/*
**  OSSP cfg - Configuration Parsing
**  Copyright (c) 1999-2002 Ralf S. Engelschall <rse@engelschall.com>
**  Copyright (c) 1999-2002 The OSSP Project (http://www.ossp.org/)
**  Copyright (c) 2001-2002 Cable & Wireless Deutschland (http://www.cw.com/de/)
**
**  This file is part of OSSP cfg, a configuration parsing
**  library which can be found at http://www.ossp.org/pkg/lib/cfg/.
**
**  Permission to use, copy, modify, and distribute this software for
**  any purpose with or without fee is hereby granted, provided that
**  the above copyright notice and this permission notice appear in all
**  copies.
**
**  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
**  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
**  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
**  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
**  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
**  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
**  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
**  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
**  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRCFG, STRICT LIABILITY,
**  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
**  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
**  SUCH DAMAGE.
**
**  cfg_node.c: configuration nodes
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>

#include "cfg_node.h"

cfg_rc_t cfg_node_create(cfg_node_t **node)
{
    cfg_node_t *n;

    if ((n = malloc(sizeof(cfg_node_t))) == NULL)
        return CFG_ERR_SYS;
    n->type     = CFG_NODE_TYPE_NN;
    n->parent   = NULL;
    n->rbroth   = NULL;
    n->child1   = NULL;
    n->token    = NULL;
    cfg_data_init(&n->data);
    *node = n;
    return CFG_OK;
}

cfg_rc_t cfg_node_set(cfg_node_t *node, cfg_node_attr_t attr, ...)
{
    va_list ap;

    if (node == NULL)
        return CFG_ERR_ARG;
    va_start(ap, attr);
    switch (attr) {
        case CFG_NODE_ATTR_TYPE: {
            node->type = (cfg_node_type_t)va_arg(ap, cfg_node_type_t);
            break;
        }
        case CFG_NODE_ATTR_PARENT: {
            node->parent = (cfg_node_t *)va_arg(ap, cfg_node_t *);
            break;
        }
        case CFG_NODE_ATTR_RBROTH: {
            node->rbroth = (cfg_node_t *)va_arg(ap, cfg_node_t *);
            break;
        }
        case CFG_NODE_ATTR_CHILD1: {
            node->child1 = (cfg_node_t *)va_arg(ap, cfg_node_t *);
            break;
        }
        case CFG_NODE_ATTR_TOKEN: {
            node->token = (char *)va_arg(ap, char *);
            break;
        }
        case CFG_NODE_ATTR_DATA: {
            return CFG_ERR_USE;
        }
        default:
            return CFG_ERR_ARG;
    }
    va_end(ap);
    return CFG_OK;
}

cfg_rc_t cfg_node_get(cfg_node_t *node, cfg_node_attr_t attr, ...)
{
    va_list ap;

    if (node == NULL)
        return CFG_ERR_ARG;
    va_start(ap, attr);
    switch (attr) {
        case CFG_NODE_ATTR_TYPE: {
            cfg_node_type_t *type = (cfg_node_type_t *)va_arg(ap, void *);
            *type = node->type;
            break;
        }
        case CFG_NODE_ATTR_PARENT: {
            cfg_node_t **n = (cfg_node_t **)va_arg(ap, void *);
            *n = node->parent;
            break;
        }
        case CFG_NODE_ATTR_RBROTH: {
            cfg_node_t **n = (cfg_node_t **)va_arg(ap, void *);
            *n = node->rbroth;
            break;
        }
        case CFG_NODE_ATTR_CHILD1: {
            cfg_node_t **n = (cfg_node_t **)va_arg(ap, void *);
            *n = node->child1;
            break;
        }
        case CFG_NODE_ATTR_TOKEN: {
            char **token = (char **)va_arg(ap, char **);
            *token = node->token;
            break;
        }
        case CFG_NODE_ATTR_DATA: {
            cfg_data_t **data = (cfg_data_t **)va_arg(ap, void *);
            *data = &(node->data);
            break;
        }
        default:
            return CFG_ERR_ARG;
    }
    va_end(ap);
    return CFG_OK;
}

cfg_rc_t cfg_node_link(cfg_node_t *node, cfg_node_link_t id, cfg_node_t *node2)
{
    cfg_node_t *n;

    if (node == NULL || node2 == NULL)
        return CFG_ERR_ARG;
    if (id == CFG_NODE_LINK_RBROTH) {
        /* make node a rbroth */
        n = node2;
        n->parent = node->parent;
        while (n->rbroth != NULL) {
            n->parent = node->parent;
            n = n->rbroth;
        }
        n->rbroth = node->rbroth; 
        node->rbroth = node2;
    }
    else if (id == CFG_NODE_LINK_CHILD1) {
        /* make node a child1 */
        n = node2;
        n->parent = node;
        while (n->rbroth != NULL) {
            n->parent = node;
            n = n->rbroth;
        }
        n->rbroth = node->child1;
        node->child1 = node2;
    }
    return CFG_OK;
}

cfg_rc_t cfg_node_unlink(cfg_node_t *node)
{
    cfg_node_t *n;

    if (node == NULL)
        return CFG_ERR_ARG;
    if (node->parent == NULL)
        return CFG_OK;
    if (node->parent->child1 == node) {
        /* node was a child1 */
        node->parent->child1 = node->rbroth;
    }
    else {
        /* node was a rbroth */
        n = node->parent->child1;
        while (n->rbroth != node)
            n = n->rbroth;
        n->rbroth = node->rbroth;
    }
    return CFG_OK;
}

cfg_rc_t cfg_node_apply(cfg_node_t *node, void (*cb_fct)(void *, cfg_node_t *), void *cb_ctx)
{
    cfg_rc_t rc;

    if (cb_fct == NULL)
        return CFG_ERR_ARG;
    if (node != NULL) {
        cb_fct(cb_ctx, node);
        if (node->child1 != NULL)
            if ((rc = cfg_node_apply(node->child1, cb_fct, cb_ctx)) != CFG_OK)
                return rc;
        if (node->rbroth != NULL)
            if ((rc = cfg_node_apply(node->rbroth, cb_fct, cb_ctx)) != CFG_OK)
                return rc;
    }
    return CFG_OK;
}

cfg_rc_t cfg_node_destroy(cfg_node_t *node)
{
    if (node == NULL)
        return CFG_ERR_ARG;
    free(node);
    return CFG_OK;
}