18 lines
356 B
C
18 lines
356 B
C
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/*
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* BIRD Library
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*
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* (c) 1998 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_BIRDLIB_H_
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#define _BIRD_BIRDLIB_H_
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/* Ugly structure offset handling macros */
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#define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
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#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
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#endif
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