src, tools: add check for left leaning pointers

This commit adds a rule to cpplint to check that pointers in the code
base lean to the left and not right, and also fixes the violations
reported.

PR-URL: nodejs#21010
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/cares_wrap.cc

@@ -633,7 +633,7 @@ class QueryWrap : public AsyncWrap {
     wrap->env()->CloseHandle(handle, CaresAsyncClose);
   }
 
-  static void Callback(void *arg, int status, int timeouts,
+  static void Callback(void* arg, int status, int timeouts,
                        unsigned char* answer_buf, int answer_len) {
     QueryWrap* wrap = static_cast<QueryWrap*>(arg);
 
@@ -661,7 +661,7 @@ class QueryWrap : public AsyncWrap {
     uv_async_send(async_handle);
   }
 
-  static void Callback(void *arg, int status, int timeouts,
+  static void Callback(void* arg, int status, int timeouts,
                        struct hostent* host) {
     QueryWrap* wrap = static_cast<QueryWrap*>(arg);
 

src/env-inl.h

@@ -349,7 +349,7 @@ inline uv_idle_t* Environment::immediate_idle_handle() {
 
 inline void Environment::RegisterHandleCleanup(uv_handle_t* handle,
                                                HandleCleanupCb cb,
-                                               void *arg) {
+                                               void* arg) {
   handle_cleanup_queue_.push_back(HandleCleanup{handle, cb, arg});
 }
 

src/env.h

@@ -615,7 +615,7 @@ class Environment {
   // Register clean-up cb to be called on environment destruction.
   inline void RegisterHandleCleanup(uv_handle_t* handle,
                                     HandleCleanupCb cb,
-                                    void *arg);
+                                    void* arg);
 
   template <typename T, typename OnCloseCallback>
   inline void CloseHandle(T* handle, OnCloseCallback callback);

src/exceptions.cc

@@ -22,9 +22,9 @@ using v8::Value;
 
 Local<Value> ErrnoException(Isolate* isolate,
                             int errorno,
-                            const char *syscall,
-                            const char *msg,
-                            const char *path) {
+                            const char* syscall,
+                            const char* msg,
+                            const char* path) {
   Environment* env = Environment::GetCurrent(isolate);
 
   Local<Value> e;
@@ -143,8 +143,8 @@ Local<Value> UVException(Isolate* isolate,
 #ifdef _WIN32
 // Does about the same as strerror(),
 // but supports all windows error messages
-static const char *winapi_strerror(const int errorno, bool* must_free) {
-  char *errmsg = nullptr;
+static const char* winapi_strerror(const int errorno, bool* must_free) {
+  char* errmsg = nullptr;
 
   FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
       FORMAT_MESSAGE_IGNORE_INSERTS, nullptr, errorno,

src/node.cc

@@ -320,15 +320,15 @@ static struct {
   }
 
 #if HAVE_INSPECTOR
-  bool StartInspector(Environment *env, const char* script_path,
+  bool StartInspector(Environment* env, const char* script_path,
                       const DebugOptions& options) {
     // Inspector agent can't fail to start, but if it was configured to listen
     // right away on the websocket port and fails to bind/etc, this will return
     // false.
     return env->inspector_agent()->Start(platform_, script_path, options);
   }
 
-  bool InspectorStarted(Environment *env) {
+  bool InspectorStarted(Environment* env) {
     return env->inspector_agent()->IsStarted();
   }
 #endif  // HAVE_INSPECTOR
@@ -357,7 +357,7 @@ static struct {
   void Dispose() {}
   void DrainVMTasks(Isolate* isolate) {}
   void CancelVMTasks(Isolate* isolate) {}
-  bool StartInspector(Environment *env, const char* script_path,
+  bool StartInspector(Environment* env, const char* script_path,
                       const DebugOptions& options) {
     env->ThrowError("Node compiled with NODE_USE_V8_PLATFORM=0");
     return true;
@@ -379,7 +379,7 @@ static struct {
 #endif  // !NODE_USE_V8_PLATFORM
 
 #if !NODE_USE_V8_PLATFORM || !HAVE_INSPECTOR
-  bool InspectorStarted(Environment *env) {
+  bool InspectorStarted(Environment* env) {
     return false;
   }
 #endif  //  !NODE_USE_V8_PLATFORM || !HAVE_INSPECTOR
@@ -424,7 +424,7 @@ static void PrintErrorString(const char* format, ...) {
   va_end(ap);
 }
 
-const char *signo_string(int signo) {
+const char* signo_string(int signo) {
 #define SIGNO_CASE(e)  case e: return #e;
   switch (signo) {
 #ifdef SIGHUP
@@ -2442,7 +2442,7 @@ static void EnvEnumerator(const PropertyCallbackInfo<Array>& info) {
   Local<Array> envarr = Array::New(isolate);
   WCHAR* p = environment;
   while (*p) {
-    WCHAR *s;
+    WCHAR* s;
     if (*p == L'=') {
       // If the key starts with '=' it is a hidden environment variable.
       p += wcslen(p) + 1;

src/node.h

@@ -208,7 +208,7 @@ NODE_EXTERN extern bool force_fips_crypto;
 # endif
 #endif
 
-NODE_EXTERN int Start(int argc, char *argv[]);
+NODE_EXTERN int Start(int argc, char* argv[]);
 NODE_EXTERN void Init(int* argc,
                       const char** argv,
                       int* exec_argc,
@@ -455,14 +455,14 @@ NODE_DEPRECATED("Use DecodeWrite(isolate, ...)",
 NODE_EXTERN v8::Local<v8::Value> WinapiErrnoException(
     v8::Isolate* isolate,
     int errorno,
-    const char *syscall = nullptr,
-    const char *msg = "",
-    const char *path = nullptr);
+    const char* syscall = nullptr,
+    const char* msg = "",
+    const char* path = nullptr);
 
 NODE_DEPRECATED("Use WinapiErrnoException(isolate, ...)",
                 inline v8::Local<v8::Value> WinapiErrnoException(int errorno,
-    const char *syscall = nullptr,  const char *msg = "",
-    const char *path = nullptr) {
+    const char* syscall = nullptr,  const char* msg = "",
+    const char* path = nullptr) {
   return WinapiErrnoException(v8::Isolate::GetCurrent(),
                               errorno,
                               syscall,
@@ -471,7 +471,7 @@ NODE_DEPRECATED("Use WinapiErrnoException(isolate, ...)",
 })
 #endif
 
-const char *signo_string(int errorno);
+const char* signo_string(int errorno);
 
 
 typedef void (*addon_register_func)(

src/node_api_types.h

@@ -10,16 +10,16 @@
 
 // JSVM API types are all opaque pointers for ABI stability
 // typedef undefined structs instead of void* for compile time type safety
-typedef struct napi_env__ *napi_env;
-typedef struct napi_value__ *napi_value;
-typedef struct napi_ref__ *napi_ref;
-typedef struct napi_handle_scope__ *napi_handle_scope;
-typedef struct napi_escapable_handle_scope__ *napi_escapable_handle_scope;
-typedef struct napi_callback_scope__ *napi_callback_scope;
-typedef struct napi_callback_info__ *napi_callback_info;
-typedef struct napi_async_context__ *napi_async_context;
-typedef struct napi_async_work__ *napi_async_work;
-typedef struct napi_deferred__ *napi_deferred;
+typedef struct napi_env__* napi_env;
+typedef struct napi_value__* napi_value;
+typedef struct napi_ref__* napi_ref;
+typedef struct napi_handle_scope__* napi_handle_scope;
+typedef struct napi_escapable_handle_scope__* napi_escapable_handle_scope;
+typedef struct napi_callback_scope__* napi_callback_scope;
+typedef struct napi_callback_info__* napi_callback_info;
+typedef struct napi_async_context__* napi_async_context;
+typedef struct napi_async_work__* napi_async_work;
+typedef struct napi_deferred__* napi_deferred;
 
 typedef enum {
   napi_default = 0,

src/node_crypto.cc

@@ -3985,8 +3985,8 @@ bool DiffieHellman::Init(const char* p, int p_len, int g) {
 
 bool DiffieHellman::Init(const char* p, int p_len, const char* g, int g_len) {
   dh_.reset(DH_new());
-  BIGNUM *bn_p = BN_bin2bn(reinterpret_cast<const unsigned char*>(p), p_len, 0);
-  BIGNUM *bn_g = BN_bin2bn(reinterpret_cast<const unsigned char*>(g), g_len, 0);
+  BIGNUM* bn_p = BN_bin2bn(reinterpret_cast<const unsigned char*>(p), p_len, 0);
+  BIGNUM* bn_g = BN_bin2bn(reinterpret_cast<const unsigned char*>(g), g_len, 0);
   if (!DH_set0_pqg(dh_.get(), bn_p, nullptr, bn_g)) {
     BN_free(bn_p);
     BN_free(bn_g);

src/node_crypto.h

@@ -368,12 +368,12 @@ class CipherBase : public BaseObject {
               const char* iv,
               int iv_len,
               unsigned int auth_tag_len);
-  bool InitAuthenticated(const char *cipher_type, int iv_len,
+  bool InitAuthenticated(const char* cipher_type, int iv_len,
                          unsigned int auth_tag_len);
   bool CheckCCMMessageLength(int message_len);
   UpdateResult Update(const char* data, int len, unsigned char** out,
                       int* out_len);
-  bool Final(unsigned char** out, int *out_len);
+  bool Final(unsigned char** out, int* out_len);
   bool SetAutoPadding(bool auto_padding);
 
   bool IsAuthenticatedMode() const;
@@ -492,7 +492,7 @@ class Sign : public SignBase {
                   int key_pem_len,
                   const char* passphrase,
                   unsigned char* sig,
-                  unsigned int *sig_len,
+                  unsigned int* sig_len,
                   int padding,
                   int saltlen);
 
@@ -532,10 +532,10 @@ class Verify : public SignBase {
 
 class PublicKeyCipher {
  public:
-  typedef int (*EVP_PKEY_cipher_init_t)(EVP_PKEY_CTX *ctx);
-  typedef int (*EVP_PKEY_cipher_t)(EVP_PKEY_CTX *ctx,
-                                   unsigned char *out, size_t *outlen,
-                                   const unsigned char *in, size_t inlen);
+  typedef int (*EVP_PKEY_cipher_init_t)(EVP_PKEY_CTX* ctx);
+  typedef int (*EVP_PKEY_cipher_t)(EVP_PKEY_CTX* ctx,
+                                   unsigned char* out, size_t* outlen,
+                                   const unsigned char* in, size_t inlen);
 
   enum Operation {
     kPublic,

src/node_dtrace.cc

@@ -194,7 +194,7 @@ void DTRACE_HTTP_SERVER_RESPONSE(const FunctionCallbackInfo<Value>& args) {
 
 void DTRACE_HTTP_CLIENT_REQUEST(const FunctionCallbackInfo<Value>& args) {
   node_dtrace_http_client_request_t req;
-  char *header;
+  char* header;
 
   if (!NODE_HTTP_CLIENT_REQUEST_ENABLED())
     return;
@@ -259,7 +259,7 @@ void InitDTrace(Environment* env, Local<Object> target) {
   HandleScope scope(env->isolate());
 
   static struct {
-    const char *name;
+    const char* name;
     void (*func)(const FunctionCallbackInfo<Value>&);
   } tab[] = {
 #define NODE_PROBE(name) #name, name

src/node_errors.h

@@ -96,15 +96,15 @@ inline void THROW_ERR_SCRIPT_EXECUTION_TIMEOUT(Environment* env,
   THROW_ERR_SCRIPT_EXECUTION_TIMEOUT(env, message.str().c_str());
 }
 
-inline v8::Local<v8::Value> ERR_BUFFER_TOO_LARGE(v8::Isolate *isolate) {
+inline v8::Local<v8::Value> ERR_BUFFER_TOO_LARGE(v8::Isolate* isolate) {
   char message[128];
   snprintf(message, sizeof(message),
       "Cannot create a Buffer larger than 0x%lx bytes",
       v8::TypedArray::kMaxLength);
   return ERR_BUFFER_TOO_LARGE(isolate, message);
 }
 
-inline v8::Local<v8::Value> ERR_STRING_TOO_LONG(v8::Isolate *isolate) {
+inline v8::Local<v8::Value> ERR_STRING_TOO_LONG(v8::Isolate* isolate) {
   char message[128];
   snprintf(message, sizeof(message),
       "Cannot create a string longer than 0x%x characters",

src/node_file.cc

@@ -659,7 +659,7 @@ inline int SyncCall(Environment* env, Local<Value> ctx, FSReqWrapSync* req_wrap,
   if (err < 0) {
     Local<Context> context = env->context();
     Local<Object> ctx_obj = ctx.As<Object>();
-    Isolate *isolate = env->isolate();
+    Isolate* isolate = env->isolate();
     ctx_obj->Set(context,
              env->errno_string(),
              Integer::New(isolate, err)).FromJust();

src/node_http2.cc

@@ -840,7 +840,7 @@ int Http2Session::OnFrameReceive(nghttp2_session* handle,
 }
 
 int Http2Session::OnInvalidFrame(nghttp2_session* handle,
-                                 const nghttp2_frame *frame,
+                                 const nghttp2_frame* frame,
                                  int lib_error_code,
                                  void* user_data) {
   Http2Session* session = static_cast<Http2Session*>(user_data);

src/node_http2.h

@@ -965,7 +965,7 @@ class Http2Session : public AsyncWrap, public StreamListener {
       void* user_data);
   static int OnInvalidFrame(
       nghttp2_session* session,
-      const nghttp2_frame *frame,
+      const nghttp2_frame* frame,
       int lib_error_code,
       void* user_data);
 

src/node_internals.h

@@ -549,7 +549,7 @@ int ThreadPoolWork::CancelWork() {
   return uv_cancel(reinterpret_cast<uv_req_t*>(&work_req_));
 }
 
-static inline const char *errno_string(int errorno) {
+static inline const char* errno_string(int errorno) {
 #define ERRNO_CASE(e)  case e: return #e;
   switch (errorno) {
 #ifdef EACCES

src/node_main.cc

@@ -27,7 +27,7 @@
 #include <VersionHelpers.h>
 #include <WinError.h>
 
-int wmain(int argc, wchar_t *wargv[]) {
+int wmain(int argc, wchar_t* wargv[]) {
   if (!IsWindows7OrGreater()) {
     fprintf(stderr, "This application is only supported on Windows 7, "
                     "Windows Server 2008 R2, or higher.");
@@ -91,7 +91,7 @@ namespace node {
   extern bool linux_at_secure;
 }  // namespace node
 
-int main(int argc, char *argv[]) {
+int main(int argc, char* argv[]) {
 #if defined(__POSIX__) && defined(NODE_SHARED_MODE)
   // In node::PlatformInit(), we squash all signal handlers for non-shared lib
   // build. In order to run test cases against shared lib build, we also need

src/node_platform.cc

@@ -16,7 +16,7 @@ using v8::Platform;
 using v8::Task;
 using v8::TracingController;
 
-static void BackgroundRunner(void *data) {
+static void BackgroundRunner(void* data) {
   TRACE_EVENT_METADATA1("__metadata", "thread_name", "name",
                         "BackgroundTaskRunner");
   TaskQueue<Task> *background_tasks = static_cast<TaskQueue<Task> *>(data);

src/node_win32_etw_provider-inl.h

@@ -120,8 +120,8 @@ extern int events_enabled;
 
 
 void NODE_HTTP_SERVER_REQUEST(node_dtrace_http_server_request_t* req,
-    node_dtrace_connection_t* conn, const char *remote, int port,
-    const char *method, const char *url, int fd) {
+    node_dtrace_connection_t* conn, const char* remote, int port,
+    const char* method, const char* url, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[7];
   ETW_WRITE_HTTP_SERVER_REQUEST(descriptors, req);
   ETW_WRITE_NET_CONNECTION(descriptors + 3, conn);
@@ -130,16 +130,16 @@ void NODE_HTTP_SERVER_REQUEST(node_dtrace_http_server_request_t* req,
 
 
 void NODE_HTTP_SERVER_RESPONSE(node_dtrace_connection_t* conn,
-    const char *remote, int port, int fd) {
+    const char* remote, int port, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[4];
   ETW_WRITE_NET_CONNECTION(descriptors, conn);
   ETW_WRITE_EVENT(NODE_HTTP_SERVER_RESPONSE_EVENT, descriptors);
 }
 
 
 void NODE_HTTP_CLIENT_REQUEST(node_dtrace_http_client_request_t* req,
-    node_dtrace_connection_t* conn, const char *remote, int port,
-    const char *method, const char *url, int fd) {
+    node_dtrace_connection_t* conn, const char* remote, int port,
+    const char* method, const char* url, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[6];
   ETW_WRITE_HTTP_CLIENT_REQUEST(descriptors, req);
   ETW_WRITE_NET_CONNECTION(descriptors + 2, conn);
@@ -148,23 +148,23 @@ void NODE_HTTP_CLIENT_REQUEST(node_dtrace_http_client_request_t* req,
 
 
 void NODE_HTTP_CLIENT_RESPONSE(node_dtrace_connection_t* conn,
-    const char *remote, int port, int fd) {
+    const char* remote, int port, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[4];
   ETW_WRITE_NET_CONNECTION(descriptors, conn);
   ETW_WRITE_EVENT(NODE_HTTP_CLIENT_RESPONSE_EVENT, descriptors);
 }
 
 
 void NODE_NET_SERVER_CONNECTION(node_dtrace_connection_t* conn,
-    const char *remote, int port, int fd) {
+    const char* remote, int port, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[4];
   ETW_WRITE_NET_CONNECTION(descriptors, conn);
   ETW_WRITE_EVENT(NODE_NET_SERVER_CONNECTION_EVENT, descriptors);
 }
 
 
 void NODE_NET_STREAM_END(node_dtrace_connection_t* conn,
-    const char *remote, int port, int fd) {
+    const char* remote, int port, int fd) {
   EVENT_DATA_DESCRIPTOR descriptors[4];
   ETW_WRITE_NET_CONNECTION(descriptors, conn);
   ETW_WRITE_EVENT(NODE_NET_STREAM_END_EVENT, descriptors);