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|
use proc_macro::{ TokenStream, TokenTree, Ident };
#[path = "../../../../guests_macro/src/parse_fn.rs"]
mod parse_fn;
use crate::parse_fn::{ split_fn, args_divide_grouped, args_divide_public, group_streams };
use toml::Table;
fn insert_reads(out: &mut TokenStream, patterns: &Vec<TokenStream>, types: &Vec<TokenStream>, readfn: &str) {
for i in 0..patterns.len() {
let type_note: String = format!("{}", types[i])
.replace('<', "[")
.replace('>', "]");
out.extend(format!("let {} : {} = read!({} {});", patterns[i], types[i], readfn, type_note).parse::<TokenStream>());
}
}
#[proc_macro]
pub fn make_wrapper(item: TokenStream) -> TokenStream {
let (name, args, ret) = split_fn(&item);
let public_inputs = toml::from_str::<Table>(
include_str!(concat!(env!("INPUTS_DIR"), "/default_public_input.toml"))
)
.unwrap();
let ((pub_pat, pub_typ), (prv_pat, prv_typ)) = args_divide_public(&args, &public_inputs.keys().collect());
let mut out = TokenStream::new();
insert_reads(&mut out, &pub_pat, &pub_typ, "read_public");
insert_reads(&mut out, &prv_pat, &prv_typ, "read_private");
let (ts_patterns, _) = args_divide_grouped(&args);
out.extend(format!("
let result = zkp::{}{};
assert(result);
write(result as u64);
", name, ts_patterns).parse::<TokenStream>());
let mut block = TokenStream::new();
block.extend(format!("{{ {} }}", out).parse::<TokenStream>());
block
}
fn return_primitive(readfn: &TokenTree, typ: &Ident) -> TokenStream {
format!("
({readfn}() as {typ})
").parse().unwrap()
}
fn return_bool(readfn: &TokenTree) -> TokenStream {
format!("
({readfn}() != 0)
").parse().unwrap()
}
fn return_char(readfn: &TokenTree) -> TokenStream {
format!("
(({readfn}() as u8) as char)
").parse().unwrap()
}
fn return_string(readfn: &TokenTree) -> TokenStream {
format!("
{{
let mut ret = Vec::new();
let size = read!({readfn} usize);
for _ in 0..size {{
ret.push(read!({readfn} char));
}}
ret.into_iter().collect()
}}
").parse().unwrap()
}
fn return_array(readfn: &TokenTree, inner: &TokenStream) -> TokenStream {
format!("
{{
let mut ret = Vec::new();
let size = read!({readfn} usize);
for _ in 0..size {{
ret.push(read!({readfn} {inner}));
}}
ret.try_into().unwrap()
}}
").parse().unwrap()
}
fn return_cont(readfn: &TokenTree, container: &Ident, pushfn: &str, inner: &TokenStream) -> TokenStream {
format!("
{{
let mut ret = {container}::new();
let size = read!({readfn} usize);
for _ in 0..size {{
ret.{pushfn}(read!({readfn} {inner}));
}}
ret
}}
").parse().unwrap()
}
fn return_hashmap(readfn: &TokenTree, container: &Ident, inner: &TokenStream) -> TokenStream {
let mut inner = inner.clone().into_iter();
let key_type = inner.next().unwrap();
inner.next().unwrap();
let value_type = inner.next().unwrap();
format!(r#"
{{
let mut ret = {container}::new();
let size = read!({readfn} usize);
for _ in 0..size {{
ret.insert(read!({readfn} {key_type}), read!({readfn} {value_type}));
}}
ret
}}
"#).parse().unwrap()
}
fn return_tuple(readfn: &TokenTree, inner: &TokenStream) -> TokenStream {
let mut value = String::new();
for subtype in inner.clone().into_iter() {
value += &format!("read!({readfn} {subtype}), ");
}
format!("
{{
let _ = read!({readfn} usize);
( {value} )
}}
").parse().unwrap()
}
#[proc_macro]
pub fn read(item: TokenStream) -> TokenStream {
let mut parts = item.clone().into_iter();
let readfn = parts.next().unwrap();
match parts.next().unwrap() {
// Primitive or STD Container
TokenTree::Ident(ident) => {
match ident.to_string().as_str() {
"u8" | "u16" | "u32" | "u64" | "u128" | "usize" |
"i8" | "i16" | "i32" | "i64" | "i128" | "isize" |
"f32" | "f64" =>
return return_primitive(&readfn, &ident),
"char" =>
return return_char(&readfn),
"bool" =>
return return_bool(&readfn),
"String" =>
return return_string(&readfn),
_ => {},
}
let mut group = parts.next()
.expect(format!("No group after \"{ident}\" while parsing \"{item}\"!").as_str());
if let TokenTree::Group(inner_group) = group {
let rest = inner_group.stream();
match ident.to_string().as_str() {
// https://doc.rust-lang.org/std/collections/
"Vec" | "BinaryHeap" =>
return_cont(&readfn, &ident, "push", &rest),
"VecDeque" | "LinkedList" =>
return_cont(&readfn, &ident, "push_back", &rest),
"HashSet" | "BTreeSet" =>
return_cont(&readfn, &ident, "insert", &rest),
"HashMap" | "BTreeMap" =>
return_hashmap(&readfn, &ident, &rest),
_ => todo!("Unsupported container {ident}"),
}
}
else {
unreachable!("{group} is not a TokenTree::Group!");
}
},
// Array or tuple
TokenTree::Group(group) => {
let mut group = group.stream().into_iter();
let mut inner = TokenStream::new();
while let Some(current) = group.next() {
match current {
TokenTree::Punct(punct) => match punct.as_char() {
// Array
';' =>
return return_array(&readfn, &inner),
// Tuple
',' => continue,
_ => unreachable!("Group contains unexpected \"{punct}\""),
},
TokenTree::Ident(_) | TokenTree::Group(_) =>
inner.extend([current].into_iter()),
_ => unreachable!(),
}
}
return_tuple(&readfn, &inner)
},
_ => unreachable!(),
}
}
|
