Add FFI support for constants with C-compatible functions

2 files changed, 27 insertions, 0 deletions

diff --git a/ffi/Cargo.toml b/ffi/Cargo.toml
new file mode 100644
index 0000000..5d1e562
--- /dev/null
+++ b/ffi/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "jvlib"
+edition = "2024"
+version.workspace = true
+
+[lib]
+crate-type = ["cdylib", "staticlib"]
+name = "jvlib"
+
+[dependencies]
+libc = "0.2"
+
+# FFI Import
+constants = { path = "../systems/_constants" }
diff --git a/ffi/src/lib.rs b/ffi/src/lib.rs
new file mode 100644
index 0000000..7ffcb00
--- /dev/null
+++ b/ffi/src/lib.rs
@@ -0,0 +1,13 @@
+// Export constants functions
+pub use constants::*;
+
+#[unsafe(no_mangle)]
+#[allow(nonstandard_style)]
+pub extern "C" fn JV_FreeString(ptr: *mut libc::c_char) {
+    if ptr.is_null() {
+        return;
+    }
+    unsafe {
+        drop(std::ffi::CString::from_raw(ptr));
+    }
+}