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/* Copyright (C) 2010 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef SCM_CONTROL_H
#define SCM_CONTROL_H
#define SCM_F_PROMPT_INLINE 0x1
#define SCM_F_PROMPT_ESCAPE 0x2
#define SCM_PROMPT_P(x) (!SCM_IMP (x) && SCM_TYP7(x) == scm_tc7_prompt)
#define SCM_PROMPT_FLAGS(x) (SCM_CELL_WORD ((x), 0) >> 8)
#define SCM_PROMPT_INLINE_P(x) (SCM_PROMPT_FLAGS (x) & SCM_F_PROMPT_INLINE)
#define SCM_PROMPT_ESCAPE_P(x) (SCM_PROMPT_FLAGS (x) & SCM_F_PROMPT_ESCAPE)
#define SCM_PROMPT_TAG(x) (SCM_CELL_OBJECT ((x), 1)
#define SCM_PROMPT_REGISTERS(x) ((struct scm_prompt_registers*)SCM_CELL_WORD ((x), 2))
#define SCM_PROMPT_DYNENV(x) (SCM_CELL_OBJECT ((x), 3))
#define SCM_PROMPT_HANDLER(x) (SCM_CELL_OBJECT ((x), 4))
#define SCM_PROMPT_PRE_UNWIND_HANDLER(x) (SCM_CELL_OBJECT ((x), 5))
#define SCM_PROMPT_SETJMP(p) (SCM_I_SETJMP (SCM_PROMPT_REGISTERS (p)->regs))
struct scm_prompt_registers
{
scm_t_uint8 *ip;
SCM *sp;
SCM *fp;
scm_i_jmp_buf regs;
};
SCM_INTERNAL SCM scm_c_make_prompt (SCM vm, SCM k, SCM handler, SCM pre_unwind,
scm_t_uint8 inline_p, scm_t_uint8 escape_only_p);
SCM_INTERNAL void scm_register_control (void);
#endif /* SCM_CONTROL_H */
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