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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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: Go Kudo <zeriyoshi@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "php_random.h"
static php_random_result generate(void *state)
{
php_random_status_state_user *s = state;
uint64_t result = 0;
size_t size;
zval retval;
zend_string *zstr;
zend_call_known_instance_method_with_0_params(s->generate_method, s->object, &retval);
if (EG(exception)) {
return (php_random_result){
.size = sizeof(uint64_t),
.result = 0,
};
}
if (UNEXPECTED(Z_ISREF(retval))) {
zstr = Z_STR_P(Z_REFVAL(retval));
} else {
zstr = Z_STR(retval);
}
/* Store generated size in a state */
size = ZSTR_LEN(zstr);
/* Guard for over 64-bit results */
if (size > sizeof(uint64_t)) {
size = sizeof(uint64_t);
}
if (size > 0) {
/* Endianness safe copy */
for (size_t i = 0; i < size; i++) {
result += ((uint64_t) (unsigned char) ZSTR_VAL(zstr)[i]) << (8 * i);
}
} else {
zend_throw_error(random_ce_Random_BrokenRandomEngineError, "A random engine must return a non-empty string");
zval_ptr_dtor(&retval);
return (php_random_result){
.size = sizeof(uint64_t),
.result = 0,
};
}
zval_ptr_dtor(&retval);
return (php_random_result){
.size = size,
.result = result,
};
}
static zend_long range(void *state, zend_long min, zend_long max)
{
return php_random_range((php_random_algo_with_state){
.algo = &php_random_algo_user,
.state = state,
}, min, max);
}
PHPAPI const php_random_algo php_random_algo_user = {
sizeof(php_random_status_state_user),
generate,
range,
NULL,
NULL,
};
|