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August 17, 2016 09:28
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stupid xor swap try
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PHP_FUNCTION(strrev) | |
{ | |
zend_string *str; | |
char *e, *p; | |
zend_string *n; | |
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &str) == FAILURE) { | |
return; | |
} | |
n = zend_string_alloc(ZSTR_LEN(str), 0); | |
for (p = ZSTR_VAL(n), e = ZSTR_VAL(str) + ZSTR_LEN(str) - 1; e > p; ++p, --e) { | |
*p ^= *e; | |
*e ^= *p; | |
*p ^= *e; | |
} | |
RETVAL_NEW_STR(n); | |
} | |
/* {{{ proto string strrev(string str) | |
Reverse a string | |
PHP_FUNCTION(strrev) | |
{ | |
zend_string *str; | |
char *e, *p; | |
zend_string *n; | |
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &str) == FAILURE) { | |
return; | |
} | |
n = zend_string_alloc(ZSTR_LEN(str), 0); | |
p = ZSTR_VAL(n); | |
e = ZSTR_VAL(str) + ZSTR_LEN(str); | |
while (--e >= ZSTR_VAL(str)) { | |
*p++ = *e; | |
} | |
*p = '\0'; | |
RETVAL_NEW_STR(n); | |
} | |
/* }}} */ |
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