The Tor Browser: intl/icu/source/i18n/uni2name.cpp@fc2d59ddac77

     1 /*

     2 **********************************************************************

     3 *   Copyright (C) 2001-2011, International Business Machines

     4 *   Corporation and others.  All Rights Reserved.

     5 **********************************************************************

     6 *   Date        Name        Description

     7 *   06/06/01    aliu        Creation.

     8 **********************************************************************

     9 */

    11 #include "unicode/utypes.h"

    13 #if !UCONFIG_NO_TRANSLITERATION

    15 #include "unicode/unifilt.h"

    16 #include "unicode/uchar.h"

    17 #include "unicode/utf16.h"

    18 #include "uni2name.h"

    19 #include "cstring.h"

    20 #include "cmemory.h"

    21 #include "uprops.h"

    23 U_NAMESPACE_BEGIN

    25 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnicodeNameTransliterator)

    27 static const UChar OPEN_DELIM[] = {92,78,123,0}; // "\N{"

    28 static const UChar CLOSE_DELIM  = 125; // "}"

    29 #define OPEN_DELIM_LEN 3

    31 /**

    32  * Constructs a transliterator.

    33  */

    34 UnicodeNameTransliterator::UnicodeNameTransliterator(UnicodeFilter* adoptedFilter) :

    35     Transliterator(UNICODE_STRING("Any-Name", 8), adoptedFilter) {

    36 }

    38 /**

    39  * Destructor.

    40  */

    41 UnicodeNameTransliterator::~UnicodeNameTransliterator() {}

    43 /**

    44  * Copy constructor.

    45  */

    46 UnicodeNameTransliterator::UnicodeNameTransliterator(const UnicodeNameTransliterator& o) :

    47     Transliterator(o) {}

    49 /**

    50  * Assignment operator.

    51  */

    52 /*UnicodeNameTransliterator& UnicodeNameTransliterator::operator=(

    53                              const UnicodeNameTransliterator& o) {

    54     Transliterator::operator=(o);

    55     return *this;

    56 }*/

    58 /**

    59  * Transliterator API.

    60  */

    61 Transliterator* UnicodeNameTransliterator::clone(void) const {

    62     return new UnicodeNameTransliterator(*this);

    63 }

    65 /**

    66  * Implements {@link Transliterator#handleTransliterate}.

    67  * Ignore isIncremental since we don't need the context, and

    68  * we work on codepoints.

    69  */

    70 void UnicodeNameTransliterator::handleTransliterate(Replaceable& text, UTransPosition& offsets,

    71                                                     UBool /*isIncremental*/) const {

    72     // The failure mode, here and below, is to behave like Any-Null,

    73     // if either there is no name data (max len == 0) or there is no

    74     // memory (malloc() => NULL).

    76     int32_t maxLen = uprv_getMaxCharNameLength();

    77     if (maxLen == 0) {

    78         offsets.start = offsets.limit;

    79         return;

    80     }

    82     // Accomodate the longest possible name plus padding

    83     char* buf = (char*) uprv_malloc(maxLen);

    84     if (buf == NULL) {

    85         offsets.start = offsets.limit;

    86         return;

    87     }

    89     int32_t cursor = offsets.start;

    90     int32_t limit = offsets.limit;

    92     UnicodeString str(FALSE, OPEN_DELIM, OPEN_DELIM_LEN);

    93     UErrorCode status;

    94     int32_t len;

    96     while (cursor < limit) {

    97         UChar32 c = text.char32At(cursor);

    98         int32_t clen = U16_LENGTH(c);

    99         status = U_ZERO_ERROR;

   100         if ((len = u_charName(c, U_EXTENDED_CHAR_NAME, buf, maxLen, &status)) >0 && !U_FAILURE(status)) {

   101             str.truncate(OPEN_DELIM_LEN);

   102             str.append(UnicodeString(buf, len, US_INV)).append(CLOSE_DELIM);

   103             text.handleReplaceBetween(cursor, cursor+clen, str);

   104             len += OPEN_DELIM_LEN + 1; // adjust for delimiters

   105             cursor += len; // advance cursor and adjust for new text

   106             limit += len-clen; // change in length

   107         } else {

   108             cursor += clen;

   109         }

   110     }

   112     offsets.contextLimit += limit - offsets.limit;

   113     offsets.limit = limit;

   114     offsets.start = cursor;

   116     uprv_free(buf);

   117 }

   119 U_NAMESPACE_END

   121 #endif /* #if !UCONFIG_NO_TRANSLITERATION */

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