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pub mod wasmedge_wasi_helper {
#[no_mangle]
pub fn _initialize() {
extern "C" {
fn __wasm_call_ctors();
}
static mut INITED: bool = false;
if unsafe { INITED } {
return;
}
unsafe { __wasm_call_ctors() };
unsafe { INITED = true };
}
pub fn get_bytes_from_caller() -> Result<Vec<u8>, &'static str> {
let path = match std::env::var("WASMEDGE_DATA_TO_CALLEE") {
Err(_) => Err("No data found from caller. Please check the WASMEDGE_DATA_TO_CALLEE is set"),
Ok(val) => Ok(val),
};
match std::fs::read(&path.unwrap()) {
Err(err) => {
eprintln!("Failed to open file. Due to: {:?}", err);
return Err("Cannot retrieve data from caller");
},
Ok(buf) => Ok(buf),
}
}
pub fn get_string_from_caller() -> Result<String, &'static str> {
let path = match std::env::var("WASMEDGE_DATA_TO_CALLEE") {
Err(_) => Err("No data found from caller. Please check the WASMEDGE_DATA_TO_CALLEE is set"),
Ok(val) => Ok(val),
};
match std::fs::read(&path.unwrap()) {
Err(err) => {
eprintln!("Failed to open file. Due to: {:?}", err);
return Err("Cannot retrieve data from caller");
},
Ok(buf) => Ok(String::from_utf8_lossy(&buf).to_string()),
}
}
pub fn send_string_to_caller(s: &str) -> std::io::Result<()> {
let path = match std::env::var("WASMEDGE_DATA_FROM_CALLEE") {
Err(_) => Err("Cannot find path from caller. Please check the WASMEDGE_DATA_FROM_CALLEE is set"),
Ok(val) => Ok(val),
};
std::fs::write(&path.unwrap(), s)?;
Ok(())
}
pub fn send_bytes_to_caller(bytes: &Vec<u8>) -> std::io::Result<()> {
let path = match std::env::var("WASMEDGE_DATA_FROM_CALLEE") {
Err(_) => Err("Cannot find path from caller. Please check the WASMEDGE_DATA_FROM_CALLEE is set"),
Ok(val) => Ok(val),
};
std::fs::write(&path.unwrap(), bytes)?;
Ok(())
}
}