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mod alloc_util;
pub mod pointers;
use self::alloc_util::*;
use self::pointers::*;
use crate::bytesrepr::{deserialize, FromBytes, ToBytes};
use crate::ext_ffi;
use crate::key::{Key, UREF_SIZE};
use crate::value::{Contract, Value};
use alloc::collections::BTreeMap;
use alloc::string::String;
use alloc::vec::Vec;
use core::convert::{TryFrom, TryInto};
pub fn read<T>(u_ptr: UPointer<T>) -> T
where
T: TryFrom<Value>,
{
let key: Key = u_ptr.into();
let value = read_untyped(&key);
value
.try_into()
.map_err(|_| "T could not be derived from Value")
.unwrap()
}
fn read_untyped(key: &Key) -> Value {
let (key_ptr, key_size, _bytes) = to_ptr(key);
let value_size = unsafe { ext_ffi::read_value(key_ptr, key_size) };
let value_ptr = alloc_bytes(value_size);
let value_bytes = unsafe {
ext_ffi::get_read(value_ptr);
Vec::from_raw_parts(value_ptr, value_size, value_size)
};
deserialize(&value_bytes).unwrap()
}
pub fn write<T>(u_ptr: UPointer<T>, t: T)
where
Value: From<T>,
{
let key = u_ptr.into();
let value = t.into();
write_untyped(&key, &value)
}
fn write_untyped(key: &Key, value: &Value) {
let (key_ptr, key_size, _bytes) = to_ptr(key);
let (value_ptr, value_size, _bytes2) = to_ptr(value);
unsafe {
ext_ffi::write(key_ptr, key_size, value_ptr, value_size);
}
}
pub fn add<T>(u_ptr: UPointer<T>, t: T)
where
Value: From<T>,
{
let key = u_ptr.into();
let value = t.into();
add_untyped(&key, &value)
}
fn add_untyped(key: &Key, value: &Value) {
let (key_ptr, key_size, _bytes) = to_ptr(key);
let (value_ptr, value_size, _bytes2) = to_ptr(value);
unsafe {
ext_ffi::add(key_ptr, key_size, value_ptr, value_size);
}
}
pub fn new_uref<T>(init: T) -> UPointer<T>
where
Value: From<T>,
{
let key_ptr = alloc_bytes(UREF_SIZE);
let bytes = unsafe {
ext_ffi::new_uref(key_ptr);
Vec::from_raw_parts(key_ptr, UREF_SIZE, UREF_SIZE)
};
let key: Key = deserialize(&bytes).unwrap();
if let Key::URef(id) = key {
let value: Value = init.into();
write_untyped(&key, &value);
UPointer::new(id)
} else {
panic!("URef FFI did not return a URef!");
}
}
fn fn_bytes_by_name(name: &str) -> Vec<u8> {
let (name_ptr, name_size, _bytes) = str_ref_to_ptr(name);
let fn_size = unsafe { ext_ffi::serialize_function(name_ptr, name_size) };
let fn_ptr = alloc_bytes(fn_size);
unsafe {
ext_ffi::get_function(fn_ptr);
Vec::from_raw_parts(fn_ptr, fn_size, fn_size)
}
}
pub fn fn_by_name(name: &str, known_urefs: BTreeMap<String, Key>) -> Contract {
let bytes = fn_bytes_by_name(name);
Contract::new(bytes, known_urefs)
}
pub fn store_function(name: &str, known_urefs: BTreeMap<String, Key>) -> ContractPointer {
let bytes = fn_bytes_by_name(name);
let fn_hash = {
let mut tmp = [0u8; 32];
unsafe {
ext_ffi::function_address(tmp.as_mut_ptr());
}
tmp
};
let key = Key::Hash(fn_hash);
let value = Value::Contract(Contract::new(bytes, known_urefs));
write_untyped(&key, &value);
ContractPointer::Hash(fn_hash)
}
pub fn get_arg<T: FromBytes>(i: u32) -> T {
let arg_size = unsafe { ext_ffi::load_arg(i) };
let dest_ptr = alloc_bytes(arg_size);
let arg_bytes = unsafe {
ext_ffi::get_arg(dest_ptr);
Vec::from_raw_parts(dest_ptr, arg_size, arg_size)
};
deserialize(&arg_bytes).unwrap()
}
pub fn get_uref(name: &str) -> Key {
let (name_ptr, name_size, _bytes) = str_ref_to_ptr(name);
let dest_ptr = alloc_bytes(UREF_SIZE);
let uref_bytes = unsafe {
ext_ffi::get_uref(name_ptr, name_size, dest_ptr);
Vec::from_raw_parts(dest_ptr, UREF_SIZE, UREF_SIZE)
};
deserialize(&uref_bytes).unwrap()
}
pub fn has_uref(name: &str) -> bool {
let (name_ptr, name_size, _bytes) = str_ref_to_ptr(name);
let result = unsafe { ext_ffi::has_uref_name(name_ptr, name_size) };
result == 0
}
pub fn add_uref(name: &str, key: &Key) {
let (name_ptr, name_size, _bytes) = str_ref_to_ptr(name);
let (key_ptr, key_size, _bytes2) = to_ptr(key);
unsafe { ext_ffi::add_uref(name_ptr, name_size, key_ptr, key_size) };
}
#[allow(clippy::ptr_arg)]
pub fn ret<T: ToBytes>(t: &T, extra_urefs: &Vec<Key>) -> ! {
let (ptr, size, _bytes) = to_ptr(t);
let (urefs_ptr, urefs_size, _bytes2) = to_ptr(extra_urefs);
unsafe {
ext_ffi::ret(ptr, size, urefs_ptr, urefs_size);
}
}
#[allow(clippy::ptr_arg)]
pub fn call_contract<T: FromBytes>(
c_ptr: ContractPointer,
args: &Vec<Vec<u8>>,
extra_urefs: &Vec<Key>,
) -> T {
let contract_key: Key = c_ptr.into();
let (key_ptr, key_size, _bytes1) = to_ptr(&contract_key);
let (args_ptr, args_size, _bytes2) = to_ptr(args);
let (urefs_ptr, urefs_size, _bytes3) = to_ptr(extra_urefs);
let res_size = unsafe {
ext_ffi::call_contract(
key_ptr, key_size, args_ptr, args_size, urefs_ptr, urefs_size,
)
};
let res_ptr = alloc_bytes(res_size);
let res_bytes = unsafe {
ext_ffi::get_call_result(res_ptr);
Vec::from_raw_parts(res_ptr, res_size, res_size)
};
deserialize(&res_bytes).unwrap()
}