substr(1);
+    return "_" + name.toUpperCase().replace(/[\/\\\.-]/g, "_");
+  };
 
-var sanityIncludeOrder = function(data, directive) {
+  var directiveMarks = [
+    "#ifndef ",
+    "#endif // ",
+    "#define "
+  ];
+
+  var directiveNames = [
+    "#ifndef ",
+    "#endif  ",
+    "#define "
+  ];
+
+  return function(data, name) {
+    var i = 0;
+    var nl = true;
+
+    var guard = "// " + "[Guard]" + "\n";
+    var nFound = 0;
+
+    while (i < data.length) {
+      if (nl && data.substr(i, guard.length) === guard) {
+        i += guard.length;
+        nFound++;
+
+        if (i >= data.length)
+          break;
+
+        for (var j = 0; j < directiveMarks.length; ) {
+          var m = directiveMarks[j];
+          if (data.substr(i, m.length) === m && data.charAt(i + m.length) === '_') {
+            i += directiveMarks[j].length;
+
+            var oldGuardName = parseGuardName(data, i);
+            var newGuardName;
+
+            if (oldGuardName) {
+              console.log(oldGuardName);
+              var startPosition = i;
+              var endPosition = i + oldGuardName.length;
+
+              newGuardName = makeGuardName(name);
+              if (oldGuardName !== newGuardName) {
+                console.log(name + ": " + directiveNames[j] + newGuardName);
+                data = inject(data, startPosition, endPosition, newGuardName);
+
+                i += newGuardName.length;
+                i = data.indexOf('\n', i);
+
+                if (i === -1) {
+                  // Terminates the loop.
+                  i = data.length;
+                  j = 9999;
+                  nl = false;
+                  break;
+                }
+                else {
+                  i++;
+                }
+              }
+            }
+            j += 2;
+          }
+          // Don't process '#define' directive if previous '#ifndef' wasn't matched.
+          else {
+            if (++j == 2)
+              break;
+          }
+        }
+      }
+      else {
+        nl = data.charAt(i) === '\n';
+        i++;
+      }
+    }
+
+    if (nFound & 1) {
+      console.log(name + ": Odd number of guards found: " + nFound);
+    }
+
+    return data;
+  };
+})();
+
+/**
+ * Sanity #include order.
+ */
+var sanityIncludeOrder = function(data, name, directive) {
   var i = 0;
   var nl = true;
 
@@ -92,7 +210,7 @@ var sanityIncludeOrder = function(data, directive) {
   var replacement;
   
   while (i < data.length) {
-    if (nl && data.indexOf(directive, i) === i) {
+    if (nl && data.substr(i, directive.length) === directive) {
       var iLocal = i
 
       if (startPosition === -1) {
@@ -105,7 +223,7 @@ var sanityIncludeOrder = function(data, directive) {
           list.push(data.substring(iLocal, i));
           break;
         }
-        if (data[i] === '\n') {
+        if (data.charAt(i) === '\n') {
           list.push(data.substring(iLocal, i));
           i++;
           break;
@@ -118,13 +236,10 @@ var sanityIncludeOrder = function(data, directive) {
 
       if (list.length > 1) {
         list.sort();
-        replacement = list.join("\n");
-        assert(replacement.length == endPosition - startPosition - 1);
+        replacement = list.join("\n") + "\n";
 
-        data = data.substring(0, startPosition) + 
-               replacement +
-               "\n" +
-               data.substring(endPosition);
+        assert(replacement.length == endPosition - startPosition);
+        data = inject(data, startPosition, endPosition, replacement);
       }
 
       startPosition = -1;
@@ -135,7 +250,7 @@ var sanityIncludeOrder = function(data, directive) {
       i++;
     }
     else {
-      nl = data[i] === '\n';
+      nl = data.charAt(i) === '\n';
       i++;
     }
   }
@@ -143,32 +258,34 @@ var sanityIncludeOrder = function(data, directive) {
   return data;
 };
 
+/**
+ * Sanity the given data of file.
+ */
 var sanity = function(data, name) {
   var ext = path.extname(name).toLowerCase();
 
   // Sanity spaces.
-  data = sanitySpaces(data);
+  data = sanitySpaces(data, name);
   
-  // Fix C/C++ header guards.
+  // Fix C/C++ header guards and sort '#include' files.
   if (isCppHeaderExt(ext)) {
-    data = sanityHeaderGuards(data);
-  }
-
-  // Sort #include files.
-  if (isCppHeaderExt(ext) || isCppSourceExt(ext)) {
-    data = sanityIncludeOrder(data, "#include");
+    data = sanityHeaderGuards(data, name);
+    data = sanityIncludeOrder(data, name, "#include");
   }
 
   return data;
 };
 
+/**
+ * Entry.
+ */
 var main = function(dir) {
   filesToSanitize(dir, filesToAccept).forEach(function(file) {
     var oldData = fs.readFileSync(file.name, "utf8");
     var newData = sanity(oldData, file.display);
 
     if (oldData !== newData) {
-      console.log("Sanitizing: " + file.display);
+      console.log(file.display + ": Writing...");
       fs.writeFileSync(file.name, newData, "utf8");
     }
   });