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// Copyright © 2017 Mozilla Foundation
//
// This program is made available under an ISC-style license. See the
// accompanying file LICENSE for details.
use ffi;
use std::ffi::CStr;
#[macro_export]
macro_rules! error_result {
($t:expr, $err:expr) => {
if $err >= 0 {
Ok($t)
} else {
Err(ErrorCode::from_error_result($err))
}
};
}
#[derive(Debug, PartialEq)]
pub struct ErrorCode {
err: ffi::pa_error_code_t,
}
impl ErrorCode {
pub fn from_error_result(err: i32) -> Self {
debug_assert!(err < 0);
ErrorCode {
err: (-err) as ffi::pa_error_code_t,
}
}
pub fn from_error_code(err: ffi::pa_error_code_t) -> Self {
debug_assert!(err > 0);
ErrorCode { err: err }
}
fn desc(&self) -> &'static str {
let cstr = unsafe { CStr::from_ptr(ffi::pa_strerror(self.err)) };
cstr.to_str().unwrap()
}
}
impl ::std::error::Error for ErrorCode {
fn description(&self) -> &str {
self.desc()
}
}
impl ::std::fmt::Display for ErrorCode {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, "{:?}: {}", self, self.desc())
}
}