The Tor Browser: intl/icu/source/i18n/uspoof.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/uspoof.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/uspoof.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 ***************************************************************************
 * Copyright (C) 2008-2013, International Business Machines Corporation
 * and others. All Rights Reserved.
 ***************************************************************************
 *   file name:  uspoof.cpp
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 2008Feb13
 *   created by: Andy Heninger
 *
 *   Unicode Spoof Detection
 */
 #include "unicode/utypes.h"
 #include "unicode/normalizer2.h"
 #include "unicode/uspoof.h"
 #include "unicode/ustring.h"
 #include "unicode/utf16.h"
 #include "cmemory.h"
 #include "cstring.h"
 #include "identifier_info.h"
 #include "mutex.h"
 #include "scriptset.h"
 #include "uassert.h"
 #include "ucln_in.h"
 #include "uspoof_impl.h"
 #include "umutex.h"
 #if !UCONFIG_NO_NORMALIZATION
 U_NAMESPACE_USE
 //
 // Static Objects used by the spoof impl, their thread safe initialization and their cleanup.
 //
 static UnicodeSet *gInclusionSet = NULL;
 static UnicodeSet *gRecommendedSet = NULL;
 static const Normalizer2 *gNfdNormalizer = NULL;
 static UMutex gInitMutex = U_MUTEX_INITIALIZER;
 static UBool U_CALLCONV
 uspoof_cleanup(void) {
     delete gInclusionSet;
     gInclusionSet = NULL;
     delete gRecommendedSet;
     gRecommendedSet = NULL;
     gNfdNormalizer = NULL;
     return TRUE;
 }
 static void initializeStatics() {
     Mutex m(&gInitMutex);
     UErrorCode status = U_ZERO_ERROR;
     if (gInclusionSet == NULL) {
         gInclusionSet = new UnicodeSet(UNICODE_STRING_SIMPLE("[\
             \\-.\\u00B7\\u05F3\\u05F4\\u0F0B\\u200C\\u200D\\u2019]"), status);
         gRecommendedSet = new UnicodeSet(UNICODE_STRING_SIMPLE("[\
             [0-z\\u00C0-\\u017E\\u01A0\\u01A1\\u01AF\\u01B0\\u01CD-\
             \\u01DC\\u01DE-\\u01E3\\u01E6-\\u01F5\\u01F8-\\u021B\\u021E\
             \\u021F\\u0226-\\u0233\\u02BB\\u02BC\\u02EC\\u0300-\\u0304\
             \\u0306-\\u030C\\u030F-\\u0311\\u0313\\u0314\\u031B\\u0323-\
             \\u0328\\u032D\\u032E\\u0330\\u0331\\u0335\\u0338\\u0339\
             \\u0342-\\u0345\\u037B-\\u03CE\\u03FC-\\u045F\\u048A-\\u0525\
             \\u0531-\\u0586\\u05D0-\\u05F2\\u0621-\\u063F\\u0641-\\u0655\
             \\u0660-\\u0669\\u0670-\\u068D\\u068F-\\u06D5\\u06E5\\u06E6\
             \\u06EE-\\u06FF\\u0750-\\u07B1\\u0901-\\u0939\\u093C-\\u094D\
             \\u0950\\u0960-\\u0972\\u0979-\\u0A4D\\u0A5C-\\u0A74\\u0A81-\
             \\u0B43\\u0B47-\\u0B61\\u0B66-\\u0C56\\u0C60\\u0C61\\u0C66-\
             \\u0CD6\\u0CE0-\\u0CEF\\u0D02-\\u0D28\\u0D2A-\\u0D39\\u0D3D-\
             \\u0D43\\u0D46-\\u0D4D\\u0D57-\\u0D61\\u0D66-\\u0D8E\\u0D91-\
             \\u0DA5\\u0DA7-\\u0DDE\\u0DF2\\u0E01-\\u0ED9\\u0F00\\u0F20-\
             \\u0F8B\\u0F90-\\u109D\\u10D0-\\u10F0\\u10F7-\\u10FA\\u1200-\
             \\u135A\\u135F\\u1380-\\u138F\\u1401-\\u167F\\u1780-\\u17A2\
             \\u17A5-\\u17A7\\u17A9-\\u17B3\\u17B6-\\u17CA\\u17D2\\u17D7-\
             \\u17DC\\u17E0-\\u17E9\\u1810-\\u18A8\\u18AA-\\u18F5\\u1E00-\
             \\u1E99\\u1F00-\\u1FFC\\u2D30-\\u2D65\\u2D80-\\u2DDE\\u3005-\
             \\u3007\\u3041-\\u31B7\\u3400-\\u9FCB\\uA000-\\uA48C\\uA67F\
             \\uA717-\\uA71F\\uA788\\uAA60-\\uAA7B\\uAC00-\\uD7A3\\uFA0E-\
             \\uFA29\\U00020000-\
             \\U0002B734]-[[:Cn:][:nfkcqc=n:][:XIDC=n:]]]"), status);
         gNfdNormalizer = Normalizer2::getNFDInstance(status);
     }
     ucln_i18n_registerCleanup(UCLN_I18N_SPOOF, uspoof_cleanup);
     return;
 }
 U_CAPI USpoofChecker * U_EXPORT2
 uspoof_open(UErrorCode *status) {
     if (U_FAILURE(*status)) {
         return NULL;
     }
     initializeStatics();
     SpoofImpl *si = new SpoofImpl(SpoofData::getDefault(*status), *status);
     if (U_FAILURE(*status)) {
         delete si;
         si = NULL;
     }
     return reinterpret_cast<USpoofChecker *>(si);
 }
 U_CAPI USpoofChecker * U_EXPORT2
 uspoof_openFromSerialized(const void *data, int32_t length, int32_t *pActualLength,
                           UErrorCode *status) {
     if (U_FAILURE(*status)) {
         return NULL;
     }
     initializeStatics();
     SpoofData *sd = new SpoofData(data, length, *status);
     SpoofImpl *si = new SpoofImpl(sd, *status);
     if (U_FAILURE(*status)) {
         delete sd;
         delete si;
         return NULL;
     }
     if (sd == NULL || si == NULL) {
         *status = U_MEMORY_ALLOCATION_ERROR;
         delete sd;
         delete si;
         return NULL;
     }
     if (pActualLength != NULL) {
         *pActualLength = sd->fRawData->fLength;
     }
     return reinterpret_cast<USpoofChecker *>(si);
 }
 U_CAPI USpoofChecker * U_EXPORT2
 uspoof_clone(const USpoofChecker *sc, UErrorCode *status) {
     const SpoofImpl *src = SpoofImpl::validateThis(sc, *status);
     if (src == NULL) {
         return NULL;
     }
     SpoofImpl *result = new SpoofImpl(*src, *status);   // copy constructor
     if (U_FAILURE(*status)) {
         delete result;
         result = NULL;
     }
     return reinterpret_cast<USpoofChecker *>(result);
 }
 U_CAPI void U_EXPORT2
 uspoof_close(USpoofChecker *sc) {
     UErrorCode status = U_ZERO_ERROR;
     SpoofImpl *This = SpoofImpl::validateThis(sc, status);
     delete This;
 }
 U_CAPI void U_EXPORT2
 uspoof_setChecks(USpoofChecker *sc, int32_t checks, UErrorCode *status) {
     SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return;
     }
     // Verify that the requested checks are all ones (bits) that
     //   are acceptable, known values.
     if (checks & ~USPOOF_ALL_CHECKS) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return;
     }
     This->fChecks = checks;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_getChecks(const USpoofChecker *sc, UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return 0;
     }
     return This->fChecks;
 }
 U_CAPI void U_EXPORT2
 uspoof_setRestrictionLevel(USpoofChecker *sc, URestrictionLevel restrictionLevel) {
     UErrorCode status = U_ZERO_ERROR;
     SpoofImpl *This = SpoofImpl::validateThis(sc, status);
     if (This != NULL) {
         This->fRestrictionLevel = restrictionLevel;
     }
 }
 U_CAPI URestrictionLevel U_EXPORT2
 uspoof_getRestrictionLevel(const USpoofChecker *sc) {
     UErrorCode status = U_ZERO_ERROR;
     const SpoofImpl *This = SpoofImpl::validateThis(sc, status);
     if (This == NULL) {
         return USPOOF_UNRESTRICTIVE;
     }
     return This->fRestrictionLevel;
 }
 U_CAPI void U_EXPORT2
 uspoof_setAllowedLocales(USpoofChecker *sc, const char *localesList, UErrorCode *status) {
     SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return;
     }
     This->setAllowedLocales(localesList, *status);
 }
 U_CAPI const char * U_EXPORT2
 uspoof_getAllowedLocales(USpoofChecker *sc, UErrorCode *status) {
     SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return NULL;
     }
     return This->getAllowedLocales(*status);
 }
 U_CAPI const USet * U_EXPORT2
 uspoof_getAllowedChars(const USpoofChecker *sc, UErrorCode *status) {
     const UnicodeSet *result = uspoof_getAllowedUnicodeSet(sc, status);
     return result->toUSet();
 }
 U_CAPI const UnicodeSet * U_EXPORT2
 uspoof_getAllowedUnicodeSet(const USpoofChecker *sc, UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return NULL;
     }
     return This->fAllowedCharsSet;
 }
 U_CAPI void U_EXPORT2
 uspoof_setAllowedChars(USpoofChecker *sc, const USet *chars, UErrorCode *status) {
     const UnicodeSet *set = UnicodeSet::fromUSet(chars);
     uspoof_setAllowedUnicodeSet(sc, set, status);
 }
 U_CAPI void U_EXPORT2
 uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) {
     SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return;
     }
     if (chars->isBogus()) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return;
     }
     UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone());
     if (clonedSet == NULL || clonedSet->isBogus()) {
         *status = U_MEMORY_ALLOCATION_ERROR;
         return;
     }
     clonedSet->freeze();
     delete This->fAllowedCharsSet;
     This->fAllowedCharsSet = clonedSet;
     This->fChecks |= USPOOF_CHAR_LIMIT;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_check(const USpoofChecker *sc,
              const UChar *id, int32_t length,
              int32_t *position,
              UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return 0;
     }
     if (length < -1) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     UnicodeString idStr((length == -1), id, length);  // Aliasing constructor.
     int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
     return result;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_checkUTF8(const USpoofChecker *sc,
                  const char *id, int32_t length,
                  int32_t *position,
                  UErrorCode *status) {
     if (U_FAILURE(*status)) {
         return 0;
     }
     UnicodeString idStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
     int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
     return result;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_areConfusable(const USpoofChecker *sc,
                      const UChar *id1, int32_t length1,
                      const UChar *id2, int32_t length2,
                      UErrorCode *status) {
     SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     if (length1 < -1 || length2 < -1) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     UnicodeString id1Str((length1==-1), id1, length1);  // Aliasing constructor
     UnicodeString id2Str((length2==-1), id2, length2);  // Aliasing constructor
     return uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_areConfusableUTF8(const USpoofChecker *sc,
                          const char *id1, int32_t length1,
                          const char *id2, int32_t length2,
                          UErrorCode *status) {
     SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     if (length1 < -1 || length2 < -1) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     UnicodeString id1Str = UnicodeString::fromUTF8(StringPiece(id1, length1>=0? length1 : uprv_strlen(id1)));
     UnicodeString id2Str = UnicodeString::fromUTF8(StringPiece(id2, length2>=0? length2 : uprv_strlen(id2)));
     int32_t results = uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
     return results;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_areConfusableUnicodeString(const USpoofChecker *sc,
                                   const icu::UnicodeString &id1,
                                   const icu::UnicodeString &id2,
                                   UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     //
     // See section 4 of UAX 39 for the algorithm for checking whether two strings are confusable,
     //   and for definitions of the types (single, whole, mixed-script) of confusables.
     // We only care about a few of the check flags.  Ignore the others.
     // If no tests relavant to this function have been specified, return an error.
     // TODO:  is this really the right thing to do?  It's probably an error on the caller's part,
     //        but logically we would just return 0 (no error).
     if ((This->fChecks & (USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE |
                           USPOOF_WHOLE_SCRIPT_CONFUSABLE)) == 0) {
         *status = U_INVALID_STATE_ERROR;
         return 0;
     }
     int32_t  flagsForSkeleton = This->fChecks & USPOOF_ANY_CASE;
     int32_t  result = 0;
     IdentifierInfo *identifierInfo = This->getIdentifierInfo(*status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     identifierInfo->setIdentifier(id1, *status);
     int32_t id1ScriptCount = identifierInfo->getScriptCount();
     identifierInfo->setIdentifier(id2, *status);
     int32_t id2ScriptCount = identifierInfo->getScriptCount();
     This->releaseIdentifierInfo(identifierInfo);
     identifierInfo = NULL;
     if (This->fChecks & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
         UnicodeString   id1Skeleton;
         UnicodeString   id2Skeleton;
         if (id1ScriptCount <= 1 && id2ScriptCount <= 1) {
             flagsForSkeleton |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
             uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
             uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
             if (id1Skeleton == id2Skeleton) {
                 result |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
             }
         }
     }
     if (result & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
          // If the two inputs are single script confusable they cannot also be
          // mixed or whole script confusable, according to the UAX39 definitions.
          // So we can skip those tests.
          return result;
     }
     // Two identifiers are whole script confusable if each is of a single script
     // and they are mixed script confusable.
     UBool possiblyWholeScriptConfusables =
         id1ScriptCount <= 1 && id2ScriptCount <= 1 && (This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE);
     //
     // Mixed Script Check
     //
     if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) || possiblyWholeScriptConfusables ) {
         // For getSkeleton(), resetting the USPOOF_SINGLE_SCRIPT_CONFUSABLE flag will get us
         // the mixed script table skeleton, which is what we want.
         // The Any Case / Lower Case bit in the skelton flags was set at the top of the function.
         UnicodeString id1Skeleton;
         UnicodeString id2Skeleton;
         flagsForSkeleton &= ~USPOOF_SINGLE_SCRIPT_CONFUSABLE;
         uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
         uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
         if (id1Skeleton == id2Skeleton) {
             result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
             if (possiblyWholeScriptConfusables) {
                 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
             }
         }
     }
     return result;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_checkUnicodeString(const USpoofChecker *sc,
                           const icu::UnicodeString &id,
                           int32_t *position,
                           UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         return 0;
     }
     int32_t result = 0;
     IdentifierInfo *identifierInfo = NULL;
     if ((This->fChecks) & (USPOOF_RESTRICTION_LEVEL | USPOOF_MIXED_NUMBERS)) {
         identifierInfo = This->getIdentifierInfo(*status);
         if (U_FAILURE(*status)) {
             goto cleanupAndReturn;
         }
         identifierInfo->setIdentifier(id, *status);
         identifierInfo->setIdentifierProfile(*This->fAllowedCharsSet);
     }
     if ((This->fChecks) & USPOOF_RESTRICTION_LEVEL) {
         URestrictionLevel idRestrictionLevel = identifierInfo->getRestrictionLevel(*status);
         if (idRestrictionLevel > This->fRestrictionLevel) {
             result |= USPOOF_RESTRICTION_LEVEL;
         }
         if (This->fChecks & USPOOF_AUX_INFO) {
             result |= idRestrictionLevel;
         }
     }
     if ((This->fChecks) & USPOOF_MIXED_NUMBERS) {
         const UnicodeSet *numerics = identifierInfo->getNumerics();
         if (numerics->size() > 1) {
             result |= USPOOF_MIXED_NUMBERS;
         }
         // TODO: ICU4J returns the UnicodeSet of the numerics found in the identifier.
         //       We have no easy way to do the same in C.
         // if (checkResult != null) {
         //     checkResult.numerics = numerics;
         // }
     }
     if (This->fChecks & (USPOOF_CHAR_LIMIT)) {
         int32_t i;
         UChar32 c;
         int32_t length = id.length();
         for (i=0; i<length ;) {
             c = id.char32At(i);
             i += U16_LENGTH(c);
             if (!This->fAllowedCharsSet->contains(c)) {
                 result |= USPOOF_CHAR_LIMIT;
                 break;
             }
         }
     }
     if (This->fChecks &
         (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE | USPOOF_INVISIBLE)) {
         // These are the checks that need to be done on NFD input
         UnicodeString nfdText;
         gNfdNormalizer->normalize(id, nfdText, *status);
         int32_t nfdLength = nfdText.length();
         if (This->fChecks & USPOOF_INVISIBLE) {
             // scan for more than one occurence of the same non-spacing mark
             // in a sequence of non-spacing marks.
             int32_t     i;
             UChar32     c;
             UChar32     firstNonspacingMark = 0;
             UBool       haveMultipleMarks = FALSE;
             UnicodeSet  marksSeenSoFar;   // Set of combining marks in a single combining sequence.
             for (i=0; i<nfdLength ;) {
                 c = nfdText.char32At(i);
                 i += U16_LENGTH(c);
                 if (u_charType(c) != U_NON_SPACING_MARK) {
                     firstNonspacingMark = 0;
                     if (haveMultipleMarks) {
                         marksSeenSoFar.clear();
                         haveMultipleMarks = FALSE;
                     }
                     continue;
                 }
                 if (firstNonspacingMark == 0) {
                     firstNonspacingMark = c;
                     continue;
                 }
                 if (!haveMultipleMarks) {
                     marksSeenSoFar.add(firstNonspacingMark);
                     haveMultipleMarks = TRUE;
                 }
                 if (marksSeenSoFar.contains(c)) {
                     // report the error, and stop scanning.
                     // No need to find more than the first failure.
                     result |= USPOOF_INVISIBLE;
                     break;
                 }
                 marksSeenSoFar.add(c);
             }
         }
         if (This->fChecks & (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE)) {
             // The basic test is the same for both whole and mixed script confusables.
             // Compute the set of scripts that every input character has a confusable in.
             // For this computation an input character is always considered to be
             // confusable with itself in its own script.
             //
             // If the number of such scripts is two or more, and the input consisted of
             // characters all from a single script, we have a whole script confusable.
             // (The two scripts will be the original script and the one that is confusable)
             //
             // If the number of such scripts >= one, and the original input contained characters from
             // more than one script, we have a mixed script confusable.  (We can transform
             // some of the characters, and end up with a visually similar string all in
             // one script.)
             if (identifierInfo == NULL) {
                 identifierInfo = This->getIdentifierInfo(*status);
                 if (U_FAILURE(*status)) {
                     goto cleanupAndReturn;
                 }
                 identifierInfo->setIdentifier(id, *status);
             }
             int32_t scriptCount = identifierInfo->getScriptCount();
             ScriptSet scripts;
             This->wholeScriptCheck(nfdText, &scripts, *status);
             int32_t confusableScriptCount = scripts.countMembers();
             //printf("confusableScriptCount = %d\n", confusableScriptCount);
             if ((This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE) &&
                 confusableScriptCount >= 2 &&
                 scriptCount == 1) {
                 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
             }
             if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) &&
                 confusableScriptCount >= 1 &&
                 scriptCount > 1) {
                 result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
             }
         }
     }
 cleanupAndReturn:
     This->releaseIdentifierInfo(identifierInfo);
     if (position != NULL) {
         *position = 0;
     }
     return result;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_getSkeleton(const USpoofChecker *sc,
                    uint32_t type,
                    const UChar *id,  int32_t length,
                    UChar *dest, int32_t destCapacity,
                    UErrorCode *status) {
     SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     UnicodeString idStr((length==-1), id, length);  // Aliasing constructor
     UnicodeString destStr;
     uspoof_getSkeletonUnicodeString(sc, type, idStr, destStr, status);
     destStr.extract(dest, destCapacity, *status);
     return destStr.length();
 }
 U_I18N_API UnicodeString &  U_EXPORT2
 uspoof_getSkeletonUnicodeString(const USpoofChecker *sc,
                                 uint32_t type,
                                 const UnicodeString &id,
                                 UnicodeString &dest,
                                 UErrorCode *status) {
     const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return dest;
     }
    int32_t tableMask = 0;
    switch (type) {
       case 0:
         tableMask = USPOOF_ML_TABLE_FLAG;
         break;
       case USPOOF_SINGLE_SCRIPT_CONFUSABLE:
         tableMask = USPOOF_SL_TABLE_FLAG;
         break;
       case USPOOF_ANY_CASE:
         tableMask = USPOOF_MA_TABLE_FLAG;
         break;
       case USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_ANY_CASE:
         tableMask = USPOOF_SA_TABLE_FLAG;
         break;
       default:
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return dest;
     }
     UnicodeString nfdId;
     gNfdNormalizer->normalize(id, nfdId, *status);
     // Apply the skeleton mapping to the NFD normalized input string
     // Accumulate the skeleton, possibly unnormalized, in a UnicodeString.
     int32_t inputIndex = 0;
     UnicodeString skelStr;
     int32_t normalizedLen = nfdId.length();
     for (inputIndex=0; inputIndex < normalizedLen; ) {
         UChar32 c = nfdId.char32At(inputIndex);
         inputIndex += U16_LENGTH(c);
         This->confusableLookup(c, tableMask, skelStr);
     }
     gNfdNormalizer->normalize(skelStr, dest, *status);
     return dest;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_getSkeletonUTF8(const USpoofChecker *sc,
                        uint32_t type,
                        const char *id,  int32_t length,
                        char *dest, int32_t destCapacity,
                        UErrorCode *status) {
     SpoofImpl::validateThis(sc, *status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
         *status = U_ILLEGAL_ARGUMENT_ERROR;
         return 0;
     }
     UnicodeString srcStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
     UnicodeString destStr;
     uspoof_getSkeletonUnicodeString(sc, type, srcStr, destStr, status);
     if (U_FAILURE(*status)) {
         return 0;
     }
     int32_t lengthInUTF8 = 0;
     u_strToUTF8(dest, destCapacity, &lengthInUTF8,
                 destStr.getBuffer(), destStr.length(), status);
     return lengthInUTF8;
 }
 U_CAPI int32_t U_EXPORT2
 uspoof_serialize(USpoofChecker *sc,void *buf, int32_t capacity, UErrorCode *status) {
     SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
     if (This == NULL) {
         U_ASSERT(U_FAILURE(*status));
         return 0;
     }
     int32_t dataSize = This->fSpoofData->fRawData->fLength;
     if (capacity < dataSize) {
         *status = U_BUFFER_OVERFLOW_ERROR;
         return dataSize;
     }
     uprv_memcpy(buf, This->fSpoofData->fRawData, dataSize);
     return dataSize;
 }
 U_CAPI const USet * U_EXPORT2
 uspoof_getInclusionSet(UErrorCode *) {
     initializeStatics();
     return gInclusionSet->toUSet();
 }
 U_CAPI const USet * U_EXPORT2
 uspoof_getRecommendedSet(UErrorCode *) {
     initializeStatics();
     return gRecommendedSet->toUSet();
 }
 U_I18N_API const UnicodeSet * U_EXPORT2
 uspoof_getInclusionUnicodeSet(UErrorCode *) {
     initializeStatics();
     return gInclusionSet;
 }
 U_I18N_API const UnicodeSet * U_EXPORT2
 uspoof_getRecommendedUnicodeSet(UErrorCode *) {
     initializeStatics();
     return gRecommendedSet;
 }
 #endif // !UCONFIG_NO_NORMALIZATION

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intl/icu/source/i18n/uspoof.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/uspoof.cpp