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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
use errors;
use io;
// Encountered invalid DER encoded data.
export type invalid = !void;
// Unexpected data format.
export type badformat = !void;
// Premature EOF.
export type truncated = !void;
// Data does not fit into the encoder buffer.
export type overflow = !void;
type asn1error = !(invalid | badformat | overflow | truncated);
// Any error within the asn1 module.
export type error = !(...io::error | ...asn1error);
// Converts an [[error]] into a user-friendly string.
export fn strerror(e: error) str = {
match (e) {
case invalid =>
return "Encountered invalid DER encoded data";
case badformat =>
return "Unexpected data format";
case truncated =>
return "Premature EOF";
case overflow =>
return "Data does not fit into the encoder buffer";
case let e: io::error =>
return io::strerror(e);
};
};
fn wrap_err(e: error) io::error = {
match (e) {
case let e: io::error =>
return e;
case let e: asn1error =>
static assert(size(asn1error) <= size(errors::opaque_data));
let w = errors::opaque_ { strerror = &wrap_strerror, ... };
let ptr = &w.data: *error;
*ptr = e;
return w;
};
};
fn wrap_strerror(err: *errors::opaque_data) const str = {
let e = err: *error;
return strerror(*e);
};
// Unwraps an [[io::error]] returned by ASN.1 readers as an [[error]].
export fn unwrap_err(e: io::error) error = {
match (e) {
case let e: errors::opaque_ =>
let ptr = &e.data: *error;
return *ptr;
case let e: io::error =>
return e;
};
};
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