Commit | Line | Data |
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dd3b648e RP |
1 | #ifndef _STDDEF_H |
2 | #define _STDDEF_H | |
3 | ||
4 | /* Signed type of difference of two pointers. */ | |
5 | ||
6 | typedef long ptrdiff_t; | |
7 | ||
8 | /* Unsigned type of `sizeof' something. */ | |
9 | ||
10 | #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */ | |
11 | #define _SIZE_T | |
12 | typedef unsigned long size_t; | |
13 | #endif /* _SIZE_T */ | |
14 | ||
15 | /* A null pointer constant. */ | |
16 | ||
17 | #undef NULL /* in case <stdio.h> has defined it. */ | |
18 | #define NULL 0 | |
19 | ||
20 | /* Offset of member MEMBER in a struct of type TYPE. */ | |
21 | ||
22 | #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) | |
23 | ||
24 | #endif /* _STDDEF_H */ |