From 5d2747e26f51cc2344a6bd95f93457248fdfebd8 Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Thu, 29 Feb 2024 17:04:28 -0500
Subject: fin prob

---
 matrix-lang/src/binary/deserialize.rs | 160 ++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 matrix-lang/src/binary/deserialize.rs

(limited to 'matrix-lang/src/binary/deserialize.rs')

diff --git a/matrix-lang/src/binary/deserialize.rs b/matrix-lang/src/binary/deserialize.rs
new file mode 100644
index 0000000..679f6e5
--- /dev/null
+++ b/matrix-lang/src/binary/deserialize.rs
@@ -0,0 +1,160 @@
+use crate::prelude::*;
+
+use super::{prim::VarInt, Deserialize, Deserializer};
+
+macro_rules! error {
+    ($($arg:tt)*) => {
+        exception!(BINARY_EXCEPTION, $($arg)*)
+    };
+}
+
+impl Deserialize for Program {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        for _ in 0..5 { s.read::<u8>()?; } // skip header
+        let version: u8 = s.read()?;
+        if version != 0 {
+            return Err(error!("invalid program version {version}"))
+        }
+        let fun = <Rc<Function>>::deserialize(s)?;
+        Ok(Self { version, fun })
+    }
+}
+
+impl Deserialize for Instruction {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        use Instruction as I;
+        let ins: u8 = s.read()?;
+        let ins = match ins {
+            0  => I::NoOp,
+            1  => I::CreateLocal,
+            2  => I::LoadLocal(s.read()?),
+            3  => I::StoreLocal(s.read()?),
+            4  => I::DiscardLocals(s.read()?),
+            5  => I::LoadGlobal(s.read()?),
+            6  => I::StoreGlobal(s.read()?),
+            7  => I::Const(s.read()?),
+            8  => I::Int(s.read()?),
+            9  => I::True,
+            10 => I::False,
+            11 => I::Nil,
+            12 => I::Dup,
+            13 => I::Discard(s.read()?),
+            14 => I::UnaryOp(UnaryOp::try_from(s.read::<u8>()?)?),
+            15 => I::BinaryOp(BinaryOp::try_from(s.read::<u8>()?)?),
+            16 => I::NewList(s.read()?),
+            17 => I::NewTable(s.read()?),
+            18 => I::NewMatrix(s.read()?, s.read()?),
+            19 => I::Field(s.read()?),
+            20 => I::StoreField(s.read()?),
+            21 => I::Index(s.read()?),
+            22 => I::StoreIndex(s.read()?),
+            23 => I::Jump(s.read()?),
+            24 => I::JumpTrue(s.read()?),
+            25 => I::JumpFalse(s.read()?),
+            26 => I::JumpNil(s.read()?),
+            27 => I::IterCreate,
+            28 => I::IterNext,
+            29 => I::Try(s.read()?),
+            30 => I::TryEnd,
+            31 => I::Call(s.read()?),
+            32 => I::Return,
+            n => return Err(error!("invalid instruction op code {n}"))
+        };
+        Ok(ins)
+    }
+}
+
+impl<T: Deserialize> Deserialize for Vec<T> {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        let len = s.read::<VarInt>()?.0;
+        let mut vec = Vec::with_capacity(len);
+        for _ in 0..len {
+            let v = T::deserialize(s)?;
+            vec.push(v);
+        }
+        Ok(vec)
+    }
+}
+
+impl<T: Deserialize> Deserialize for Gc<T> {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        Ok(Gc::new(T::deserialize(s)?))
+    }
+}
+
+impl<T: Deserialize> Deserialize for Rc<T> {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        Ok(Rc::new(T::deserialize(s)?))
+    }
+}
+
+impl Deserialize for Position {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        let row = s.read::<VarInt>()?.0;
+        let col = s.read::<VarInt>()?.0;
+        Ok(Self { row, col })
+    }
+}
+
+impl Deserialize for Chunk {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        let constants = <Vec<Value>>::deserialize(s)?;
+        let code = <Vec<Instruction>>::deserialize(s)?;
+        let pos = <Vec<Position>>::deserialize(s)?;
+        Ok(Self { constants, code, pos })
+    }
+}
+
+impl Deserialize for Value {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        use Value as V;
+        let ty = s.read::<u8>()?;
+        let value = match ty {
+            0  => V::Nil,
+            1  => V::Bool(s.read()?),
+            2  => V::Int(s.read()?),
+            3  => V::Float(s.read()?),
+            4  => V::Ratio(Rational64::new(s.read()?, s.read()?)),
+            5  => V::Complex(Complex64::new(s.read()?, s.read()?)),
+            6  => V::to_regex(s.read::<String>()?.as_str())?,
+            7  => V::String(s.read::<String>()?.into()),
+            8  => V::List(<Vec<Value>>::deserialize(s)?.into()),
+            9  => {
+                let domain = s.read()?;
+                let codomain = s.read()?;
+                let values = <Vec<Value>>::deserialize(s)?;
+                V::Matrix(Matrix::new(domain, codomain, values).into())
+            },
+            10 => {
+                let len = s.read::<VarInt>()?.0;
+                let mut table = ValueMap::new();
+                for _ in 0..len {
+                    let key = <Value>::deserialize(s)?;
+                    let value = <Value>::deserialize(s)?;
+                    table.insert(key, value)?;
+                }
+                V::Table(table.into())
+            },
+            11 => V::Function(<Rc<Function>>::deserialize(s)?),
+            12 => V::Range((s.read()?, s.read()?, s.read()?).into()),
+            13 => V::Iter(<Rc<Function>>::deserialize(s)?),
+            n  => return Err(error!("invalid value code {n}"))
+        };
+        Ok(value)
+    }
+}
+
+impl Deserialize for Function {
+    fn deserialize<S: Deserializer>(s: &mut S) -> Result<Self> {
+        let name = s.read::<String>()?;
+        let arity = s.read()?;
+        let variadic = s.read()?;
+        let chunk = <Chunk>::deserialize(s)?;
+        Ok(Function {
+            name: Rc::from(name.as_str()),
+            arity,
+            variadic,
+            fun: InnerFunction::Compiled(chunk.into())
+        })
+    }
+}
-- 
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