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app/expr: add native fn as an opcode

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darkfi
2026-01-06 17:02:38 +01:00
parent e30bd5d36e
commit 823038c327
1 changed files with 9 additions and 0 deletions
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9
bin/app/src/expr/mod.rs
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@@ -28,6 +28,9 @@ use std::io::{Read, Write};
mod compile; mod compile;
pub use compile::Compiler; pub use compile::Compiler;
pub type MachineGlobals = Vec<(String, SExprVal)>;
pub type NativeFnCallback = fn(&mut MachineGlobals) -> Result<SExprVal>;
pub fn const_f32(x: f32) -> SExprCode { pub fn const_f32(x: f32) -> SExprCode {
vec![Op::ConstFloat32(x)] vec![Op::ConstFloat32(x)]
} }
@@ -151,6 +154,7 @@ pub enum Op {
LessThan((Box<Op>, Box<Op>)), LessThan((Box<Op>, Box<Op>)),
Float32ToUint32(Box<Op>), Float32ToUint32(Box<Op>),
IfElse((Box<Op>, SExprCode, SExprCode)), IfElse((Box<Op>, SExprCode, SExprCode)),
NativeFn(NativeFnCallback),
} }
impl<'a> SExprMachine<'a> { impl<'a> SExprMachine<'a> {
@@ -183,6 +187,7 @@ impl<'a> SExprMachine<'a> {
Op::LessThan((lhs, rhs)) => self.less_than(lhs, rhs), Op::LessThan((lhs, rhs)) => self.less_than(lhs, rhs),
Op::Float32ToUint32(val) => self.float32_to_uint32(val), Op::Float32ToUint32(val) => self.float32_to_uint32(val),
Op::IfElse((cond, if_val, else_val)) => self.if_else(cond, if_val, else_val), Op::IfElse((cond, if_val, else_val)) => self.if_else(cond, if_val, else_val),
Op::NativeFn(f) => (*f)(&mut self.globals),
} }
} }
@@ -413,6 +418,9 @@ impl Encodable for Op {
len += if_val.encode(s)?; len += if_val.encode(s)?;
len += else_val.encode(s)?; len += else_val.encode(s)?;
} }
Self::NativeFn(_) => {
len += 17u8.encode(s)?;
}
} }
Ok(len) Ok(len)
} }
@@ -443,6 +451,7 @@ impl Decodable for Op {
Decodable::decode(d)?, Decodable::decode(d)?,
Decodable::decode(d)?, Decodable::decode(d)?,
)), )),
17 => Self::NativeFn(|_| Ok(SExprVal::Null)),
_ => return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid Op type")), _ => return Err(std::io::Error::new(std::io::ErrorKind::Other, "Invalid Op type")),
}; };
Ok(self_) Ok(self_)