[clang-tidy] NO.12 enable modernize-use-nullptr check

.clang-tidy

@@ -184,7 +184,7 @@ modernize-redundant-void-arg,
 -modernize-use-equals-default,
 -modernize-use-equals-delete,
 -modernize-use-noexcept,
--modernize-use-nullptr,
+modernize-use-nullptr,
 modernize-use-override,
 -modernize-use-transparent-functors,
 -modernize-use-uncaught-exceptions,

paddle/fluid/framework/data_feed.cc

@@ -59,8 +59,8 @@ class BufferedLineFileReader {
   int read_lines(T* reader, LineFunc func, int skip_lines) {
     int lines = 0;
     size_t ret = 0;
-    char* ptr = NULL;
-    char* eol = NULL;
+    char* ptr = nullptr;
+    char* eol = nullptr;
     total_len_ = 0;
     error_line_ = 0;
 
@@ -70,7 +70,7 @@ class BufferedLineFileReader {
       total_len_ += ret;
       ptr = buff_;
       eol = reinterpret_cast<char*>(memchr(ptr, '\n', ret));
-      while (eol != NULL) {
+      while (eol != nullptr) {
         int size = static_cast<int>((eol - ptr) + 1);
         x.append(ptr, size - 1);
         ++lines;
@@ -1106,13 +1106,13 @@ void MultiSlotInMemoryDataFeed::GetMsgFromLogKey(const std::string& log_key,
                                                  uint32_t* cmatch,
                                                  uint32_t* rank) {
   std::string searchid_str = log_key.substr(16, 16);
-  *search_id = (uint64_t)strtoull(searchid_str.c_str(), NULL, 16);
+  *search_id = (uint64_t)strtoull(searchid_str.c_str(), nullptr, 16);
 
   std::string cmatch_str = log_key.substr(11, 3);
-  *cmatch = (uint32_t)strtoul(cmatch_str.c_str(), NULL, 16);
+  *cmatch = (uint32_t)strtoul(cmatch_str.c_str(), nullptr, 16);
 
   std::string rank_str = log_key.substr(14, 2);
-  *rank = (uint32_t)strtoul(rank_str.c_str(), NULL, 16);
+  *rank = (uint32_t)strtoul(rank_str.c_str(), nullptr, 16);
 }
 
 int MultiSlotInMemoryDataFeed::ParseInstanceFromSo(
@@ -1657,8 +1657,8 @@ bool MultiSlotFileInstantDataFeed::Preprocess(const std::string& filename) {
   fstat(fd_, &sb);
   end_ = static_cast<size_t>(sb.st_size);
 
-  buffer_ =
-      reinterpret_cast<char*>(mmap(NULL, end_, PROT_READ, MAP_PRIVATE, fd_, 0));
+  buffer_ = reinterpret_cast<char*>(
+      mmap(nullptr, end_, PROT_READ, MAP_PRIVATE, fd_, 0));
   PADDLE_ENFORCE_NE(
       buffer_,
       MAP_FAILED,
@@ -2401,11 +2401,12 @@ static void parser_log_key(const std::string& log_key,
                            uint32_t* cmatch,
                            uint32_t* rank) {
   std::string searchid_str = log_key.substr(16, 16);
-  *search_id = static_cast<uint64_t>(strtoull(searchid_str.c_str(), NULL, 16));
+  *search_id =
+      static_cast<uint64_t>(strtoull(searchid_str.c_str(), nullptr, 16));
   std::string cmatch_str = log_key.substr(11, 3);
-  *cmatch = static_cast<uint32_t>(strtoul(cmatch_str.c_str(), NULL, 16));
+  *cmatch = static_cast<uint32_t>(strtoul(cmatch_str.c_str(), nullptr, 16));
   std::string rank_str = log_key.substr(14, 2);
-  *rank = static_cast<uint32_t>(strtoul(rank_str.c_str(), NULL, 16));
+  *rank = static_cast<uint32_t>(strtoul(rank_str.c_str(), nullptr, 16));
 }
 
 bool SlotRecordInMemoryDataFeed::ParseOneInstance(const std::string& line,

paddle/fluid/framework/io/crypto/aes_cipher.cc

@@ -187,38 +187,42 @@ void AESCipher::BuildCipher(
     m_cipher->reset(new CryptoPP::ECB_Mode<CryptoPP::AES>::Encryption);
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         CryptoPP::BlockPaddingSchemeDef::PKCS_PADDING));
   } else if (aes_cipher_name_ == "AES_ECB_PKCSPadding" && !for_encrypt) {
     m_cipher->reset(new CryptoPP::ECB_Mode<CryptoPP::AES>::Decryption);
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         CryptoPP::BlockPaddingSchemeDef::PKCS_PADDING));
   } else if (aes_cipher_name_ == "AES_CBC_PKCSPadding" && for_encrypt) {
     m_cipher->reset(new CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption);
     *need_iv = true;
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         CryptoPP::BlockPaddingSchemeDef::PKCS_PADDING));
   } else if (aes_cipher_name_ == "AES_CBC_PKCSPadding" && !for_encrypt) {
     m_cipher->reset(new CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption);
     *need_iv = true;
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         CryptoPP::BlockPaddingSchemeDef::PKCS_PADDING));
   } else if (aes_cipher_name_ == "AES_CTR_NoPadding" && for_encrypt) {
     m_cipher->reset(new CryptoPP::CTR_Mode<CryptoPP::AES>::Encryption);
     *need_iv = true;
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
-        *(*m_cipher).get(), NULL, CryptoPP::BlockPaddingSchemeDef::NO_PADDING));
+        *(*m_cipher).get(),
+        nullptr,
+        CryptoPP::BlockPaddingSchemeDef::NO_PADDING));
   } else if (aes_cipher_name_ == "AES_CTR_NoPadding" && !for_encrypt) {
     m_cipher->reset(new CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption);
     *need_iv = true;
     m_filter->reset(new CryptoPP::StreamTransformationFilter(
-        *(*m_cipher).get(), NULL, CryptoPP::BlockPaddingSchemeDef::NO_PADDING));
+        *(*m_cipher).get(),
+        nullptr,
+        CryptoPP::BlockPaddingSchemeDef::NO_PADDING));
   } else {
     PADDLE_THROW(paddle::platform::errors::Unimplemented(
         "Create cipher error. "
@@ -236,7 +240,7 @@ void AESCipher::BuildAuthEncCipher(
     *need_iv = true;
     m_filter->reset(new CryptoPP::AuthenticatedEncryptionFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         false,
         tag_size_ / 8,
         CryptoPP::DEFAULT_CHANNEL,
@@ -258,7 +262,7 @@ void AESCipher::BuildAuthDecCipher(
     *need_iv = true;
     m_filter->reset(new CryptoPP::AuthenticatedDecryptionFilter(
         *(*m_cipher).get(),
-        NULL,
+        nullptr,
         CryptoPP::AuthenticatedDecryptionFilter::DEFAULT_FLAGS,
         tag_size_ / 8,
         CryptoPP::BlockPaddingSchemeDef::NO_PADDING));

paddle/fluid/framework/io/fs.cc

@@ -60,7 +60,7 @@ static std::shared_ptr<FILE> fs_open_internal(const std::string& path,
                                               bool is_pipe,
                                               const std::string& mode,
                                               size_t buffer_size,
-                                              int* err_no = 0) {
+                                              int* err_no = nullptr) {
   std::shared_ptr<FILE> fp = nullptr;
 
   if (!is_pipe) {

paddle/fluid/framework/io/shell.cc

@@ -82,7 +82,7 @@ static int close_open_fds_internal() {
       break;
     }
 
-    linux_dirent* entry = NULL;
+    linux_dirent* entry = nullptr;
 
     for (int offset = 0; offset < bytes; offset += entry->d_reclen) {
       entry = reinterpret_cast<linux_dirent*>(buffer + offset);
@@ -140,9 +140,9 @@ static int shell_popen_fork_internal(const char* real_cmd,
   close_open_fds_internal();
 
 #if defined(PADDLE_WITH_MUSL)
-  PCHECK(execl("/bin/sh", "sh", "-c", real_cmd, NULL) >= 0);
+  PCHECK(execl("/bin/sh", "sh", "-c", real_cmd, nullptr) >= 0);
 #else
-  PCHECK(execl("/bin/bash", "bash", "-c", real_cmd, NULL) >= 0);
+  PCHECK(execl("/bin/bash", "bash", "-c", real_cmd, nullptr) >= 0);
 #endif
   // Note: just for compilation. the child don't run this line.
   _exit(0);
@@ -179,7 +179,7 @@ std::shared_ptr<FILE> shell_popen(const std::string& cmd,
   bool do_write = mode == "w";
   if (!(do_read || do_write)) {
     *err_no = -1;
-    return NULL;
+    return nullptr;
   }
 
   VLOG(3) << "Opening pipe[" << cmd << "] with mode[" << mode << "]";
@@ -189,7 +189,7 @@ std::shared_ptr<FILE> shell_popen(const std::string& cmd,
   int pipe_fds[2];
   if (pipe(pipe_fds) != 0) {
     *err_no = -1;
-    return NULL;
+    return nullptr;
   }
   int parent_end = 0;
   int child_end = 0;
@@ -212,11 +212,11 @@ std::shared_ptr<FILE> shell_popen(const std::string& cmd,
 
   close(child_end);
 
-  FILE* fp = NULL;
-  if ((fp = fdopen(parent_end, mode.c_str())) == NULL) {
+  FILE* fp = nullptr;
+  if ((fp = fdopen(parent_end, mode.c_str())) == nullptr) {
     *err_no = -1;
     signal(SIGCHLD, old_handler);
-    return NULL;
+    return nullptr;
   }
 
   return {fp, [cmd, child_pid, old_handler, err_no, status](FILE* fp) {
@@ -281,7 +281,7 @@ static int shell_p2open_fork_internal(const char* real_cmd,
   }
 
   close_open_fds_internal();
-  if (execl("/bin/sh", "sh", "-c", real_cmd, NULL) < 0) {
+  if (execl("/bin/sh", "sh", "-c", real_cmd, nullptr) < 0) {
     return -1;
   }
   exit(127);
@@ -302,10 +302,10 @@ std::pair<std::shared_ptr<FILE>, std::shared_ptr<FILE>> shell_p2open(
   int pipein_fds[2];
   int pipeout_fds[2];
   if (pipe(pipein_fds) != 0) {
-    return {NULL, NULL};
+    return {nullptr, nullptr};
   }
   if (pipe(pipeout_fds) != 0) {
-    return {NULL, NULL};
+    return {nullptr, nullptr};
   }
 
   int child_pid =
@@ -317,7 +317,7 @@ std::pair<std::shared_ptr<FILE>, std::shared_ptr<FILE>> shell_p2open(
   fcntl(pipeout_fds[1], F_SETFD, FD_CLOEXEC);
 
   std::shared_ptr<int> child_life = {
-      NULL, [child_pid, cmd](void*) {
+      nullptr, [child_pid, cmd](void*) {
         if (shell_verbose()) {
           LOG(INFO) << "Closing bidirectional pipe[" << cmd << "]";
         }
@@ -340,9 +340,9 @@ std::pair<std::shared_ptr<FILE>, std::shared_ptr<FILE>> shell_p2open(
       }};
 
   FILE* in_fp;
-  PCHECK((in_fp = fdopen(pipein_fds[0], "r")) != NULL);
+  PCHECK((in_fp = fdopen(pipein_fds[0], "r")) != nullptr);
   FILE* out_fp;
-  PCHECK((out_fp = fdopen(pipeout_fds[1], "w")) != NULL);
+  PCHECK((out_fp = fdopen(pipeout_fds[1], "w")) != nullptr);
   return {{in_fp, [child_life](FILE* fp) { PCHECK(fclose(fp) == 0); }},
           {out_fp, [child_life](FILE* fp) { PCHECK(fclose(fp) == 0); }}};
 #endif

paddle/fluid/framework/ir/multi_devices_graph_pass/fuse_all_reduce_op_pass.cc

@@ -291,7 +291,7 @@ class FuseAllReduceOpPass : public ir::Pass {
       const platform::BKCLCommunicator *multi_bkcl_ctxs,
 #endif
       ir::Graph *result) const {
-    details::FusedAllReduceOpHandle *op_handle = NULL;
+    details::FusedAllReduceOpHandle *op_handle = nullptr;
     if (is_grad_merge) {
 #if defined(PADDLE_WITH_NCCL) || defined(PADDLE_WITH_RCCL)
       op_handle = new details::FusedGradMergeAllReduceOpHandle(

paddle/fluid/inference/capi_exp/pd_config.cc

@@ -55,7 +55,7 @@ __pd_give PD_Config* PD_ConfigCreate() {
 }
 
 void PD_ConfigDestroy(__pd_take PD_Config* pd_config) {
-  if (pd_config != NULL) {
+  if (pd_config != nullptr) {
     delete reinterpret_cast<Config*>(pd_config);
   }
 }

paddle/fluid/inference/capi_exp/pd_predictor.cc

@@ -68,7 +68,7 @@ __pd_give PD_IOInfos* PD_PredictorGetInputInfos(
 
   PD_IOInfos* input_infos = new PD_IOInfos;
   input_infos->size = names.size();
-  input_infos->io_info = names.empty() ? NULL : new PD_IOInfo*[names.size()];
+  input_infos->io_info = names.empty() ? nullptr : new PD_IOInfo*[names.size()];
   for (size_t i = 0; i < names.size(); i++) {
     const std::string& name = names[i];
     input_infos->io_info[i] = new PD_IOInfo;
@@ -99,7 +99,8 @@ __pd_give PD_IOInfos* PD_PredictorGetOutputInfos(
 
   PD_IOInfos* output_infos = new PD_IOInfos;
   output_infos->size = names.size();
-  output_infos->io_info = names.empty() ? NULL : new PD_IOInfo*[names.size()];
+  output_infos->io_info =
+      names.empty() ? nullptr : new PD_IOInfo*[names.size()];
   for (size_t i = 0; i < names.size(); i++) {
     const std::string& name = names[i];
     output_infos->io_info[i] = new PD_IOInfo;