diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index 1b166f3..eb8188b 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -117,7 +117,7 @@
             return;
         case BINDER_TYPE_HANDLE: {
             const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
-            if (b != NULL) {
+            if (b != nullptr) {
                 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get());
                 b->incStrong(who);
             }
@@ -125,11 +125,11 @@
         }
         case BINDER_TYPE_WEAK_HANDLE: {
             const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
-            if (b != NULL) b.get_refs()->incWeak(who);
+            if (b != nullptr) b.get_refs()->incWeak(who);
             return;
         }
         case BINDER_TYPE_FD: {
-            if ((obj.cookie != 0) && (outAshmemSize != NULL) && ashmem_valid(obj.handle)) {
+            if ((obj.cookie != 0) && (outAshmemSize != nullptr) && ashmem_valid(obj.handle)) {
                 // If we own an ashmem fd, keep track of how much memory it refers to.
                 int size = ashmem_get_size_region(obj.handle);
                 if (size > 0) {
@@ -146,7 +146,7 @@
 void acquire_object(const sp<ProcessState>& proc,
     const flat_binder_object& obj, const void* who)
 {
-    acquire_object(proc, obj, who, NULL);
+    acquire_object(proc, obj, who, nullptr);
 }
 
 static void release_object(const sp<ProcessState>& proc,
@@ -165,7 +165,7 @@
             return;
         case BINDER_TYPE_HANDLE: {
             const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle);
-            if (b != NULL) {
+            if (b != nullptr) {
                 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get());
                 b->decStrong(who);
             }
@@ -173,12 +173,12 @@
         }
         case BINDER_TYPE_WEAK_HANDLE: {
             const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle);
-            if (b != NULL) b.get_refs()->decWeak(who);
+            if (b != nullptr) b.get_refs()->decWeak(who);
             return;
         }
         case BINDER_TYPE_FD: {
             if (obj.cookie != 0) { // owned
-                if ((outAshmemSize != NULL) && ashmem_valid(obj.handle)) {
+                if ((outAshmemSize != nullptr) && ashmem_valid(obj.handle)) {
                     int size = ashmem_get_size_region(obj.handle);
                     if (size > 0) {
                         *outAshmemSize -= size;
@@ -197,7 +197,7 @@
 void release_object(const sp<ProcessState>& proc,
     const flat_binder_object& obj, const void* who)
 {
-    release_object(proc, obj, who, NULL);
+    release_object(proc, obj, who, nullptr);
 }
 
 inline static status_t finish_flatten_binder(
@@ -219,11 +219,11 @@
         obj.flags = 0x13 | FLAT_BINDER_FLAG_ACCEPTS_FDS;
     }
 
-    if (binder != NULL) {
+    if (binder != nullptr) {
         IBinder *local = binder->localBinder();
         if (!local) {
             BpBinder *proxy = binder->remoteBinder();
-            if (proxy == NULL) {
+            if (proxy == nullptr) {
                 ALOGE("null proxy");
             }
             const int32_t handle = proxy ? proxy->handle() : 0;
@@ -251,13 +251,13 @@
     flat_binder_object obj;
 
     obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS;
-    if (binder != NULL) {
+    if (binder != nullptr) {
         sp<IBinder> real = binder.promote();
-        if (real != NULL) {
+        if (real != nullptr) {
             IBinder *local = real->localBinder();
             if (!local) {
                 BpBinder *proxy = real->remoteBinder();
-                if (proxy == NULL) {
+                if (proxy == nullptr) {
                     ALOGE("null proxy");
                 }
                 const int32_t handle = proxy ? proxy->handle() : 0;
@@ -284,13 +284,13 @@
         obj.hdr.type = BINDER_TYPE_BINDER;
         obj.binder = 0;
         obj.cookie = 0;
-        return finish_flatten_binder(NULL, obj, out);
+        return finish_flatten_binder(nullptr, obj, out);
 
     } else {
         obj.hdr.type = BINDER_TYPE_BINDER;
         obj.binder = 0;
         obj.cookie = 0;
-        return finish_flatten_binder(NULL, obj, out);
+        return finish_flatten_binder(nullptr, obj, out);
     }
 }
 
@@ -310,7 +310,7 @@
         switch (flat->hdr.type) {
             case BINDER_TYPE_BINDER:
                 *out = reinterpret_cast<IBinder*>(flat->cookie);
-                return finish_unflatten_binder(NULL, *flat, in);
+                return finish_unflatten_binder(nullptr, *flat, in);
             case BINDER_TYPE_HANDLE:
                 *out = proc->getStrongProxyForHandle(flat->handle);
                 return finish_unflatten_binder(
@@ -329,16 +329,16 @@
         switch (flat->hdr.type) {
             case BINDER_TYPE_BINDER:
                 *out = reinterpret_cast<IBinder*>(flat->cookie);
-                return finish_unflatten_binder(NULL, *flat, in);
+                return finish_unflatten_binder(nullptr, *flat, in);
             case BINDER_TYPE_WEAK_BINDER:
                 if (flat->binder != 0) {
                     out->set_object_and_refs(
                         reinterpret_cast<IBinder*>(flat->cookie),
                         reinterpret_cast<RefBase::weakref_type*>(flat->binder));
                 } else {
-                    *out = NULL;
+                    *out = nullptr;
                 }
-                return finish_unflatten_binder(NULL, *flat, in);
+                return finish_unflatten_binder(nullptr, *flat, in);
             case BINDER_TYPE_HANDLE:
             case BINDER_TYPE_WEAK_HANDLE:
                 *out = proc->getWeakProxyForHandle(flat->handle);
@@ -526,7 +526,7 @@
             if (newSize*sizeof(binder_size_t) < mObjectsSize) return NO_MEMORY;   // overflow
             binder_size_t *objects =
                 (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
-            if (objects == (binder_size_t*)0) {
+            if (objects == (binder_size_t*)nullptr) {
                 return NO_MEMORY;
             }
             mObjects = objects;
@@ -614,7 +614,7 @@
                               IPCThreadState* threadState) const
 {
     int32_t strictPolicy = readInt32();
-    if (threadState == NULL) {
+    if (threadState == nullptr) {
         threadState = IPCThreadState::self();
     }
     if ((threadState->getLastTransactionBinderFlags() &
@@ -722,14 +722,14 @@
     if (len > INT32_MAX) {
         // don't accept size_t values which may have come from an
         // inadvertent conversion from a negative int.
-        return NULL;
+        return nullptr;
     }
 
     const size_t padded = pad_size(len);
 
     // sanity check for integer overflow
     if (mDataPos+padded < mDataPos) {
-        return NULL;
+        return nullptr;
     }
 
     if ((mDataPos+padded) <= mDataCapacity) {
@@ -760,7 +760,7 @@
 
     status_t err = growData(padded);
     if (err == NO_ERROR) goto restart_write;
-    return NULL;
+    return nullptr;
 }
 
 status_t Parcel::writeUtf8AsUtf16(const std::string& str) {
@@ -1063,7 +1063,7 @@
 
 status_t Parcel::writeString16(const char16_t* str, size_t len)
 {
-    if (str == NULL) return writeInt32(-1);
+    if (str == nullptr) return writeInt32(-1);
 
     status_t err = writeInt32(len);
     if (err == NO_ERROR) {
@@ -1221,7 +1221,7 @@
     if (result < 0) {
         status = result;
     } else {
-        void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+        void* ptr = ::mmap(nullptr, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
         if (ptr == MAP_FAILED) {
             status = -errno;
         } else {
@@ -1281,7 +1281,7 @@
     if (buf == nullptr)
         return BAD_VALUE;
 
-    int* fds = NULL;
+    int* fds = nullptr;
     if (fd_count) {
         fds = new (std::nothrow) int[fd_count];
         if (fds == nullptr) {
@@ -1337,7 +1337,7 @@
         size_t newSize = ((mObjectsSize+2)*3)/2;
         if (newSize*sizeof(binder_size_t) < mObjectsSize) return NO_MEMORY;   // overflow
         binder_size_t* objects = (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t));
-        if (objects == NULL) return NO_MEMORY;
+        if (objects == nullptr) return NO_MEMORY;
         mObjects = objects;
         mObjectsCapacity = newSize;
     }
@@ -1383,7 +1383,7 @@
 
 status_t Parcel::writeNullableMap(const std::unique_ptr<binder::Map>& map)
 {
-    if (map == NULL) {
+    if (map == nullptr) {
         return writeInt32(-1);
     }
 
@@ -1555,7 +1555,7 @@
     if (len > INT32_MAX) {
         // don't accept size_t values which may have come from an
         // inadvertent conversion from a negative int.
-        return NULL;
+        return nullptr;
     }
 
     if ((mDataPos+pad_size(len)) >= mDataPos && (mDataPos+pad_size(len)) <= mDataSize
@@ -1575,7 +1575,7 @@
         ALOGV("readInplace Setting data pos of %p to %zu", this, mDataPos);
         return data;
     }
-    return NULL;
+    return nullptr;
 }
 
 template<class T>
@@ -2025,7 +2025,7 @@
             return str;
         }
     }
-    return NULL;
+    return nullptr;
 }
 
 String8 Parcel::readString8() const
@@ -2056,7 +2056,7 @@
         return OK;
     }
     const char* str = (const char*)readInplace(size + 1);
-    if (str == NULL) {
+    if (str == nullptr) {
         return BAD_VALUE;
     }
     pArg->setTo(str, size);
@@ -2115,12 +2115,12 @@
     if (size >= 0 && size < INT32_MAX) {
         *outLen = size;
         const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t));
-        if (str != NULL) {
+        if (str != nullptr) {
             return str;
         }
     }
     *outLen = 0;
-    return NULL;
+    return nullptr;
 }
 
 status_t Parcel::readStrongBinder(sp<IBinder>* val) const
@@ -2182,13 +2182,13 @@
     int numFds, numInts;
     status_t err;
     err = readInt32(&numFds);
-    if (err != NO_ERROR) return 0;
+    if (err != NO_ERROR) return nullptr;
     err = readInt32(&numInts);
-    if (err != NO_ERROR) return 0;
+    if (err != NO_ERROR) return nullptr;
 
     native_handle* h = native_handle_create(numFds, numInts);
     if (!h) {
-        return 0;
+        return nullptr;
     }
 
     for (int i=0 ; err==NO_ERROR && i<numFds ; i++) {
@@ -2198,14 +2198,14 @@
                 close(h->data[j]);
             }
             native_handle_delete(h);
-            return 0;
+            return nullptr;
         }
     }
     err = read(h->data + numFds, sizeof(int)*numInts);
     if (err != NO_ERROR) {
         native_handle_close(h);
         native_handle_delete(h);
-        h = 0;
+        h = nullptr;
     }
     return h;
 }
@@ -2278,7 +2278,7 @@
     int fd = readFileDescriptor();
     if (fd == int(BAD_TYPE)) return BAD_VALUE;
 
-    void* ptr = ::mmap(NULL, len, isMutable ? PROT_READ | PROT_WRITE : PROT_READ,
+    void* ptr = ::mmap(nullptr, len, isMutable ? PROT_READ | PROT_WRITE : PROT_READ,
             MAP_SHARED, fd, 0);
     if (ptr == MAP_FAILED) return NO_MEMORY;
 
@@ -2300,10 +2300,10 @@
 
     // payload
     void const* const buf = this->readInplace(pad_size(len));
-    if (buf == NULL)
+    if (buf == nullptr)
         return BAD_VALUE;
 
-    int* fds = NULL;
+    int* fds = nullptr;
     if (fd_count) {
         fds = new (std::nothrow) int[fd_count];
         if (fds == nullptr) {
@@ -2394,7 +2394,7 @@
         ALOGW("Attempt to read object from Parcel %p at offset %zu that is not in the object list",
              this, DPOS);
     }
-    return NULL;
+    return nullptr;
 }
 
 void Parcel::closeFileDescriptors()
@@ -2604,7 +2604,7 @@
     ALOGV("restartWrite Setting data pos of %p to %zu", this, mDataPos);
 
     free(mObjects);
-    mObjects = NULL;
+    mObjects = nullptr;
     mObjectsSize = mObjectsCapacity = 0;
     mNextObjectHint = 0;
     mObjectsSorted = false;
@@ -2652,7 +2652,7 @@
             mError = NO_MEMORY;
             return NO_MEMORY;
         }
-        binder_size_t* objects = NULL;
+        binder_size_t* objects = nullptr;
 
         if (objectsSize) {
             objects = (binder_size_t*)calloc(objectsSize, sizeof(binder_size_t));
@@ -2679,7 +2679,7 @@
         }
         //ALOGI("Freeing data ref of %p (pid=%d)", this, getpid());
         mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie);
-        mOwner = NULL;
+        mOwner = nullptr;
 
         LOG_ALLOC("Parcel %p: taking ownership of %zu capacity", this, desired);
         pthread_mutex_lock(&gParcelGlobalAllocSizeLock);
@@ -2754,7 +2754,7 @@
             return NO_MEMORY;
         }
 
-        if(!(mDataCapacity == 0 && mObjects == NULL
+        if(!(mDataCapacity == 0 && mObjects == nullptr
              && mObjectsCapacity == 0)) {
             ALOGE("continueWrite: %zu/%p/%zu/%zu", mDataCapacity, mObjects, mObjectsCapacity, desired);
         }
@@ -2779,13 +2779,13 @@
 {
     LOG_ALLOC("Parcel %p: initState", this);
     mError = NO_ERROR;
-    mData = 0;
+    mData = nullptr;
     mDataSize = 0;
     mDataCapacity = 0;
     mDataPos = 0;
     ALOGV("initState Setting data size of %p to %zu", this, mDataSize);
     ALOGV("initState Setting data pos of %p to %zu", this, mDataPos);
-    mObjects = NULL;
+    mObjects = nullptr;
     mObjectsSize = 0;
     mObjectsCapacity = 0;
     mNextObjectHint = 0;
@@ -2793,7 +2793,7 @@
     mHasFds = false;
     mFdsKnown = true;
     mAllowFds = true;
-    mOwner = NULL;
+    mOwner = nullptr;
     mOpenAshmemSize = 0;
 
     // racing multiple init leads only to multiple identical write
@@ -2840,7 +2840,7 @@
 // --- Parcel::Blob ---
 
 Parcel::Blob::Blob() :
-        mFd(-1), mData(NULL), mSize(0), mMutable(false) {
+        mFd(-1), mData(nullptr), mSize(0), mMutable(false) {
 }
 
 Parcel::Blob::~Blob() {
@@ -2863,7 +2863,7 @@
 
 void Parcel::Blob::clear() {
     mFd = -1;
-    mData = NULL;
+    mData = nullptr;
     mSize = 0;
     mMutable = false;
 }