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use super::{der::*, writer::*, *};
use alloc::boxed::Box;
pub(crate) fn write_positive_integer(output: &mut dyn Accumulator, value: &Positive) {
let first_byte = value.first_byte();
let value = value.big_endian_without_leading_zero_as_input();
write_tlv(output, Tag::Integer, |output| {
if (first_byte & 0x80) != 0 {
output.write_byte(0);
}
write_copy(output, value)
})
}
pub(crate) fn write_all(tag: Tag, write_value: &dyn Fn(&mut dyn Accumulator)) -> Box<[u8]> {
let length = {
let mut length = LengthMeasurement::zero();
write_tlv(&mut length, tag, write_value);
length
};
let mut output = Writer::with_capacity(length);
write_tlv(&mut output, tag, write_value);
output.into()
}
fn write_tlv<F>(output: &mut dyn Accumulator, tag: Tag, write_value: F)
where
F: Fn(&mut dyn Accumulator),
{
let length: usize = {
let mut length = LengthMeasurement::zero();
write_value(&mut length);
length.into()
};
output.write_byte(tag as u8);
if length < 0x80 {
output.write_byte(length as u8);
} else if length < 0x1_00 {
output.write_byte(0x81);
output.write_byte(length as u8);
} else if length < 0x1_00_00 {
output.write_byte(0x82);
output.write_byte((length / 0x1_00) as u8);
output.write_byte(length as u8);
} else {
unreachable!();
};
write_value(output);
}