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domnode.c

static const char version[] = "$Id$";

/* 
 * Copyright 2001-2003, Meiosys (www.meiosys.com). All rights reserved.
 *
 * See the COPYING file for the terms of usage and distribution.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "malloc.h"
#include "error.h"
#include "domnode.h"

/* TODO: generic format support */
#include "domnode-xml.h"

/******************************************************************************/
extern sd_domnode_t* __sd_domnode_new(const char* a_name, const char* a_value,
                              int is_elem)
{
    sd_domnode_t* this;
    
    this = sd_calloc(1, sizeof(*this));
    
    this->name     = a_name    ? sd_strdup(a_name) : 0;
    this->value    = a_value   ? sd_strdup(a_value): 0;
    this->children = is_elem ? sd_list_new(10) : 0;
    this->attrs    = is_elem ? sd_list_new(10) : 0;
    
    return this;
}

/******************************************************************************/
extern sd_domnode_t* sd_domnode_new(const char* a_name, const char* a_value)
{
    return __sd_domnode_new(a_name, a_value, 1);
}

/******************************************************************************/
static int foreach_delete(sd_domnode_t* a_node, void* unused)
{
    sd_domnode_delete(a_node);
    return 0;
}

/******************************************************************************/
static void domnode_clear(sd_domnode_t* this)
{
    free((void*) this->name);
    free((void*) this->value);
    
    sd_list_foreach(this->children, (sd_list_func_t) foreach_delete, 0);
    sd_list_delete(this->children);
    
    sd_list_foreach(this->attrs, (sd_list_func_t) foreach_delete, 0);
    sd_list_delete(this->attrs);
}

/******************************************************************************/
extern void sd_domnode_delete(sd_domnode_t* this)
{
    if (!this)
      return;
    
    domnode_clear(this);
    free(this);
}

/******************************************************************************/
static void domnode_update(sd_domnode_t* this, sd_domnode_t* a_node)
{
    domnode_clear(this);
    this->name    = a_node->name;
    this->value   = a_node->value;
    this->children = a_node->children;
    this->attrs   = a_node->attrs;
    
    /* Destroy this now empty node ! */
    free(a_node);
}

/******************************************************************************/
extern int sd_domnode_fread(sd_domnode_t* this, FILE* a_stream)
{
    int ret;
    sd_domnode_t* node;
    
    /* TODO: generic format support */
    if (! (ret = __sd_domnode_xml_fread(&node, a_stream)))
      domnode_update(this, node);
    
    return ret ? -1 : 0;
}

/******************************************************************************/
extern int sd_domnode_read(sd_domnode_t* this, const char* a_buffer,
                     size_t a_size)
{
    int ret;
    sd_domnode_t* node;
    
    /* TODO: generic format support */
    if (! (ret = __sd_domnode_xml_read(&node, a_buffer, a_size)))
      domnode_update(this, node);
    
    return ret ? -1 : 0;
}

/******************************************************************************/
extern int sd_domnode_write(sd_domnode_t* this, char** a_buffer,
                      size_t* a_size)
{
    /* TODO: generic format support */
    return __sd_domnode_xml_write(this, a_buffer, a_size);
}

/******************************************************************************/
extern int sd_domnode_fwrite(const sd_domnode_t* this, FILE* a_stream)
{
    /* TODO: generic format support */
    return __sd_domnode_xml_fwrite(this, a_stream);
}

/******************************************************************************/
extern int sd_domnode_load(sd_domnode_t* this, const char* a_filename)
{
    FILE* fp;
    int   ret = 0;

    if ( (fp = fopen(a_filename, "r")) == 0)
      return -1;
    
    ret = sd_domnode_fread(this, fp);

    fclose(fp);
    return ret;
}

/******************************************************************************/
extern int sd_domnode_store(const sd_domnode_t* this, const char* afilename)
{
    FILE* fp;
    int   ret = 0;

    if ( (fp = fopen(afilename, "w")) == 0)
      return -1;
    
    ret = sd_domnode_fwrite(this, fp);

    fclose(fp);
    return ret;
}

/******************************************************************************/
extern sd_domnode_t* sd_domnode_search(const sd_domnode_t* this,
                               const char* a_name)
{
    sd_list_iter_t* i;

    for (i = sd_list_begin(this->children); i != sd_list_end(this->children); 
       i = sd_list_iter_next(i)) {
      sd_domnode_t* node = i->data;
      
      if (strcmp(node->name, a_name) == 0)
          return node;
    }

    for (i = sd_list_begin(this->attrs); i != sd_list_end(this->attrs); 
       i = sd_list_iter_next(i)) {
      sd_domnode_t* node = i->data;
      
      if (strcmp(node->name, a_name) == 0)
          return node;
    }

    for (i = sd_list_begin(this->children); i != sd_list_end(this->children); 
       i = sd_list_iter_next(i)) {
      sd_domnode_t* node = i->data;
      
      if ((node = sd_domnode_search(node, a_name)) != 0)
          return node;
    }

    return 0;
}

/******************************************************************************/
extern sd_domnode_t* sd_domnode_attrs_put(sd_domnode_t* this,
                                sd_domnode_t* a_attr)
{
    sd_list_iter_t* i;
    
    if (!this || !this->attrs || !a_attr || !a_attr->value)
      return 0;
    
    if ((i = sd_list_lookadd(this->attrs, a_attr)) == sd_list_end(this->attrs))
      return 0;
    
    return i->data;
}

/******************************************************************************/
extern sd_domnode_t* 
sd_domnode_attrs_get(const sd_domnode_t* this, const char* a_name)
{
    sd_list_iter_t* i;

    if (!this || !this->attrs || !a_name || !*a_name)
      return 0;

    for (i = sd_list_begin(this->attrs); i != sd_list_end(this->attrs); 
       i = sd_list_iter_next(i)) {
      sd_domnode_t* node = i->data;
      
      if (strcmp(node->name, a_name) == 0)
          return node;
    }

    return 0;
}

/******************************************************************************/
extern sd_domnode_t* 
sd_domnode_attrs_remove(sd_domnode_t* this, const char* a_name)
{
    sd_list_iter_t* i;

    if (!this || !this->attrs || !a_name || !*a_name)
      return 0;

    for (i = sd_list_begin(this->attrs); i != sd_list_end(this->attrs);
       i = sd_list_iter_next(i)) {
      sd_domnode_t* node = i->data;
      
      if (strcmp(node->name, a_name) == 0) {
          sd_list_iter_del(i);
          return node;
      }
    }

    return 0;
}

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