[libc++][NFC] Replace uses of NULL by nullptr (llvm#108847)

Closes llvm#108741

libcxx/include/__locale_dir/locale_base_api/ibm.h

@@ -82,7 +82,7 @@ strtoull_l(const char* __nptr, char** __endptr, int __base, locale_t locale) {
 inline _LIBCPP_HIDE_FROM_ABI
 _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 2, 0) int vasprintf(char** strp, const char* fmt, va_list ap) {
   const size_t buff_size = 256;
-  if ((*strp = (char*)malloc(buff_size)) == NULL) {
+  if ((*strp = (char*)malloc(buff_size)) == nullptr) {
     return -1;
   }
 
@@ -97,7 +97,7 @@ _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 2, 0) int vasprintf(char** strp, const char
   va_end(ap_copy);
 
   if ((size_t)str_size >= buff_size) {
-    if ((*strp = (char*)realloc(*strp, str_size + 1)) == NULL) {
+    if ((*strp = (char*)realloc(*strp, str_size + 1)) == nullptr) {
       return -1;
     }
     str_size = vsnprintf(*strp, str_size + 1, fmt, ap);

libcxx/include/__support/xlocale/__nop_locale_mgmt.h

@@ -15,13 +15,13 @@
 // Patch over lack of extended locale support
 typedef void* locale_t;
 
-inline _LIBCPP_HIDE_FROM_ABI locale_t duplocale(locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t duplocale(locale_t) { return nullptr; }
 
 inline _LIBCPP_HIDE_FROM_ABI void freelocale(locale_t) {}
 
-inline _LIBCPP_HIDE_FROM_ABI locale_t newlocale(int, const char*, locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t newlocale(int, const char*, locale_t) { return nullptr; }
 
-inline _LIBCPP_HIDE_FROM_ABI locale_t uselocale(locale_t) { return NULL; }
+inline _LIBCPP_HIDE_FROM_ABI locale_t uselocale(locale_t) { return nullptr; }
 
 #define LC_COLLATE_MASK (1 << LC_COLLATE)
 #define LC_CTYPE_MASK (1 << LC_CTYPE)

libcxx/src/atomic.cpp

@@ -94,11 +94,11 @@ static void __libcpp_platform_wake_by_address(__cxx_atomic_contention_t const vo
 
 static void
 __libcpp_platform_wait_on_address(__cxx_atomic_contention_t const volatile* __ptr, __cxx_contention_t __val) {
-  _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), UMTX_OP_WAIT, __val, NULL, NULL);
+  _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), UMTX_OP_WAIT, __val, nullptr, nullptr);
 }
 
 static void __libcpp_platform_wake_by_address(__cxx_atomic_contention_t const volatile* __ptr, bool __notify_one) {
-  _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), UMTX_OP_WAKE, __notify_one ? 1 : INT_MAX, NULL, NULL);
+  _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), UMTX_OP_WAKE, __notify_one ? 1 : INT_MAX, nullptr, nullptr);
 }
 
 #else // <- Add other operating systems here

libcxx/src/locale.cpp

@@ -1004,7 +1004,7 @@ const ctype<char>::mask* ctype<char>::classic_table() noexcept {
 #    warning ctype<char>::classic_table() is not implemented
   printf("ctype<char>::classic_table() is not implemented\n");
   abort();
-  return NULL;
+  return nullptr;
 #  endif
 }
 #endif

libcxx/src/support/ibm/mbsnrtowcs.cpp

@@ -48,7 +48,7 @@ _LIBCPP_EXPORTED_FROM_ABI size_t mbsnrtowcs(
     size_t dest_remaining   = max_dest_chars - dest_converted;
 
     if (dst == nullptr) {
-      result = mbrtowc(NULL, *src + source_converted, source_remaining, ps);
+      result = mbrtowc(nullptr, *src + source_converted, source_remaining, ps);
     } else if (dest_remaining >= source_remaining) {
       // dst has enough space to translate in-place.
       result = mbrtowc(dst + dest_converted, *src + source_converted, source_remaining, ps);
@@ -86,7 +86,7 @@ _LIBCPP_EXPORTED_FROM_ABI size_t mbsnrtowcs(
 
   if (dst) {
     if (result == terminated_sequence)
-      *src = NULL;
+      *src = nullptr;
     else
       *src += source_converted;
   }

libcxx/src/support/ibm/wcsnrtombs.cpp

@@ -41,7 +41,7 @@ _LIBCPP_EXPORTED_FROM_ABI size_t wcsnrtombs(
     size_t dest_remaining = dst_size_bytes - dest_converted;
 
     if (dst == nullptr) {
-      result = wcrtomb(NULL, c, ps);
+      result = wcrtomb(nullptr, c, ps);
     } else if (dest_remaining >= static_cast<size_t>(MB_CUR_MAX)) {
       // dst has enough space to translate in-place.
       result = wcrtomb(dst + dest_converted, c, ps);
@@ -82,7 +82,7 @@ _LIBCPP_EXPORTED_FROM_ABI size_t wcsnrtombs(
 
     if (c == L'\0') {
       if (dst)
-        *src = NULL;
+        *src = nullptr;
       return dest_converted;
     }
   }

libcxx/src/support/ibm/xlocale_zos.cpp

@@ -20,12 +20,12 @@ locale_t newlocale(int category_mask, const char* locale, locale_t base) {
   std::string current_loc_name(setlocale(LC_ALL, 0));
 
   // Check for errors.
-  if (category_mask == LC_ALL_MASK && setlocale(LC_ALL, locale) == NULL) {
+  if (category_mask == LC_ALL_MASK && setlocale(LC_ALL, locale) == nullptr) {
     errno = EINVAL;
     return (locale_t)0;
   } else {
     for (int _Cat = 0; _Cat <= _LC_MAX; ++_Cat) {
-      if ((_CATMASK(_Cat) & category_mask) != 0 && setlocale(_Cat, locale) == NULL) {
+      if ((_CATMASK(_Cat) & category_mask) != 0 && setlocale(_Cat, locale) == nullptr) {
         setlocale(LC_ALL, current_loc_name.c_str());
         errno = EINVAL;
         return (locale_t)0;
@@ -74,12 +74,12 @@ locale_t uselocale(locale_t newloc) {
   if (newloc) {
     // Set locales and check for errors.
     bool is_error =
-        (newloc->category_mask & LC_COLLATE_MASK && setlocale(LC_COLLATE, newloc->lc_collate.c_str()) == NULL) ||
-        (newloc->category_mask & LC_CTYPE_MASK && setlocale(LC_CTYPE, newloc->lc_ctype.c_str()) == NULL) ||
-        (newloc->category_mask & LC_MONETARY_MASK && setlocale(LC_MONETARY, newloc->lc_monetary.c_str()) == NULL) ||
-        (newloc->category_mask & LC_NUMERIC_MASK && setlocale(LC_NUMERIC, newloc->lc_numeric.c_str()) == NULL) ||
-        (newloc->category_mask & LC_TIME_MASK && setlocale(LC_TIME, newloc->lc_time.c_str()) == NULL) ||
-        (newloc->category_mask & LC_MESSAGES_MASK && setlocale(LC_MESSAGES, newloc->lc_messages.c_str()) == NULL);
+        (newloc->category_mask & LC_COLLATE_MASK && setlocale(LC_COLLATE, newloc->lc_collate.c_str()) == nullptr) ||
+        (newloc->category_mask & LC_CTYPE_MASK && setlocale(LC_CTYPE, newloc->lc_ctype.c_str()) == nullptr) ||
+        (newloc->category_mask & LC_MONETARY_MASK && setlocale(LC_MONETARY, newloc->lc_monetary.c_str()) == nullptr) ||
+        (newloc->category_mask & LC_NUMERIC_MASK && setlocale(LC_NUMERIC, newloc->lc_numeric.c_str()) == nullptr) ||
+        (newloc->category_mask & LC_TIME_MASK && setlocale(LC_TIME, newloc->lc_time.c_str()) == nullptr) ||
+        (newloc->category_mask & LC_MESSAGES_MASK && setlocale(LC_MESSAGES, newloc->lc_messages.c_str()) == nullptr);
 
     if (is_error) {
       setlocale(LC_ALL, current_loc_name.c_str());

libcxx/src/support/win32/support.cpp

@@ -17,13 +17,13 @@
 // a pointer to a malloc'd string in *sptr.
 // If return >= 0, use free to delete *sptr.
 int __libcpp_vasprintf(char** sptr, const char* __restrict format, va_list ap) {
-  *sptr = NULL;
+  *sptr = nullptr;
   // Query the count required.
   va_list ap_copy;
   va_copy(ap_copy, ap);
   _LIBCPP_DIAGNOSTIC_PUSH
   _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
-  int count = vsnprintf(NULL, 0, format, ap_copy);
+  int count = vsnprintf(nullptr, 0, format, ap_copy);
   _LIBCPP_DIAGNOSTIC_POP
   va_end(ap_copy);
   if (count < 0)
@@ -81,7 +81,7 @@ size_t mbsnrtowcs(wchar_t* __restrict dst,
     // if result > 0, it's the size in bytes of that character.
     // othewise if result is zero it indicates the null character has been found.
     // otherwise it's an error and errno may be set.
-    size_t char_size = mbrtowc(dst ? dst + dest_converted : NULL, *src + source_converted, source_remaining, ps);
+    size_t char_size = mbrtowc(dst ? dst + dest_converted : nullptr, *src + source_converted, source_remaining, ps);
     // Don't do anything to change errno from here on.
     if (char_size > 0) {
       source_remaining -= char_size;
@@ -95,7 +95,7 @@ size_t mbsnrtowcs(wchar_t* __restrict dst,
   }
   if (dst) {
     if (have_result && result == terminated_sequence)
-      *src = NULL;
+      *src = nullptr;
     else
       *src += source_converted;
   }
@@ -141,7 +141,7 @@ size_t wcsnrtombs(char* __restrict dst,
     if (dst)
       result = wcrtomb_s(&char_size, dst + dest_converted, dest_remaining, c, ps);
     else
-      result = wcrtomb_s(&char_size, NULL, 0, c, ps);
+      result = wcrtomb_s(&char_size, nullptr, 0, c, ps);
     // If result is zero there is no error and char_size contains the
     // size of the multi-byte-sequence converted.
     // Otherwise result indicates an errno type error.
@@ -161,7 +161,7 @@ size_t wcsnrtombs(char* __restrict dst,
   }
   if (dst) {
     if (terminator_found)
-      *src = NULL;
+      *src = nullptr;
     else
       *src = *src + source_converted;
   }

libcxx/src/support/win32/thread_win32.cpp

@@ -129,7 +129,7 @@ __libcpp_init_once_execute_once_thunk(PINIT_ONCE __init_once, PVOID __parameter,
 
 int __libcpp_execute_once(__libcpp_exec_once_flag* __flag, void (*__init_routine)(void)) {
   if (!InitOnceExecuteOnce(
-          (PINIT_ONCE)__flag, __libcpp_init_once_execute_once_thunk, reinterpret_cast<void*>(__init_routine), NULL))
+          (PINIT_ONCE)__flag, __libcpp_init_once_execute_once_thunk, reinterpret_cast<void*>(__init_routine), nullptr))
     return GetLastError();
   return 0;
 }