godot/thirdparty/icu4c/common/loclikely.cpp

// © 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) { … }

bool CHECK_TRAILING_VARIANT_SIZE(const char* variant, int32_t variantLength) { … }

void
_uloc_addLikelySubtags(const char* localeID,
                       icu::ByteSink& sink,
                       UErrorCode& err) { … }

void
_uloc_minimizeSubtags(const char* localeID,
                      icu::ByteSink& sink,
                      bool favorScript,
                      UErrorCode& err) { … }

}  // namespace

U_CAPI int32_t U_EXPORT2
uloc_addLikelySubtags(const char* localeID,
                      char* maximizedLocaleID,
                      int32_t maximizedLocaleIDCapacity,
                      UErrorCode* status) { … }

U_EXPORT icu::CharString
ulocimp_addLikelySubtags(const char* localeID,
                         UErrorCode& status) { … }

U_EXPORT void
ulocimp_addLikelySubtags(const char* localeID,
                         icu::ByteSink& sink,
                         UErrorCode& status) { … }

U_CAPI int32_t U_EXPORT2
uloc_minimizeSubtags(const char* localeID,
                     char* minimizedLocaleID,
                     int32_t minimizedLocaleIDCapacity,
                     UErrorCode* status) { … }

U_EXPORT icu::CharString
ulocimp_minimizeSubtags(const char* localeID,
                        bool favorScript,
                        UErrorCode& status) { … }

U_EXPORT void
ulocimp_minimizeSubtags(const char* localeID,
                        icu::ByteSink& sink,
                        bool favorScript,
                        UErrorCode& 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[] = …;

// Implemented here because this calls ulocimp_addLikelySubtags().
U_CAPI UBool U_EXPORT2
uloc_isRightToLeft(const char *locale) { … }

U_NAMESPACE_BEGIN

UBool
Locale::isRightToLeft() const { … }

U_NAMESPACE_END

namespace {
icu::CharString
GetRegionFromKey(const char* localeID, const char* key, UErrorCode& status) { … }
}  // namespace

U_EXPORT icu::CharString
ulocimp_getRegionForSupplementalData(const char *localeID, bool inferRegion,
                                     UErrorCode& status) { … }