2015-12-05 19:21:07 +01:00
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//! Bare rust wrapper around evmjit
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//!
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//! Requires latest version of Ethereum EVM JIT. https://github.com/debris/evmjit
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extern crate libc;
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use std::ptr;
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#[repr(C)]
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pub struct JitI256 {
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pub words: [u64; 4]
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}
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#[repr(C)]
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pub struct JitRuntimeData {
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pub gas: i64,
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pub gas_price: i64,
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pub call_data: *const libc::c_char,
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pub call_data_size: u64,
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pub address: JitI256,
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pub caller: JitI256,
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pub origin: JitI256,
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pub call_value: JitI256,
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pub coinbase: JitI256,
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pub difficulty: JitI256,
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pub gas_limit: JitI256,
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pub number: u64,
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pub timestamp: i64,
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pub code: *const libc::c_char,
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pub code_size: u64,
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pub code_hash: JitI256
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}
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2015-12-22 15:17:28 +01:00
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/// Component oriented safe handle to `JitRuntimeData`.
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pub struct RuntimeDataHandle {
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runtime_data: *mut JitRuntimeData
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}
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impl RuntimeDataHandle {
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/// Creates new handle.
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pub unsafe fn new() -> Self {
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RuntimeDataHandle {
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runtime_data: evmjit_create_runtime_data()
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}
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}
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/// Returns immutable reference to runtime data.
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pub unsafe fn runtime_data(&self) -> &JitRuntimeData {
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&*self.runtime_data
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}
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/// Returns mutable reference to runtime data.
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pub unsafe fn mut_runtime_data(&mut self) -> &mut JitRuntimeData {
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&mut *self.runtime_data
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}
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}
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impl Drop for RuntimeDataHandle {
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fn drop(&mut self) {
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unsafe { evmjit_destroy_runtime_data(self.runtime_data) }
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}
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}
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2015-12-05 19:21:07 +01:00
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#[repr(C)]
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2015-12-10 14:59:46 +01:00
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#[derive(Debug, Eq, PartialEq)]
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2015-12-05 19:21:07 +01:00
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pub enum JitReturnCode {
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Stop = 0,
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Return = 1,
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Suicide = 2,
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OutOfGas = -1,
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LLVMError = -101,
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UnexpectedError = -111
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}
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2015-12-22 15:17:28 +01:00
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/// JitContext struct declaration.
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2015-12-05 19:21:07 +01:00
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pub enum JitContext {}
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2015-12-22 15:17:28 +01:00
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pub struct ContextHandle {
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data_handle: RuntimeDataHandle,
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env: Env,
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context: *mut JitContext
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}
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impl ContextHandle {
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pub unsafe fn new(mut data_handle: RuntimeDataHandle, env: Env) -> Self {
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// TODO: context should take env
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let context = evmjit_create_context(data_handle.mut_runtime_data(), &mut 0);
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ContextHandle {
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data_handle: data_handle,
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env: env,
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context: context
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}
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}
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}
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/// Component oriented wrapper around jit env c interface.
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pub trait JitEnv {
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fn sload(&mut self);
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}
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/// C abi compatible wrapper for JitEnvTrait implementers.
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pub struct Env {
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env_impl: Option<Box<JitEnv>>
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}
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impl Env {
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pub fn new<T>(env_impl: T) -> Self where T: JitEnv + 'static {
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Env { env_impl: Some(Box::new(env_impl)) }
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}
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}
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impl JitEnv for Env {
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fn sload(&mut self) {
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if let Some(ref mut env) = self.env_impl {
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env.sload();
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}
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}
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}
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#[no_mangle]
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pub unsafe extern fn env_sload(env: *mut Env, _index: *const JitI256, _value: *const JitI256) {
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let env = &mut *env;
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env.sload();
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}
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#[no_mangle]
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pub extern fn env_sstore(_env: *mut Env, _index: *const JitI256, _value: *const JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_balance(_env: *mut Env, _address: *const JitI256, _value: *const JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_blockhash(_env: *mut Env, _number: *const JitI256, _hash: *const JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_create(_env: *mut Env,
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_io_gas: *const u64,
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_endowment: *const JitI256,
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_init_beg: *const u8,
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_init_size: *const u64,
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_address: *const JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_call(_env: *mut Env,
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_io_gas: *const u64,
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_call_gas: *const u64,
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_receive_address: *const JitI256,
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_value: *const JitI256,
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_in_beg: *const u8,
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_in_size: *const u64,
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_out_beg: *const u8,
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_out_size: *const u64,
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_code_address: JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_sha3(_begin: *const u8, _size: *const u64, _hash: *const JitI256) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_extcode(_env: *mut Env, _address: *const JitI256, _size: *const u64) {
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unimplemented!()
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}
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#[no_mangle]
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pub extern fn env_log(_env: *mut Env,
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_beg: *const u8,
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_size: *const u64,
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_topic1: *const JitI256,
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_topic2: *const JitI256,
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_topic3: *const JitI256,
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_topic4: *const JitI256) {
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unimplemented!()
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}
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2015-12-05 19:21:07 +01:00
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#[link(name="evmjit")]
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extern "C" {
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2015-12-10 14:59:46 +01:00
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pub fn evmjit_create_runtime_data() -> *mut JitRuntimeData;
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pub fn evmjit_destroy_runtime_data(data: *mut JitRuntimeData);
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2015-12-22 15:17:28 +01:00
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pub fn evmjit_create_context(data: *mut JitRuntimeData, env: *mut u8) -> *mut JitContext;
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2015-12-10 14:59:46 +01:00
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pub fn evmjit_destroy_context(context: *mut JitContext);
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pub fn evmjit_exec(context: *mut JitContext) -> JitReturnCode;
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2015-12-05 19:21:07 +01:00
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}
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#[test]
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fn it_works() {
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unsafe {
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2015-12-22 15:17:28 +01:00
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let mut env = 0u8;
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2015-12-10 14:59:46 +01:00
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let data = evmjit_create_runtime_data();
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2015-12-22 15:17:28 +01:00
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let context = evmjit_create_context(data, &mut env);
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2015-12-10 14:59:46 +01:00
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let code = evmjit_exec(context);
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assert_eq!(code, JitReturnCode::Stop);
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evmjit_destroy_runtime_data(data);
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evmjit_destroy_context(context);
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2015-12-05 19:21:07 +01:00
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}
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}
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