/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <windows.h>
#include <setjmpex.h>

extern int _ProcSetsFP(void *);
extern void *RtlLookupFunctionEntry(unsigned long);
extern void  RtlUnwind(unsigned long, unsigned long, void *, unsigned long);
extern void  RtlUnwindRfp(unsigned long, unsigned long, void *, unsigned long);

typedef struct
{
    unsigned long sp;
    unsigned long pc;
    unsigned long seb;
    unsigned long type;
    unsigned long notused[2];
    unsigned long fp;
} _JUMPEXDATA;

void longjmpex(jmp_buf jb, int ret)
{
    EXCEPTION_RECORD  er;
    _JUMPEXDATA      *jd = (_JUMPEXDATA *)jb;

    er.ExceptionCode           = 0xE5670123;
    er.ExceptionFlags          = 0x00000002;
    er.ExceptionRecord         = 0L;
    er.ExceptionAddress        = 0L;
    er.NumberParameters        = 1L;
    er.ExceptionInformation[0] = jd->sp;

    if (!_ProcSetsFP(RtlLookupFunctionEntry(jd->pc)))
        RtlUnwind(jd->sp, jd->pc, &er, ret);
    else
        RtlUnwindRfp(jd->fp, jd->pc, &er, ret);
} /* longjmp() */
