1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
// Copyright 2018 The Grin Developers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! Logging, as well as various low-level utilities that factor Rust
//! patterns that are frequent within the grin codebase.

#![deny(non_upper_case_globals)]
#![deny(non_camel_case_types)]
#![deny(non_snake_case)]
#![deny(unused_mut)]
#![warn(missing_docs)]

extern crate backtrace;
extern crate base64;
extern crate byteorder;
extern crate rand;
#[macro_use]
extern crate log;
extern crate log4rs;
#[macro_use]
extern crate lazy_static;

extern crate serde;
#[macro_use]
extern crate serde_derive;
extern crate walkdir;
extern crate zip as zip_rs;
// Re-export so only has to be included once
extern crate parking_lot;
pub use parking_lot::Mutex;
pub use parking_lot::RwLock;

// Re-export so only has to be included once
pub extern crate secp256k1zkp as secp;

// Logging related
pub mod logger;
pub use logger::{init_logger, init_test_logger};

// Static secp instance
pub mod secp_static;
pub use secp_static::static_secp_instance;

pub mod types;
pub use types::{LogLevel, LoggingConfig};

pub mod macros;

// read_exact and write_all impls
pub mod read_write;

// other utils
#[allow(unused_imports)]
use std::ops::Deref;
use std::sync::Arc;

mod hex;
pub use hex::*;

/// File util
pub mod file;
/// Compress and decompress zip bz2 archives
pub mod zip;

mod rate_counter;
pub use rate_counter::RateCounter;

/// Encapsulation of a RwLock<Option<T>> for one-time initialization.
/// This implementation will purposefully fail hard if not used
/// properly, for example if not initialized before being first used
/// (borrowed).
#[derive(Clone)]
pub struct OneTime<T> {
	/// The inner value.
	inner: Arc<RwLock<Option<T>>>,
}

impl<T> OneTime<T>
where
	T: Clone,
{
	/// Builds a new uninitialized OneTime.
	pub fn new() -> OneTime<T> {
		OneTime {
			inner: Arc::new(RwLock::new(None)),
		}
	}

	/// Initializes the OneTime, should only be called once after construction.
	/// Will panic (via assert) if called more than once.
	pub fn init(&self, value: T) {
		let mut inner = self.inner.write();
		assert!(inner.is_none());
		*inner = Some(value);
	}

	/// Borrows the OneTime, should only be called after initialization.
	/// Will panic (via expect) if called before initialization.
	pub fn borrow(&self) -> T {
		let inner = self.inner.read();
		inner
			.clone()
			.expect("Cannot borrow one_time before initialization.")
	}
}

/// Encode an utf8 string to a base64 string
pub fn to_base64(s: &str) -> String {
	base64::encode(s)
}