use core::str;
use ocaml_sys::{caml_alloc, store_field};
use crate::{
memory::{
alloc_bytes, alloc_cons, alloc_double, alloc_int32, alloc_int64, alloc_some, alloc_string,
alloc_tuple, OCamlRef,
},
mlvalues::{
tag, OCamlBytes, OCamlFloat, OCamlInt, OCamlInt32, OCamlInt64, OCamlList, RawOCaml, FALSE,
NONE, TRUE,
},
runtime::OCamlRuntime,
value::OCaml,
BoxRoot,
};
pub unsafe trait ToOCaml<T> {
fn to_boxroot(&self, cr: &mut OCamlRuntime) -> BoxRoot<T> {
BoxRoot::new(self.to_ocaml(cr))
}
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, T>;
}
unsafe impl<'root, T> ToOCaml<T> for OCamlRef<'root, T> {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, T> {
unsafe { OCaml::new(cr, self.get_raw()) }
}
}
unsafe impl ToOCaml<()> for () {
fn to_ocaml(&self, _cr: &mut OCamlRuntime) -> OCaml<'static, ()> {
OCaml::unit()
}
}
unsafe impl ToOCaml<OCamlInt> for i64 {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlInt> {
unsafe { OCaml::new(cr, ((self << 1) | 1) as RawOCaml) }
}
}
unsafe impl ToOCaml<OCamlInt> for i32 {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlInt> {
(*self as i64).to_ocaml(cr)
}
}
unsafe impl ToOCaml<OCamlInt32> for i32 {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlInt32> {
alloc_int32(cr, *self)
}
}
unsafe impl ToOCaml<OCamlInt64> for i64 {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlInt64> {
alloc_int64(cr, *self)
}
}
unsafe impl ToOCaml<OCamlFloat> for f64 {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlFloat> {
alloc_double(cr, *self)
}
}
unsafe impl ToOCaml<bool> for bool {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, bool> {
unsafe { OCaml::new(cr, if *self { TRUE } else { FALSE }) }
}
}
unsafe impl ToOCaml<String> for &str {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, String> {
alloc_string(cr, self)
}
}
unsafe impl ToOCaml<OCamlBytes> for &str {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlBytes> {
alloc_bytes(cr, self.as_bytes())
}
}
unsafe impl ToOCaml<OCamlBytes> for &[u8] {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlBytes> {
alloc_bytes(cr, self)
}
}
unsafe impl ToOCaml<String> for &[u8] {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, String> {
alloc_string(cr, unsafe { str::from_utf8_unchecked(self) })
}
}
unsafe impl ToOCaml<String> for String {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, String> {
self.as_str().to_ocaml(cr)
}
}
unsafe impl ToOCaml<OCamlBytes> for String {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlBytes> {
self.as_str().to_ocaml(cr)
}
}
unsafe impl ToOCaml<String> for Vec<u8> {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, String> {
self.as_slice().to_ocaml(cr)
}
}
unsafe impl ToOCaml<OCamlBytes> for Vec<u8> {
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlBytes> {
self.as_slice().to_ocaml(cr)
}
}
unsafe impl<A, OCamlA> ToOCaml<OCamlA> for Box<A>
where
A: ToOCaml<OCamlA>,
{
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlA> {
self.as_ref().to_ocaml(cr)
}
}
unsafe impl<A, OCamlA: 'static> ToOCaml<Option<OCamlA>> for Option<A>
where
A: ToOCaml<OCamlA>,
{
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, Option<OCamlA>> {
if let Some(value) = self {
let ocaml_value = value.to_boxroot(cr);
alloc_some(cr, &ocaml_value)
} else {
unsafe { OCaml::new(cr, NONE) }
}
}
}
unsafe impl<A, OCamlA, Err, OCamlErr> ToOCaml<Result<OCamlA, OCamlErr>> for Result<A, Err>
where
A: ToOCaml<OCamlA>,
Err: ToOCaml<OCamlErr>,
{
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, Result<OCamlA, OCamlErr>> {
match self {
Ok(value) => {
let ocaml_ok = unsafe { caml_alloc(1, tag::TAG_OK) };
let ocaml_value = value.to_ocaml(cr);
unsafe { store_field(ocaml_ok, 0, ocaml_value.get_raw()) };
unsafe { OCaml::new(cr, ocaml_ok) }
}
Err(error) => {
let ocaml_err = unsafe { caml_alloc(1, tag::TAG_ERROR) };
let ocaml_error = error.to_ocaml(cr);
unsafe { store_field(ocaml_err, 0, ocaml_error.get_raw()) };
unsafe { OCaml::new(cr, ocaml_err) }
}
}
}
}
unsafe impl<A, OCamlA: 'static> ToOCaml<OCamlList<OCamlA>> for Vec<A>
where
A: ToOCaml<OCamlA>,
{
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, OCamlList<OCamlA>> {
let mut result = BoxRoot::new(OCaml::nil());
for elt in self.iter().rev() {
let ov = elt.to_boxroot(cr);
let cons = alloc_cons(cr, &ov, &result);
result.keep(cons);
}
cr.get(&result)
}
}
macro_rules! tuple_to_ocaml {
($($n:tt: $t:ident => $ot:ident),+) => {
unsafe impl<$($t),+, $($ot: 'static),+> ToOCaml<($($ot),+)> for ($($t),+)
where
$($t: ToOCaml<$ot>),+
{
fn to_ocaml<'a>(&self, cr: &'a mut OCamlRuntime) -> OCaml<'a, ($($ot),+)> {
let len = $crate::count_fields!($($t)*);
unsafe {
let ocaml_tuple: BoxRoot<($($ot),+)> = BoxRoot::new(alloc_tuple(cr, len));
$(
let field_val = self.$n.to_ocaml(cr).get_raw();
store_field(ocaml_tuple.get(cr).raw(), $n, field_val);
)+
cr.get(&ocaml_tuple)
}
}
}
};
}
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD,
4: E => OCamlE);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD,
4: E => OCamlE,
5: F => OCamlF);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD,
4: E => OCamlE,
5: F => OCamlF,
6: G => OCamlG);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD,
4: E => OCamlE,
5: F => OCamlF,
6: G => OCamlG,
7: H => OCamlH);
tuple_to_ocaml!(
0: A => OCamlA,
1: B => OCamlB,
2: C => OCamlC,
3: D => OCamlD,
4: E => OCamlE,
5: F => OCamlF,
6: G => OCamlG,
7: H => OCamlH,
8: I => OCamlI);