use std::ffi::{CString, CStr};
use std::os::raw::{c_char};
#[macro_export]
macro_rules! wasmblock_setup {
() => {
#[no_mangle]
pub extern fn alloc(size: usize) -> *mut c_void {
let mut buf = Vec::with_capacity(size);
let ptr = buf.as_mut_ptr();
mem::forget(buf);
return ptr as *mut c_void;
}
#[no_mangle]
pub extern fn dealloc_str(ptr: *mut c_char) {
unsafe {
let _ = CString::from_raw(ptr);
}
}
};
}
pub fn import_string(data: *mut c_char) -> String{
unsafe {
CStr::from_ptr(data).to_string_lossy().into_owned()
}
}
pub fn export_string<T:Into<std::vec::Vec<u8>>>(s:T) -> *const c_char{
let s = CString::new(s).unwrap();
let p = s.as_ptr();
std::mem::forget(s);
return p;
}