Zig 0.17.0-dev (Split by item)

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scanDigit

FloatStream.scanDigit

pub fn scanDigit(self: *FloatStream, comptime base: u8) ?u8

File

lib/std/fmt/parse_float/FloatStream.zig:97

Code

pub fn scanDigit(self: *FloatStream, comptime base: u8) ?u8 {
    comptime std.debug.assert(base == 10 or base == 16);

    retry: while (true) {
        if (self.first()) |ok| {
            if ('0' <= ok and ok <= '9') {
                self.advance(1);
                return ok - '0';
            } else if (base == 16 and 'a' <= ok and ok <= 'f') {
                self.advance(1);
                return ok - 'a' + 10;
            } else if (base == 16 and 'A' <= ok and ok <= 'F') {
                self.advance(1);
                return ok - 'A' + 10;
            } else if (ok == '_') {
                self.advance(1);
                self.underscore_count += 1;
                continue :retry;
            }
        }
        return null;
    }
}