src: use static_cast where appropriate

Use static_cast instead of reinterpret_cast when casting from void*
to another type.

This is mostly an aesthetic change but may help catch bugs when the
affected code is modified.

Author: bnoordhuis

src/cares_wrap.cc

@@ -311,7 +311,7 @@ class QueryWrap {
 
   static void Callback(void *arg, int status, int timeouts,
       unsigned char* answer_buf, int answer_len) {
-    QueryWrap* wrap = reinterpret_cast<QueryWrap*>(arg);
+    QueryWrap* wrap = static_cast<QueryWrap*>(arg);
 
     if (status != ARES_SUCCESS) {
       wrap->ParseError(status);
@@ -324,7 +324,7 @@ class QueryWrap {
 
   static void Callback(void *arg, int status, int timeouts,
       struct hostent* host) {
-    QueryWrap* wrap = reinterpret_cast<QueryWrap*>(arg);
+    QueryWrap* wrap = static_cast<QueryWrap*>(arg);
 
     if (status != ARES_SUCCESS) {
       wrap->ParseError(status);

src/fs_event_wrap.cc

@@ -51,7 +51,7 @@ class FSEventWrap: public HandleWrap {
 
 FSEventWrap::FSEventWrap(Handle<Object> object): HandleWrap(object,
                                                     (uv_handle_t*)&handle_) {
-  handle_.data = reinterpret_cast<void*>(this);
+  handle_.data = static_cast<void*>(this);
   initialized_ = false;
 }
 
@@ -119,7 +119,7 @@ void FSEventWrap::OnEvent(uv_fs_event_t* handle, const char* filename,
   HandleScope scope;
   Local<String> eventStr;
 
-  FSEventWrap* wrap = reinterpret_cast<FSEventWrap*>(handle->data);
+  FSEventWrap* wrap = static_cast<FSEventWrap*>(handle->data);
 
   assert(wrap->object_.IsEmpty() == false);
 

src/node_buffer.h

@@ -75,7 +75,7 @@ class NODE_EXTERN Buffer: public ObjectWrap {
   static inline char* Data(v8::Handle<v8::Value> val) {
     assert(val->IsObject());
     void* data = val.As<v8::Object>()->GetIndexedPropertiesExternalArrayData();
-    return reinterpret_cast<char*>(data);
+    return static_cast<char*>(data);
   }
 
   static inline char* Data(Buffer *b) {

src/pipe_wrap.cc

@@ -129,7 +129,7 @@ PipeWrap::PipeWrap(Handle<Object> object, bool ipc)
   int r = uv_pipe_init(uv_default_loop(), &handle_, ipc);
   assert(r == 0); // How do we proxy this error up to javascript?
                   // Suggestion: uv_pipe_init() returns void.
-  handle_.data = reinterpret_cast<void*>(this);
+  handle_.data = static_cast<void*>(this);
   UpdateWriteQueueSize();
 }
 

src/v8_typed_array.cc

@@ -255,7 +255,7 @@ class TypedArray {
       }
 
       void* buf = buffer->GetIndexedPropertiesExternalArrayData();
-      char* begin = reinterpret_cast<char*>(buf) + byte_offset;
+      char* begin = static_cast<char*>(buf) + byte_offset;
 
       if (!checkAlignment(reinterpret_cast<uintptr_t>(begin), TBytes))
         return ThrowRangeError("Byte offset is not aligned.");
@@ -374,7 +374,7 @@ class TypedArray {
         // place as if all the data is first copied into a temporary buffer that
         // does not overlap either of the arrays, and then the data from the
         // temporary buffer is copied into the current array.
-        memmove(reinterpret_cast<char*>(dst_ptr) + offset * TBytes, src_ptr,
+        memmove(static_cast<char*>(dst_ptr) + offset * TBytes, src_ptr,
             src_length * TBytes);
       } else {  // type[]
         if (args[1]->Int32Value() < 0)
@@ -643,7 +643,7 @@ class DataView {
 
     // Like ArrayBuffer, we violate the spec and add an operator[].
     args.This()->SetIndexedPropertiesToExternalArrayData(
-        reinterpret_cast<char*>(buf) + byte_offset,
+        static_cast<char*>(buf) + byte_offset,
         v8::kExternalUnsignedByteArray, byte_length);
 
     args.This()->Set(v8::String::New("buffer"),
@@ -670,7 +670,7 @@ class DataView {
   template <typename T>
   static T getValue(void* ptr, unsigned int index, bool swiz) {
     char buf[sizeof(T)];
-    memcpy(buf, reinterpret_cast<char*>(ptr) + index, sizeof(T));
+    memcpy(buf, static_cast<char*>(ptr) + index, sizeof(T));
     if (swiz)
       swizzle(buf, sizeof(T));
     T val;
@@ -684,7 +684,7 @@ class DataView {
     memcpy(buf, &val, sizeof(T));
     if (swiz)
       swizzle(buf, sizeof(T));
-    memcpy(reinterpret_cast<char*>(ptr) + index, buf, sizeof(T));
+    memcpy(static_cast<char*>(ptr) + index, buf, sizeof(T));
   }
 
   template <typename T>