summaryrefslogtreecommitdiff
path: root/include/libHX/defs.h
diff options
context:
space:
mode:
authorJörg Frings-Fürst <debian@jff-webhosting.net>2023-12-17 14:18:48 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2023-12-17 14:18:48 +0100
commiteece9692d707ccb20356ec06955f8308c4e59ca7 (patch)
tree55186434884960d25d11736c8f846876d568fa08 /include/libHX/defs.h
parent987942a206ef0f2342bf81d5de6432c6af42b7e7 (diff)
New upstream version 4.19upstream/4.19
Diffstat (limited to 'include/libHX/defs.h')
-rw-r--r--include/libHX/defs.h115
1 files changed, 1 insertions, 114 deletions
diff --git a/include/libHX/defs.h b/include/libHX/defs.h
index 9d17019..31c818f 100644
--- a/include/libHX/defs.h
+++ b/include/libHX/defs.h
@@ -1,6 +1,7 @@
#ifndef _LIBHX_DEFS_H
#define _LIBHX_DEFS_H 1
+#include <libHX/cast.h>
#ifdef __cplusplus
# define HXsizeof_member(type, member) sizeof(type::member)
# if __cplusplus >= 201100L
@@ -13,123 +14,9 @@
# include <type_traits>
# define containerof(var, T, member) reinterpret_cast<std::conditional<std::is_const<std::remove_pointer<decltype(var)>::type>::value, std::add_const<T>::type, T>::type *>(reinterpret_cast<std::conditional<std::is_const<std::remove_pointer<decltype(var)>::type>::value, const char, char>::type *>(var) - offsetof(T, member))
# endif
-# ifndef static_cast
-# define static_cast(T, x) static_cast<T>(x)
-# endif
-
-template<typename new_type>
-static __inline__ new_type signed_cast(const char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
-
-template<typename new_type>
-static __inline__ new_type signed_cast(const signed char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
-
-template<typename new_type>
-static __inline__ new_type signed_cast(const unsigned char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
-
-template<typename new_type>
-static __inline__ new_type signed_cast(char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
-
-template<typename new_type>
-static __inline__ new_type signed_cast(signed char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
-
-template<typename new_type>
-static __inline__ new_type signed_cast(unsigned char *expr)
-{
- return reinterpret_cast<new_type>(expr);
-}
#else
# define HXsizeof_member(type, member) sizeof(((type *)NULL)->member)
# define HXtypeof_member(type, member) __typeof__(((type *)NULL)->member)
- /* N.B. signed_cast<> does not exist in C++. */
-# define __signed_cast_compatible(a, b) \
- __builtin_choose_expr( \
- __builtin_types_compatible_p(b, const char *) || \
- __builtin_types_compatible_p(b, const signed char *) || \
- __builtin_types_compatible_p(b, const unsigned char *), \
- /* if src has a const qualifier */ \
- __builtin_types_compatible_p(a, const char *) || \
- __builtin_types_compatible_p(a, const signed char *) || \
- __builtin_types_compatible_p(a, const unsigned char *), \
- /* and if it has none... */ \
- __builtin_types_compatible_p(a, const char *) || \
- __builtin_types_compatible_p(a, const signed char *) || \
- __builtin_types_compatible_p(a, const unsigned char *) || \
- __builtin_types_compatible_p(a, char *) || \
- __builtin_types_compatible_p(a, signed char *) || \
- __builtin_types_compatible_p(a, unsigned char *) \
- )
-
-# if defined(__GNUC__) && !defined(__clang__) && !defined(signed_cast)
-# define signed_cast(type, expr) ({ \
- BUILD_BUG_ON(!__signed_cast_compatible(__typeof__(type), __typeof__(expr))); \
- (type)(expr); \
- })
-# endif
-# if defined(__GNUC__) && !defined(__clang__) && !defined(static_cast)
-# define static_cast(type, expr) \
- ((struct { type x; }){(expr)}.x)
-# endif
-# if defined(__GNUC__) && !defined(__clang__) && !defined(const_cast1)
- /*
- * The idea starts with (in abstract notation)
- * typeof deref typeof expr
- * To deref something, we need an object, which we can get by
- * creating a temporary aggregate, such as a union, of which
- * the member is accessed and dereferenced.
- * *(union { __typeof__(expr) x; }){init}.x
- * union has two nice properties:
- * - with an additional dummy member, we do not have to
- * initialize x according to its type, which, if expr is
- * an array type, may want extra braces.
- * - and with that dummy member, we also avoid the ugly
- * "literal 0 is implicitly convertible to a pointer".
- * Unfortunately, this all requires C99 compound initializers.
- * That's ok - gcc and clang only treat it as a warning even
- * under strict C89 - and if you still force strict C89 on
- * yourself, you have a lot to answer for either way.
- */
-# define __const_cast_strip(ptrs, expr) \
- __typeof__(ptrs(union { int z; __typeof__(expr) x; }){0}.x)
-# define __const_cast_p(ptrs, new_type, expr) ((new_type)( \
- (expr) + \
- BUILD_BUG_ON_EXPR(!__builtin_types_compatible_p(__const_cast_strip(ptrs, expr), __const_cast_strip(ptrs, new_type))) \
- ))
-# define const_cast1(new_type, expr) __const_cast_p(*, new_type, expr)
-# define const_cast2(new_type, expr) __const_cast_p(**, new_type, expr)
-# define const_cast3(new_type, expr) __const_cast_p(***, new_type, expr)
-# endif
-# ifndef signed_cast
-# define signed_cast(type, expr) ((type)(expr))
-# endif
-# ifndef static_cast
-# define static_cast(type, expr) ((type)(expr))
-# endif
-# ifndef const_cast
-# define const_cast(type, expr) ((type)(expr))
-# endif
-# ifndef const_cast1
-# define const_cast1(type, expr) ((type)(expr))
-# define const_cast2(type, expr) ((type)(expr))
-# define const_cast3(type, expr) ((type)(expr))
-# endif
-# ifndef reinterpret_cast
-# define reinterpret_cast(type, expr) ((type)(expr))
-# endif
# ifndef containerof
# include <stddef.h>
# define containerof(var, type, member) reinterpret_cast(type *, \