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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
use fmt;
use fs;
use io;
use time::chrono;
// All possible errors returned from this module.
export type error = !(
invalid
| insufficient
| zfunresolved
| parsefail
| invalidtzif
| tzdberror
| chrono::tscmismatch
);
// Converts an [[error]] into a human-friendly string. The result may be
// statically allocated.
export fn strerror(err: error) const str = {
static let buf: [92]u8 = [0...];
match (err) {
case insufficient =>
return "Insufficient date information";
case invalid =>
return "Invalid date information";
case let e: zfunresolved =>
switch (e) {
case zferror::GAP =>
return "Failed to resolve zone-offset in a timezone transition overlap";
case zferror::LAP =>
return "Failed to resolve zone-offset in a timezone transition gap";
};
case let pf: parsefail =>
const (bi, rn) = pf;
def FMTMSG = "Date parsing failure for layout rune '{}' at byteindex {}";
static let buf: [len(FMTMSG) + 3]u8 = [0...];
return fmt::bsprintf(buf, FMTMSG, rn, bi)!;
case invalidtzif =>
return "Invalid TZif data";
case let err: tzdberror =>
static let buf: [1024]u8 = [0...];
match (err) {
case let err: fs::error =>
return fmt::bsprintf(buf,
"Timezone database error: {}",
fs::strerror(err),
)!;
case let err: io::error =>
return fmt::bsprintf(buf,
"Timezone database error: {}",
io::strerror(err),
)!;
case invalidtzif =>
return "Timezone database error: Invalid TZif data";
};
case let err: chrono::tscmismatch =>
return chrono::strerror(err);
};
};
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