Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 378 insertions, 0 deletions

diff --git a/intl/icu/source/common/ulocimp.h b/intl/icu/source/common/ulocimp.h
new file mode 100644
index 0000000000..48341054e3
--- /dev/null
+++ b/intl/icu/source/common/ulocimp.h
@@ -0,0 +1,378 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+**********************************************************************
+*   Copyright (C) 2004-2016, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*/
+
+#ifndef ULOCIMP_H
+#define ULOCIMP_H
+
+#include "unicode/bytestream.h"
+#include "unicode/uloc.h"
+
+#include "charstr.h"
+
+/**
+ * Create an iterator over the specified keywords list
+ * @param keywordList double-null terminated list. Will be copied.
+ * @param keywordListSize size in bytes of keywordList
+ * @param status err code
+ * @return enumeration (owned by caller) of the keyword list.
+ * @internal ICU 3.0
+ */
+U_CAPI UEnumeration* U_EXPORT2
+uloc_openKeywordList(const char *keywordList, int32_t keywordListSize, UErrorCode* status);
+
+/**
+ * Look up a resource bundle table item with fallback on the table level.
+ * This is accessible so it can be called by C++ code.
+ */
+U_CAPI const UChar * U_EXPORT2
+uloc_getTableStringWithFallback(
+    const char *path,
+    const char *locale,
+    const char *tableKey,
+    const char *subTableKey,
+    const char *itemKey,
+    int32_t *pLength,
+    UErrorCode *pErrorCode);
+
+/*returns true if a is an ID separator false otherwise*/
+#define _isIDSeparator(a) (a == '_' || a == '-')
+
+U_CFUNC const char* 
+uloc_getCurrentCountryID(const char* oldID);
+
+U_CFUNC const char* 
+uloc_getCurrentLanguageID(const char* oldID);
+
+U_CFUNC void
+ulocimp_getKeywords(const char *localeID,
+             char prev,
+             icu::ByteSink& sink,
+             UBool valuesToo,
+             UErrorCode *status);
+
+icu::CharString U_EXPORT2
+ulocimp_getLanguage(const char *localeID,
+                    const char **pEnd,
+                    UErrorCode &status);
+
+icu::CharString U_EXPORT2
+ulocimp_getScript(const char *localeID,
+                  const char **pEnd,
+                  UErrorCode &status);
+
+icu::CharString U_EXPORT2
+ulocimp_getCountry(const char *localeID,
+                   const char **pEnd,
+                   UErrorCode &status);
+
+U_CAPI void U_EXPORT2
+ulocimp_getName(const char* localeID,
+                icu::ByteSink& sink,
+                UErrorCode* err);
+
+U_CAPI void U_EXPORT2
+ulocimp_getBaseName(const char* localeID,
+                    icu::ByteSink& sink,
+                    UErrorCode* err);
+
+U_CAPI void U_EXPORT2
+ulocimp_canonicalize(const char* localeID,
+                     icu::ByteSink& sink,
+                     UErrorCode* err);
+
+U_CAPI void U_EXPORT2
+ulocimp_getKeywordValue(const char* localeID,
+                        const char* keywordName,
+                        icu::ByteSink& sink,
+                        UErrorCode* status);
+
+/**
+ * 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_CAPI 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 BCP 47, and so
+ * supports legacy language tags (marked as “Type: grandfathered” in BCP 47)
+ * (regular and irregular) as well as private use language tags.
+ *
+ * Private use tags are represented as 'x-whatever',
+ * and legacy tags are converted to their canonical replacements where they exist.
+ *
+ * Note that a few legacy 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
+ * (2) any unicode_region_tag in the locale ID; if none then
+ * (3) if inferRegion is true, the region suggested by
+ * getLikelySubtags on the localeID.
+ * If no region is found, returns length 0.
+ * 
+ * @param localeID
+ *     The complete locale ID (with keywords) from which
+ *     to get the region to use for supplemental data.
+ * @param inferRegion
+ *     If true, will try to infer region from localeID if
+ *     no other region is found.
+ * @param region
+ *     Buffer in which to put the region ID found; should
+ *     have a capacity at least ULOC_COUNTRY_CAPACITY. 
+ * @param regionCapacity
+ *     The actual capacity of the region buffer.
+ * @param status
+ *     Pointer to in/out UErrorCode value for latest status.
+ * @return
+ *     The length of any region code found, or 0 if none.
+ * @internal ICU 57
+ */
+U_CAPI int32_t U_EXPORT2
+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_CAPI 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_CAPI 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_CAPI const char * U_EXPORT2
+ultag_getTKeyStart(const char *localeID);
+
+U_CFUNC const char*
+ulocimp_toBcpKey(const char* key);
+
+U_CFUNC const char*
+ulocimp_toLegacyKey(const char* key);
+
+U_CFUNC const char*
+ulocimp_toBcpType(const char* key, const char* type, UBool* isKnownKey, UBool* isSpecialType);
+
+U_CFUNC const char*
+ulocimp_toLegacyType(const char* key, const char* type, UBool* isKnownKey, UBool* isSpecialType);
+
+/* Function for testing purpose */
+U_CAPI const char* const* ulocimp_getKnownCanonicalizedLocaleForTest(int32_t* length);
+
+// Return true if the value is already canonicalized.
+U_CAPI bool ulocimp_isCanonicalizedLocaleForTest(const char* localeName);
+
+/**
+ * A utility class for handling locale IDs that may be longer than ULOC_FULLNAME_CAPACITY.
+ * This encompasses all of the logic to allocate a temporary locale ID buffer on the stack,
+ * and then, if it's not big enough, reallocate it on the heap and try again.
+ *
+ * You use it like this:
+ * UErrorCode err = U_ZERO_ERROR;
+ *
+ * PreflightingLocaleIDBuffer tempBuffer;
+ * do {
+ *     tempBuffer.requestedCapacity = uloc_doSomething(localeID, tempBuffer.getBuffer(), tempBuffer.getCapacity(), &err);
+ * } while (tempBuffer.needToTryAgain(&err));
+ * if (U_SUCCESS(err)) {
+ *     uloc_doSomethingWithTheResult(tempBuffer.getBuffer());
+ * }
+ */
+class PreflightingLocaleIDBuffer {
+private:
+    char stackBuffer[ULOC_FULLNAME_CAPACITY];
+    char* heapBuffer = nullptr;
+    int32_t capacity = ULOC_FULLNAME_CAPACITY;
+    
+public:
+    int32_t requestedCapacity = ULOC_FULLNAME_CAPACITY;
+
+    // No heap allocation. Use only on the stack.
+    static void* U_EXPORT2 operator new(size_t) noexcept = delete;
+    static void* U_EXPORT2 operator new[](size_t) noexcept = delete;
+#if U_HAVE_PLACEMENT_NEW
+    static void* U_EXPORT2 operator new(size_t, void*) noexcept = delete;
+#endif
+
+    PreflightingLocaleIDBuffer() {}
+    
+    ~PreflightingLocaleIDBuffer() { uprv_free(heapBuffer); }
+    
+    char* getBuffer() {
+        if (heapBuffer == nullptr) {
+            return stackBuffer;
+        } else {
+            return heapBuffer;
+        }
+    }
+    
+    int32_t getCapacity() {
+        return capacity;
+    }
+    
+    bool needToTryAgain(UErrorCode* err) {
+        if (heapBuffer != nullptr) {
+            return false;
+        }
+    
+        if (*err == U_BUFFER_OVERFLOW_ERROR || *err == U_STRING_NOT_TERMINATED_WARNING) {
+            int32_t newCapacity = requestedCapacity + 2;    // one for the terminating null, one just for paranoia
+            heapBuffer = static_cast<char*>(uprv_malloc(newCapacity));
+            if (heapBuffer == nullptr) {
+                *err = U_MEMORY_ALLOCATION_ERROR;
+            } else {
+                *err = U_ZERO_ERROR;
+                capacity = newCapacity;
+            }
+            return U_SUCCESS(*err);
+        }
+        return false;
+    }
+};
+
+#endif