rtfex.h

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/*****************************************************************************
 *
 * Filename:
 * ---------
 *   rtfex.h
 *
 * Project:
 * --------
 *   Maui
 *
 * Description:
 * ------------
 *    about exception handling
 *
 * Author:
 * -------
 *
 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
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 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *============================================================================
 ****************************************************************************/


/* RTFiles internal exception handling

   Every try block contains a code block, exception handlers, and a finally
   block. The code block is executed first, followed by exception handlers
   (if an exception is raised) and the finally block. Exception handlers and
   finally blocks are executed only once. If an exception is raised within
   an exception handler, the finally block is executed and the exception is
   propagated. If an exception is raised with a finally handler, it is
   propagated. When an exception handler runs to its end, the exception is
   NOT considered to be handled.
*/

#ifndef _RTFEX_H
#define _RTFEX_H

#define RTFX_SETJMP


#ifndef RTTDLL
   #ifdef RTT32DLL // assume all public symbols are in a separate EXE/DLL
      #if defined(_MSC_VER)
         #define RTTDLL __declspec(dllimport)
         #define RTTDDL __declspec(dllimport)
         #define RTTDDL2
      #elif defined(__BORLANDC__)
         #define RTTDLL
         #define RTTDDL extern
         #define RTTDDL2 __import
      #else // importing needs no special declaration or is not supported
         #define RTTDLL
         #define RTTDDL extern
         #define RTTDDL2
      #endif
   #else            // assume all public symbols are in this EXE/DLL
      #define RTTDLL
      #define RTTDDL extern
      #define RTTDDL2
   #endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

#ifdef RTFX_SETJMP
   #include <setjmp.h>
   //#define XCONTEXT              jmp_buf
   /* Remove RVCT warning, Karen Hsu, 2004/11/02, ADD START */
   #ifdef __RVCT__
      typedef long long mtk_jmpbuf[11];
   #else
      typedef int mtk_jmpbuf[11];
   #endif
   /* Remove RVCT warning, Karen Hsu, 2004/11/02, ADD END */
   #define XCONTEXT				mtk_jmpbuf
   #define XSAVECONTEXT(C)       setjmp(*(C))
   #define XRESTORECONTEXT(C, V) longjmp(*(C), V)
#elif defined(_WIN32) || defined (WIN32) || defined (__FLAT__)
   #include <rtfex32.h>
#else
   #include <rtfex16.h>
#endif


#ifdef _MSC_VER
   #define XAPI _fastcall
#elif defined __BORLANDC__
   #define XAPI __fastcall
#else
   #define XAPI
#endif

struct _XDataTag;

typedef struct _XDataTag {
   struct _XDataTag * Next;
   XCONTEXT Context;
   int XValue;
   int State;
   int IsHandled;
} _XData;

typedef enum { XReturn, XBreak } XAction;

#define XNOEX 0
#define XCODE XNOEX
#define XFINALLY -1

RTTDLL void    XAPI _XRaiseException(int XValue);
RTTDLL void    XAPI _XReExecute(void);
RTTDLL void    XAPI _XHandled(_XData * XD);
RTTDLL void    XAPI _XInitBlock(_XData * XD);
RTTDLL XAction XAPI _XCloseBlock(_XData * XD);
RTTDLL XAction XAPI _XCloseBlockCanReturn(_XData * XD);
RTTDLL XAction XAPI _XCloseBlockNoPropagate(_XData * XD);
RTTDLL _XData * XAPI _XHandler(void);

#define XHANDLER    _XHandler()
#define XRAISE(X)   _XRaiseException(X)
#define XREEXECUTE  _XReExecute()
#define XHANDLED    _XHandled(&_XDataBlock)

#define XTRY  while (1) { _XData _XDataBlock; _XInitBlock(&_XDataBlock); switch (XSAVECONTEXT(&_XDataBlock.Context)) {
// add an exception handler record to the exception stack

#define XENDX    } if (_XCloseBlock(&_XDataBlock) == XBreak) break; }
#define XEND     } { int x = _XDataBlock.XValue; if (_XCloseBlockCanReturn  (&_XDataBlock) == XReturn) return x; else if (x >= 0) break; } }
#define XEND_API } { int x = _XDataBlock.XValue; if (_XCloseBlockNoPropagate(&_XDataBlock) == XReturn) return x; else if (x >= 0) break; } }

#define XVALUE  _XDataBlock.XValue

#ifdef  __cplusplus
}
#endif

#endif