71 lines
2.5 KiB
Rust
71 lines
2.5 KiB
Rust
use super::value::{Value, NestedValue, Domain, IOValue, UnwrappedIOValue, Float, Double};
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use super::signed_integer::SignedIntegerRepr;
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use super::writer::Writer;
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pub use super::writer::Result;
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pub struct Encoder<'a, W: Writer> {
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pub write: &'a mut W,
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}
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pub fn encode_bytes(v: &IOValue) -> std::io::Result<Vec<u8>> {
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let mut buf: Vec<u8> = Vec::new();
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Encoder::new(&mut buf).write(v)?;
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Ok(buf)
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}
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impl<'a, W: Writer> Encoder<'a, W> {
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pub fn new(write: &'a mut W) -> Self {
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Encoder { write }
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}
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pub fn write(&mut self, v: &IOValue) -> Result {
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match v.annotations().maybe_slice() {
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None => (),
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Some(anns) => for ann in anns {
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self.write.write_annotation_prefix()?;
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self.write(ann)?;
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}
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}
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self.write_value(v.value())
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}
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pub fn write_value(&mut self, v: &UnwrappedIOValue) -> Result {
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match v {
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Value::Boolean(b) => self.write.write_bool(*b),
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Value::Float(Float(f)) => self.write.write_f32(*f),
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Value::Double(Double(d)) => self.write.write_f64(*d),
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Value::SignedInteger(n) => match n.repr() {
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SignedIntegerRepr::I128(i) => self.write.write_i128(*i),
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SignedIntegerRepr::U128(u) => self.write.write_u128(*u),
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SignedIntegerRepr::Big(ref n) => self.write.write_int(n),
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}
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Value::String(ref s) => self.write.write_string(s),
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Value::ByteString(ref bs) => self.write.write_bytes(bs),
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Value::Symbol(ref s) => self.write.write_symbol(s),
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Value::Record(r) => {
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self.write.open_record(r.arity())?;
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self.write(r.label())?;
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for f in r.fields() { self.write(f)?; }
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self.write.close_record()
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}
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Value::Sequence(ref vs) => {
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self.write.open_sequence(vs.len())?;
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for v in vs { self.write(v)?; }
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self.write.close_sequence()
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}
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Value::Set(ref vs) => {
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self.write.open_set(vs.len())?;
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for v in vs { self.write(v)?; }
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self.write.close_set()
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}
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Value::Dictionary(ref vs) => {
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self.write.open_dictionary(vs.len())?;
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for (k, v) in vs { self.write(k)?; self.write(v)?; }
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self.write.close_dictionary()
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}
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Value::Domain(ref d) => self.write(&d.as_preserves()?)
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}
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}
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}
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