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/*
Clif - A C-like Interpreter Framework
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997 T. Hruz, L. Koren
1998 L. Koren
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.
*/
/*
* store_cont.c
*
* Stores and restores a context by context switching.
*/
#include <stdlib.h>
#include "global.h"
#include "mystdio.h"
#include "allocx.h"
#include "lex_t.h"
#include "input.h"
#include "store_cont.h"
#ifndef NOT_MSWIN_AND_YES_DOS
#ifdef FLEX_SCANNER
extern void *store_buffer_state ();
extern void flush_buffer ();
#endif
void
store_context ()
{
struct CONTEXT *arch;
if (NULL == (arch = (struct CONTEXT *)
callocx(1,sizeof(struct CONTEXT))))
{
error_message (4002);
return;
}
arch->previous = context;
context = arch;
context->bp = bp;
context->frame = frame;
context->kodp = kodp;
context->kodp1 = kodp1;
context->kodp2 = kodp2;
context->kodp3 = kodp3;
context->pc = pc;
context->stack = stack;
#ifdef FLEX_SCANNER
context->state = store_buffer_state ();
#else
context->input = input;
#endif
context->tmp = tmp;
context->tmph = tmph;
tmph = tmp;
kodp1 = kodp;
kodp2 = kodp;
kodp3 = NULL;
kodp4 = NULL;
}
void
restore_context ()
{
struct CONTEXT *arch;
if (context != NULL)
{
if (kodp2 == kodp1)
{
kodp = context->kodp;
kodp1 = context->kodp1;
kodp2 = context->kodp2;
kodp3 = context->kodp3;
kodp4 = context->kodp4;
}
arch = context;
bp = context->bp;
frame = context->frame;
pc = context->pc;
stack = context->stack;
tmp = context->tmp;
tmph = context->tmph;
#ifdef FLEX_SCANNER
flush_buffer (context->state);
#else
input = context->input;
#endif
context = context->previous;
free (arch);
}
}
#endif
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