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/*
This file is part of TALER
Copyright (C) 2014-2018 Taler Systems SA
TALER 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 3, or
(at your option) any later version.
TALER 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 TALER; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file lib/testing_api_cmd_rewind.c
* @brief command to rewind the instruction pointer.
* @author Marcello Stanisci
*/
#include "platform.h"
#include <taler/taler_exchange_service.h>
#include <taler/taler_testing_lib.h>
#include "taler_merchant_service.h"
#include "taler_merchant_testing_lib.h"
/**
* State for a "rewind" CMD.
*/
struct RewindIpState
{
/**
* Instruction pointer to set into the interpreter.
*/
unsigned int new_ip;
/**
* How many times this set should take place.
* However, this value lives at the calling process,
* and this CMD is only in charge of checking and
* decremeting it.
*/
unsigned int *counter;
};
/**
* Only defined to respect the API.
*/
static void
rewind_ip_cleanup (void *cls,
const struct TALER_TESTING_Command *cmd)
{}
/**
* Run the "rewind" CMD.
*
* @param cls closure.
* @param cmd command being executed now.
* @param is the interpreter state.
*/
static void
rewind_ip_run (void *cls,
const struct TALER_TESTING_Command *cmd,
struct TALER_TESTING_Interpreter *is)
{
struct RewindIpState *ris = cls;
/* FIXME: do check if '1<' is good */
if (1 < *ris->counter)
{
is->ip = ris->new_ip;
*ris->counter -= 1;
}
TALER_TESTING_interpreter_next (is);
}
/**
* Make the instruction pointer point to @a new_ip
* only if @a counter is greater than zero.
*
* @param label command label
* @param new_ip new instruction pointer's value. Note that,
* when the next instruction will be called, the interpreter
* will increment the ip _anyway_ so this value must be
* set to the index of the instruction we want to execute next
* MINUS one.
* @param counter counts how many times the rewinding has
* to happen.
*/
struct TALER_TESTING_Command
TALER_TESTING_cmd_rewind_ip
(const char *label,
int new_ip,
unsigned int *counter)
{
struct RewindIpState *ris;
struct TALER_TESTING_Command cmd;
ris = GNUNET_new (struct RewindIpState);
ris->new_ip = new_ip;
ris->counter = counter;
cmd.cls = ris;
cmd.label = label;
cmd.run = &rewind_ip_run;
cmd.cleanup = &rewind_ip_cleanup;
return cmd;
}
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