/*
This file is part of GNUnet
Copyright (C) 2013, 2014, 2016 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
/**
* @file reclaim-attribute/plugin_reclaim_attribute_gnuid.c
* @brief identity attribute plugin to provide the API for fundamental
* attribute types.
*
* @author Martin Schanzenbach
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_reclaim_attribute_plugin.h"
#include
/**
* Convert the 'value' of an attribute to a string.
*
* @param cls closure, unused
* @param type type of the attribute
* @param data value in binary encoding
* @param data_size number of bytes in @a data
* @return NULL on error, otherwise human-readable representation of the value
*/
static char *
gnuid_value_to_string (void *cls,
uint32_t type,
const void *data,
size_t data_size)
{
switch (type)
{
case GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING:
return GNUNET_strndup (data, data_size);
default:
return NULL;
}
}
/**
* Convert human-readable version of a 'value' of an attribute to the binary
* representation.
*
* @param cls closure, unused
* @param type type of the attribute
* @param s human-readable string
* @param data set to value in binary encoding (will be allocated)
* @param data_size set to number of bytes in @a data
* @return #GNUNET_OK on success
*/
static int
gnuid_string_to_value (void *cls,
uint32_t type,
const char *s,
void **data,
size_t *data_size)
{
if (NULL == s)
return GNUNET_SYSERR;
switch (type)
{
case GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING:
*data = GNUNET_strdup (s);
*data_size = strlen (s);
return GNUNET_OK;
default:
return GNUNET_SYSERR;
}
}
/**
* Mapping of attribute type numbers to human-readable
* attribute type names.
*/
static struct {
const char *name;
uint32_t number;
} gnuid_name_map[] = {
{ "STRING", GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING },
{ NULL, UINT32_MAX }
};
/**
* Convert a type name to the corresponding number.
*
* @param cls closure, unused
* @param gnuid_typename name to convert
* @return corresponding number, UINT32_MAX on error
*/
static uint32_t
gnuid_typename_to_number (void *cls,
const char *gnuid_typename)
{
unsigned int i;
i=0;
while ( (NULL != gnuid_name_map[i].name) &&
(0 != strcasecmp (gnuid_typename,
gnuid_name_map[i].name)) )
i++;
return gnuid_name_map[i].number;
}
/**
* Convert a type number (i.e. 1) to the corresponding type string
*
* @param cls closure, unused
* @param type number of a type to convert
* @return corresponding typestring, NULL on error
*/
static const char *
gnuid_number_to_typename (void *cls,
uint32_t type)
{
unsigned int i;
i=0;
while ( (NULL != gnuid_name_map[i].name) &&
(type != gnuid_name_map[i].number) )
i++;
return gnuid_name_map[i].name;
}
/**
* Entry point for the plugin.
*
* @param cls NULL
* @return the exported block API
*/
void *
libgnunet_plugin_reclaim_attribute_gnuid_init (void *cls)
{
struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api;
api = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions);
api->value_to_string = &gnuid_value_to_string;
api->string_to_value = &gnuid_string_to_value;
api->typename_to_number = &gnuid_typename_to_number;
api->number_to_typename = &gnuid_number_to_typename;
return api;
}
/**
* Exit point from the plugin.
*
* @param cls the return value from #libgnunet_plugin_block_test_init()
* @return NULL
*/
void *
libgnunet_plugin_reclaim_attribute_gnuid_done (void *cls)
{
struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api = cls;
GNUNET_free (api);
return NULL;
}
/* end of plugin_reclaim_attribute_type_gnuid.c */