Add WASM bindings

.gitignore

@@ -1,2 +1,3 @@
 /target
 /Cargo.lock
+/wasm

Cargo.toml

@@ -13,5 +13,15 @@ repository = "https://github.com/wezm/rsspls.git"
 readme = "README.md"
 license = "Apache-2.0"
 
+[lib]
+# cdylib is for WASM
+crate-type = ["cdylib", "rlib"]
+
 [dependencies]
 crc = "3.0.1"
+
+[target.'cfg(target_family = "wasm")'.dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde-wasm-bindgen = "0.5"
+serde_bytes = "0.11.9"
+wasm-bindgen = "0.2.84"

Makefile

@@ -0,0 +1,9 @@
+all: wasm/macbinary.js
+
+wasm/macbinary.js: target/wasm32-unknown-unknown/release/macbinary.wasm
+	wasm-bindgen target/wasm32-unknown-unknown/release/macbinary.wasm --target web --out-dir wasm
+
+target/wasm32-unknown-unknown/release/macbinary.wasm:
+	cargo build --lib --target wasm32-unknown-unknown --release
+
+.PHONY: target/wasm32-unknown-unknown/release/macbinary.wasm

src/lib.rs

@@ -27,6 +27,8 @@ mod macroman;
 mod resource;
 #[cfg(test)]
 mod test;
+#[cfg(target_family = "wasm")]
+mod wasm;
 
 const MBIN_SIG: u32 = u32::from_be_bytes(*b"mBIN");
 

src/wasm.rs

@@ -0,0 +1,31 @@
+use serde::{Deserialize, Serialize};
+use wasm_bindgen::prelude::*;
+
+use crate::ParseError;
+
+#[derive(Serialize, Deserialize)]
+struct MacBinaryFile {
+    name: String,
+    #[serde(with = "serde_bytes")]
+    data_fork: Vec<u8>,
+    #[serde(with = "serde_bytes")]
+    rsrc_fork: Vec<u8>,
+}
+
+#[wasm_bindgen]
+pub fn parse_macbinary(data: &[u8]) -> Result<JsValue, JsValue> {
+    let file = crate::parse(data)?;
+    let res = MacBinaryFile {
+        name: file.filename(),
+        data_fork: file.data_fork().to_vec(),
+        rsrc_fork: file.resource_fork_raw().to_vec(),
+    };
+    let js = serde_wasm_bindgen::to_value(&res)?;
+    Ok(js)
+}
+
+impl From<ParseError> for JsValue {
+    fn from(err: ParseError) -> JsValue {
+        JsValue::from(err.to_string())
+    }
+}