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Commit	Line	Data
	1	// © 2016 and later: Unicode, Inc. and others.
	2	// License & terms of use: http://www.unicode.org/copyright.html
	3	/*
	4	**********************************************************************
	5	* Copyright (C) 2001-2011, International Business Machines
	6	* Corporation and others. All Rights Reserved.
	7	**********************************************************************
	8	* Date Name Description
	9	* 06/06/01 aliu Creation.
	10	**********************************************************************
	11	*/
	12
	13	#include "unicode/utypes.h"
	14
	15	#if !UCONFIG_NO_TRANSLITERATION
	16
	17	#include "unicode/unifilt.h"
	18	#include "unicode/uchar.h"
	19	#include "unicode/utf16.h"
	20	#include "uni2name.h"
	21	#include "cstring.h"
	22	#include "cmemory.h"
	23	#include "uprops.h"
	24
	25	U_NAMESPACE_BEGIN
	26
	27	UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnicodeNameTransliterator)
	28
	29	static const UChar OPEN_DELIM[] = {92,78,123,0}; // "\N{"
	30	static const UChar CLOSE_DELIM = 125; // "}"
	31	#define OPEN_DELIM_LEN 3
	32
	33	/**
	34	* Constructs a transliterator.
	35	*/
	36	UnicodeNameTransliterator::UnicodeNameTransliterator(UnicodeFilter* adoptedFilter) :
	37	Transliterator(UNICODE_STRING("Any-Name", 8), adoptedFilter) {
	38	}
	39
	40	/**
	41	* Destructor.
	42	*/
	43	UnicodeNameTransliterator::~UnicodeNameTransliterator() {}
	44
	45	/**
	46	* Copy constructor.
	47	*/
	48	UnicodeNameTransliterator::UnicodeNameTransliterator(const UnicodeNameTransliterator& o) :
	49	Transliterator(o) {}
	50
	51	/**
	52	* Assignment operator.
	53	*/
	54	/*UnicodeNameTransliterator& UnicodeNameTransliterator::operator=(
	55	const UnicodeNameTransliterator& o) {
	56	Transliterator::operator=(o);
	57	return *this;
	58	}*/
	59
	60	/**
	61	* Transliterator API.
	62	*/
	63	Transliterator* UnicodeNameTransliterator::clone(void) const {
	64	return new UnicodeNameTransliterator(*this);
	65	}
	66
	67	/**
	68	* Implements {@link Transliterator#handleTransliterate}.
	69	* Ignore isIncremental since we don't need the context, and
	70	* we work on codepoints.
	71	*/
	72	void UnicodeNameTransliterator::handleTransliterate(Replaceable& text, UTransPosition& offsets,
	73	UBool /isIncremental/) const {
	74	// The failure mode, here and below, is to behave like Any-Null,
	75	// if either there is no name data (max len == 0) or there is no
	76	// memory (malloc() => NULL).
	77
	78	int32_t maxLen = uprv_getMaxCharNameLength();
	79	if (maxLen == 0) {
	80	offsets.start = offsets.limit;
	81	return;
	82	}
	83
	84	// Accomodate the longest possible name plus padding
	85	char* buf = (char*) uprv_malloc(maxLen);
	86	if (buf == NULL) {
	87	offsets.start = offsets.limit;
	88	return;
	89	}
	90
	91	int32_t cursor = offsets.start;
	92	int32_t limit = offsets.limit;
	93
	94	UnicodeString str(FALSE, OPEN_DELIM, OPEN_DELIM_LEN);
	95	UErrorCode status;
	96	int32_t len;
	97
	98	while (cursor < limit) {
	99	UChar32 c = text.char32At(cursor);
	100	int32_t clen = U16_LENGTH(c);
	101	status = U_ZERO_ERROR;
	102	if ((len = u_charName(c, U_EXTENDED_CHAR_NAME, buf, maxLen, &status)) >0 && !U_FAILURE(status)) {
	103	str.truncate(OPEN_DELIM_LEN);
	104	str.append(UnicodeString(buf, len, US_INV)).append(CLOSE_DELIM);
	105	text.handleReplaceBetween(cursor, cursor+clen, str);
	106	len += OPEN_DELIM_LEN + 1; // adjust for delimiters
	107	cursor += len; // advance cursor and adjust for new text
	108	limit += len-clen; // change in length
	109	} else {
	110	cursor += clen;
	111	}
	112	}
	113
	114	offsets.contextLimit += limit - offsets.limit;
	115	offsets.limit = limit;
	116	offsets.start = cursor;
	117
	118	uprv_free(buf);
	119	}
	120
	121	U_NAMESPACE_END
	122
	123	#endif /* #if !UCONFIG_NO_TRANSLITERATION */