1416 lines
40 KiB
C++
1416 lines
40 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 1997-2016, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: loclikely.cpp
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2010feb25
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* created by: Markus W. Scherer
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*
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* Code for likely and minimized locale subtags, separated out from other .cpp files
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* that then do not depend on resource bundle code and likely-subtags data.
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*/
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#include "unicode/bytestream.h"
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#include "unicode/utypes.h"
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#include "unicode/locid.h"
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#include "unicode/putil.h"
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#include "unicode/uchar.h"
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#include "unicode/uloc.h"
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#include "unicode/ures.h"
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#include "unicode/uscript.h"
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#include "bytesinkutil.h"
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#include "charstr.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "ulocimp.h"
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#include "ustr_imp.h"
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/**
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* These are the canonical strings for unknown languages, scripts and regions.
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**/
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static const char* const unknownLanguage = "und";
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static const char* const unknownScript = "Zzzz";
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static const char* const unknownRegion = "ZZ";
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/**
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* This function looks for the localeID in the likelySubtags resource.
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*
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* @param localeID The tag to find.
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* @param buffer A buffer to hold the matching entry
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* @param bufferLength The length of the output buffer
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* @return A pointer to "buffer" if found, or a null pointer if not.
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*/
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static const char* U_CALLCONV
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findLikelySubtags(const char* localeID,
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char* buffer,
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int32_t bufferLength,
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UErrorCode* err) {
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const char* result = NULL;
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if (!U_FAILURE(*err)) {
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int32_t resLen = 0;
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const UChar* s = NULL;
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UErrorCode tmpErr = U_ZERO_ERROR;
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icu::LocalUResourceBundlePointer subtags(ures_openDirect(NULL, "likelySubtags", &tmpErr));
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if (U_SUCCESS(tmpErr)) {
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icu::CharString und;
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if (localeID != NULL) {
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if (*localeID == '\0') {
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localeID = unknownLanguage;
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} else if (*localeID == '_') {
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und.append(unknownLanguage, *err);
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und.append(localeID, *err);
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if (U_FAILURE(*err)) {
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return NULL;
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}
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localeID = und.data();
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}
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}
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s = ures_getStringByKey(subtags.getAlias(), localeID, &resLen, &tmpErr);
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if (U_FAILURE(tmpErr)) {
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/*
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* If a resource is missing, it's not really an error, it's
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* just that we don't have any data for that particular locale ID.
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*/
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if (tmpErr != U_MISSING_RESOURCE_ERROR) {
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*err = tmpErr;
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}
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}
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else if (resLen >= bufferLength) {
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/* The buffer should never overflow. */
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*err = U_INTERNAL_PROGRAM_ERROR;
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}
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else {
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u_UCharsToChars(s, buffer, resLen + 1);
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if (resLen >= 3 &&
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uprv_strnicmp(buffer, unknownLanguage, 3) == 0 &&
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(resLen == 3 || buffer[3] == '_')) {
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uprv_memmove(buffer, buffer + 3, resLen - 3 + 1);
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}
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result = buffer;
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}
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} else {
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*err = tmpErr;
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}
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}
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return result;
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}
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/**
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* Append a tag to a buffer, adding the separator if necessary. The buffer
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* must be large enough to contain the resulting tag plus any separator
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* necessary. The tag must not be a zero-length string.
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*
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* @param tag The tag to add.
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* @param tagLength The length of the tag.
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* @param buffer The output buffer.
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* @param bufferLength The length of the output buffer. This is an input/output parameter.
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**/
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static void U_CALLCONV
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appendTag(
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const char* tag,
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int32_t tagLength,
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char* buffer,
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int32_t* bufferLength,
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UBool withSeparator) {
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if (withSeparator) {
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buffer[*bufferLength] = '_';
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++(*bufferLength);
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}
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uprv_memmove(
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&buffer[*bufferLength],
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tag,
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tagLength);
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*bufferLength += tagLength;
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}
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/**
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* Create a tag string from the supplied parameters. The lang, script and region
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* parameters may be NULL pointers. If they are, their corresponding length parameters
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* must be less than or equal to 0.
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*
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* If any of the language, script or region parameters are empty, and the alternateTags
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* parameter is not NULL, it will be parsed for potential language, script and region tags
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* to be used when constructing the new tag. If the alternateTags parameter is NULL, or
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* it contains no language tag, the default tag for the unknown language is used.
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*
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* If the length of the new string exceeds the capacity of the output buffer,
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* the function copies as many bytes to the output buffer as it can, and returns
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* the error U_BUFFER_OVERFLOW_ERROR.
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*
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* If an illegal argument is provided, the function returns the error
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* U_ILLEGAL_ARGUMENT_ERROR.
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*
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* Note that this function can return the warning U_STRING_NOT_TERMINATED_WARNING if
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* the tag string fits in the output buffer, but the null terminator doesn't.
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*
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* @param lang The language tag to use.
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* @param langLength The length of the language tag.
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* @param script The script tag to use.
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* @param scriptLength The length of the script tag.
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* @param region The region tag to use.
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* @param regionLength The length of the region tag.
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* @param trailing Any trailing data to append to the new tag.
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* @param trailingLength The length of the trailing data.
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* @param alternateTags A string containing any alternate tags.
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* @param sink The output sink receiving the tag string.
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* @param err A pointer to a UErrorCode for error reporting.
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**/
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static void U_CALLCONV
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createTagStringWithAlternates(
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const char* lang,
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int32_t langLength,
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const char* script,
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int32_t scriptLength,
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const char* region,
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int32_t regionLength,
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const char* trailing,
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int32_t trailingLength,
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const char* alternateTags,
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icu::ByteSink& sink,
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UErrorCode* err) {
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if (U_FAILURE(*err)) {
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goto error;
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}
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else if (langLength >= ULOC_LANG_CAPACITY ||
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scriptLength >= ULOC_SCRIPT_CAPACITY ||
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regionLength >= ULOC_COUNTRY_CAPACITY) {
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goto error;
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}
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else {
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/**
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* ULOC_FULLNAME_CAPACITY will provide enough capacity
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* that we can build a string that contains the language,
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* script and region code without worrying about overrunning
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* the user-supplied buffer.
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**/
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char tagBuffer[ULOC_FULLNAME_CAPACITY];
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int32_t tagLength = 0;
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UBool regionAppended = false;
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if (langLength > 0) {
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appendTag(
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lang,
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langLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/false);
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}
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else if (alternateTags == NULL) {
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/*
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* Use the empty string for an unknown language, if
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* we found no language.
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*/
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}
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else {
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/*
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* Parse the alternateTags string for the language.
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*/
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char alternateLang[ULOC_LANG_CAPACITY];
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int32_t alternateLangLength = sizeof(alternateLang);
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alternateLangLength =
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uloc_getLanguage(
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alternateTags,
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alternateLang,
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alternateLangLength,
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err);
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if(U_FAILURE(*err) ||
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alternateLangLength >= ULOC_LANG_CAPACITY) {
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goto error;
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}
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else if (alternateLangLength == 0) {
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/*
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* Use the empty string for an unknown language, if
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* we found no language.
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*/
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}
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else {
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appendTag(
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alternateLang,
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alternateLangLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/false);
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}
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}
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if (scriptLength > 0) {
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appendTag(
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script,
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scriptLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/true);
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}
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else if (alternateTags != NULL) {
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/*
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* Parse the alternateTags string for the script.
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*/
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char alternateScript[ULOC_SCRIPT_CAPACITY];
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const int32_t alternateScriptLength =
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uloc_getScript(
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alternateTags,
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alternateScript,
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sizeof(alternateScript),
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err);
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if (U_FAILURE(*err) ||
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alternateScriptLength >= ULOC_SCRIPT_CAPACITY) {
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goto error;
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}
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else if (alternateScriptLength > 0) {
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appendTag(
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alternateScript,
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alternateScriptLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/true);
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}
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}
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if (regionLength > 0) {
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appendTag(
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region,
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regionLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/true);
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regionAppended = true;
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}
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else if (alternateTags != NULL) {
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/*
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* Parse the alternateTags string for the region.
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*/
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char alternateRegion[ULOC_COUNTRY_CAPACITY];
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const int32_t alternateRegionLength =
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uloc_getCountry(
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alternateTags,
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alternateRegion,
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sizeof(alternateRegion),
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err);
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if (U_FAILURE(*err) ||
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alternateRegionLength >= ULOC_COUNTRY_CAPACITY) {
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goto error;
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}
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else if (alternateRegionLength > 0) {
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appendTag(
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alternateRegion,
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alternateRegionLength,
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tagBuffer,
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&tagLength,
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/*withSeparator=*/true);
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regionAppended = true;
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}
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}
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/**
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* Copy the partial tag from our internal buffer to the supplied
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* target.
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**/
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sink.Append(tagBuffer, tagLength);
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if (trailingLength > 0) {
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if (*trailing != '@') {
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sink.Append("_", 1);
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if (!regionAppended) {
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/* extra separator is required */
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sink.Append("_", 1);
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}
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}
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/*
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* Copy the trailing data into the supplied buffer.
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*/
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sink.Append(trailing, trailingLength);
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}
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return;
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}
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error:
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/**
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* An overflow indicates the locale ID passed in
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* is ill-formed. If we got here, and there was
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* no previous error, it's an implicit overflow.
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**/
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if (*err == U_BUFFER_OVERFLOW_ERROR ||
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U_SUCCESS(*err)) {
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*err = U_ILLEGAL_ARGUMENT_ERROR;
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}
|
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}
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|
|
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/**
|
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* Create a tag string from the supplied parameters. The lang, script and region
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* parameters may be NULL pointers. If they are, their corresponding length parameters
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* must be less than or equal to 0. If the lang parameter is an empty string, the
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* default value for an unknown language is written to the output buffer.
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*
|
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* If the length of the new string exceeds the capacity of the output buffer,
|
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* the function copies as many bytes to the output buffer as it can, and returns
|
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* the error U_BUFFER_OVERFLOW_ERROR.
|
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*
|
|
* If an illegal argument is provided, the function returns the error
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* U_ILLEGAL_ARGUMENT_ERROR.
|
|
*
|
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* @param lang The language tag to use.
|
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* @param langLength The length of the language tag.
|
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* @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 trailing Any trailing data to append to the new tag.
|
|
* @param trailingLength The length of the trailing data.
|
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* @param sink The output sink receiving the tag string.
|
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* @param err A pointer to a UErrorCode for error reporting.
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**/
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static void U_CALLCONV
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createTagString(
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const char* lang,
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int32_t langLength,
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const char* script,
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int32_t scriptLength,
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const char* region,
|
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int32_t regionLength,
|
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const char* trailing,
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int32_t trailingLength,
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icu::ByteSink& sink,
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UErrorCode* err)
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{
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createTagStringWithAlternates(
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lang,
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langLength,
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script,
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scriptLength,
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region,
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regionLength,
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trailing,
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trailingLength,
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NULL,
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sink,
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err);
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}
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|
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/**
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* Parse the language, script, and region subtags from a tag string, and copy the
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* results into the corresponding output parameters. The buffers are null-terminated,
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* unless overflow occurs.
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*
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* The langLength, scriptLength, and regionLength parameters are input/output
|
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* parameters, and must contain the capacity of their corresponding buffers on
|
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* input. On output, they will contain the actual length of the buffers, not
|
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* including the null terminator.
|
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*
|
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* If the length of any of the output subtags exceeds the capacity of the corresponding
|
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* buffer, the function copies as many bytes to the output buffer as it can, and returns
|
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* the error U_BUFFER_OVERFLOW_ERROR. It will not parse any more subtags once overflow
|
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* occurs.
|
|
*
|
|
* If an illegal argument is provided, the function returns the error
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* U_ILLEGAL_ARGUMENT_ERROR.
|
|
*
|
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* @param localeID The locale ID to parse.
|
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* @param lang The language tag buffer.
|
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* @param langLength The length of the language tag.
|
|
* @param script The script tag buffer.
|
|
* @param scriptLength The length of the script tag.
|
|
* @param region The region tag buffer.
|
|
* @param regionLength The length of the region tag.
|
|
* @param err A pointer to a UErrorCode for error reporting.
|
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* @return The number of chars of the localeID parameter consumed.
|
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**/
|
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static int32_t U_CALLCONV
|
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parseTagString(
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const char* localeID,
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char* lang,
|
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int32_t* langLength,
|
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char* script,
|
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int32_t* scriptLength,
|
|
char* region,
|
|
int32_t* regionLength,
|
|
UErrorCode* err)
|
|
{
|
|
const char* position = localeID;
|
|
int32_t subtagLength = 0;
|
|
|
|
if(U_FAILURE(*err) ||
|
|
localeID == NULL ||
|
|
lang == NULL ||
|
|
langLength == NULL ||
|
|
script == NULL ||
|
|
scriptLength == NULL ||
|
|
region == NULL ||
|
|
regionLength == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
subtagLength = ulocimp_getLanguage(position, &position, *err).extract(lang, *langLength, *err);
|
|
|
|
/*
|
|
* Note that we explicit consider U_STRING_NOT_TERMINATED_WARNING
|
|
* to be an error, because it indicates the user-supplied tag is
|
|
* not well-formed.
|
|
*/
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
*langLength = subtagLength;
|
|
|
|
/*
|
|
* If no language was present, use the empty string instead.
|
|
* Otherwise, move past any separator.
|
|
*/
|
|
if (_isIDSeparator(*position)) {
|
|
++position;
|
|
}
|
|
|
|
subtagLength = ulocimp_getScript(position, &position, *err).extract(script, *scriptLength, *err);
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
*scriptLength = subtagLength;
|
|
|
|
if (*scriptLength > 0) {
|
|
if (uprv_strnicmp(script, unknownScript, *scriptLength) == 0) {
|
|
/**
|
|
* If the script part is the "unknown" script, then don't return it.
|
|
**/
|
|
*scriptLength = 0;
|
|
}
|
|
|
|
/*
|
|
* Move past any separator.
|
|
*/
|
|
if (_isIDSeparator(*position)) {
|
|
++position;
|
|
}
|
|
}
|
|
|
|
subtagLength = ulocimp_getCountry(position, &position, *err).extract(region, *regionLength, *err);
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
*regionLength = subtagLength;
|
|
|
|
if (*regionLength > 0) {
|
|
if (uprv_strnicmp(region, unknownRegion, *regionLength) == 0) {
|
|
/**
|
|
* If the region part is the "unknown" region, then don't return it.
|
|
**/
|
|
*regionLength = 0;
|
|
}
|
|
} else if (*position != 0 && *position != '@') {
|
|
/* back up over consumed trailing separator */
|
|
--position;
|
|
}
|
|
|
|
exit:
|
|
|
|
return (int32_t)(position - localeID);
|
|
|
|
error:
|
|
|
|
/**
|
|
* If we get here, we have no explicit error, it's the result of an
|
|
* illegal argument.
|
|
**/
|
|
if (!U_FAILURE(*err)) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
|
|
goto exit;
|
|
}
|
|
|
|
static UBool U_CALLCONV
|
|
createLikelySubtagsString(
|
|
const char* lang,
|
|
int32_t langLength,
|
|
const char* script,
|
|
int32_t scriptLength,
|
|
const char* region,
|
|
int32_t regionLength,
|
|
const char* variants,
|
|
int32_t variantsLength,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* err) {
|
|
/**
|
|
* ULOC_FULLNAME_CAPACITY will provide enough capacity
|
|
* that we can build a string that contains the language,
|
|
* script and region code without worrying about overrunning
|
|
* the user-supplied buffer.
|
|
**/
|
|
char likelySubtagsBuffer[ULOC_FULLNAME_CAPACITY];
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
/**
|
|
* Try the language with the script and region first.
|
|
**/
|
|
if (scriptLength > 0 && regionLength > 0) {
|
|
|
|
const char* likelySubtags = NULL;
|
|
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink sink(&tagBuffer);
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
region,
|
|
regionLength,
|
|
NULL,
|
|
0,
|
|
sink,
|
|
err);
|
|
}
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
likelySubtags =
|
|
findLikelySubtags(
|
|
tagBuffer.data(),
|
|
likelySubtagsBuffer,
|
|
sizeof(likelySubtagsBuffer),
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
if (likelySubtags != NULL) {
|
|
/* Always use the language tag from the
|
|
maximal string, since it may be more
|
|
specific than the one provided. */
|
|
createTagStringWithAlternates(
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
variants,
|
|
variantsLength,
|
|
likelySubtags,
|
|
sink,
|
|
err);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Try the language with just the script.
|
|
**/
|
|
if (scriptLength > 0) {
|
|
|
|
const char* likelySubtags = NULL;
|
|
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink sink(&tagBuffer);
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
sink,
|
|
err);
|
|
}
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
likelySubtags =
|
|
findLikelySubtags(
|
|
tagBuffer.data(),
|
|
likelySubtagsBuffer,
|
|
sizeof(likelySubtagsBuffer),
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
if (likelySubtags != NULL) {
|
|
/* Always use the language tag from the
|
|
maximal string, since it may be more
|
|
specific than the one provided. */
|
|
createTagStringWithAlternates(
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
region,
|
|
regionLength,
|
|
variants,
|
|
variantsLength,
|
|
likelySubtags,
|
|
sink,
|
|
err);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Try the language with just the region.
|
|
**/
|
|
if (regionLength > 0) {
|
|
|
|
const char* likelySubtags = NULL;
|
|
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink sink(&tagBuffer);
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
region,
|
|
regionLength,
|
|
NULL,
|
|
0,
|
|
sink,
|
|
err);
|
|
}
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
likelySubtags =
|
|
findLikelySubtags(
|
|
tagBuffer.data(),
|
|
likelySubtagsBuffer,
|
|
sizeof(likelySubtagsBuffer),
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
if (likelySubtags != NULL) {
|
|
/* Always use the language tag from the
|
|
maximal string, since it may be more
|
|
specific than the one provided. */
|
|
createTagStringWithAlternates(
|
|
NULL,
|
|
0,
|
|
script,
|
|
scriptLength,
|
|
NULL,
|
|
0,
|
|
variants,
|
|
variantsLength,
|
|
likelySubtags,
|
|
sink,
|
|
err);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Finally, try just the language.
|
|
**/
|
|
{
|
|
const char* likelySubtags = NULL;
|
|
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink sink(&tagBuffer);
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
sink,
|
|
err);
|
|
}
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
likelySubtags =
|
|
findLikelySubtags(
|
|
tagBuffer.data(),
|
|
likelySubtagsBuffer,
|
|
sizeof(likelySubtagsBuffer),
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
if (likelySubtags != NULL) {
|
|
/* Always use the language tag from the
|
|
maximal string, since it may be more
|
|
specific than the one provided. */
|
|
createTagStringWithAlternates(
|
|
NULL,
|
|
0,
|
|
script,
|
|
scriptLength,
|
|
region,
|
|
regionLength,
|
|
variants,
|
|
variantsLength,
|
|
likelySubtags,
|
|
sink,
|
|
err);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
|
|
error:
|
|
|
|
if (!U_FAILURE(*err)) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#define CHECK_TRAILING_VARIANT_SIZE(trailing, trailingLength) UPRV_BLOCK_MACRO_BEGIN { \
|
|
int32_t count = 0; \
|
|
int32_t i; \
|
|
for (i = 0; i < trailingLength; i++) { \
|
|
if (trailing[i] == '-' || trailing[i] == '_') { \
|
|
count = 0; \
|
|
if (count > 8) { \
|
|
goto error; \
|
|
} \
|
|
} else if (trailing[i] == '@') { \
|
|
break; \
|
|
} else if (count > 8) { \
|
|
goto error; \
|
|
} else { \
|
|
count++; \
|
|
} \
|
|
} \
|
|
} UPRV_BLOCK_MACRO_END
|
|
|
|
static UBool
|
|
_uloc_addLikelySubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* err) {
|
|
char lang[ULOC_LANG_CAPACITY];
|
|
int32_t langLength = sizeof(lang);
|
|
char script[ULOC_SCRIPT_CAPACITY];
|
|
int32_t scriptLength = sizeof(script);
|
|
char region[ULOC_COUNTRY_CAPACITY];
|
|
int32_t regionLength = sizeof(region);
|
|
const char* trailing = "";
|
|
int32_t trailingLength = 0;
|
|
int32_t trailingIndex = 0;
|
|
UBool success = false;
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
if (localeID == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
trailingIndex = parseTagString(
|
|
localeID,
|
|
lang,
|
|
&langLength,
|
|
script,
|
|
&scriptLength,
|
|
region,
|
|
®ionLength,
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
/* Overflow indicates an illegal argument error */
|
|
if (*err == U_BUFFER_OVERFLOW_ERROR) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
|
|
goto error;
|
|
}
|
|
|
|
/* Find the length of the trailing portion. */
|
|
while (_isIDSeparator(localeID[trailingIndex])) {
|
|
trailingIndex++;
|
|
}
|
|
trailing = &localeID[trailingIndex];
|
|
trailingLength = (int32_t)uprv_strlen(trailing);
|
|
|
|
CHECK_TRAILING_VARIANT_SIZE(trailing, trailingLength);
|
|
|
|
success =
|
|
createLikelySubtagsString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
region,
|
|
regionLength,
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
|
|
if (!success) {
|
|
const int32_t localIDLength = (int32_t)uprv_strlen(localeID);
|
|
|
|
/*
|
|
* If we get here, we need to return localeID.
|
|
*/
|
|
sink.Append(localeID, localIDLength);
|
|
}
|
|
|
|
return success;
|
|
|
|
error:
|
|
|
|
if (!U_FAILURE(*err)) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Add likely subtags to the sink
|
|
// return true if the value in the sink is produced by a match during the lookup
|
|
// return false if the value in the sink is the same as input because there are
|
|
// no match after the lookup.
|
|
static UBool _ulocimp_addLikelySubtags(const char*, icu::ByteSink&, UErrorCode*);
|
|
|
|
static void
|
|
_uloc_minimizeSubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* err) {
|
|
icu::CharString maximizedTagBuffer;
|
|
|
|
char lang[ULOC_LANG_CAPACITY];
|
|
int32_t langLength = sizeof(lang);
|
|
char script[ULOC_SCRIPT_CAPACITY];
|
|
int32_t scriptLength = sizeof(script);
|
|
char region[ULOC_COUNTRY_CAPACITY];
|
|
int32_t regionLength = sizeof(region);
|
|
const char* trailing = "";
|
|
int32_t trailingLength = 0;
|
|
int32_t trailingIndex = 0;
|
|
UBool successGetMax = false;
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
else if (localeID == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
trailingIndex =
|
|
parseTagString(
|
|
localeID,
|
|
lang,
|
|
&langLength,
|
|
script,
|
|
&scriptLength,
|
|
region,
|
|
®ionLength,
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
|
|
/* Overflow indicates an illegal argument error */
|
|
if (*err == U_BUFFER_OVERFLOW_ERROR) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
|
|
goto error;
|
|
}
|
|
|
|
/* Find the spot where the variants or the keywords begin, if any. */
|
|
while (_isIDSeparator(localeID[trailingIndex])) {
|
|
trailingIndex++;
|
|
}
|
|
trailing = &localeID[trailingIndex];
|
|
trailingLength = (int32_t)uprv_strlen(trailing);
|
|
|
|
CHECK_TRAILING_VARIANT_SIZE(trailing, trailingLength);
|
|
|
|
{
|
|
icu::CharString base;
|
|
{
|
|
icu::CharStringByteSink baseSink(&base);
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
region,
|
|
regionLength,
|
|
NULL,
|
|
0,
|
|
baseSink,
|
|
err);
|
|
}
|
|
|
|
/**
|
|
* First, we need to first get the maximization
|
|
* from AddLikelySubtags.
|
|
**/
|
|
{
|
|
icu::CharStringByteSink maxSink(&maximizedTagBuffer);
|
|
successGetMax = _ulocimp_addLikelySubtags(base.data(), maxSink, err);
|
|
}
|
|
}
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
if (!successGetMax) {
|
|
/**
|
|
* If we got here, return the locale ID parameter unchanged.
|
|
**/
|
|
const int32_t localeIDLength = (int32_t)uprv_strlen(localeID);
|
|
sink.Append(localeID, localeIDLength);
|
|
return;
|
|
}
|
|
|
|
// In the following, the lang, script, region are referring to those in
|
|
// the maximizedTagBuffer, not the one in the localeID.
|
|
langLength = sizeof(lang);
|
|
scriptLength = sizeof(script);
|
|
regionLength = sizeof(region);
|
|
parseTagString(
|
|
maximizedTagBuffer.data(),
|
|
lang,
|
|
&langLength,
|
|
script,
|
|
&scriptLength,
|
|
region,
|
|
®ionLength,
|
|
err);
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
|
|
/**
|
|
* Start first with just the language.
|
|
**/
|
|
{
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink tagSink(&tagBuffer);
|
|
createLikelySubtagsString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
tagSink,
|
|
err);
|
|
}
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
else if (!tagBuffer.isEmpty() &&
|
|
uprv_strnicmp(
|
|
maximizedTagBuffer.data(),
|
|
tagBuffer.data(),
|
|
tagBuffer.length()) == 0) {
|
|
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Next, try the language and region.
|
|
**/
|
|
if (regionLength > 0) {
|
|
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink tagSink(&tagBuffer);
|
|
createLikelySubtagsString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
region,
|
|
regionLength,
|
|
NULL,
|
|
0,
|
|
tagSink,
|
|
err);
|
|
}
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
else if (!tagBuffer.isEmpty() &&
|
|
uprv_strnicmp(
|
|
maximizedTagBuffer.data(),
|
|
tagBuffer.data(),
|
|
tagBuffer.length()) == 0) {
|
|
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
NULL,
|
|
0,
|
|
region,
|
|
regionLength,
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Finally, try the language and script. This is our last chance,
|
|
* since trying with all three subtags would only yield the
|
|
* maximal version that we already have.
|
|
**/
|
|
if (scriptLength > 0) {
|
|
icu::CharString tagBuffer;
|
|
{
|
|
icu::CharStringByteSink tagSink(&tagBuffer);
|
|
createLikelySubtagsString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
NULL,
|
|
0,
|
|
NULL,
|
|
0,
|
|
tagSink,
|
|
err);
|
|
}
|
|
|
|
if(U_FAILURE(*err)) {
|
|
goto error;
|
|
}
|
|
else if (!tagBuffer.isEmpty() &&
|
|
uprv_strnicmp(
|
|
maximizedTagBuffer.data(),
|
|
tagBuffer.data(),
|
|
tagBuffer.length()) == 0) {
|
|
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
NULL,
|
|
0,
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
{
|
|
/**
|
|
* If we got here, return the max + trail.
|
|
**/
|
|
createTagString(
|
|
lang,
|
|
langLength,
|
|
script,
|
|
scriptLength,
|
|
region,
|
|
regionLength,
|
|
trailing,
|
|
trailingLength,
|
|
sink,
|
|
err);
|
|
return;
|
|
}
|
|
|
|
error:
|
|
|
|
if (!U_FAILURE(*err)) {
|
|
*err = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
}
|
|
|
|
static int32_t
|
|
do_canonicalize(const char* localeID,
|
|
char* buffer,
|
|
int32_t bufferCapacity,
|
|
UErrorCode* err)
|
|
{
|
|
int32_t canonicalizedSize = uloc_canonicalize(
|
|
localeID,
|
|
buffer,
|
|
bufferCapacity,
|
|
err);
|
|
|
|
if (*err == U_STRING_NOT_TERMINATED_WARNING ||
|
|
*err == U_BUFFER_OVERFLOW_ERROR) {
|
|
return canonicalizedSize;
|
|
}
|
|
else if (U_FAILURE(*err)) {
|
|
|
|
return -1;
|
|
}
|
|
else {
|
|
return canonicalizedSize;
|
|
}
|
|
}
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
uloc_addLikelySubtags(const char* localeID,
|
|
char* maximizedLocaleID,
|
|
int32_t maximizedLocaleIDCapacity,
|
|
UErrorCode* status) {
|
|
if (U_FAILURE(*status)) {
|
|
return 0;
|
|
}
|
|
|
|
icu::CheckedArrayByteSink sink(
|
|
maximizedLocaleID, maximizedLocaleIDCapacity);
|
|
|
|
ulocimp_addLikelySubtags(localeID, sink, status);
|
|
int32_t reslen = sink.NumberOfBytesAppended();
|
|
|
|
if (U_FAILURE(*status)) {
|
|
return sink.Overflowed() ? reslen : -1;
|
|
}
|
|
|
|
if (sink.Overflowed()) {
|
|
*status = U_BUFFER_OVERFLOW_ERROR;
|
|
} else {
|
|
u_terminateChars(
|
|
maximizedLocaleID, maximizedLocaleIDCapacity, reslen, status);
|
|
}
|
|
|
|
return reslen;
|
|
}
|
|
|
|
static UBool
|
|
_ulocimp_addLikelySubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* status) {
|
|
PreflightingLocaleIDBuffer localeBuffer;
|
|
do {
|
|
localeBuffer.requestedCapacity = do_canonicalize(localeID, localeBuffer.getBuffer(),
|
|
localeBuffer.getCapacity(), status);
|
|
} while (localeBuffer.needToTryAgain(status));
|
|
|
|
if (U_SUCCESS(*status)) {
|
|
return _uloc_addLikelySubtags(localeBuffer.getBuffer(), sink, status);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
U_CAPI void U_EXPORT2
|
|
ulocimp_addLikelySubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* status) {
|
|
_ulocimp_addLikelySubtags(localeID, sink, status);
|
|
}
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
uloc_minimizeSubtags(const char* localeID,
|
|
char* minimizedLocaleID,
|
|
int32_t minimizedLocaleIDCapacity,
|
|
UErrorCode* status) {
|
|
if (U_FAILURE(*status)) {
|
|
return 0;
|
|
}
|
|
|
|
icu::CheckedArrayByteSink sink(
|
|
minimizedLocaleID, minimizedLocaleIDCapacity);
|
|
|
|
ulocimp_minimizeSubtags(localeID, sink, status);
|
|
int32_t reslen = sink.NumberOfBytesAppended();
|
|
|
|
if (U_FAILURE(*status)) {
|
|
return sink.Overflowed() ? reslen : -1;
|
|
}
|
|
|
|
if (sink.Overflowed()) {
|
|
*status = U_BUFFER_OVERFLOW_ERROR;
|
|
} else {
|
|
u_terminateChars(
|
|
minimizedLocaleID, minimizedLocaleIDCapacity, reslen, status);
|
|
}
|
|
|
|
return reslen;
|
|
}
|
|
|
|
U_CAPI void U_EXPORT2
|
|
ulocimp_minimizeSubtags(const char* localeID,
|
|
icu::ByteSink& sink,
|
|
UErrorCode* status) {
|
|
PreflightingLocaleIDBuffer localeBuffer;
|
|
do {
|
|
localeBuffer.requestedCapacity = do_canonicalize(localeID, localeBuffer.getBuffer(),
|
|
localeBuffer.getCapacity(), status);
|
|
} while (localeBuffer.needToTryAgain(status));
|
|
|
|
_uloc_minimizeSubtags(localeBuffer.getBuffer(), sink, 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;
|
|
char script[8];
|
|
int32_t scriptLength = uloc_getScript(locale, script, UPRV_LENGTHOF(script), &errorCode);
|
|
if (U_FAILURE(errorCode) || errorCode == U_STRING_NOT_TERMINATED_WARNING ||
|
|
scriptLength == 0) {
|
|
// Fastpath: We know the likely scripts and their writing direction
|
|
// for some common languages.
|
|
errorCode = U_ZERO_ERROR;
|
|
char lang[8];
|
|
int32_t langLength = uloc_getLanguage(locale, lang, UPRV_LENGTHOF(lang), &errorCode);
|
|
if (U_FAILURE(errorCode) || errorCode == U_STRING_NOT_TERMINATED_WARNING) {
|
|
return false;
|
|
}
|
|
if (langLength > 0) {
|
|
const char* langPtr = uprv_strstr(LANG_DIR_STRING, lang);
|
|
if (langPtr != NULL) {
|
|
switch (langPtr[langLength]) {
|
|
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;
|
|
{
|
|
icu::CharStringByteSink sink(&likely);
|
|
ulocimp_addLikelySubtags(locale, sink, &errorCode);
|
|
}
|
|
if (U_FAILURE(errorCode) || errorCode == U_STRING_NOT_TERMINATED_WARNING) {
|
|
return false;
|
|
}
|
|
scriptLength = uloc_getScript(likely.data(), script, UPRV_LENGTHOF(script), &errorCode);
|
|
if (U_FAILURE(errorCode) || errorCode == U_STRING_NOT_TERMINATED_WARNING ||
|
|
scriptLength == 0) {
|
|
return false;
|
|
}
|
|
}
|
|
UScriptCode scriptCode = (UScriptCode)u_getPropertyValueEnum(UCHAR_SCRIPT, script);
|
|
return uscript_isRightToLeft(scriptCode);
|
|
}
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
UBool
|
|
Locale::isRightToLeft() const {
|
|
return uloc_isRightToLeft(getBaseName());
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
// The following must at least allow for rg key value (6) plus terminator (1).
|
|
#define ULOC_RG_BUFLEN 8
|
|
|
|
U_CAPI int32_t U_EXPORT2
|
|
ulocimp_getRegionForSupplementalData(const char *localeID, UBool inferRegion,
|
|
char *region, int32_t regionCapacity, UErrorCode* status) {
|
|
if (U_FAILURE(*status)) {
|
|
return 0;
|
|
}
|
|
char rgBuf[ULOC_RG_BUFLEN];
|
|
UErrorCode rgStatus = U_ZERO_ERROR;
|
|
|
|
// First check for rg keyword value
|
|
int32_t rgLen = uloc_getKeywordValue(localeID, "rg", rgBuf, ULOC_RG_BUFLEN, &rgStatus);
|
|
if (U_FAILURE(rgStatus) || rgLen != 6) {
|
|
rgLen = 0;
|
|
} else {
|
|
// rgBuf guaranteed to be zero terminated here, with text len 6
|
|
char *rgPtr = rgBuf;
|
|
for (; *rgPtr!= 0; rgPtr++) {
|
|
*rgPtr = uprv_toupper(*rgPtr);
|
|
}
|
|
rgLen = (uprv_strcmp(rgBuf+2, "ZZZZ") == 0)? 2: 0;
|
|
}
|
|
|
|
if (rgLen == 0) {
|
|
// No valid rg keyword value, try for unicode_region_subtag
|
|
rgLen = uloc_getCountry(localeID, rgBuf, ULOC_RG_BUFLEN, status);
|
|
if (U_FAILURE(*status)) {
|
|
rgLen = 0;
|
|
} else if (rgLen == 0 && inferRegion) {
|
|
// no unicode_region_subtag but inferRegion true, try likely subtags
|
|
rgStatus = U_ZERO_ERROR;
|
|
icu::CharString locBuf;
|
|
{
|
|
icu::CharStringByteSink sink(&locBuf);
|
|
ulocimp_addLikelySubtags(localeID, sink, &rgStatus);
|
|
}
|
|
if (U_SUCCESS(rgStatus)) {
|
|
rgLen = uloc_getCountry(locBuf.data(), rgBuf, ULOC_RG_BUFLEN, status);
|
|
if (U_FAILURE(*status)) {
|
|
rgLen = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
rgBuf[rgLen] = 0;
|
|
uprv_strncpy(region, rgBuf, regionCapacity);
|
|
return u_terminateChars(region, regionCapacity, rgLen, status);
|
|
}
|
|
|