187 lines
4.1 KiB
C
187 lines
4.1 KiB
C
/*
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* Copyright (C) 2008 Martin Willi
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* Copyright (C) 2008 Thomas Kallenberg
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "uci_parser.h"
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#include <stdarg.h>
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#include <library.h>
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#include <uci.h>
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typedef struct private_uci_parser_t private_uci_parser_t;
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/**
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* Private data of an uci_parser_t object
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*/
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struct private_uci_parser_t {
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/**
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* Public part
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*/
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uci_parser_t public;
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/**
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* UCI package name this parser reads
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*/
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char *package;
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};
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/**
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* enumerator implementation create_section_enumerator
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*/
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typedef struct {
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/** implements enumerator */
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enumerator_t public;
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/** currently enumerated uci section */
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struct uci_element *current;
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/** all uci ipsec config sections */
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struct uci_list *list;
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/** uci conntext */
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struct uci_context *ctx;
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/** ipsec uci package */
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struct uci_package *package;
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/** NULL terminated list of keywords */
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char *keywords[];
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} section_enumerator_t;
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/**
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* Implementation of section_enumerator_t.enumerate
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*/
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static bool section_enumerator_enumerate(section_enumerator_t *this, ...)
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{
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struct uci_element *element;
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char **value;
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va_list args;
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int i;
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if (&this->current->list == this->list)
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{
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return FALSE;
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}
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va_start(args, this);
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value = va_arg(args, char**);
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if (value)
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{
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if (uci_lookup(this->ctx, &element, this->package,
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this->current->name, "name") == UCI_OK)
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{ /* use "name" attribute as config name if available ... */
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*value = uci_to_option(element)->value;
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}
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else
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{ /* ... or the section name becomes config name */
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*value = uci_to_section(this->current)->type;
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}
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}
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/* followed by keyword parameters */
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for (i = 0; this->keywords[i]; i++)
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{
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value = va_arg(args, char**);
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if (value && uci_lookup(this->ctx, &element, this->package,
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this->current->name, this->keywords[i]) == UCI_OK)
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{
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*value = uci_to_option(element)->value;
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}
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}
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va_end(args);
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this->current = list_to_element(this->current->list.next);
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return TRUE;
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}
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/**
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* Implementation of section_enumerator_t.public.destroy
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*/
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static void section_enumerator_destroy(section_enumerator_t *this)
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{
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uci_free_context(this->ctx);
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free(this);
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}
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/**
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* Implementation of backend_t.create_section_enumerator.
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*/
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static enumerator_t* create_section_enumerator(private_uci_parser_t *this, ...)
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{
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section_enumerator_t *e;
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va_list args;
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int i;
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/* allocate enumerator large enought to hold keyword pointers */
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i = 1;
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va_start(args, this);
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while (va_arg(args, char*))
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{
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i++;
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}
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va_end(args);
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e = malloc(sizeof(section_enumerator_t) + sizeof(char*) * i);
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i = 0;
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va_start(args, this);
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do
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{
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e->keywords[i] = va_arg(args, char*);
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}
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while (e->keywords[i++]);
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va_end(args);
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e->public.enumerate = (void*)section_enumerator_enumerate;
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e->public.destroy = (void*)section_enumerator_destroy;
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/* load uci context */
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e->ctx = uci_alloc_context();
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if (uci_load(e->ctx, this->package, &e->package) != UCI_OK)
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{
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section_enumerator_destroy(e);
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return NULL;
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}
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e->list = &e->package->sections;
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e->current = list_to_element(e->list->next);
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if (e->current->type != UCI_TYPE_SECTION)
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{
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section_enumerator_destroy(e);
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return NULL;
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}
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return &e->public;
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}
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/**
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* Implementation of uci_parser_t.destroy.
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*/
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static void destroy(private_uci_parser_t *this)
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{
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free(this->package);
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free(this);
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}
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/**
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* Described in header.
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*/
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uci_parser_t *uci_parser_create(char *package)
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{
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private_uci_parser_t *this = malloc_thing(private_uci_parser_t);
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this->public.create_section_enumerator = (enumerator_t*(*)(uci_parser_t*, ...))create_section_enumerator;
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this->public.destroy = (void(*)(uci_parser_t*))destroy;
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this->package = strdup(package);
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return &this->public;
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}
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