/*
 *      TAG values for SocketBaseTagList()
 *      Copyright © 1996 Oregon Research
 */

#include <utility/tagitem.h>

/*
 * Argument passing convention (bit 15)
 */
#define SBTF_REF 0x8000		/* 0x0000 == VAL */

/*
 * Code (bits 1-14)
 */
#define SBTB_CODE 1
#define SBTS_CODE 0x3FFF
#define SBTM_CODE(tag) (((UWORD)(tag) >> SBTB_CODE) & SBTS_CODE)

/* 
 * Direction (bit 0)
 */
#define SBTF_SET  0x1		/* 0 == GET */

/*
 * Macros to set things up
 * TAG_USER (bit 31) is set to be compatible with tagitem.h
 * conventions.
 */
#define SBTM_GETREF(code) \
  (TAG_USER | SBTF_REF | (((code) & SBTS_CODE) << SBTB_CODE))
#define SBTM_GETVAL(code) \
  (TAG_USER | (((code) & SBTS_CODE) << SBTB_CODE))
#define SBTM_SETREF(code) \
  (TAG_USER | SBTF_REF | (((code) & SBTS_CODE) << SBTB_CODE) | SBTF_SET)
#define SBTM_SETVAL(code) \
  (TAG_USER | (((code) & SBTS_CODE) << SBTB_CODE) | SBTF_SET)

/*
 * Tag code definitions. These codes are used with one of the above macros.
 * All arguments are ULONG's or pointers (PTR suffix).
 * NOTE: Tag code 0 is not used (see utility/tagitem.h).
 */

/* signal masks */
#define SBTC_BREAKMASK		1
#define SBTC_SIGIOMASK		2
#define SBTC_SIGURGMASK		3

/* error code handling */
#define SBTC_ERRNO		6
#define SBTC_HERRNO		7

/*
 * The argument of following error string tags is a ULONG,
 * where the error number is stored. On return the string pointer is 
 * returned on this same ULONG. (get only)
 *
 * NOTE: error numbers defined in <sys/errors.h> are negative and must be
 * negated (turned to positive) before passing to the SocketBaseTagList().
 */
#define SBTC_ERRNOSTRPTR	14 /* <sys/errno.h> */

/* errno pointer & size (set only) */
#define SBTC_ERRNOLONGPTR	24