Feature/wasi

Cargo.toml

@@ -20,6 +20,7 @@ javy-plugin-api = { version = "3.0.0", features = ["json"] }
 rand = "0.8.5"
 serde_json = "1.0.120"
 serde = { version = "1.0.215", features = ["derive"] }
+thiserror = "2.0.12"
 
 [profile.release]
 lto = true
@@ -29,4 +30,5 @@ opt-level = 3
 crypto = []
 fetch = []
 llm = []
-default = ["crypto", "fetch"]
+wasip1 = []
+default = ["crypto", "fetch", "wasip1"]

src/lib.rs

@@ -14,11 +14,14 @@ pub mod crypto;
 pub mod fetch;
 #[cfg(feature = "llm")]
 pub mod llm;
+#[cfg(feature = "wasip1")]
+pub mod wasi;
 
 #[cfg(feature = "crypto")]
 use crypto::bless_get_random_values;
 #[cfg(feature = "fetch")]
 use fetch::bless_fetch_request;
+
 #[cfg(feature = "llm")]
 use llm::bless_llm_plugin;
 
@@ -61,6 +64,36 @@ pub extern "C" fn initialize_runtime() {
                     )?,
                 )?;
 
+                #[cfg(feature = "wasip1")]
+                {
+                    macro_rules! bind {
+                        (function, $l: ident) => {
+                            let name = concat!("__javy_", stringify!($l));
+                            ctx.globals().set(
+                                name,
+                                Function::new(
+                                    ctx.clone(),
+                                    MutFn::new(move |cx, args| {
+                                        let (cx, args) = hold_and_release!(cx, args);
+                                        wasi::$l(hold!(cx.clone(), args))
+                                            .map_err(|e| to_js_error(cx, e))
+                                    }),
+                                )?,
+                            )?;
+                        };
+                    }
+                    bind!(function, wasi_preview1_open);
+                    bind!(function, wasi_preview1_fd_prestat_dir_name);
+                    bind!(function, wasi_preview1_path_create_directory);
+                    bind!(function, wasi_preview1_path_remove_directory);
+                    bind!(function, wasi_preview1_path_unlink_file);
+                    bind!(function, wasi_preview1_close);
+                    bind!(function, wasi_preview1_path_symlink);
+                    bind!(function, wasi_preview1_path_link);
+                    bind!(function, wasi_preview1_path_rename);
+                    bind!(function, wasi_preview1_path_filestat_get);
+                }
+
                 #[cfg(feature = "llm")]
                 ctx.globals().set(
                     "BlessLLM",
@@ -87,6 +120,8 @@ pub extern "C" fn initialize_runtime() {
                 ctx.eval::<(), _>(include_str!("crypto/crypto.js"))?;
                 #[cfg(feature = "fetch")]
                 ctx.eval::<(), _>(include_str!("fetch/fetch.js"))?;
+                #[cfg(feature = "wasip1")]
+                ctx.eval::<(), _>(include_str!("wasi/preview_1.js"))?;
                 Ok::<_, anyhow::Error>(())
             })
             .unwrap();

src/wasi/close.rs

@@ -0,0 +1,21 @@
+use anyhow::{anyhow, bail, Result};
+use javy_plugin_api::javy::{quickjs::Value, Args};
+
+use super::{preview_1, process_error};
+
+/// This function is used to close a file descriptor.
+/// `fd`: The file descriptor to close.
+pub fn wasi_preview1_close<'a>(args: Args<'a>) -> Result<Value<'a>> {
+    let (cx, args) = args.release();
+    let args_pat: &[Value<'_>] = &args.0;
+    let [fd, ..] = args_pat else {
+        bail!(
+            "close expects 1 parameter: the fd, Got: {} parameters.",
+            args.len()
+        );
+    };
+    let fd = fd.as_int().ok_or_else(|| anyhow!("fd must be a number"))?;
+    let rs = unsafe { preview_1::fd_close(fd) };
+    process_error(cx.clone(), rs)?;
+    Ok(Value::new_int(cx.clone(), rs))
+}