Convert NULL to nullptr

compat/mac/mach-o/getsect.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 19 matching lines @@
 #include <stddef.h>
 
 #include "third_party/apple_cctools/cctools/include/mach-o/getsect.h"
 
 namespace {
 
 // Returns a dlopen() handle to the same library that provides the
 // getsectbyname() function. getsectbyname() is always present in libmacho.
 // getsectiondata() and getsegmentdata() are not always present, but when they
 // are, they’re in the same library as getsectbyname(). If the library cannot
-// be found or a handle to it cannot be returned, returns NULL.
+// be found or a handle to it cannot be returned, returns nullptr.
 void* SystemLibMachOHandle() {
   Dl_info info;
   if (!dladdr(reinterpret_cast<void*>(getsectbyname), &info)) {
-    return NULL;
+    return nullptr;
   }
   return dlopen(info.dli_fname, RTLD_LAZY | RTLD_LOCAL);
 }
 
 // Returns a function pointer to a function in libmacho based on a lookup of
-// that function by symbol name. Returns NULL if libmacho cannot be found or
+// that function by symbol name. Returns nullptr if libmacho cannot be found or
 // opened, or if the named symbol cannot be found in libmacho.
 void* LookUpSystemLibMachOSymbol(const char* symbol) {
   static void* dl_handle = SystemLibMachOHandle();
   if (!dl_handle) {
-    return NULL;
+    return nullptr;
   }
   return dlsym(dl_handle, symbol);
 }
 
 #ifndef __LP64__
 typedef mach_header MachHeader;
 #else
 typedef mach_header_64 MachHeader;
 #endif
 
@@ skipping 32 matching lines @@
           LookUpSystemLibMachOSymbol("getsegmentdata"));
   if (system_getsegmentdata) {
     return system_getsegmentdata(mhp, segname, size);
   }
   return crashpad_getsegmentdata(mhp, segname, size);
 }
 
 }  // extern "C"
 
 #endif  // MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7