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/*
* This file is part of ltrace.
* Copyright (C) 2011,2012 Petr Machata, Red Hat Inc.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <assert.h>
#include <stdlib.h>
#include "param.h"
#include "type.h"
#include "value.h"
#include "expr.h"
void
param_init_type(struct param *param, struct arg_type_info *type, int own)
{
param->flavor = PARAM_FLAVOR_TYPE;
param->u.type.type = type;
param->u.type.own_type = own;
}
void
param_init_stop(struct param *param)
{
param->flavor = PARAM_FLAVOR_STOP;
}
void
param_init_pack(struct param *param, enum param_pack_flavor ppflavor,
struct expr_node *args, size_t nargs, int own_args,
struct param_enum *(*init)(struct value *cb_args,
size_t nargs,
struct value_dict *arguments),
int (*next)(struct param_enum *context,
struct arg_type_info *infop,
int *insert_stop),
enum param_status (*stop)(struct param_enum *ctx,
struct value *value),
void (*done)(struct param_enum *))
{
param->flavor = PARAM_FLAVOR_PACK;
param->u.pack.args = args;
param->u.pack.nargs = nargs;
param->u.pack.own_args = own_args;
param->u.pack.ppflavor = ppflavor;
param->u.pack.init = init;
param->u.pack.next = next;
param->u.pack.stop = stop;
param->u.pack.done = done;
}
struct param_enum *
param_pack_init(struct param *param, struct value_dict *fargs)
{
struct value cb_args[param->u.pack.nargs];
size_t i;
/* For evaluation of argument expressions, we pass in this as
* a "current" value. */
struct arg_type_info *void_type = type_get_simple(ARGTYPE_VOID);
struct value void_val;
value_init_detached(&void_val, NULL, void_type, 0);
struct param_enum *ret = NULL;
for (i = 0; i < param->u.pack.nargs; ++i) {
if (expr_eval(¶m->u.pack.args[i], &void_val,
fargs, &cb_args[i]) < 0)
goto release;
}
ret = param->u.pack.init(cb_args, param->u.pack.nargs, fargs);
release:
while (i-- > 0)
value_destroy(&cb_args[i]);
return ret;
}
int
param_pack_next(struct param *param, struct param_enum *context,
struct arg_type_info *infop, int *insert_stop)
{
return param->u.pack.next(context, infop, insert_stop);
}
enum param_status
param_pack_stop(struct param *param,
struct param_enum *context, struct value *value)
{
return param->u.pack.stop(context, value);
}
void
param_pack_done(struct param *param, struct param_enum *context)
{
return param->u.pack.done(context);
}
void
param_destroy(struct param *param)
{
if (param == NULL)
return;
switch (param->flavor) {
case PARAM_FLAVOR_TYPE:
if (param->u.type.own_type) {
type_destroy(param->u.type.type);
free(param->u.type.type);
}
return;
case PARAM_FLAVOR_PACK:
if (param->u.pack.own_args) {
size_t i;
for (i = 0; i < param->u.pack.nargs; ++i)
expr_destroy(¶m->u.pack.args[i]);
free(param->u.pack.args);
}
return;
case PARAM_FLAVOR_STOP:
return;
}
assert(!"Unknown value of param flavor!");
abort();
}
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