The Tor Browser: intl/icu/source/i18n/unesctrn.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/unesctrn.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/unesctrn.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) 2001-2011, International Business Machines
  *   Corporation and others.  All Rights Reserved.
  **********************************************************************
  *   Date        Name        Description
  *   11/19/2001  aliu        Creation.
  **********************************************************************
  */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_TRANSLITERATION
 #include "unicode/uchar.h"
 #include "unicode/utf16.h"
 #include "unesctrn.h"
 #include "util.h"
 #include "cmemory.h"
 U_NAMESPACE_BEGIN
 /**
  * Special character marking the end of the spec[] array.
  */
 static const UChar END = 0xFFFF;
 // Unicode: "U+10FFFF" hex, min=4, max=6
 static const UChar SPEC_Unicode[] = {
 , 0, 16, 4, 6, 85/*U*/, 43/*+*/,
     END
 };
 // Java: "\\uFFFF" hex, min=4, max=4
 static const UChar SPEC_Java[] = {
 , 0, 16, 4, 4, 92/*\*/, 117/*u*/,
     END
 };
 // C: "\\uFFFF" hex, min=4, max=4; \\U0010FFFF hex, min=8, max=8
 static const UChar SPEC_C[] = {
 , 0, 16, 4, 4, 92/*\*/, 117/*u*/,
 , 0, 16, 8, 8, 92/*\*/, 85/*U*/,
     END
 };
 // XML: "&#x10FFFF;" hex, min=1, max=6
 static const UChar SPEC_XML[] = {
 , 1, 16, 1, 6, 38/*&*/, 35/*#*/, 120/*x*/, 59/*;*/,
     END
 };
 // XML10: "&#1114111;" dec, min=1, max=7 (not really "Hex-Any")
 static const UChar SPEC_XML10[] = {
 , 1, 10, 1, 7, 38/*&*/, 35/*#*/, 59/*;*/,
     END
 };
 // Perl: "\\x{263A}" hex, min=1, max=6
 static const UChar SPEC_Perl[] = {
 , 1, 16, 1, 6, 92/*\*/, 120/*x*/, 123/*{*/, 125/*}*/,
     END
 };
 // All: Java, C, Perl, XML, XML10, Unicode
 static const UChar SPEC_Any[] = {
 , 0, 16, 4, 6, 85/*U*/, 43/*+*/,                      // Unicode
 , 0, 16, 4, 4, 92/*\*/, 117/*u*/,                     // Java
 , 0, 16, 8, 8, 92/*\*/, 85/*U*/,                      // C (surrogates)
 , 1, 16, 1, 6, 38/*&*/, 35/*#*/, 120/*x*/, 59/*;*/,   // XML
 , 1, 10, 1, 7, 38/*&*/, 35/*#*/, 59/*;*/,             // XML10
 , 1, 16, 1, 6, 92/*\*/, 120/*x*/, 123/*{*/, 125/*}*/, // Perl
     END
 };
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnescapeTransliterator)
 static UChar* copySpec(const UChar* spec) {
     int32_t len = 0;
     while (spec[len] != END) {
         ++len;
     }
     ++len;
     UChar *result = (UChar *)uprv_malloc(len*sizeof(UChar));
     // Check for memory allocation error.
     if (result != NULL) {
     	uprv_memcpy(result, spec, len*sizeof(result[0]));
     }
     return result;
 }
 /**
  * Factory methods.  Ignore the context.
  */
 static Transliterator* _createUnicode(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_Unicode);
 }
 static Transliterator* _createJava(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_Java);
 }
 static Transliterator* _createC(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_C);
 }
 static Transliterator* _createXML(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_XML);
 }
 static Transliterator* _createXML10(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_XML10);
 }
 static Transliterator* _createPerl(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_Perl);
 }
 static Transliterator* _createAny(const UnicodeString& ID, Transliterator::Token /*context*/) {
     return new UnescapeTransliterator(ID, SPEC_Any);
 }
 /**
  * Registers standard variants with the system.  Called by
  * Transliterator during initialization.
  */
 void UnescapeTransliterator::registerIDs() {
     Token t = integerToken(0);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/Unicode"), _createUnicode, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/Java"), _createJava, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/C"), _createC, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/XML"), _createXML, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/XML10"), _createXML10, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any/Perl"), _createPerl, t);
     Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Hex-Any"), _createAny, t);
 }
 /**
  * Constructor.  Takes the encoded spec array.
  */
 UnescapeTransliterator::UnescapeTransliterator(const UnicodeString& newID,
                                                const UChar *newSpec) :
     Transliterator(newID, NULL)
 {
     this->spec = copySpec(newSpec);
 }
 /**
  * Copy constructor.
  */
 UnescapeTransliterator::UnescapeTransliterator(const UnescapeTransliterator& o) :
     Transliterator(o) {
     this->spec = copySpec(o.spec);
 }
 UnescapeTransliterator::~UnescapeTransliterator() {
     uprv_free(spec);
 }
 /**
  * Transliterator API.
  */
 Transliterator* UnescapeTransliterator::clone() const {
     return new UnescapeTransliterator(*this);
 }
 /**
  * Implements {@link Transliterator#handleTransliterate}.
  */
 void UnescapeTransliterator::handleTransliterate(Replaceable& text, UTransPosition& pos,
                                                  UBool isIncremental) const {
     int32_t start = pos.start;
     int32_t limit = pos.limit;
     int32_t i, j, ipat;
     while (start < limit) {
         // Loop over the forms in spec[].  Exit this loop when we
         // match one of the specs.  Exit the outer loop if a
         // partial match is detected and isIncremental is true.
         for (j=0, ipat=0; spec[ipat] != END; ++j) {
             // Read the header
             int32_t prefixLen = spec[ipat++];
             int32_t suffixLen = spec[ipat++];
             int8_t  radix     = (int8_t) spec[ipat++];
             int32_t minDigits = spec[ipat++];
             int32_t maxDigits = spec[ipat++];
             // s is a copy of start that is advanced over the
             // characters as we parse them.
             int32_t s = start;
             UBool match = TRUE;
             for (i=0; i<prefixLen; ++i) {
                 if (s >= limit) {
                     if (i > 0) {
                         // We've already matched a character.  This is
                         // a partial match, so we return if in
                         // incremental mode.  In non-incremental mode,
                         // go to the next spec.
                         if (isIncremental) {
                             goto exit;
                         }
                         match = FALSE;
                         break;
                     }
                 }
                 UChar c = text.charAt(s++);
                 if (c != spec[ipat + i]) {
                     match = FALSE;
                     break;
                 }
             }
             if (match) {
                 UChar32 u = 0;
                 int32_t digitCount = 0;
                 for (;;) {
                     if (s >= limit) {
                         // Check for partial match in incremental mode.
                         if (s > start && isIncremental) {
                             goto exit;
                         }
                         break;
                     }
                     UChar32 ch = text.char32At(s);
                     int32_t digit = u_digit(ch, radix);
                     if (digit < 0) {
                         break;
                     }
                     s += U16_LENGTH(ch);
                     u = (u * radix) + digit;
                     if (++digitCount == maxDigits) {
                         break;
                     }
                 }
                 match = (digitCount >= minDigits);
                 if (match) {
                     for (i=0; i<suffixLen; ++i) {
                         if (s >= limit) {
                             // Check for partial match in incremental mode.
                             if (s > start && isIncremental) {
                                 goto exit;
                             }
                             match = FALSE;
                             break;
                         }
                         UChar c = text.charAt(s++);
                         if (c != spec[ipat + prefixLen + i]) {
                             match = FALSE;
                             break;
                         }
                     }
                     if (match) {
                         // At this point, we have a match
                         UnicodeString str(u);
                         text.handleReplaceBetween(start, s, str);
                         limit -= s - start - str.length();
                         // The following break statement leaves the
                         // loop that is traversing the forms in
                         // spec[].  We then parse the next input
                         // character.
                         break;
                     }
                 }
             }
             ipat += prefixLen + suffixLen;
         }
         if (start < limit) {
             start += U16_LENGTH(text.char32At(start));
         }
     }
   exit:
     pos.contextLimit += limit - pos.limit;
     pos.limit = limit;
     pos.start = start;
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
 //eof

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intl/icu/source/i18n/unesctrn.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/unesctrn.cpp