/* 
 *  Unix SMB/CIFS implementation.
 *  Virtual Windows Registry Layer (utility functions)
 *  Copyright (C) Gerald Carter                     2002-2005
 *
 *  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 3 of the License, or
 *  (at your option) 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, see <http://www.gnu.org/licenses/>.
 */

/* Implementation of registry frontend view functions. */

#include "includes.h"
#include "registry.h"
#include "reg_util_internal.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_REGISTRY

/***********************************************************************
 Utility function for splitting the base path of a registry path off
 by setting base and new_path to the apprapriate offsets within the
 path.

 WARNING!!  Does modify the original string!
 ***********************************************************************/

bool reg_split_path(char *path, char **base, char **new_path)
{
	char *p;

	*new_path = *base = NULL;

	if (!path) {
		return false;
	}
	*base = path;

	p = strchr(path, '\\');

	if ( p ) {
		*p = '\0';
		*new_path = p+1;
	}

	return true;
}

/***********************************************************************
 Utility function for splitting the base path of a registry path off
 by setting base and new_path to the appropriate offsets within the
 path.

 WARNING!!  Does modify the original string!
 ***********************************************************************/

bool reg_split_key(char *path, char **base, char **key)
{
	char *p;

	*key = *base = NULL;

	if (!path) {
		return false;
	}

	*base = path;

	p = strrchr(path, '\\');

	if (p) {
		*p = '\0';
		*key = p+1;
	}

	return true;
}

/**
 * The full path to the registry key is used as database key.
 * Leading and trailing '\' characters are stripped.
 * Key string is also normalized to UPPER case.
 */

char *normalize_reg_path(TALLOC_CTX *ctx, const char *keyname )
{
	char *p;
	char *nkeyname;

	/* skip leading '\' chars */
	while (*keyname == '\\') {
		keyname++;
	}

	nkeyname = talloc_strdup(ctx, keyname);
	if (nkeyname == NULL) {
		return NULL;
	}

	/* strip trailing '\' chars */
	p = strrchr(nkeyname, '\\');
	while ((p != NULL) && (p[1] == '\0')) {
		*p = '\0';
		p = strrchr(nkeyname, '\\');
	}

	if (!strupper_m(nkeyname)) {
		TALLOC_FREE(nkeyname);
		return NULL;
	}

	return nkeyname;
}

/**********************************************************************
 move to next non-delimter character
*********************************************************************/

char *reg_remaining_path(TALLOC_CTX *ctx, const char *key)
{
	char *new_path = NULL;
	char *p = NULL;

	if (!key || !*key) {
		return NULL;
	}

	new_path = talloc_strdup(ctx, key);
	if (!new_path) {
		return NULL;
	}
	/* normalize_reg_path( new_path ); */
	if (!(p = strchr(new_path, '\\')) ) {
		p = new_path;
	} else {
		p++;
	}

	return p;
}