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/*
* SCCS: @(#)valmsg.c 1.8 (98/08/28)
*
* UniSoft Ltd., London, England
*
* (C) Copyright 1992 X/Open Company Limited
*
* All rights reserved. No part of this source code may be reproduced,
* stored in a retrieval system, or transmitted, in any form or by any
* means, electronic, mechanical, photocopying, recording or otherwise,
* except as stated in the end-user licence agreement, without the prior
* permission of the copyright owners.
*
* X/Open and the 'X' symbol are trademarks of X/Open Company Limited in
* the UK and other countries.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/************************************************************************
SCCS: @(#)valmsg.c 1.8 98/08/28 TETware release 3.3
NAME: valmsg.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
function to convert DTET interprocess numeric value message between
internal and machine-independent format
MODIFICATIONS:
Andrew Dingwall, UniSoft Ltd., October 1994
added support for sync message data on the end of a numeric
value message
Andrew Dingwall, UniSoft Ltd., July 1998
Added support for shared API libraries.
************************************************************************/
#ifndef TET_LITE /* -START-LITE-CUT- */
#include <stdio.h>
#include "dtmac.h"
#include "ldst.h"
#include "dtmsg.h"
#include "valmsg.h"
#include "dtetlib.h"
static struct stdesc st[] = {
VALMSG_DESC
};
static short nst = -1;
static short fixed = -1;
/* static function declarations */
static int bs2vsmsg PROTOLIST((char *, int, struct valmsg **, int *, int));
static void stinit PROTOLIST((void));
static void stinit()
{
register struct valmsg *sp = (struct valmsg *) 0;
register int n = 0;
VALMSG_INIT(st, sp, n, nst, fixed);
}
/*
** tet_valmsg2bs() - convert a valmsg to machine-independent format
**
** return the number of bytes occupied by the result
*/
int tet_valmsg2bs(from, to)
register struct valmsg *from;
register char *to;
{
register int count;
struct stdesc tmp;
if (nst < 0)
stinit();
/* convert the fixed part */
count = tet_st2bs((char *) from, to, st, fixed);
/* then convert the variable part */
tmp = st[fixed];
tmp.st_type = (tmp.st_type & ST_TYPEMASK) |
(from->vm_nvalue & ST_COUNTMASK);
count += tet_st2bs((char *) from, to + VM_VALUESTART, &tmp, 1);
return(count);
}
/*
** tet_bs2valmsg() - convert a valmsg message to internal format
**
** return the number of bytes in the valmsg result, or -1 on error
*/
TET_IMPORT int tet_bs2valmsg(from, fromlen, to, tolen)
char *from;
int fromlen;
struct valmsg **to;
int *tolen;
{
return(bs2vsmsg(from, fromlen, to, tolen, 0));
}
/*
** bs2vsmsg() - common subroutine for tet_bs2valmsg() and tet_bs2synmsg()
*/
static int bs2vsmsg(from, fromlen, to, tolen, smproc)
register char *from;
register int fromlen;
register struct valmsg **to;
register int *tolen;
int smproc;
{
struct stdesc tmp;
register int bslen, vmlen;
if (nst < 0)
stinit();
/* make sure that the buffer is big enough for a minimal message */
if (BUFCHK((char **) to, tolen, valmsgsz(1)) < 0)
return(-1);
/* convert the fixed part */
if (tet_bs2st(from, (char *) *to, st, fixed,
TET_MIN(fromlen, VM_VALUESTART)) < 0)
return(-1);
/* make sure that the buffer is big enough for the actual message */
if ((int) (*to)->vm_nvalue > 1 &&
BUFCHK((char **) to, tolen, valmsgsz((*to)->vm_nvalue)) < 0)
return(-1);
/* then convert the variable part */
tmp = st[fixed];
tmp.st_type = (tmp.st_type & ST_TYPEMASK) |
((*to)->vm_nvalue & ST_COUNTMASK);
bslen = fromlen - VM_VALUESTART;
if (smproc &&
(vmlen = VM_VALMSGSZ((*to)->vm_nvalue) - VM_VALUESTART) < bslen)
bslen = vmlen;
if (tet_bs2st(from + VM_VALUESTART, (char *) *to, &tmp, 1, bslen) < 0)
return(-1);
/* return the number of bytes in the result */
return(valmsgsz((*to)->vm_nvalue));
}
/*
** tet_synmsg2bs() - convert a synmsg to machine-independent format
**
** return the number of bytes occupied by the result
*/
int tet_synmsg2bs(from, to)
register struct valmsg *from;
register char *to;
{
register int count;
register int dlen;
struct stdesc tmp;
/* convert the valmsg part */
count = tet_valmsg2bs(from, to);
/* convert the sync message data (if any) */
if ((dlen = VM_MSDLEN(from)) > 0) {
tmp.st_type = ST_CHAR(dlen);
tmp.st_bsoff = count;
tmp.st_stoff = VM_MSDATA(from) - (char *) from;
count += tet_st2bs((char *) from, to, &tmp, 1);
}
return(count);
}
/*
** tet_bs2synmsg() - convert a synmsg message to internal format
**
** return the number of bytes in the valmsg result, or -1 on error
*/
TET_IMPORT int tet_bs2synmsg(from, fromlen, to, tolen)
register char *from;
register int fromlen;
register struct valmsg **to;
register int *tolen;
{
register int count;
register int dlen;
struct stdesc tmp;
/* convert the valmsg part */
if ((count = bs2vsmsg(from, fromlen, to, tolen, 1)) < 0)
return(-1);
/* return now if there is no sync message data to convert */
if (fromlen <= (int) VM_VALMSGSZ((*to)->vm_nvalue))
return(count);
/* grow the buffer if necessary to accomodate the sync message data */
dlen = (int) VM_MSDLEN(*to);
if (BUFCHK((char **) to, tolen, synmsgsz((*to)->vm_nvalue, dlen)) < 0)
return(-1);
/* convert the sync message data */
tmp.st_type = ST_CHAR(dlen);
tmp.st_bsoff = VM_VALMSGSZ((*to)->vm_nvalue);
tmp.st_stoff = VM_MSDATA(*to) - (char *) *to;
if (tet_bs2st(from, (char *) *to, &tmp, 1,
fromlen - VM_VALMSGSZ((*to)->vm_nvalue)) < 0)
return(-1);
return(synmsgsz((*to)->vm_nvalue, dlen));
}
#else /* -END-LITE-CUT- */
int tet_valmsg_c_not_empty;
#endif /* !TET_LITE */ /* -LITE-CUT-LINE- */
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