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#include <stdio.h>
#include <stdint.h>
typedef long zend_long;
typedef double zend_double;
/* Mock of PHP zval struct */
typedef struct {
zend_long lval;
zend_double dval;
} zval;
/* Mock access macros */
#define Z_LVAL_P(z) ((z)->lval)
#define Z_DVAL_P(z) ((z)->dval)
int main(void) {
zval _op1 = {123456789, 0.0};
zval _op2 = {987654321, 0.0};
zval _result = {0, 0.0};
int overflow = 0;
/* Pointers to simulate real PHP usage */
zval *op1 = &_op1;
zval *op2 = &_op2;
zval *result = &_result;
/* x86-64 version of ZEND_SIGNED_MULTIPLY_LONG */
#define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \
zend_long __tmpvar; \
__asm__ ("imul %3,%0\n" \
"adc $0,%1" \
: "=r"(__tmpvar), "=r"(usedval) \
: "0"(a), "r"(b), "1"(0)); \
if (usedval) (dval) = (double) (a) * (double) (b); \
else (lval) = __tmpvar; \
} while (0)
/* Perform the multiplication as PHP does */
ZEND_SIGNED_MULTIPLY_LONG(Z_LVAL_P(op1), Z_LVAL_P(op2),
Z_LVAL_P(result), Z_DVAL_P(result),
overflow);
/* Print result */
if (overflow)
printf("Overflow detected, double result: %f\n", Z_DVAL_P(result));
else
printf("Result fits in long: %ld\n", Z_LVAL_P(result));
return 0;
}
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