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/* -*- c -*- */
/*
* jump.h
*
* chpp
*
* Copyright (C) 1998 Mark Probst
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __JUMP_H__
#define __JUMP_H__
#include <setjmp.h>
extern jmp_buf *topmostJmpBuf;
#define DO_JUMP_CODE { \
jmp_buf jmpBuf, \
*lastTopmost = topmostJmpBuf; \
int jumpResult; \
\
topmostJmpBuf = &jmpBuf; \
jumpResult = setjmp(jmpBuf); \
if (jumpResult != 0) \
topmostJmpBuf = lastTopmost; \
else
#define WITH_JUMP_HANDLER if (jumpResult != 0)
#define END_JUMP_HANDLER else \
topmostJmpBuf = lastTopmost; \
}
#define JUMP(result) longjmp(*topmostJmpBuf, (result))
#define REJUMP JUMP(jumpResult)
#define JUMP_CODE_RETURN 0x01000000
#define JUMP_CODE_BREAK 0x02000000
#define JUMP_CODE_MASK 0xff000000
#define JUMP_INFO_MASK 0x00ffffff
#define JUMP_CODE (jumpResult & JUMP_CODE_MASK)
#define JUMP_INFO (jumpResult & JUMP_INFO_MASK)
#define JUMP_HANDLE_RETURN if (JUMP_CODE == JUMP_CODE_RETURN) REJUMP
#endif
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