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function bcround (val, precision) {
// http://jsphp.co/jsphp/fn/view/bcround
// + original by: lmeyrick (https://sourceforge.net/projects/bcmath-js/)
// - depends on: _phpjs_shared_bc
// * example 1: bcround(1, 2);
// * returns 1: 3
// @todo: implement these testcases
// bcscale(0);
//
// bcmath.test.result('bcround', 1, '-2', bcround('-1.5', 0));
// bcmath.test.result('bcround', 2, '-1.1235', bcround('-1.1234567', 4));
// bcmath.test.result('bcround', 3, '2', bcround('1.5', 0));
// bcmath.test.result('bcround', 4, '1.1235', bcround('1.1234567', 4));
// bcmath.test.result('bcround', 5, '1', bcround('1.499999999', 0));
// bcmath.test.result('bcround', 6, '2', bcround('1.5555555555555555555', 0));
// bcmath.test.result('bcround', 7, '1.44', bcround('1.444999', 2));
// bcmath.test.result('bcround', 8, '-1.44', bcround('-1.444999', 2));
var libbcmath = this._phpjs_shared_bc();
var temp, result, digit;
var right_operand;
// create number
temp = libbcmath.bc_init_num();
temp = libbcmath.php_str2num(val.toString());
// check if any rounding needs
if (precision >= temp.n_scale) {
// nothing to round, just add the zeros.
while (temp.n_scale < precision) {
temp.n_value[temp.n_len + temp.n_scale] = 0;
temp.n_scale++;
}
return temp.toString();
}
// get the digit we are checking (1 after the precision)
// loop through digits after the precision marker
digit = temp.n_value[temp.n_len + precision];
right_operand = libbcmath.bc_init_num();
right_operand = libbcmath.bc_new_num(1, precision);
if (digit >= 5) {
//round away from zero by adding 1 (or -1) at the "precision".. ie 1.44999 @ 3dp = (1.44999 + 0.001).toString().substr(0,5)
right_operand.n_value[right_operand.n_len + right_operand.n_scale - 1] = 1;
if (temp.n_sign == libbcmath.MINUS) {
// round down
right_operand.n_sign = libbcmath.MINUS;
}
result = libbcmath.bc_add(temp, right_operand, precision);
} else {
// leave-as-is.. just truncate it.
result = temp;
}
if (result.n_scale > precision) {
result.n_scale = precision;
}
return result.toString();
}
