53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
#ifndef STDDEF_H
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#define STDDEF_H
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <stdint.h>
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/** EFI headers also define NULL */
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#undef NULL
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/** Null pointer */
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#define NULL ( ( void * ) 0 )
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/**
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* Get offset of a field within a structure
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*
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* @v type Structure type
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* @v field Field within structure
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* @ret offset Offset within structure
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*/
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#if defined ( __GNUC__ ) && ( __GNUC__ > 3 )
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#define offsetof( type, field ) __builtin_offsetof ( type, field )
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#else
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#define offsetof( type, field ) ( ( size_t ) &( ( ( type * ) NULL )->field ) )
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#endif
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/**
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* Get containing structure
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*
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* @v ptr Pointer to contained field
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* @v type Containing structure type
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* @v field Field within containing structure
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* @ret container Pointer to containing structure
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*/
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#define container_of( ptr, type, field ) ( { \
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type *__container; \
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const volatile typeof ( __container->field ) *__field = (ptr); \
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__container = ( ( ( void * ) __field ) - \
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offsetof ( type, field ) ); \
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__container; } )
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/* __WCHAR_TYPE__ is defined by gcc and will change if -fshort-wchar is used */
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#ifndef __WCHAR_TYPE__
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#define __WCHAR_TYPE__ uint16_t
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#endif
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#ifndef __WINT_TYPE__
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#define __WINT_TYPE__ int
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#endif
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typedef __WCHAR_TYPE__ wchar_t;
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typedef __WINT_TYPE__ wint_t;
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#endif /* STDDEF_H */
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