Finish engineHEADmain

1 files changed, 48 insertions, 0 deletions

diff --git a/platforms/tortuise-script-wasm/src/script.rs b/platforms/tortuise-script-wasm/src/script.rs
new file mode 100644
index 0000000..ee4d91d
--- /dev/null
+++ b/platforms/tortuise-script-wasm/src/script.rs
@@ -0,0 +1,48 @@
+use core::alloc::Layout;
+
+use alloc::string::String;
+
+use crate::ScriptContext;
+
+mod tortuise {
+	#[link(wasm_import_module = "tortuise")]
+	unsafe extern "C" {
+		pub safe fn script_name_size(context: u64) -> usize;
+		pub unsafe fn load_script_name(context: u64, offset: *const u8);
+		pub unsafe fn script_id_by_name(context: u64, name: *const u8, length: usize) -> usize;
+		pub safe fn activate_script(context: u64, id: usize);
+		pub safe fn deactivate_script(context: u64, id: usize);
+	}
+}
+
+impl ScriptContext<'_> {
+	pub fn current_script_name(&self) -> String {
+		// safety: the length is correct and the string will fit into offset
+		unsafe {
+			let len = tortuise::script_name_size(self.0);
+			if len == 0 {
+				return String::new();
+			}
+			let offset = alloc::alloc::alloc(Layout::array::<u8>(len).unwrap());
+			tortuise::load_script_name(self.0, offset);
+			String::from_raw_parts(offset, len, len)
+		}
+	}
+
+	pub fn script_id(&self, name: &str) -> Option<usize> {
+		let id = unsafe { tortuise::script_id_by_name(self.0, name.as_ptr(), name.len()) };
+		(id < usize::MAX).then_some(id)
+	}
+
+	pub fn activate_script(&mut self, name: &str) -> Option<()> {
+		let id = self.script_id(name)?;
+		tortuise::activate_script(self.0, id);
+		Some(())
+	}
+
+	pub fn deactivate_script(&mut self, name: &str) -> Option<()> {
+		let id = self.script_id(name)?;
+		tortuise::deactivate_script(self.0, id);
+		Some(())
+	}
+}