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/*
* This file is part of GNUnet.
* (C) 2013 Christian Grothoff (and other contributing authors)
*
* GNUnet 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.
*
* GNUnet 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 GNUnet; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* @file env/env.c
* @brief Library providing operations for the @e environment of
* PSYC and Social messages, and for (de)serializing variable values.
* @author Gabor X Toth
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_env_lib.h"
/**
* Environment for a message.
*
* Contains modifiers.
*/
struct GNUNET_ENV_Environment
{
struct GNUNET_ENV_Modifier *mod_head;
struct GNUNET_ENV_Modifier *mod_tail;
size_t mod_count;
};
/**
* Create an environment.
*
* @return A newly allocated environment.
*/
struct GNUNET_ENV_Environment *
GNUNET_ENV_environment_create ()
{
return GNUNET_new (struct GNUNET_ENV_Environment);
}
/**
* Add a modifier to the environment.
*
* @param env The environment.
* @param oper Operation to perform.
* @param name Name of the variable.
* @param value Value of the variable.
* @param value_size Size of @a value.
*/
void
GNUNET_ENV_environment_add_mod (struct GNUNET_ENV_Environment *env,
enum GNUNET_ENV_Operator oper, const char *name,
const void *value, size_t value_size)
{
struct GNUNET_ENV_Modifier *mod = GNUNET_malloc (sizeof (*mod));
mod->oper = oper;
mod->name = name;
mod->value = value;
mod->value_size = value_size;
GNUNET_CONTAINER_DLL_insert_tail (env->mod_head, env->mod_tail, mod);
env->mod_count++;
}
/**
* Iterate through all modifiers in the environment.
*
* @param env The environment.
* @param it Iterator.
* @param it_cls Closure for iterator.
*/
void
GNUNET_ENV_environment_iterate (const struct GNUNET_ENV_Environment *env,
GNUNET_ENV_Iterator it, void *it_cls)
{
struct GNUNET_ENV_Modifier *mod;
for (mod = env->mod_head; NULL != mod; mod = mod->next)
it (it_cls, mod);
}
/**
* Get the number of modifiers in the environment.
*
* @param env The environment.
*
* @return Number of modifiers.
*/
size_t
GNUNET_ENV_environment_get_mod_count (const struct GNUNET_ENV_Environment *env)
{
return env->mod_count;
}
/**
* Destroy an environment.
*
* @param env The environment to destroy.
*/
void
GNUNET_ENV_environment_destroy (struct GNUNET_ENV_Environment *env)
{
struct GNUNET_ENV_Modifier *mod, *prev = NULL;
for (mod = env->mod_head; NULL != mod; mod = mod->next)
{
if (NULL != prev)
GNUNET_free (prev);
prev = mod;
}
if (NULL != prev)
GNUNET_free (prev);
GNUNET_free (env);
}
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