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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>, inputs: &Table, readfn: &str) {
for i in 0..patterns.len() {
let mut value = &inputs[&patterns[i].to_string()];
let type_note: String = format!("{}", types[i])
.replace('<', "[")
.replace('>', "]")
.split("[")
.map(|x| x.trim())
.map(|typ|
// Array
if typ.is_empty() {
let array = value.as_array()
.expect("value is of type Array but isn't an array");
value = &array[0];
"[".to_string()
}
// STD Vec
else if typ.ends_with("Vec") {
let array = value.as_array()
.expect("value is of type Vec but isn't an array");
value = &array[0];
format!("{} [ {} ", typ, array.len())
}
else {
typ.to_string()
})
.collect();
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 private_inputs = toml::from_str::<Table>(
include_str!(concat!(env!("INPUTS_DIR"), "/default_private_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, &public_inputs, "read_public");
insert_reads(&mut out, &prv_pat, &prv_typ, &private_inputs, "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_array(readfn: &TokenTree, size: &TokenTree, inner: &TokenStream) -> TokenStream {
format!("
{{
let mut ret = Vec::new();
for _ in 0..{size} {{
ret.push(read!({readfn} {inner}));
}}
ret.try_into().unwrap()
}}
").parse().unwrap()
}
fn return_vec(readfn: &TokenTree, size: &TokenTree, inner: &TokenStream) -> TokenStream {
format!("
{{
let mut ret = Vec::new();
for _ in 0..{size} {{
ret.push(read!({readfn} {inner}));
}}
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!("( {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" |
"char" =>
return return_primitive(&readfn, &ident),
"bool" =>
return return_bool(&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 mut group = inner_group.stream().into_iter();
let size = group.next().unwrap();
let mut rest = TokenStream::new();
rest.extend(group);
match ident.to_string().as_str() {
"Vec" => return_vec(&readfn, &size, &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
';' => {
let size = group.next().unwrap();
return return_array(&readfn, &size, &inner);
},
// Tuple
',' => continue,
_ => unreachable!("Group contains unexpected \"{punct}\""),
},
TokenTree::Ident(_) | TokenTree::Group(_) =>
inner.extend([current].into_iter()),
_ => unreachable!(),
}
}
return_tuple(&readfn, &inner)
},
_ => unreachable!(),
}
}
|
