parseDigitsWithSignGenericCharacter

fn parseDigitsWithSignGenericCharacter(
    comptime T: type,
    comptime Char: type,
    noalias buf: [*:0]const Char,
    noalias maybe_end: ?*[*:0]const Char,
    base: u6,
    comptime sign: enum

File

Code

fn parseDigitsWithSignGenericCharacter(
    comptime T: type,
    comptime Char: type,
    noalias buf: [*:0]const Char,
    noalias maybe_end: ?*[*:0]const Char,
    base: u6,
    comptime sign: enum { pos, neg },
) error{Overflow}!T {
    assert(base >= 2 and base <= 36);

    var current = buf;
    defer if (maybe_end) |end| {
        end.* = current;
    };

    const add = switch (sign) {
        .pos => std.math.add,
        .neg => std.math.sub,
    };

    var value: T = 0;
    while (true) {
        const c: u8 = std.math.cast(u8, current[0]) orelse break;

        const digit: u6 = @intCast(std.fmt.charToDigit(c, base) catch break);
        defer current += 1;

        value = try std.math.mul(T, value, base);
        value = try add(T, value, digit);
    }

    return value;
}