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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/intl/Region.h"
#include "mozilla/Assertions.h"
#include <algorithm>
#include "unicode/uregion.h"
#include "unicode/utypes.h"
namespace mozilla::intl {
/* static */
Result<Maybe<Region>, ICUError> Region::From(const RegionSubtag& aRegion) {
// Input is a valid region subtag.
auto regionSpan = aRegion.Span();
MOZ_ASSERT(IsStructurallyValidRegionTag(regionSpan));
// Zero-terminated region string.
char region[LanguageTagLimits::RegionLength + 1] = {};
std::copy_n(regionSpan.Elements(), LanguageTagLimits::RegionLength, region);
UErrorCode status = U_ZERO_ERROR;
const URegion* uregion = uregion_getRegionFromCode(region, &status);
// Returns "Illegal Argument" error for invalid region codes.
if (U_FAILURE(status)) {
if (status != U_ILLEGAL_ARGUMENT_ERROR) {
return Err(ToICUError(status));
}
return Maybe<Region>{};
}
return Some(Region{uregion, aRegion});
}
bool Region::IsRegular() const {
// Compares the region code in addition to the region type to reject
// deprecated regions. (`uregion_getRegionFromCode` implicitly canonicalizes
// to modern replacements.)
return uregion_getType(mURegion) == URGN_TERRITORY &&
mozilla::MakeStringSpan(uregion_getRegionCode(mURegion)) ==
mRegion.Span();
}
} // namespace mozilla::intl