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/*
* Copyright (C) 2008 Martin Willi
* Copyright (C) 2008 Thomas Kallenberg
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "uci_parser.h"
#include <stdarg.h>
#include <library.h>
#include <uci.h>
typedef struct private_uci_parser_t private_uci_parser_t;
/**
* Private data of an uci_parser_t object
*/
struct private_uci_parser_t {
/**
* Public part
*/
uci_parser_t public;
/**
* UCI package name this parser reads
*/
char *package;
};
/**
* enumerator implementation create_section_enumerator
*/
typedef struct {
/** implements enumerator */
enumerator_t public;
/** currently enumerated uci section */
struct uci_element *current;
/** all uci ipsec config sections */
struct uci_list *list;
/** uci conntext */
struct uci_context *ctx;
/** ipsec uci package */
struct uci_package *package;
/** NULL terminated list of keywords */
char *keywords[];
} section_enumerator_t;
/**
* Implementation of section_enumerator_t.enumerate
*/
static bool section_enumerator_enumerate(section_enumerator_t *this, ...)
{
struct uci_element *element;
char **value;
va_list args;
int i;
if (&this->current->list == this->list)
{
return FALSE;
}
va_start(args, this);
value = va_arg(args, char**);
if (value)
{
if (uci_lookup(this->ctx, &element, this->package,
this->current->name, "name") == UCI_OK)
{ /* use "name" attribute as config name if available ... */
*value = uci_to_option(element)->value;
}
else
{ /* ... or the section name becomes config name */
*value = uci_to_section(this->current)->type;
}
}
/* followed by keyword parameters */
for (i = 0; this->keywords[i]; i++)
{
value = va_arg(args, char**);
if (value && uci_lookup(this->ctx, &element, this->package,
this->current->name, this->keywords[i]) == UCI_OK)
{
*value = uci_to_option(element)->value;
}
}
va_end(args);
this->current = list_to_element(this->current->list.next);
return TRUE;
}
/**
* Implementation of section_enumerator_t.public.destroy
*/
static void section_enumerator_destroy(section_enumerator_t *this)
{
uci_free_context(this->ctx);
free(this);
}
/**
* Implementation of backend_t.create_section_enumerator.
*/
static enumerator_t* create_section_enumerator(private_uci_parser_t *this, ...)
{
section_enumerator_t *e;
va_list args;
int i;
/* allocate enumerator large enought to hold keyword pointers */
i = 1;
va_start(args, this);
while (va_arg(args, char*))
{
i++;
}
va_end(args);
e = malloc(sizeof(section_enumerator_t) + sizeof(char*) * i);
i = 0;
va_start(args, this);
do
{
e->keywords[i] = va_arg(args, char*);
}
while (e->keywords[i++]);
va_end(args);
e->public.enumerate = (void*)section_enumerator_enumerate;
e->public.destroy = (void*)section_enumerator_destroy;
/* load uci context */
e->ctx = uci_alloc_context();
if (uci_load(e->ctx, this->package, &e->package) != UCI_OK)
{
section_enumerator_destroy(e);
return NULL;
}
e->list = &e->package->sections;
e->current = list_to_element(e->list->next);
if (e->current->type != UCI_TYPE_SECTION)
{
section_enumerator_destroy(e);
return NULL;
}
return &e->public;
}
/**
* Implementation of uci_parser_t.destroy.
*/
static void destroy(private_uci_parser_t *this)
{
free(this->package);
free(this);
}
/**
* Described in header.
*/
uci_parser_t *uci_parser_create(char *package)
{
private_uci_parser_t *this = malloc_thing(private_uci_parser_t);
this->public.create_section_enumerator = (enumerator_t*(*)(uci_parser_t*, ...))create_section_enumerator;
this->public.destroy = (void(*)(uci_parser_t*))destroy;
this->package = strdup(package);
return &this->public;
}
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