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| 1 | /* The stddef.h header defines various variable types and macros.
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| 2 | Many of these definitions also appear in other headers. */
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| 3 | #ifndef _STDDEF_
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| 4 | #define _STDDEF_
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| 5 |
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| 6 | /* Types */
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| 7 | typedef signed long int ptrdiff_t;
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| 8 |
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| 9 | typedef unsigned long int size_t;
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| 10 |
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| 11 | typedef struct max_align_t max_align_t;
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| 12 |
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| 13 | typedef long int wchar_t;
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| 14 |
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| 15 | /* Macros */
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| 16 | #ifndef NULL
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| 17 | #define NULL ((void*)0)
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| 18 | #endif
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| 19 |
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| 20 | #define offsetof(st, m) ((size_t) ( (char *)&((st *)(0))->m - (char *)0 ))
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| 21 |
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| 22 | #endif
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