#ifndef ULOCIMP_H
#define ULOCIMP_H
+#include "unicode/bytestream.h"
#include "unicode/uloc.h"
/**
char *country, int32_t countryCapacity,
const char **pEnd);
+/**
+ * Writes a well-formed language tag for this locale ID.
+ *
+ * **Note**: When `strict` is FALSE, any locale fields which do not satisfy the
+ * BCP47 syntax requirement will be omitted from the result. When `strict` is
+ * TRUE, this function sets U_ILLEGAL_ARGUMENT_ERROR to the `err` if any locale
+ * fields do not satisfy the BCP47 syntax requirement.
+ *
+ * @param localeID the input locale ID
+ * @param sink the output sink receiving the BCP47 language
+ * tag for this Locale.
+ * @param strict boolean value indicating if the function returns
+ * an error for an ill-formed input locale ID.
+ * @param err error information if receiving the language
+ * tag failed.
+ * @return The length of the BCP47 language tag.
+ *
+ * @internal ICU 64
+ */
+U_STABLE void U_EXPORT2
+ulocimp_toLanguageTag(const char* localeID,
+ icu::ByteSink& sink,
+ UBool strict,
+ UErrorCode* err);
+
+/**
+ * Returns a locale ID for the specified BCP47 language tag string.
+ * If the specified language tag contains any ill-formed subtags,
+ * the first such subtag and all following subtags are ignored.
+ * <p>
+ * This implements the 'Language-Tag' production of BCP47, and so
+ * supports grandfathered (regular and irregular) as well as private
+ * use language tags. Private use tags are represented as 'x-whatever',
+ * and grandfathered tags are converted to their canonical replacements
+ * where they exist. Note that a few grandfathered tags have no modern
+ * replacement, these will be converted using the fallback described in
+ * the first paragraph, so some information might be lost.
+ * @param langtag the input BCP47 language tag.
+ * @param tagLen the length of langtag, or -1 to call uprv_strlen().
+ * @param sink the output sink receiving a locale ID for the
+ * specified BCP47 language tag.
+ * @param parsedLength if not NULL, successfully parsed length
+ * for the input language tag is set.
+ * @param err error information if receiving the locald ID
+ * failed.
+ * @internal ICU 63
+ */
+U_CAPI void U_EXPORT2
+ulocimp_forLanguageTag(const char* langtag,
+ int32_t tagLen,
+ icu::ByteSink& sink,
+ int32_t* parsedLength,
+ UErrorCode* err);
+
/**
* Get the region to use for supplemental data lookup. Uses
* (1) any region specified by locale tag "rg"; if none then
ulocimp_getRegionForSupplementalData(const char *localeID, UBool inferRegion,
char *region, int32_t regionCapacity, UErrorCode* status);
+/**
+ * Add the likely subtags for a provided locale ID, per the algorithm described
+ * in the following CLDR technical report:
+ *
+ * http://www.unicode.org/reports/tr35/#Likely_Subtags
+ *
+ * If localeID is already in the maximal form, or there is no data available
+ * for maximization, it will be copied to the output buffer. For example,
+ * "und-Zzzz" cannot be maximized, since there is no reasonable maximization.
+ *
+ * Examples:
+ *
+ * "en" maximizes to "en_Latn_US"
+ *
+ * "de" maximizes to "de_Latn_US"
+ *
+ * "sr" maximizes to "sr_Cyrl_RS"
+ *
+ * "sh" maximizes to "sr_Latn_RS" (Note this will not reverse.)
+ *
+ * "zh_Hani" maximizes to "zh_Hans_CN" (Note this will not reverse.)
+ *
+ * @param localeID The locale to maximize
+ * @param sink The output sink receiving the maximized locale
+ * @param err Error information if maximizing the locale failed. If the length
+ * of the localeID and the null-terminator is greater than the maximum allowed size,
+ * or the localeId is not well-formed, the error code is U_ILLEGAL_ARGUMENT_ERROR.
+ * @internal ICU 64
+ */
+U_STABLE void U_EXPORT2
+ulocimp_addLikelySubtags(const char* localeID,
+ icu::ByteSink& sink,
+ UErrorCode* err);
+
+/**
+ * Minimize the subtags for a provided locale ID, per the algorithm described
+ * in the following CLDR technical report:
+ *
+ * http://www.unicode.org/reports/tr35/#Likely_Subtags
+ *
+ * If localeID is already in the minimal form, or there is no data available
+ * for minimization, it will be copied to the output buffer. Since the
+ * minimization algorithm relies on proper maximization, see the comments
+ * for ulocimp_addLikelySubtags for reasons why there might not be any data.
+ *
+ * Examples:
+ *
+ * "en_Latn_US" minimizes to "en"
+ *
+ * "de_Latn_US" minimizes to "de"
+ *
+ * "sr_Cyrl_RS" minimizes to "sr"
+ *
+ * "zh_Hant_TW" minimizes to "zh_TW" (The region is preferred to the
+ * script, and minimizing to "zh" would imply "zh_Hans_CN".)
+ *
+ * @param localeID The locale to minimize
+ * @param sink The output sink receiving the maximized locale
+ * @param err Error information if minimizing the locale failed. If the length
+ * of the localeID and the null-terminator is greater than the maximum allowed size,
+ * or the localeId is not well-formed, the error code is U_ILLEGAL_ARGUMENT_ERROR.
+ * @internal ICU 64
+ */
+U_STABLE void U_EXPORT2
+ulocimp_minimizeSubtags(const char* localeID,
+ icu::ByteSink& sink,
+ UErrorCode* err);
+
U_CAPI const char * U_EXPORT2
locale_getKeywordsStart(const char *localeID);
+U_CFUNC UBool
+ultag_isExtensionSubtags(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isLanguageSubtag(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isPrivateuseValueSubtags(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isRegionSubtag(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isScriptSubtag(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isTransformedExtensionSubtags(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isUnicodeExtensionSubtags(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isUnicodeLocaleAttribute(const char* s, int32_t len);
+
+U_CFUNC UBool
+ultag_isUnicodeLocaleAttributes(const char* s, int32_t len);
U_CFUNC UBool
ultag_isUnicodeLocaleKey(const char* s, int32_t len);
U_CFUNC UBool
ultag_isUnicodeLocaleType(const char* s, int32_t len);
+U_CFUNC UBool
+ultag_isVariantSubtags(const char* s, int32_t len);
+
U_CFUNC const char*
ulocimp_toBcpKey(const char* key);
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