60 lines
1.9 KiB
Rust
60 lines
1.9 KiB
Rust
// Copyright 2015 Brian Smith.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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use crate::{c, error};
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/// An `int` returned from a foreign function containing **1** if the function
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/// was successful or **0** if an error occurred. This is the convention used by
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/// C code in `ring`.
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#[derive(Clone, Copy, Debug)]
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#[must_use]
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#[repr(transparent)]
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pub struct Result(c::int);
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impl From<Result> for core::result::Result<(), error::Unspecified> {
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fn from(ret: Result) -> Self {
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match ret.0 {
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1 => Ok(()),
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c => {
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debug_assert_eq!(c, 0, "`bssl::Result` value must be 0 or 1");
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Err(error::Unspecified)
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}
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}
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}
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}
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#[cfg(test)]
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mod tests {
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mod result {
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use crate::{bssl, c};
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use core::mem;
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#[test]
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fn size_and_alignment() {
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type Underlying = c::int;
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assert_eq!(mem::size_of::<bssl::Result>(), mem::size_of::<Underlying>());
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assert_eq!(
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mem::align_of::<bssl::Result>(),
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mem::align_of::<Underlying>()
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);
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}
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#[test]
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fn semantics() {
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assert!(Result::from(bssl::Result(0)).is_err());
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assert!(Result::from(bssl::Result(1)).is_ok());
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}
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}
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}
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