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/*
* Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
*
* 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 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 Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* Form parameters
*
*/
#include <stdlib.h>
#include <string.h>
#include <ipxe/params.h>
/** List of all parameter lists */
static LIST_HEAD ( parameters );
/**
* Free form parameter list
*
* @v refcnt Reference count
*/
static void free_parameters ( struct refcnt *refcnt ) {
struct parameters *params =
container_of ( refcnt, struct parameters, refcnt );
struct parameter *param;
struct parameter *tmp;
DBGC ( params, "PARAMS \"%s\" destroyed\n", params->name );
/* Free all parameters */
list_for_each_entry_safe ( param, tmp, ¶ms->entries, list ) {
list_del ( ¶m->list );
free ( param );
}
/* Free parameter list */
free ( params );
}
/**
* Find form parameter list by name
*
* @v name Parameter list name (may be NULL)
* @ret params Parameter list, or NULL if not found
*/
struct parameters * find_parameters ( const char *name ) {
struct parameters *params;
list_for_each_entry ( params, ¶meters, list ) {
if ( ( params->name == name ) ||
( strcmp ( params->name, name ) == 0 ) ) {
return params;
}
}
return NULL;
}
/**
* Create form parameter list
*
* @v name Parameter list name (may be NULL)
* @ret params Parameter list, or NULL on failure
*/
struct parameters * create_parameters ( const char *name ) {
struct parameters *params;
size_t name_len;
char *name_copy;
/* Destroy any existing parameter list of this name */
params = find_parameters ( name );
if ( params ) {
claim_parameters ( params );
params_put ( params );
}
/* Allocate parameter list */
name_len = ( name ? ( strlen ( name ) + 1 /* NUL */ ) : 0 );
params = zalloc ( sizeof ( *params ) + name_len );
if ( ! params )
return NULL;
ref_init ( ¶ms->refcnt, free_parameters );
name_copy = ( ( void * ) ( params + 1 ) );
/* Populate parameter list */
if ( name ) {
strcpy ( name_copy, name );
params->name = name_copy;
}
INIT_LIST_HEAD ( ¶ms->entries );
/* Add to list of parameter lists */
list_add_tail ( ¶ms->list, ¶meters );
DBGC ( params, "PARAMS \"%s\" created\n", params->name );
return params;
}
/**
* Add form parameter
*
* @v params Parameter list
* @v key Parameter key
* @v value Parameter value
* @ret param Parameter, or NULL on failure
*/
struct parameter * add_parameter ( struct parameters *params,
const char *key, const char *value ) {
struct parameter *param;
size_t key_len;
size_t value_len;
char *key_copy;
char *value_copy;
/* Allocate parameter */
key_len = ( strlen ( key ) + 1 /* NUL */ );
value_len = ( strlen ( value ) + 1 /* NUL */ );
param = zalloc ( sizeof ( *param ) + key_len + value_len );
if ( ! param )
return NULL;
key_copy = ( ( void * ) ( param + 1 ) );
value_copy = ( key_copy + key_len );
/* Populate parameter */
strcpy ( key_copy, key );
param->key = key_copy;
strcpy ( value_copy, value );
param->value = value_copy;
/* Add to list of parameters */
list_add_tail ( ¶m->list, ¶ms->entries );
DBGC ( params, "PARAMS \"%s\" added \"%s\"=\"%s\"\n",
params->name, param->key, param->value );
return param;
}
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