int
bc_divmod (bc_num num1, bc_num num2, bc_num *quot, bc_num *rem, int scale TSRMLS_DC)
{
bc_num quotient = NULL;
bc_num temp;
int rscale;
/* Check for correct numbers. */
if (bc_is_zero (num2 TSRMLS_CC)) return -1;
/* Calculate final scale. */
rscale = MAX (num1->n_scale, num2->n_scale+scale);
bc_init_num(&temp TSRMLS_CC);
/* Calculate it. */
bc_divide (num1, num2, &temp, scale TSRMLS_CC);
if (quot)
quotient = bc_copy_num (temp);
bc_multiply (temp, num2, &temp, rscale TSRMLS_CC);
bc_sub (num1, temp, rem, rscale);
bc_free_num (&temp);
if (quot)
{
bc_free_num (quot);
*quot = quotient;
}
return 0; /* Everything is OK. */
}
// subtract
BigNumber & BigNumber::operator-= (const BigNumber & n)
{
bc_num result = NULL;
bc_sub (num_, n.num_, &result, scale_);
bc_free_num (&num_);
num_ = result;
return *this;
} // end of BigNumber::operator-=
String f_bcsub(CStrRef left, CStrRef right, int64 scale /* = -1 */) {
if (scale < 0) scale = BCG(bc_precision);
bc_num first, second, result;
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
php_str2num(&first, (char*)left.data());
php_str2num(&second, (char*)right.data());
bc_sub(first, second, &result, scale);
if (result->n_scale > scale) {
result->n_scale = scale;
}
String ret(bc_num2str(result), AttachString);
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return ret;
}
static String HHVM_FUNCTION(bcsub, const String& left, const String& right,
int64_t scale /* = -1 */) {
if (scale < 0) scale = BCG(bc_precision);
bc_num first, second, result;
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
php_str2num(&first, (char*)left.data());
php_str2num(&second, (char*)right.data());
bc_sub(first, second, &result, scale);
if (result->n_scale > scale) {
result->n_scale = scale;
}
String ret(bc_num2str(result), AttachString);
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return ret;
}
