/* 
   +----------------------------------------------------------------------+
   | PHP version 4.0                                                      |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997, 1998, 1999, 2000 The PHP Group                   |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.0 of the PHP license,       |
   | that is bundled with this package in the file LICENSE, and is        |
   | available at through the world-wide-web at                           |
   | http://www.php.net/license/2_0.txt.                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Sascha Schumann <ss@2ns.de>                                 |
   +----------------------------------------------------------------------+
 */

#include "php.h"
#include "php_session.h"
#include "mod_user.h"

ps_module ps_mod_user = {
	PS_MOD(user)
};

#define SESS_ZVAL_LONG(val, a) 					\
{											\
	MAKE_STD_ZVAL(a); 						\
	a->type = IS_LONG; 						\
	a->value.lval = val; 					\
}

#define SESS_ZVAL_STRING(vl, a) 					\
{											\
	int len = strlen(vl); 					\
	MAKE_STD_ZVAL(a); 						\
	a->type = IS_STRING; 					\
	a->value.str.len = len; 				\
	a->value.str.val = estrndup(vl, len); 	\
}

#define SESS_ZVAL_STRINGN(vl, ln, a) 			\
{											\
	MAKE_STD_ZVAL(a); 						\
	a->type = IS_STRING; 					\
	a->value.str.len = ln; 					\
	a->value.str.val = estrndup(vl, ln); 	\
}


static zval *ps_call_handler(char *name, int argc, zval **argv)
{
	int i;
	zval *retval = NULL;
	ELS_FETCH();
	
	if(name && name[0] != '\0') {
		zval *func;

		SESS_ZVAL_STRING(name, func);
		MAKE_STD_ZVAL(retval);

		if(call_user_function(EG(function_table), NULL, func, retval, 
					argc, argv) == FAILURE) {
			zval_dtor(retval);
			efree(retval);
			retval = NULL;
		}
		zval_dtor(func);
		efree(func);
	}

	for(i = 0; i < argc; i++) {
		zval_dtor(argv[i]);
		efree(argv[i]);
	}

	return retval;
}

#define STDVARS 							\
	zval *retval; 							\
	int ret = FAILURE; 						\
	ps_user *mdata = PS_GET_MOD_DATA();		\
	if(!mdata) return FAILURE

#define PSF(a) mdata->name.ps_##a

#define FINISH 								\
	if(retval) {							\
		convert_to_long(retval);			\
		ret = retval->value.lval;			\
		zval_dtor(retval);					\
		efree(retval);						\
	} 										\
	return ret

PS_OPEN_FUNC(user)
{
	zval *args[2];
	STDVARS;
	
	SESS_ZVAL_STRING(save_path, args[0]);
	SESS_ZVAL_STRING(session_name, args[1]);
	
	retval = ps_call_handler(PSF(open), 2, args);
	
	FINISH;
}

PS_CLOSE_FUNC(user)
{
	int i;
	STDVARS;

	retval = ps_call_handler(PSF(close), 0, NULL);

	for(i = 0; i < 6; i++) {
		efree(mdata->names[i]);
	}
	efree(mdata);

	PS_SET_MOD_DATA(NULL);

	FINISH;
}

PS_READ_FUNC(user)
{
	zval *args[1];
	STDVARS;

	SESS_ZVAL_STRING(key, args[0]);

	retval = ps_call_handler(PSF(read), 1, args);
	
	if(retval) {
		if(retval->type == IS_STRING) {
			*val = estrndup(retval->value.str.val, retval->value.str.len);
			*vallen = retval->value.str.len;
			ret = SUCCESS;
		}
		zval_dtor(retval);
		efree(retval);
	}

	return ret;
}

PS_WRITE_FUNC(user)
{
	zval *args[2];
	STDVARS;
	
	SESS_ZVAL_STRING(key, args[0]);
	SESS_ZVAL_STRINGN(val, vallen, args[1]);

	retval = ps_call_handler(PSF(write), 2, args);

	FINISH;
}

PS_DESTROY_FUNC(user)
{
	zval *args[1];
	STDVARS;

	SESS_ZVAL_STRING(key, args[0]);

	retval = ps_call_handler(PSF(destroy), 1, args);

	FINISH;
}

PS_GC_FUNC(user)
{
	zval *args[1];
	STDVARS;

	SESS_ZVAL_LONG(maxlifetime, args[0]);

	retval = ps_call_handler(PSF(gc), 1, args);

	FINISH;
}