[FBcode->GH] [codemod] Use `nullptr` intead of NULL (#8335)

Co-authored-by: Richard Barnes <rbarnes@meta.com>

torchvision/csrc/io/decoder/gpu/decoder.cpp

@@ -59,7 +59,7 @@ void Decoder::release() {
   if (decoder) {
     cuvidDestroyDecoder(decoder);
   }
-  cuCtxPopCurrent(NULL);
+  cuCtxPopCurrent(nullptr);
 }
 
 /* Trigger video decoding.
@@ -100,7 +100,7 @@ int Decoder::handle_picture_decode(CUVIDPICPARAMS* pic_params) {
   check_for_cuda_errors(cuCtxPushCurrent(cu_context), __LINE__, __FILE__);
   check_for_cuda_errors(
       cuvidDecodePicture(decoder, pic_params), __LINE__, __FILE__);
-  check_for_cuda_errors(cuCtxPopCurrent(NULL), __LINE__, __FILE__);
+  check_for_cuda_errors(cuCtxPopCurrent(nullptr), __LINE__, __FILE__);
   return 1;
 }
 
@@ -159,7 +159,7 @@ int Decoder::handle_picture_display(CUVIDPARSERDISPINFO* disp_info) {
 
   check_for_cuda_errors(cuStreamSynchronize(cuvidStream), __LINE__, __FILE__);
   decoded_frames.push(decoded_frame);
-  check_for_cuda_errors(cuCtxPopCurrent(NULL), __LINE__, __FILE__);
+  check_for_cuda_errors(cuCtxPopCurrent(nullptr), __LINE__, __FILE__);
 
   check_for_cuda_errors(
       cuvidUnmapVideoFrame(decoder, source_frame), __LINE__, __FILE__);
@@ -177,7 +177,7 @@ void Decoder::query_hardware(CUVIDEOFORMAT* video_format) {
 
   check_for_cuda_errors(cuCtxPushCurrent(cu_context), __LINE__, __FILE__);
   check_for_cuda_errors(cuvidGetDecoderCaps(&decode_caps), __LINE__, __FILE__);
-  check_for_cuda_errors(cuCtxPopCurrent(NULL), __LINE__, __FILE__);
+  check_for_cuda_errors(cuCtxPopCurrent(nullptr), __LINE__, __FILE__);
 
   if (!decode_caps.bIsSupported) {
     TORCH_CHECK(false, "Codec not supported on this GPU");
@@ -319,7 +319,7 @@ int Decoder::handle_video_sequence(CUVIDEOFORMAT* video_format) {
       cuvidCreateDecoder(&decoder, &video_decode_create_info),
       __LINE__,
       __FILE__);
-  check_for_cuda_errors(cuCtxPopCurrent(NULL), __LINE__, __FILE__);
+  check_for_cuda_errors(cuCtxPopCurrent(nullptr), __LINE__, __FILE__);
   return decode_surface;
 }
 
@@ -389,7 +389,7 @@ int Decoder::reconfigure_decoder(CUVIDEOFORMAT* video_format) {
   check_for_cuda_errors(cuCtxPushCurrent(cu_context), __LINE__, __FILE__);
   check_for_cuda_errors(
       cuvidReconfigureDecoder(decoder, &reconfig_params), __LINE__, __FILE__);
-  check_for_cuda_errors(cuCtxPopCurrent(NULL), __LINE__, __FILE__);
+  check_for_cuda_errors(cuCtxPopCurrent(nullptr), __LINE__, __FILE__);
 
   return decode_surface;
 }

torchvision/csrc/io/image/cpu/encode_png.cpp

@@ -71,7 +71,7 @@ torch::Tensor encode_png(const torch::Tensor& data, int64_t compression_level) {
 
   // Define output buffer
   struct torch_mem_encode buf_info;
-  buf_info.buffer = NULL;
+  buf_info.buffer = nullptr;
   buf_info.size = 0;
 
   /* Establish the setjmp return context for my_error_exit to use. */
@@ -79,15 +79,15 @@ torch::Tensor encode_png(const torch::Tensor& data, int64_t compression_level) {
     /* If we get here, the PNG code has signaled an error.
      * We need to clean up the PNG object and the buffer.
      */
-    if (info_ptr != NULL) {
+    if (info_ptr != nullptr) {
       png_destroy_info_struct(png_write, &info_ptr);
     }
 
-    if (png_write != NULL) {
-      png_destroy_write_struct(&png_write, NULL);
+    if (png_write != nullptr) {
+      png_destroy_write_struct(&png_write, nullptr);
     }
 
-    if (buf_info.buffer != NULL) {
+    if (buf_info.buffer != nullptr) {
       free(buf_info.buffer);
     }
 
@@ -121,12 +121,12 @@ torch::Tensor encode_png(const torch::Tensor& data, int64_t compression_level) {
 
   // Initialize PNG structures
   png_write = png_create_write_struct(
-      PNG_LIBPNG_VER_STRING, &err_ptr, torch_png_error, NULL);
+      PNG_LIBPNG_VER_STRING, &err_ptr, torch_png_error, nullptr);
 
   info_ptr = png_create_info_struct(png_write);
 
   // Define custom buffer output
-  png_set_write_fn(png_write, &buf_info, torch_png_write_data, NULL);
+  png_set_write_fn(png_write, &buf_info, torch_png_write_data, nullptr);
 
   // Set output image information
   auto color_type = channels == 1 ? PNG_COLOR_TYPE_GRAY : PNG_COLOR_TYPE_RGB;

torchvision/csrc/io/image/cpu/read_write_file.cpp

@@ -17,7 +17,7 @@ std::wstring utf8_decode(const std::string& str) {
     return std::wstring();
   }
   int size_needed = MultiByteToWideChar(
-      CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), NULL, 0);
+      CP_UTF8, 0, str.c_str(), static_cast<int>(str.size()), nullptr, 0);
   TORCH_CHECK(size_needed > 0, "Error converting the content to Unicode");
   std::wstring wstrTo(size_needed, 0);
   MultiByteToWideChar(

torchvision/csrc/io/image/image.cpp

@@ -11,7 +11,7 @@
 #ifdef _WIN32
 PyMODINIT_FUNC PyInit_image(void) {
   // No need to do anything.
-  return NULL;
+  return nullptr;
 }
 #endif
 #endif // USE_PYTHON

torchvision/csrc/io/video_reader/video_reader.cpp

@@ -13,7 +13,7 @@
 #ifdef _WIN32
 PyMODINIT_FUNC PyInit_video_reader(void) {
   // No need to do anything.
-  return NULL;
+  return nullptr;
 }
 #endif
 #endif // USE_PYTHONs

torchvision/csrc/vision.cpp

@@ -21,7 +21,7 @@
 #ifdef USE_PYTHON
 PyMODINIT_FUNC PyInit__C(void) {
   // No need to do anything.
-  return NULL;
+  return nullptr;
 }
 #endif // USE_PYTHON
 #endif // !defined(MOBILE) && defined(_WIN32)