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BSD 4.3

/*	struct.h	4.1	83/05/03	*/

/*
 * access to information relating to the fields of a structure
 */

#define	fldoff(str, fld)	((int)&(((struct str *)0)->fld))
#define	fldsiz(str, fld)	(sizeof(((struct str *)0)->fld))
#define	strbase(str, ptr, fld)	((struct str *)((char *)(ptr)-fldoff(str, fld)))

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