/* 
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2016 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.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.               |
   +----------------------------------------------------------------------+
   | Author: Sascha Schumann <sascha@schumann.cx>                         |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

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

ps_module ps_mod_user = {
	PS_MOD_SID(user)
};

#define SESS_ZVAL_LONG(val, a)						\
{													\
	MAKE_STD_ZVAL(a);								\
	ZVAL_LONG(a, val);								\
}

#define SESS_ZVAL_STRING(vl, a)						\
{													\
	char *__vl = vl;								\
	SESS_ZVAL_STRINGN(__vl, strlen(__vl), a);		\
}

#define SESS_ZVAL_STRINGN(vl, ln, a)				\
{													\
	MAKE_STD_ZVAL(a);								\
	ZVAL_STRINGL(a, vl, ln, 1);						\
}

static zval *ps_call_handler(zval *func, int argc, zval **argv TSRMLS_DC)
{
	int i;
	zval *retval = NULL;

	MAKE_STD_ZVAL(retval);
	if (call_user_function(EG(function_table), NULL, func, retval, argc, argv TSRMLS_CC) == FAILURE) {
		zval_ptr_dtor(&retval);
		retval = NULL;
	}

	for (i = 0; i < argc; i++) {
		zval_ptr_dtor(&argv[i]);
	}

	return retval;
}

#define STDVARS								\
	zval *retval = NULL;					\
	int ret = FAILURE

#define PSF(a) PS(mod_user_names).name.ps_##a

#define FINISH								\
	if (retval) {							\
		convert_to_long(retval);			\
		ret = Z_LVAL_P(retval);				\
		zval_ptr_dtor(&retval);				\
	}										\
	return ret

PS_OPEN_FUNC(user)
{
	zval *args[2];
	STDVARS;
	
	if (PSF(open) == NULL) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING,
			"user session functions not defined");
			
		return FAILURE;
	}

	SESS_ZVAL_STRING((char*)save_path, args[0]);
	SESS_ZVAL_STRING((char*)session_name, args[1]);

	retval = ps_call_handler(PSF(open), 2, args TSRMLS_CC);
	PS(mod_user_implemented) = 1;

	FINISH;
}

PS_CLOSE_FUNC(user)
{
	zend_bool bailout = 0;
	STDVARS;

	if (!PS(mod_user_implemented)) {
		/* already closed */
		return SUCCESS;
	}

	zend_try {
		retval = ps_call_handler(PSF(close), 0, NULL TSRMLS_CC);
	} zend_catch {
		bailout = 1;
	} zend_end_try();

	PS(mod_user_implemented) = 0;

	if (bailout) {
		if (retval) {
			zval_ptr_dtor(&retval);
		}
		zend_bailout();
	}

	FINISH;
}

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

	SESS_ZVAL_STRING((char*)key, args[0]);

	retval = ps_call_handler(PSF(read), 1, args TSRMLS_CC);

	if (retval) {
		if (Z_TYPE_P(retval) == IS_STRING) {
			*val = estrndup(Z_STRVAL_P(retval), Z_STRLEN_P(retval));
			*vallen = Z_STRLEN_P(retval);
			ret = SUCCESS;
		}
		zval_ptr_dtor(&retval);
	}

	return ret;
}

PS_WRITE_FUNC(user)
{
	zval *args[2];
	STDVARS;

	SESS_ZVAL_STRING((char*)key, args[0]);
	SESS_ZVAL_STRINGN((char*)val, vallen, args[1]);

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

	FINISH;
}

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

	SESS_ZVAL_STRING((char*)key, args[0]);

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

	FINISH;
}

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

	SESS_ZVAL_LONG(maxlifetime, args[0]);

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

	FINISH;
}

PS_CREATE_SID_FUNC(user)
{
	/* maintain backwards compatibility */
	if (PSF(create_sid) != NULL) {
		char *id = NULL;
		zval *retval = NULL;

		retval = ps_call_handler(PSF(create_sid), 0, NULL TSRMLS_CC);

		if (retval) {
			if (Z_TYPE_P(retval) == IS_STRING) {
				id = estrndup(Z_STRVAL_P(retval), Z_STRLEN_P(retval));
			}
			zval_ptr_dtor(&retval);
		}
		else {
			php_error_docref(NULL TSRMLS_CC, E_ERROR, "No session id returned by function");
			return NULL;
		}

		if (!id) {
			php_error_docref(NULL TSRMLS_CC, E_ERROR, "Session id must be a string");
			return NULL;
		}

		return id;
	}

	/* function as defined by PS_MOD */
	return php_session_create_id(mod_data, newlen TSRMLS_CC);
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: sw=4 ts=4 fdm=marker
 * vim<600: sw=4 ts=4
 */