Function divCeil [src]

Divide numerator by denominator, rounding toward positive infinity. Returns an error on overflow or when denominator is zero.

Prototype

pub fn divCeil(comptime T: type, numerator: T, denominator: T) !T

Parameters

T: typenumerator: Tdenominator: T

Example

 test divCeil {
    try testDivCeil();
    try comptime testDivCeil();
}

Source

  pub fn divCeil(comptime T: type, numerator: T, denominator: T) !T {
    @setRuntimeSafety(false);
    if (denominator == 0) return error.DivisionByZero;
    const info = @typeInfo(T);
    switch (info) {
        .comptime_float, .float => return @ceil(numerator / denominator),
        .comptime_int, .int => {
            if (numerator < 0 and denominator < 0) {
                if (info == .int and numerator == minInt(T) and denominator == -1)
                    return error.Overflow;
                return @divFloor(numerator + 1, denominator) + 1;
            }
            if (numerator > 0 and denominator > 0)
                return @divFloor(numerator - 1, denominator) + 1;
            return @divTrunc(numerator, denominator);
        },
        else => @compileError("divCeil unsupported on " ++ @typeName(T)),
    }
}  