michael@0: /*
michael@0: **********************************************************************
michael@0: *   Copyright (C) 2001-2011, International Business Machines
michael@0: *   Corporation and others.  All Rights Reserved.
michael@0: **********************************************************************
michael@0: *   Date        Name        Description
michael@0: *   06/06/01    aliu        Creation.
michael@0: **********************************************************************
michael@0: */
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: 
michael@0: #if !UCONFIG_NO_TRANSLITERATION
michael@0: 
michael@0: #include "unicode/unifilt.h"
michael@0: #include "unicode/uchar.h"
michael@0: #include "unicode/utf16.h"
michael@0: #include "uni2name.h"
michael@0: #include "cstring.h"
michael@0: #include "cmemory.h"
michael@0: #include "uprops.h"
michael@0: 
michael@0: U_NAMESPACE_BEGIN
michael@0: 
michael@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnicodeNameTransliterator)
michael@0: 
michael@0: static const UChar OPEN_DELIM[] = {92,78,123,0}; // "\N{"
michael@0: static const UChar CLOSE_DELIM  = 125; // "}"
michael@0: #define OPEN_DELIM_LEN 3
michael@0: 
michael@0: /**
michael@0:  * Constructs a transliterator.
michael@0:  */
michael@0: UnicodeNameTransliterator::UnicodeNameTransliterator(UnicodeFilter* adoptedFilter) :
michael@0:     Transliterator(UNICODE_STRING("Any-Name", 8), adoptedFilter) {
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Destructor.
michael@0:  */
michael@0: UnicodeNameTransliterator::~UnicodeNameTransliterator() {}
michael@0: 
michael@0: /**
michael@0:  * Copy constructor.
michael@0:  */
michael@0: UnicodeNameTransliterator::UnicodeNameTransliterator(const UnicodeNameTransliterator& o) :
michael@0:     Transliterator(o) {}
michael@0: 
michael@0: /**
michael@0:  * Assignment operator.
michael@0:  */
michael@0: /*UnicodeNameTransliterator& UnicodeNameTransliterator::operator=(
michael@0:                              const UnicodeNameTransliterator& o) {
michael@0:     Transliterator::operator=(o);
michael@0:     return *this;
michael@0: }*/
michael@0: 
michael@0: /**
michael@0:  * Transliterator API.
michael@0:  */
michael@0: Transliterator* UnicodeNameTransliterator::clone(void) const {
michael@0:     return new UnicodeNameTransliterator(*this);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Implements {@link Transliterator#handleTransliterate}.
michael@0:  * Ignore isIncremental since we don't need the context, and
michael@0:  * we work on codepoints.
michael@0:  */
michael@0: void UnicodeNameTransliterator::handleTransliterate(Replaceable& text, UTransPosition& offsets,
michael@0:                                                     UBool /*isIncremental*/) const {
michael@0:     // The failure mode, here and below, is to behave like Any-Null,
michael@0:     // if either there is no name data (max len == 0) or there is no
michael@0:     // memory (malloc() => NULL).
michael@0: 
michael@0:     int32_t maxLen = uprv_getMaxCharNameLength();
michael@0:     if (maxLen == 0) {
michael@0:         offsets.start = offsets.limit;
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     // Accomodate the longest possible name plus padding
michael@0:     char* buf = (char*) uprv_malloc(maxLen);
michael@0:     if (buf == NULL) {
michael@0:         offsets.start = offsets.limit;
michael@0:         return;
michael@0:     }
michael@0:     
michael@0:     int32_t cursor = offsets.start;
michael@0:     int32_t limit = offsets.limit;
michael@0: 
michael@0:     UnicodeString str(FALSE, OPEN_DELIM, OPEN_DELIM_LEN);
michael@0:     UErrorCode status;
michael@0:     int32_t len;
michael@0: 
michael@0:     while (cursor < limit) {
michael@0:         UChar32 c = text.char32At(cursor);
michael@0:         int32_t clen = U16_LENGTH(c);
michael@0:         status = U_ZERO_ERROR;
michael@0:         if ((len = u_charName(c, U_EXTENDED_CHAR_NAME, buf, maxLen, &status)) >0 && !U_FAILURE(status)) {
michael@0:             str.truncate(OPEN_DELIM_LEN);
michael@0:             str.append(UnicodeString(buf, len, US_INV)).append(CLOSE_DELIM);
michael@0:             text.handleReplaceBetween(cursor, cursor+clen, str);
michael@0:             len += OPEN_DELIM_LEN + 1; // adjust for delimiters
michael@0:             cursor += len; // advance cursor and adjust for new text
michael@0:             limit += len-clen; // change in length
michael@0:         } else {
michael@0:             cursor += clen;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     offsets.contextLimit += limit - offsets.limit;
michael@0:     offsets.limit = limit;
michael@0:     offsets.start = cursor;
michael@0: 
michael@0:     uprv_free(buf);
michael@0: }
michael@0: 
michael@0: U_NAMESPACE_END
michael@0: 
michael@0: #endif /* #if !UCONFIG_NO_TRANSLITERATION */