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/*
* cook - file construction tool
* Copyright (C) 1997 Peter Miller;
* All rights reserved.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate jmpf opcodes
*/
#include <ac/stdio.h>
#include <opcode/context.h>
#include <opcode/jmpf.h>
#include <opcode/label.h>
#include <opcode/private.h>
#include <str_list.h>
#include <trace.h>
typedef struct opcode_jmpf_ty opcode_jmpf_ty;
struct opcode_jmpf_ty
{
opcode_ty inherited;
size_t destination;
};
/*
* NAME
* execute
*
* SYNOPSIS
* opcode_status_ty execute(opcode_ty *, opcode_context_ty *);
*
* DESCRIPTION
* The execute function is used to execute the given opcode within
* the given interpretation context.
*
* RETURNS
* opcode_status_ty to indicate the result of the execution
*/
static opcode_status_ty execute _((const opcode_ty *, opcode_context_ty *));
static opcode_status_ty
execute(op, icp)
const opcode_ty *op;
opcode_context_ty *icp;
{
const opcode_jmpf_ty *this;
string_list_ty *value;
int flag;
trace(("opcode_jmpf::execute()\n{\n"/*}*/));
this = (const opcode_jmpf_ty *)op;
value = opcode_context_string_list_pop(icp);
flag = string_list_bool(value);
string_list_delete(value);
if (!flag)
opcode_context_goto(icp, this->destination);
trace(("return success;\n"));
trace((/*{*/"}\n"));
return opcode_status_success;
}
/*
* NAME
* disassemble
*
* SYNOPSIS
* void disassemble(opcode_ty *);
*
* DESCRIPTION
* The disassemble function is used to disassemble the copdode and
* its arguments onto the standard output. Don't worry about the
* location or a trailing newline.
*/
static void disassemble _((const opcode_ty *));
static void
disassemble(op)
const opcode_ty *op;
{
const opcode_jmpf_ty *this;
trace(("opcode_jmpf::disassemle()\n{\n"/*}*/));
this = (const opcode_jmpf_ty *)op;
printf("%ld", (long)this->destination);
trace((/*{*/"}\n"));
}
/*
* NAME
* method
*
* DESCRIPTION
* The method variable describes this class.
*
* CAVEAT
* This symbol is not exported from this file.
*/
static opcode_method_ty method =
{
"jmpf",
sizeof(opcode_jmpf_ty),
0, /* destructor */
execute,
execute, /* script */
disassemble,
};
/*
* NAME
* opcode_jmpf_new
*
* SYNOPSIS
* opcode_ty *opcode_jmpf_new(void);
*
* DESCRIPTION
* The opcode_jmpf_new function is used to allocate a new instance
* of a jmpf opcode.
*
* RETURNS
* opcode_ty *; use opcode_delete when you are finished with it.
*/
opcode_ty *
opcode_jmpf_new(lp)
opcode_label_ty *lp;
{
opcode_ty *op;
opcode_jmpf_ty *this;
trace(("opcode_jmpf_new()\n{\n"/*}*/));
op = opcode_new(&method);
this = (opcode_jmpf_ty *)op;
opcode_label_refer(lp, &this->destination);
trace(("return %08lX;\n", (long)op));
trace((/*{*/"}\n"));
return op;
}
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