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/*
* cook - file construction tool
* Copyright (C) 1997, 1998 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 gosub opcodes
*/
#include <error_intl.h>
#include <expr/position.h>
#include <opcode.h>
#include <opcode/context.h>
#include <opcode/gosub.h>
#include <opcode/private.h>
#include <str_list.h>
#include <trace.h>
typedef struct opcode_gosub_ty opcode_gosub_ty;
struct opcode_gosub_ty
{
opcode_ty inherited;
expr_position_ty pos;
};
static void destructor _((opcode_ty *));
static void
destructor(op)
opcode_ty *op;
{
opcode_gosub_ty *this;
this = (opcode_gosub_ty *)op;
expr_position_destructor(&this->pos);
}
/*
* 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_gosub_ty *this;
string_list_ty *value;
int flag;
opcode_status_ty result;
trace(("opcode_gosub::execute()\n{\n"/*}*/));
this = (const opcode_gosub_ty *)op;
result = opcode_status_success;
value = opcode_context_string_list_pop(icp);
flag = string_list_bool(value);
string_list_delete(value);
if (flag)
{
error_with_position
(
&this->pos,
0,
i18n("function call returned non-zero exit status")
);
result = opcode_status_error;
}
trace(("return %s;\n", opcode_status_name(result)));
trace((/*{*/"}\n"));
return result;
}
/*
* NAME
* method
*
* DESCRIPTION
* The method variable describes this class.
*
* CAVEAT
* This symbol is not exported from this file.
*/
static opcode_method_ty method =
{
"gosub",
sizeof(opcode_gosub_ty),
destructor,
execute,
execute, /* script */
0, /* disassemble */
};
/*
* NAME
* opcode_gosub_new
*
* SYNOPSIS
* opcode_ty *opcode_gosub_new(void);
*
* DESCRIPTION
* The opcode_gosub_new function is used to allocate a new instance
* of a gosub opcode.
*
* RETURNS
* opcode_ty *; use opcode_delete when you are finished with it.
*/
opcode_ty *
opcode_gosub_new(pp)
expr_position_ty *pp;
{
opcode_ty *op;
opcode_gosub_ty *this;
trace(("opcode_gosub_new()\n{\n"/*}*/));
op = opcode_new(&method);
this = (opcode_gosub_ty *)op;
expr_position_copy_constructor(&this->pos, pp);
trace(("return %08lX;\n", (long)op));
trace((/*{*/"}\n"));
return op;
}
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