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define NULL as nullptr when used in C++11 or later

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This should be safer for casting and more compatible with existing code
bases that wrongly assume it must be defined as a pointer.
This commit is contained in:
Ismael Luceno 2021-08-15 17:51:57 +02:00 committed by Rich Felker
parent 8274aaaaa1
commit 98e688a9da
8 changed files with 24 additions and 8 deletions
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4
include/locale.h
View File

@ -7,7 +7,9 @@ extern "C" {
#include <features.h> #include <features.h>
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/stddef.h
View File

@ -1,7 +1,9 @@
#ifndef _STDDEF_H #ifndef _STDDEF_H
#define _STDDEF_H #define _STDDEF_H
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/stdio.h
View File

@ -25,7 +25,9 @@ extern "C" {
#include <bits/alltypes.h> #include <bits/alltypes.h>
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/stdlib.h
View File

@ -7,7 +7,9 @@ extern "C" {
#include <features.h> #include <features.h>
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/string.h
View File

@ -7,7 +7,9 @@ extern "C" {
#include <features.h> #include <features.h>
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/time.h
View File

@ -7,7 +7,9 @@ extern "C" {
#include <features.h> #include <features.h>
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/unistd.h
View File

@ -15,7 +15,9 @@ extern "C" {
#define SEEK_CUR 1 #define SEEK_CUR 1
#define SEEK_END 2 #define SEEK_END 2
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)

4
include/wchar.h
View File

@ -38,7 +38,9 @@ extern "C" {
#define WCHAR_MIN (-1-0x7fffffff+L'\0') #define WCHAR_MIN (-1-0x7fffffff+L'\0')
#endif #endif
#ifdef __cplusplus #if __cplusplus >= 201103L
#define NULL nullptr
#elif defined(__cplusplus)
#define NULL 0L #define NULL 0L
#else #else
#define NULL ((void*)0) #define NULL ((void*)0)