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r7325@Kushana: nickm | 2006-08-10 23:37:31 -0700

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Use gcc offsetof where available.


svn:r7021
This commit is contained in:
Nick Mathewson 2006-08-11 07:09:28 +00:00
parent 09a895e222
commit 4eddbcf262
1 changed files with 6 additions and 2 deletions
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6
src/common/util.h
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@ -91,8 +91,12 @@ extern int dmalloc_free(const char *file, const int line, void *pnt,
#define tor_memdup(s, n) _tor_memdup(s, n DMALLOC_ARGS)
/** Return the offset of <b>member</b> within the type <b>tp</b>, in bytes */
#define STRUCT_OFFSET(tp, member) \
#ifdef __GNUC__
#define STRUCT_OFFSET(tp, member) __builtin_offsetof(tp, member)
#else
#define STRUCT_OFFSET(tp, member) \
((off_t) (((char*)&((tp*)0)->member)-(char*)0))
#endif
/* String manipulation */
#define HEX_CHARACTERS "0123456789ABCDEFabcdef"