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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/intl/PluralRules.h"
#include "mozilla/intl/ICU4CGlue.h"
#include "mozilla/intl/NumberFormat.h"
#include "mozilla/intl/NumberRangeFormat.h"
#include "mozilla/Utf8.h"
#include "mozilla/PodOperations.h"
#include "mozilla/Span.h"
#include "ScopedICUObject.h"
#include "unicode/unum.h"
#include "unicode/upluralrules.h"
#include "unicode/ustring.h"
namespace mozilla::intl {
PluralRules::PluralRules(UPluralRules*& aPluralRules,
UniquePtr<NumberFormat>&& aNumberFormat,
UniquePtr<NumberRangeFormat>&& aNumberRangeFormat)
: mPluralRules(aPluralRules),
mNumberFormat(std::move(aNumberFormat)),
mNumberRangeFormat(std::move(aNumberRangeFormat)) {
MOZ_ASSERT(aPluralRules);
aPluralRules = nullptr;
}
Result<UniquePtr<PluralRules>, ICUError> PluralRules::TryCreate(
const std::string_view aLocale, const PluralRulesOptions& aOptions) {
auto numberFormat =
NumberFormat::TryCreate(aLocale, aOptions.ToNumberFormatOptions());
if (numberFormat.isErr()) {
return Err(numberFormat.unwrapErr());
}
auto numberRangeFormat = NumberRangeFormat::TryCreate(
aLocale, aOptions.ToNumberRangeFormatOptions());
if (numberRangeFormat.isErr()) {
return Err(numberRangeFormat.unwrapErr());
}
UErrorCode status = U_ZERO_ERROR;
auto pluralType = aOptions.mPluralType == PluralRules::Type::Cardinal
? UPLURAL_TYPE_CARDINAL
: UPLURAL_TYPE_ORDINAL;
UPluralRules* pluralRules = uplrules_openForType(
AssertNullTerminatedString(aLocale), pluralType, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
return UniquePtr<PluralRules>(new PluralRules(
pluralRules, numberFormat.unwrap(), numberRangeFormat.unwrap()));
}
Result<PluralRules::Keyword, ICUError> PluralRules::Select(
const double aNumber) const {
char16_t keyword[MAX_KEYWORD_LENGTH];
auto lengthResult = mNumberFormat->selectFormatted(
aNumber, keyword, MAX_KEYWORD_LENGTH, mPluralRules);
if (lengthResult.isErr()) {
return Err(lengthResult.unwrapErr());
}
return KeywordFromUtf16(Span(keyword, lengthResult.unwrap()));
}
Result<PluralRules::Keyword, ICUError> PluralRules::SelectRange(
double aStart, double aEnd) const {
char16_t keyword[MAX_KEYWORD_LENGTH];
auto lengthResult = mNumberRangeFormat->selectForRange(
aStart, aEnd, keyword, MAX_KEYWORD_LENGTH, mPluralRules);
if (lengthResult.isErr()) {
return Err(lengthResult.unwrapErr());
}
return KeywordFromUtf16(Span(keyword, lengthResult.unwrap()));
}
Result<EnumSet<PluralRules::Keyword>, ICUError> PluralRules::Categories()
const {
UErrorCode status = U_ZERO_ERROR;
UEnumeration* enumeration = uplrules_getKeywords(mPluralRules, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
ScopedICUObject<UEnumeration, uenum_close> closeEnum(enumeration);
EnumSet<PluralRules::Keyword> set;
while (true) {
int32_t keywordLength;
const char* keyword = uenum_next(enumeration, &keywordLength, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
if (!keyword) {
break;
}
set += KeywordFromAscii(Span(keyword, keywordLength));
}
return set;
}
PluralRules::Keyword PluralRules::KeywordFromUtf16(
Span<const char16_t> aKeyword) {
static constexpr auto kZero = MakeStringSpan(u"zero");
static constexpr auto kOne = MakeStringSpan(u"one");
static constexpr auto kTwo = MakeStringSpan(u"two");
static constexpr auto kFew = MakeStringSpan(u"few");
static constexpr auto kMany = MakeStringSpan(u"many");
if (aKeyword == kZero) {
return PluralRules::Keyword::Zero;
}
if (aKeyword == kOne) {
return PluralRules::Keyword::One;
}
if (aKeyword == kTwo) {
return PluralRules::Keyword::Two;
}
if (aKeyword == kFew) {
return PluralRules::Keyword::Few;
}
if (aKeyword == kMany) {
return PluralRules::Keyword::Many;
}
MOZ_ASSERT(aKeyword == MakeStringSpan(u"other"));
return PluralRules::Keyword::Other;
}
PluralRules::Keyword PluralRules::KeywordFromAscii(Span<const char> aKeyword) {
static constexpr auto kZero = MakeStringSpan("zero");
static constexpr auto kOne = MakeStringSpan("one");
static constexpr auto kTwo = MakeStringSpan("two");
static constexpr auto kFew = MakeStringSpan("few");
static constexpr auto kMany = MakeStringSpan("many");
if (aKeyword == kZero) {
return PluralRules::Keyword::Zero;
}
if (aKeyword == kOne) {
return PluralRules::Keyword::One;
}
if (aKeyword == kTwo) {
return PluralRules::Keyword::Two;
}
if (aKeyword == kFew) {
return PluralRules::Keyword::Few;
}
if (aKeyword == kMany) {
return PluralRules::Keyword::Many;
}
MOZ_ASSERT(aKeyword == MakeStringSpan("other"));
return PluralRules::Keyword::Other;
}
PluralRules::~PluralRules() {
if (mPluralRules) {
uplrules_close(mPluralRules);
mPluralRules = nullptr;
}
}
} // namespace mozilla::intl
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