The Tor Browser: intl/icu/source/common/locutil.cpp@b8a032363ba2 (annotated)

intl/icu/source/common/locutil.cpp@b8a032363ba2 (annotated)

intl/icu/source/common/locutil.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  *******************************************************************************
  * Copyright (C) 2002-2011, International Business Machines Corporation and
  * others. All Rights Reserved.
  *******************************************************************************
  */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_SERVICE || !UCONFIG_NO_TRANSLITERATION
 #include "unicode/resbund.h"
 #include "cmemory.h"
 #include "ustrfmt.h"
 #include "locutil.h"
 #include "charstr.h"
 #include "ucln_cmn.h"
 #include "uassert.h"
 #include "umutex.h"
 // see LocaleUtility::getAvailableLocaleNames
 static icu::Hashtable * LocaleUtility_cache = NULL;
 #define UNDERSCORE_CHAR ((UChar)0x005f)
 #define AT_SIGN_CHAR    ((UChar)64)
 #define PERIOD_CHAR     ((UChar)46)
 /*
  ******************************************************************
  */
 /**
  * Release all static memory held by Locale Utility.
  */
 U_CDECL_BEGIN
 static UBool U_CALLCONV service_cleanup(void) {
     if (LocaleUtility_cache) {
         delete LocaleUtility_cache;
         LocaleUtility_cache = NULL;
     }
     return TRUE;
 }
 U_CDECL_END
 U_NAMESPACE_BEGIN
 UnicodeString&
 LocaleUtility::canonicalLocaleString(const UnicodeString* id, UnicodeString& result)
 {
   if (id == NULL) {
     result.setToBogus();
   } else {
     // Fix case only (no other changes) up to the first '@' or '.' or
     // end of string, whichever comes first.  In 3.0 I changed this to
     // stop at first '@' or '.'.  It used to run out to the end of
     // string.  My fix makes the tests pass but is probably
     // structurally incorrect.  See below.  [alan 3.0]
     // TODO: Doug, you might want to revise this...
     result = *id;
     int32_t i = 0;
     int32_t end = result.indexOf(AT_SIGN_CHAR);
     int32_t n = result.indexOf(PERIOD_CHAR);
     if (n >= 0 && n < end) {
         end = n;
     }
     if (end < 0) {
         end = result.length();
     }
     n = result.indexOf(UNDERSCORE_CHAR);
     if (n < 0) {
       n = end;
     }
     for (; i < n; ++i) {
       UChar c = result.charAt(i);
       if (c >= 0x0041 && c <= 0x005a) {
         c += 0x20;
         result.setCharAt(i, c);
       }
     }
     for (n = end; i < n; ++i) {
       UChar c = result.charAt(i);
       if (c >= 0x0061 && c <= 0x007a) {
         c -= 0x20;
         result.setCharAt(i, c);
       }
     }
   }
   return result;
 #if 0
     // This code does a proper full level 2 canonicalization of id.
     // It's nasty to go from UChar to char to char to UChar -- but
     // that's what you have to do to use the uloc_canonicalize
     // function on UnicodeStrings.
     // I ended up doing the alternate fix (see above) not for
     // performance reasons, although performance will certainly be
     // better, but because doing a full level 2 canonicalization
     // causes some tests to fail.  [alan 3.0]
     // TODO: Doug, you might want to revisit this...
     result.setToBogus();
     if (id != 0) {
         int32_t buflen = id->length() + 8; // space for NUL
         char* buf = (char*) uprv_malloc(buflen);
         char* canon = (buf == 0) ? 0 : (char*) uprv_malloc(buflen);
         if (buf != 0 && canon != 0) {
             U_ASSERT(id->extract(0, INT32_MAX, buf, buflen) < buflen);
             UErrorCode ec = U_ZERO_ERROR;
             uloc_canonicalize(buf, canon, buflen, &ec);
             if (U_SUCCESS(ec)) {
                 result = UnicodeString(canon);
             }
         }
         uprv_free(buf);
         uprv_free(canon);
     }
     return result;
 #endif
 }
 Locale&
 LocaleUtility::initLocaleFromName(const UnicodeString& id, Locale& result)
 {
     enum { BUFLEN = 128 }; // larger than ever needed
     if (id.isBogus() || id.length() >= BUFLEN) {
         result.setToBogus();
     } else {
         /*
          * We need to convert from a UnicodeString to char * in order to
          * create a Locale.
          *
          * Problem: Locale ID strings may contain '@' which is a variant
          * character and cannot be handled by invariant-character conversion.
          *
          * Hack: Since ICU code can handle locale IDs with multiple encodings
          * of '@' (at least for EBCDIC; it's not known to be a problem for
          * ASCII-based systems),
          * we use regular invariant-character conversion for everything else
          * and manually convert U+0040 into a compiler-char-constant '@'.
          * While this compilation-time constant may not match the runtime
          * encoding of '@', it should be one of the encodings which ICU
          * recognizes.
          *
          * There should be only at most one '@' in a locale ID.
          */
         char buffer[BUFLEN];
         int32_t prev, i;
         prev = 0;
         for(;;) {
             i = id.indexOf((UChar)0x40, prev);
             if(i < 0) {
                 // no @ between prev and the rest of the string
                 id.extract(prev, INT32_MAX, buffer + prev, BUFLEN - prev, US_INV);
                 break; // done
             } else {
                 // normal invariant-character conversion for text between @s
                 id.extract(prev, i - prev, buffer + prev, BUFLEN - prev, US_INV);
                 // manually "convert" U+0040 at id[i] into '@' at buffer[i]
                 buffer[i] = '@';
                 prev = i + 1;
             }
         }
         result = Locale::createFromName(buffer);
     }
     return result;
 }
 UnicodeString&
 LocaleUtility::initNameFromLocale(const Locale& locale, UnicodeString& result)
 {
     if (locale.isBogus()) {
         result.setToBogus();
     } else {
         result.append(UnicodeString(locale.getName(), -1, US_INV));
     }
     return result;
 }
 const Hashtable*
 LocaleUtility::getAvailableLocaleNames(const UnicodeString& bundleID)
 {
     // LocaleUtility_cache is a hash-of-hashes.  The top-level keys
     // are path strings ('bundleID') passed to
     // ures_openAvailableLocales.  The top-level values are
     // second-level hashes.  The second-level keys are result strings
     // from ures_openAvailableLocales.  The second-level values are
     // garbage ((void*)1 or other random pointer).
     UErrorCode status = U_ZERO_ERROR;
     Hashtable* cache;
     umtx_lock(NULL);
     cache = LocaleUtility_cache;
     umtx_unlock(NULL);
     if (cache == NULL) {
         cache = new Hashtable(status);
         if (cache == NULL || U_FAILURE(status)) {
             return NULL; // catastrophic failure; e.g. out of memory
         }
         cache->setValueDeleter(uhash_deleteHashtable);
         Hashtable* h; // set this to final LocaleUtility_cache value
         umtx_lock(NULL);
         h = LocaleUtility_cache;
         if (h == NULL) {
             LocaleUtility_cache = h = cache;
             cache = NULL;
             ucln_common_registerCleanup(UCLN_COMMON_SERVICE, service_cleanup);
         }
         umtx_unlock(NULL);
         if(cache != NULL) {
           delete cache;
         }
         cache = h;
     }
     U_ASSERT(cache != NULL);
     Hashtable* htp;
     umtx_lock(NULL);
     htp = (Hashtable*) cache->get(bundleID);
     umtx_unlock(NULL);
     if (htp == NULL) {
         htp = new Hashtable(status);
         if (htp && U_SUCCESS(status)) {
             CharString cbundleID;
             cbundleID.appendInvariantChars(bundleID, status);
             const char* path = cbundleID.isEmpty() ? NULL : cbundleID.data();
             UEnumeration *uenum = ures_openAvailableLocales(path, &status);
             for (;;) {
                 const UChar* id = uenum_unext(uenum, NULL, &status);
                 if (id == NULL) {
                     break;
                 }
                 htp->put(UnicodeString(id), (void*)htp, status);
             }
             uenum_close(uenum);
             if (U_FAILURE(status)) {
                 delete htp;
                 return NULL;
             }
             umtx_lock(NULL);
             cache->put(bundleID, (void*)htp, status);
             umtx_unlock(NULL);
         }
     }
     return htp;
 }
 UBool
 LocaleUtility::isFallbackOf(const UnicodeString& root, const UnicodeString& child)
 {
     return child.indexOf(root) == 0 &&
       (child.length() == root.length() ||
        child.charAt(root.length()) == UNDERSCORE_CHAR);
 }
 U_NAMESPACE_END
 /* !UCONFIG_NO_SERVICE */
 #endif

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intl/icu/source/common/locutil.cpp@b8a032363ba2 (annotated)

intl/icu/source/common/locutil.cpp