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#[cfg(feature="rustc-serialize")]
#[cfg(not(feature="serde_serialization"))]
pub use rustc_serialize::{Error, load, save};
#[cfg(feature="serde_serialization")]
#[cfg(not(feature="rustc_serialization"))]
pub use serde::{Error, load, save};
#[cfg(feature="serde_serialization")]
mod serde {
extern crate serde;
extern crate serde_json;
use std;
#[derive(Debug)]
pub enum Error {
IO(std::io::Error),
Utf8(std::str::Utf8Error),
Json(serde_json::error::Error),
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
match *self {
Error::IO(ref err) => std::fmt::Display::fmt(err, f),
Error::Utf8(ref err) => std::fmt::Display::fmt(err, f),
Error::Json(ref err) => std::fmt::Display::fmt(err, f),
}
}
}
impl std::error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::IO(ref err) => std::error::Error::description(err),
Error::Utf8(ref err) => std::error::Error::description(err),
Error::Json(ref err) => std::error::Error::description(err),
}
}
}
impl From<std::io::Error> for Error {
fn from(err: std::io::Error) -> Self {
Error::IO(err)
}
}
impl From<std::str::Utf8Error> for Error {
fn from(err: std::str::Utf8Error) -> Self {
Error::Utf8(err)
}
}
impl From<serde_json::error::Error> for Error {
fn from(err: serde_json::error::Error) -> Self {
Error::Json(err)
}
}
pub fn load<P, T>(path: P) -> Result<T, Error>
where P: AsRef<std::path::Path>,
T: serde::Deserialize,
{
let path = path.as_ref();
let mut file = match std::fs::File::open(&path) {
Ok(file) => file,
Err(err) => match err.kind() {
std::io::ErrorKind::NotFound =>
try!(std::fs::File::open(&path.with_extension("json"))),
_ => return Err(err.into()),
},
};
let mut contents = Vec::new();
try!(std::io::Read::read_to_end(&mut file, &mut contents));
let json_str = try!(std::str::from_utf8(&contents[..]));
let t: T = try!(serde_json::from_str(&json_str));
Ok(t)
}
pub fn save<P, T>(path: P, t: &T) -> Result<(), Error>
where P: AsRef<std::path::Path>,
T: serde::Serialize,
{
let path = path.as_ref();
let json_string = try!(serde_json::to_string(&t));
let mut file = try!(std::fs::File::create(&path.with_extension("json")));
try!(std::io::Write::write_all(&mut file, json_string.as_bytes()));
Ok(())
}
}
#[cfg(not(feature="serde_serialization"))]
mod rustc_serialize {
extern crate rustc_serialize;
use self::rustc_serialize::{json, Decodable, Encodable};
use std;
use std::fs::File;
use std::io;
use std::path::Path;
#[derive(Debug)]
pub enum Error {
IO(std::io::Error),
JsonParserError(json::ParserError),
JsonDecoderError(json::DecoderError),
JsonEncoderError(json::EncoderError),
}
impl From<std::io::Error> for Error {
fn from(err: std::io::Error) -> Self {
Error::IO(err)
}
}
impl From<json::ParserError> for Error {
fn from(err: json::ParserError) -> Self {
Error::JsonParserError(err)
}
}
impl From<json::DecoderError> for Error {
fn from(err: json::DecoderError) -> Self {
Error::JsonDecoderError(err)
}
}
impl From<json::EncoderError> for Error {
fn from(err: json::EncoderError) -> Self {
Error::JsonEncoderError(err)
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
writeln!(f, "{:?}", *self)
}
}
impl ::std::error::Error for Error {
fn description(&self) -> &str {
use std::error::Error as StdError;
match *self {
Error::IO(ref err) => err.description(),
Error::JsonParserError(ref err) => err.description(),
Error::JsonDecoderError(ref err) => err.description(),
Error::JsonEncoderError(ref err) => err.description(),
}
}
}
#[deprecated(since="0.3.0", note="rustc-serialize has been deprecated - use serde instead")]
pub fn load<T: Decodable>(path: &Path) -> Result<T, Error> {
let mut file = match std::fs::File::open(&path) {
Ok(file) => file,
Err(err) => match err.kind() {
std::io::ErrorKind::NotFound =>
try!(std::fs::File::open(&path.with_extension("json"))),
_ => return Err(err.into()),
},
};
let mut contents = Vec::new();
try!(io::Read::read_to_end(&mut file, &mut contents).map_err(|err| Error::IO(err)));
let json_object = try!(json::Json::from_str(std::str::from_utf8(&contents[..]).unwrap())
.map_err(|err| Error::JsonParserError(err)));
let mut decoder = json::Decoder::new(json_object);
T::decode(&mut decoder).map_err(|err| Error::JsonDecoderError(err))
}
#[deprecated(since="0.3.0", note="rustc-serialize has been deprecated - use serde instead")]
pub fn save<T: Encodable>(path: &Path, t: &T) -> Result<(), Error> {
let json_string = try!(json::encode(&t).map_err(|err| Error::JsonEncoderError(err)));
let mut file = try!(File::create(&path.with_extension("json")).map_err(|err| Error::IO(err)));
io::Write::write_all(&mut file, json_string.as_bytes()).map_err(|err| Error::IO(err))
}
}