437 lines
13 KiB
C++
437 lines
13 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
*
|
|
* Copyright (C) 1997-2016, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*
|
|
*******************************************************************************
|
|
* file name: loclikely.cpp
|
|
* encoding: UTF-8
|
|
* tab size: 8 (not used)
|
|
* indentation:4
|
|
*
|
|
* created on: 2010feb25
|
|
* created by: Markus W. Scherer
|
|
*
|
|
* Code for likely and minimized locale subtags, separated out from other .cpp files
|
|
* that then do not depend on resource bundle code and likely-subtags data.
|
|
*/
|
|
|
|
#include <utility>
|
|
|
|
#include "unicode/bytestream.h"
|
|
#include "unicode/utypes.h"
|
|
#include "unicode/locid.h"
|
|
#include "unicode/putil.h"
|
|
#include "unicode/uchar.h"
|
|
#include "unicode/uloc.h"
|
|
#include "unicode/ures.h"
|
|
#include "unicode/uscript.h"
|
|
#include "bytesinkutil.h"
|
|
#include "charstr.h"
|
|
#include "cmemory.h"
|
|
#include "cstring.h"
|
|
#include "loclikelysubtags.h"
|
|
#include "ulocimp.h"
|
|
|
|
namespace {
|
|
|
|
/**
|
|
* Create a tag string from the supplied parameters. The lang, script and region
|
|
* parameters may be nullptr pointers. If they are, their corresponding length parameters
|
|
* must be less than or equal to 0.
|
|
*
|
|
* If an illegal argument is provided, the function returns the error
|
|
* U_ILLEGAL_ARGUMENT_ERROR.
|
|
*
|
|
* @param lang The language tag to use.
|
|
* @param langLength The length of the language tag.
|
|
* @param script The script tag to use.
|
|
* @param scriptLength The length of the script tag.
|
|
* @param region The region tag to use.
|
|
* @param regionLength The length of the region tag.
|
|
* @param variant The region tag to use.
|
|
* @param variantLength The length of the region tag.
|
|
* @param trailing Any trailing data to append to the new tag.
|
|
* @param trailingLength The length of the trailing data.
|
|
* @param sink The output sink receiving the tag string.
|
|
* @param err A pointer to a UErrorCode for error reporting.
|
|
**/
|
|
void U_CALLCONV
|
|
createTagStringWithAlternates(
|
|
const char* lang,
|
|
int32_t langLength,
|
|
const char* script,
|
|
int32_t scriptLength,
|
|
const char* region,
|
|
int32_t regionLength,
|
|
const char* variant,
|
|
int32_t variantLength,
|
|
const char* trailing,
|
|
int32_t trailingLength,
|
|
icu::ByteSink& sink,
|
|
UErrorCode& err) {
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
|
|
if (langLength >= ULOC_LANG_CAPACITY ||
|
|
scriptLength >= ULOC_SCRIPT_CAPACITY ||
|
|
regionLength >= ULOC_COUNTRY_CAPACITY) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
if (langLength > 0) {
|
|
sink.Append(lang, langLength);
|
|
}
|
|
|
|
if (scriptLength > 0) {
|
|
sink.Append("_", 1);
|
|
sink.Append(script, scriptLength);
|
|
}
|
|
|
|
if (regionLength > 0) {
|
|
sink.Append("_", 1);
|
|
sink.Append(region, regionLength);
|
|
}
|
|
|
|
if (variantLength > 0) {
|
|
if (regionLength == 0) {
|
|
/* extra separator is required */
|
|
sink.Append("_", 1);
|
|
}
|
|
sink.Append("_", 1);
|
|
sink.Append(variant, variantLength);
|
|
}
|
|
|
|
if (trailingLength > 0) {
|
|
/*
|
|
* Copy the trailing data into the supplied buffer.
|
|
*/
|
|
sink.Append(trailing, trailingLength);
|
|
}
|
|
}
|
|
|
|
bool CHECK_TRAILING_VARIANT_SIZE(const char* variant, int32_t variantLength) {
|
|
int32_t count = 0;
|
|
for (int32_t i = 0; i < variantLength; i++) {
|
|
if (_isIDSeparator(variant[i])) {
|
|
count = 0;
|
|
} else if (count == 8) {
|
|
return false;
|
|
} else {
|
|
count++;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
_uloc_addLikelySubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode& err) {
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
|
|
if (localeID == nullptr) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
icu::CharString lang;
|
|
icu::CharString script;
|
|
icu::CharString region;
|
|
icu::CharString variant;
|
|
const char* trailing = nullptr;
|
|
ulocimp_getSubtags(localeID, &lang, &script, ®ion, &variant, &trailing, err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
|
|
if (!CHECK_TRAILING_VARIANT_SIZE(variant.data(), variant.length())) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
if (lang.length() == 4) {
|
|
if (script.isEmpty()) {
|
|
script = std::move(lang);
|
|
lang.clear();
|
|
} else {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
} else if (lang.length() > 8) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
int32_t trailingLength = (int32_t)uprv_strlen(trailing);
|
|
|
|
const icu::LikelySubtags* likelySubtags = icu::LikelySubtags::getSingleton(err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
// We need to keep l on the stack because lsr may point into internal
|
|
// memory of l.
|
|
icu::Locale l = icu::Locale::createFromName(localeID);
|
|
if (l.isBogus()) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
icu::LSR lsr = likelySubtags->makeMaximizedLsrFrom(l, true, err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
const char* language = lsr.language;
|
|
if (uprv_strcmp(language, "und") == 0) {
|
|
language = "";
|
|
}
|
|
createTagStringWithAlternates(
|
|
language,
|
|
(int32_t)uprv_strlen(language),
|
|
lsr.script,
|
|
(int32_t)uprv_strlen(lsr.script),
|
|
lsr.region,
|
|
(int32_t)uprv_strlen(lsr.region),
|
|
variant.data(),
|
|
variant.length(),
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
}
|
|
|
|
void
|
|
_uloc_minimizeSubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
bool favorScript,
|
|
UErrorCode& err) {
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
|
|
if (localeID == nullptr) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
icu::CharString lang;
|
|
icu::CharString script;
|
|
icu::CharString region;
|
|
icu::CharString variant;
|
|
const char* trailing = nullptr;
|
|
ulocimp_getSubtags(localeID, &lang, &script, ®ion, &variant, &trailing, err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
|
|
if (!CHECK_TRAILING_VARIANT_SIZE(variant.data(), variant.length())) {
|
|
err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
int32_t trailingLength = (int32_t)uprv_strlen(trailing);
|
|
|
|
const icu::LikelySubtags* likelySubtags = icu::LikelySubtags::getSingleton(err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
icu::LSR lsr = likelySubtags->minimizeSubtags(
|
|
lang.toStringPiece(),
|
|
script.toStringPiece(),
|
|
region.toStringPiece(),
|
|
favorScript,
|
|
err);
|
|
if (U_FAILURE(err)) {
|
|
return;
|
|
}
|
|
const char* language = lsr.language;
|
|
if (uprv_strcmp(language, "und") == 0) {
|
|
language = "";
|
|
}
|
|
createTagStringWithAlternates(
|
|
language,
|
|
(int32_t)uprv_strlen(language),
|
|
lsr.script,
|
|
(int32_t)uprv_strlen(lsr.script),
|
|
lsr.region,
|
|
(int32_t)uprv_strlen(lsr.region),
|
|
variant.data(),
|
|
variant.length(),
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
uloc_addLikelySubtags(const char* localeID,
|
|
char* maximizedLocaleID,
|
|
int32_t maximizedLocaleIDCapacity,
|
|
UErrorCode* status) {
|
|
return icu::ByteSinkUtil::viaByteSinkToTerminatedChars(
|
|
maximizedLocaleID, maximizedLocaleIDCapacity,
|
|
[&](icu::ByteSink& sink, UErrorCode& status) {
|
|
ulocimp_addLikelySubtags(localeID, sink, status);
|
|
},
|
|
*status);
|
|
}
|
|
|
|
U_EXPORT icu::CharString
|
|
ulocimp_addLikelySubtags(const char* localeID,
|
|
UErrorCode& status) {
|
|
return icu::ByteSinkUtil::viaByteSinkToCharString(
|
|
[&](icu::ByteSink& sink, UErrorCode& status) {
|
|
ulocimp_addLikelySubtags(localeID, sink, status);
|
|
},
|
|
status);
|
|
}
|
|
|
|
U_EXPORT void
|
|
ulocimp_addLikelySubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) { return; }
|
|
icu::CharString localeBuffer = ulocimp_canonicalize(localeID, status);
|
|
_uloc_addLikelySubtags(localeBuffer.data(), sink, status);
|
|
}
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
uloc_minimizeSubtags(const char* localeID,
|
|
char* minimizedLocaleID,
|
|
int32_t minimizedLocaleIDCapacity,
|
|
UErrorCode* status) {
|
|
return icu::ByteSinkUtil::viaByteSinkToTerminatedChars(
|
|
minimizedLocaleID, minimizedLocaleIDCapacity,
|
|
[&](icu::ByteSink& sink, UErrorCode& status) {
|
|
ulocimp_minimizeSubtags(localeID, sink, false, status);
|
|
},
|
|
*status);
|
|
}
|
|
|
|
U_EXPORT icu::CharString
|
|
ulocimp_minimizeSubtags(const char* localeID,
|
|
bool favorScript,
|
|
UErrorCode& status) {
|
|
return icu::ByteSinkUtil::viaByteSinkToCharString(
|
|
[&](icu::ByteSink& sink, UErrorCode& status) {
|
|
ulocimp_minimizeSubtags(localeID, sink, favorScript, status);
|
|
},
|
|
status);
|
|
}
|
|
|
|
U_EXPORT void
|
|
ulocimp_minimizeSubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
bool favorScript,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) { return; }
|
|
icu::CharString localeBuffer = ulocimp_canonicalize(localeID, status);
|
|
_uloc_minimizeSubtags(localeBuffer.data(), sink, favorScript, status);
|
|
}
|
|
|
|
// Pairs of (language subtag, + or -) for finding out fast if common languages
|
|
// are LTR (minus) or RTL (plus).
|
|
static const char LANG_DIR_STRING[] =
|
|
"root-en-es-pt-zh-ja-ko-de-fr-it-ar+he+fa+ru-nl-pl-th-tr-";
|
|
|
|
// Implemented here because this calls ulocimp_addLikelySubtags().
|
|
U_CAPI UBool U_EXPORT2
|
|
uloc_isRightToLeft(const char *locale) {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
icu::CharString lang;
|
|
icu::CharString script;
|
|
ulocimp_getSubtags(locale, &lang, &script, nullptr, nullptr, nullptr, errorCode);
|
|
if (U_FAILURE(errorCode) || script.isEmpty()) {
|
|
// Fastpath: We know the likely scripts and their writing direction
|
|
// for some common languages.
|
|
if (!lang.isEmpty()) {
|
|
const char* langPtr = uprv_strstr(LANG_DIR_STRING, lang.data());
|
|
if (langPtr != nullptr) {
|
|
switch (langPtr[lang.length()]) {
|
|
case '-': return false;
|
|
case '+': return true;
|
|
default: break; // partial match of a longer code
|
|
}
|
|
}
|
|
}
|
|
// Otherwise, find the likely script.
|
|
errorCode = U_ZERO_ERROR;
|
|
icu::CharString likely = ulocimp_addLikelySubtags(locale, errorCode);
|
|
if (U_FAILURE(errorCode)) {
|
|
return false;
|
|
}
|
|
ulocimp_getSubtags(likely.data(), nullptr, &script, nullptr, nullptr, nullptr, errorCode);
|
|
if (U_FAILURE(errorCode) || script.isEmpty()) {
|
|
return false;
|
|
}
|
|
}
|
|
UScriptCode scriptCode = (UScriptCode)u_getPropertyValueEnum(UCHAR_SCRIPT, script.data());
|
|
return uscript_isRightToLeft(scriptCode);
|
|
}
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
UBool
|
|
Locale::isRightToLeft() const {
|
|
return uloc_isRightToLeft(getBaseName());
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
namespace {
|
|
icu::CharString
|
|
GetRegionFromKey(const char* localeID, const char* key, UErrorCode& status) {
|
|
icu::CharString result;
|
|
|
|
// First check for keyword value
|
|
icu::CharString kw = ulocimp_getKeywordValue(localeID, key, status);
|
|
int32_t len = kw.length();
|
|
if (U_SUCCESS(status) && len >= 3 && len <= 7) {
|
|
// chop off the subdivision code (which will generally be "zzzz" anyway)
|
|
const char* const data = kw.data();
|
|
if (uprv_isASCIILetter(data[0])) {
|
|
result.append(uprv_toupper(data[0]), status);
|
|
result.append(uprv_toupper(data[1]), status);
|
|
} else {
|
|
// assume three-digit region code
|
|
result.append(data, 3, status);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
} // namespace
|
|
|
|
U_EXPORT icu::CharString
|
|
ulocimp_getRegionForSupplementalData(const char *localeID, bool inferRegion,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) {
|
|
return {};
|
|
}
|
|
icu::CharString rgBuf = GetRegionFromKey(localeID, "rg", status);
|
|
if (U_SUCCESS(status) && rgBuf.isEmpty()) {
|
|
// No valid rg keyword value, try for unicode_region_subtag
|
|
rgBuf = ulocimp_getRegion(localeID, status);
|
|
if (U_SUCCESS(status) && rgBuf.isEmpty() && inferRegion) {
|
|
// Second check for sd keyword value
|
|
rgBuf = GetRegionFromKey(localeID, "sd", status);
|
|
if (U_SUCCESS(status) && rgBuf.isEmpty()) {
|
|
// no unicode_region_subtag but inferRegion true, try likely subtags
|
|
UErrorCode rgStatus = U_ZERO_ERROR;
|
|
icu::CharString locBuf = ulocimp_addLikelySubtags(localeID, rgStatus);
|
|
if (U_SUCCESS(rgStatus)) {
|
|
rgBuf = ulocimp_getRegion(locBuf.data(), status);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return rgBuf;
|
|
}
|