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/*
* SCCS: @(#)avmsg.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: @(#)avmsg.c 1.8 98/08/28 TETware release 3.3
NAME: avmsg.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
functions to convert a DTET interprocess character string message
between internal and machine-independent format
MODIFICATIONS:
Geoff Clare, UniSoft Ltd., August 1996
Missing <string.h>.
Andrew Dingwall, UniSoft Ltd., July 1998
Added support for shared API libraries.
Aaron Plattner, April 2010
Fixed warnings when compiled with GCC's -Wall option.
************************************************************************/
#ifndef TET_LITE /* -START-LITE-CUT- */
#include <stdio.h>
#include <string.h>
#include "dtmac.h"
#include "ldst.h"
#include "dtmsg.h"
#include "avmsg.h"
#include "dtetlib.h"
static struct stdesc st[] = {
AVMSG_DESC
};
static struct stdesc offst[] = {
OFFSET_DESC
};
static short fixed = -1;
/* static function declarations */
static int bs2avmargv PROTOLIST((char *, char **, int, int));
static void stinit PROTOLIST((void));
static void stinit()
{
register struct avmsg *ap = (struct avmsg *) 0;
register int n = 0;
AVMSG_INIT(st, ap, n, fixed);
OFFSET_INIT(offst);
}
/*
** tet_avmsg2bs() - put an avmsg and associated strings on a byte stream
*/
TET_IMPORT int tet_avmsg2bs(from, to)
register struct avmsg *from;
register char *to;
{
register int n;
register char *p, *sp;
unsigned short offset;
if (fixed < 0)
stinit();
/* convert the fixed part */
sp = to + tet_st2bs((char *) from, to, st, fixed);
/* allocate space on the byte stream for the argv list */
offset = 0;
for (n = 0; n < (int) from->av_argc; n++) {
sp += tet_st2bs((char *) &offset,
to + AV_AVMSGSZ(n), &offst[0], 1);
}
/* sp points to the place to store the strings themselves -
copy the strings and fill in the offsets */
for (n = 0; n < (int) from->av_argc; n++)
if (from->av_argv[n]) {
offset = sp - to;
(void) tet_st2bs((char *) &offset,
to + AV_AVMSGSZ(n), &offst[0], 1);
for (p = from->av_argv[n]; *p; p++)
*sp++ = *p;
*sp++ = '\0';
}
return(sp - to);
}
/*
** tet_bs2avmsg() - convert an avmsg to internal format
**
** return number of bytes in the avmsg result
**
** on return, av_argv contains the string pointers
** the strings themselves are not copied from the machine-independent
** area
*/
TET_IMPORT int tet_bs2avmsg(from, fromlen, to, tolen)
register char *from;
register int fromlen;
register struct avmsg **to;
register int *tolen;
{
if (fixed < 0)
stinit();
/* make sure the buffer is big enough for a minimal message */
if (BUFCHK((char **) to, tolen, avmsgsz(1)) < 0)
return(-1);
/* convert the fixed part */
if (tet_bs2st(from, (char *) *to, st, fixed,
TET_MIN(fromlen, AV_ARGVSTART)) < 0)
return(-1);
/* make sure the buffer is big enough for the actual message */
if ((int) (*to)->av_argc > 1 &&
BUFCHK((char **) to, tolen, avmsgsz((*to)->av_argc)) < 0)
return(-1);
/* then convert the variable part */
fromlen -= AV_ARGVSTART;
if (bs2avmargv(from, (*to)->av_argv, (int) (*to)->av_argc,
TET_MIN((int) (*to)->av_argc * AV_ARGVSZ, fromlen)) < 0)
return(-1);
/* return the number of bytes in the result */
return(avmsgsz((*to)->av_argc));
}
/*
** bs2avmargv() - convert argv byte-stream offsets to internal
** addresses
**
** note it is only the offsets that are copied to the internal format
** area, not the strings themselves
*/
static int bs2avmargv(from, to, nargv, len)
register char *from;
register char **to;
register int nargv, len;
{
register int n;
unsigned short offset;
if (fixed < 0)
stinit();
for (n = 0; n < nargv && len > 0; n++) {
if (tet_bs2st(from + AV_AVMSGSZ(n), (char *) &offset,
&offst[0], 1, TET_MIN(AV_ARGVSZ, len)) < 0)
break;
*(to + n) = offset ? from + offset : (char *) 0;
len -= AV_ARGVSZ;
}
return((len == 0 && n == nargv) ? 0 : -1);
}
/*
** tet_avmsgbslen() - return length of an avmsg on a byte stream
*/
TET_IMPORT int tet_avmsgbslen(mp)
register struct avmsg *mp;
{
register int len, n;
len = AV_AVMSGSZ(mp->av_argc);
for (n = 0; n < (int) mp->av_argc; n++)
if (mp->av_argv[n])
len += strlen(mp->av_argv[n]) + 1;
return(len);
}
#else /* -END-LITE-CUT- */
int tet_avmsg_c_not_used;
#endif /* !TET_LITE */ /* -LITE-CUT-LINE- */
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