/* NetHalt - Client install functions
 * Copyright (C) 2008 Daniel Collins <solemnwarning@solemnwarning.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *	* Redistributions of source code must retain the above copyright
 *	  notice, this list of conditions and the following disclaimer.
 *
 *	* Redistributions in binary form must reproduce the above copyright
 *	  notice, this list of conditions and the following disclaimer in the
 *	  documentation and/or other materials provided with the distribution.
 *
 *	* Neither the name of the author nor the names of its contributors may
 *	  be used to endorse or promote products derived from this software
 *	  without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
 * EXPRESS 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 AUTHOR 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 CONTRACT, 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.
*/

#include <windows.h>
#include "nsplugin.h"

/* Write a value to the HKLM registry if it does not exist
 * Usage: cinst::reg_write [string|dword] <key> <name> <value>
*/
nsis_function reg_write(HWND hwnd, int vsize, char *vars, stack_t **stack) {
	char type[vsize], key[vsize], name[vsize], value[vsize];
	DWORD errnum, dwval;
	HKEY regkey;
	
	nsis_init(hwnd, vsize, vars, stack);
	
	nsis_pop(type);
	nsis_pop(key);
	nsis_pop(name);
	nsis_pop(value);
	
	errnum = RegCreateKeyEx(
		HKEY_LOCAL_MACHINE,
		key,
		0,
		NULL,
		0,
		KEY_READ | KEY_WRITE,
		NULL,
		&regkey,
		NULL
	);
	if(errnum != ERROR_SUCCESS) {
		return;
	}
	
	errnum = RegQueryValueEx(regkey, name, NULL, NULL, NULL, NULL);
	if(errnum != ERROR_FILE_NOT_FOUND) {
		goto END;
	}
	
	if(strcmp(type, "dword") == 0) {
		dwval = atoi(value);
		RegSetValueEx(regkey, name, 0, REG_DWORD, (BYTE*)&dwval, sizeof(dwval));
	}else{
		RegSetValueEx(regkey, name, 0, REG_SZ, (BYTE*)value, strlen(value)+1);
	}
	
	END:
	RegCloseKey(regkey);
}