/*
**********************************************************************
* Copyright (c) 2002-2012, International Business Machines Corporation
* and others. All Rights Reserved.
**********************************************************************
* Date Name Description
* 01/14/2002 aliu Creation.
**********************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_TRANSLITERATION
#include "tridpars.h"
#include "hash.h"
#include "mutex.h"
#include "ucln_in.h"
#include "unicode/parsepos.h"
#include "unicode/translit.h"
#include "unicode/uchar.h"
#include "unicode/uniset.h"
#include "unicode/unistr.h"
#include "unicode/utrans.h"
#include "util.h"
#include "uvector.h"
U_NAMESPACE_BEGIN
static const UChar ID_DELIM = 0x003B; // ;
static const UChar TARGET_SEP = 0x002D; // -
static const UChar VARIANT_SEP = 0x002F; // /
static const UChar OPEN_REV = 0x0028; // (
static const UChar CLOSE_REV = 0x0029; // )
//static const UChar EMPTY[] = {0}; // ""
static const UChar ANY[] = {65,110,121,0}; // "Any"
static const UChar ANY_NULL[] = {65,110,121,45,78,117,108,108,0}; // "Any-Null"
static const int32_t FORWARD = UTRANS_FORWARD;
static const int32_t REVERSE = UTRANS_REVERSE;
static Hashtable* SPECIAL_INVERSES = NULL;
/**
* The mutex controlling access to SPECIAL_INVERSES
*/
static UMutex LOCK = U_MUTEX_INITIALIZER;
TransliteratorIDParser::Specs::Specs(const UnicodeString& s, const UnicodeString& t,
const UnicodeString& v, UBool sawS,
const UnicodeString& f) {
source = s;
target = t;
variant = v;
sawSource = sawS;
filter = f;
}
TransliteratorIDParser::SingleID::SingleID(const UnicodeString& c, const UnicodeString& b,
const UnicodeString& f) {
canonID = c;
basicID = b;
filter = f;
}
TransliteratorIDParser::SingleID::SingleID(const UnicodeString& c, const UnicodeString& b) {
canonID = c;
basicID = b;
}
Transliterator* TransliteratorIDParser::SingleID::createInstance() {
Transliterator* t;
if (basicID.length() == 0) {
t = createBasicInstance(UnicodeString(TRUE, ANY_NULL, 8), &canonID);
} else {
t = createBasicInstance(basicID, &canonID);
}
if (t != NULL) {
if (filter.length() != 0) {
UErrorCode ec = U_ZERO_ERROR;
UnicodeSet *set = new UnicodeSet(filter, ec);
if (U_FAILURE(ec)) {
delete set;
} else {
t->adoptFilter(set);
}
}
}
return t;
}
/**
* Parse a single ID, that is, an ID of the general form
* "[f1] s1-t1/v1 ([f2] s2-t3/v2)", with the parenthesized element
* optional, the filters optional, and the variants optional.
* @param id the id to be parsed
* @param pos INPUT-OUTPUT parameter. On input, the position of
* the first character to parse. On output, the position after
* the last character parsed.
* @param dir the direction. If the direction is REVERSE then the
* SingleID is constructed for the reverse direction.
* @return a SingleID object or NULL
*/
TransliteratorIDParser::SingleID*
TransliteratorIDParser::parseSingleID(const UnicodeString& id, int32_t& pos,
int32_t dir, UErrorCode& status) {
int32_t start = pos;
// The ID will be of the form A, A(), A(B), or (B), where
// A and B are filter IDs.
Specs* specsA = NULL;
Specs* specsB = NULL;
UBool sawParen = FALSE;
// On the first pass, look for (B) or (). If this fails, then
// on the second pass, look for A, A(B), or A().
for (int32_t pass=1; pass<=2; ++pass) {
if (pass == 2) {
specsA = parseFilterID(id, pos, TRUE);
if (specsA == NULL) {
pos = start;
return NULL;
}
}
if (ICU_Utility::parseChar(id, pos, OPEN_REV)) {
sawParen = TRUE;
if (!ICU_Utility::parseChar(id, pos, CLOSE_REV)) {
specsB = parseFilterID(id, pos, TRUE);
// Must close with a ')'
if (specsB == NULL || !ICU_Utility::parseChar(id, pos, CLOSE_REV)) {
delete specsA;
pos = start;
return NULL;
}
}
break;
}
}
// Assemble return results
SingleID* single;
if (sawParen) {
if (dir == FORWARD) {
SingleID* b = specsToID(specsB, FORWARD);
single = specsToID(specsA, FORWARD);
// Null pointers check
if (b == NULL || single == NULL) {
delete b;
delete single;
status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
single->canonID.append(OPEN_REV)
.append(b->canonID).append(CLOSE_REV);
if (specsA != NULL) {
single->filter = specsA->filter;
}
delete b;
} else {
SingleID* a = specsToID(specsA, FORWARD);
single = specsToID(specsB, FORWARD);
// Check for null pointer.
if (a == NULL || single == NULL) {
delete a;
delete single;
status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
single->canonID.append(OPEN_REV)
.append(a->canonID).append(CLOSE_REV);
if (specsB != NULL) {
single->filter = specsB->filter;
}
delete a;
}
} else {
// assert(specsA != NULL);
if (dir == FORWARD) {
single = specsToID(specsA, FORWARD);
} else {
single = specsToSpecialInverse(*specsA, status);
if (single == NULL) {
single = specsToID(specsA, REVERSE);
}
}
// Check for NULL pointer
if (single == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
single->filter = specsA->filter;
}
delete specsA;
delete specsB;
return single;
}
/**
* Parse a filter ID, that is, an ID of the general form
* "[f1] s1-t1/v1", with the filters optional, and the variants optional.
* @param id the id to be parsed
* @param pos INPUT-OUTPUT parameter. On input, the position of
* the first character to parse. On output, the position after
* the last character parsed.
* @return a SingleID object or null if the parse fails
*/
TransliteratorIDParser::SingleID*
TransliteratorIDParser::parseFilterID(const UnicodeString& id, int32_t& pos) {
int32_t start = pos;
Specs* specs = parseFilterID(id, pos, TRUE);
if (specs == NULL) {
pos = start;
return NULL;
}
// Assemble return results
SingleID* single = specsToID(specs, FORWARD);
if (single != NULL) {
single->filter = specs->filter;
}
delete specs;
return single;
}
/**
* Parse a global filter of the form "[f]" or "([f])", depending
* on 'withParens'.
* @param id the pattern the parse
* @param pos INPUT-OUTPUT parameter. On input, the position of
* the first character to parse. On output, the position after
* the last character parsed.
* @param dir the direction.
* @param withParens INPUT-OUTPUT parameter. On entry, if
* withParens is 0, then parens are disallowed. If it is 1,
* then parens are requires. If it is -1, then parens are
* optional, and the return result will be set to 0 or 1.
* @param canonID OUTPUT parameter. The pattern for the filter
* added to the canonID, either at the end, if dir is FORWARD, or
* at the start, if dir is REVERSE. The pattern will be enclosed
* in parentheses if appropriate, and will be suffixed with an
* ID_DELIM character. May be NULL.
* @return a UnicodeSet object or NULL. A non-NULL results
* indicates a successful parse, regardless of whether the filter
* applies to the given direction. The caller should discard it
* if withParens != (dir == REVERSE).
*/
UnicodeSet* TransliteratorIDParser::parseGlobalFilter(const UnicodeString& id, int32_t& pos,
int32_t dir,
int32_t& withParens,
UnicodeString* canonID) {
UnicodeSet* filter = NULL;
int32_t start = pos;
if (withParens == -1) {
withParens = ICU_Utility::parseChar(id, pos, OPEN_REV) ? 1 : 0;
} else if (withParens == 1) {
if (!ICU_Utility::parseChar(id, pos, OPEN_REV)) {
pos = start;
return NULL;
}
}
ICU_Utility::skipWhitespace(id, pos, TRUE);
if (UnicodeSet::resemblesPattern(id, pos)) {
ParsePosition ppos(pos);
UErrorCode ec = U_ZERO_ERROR;
filter = new UnicodeSet(id, ppos, USET_IGNORE_SPACE, NULL, ec);
/* test for NULL */
if (filter == 0) {
pos = start;
return 0;
}
if (U_FAILURE(ec)) {
delete filter;
pos = start;
return NULL;
}
UnicodeString pattern;
id.extractBetween(pos, ppos.getIndex(), pattern);
pos = ppos.getIndex();
if (withParens == 1 && !ICU_Utility::parseChar(id, pos, CLOSE_REV)) {
pos = start;
return NULL;
}
// In the forward direction, append the pattern to the
// canonID. In the reverse, insert it at zero, and invert
// the presence of parens ("A" <-> "(A)").
if (canonID != NULL) {
if (dir == FORWARD) {
if (withParens == 1) {
pattern.insert(0, OPEN_REV);
pattern.append(CLOSE_REV);
}
canonID->append(pattern).append(ID_DELIM);
} else {
if (withParens == 0) {
pattern.insert(0, OPEN_REV);
pattern.append(CLOSE_REV);
}
canonID->insert(0, pattern);
canonID->insert(pattern.length(), ID_DELIM);
}
}
}
return filter;
}
U_CDECL_BEGIN
static void U_CALLCONV _deleteSingleID(void* obj) {
delete (TransliteratorIDParser::SingleID*) obj;
}
static void U_CALLCONV _deleteTransliteratorTrIDPars(void* obj) {
delete (Transliterator*) obj;
}
U_CDECL_END
/**
* Parse a compound ID, consisting of an optional forward global
* filter, a separator, one or more single IDs delimited by
* separators, an an optional reverse global filter. The
* separator is a semicolon. The global filters are UnicodeSet
* patterns. The reverse global filter must be enclosed in
* parentheses.
* @param id the pattern the parse
* @param dir the direction.
* @param canonID OUTPUT parameter that receives the canonical ID,
* consisting of canonical IDs for all elements, as returned by
* parseSingleID(), separated by semicolons. Previous contents
* are discarded.
* @param list OUTPUT parameter that receives a list of SingleID
* objects representing the parsed IDs. Previous contents are
* discarded.
* @param globalFilter OUTPUT parameter that receives a pointer to
* a newly created global filter for this ID in this direction, or
* NULL if there is none.
* @return TRUE if the parse succeeds, that is, if the entire
* id is consumed without syntax error.
*/
UBool TransliteratorIDParser::parseCompoundID(const UnicodeString& id, int32_t dir,
UnicodeString& canonID,
UVector& list,
UnicodeSet*& globalFilter) {
UErrorCode ec = U_ZERO_ERROR;
int32_t i;
int32_t pos = 0;
int32_t withParens = 1;
list.removeAllElements();
UnicodeSet* filter;
globalFilter = NULL;
canonID.truncate(0);
// Parse leading global filter, if any
withParens = 0; // parens disallowed
filter = parseGlobalFilter(id, pos, dir, withParens, &canonID);
if (filter != NULL) {
if (!ICU_Utility::parseChar(id, pos, ID_DELIM)) {
// Not a global filter; backup and resume
canonID.truncate(0);
pos = 0;
}
if (dir == FORWARD) {
globalFilter = filter;
} else {
delete filter;
}
filter = NULL;
}
UBool sawDelimiter = TRUE;
for (;;) {
SingleID* single = parseSingleID(id, pos, dir, ec);
if (single == NULL) {
break;
}
if (dir == FORWARD) {
list.addElement(single, ec);
} else {
list.insertElementAt(single, 0, ec);
}
if (U_FAILURE(ec)) {
goto FAIL;
}
if (!ICU_Utility::parseChar(id, pos, ID_DELIM)) {
sawDelimiter = FALSE;
break;
}
}
if (list.size() == 0) {
goto FAIL;
}
// Construct canonical ID
for (i=0; i<list.size(); ++i) {
SingleID* single = (SingleID*) list.elementAt(i);
canonID.append(single->canonID);
if (i != (list.size()-1)) {
canonID.append(ID_DELIM);
}
}
// Parse trailing global filter, if any, and only if we saw
// a trailing delimiter after the IDs.
if (sawDelimiter) {
withParens = 1; // parens required
filter = parseGlobalFilter(id, pos, dir, withParens, &canonID);
if (filter != NULL) {
// Don't require trailing ';', but parse it if present
ICU_Utility::parseChar(id, pos, ID_DELIM);
if (dir == REVERSE) {
globalFilter = filter;
} else {
delete filter;
}
filter = NULL;
}
}
// Trailing unparsed text is a syntax error
ICU_Utility::skipWhitespace(id, pos, TRUE);
if (pos != id.length()) {
goto FAIL;
}
return TRUE;
FAIL:
UObjectDeleter *save = list.setDeleter(_deleteSingleID);
list.removeAllElements();
list.setDeleter(save);
delete globalFilter;
globalFilter = NULL;
return FALSE;
}
/**
* Convert the elements of the 'list' vector, which are SingleID
* objects, into actual Transliterator objects. In the course of
* this, some (or all) entries may be removed. If all entries
* are removed, the NULL transliterator will be added.
*
* Delete entries with empty basicIDs; these are generated by
* elements like "(A)" in the forward direction, or "A()" in
* the reverse. THIS MAY RESULT IN AN EMPTY VECTOR. Convert
* SingleID entries to actual transliterators.
*
* @param list vector of SingleID objects. On exit, vector
* of one or more Transliterators.
* @return new value of insertIndex. The index will shift if
* there are empty items, like "(Lower)", with indices less than
* insertIndex.
*/
void TransliteratorIDParser::instantiateList(UVector& list,
UErrorCode& ec) {
UVector tlist(ec);
if (U_FAILURE(ec)) {
goto RETURN;
}
tlist.setDeleter(_deleteTransliteratorTrIDPars);
Transliterator* t;
int32_t i;
for (i=0; i<=list.size(); ++i) { // [sic]: i<=list.size()
// We run the loop too long by one, so we can
// do an insert after the last element
if (i==list.size()) {
break;
}
SingleID* single = (SingleID*) list.elementAt(i);
if (single->basicID.length() != 0) {
t = single->createInstance();
if (t == NULL) {
ec = U_INVALID_ID;
goto RETURN;
}
tlist.addElement(t, ec);
if (U_FAILURE(ec)) {
delete t;
goto RETURN;
}
}
}
// An empty list is equivalent to a NULL transliterator.
if (tlist.size() == 0) {
t = createBasicInstance(UnicodeString(TRUE, ANY_NULL, 8), NULL);
if (t == NULL) {
// Should never happen
ec = U_INTERNAL_TRANSLITERATOR_ERROR;
}
tlist.addElement(t, ec);
if (U_FAILURE(ec)) {
delete t;
}
}
RETURN:
UObjectDeleter *save = list.setDeleter(_deleteSingleID);
list.removeAllElements();
if (U_SUCCESS(ec)) {
list.setDeleter(_deleteTransliteratorTrIDPars);
while (tlist.size() > 0) {
t = (Transliterator*) tlist.orphanElementAt(0);
list.addElement(t, ec);
if (U_FAILURE(ec)) {
delete t;
list.removeAllElements();
break;
}
}
}
list.setDeleter(save);
}
/**
* Parse an ID into pieces. Take IDs of the form T, T/V, S-T,
* S-T/V, or S/V-T. If the source is missing, return a source of
* ANY.
* @param id the id string, in any of several forms
* @return an array of 4 strings: source, target, variant, and
* isSourcePresent. If the source is not present, ANY will be
* given as the source, and isSourcePresent will be NULL. Otherwise
* isSourcePresent will be non-NULL. The target may be empty if the
* id is not well-formed. The variant may be empty.
*/
void TransliteratorIDParser::IDtoSTV(const UnicodeString& id,
UnicodeString& source,
UnicodeString& target,
UnicodeString& variant,
UBool& isSourcePresent) {
source.setTo(ANY, 3);
target.truncate(0);
variant.truncate(0);
int32_t sep = id.indexOf(TARGET_SEP);
int32_t var = id.indexOf(VARIANT_SEP);
if (var < 0) {
var = id.length();
}
isSourcePresent = FALSE;
if (sep < 0) {
// Form: T/V or T (or /V)
id.extractBetween(0, var, target);
id.extractBetween(var, id.length(), variant);
} else if (sep < var) {
// Form: S-T/V or S-T (or -T/V or -T)
if (sep > 0) {
id.extractBetween(0, sep, source);
isSourcePresent = TRUE;
}
id.extractBetween(++sep, var, target);
id.extractBetween(var, id.length(), variant);
} else {
// Form: (S/V-T or /V-T)
if (var > 0) {
id.extractBetween(0, var, source);
isSourcePresent = TRUE;
}
id.extractBetween(var, sep++, variant);
id.extractBetween(sep, id.length(), target);
}
if (variant.length() > 0) {
variant.remove(0, 1);
}
}
/**
* Given source, target, and variant strings, concatenate them into a
* full ID. If the source is empty, then "Any" will be used for the
* source, so the ID will always be of the form s-t/v or s-t.
*/
void TransliteratorIDParser::STVtoID(const UnicodeString& source,
const UnicodeString& target,
const UnicodeString& variant,
UnicodeString& id) {
id = source;
if (id.length() == 0) {
id.setTo(ANY, 3);
}
id.append(TARGET_SEP).append(target);
if (variant.length() != 0) {
id.append(VARIANT_SEP).append(variant);
}
// NUL-terminate the ID string for getTerminatedBuffer.
// This prevents valgrind and Purify warnings.
id.append((UChar)0);
id.truncate(id.length()-1);
}
/**
* Register two targets as being inverses of one another. For
* example, calling registerSpecialInverse("NFC", "NFD", TRUE) causes
* Transliterator to form the following inverse relationships:
*
* <pre>NFC => NFD
* Any-NFC => Any-NFD
* NFD => NFC
* Any-NFD => Any-NFC</pre>
*
* (Without the special inverse registration, the inverse of NFC
* would be NFC-Any.) Note that NFD is shorthand for Any-NFD, but
* that the presence or absence of "Any-" is preserved.
*
* <p>The relationship is symmetrical; registering (a, b) is
* equivalent to registering (b, a).
*
* <p>The relevant IDs must still be registered separately as
* factories or classes.
*
* <p>Only the targets are specified. Special inverses always
* have the form Any-Target1 <=> Any-Target2. The target should
* have canonical casing (the casing desired to be produced when
* an inverse is formed) and should contain no whitespace or other
* extraneous characters.
*
* @param target the target against which to register the inverse
* @param inverseTarget the inverse of target, that is
* Any-target.getInverse() => Any-inverseTarget
* @param bidirectional if TRUE, register the reverse relation
* as well, that is, Any-inverseTarget.getInverse() => Any-target
*/
void TransliteratorIDParser::registerSpecialInverse(const UnicodeString& target,
const UnicodeString& inverseTarget,
UBool bidirectional,
UErrorCode &status) {
init(status);
if (U_FAILURE(status)) {
return;
}
// If target == inverseTarget then force bidirectional => FALSE
if (bidirectional && 0==target.caseCompare(inverseTarget, U_FOLD_CASE_DEFAULT)) {
bidirectional = FALSE;
}
Mutex lock(&LOCK);
UnicodeString *tempus = new UnicodeString(inverseTarget); // Used for null pointer check before usage.
if (tempus == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
SPECIAL_INVERSES->put(target, tempus, status);
if (bidirectional) {
tempus = new UnicodeString(target);
if (tempus == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
SPECIAL_INVERSES->put(inverseTarget, tempus, status);
}
}
//----------------------------------------------------------------
// Private implementation
//----------------------------------------------------------------
/**
* Parse an ID into component pieces. Take IDs of the form T,
* T/V, S-T, S-T/V, or S/V-T. If the source is missing, return a
* source of ANY.
* @param id the id string, in any of several forms
* @param pos INPUT-OUTPUT parameter. On input, pos is the
* offset of the first character to parse in id. On output,
* pos is the offset after the last parsed character. If the
* parse failed, pos will be unchanged.
* @param allowFilter2 if TRUE, a UnicodeSet pattern is allowed
* at any location between specs or delimiters, and is returned
* as the fifth string in the array.
* @return a Specs object, or NULL if the parse failed. If
* neither source nor target was seen in the parsed id, then the
* parse fails. If allowFilter is TRUE, then the parsed filter
* pattern is returned in the Specs object, otherwise the returned
* filter reference is NULL. If the parse fails for any reason
* NULL is returned.
*/
TransliteratorIDParser::Specs*
TransliteratorIDParser::parseFilterID(const UnicodeString& id, int32_t& pos,
UBool allowFilter) {
UnicodeString first;
UnicodeString source;
UnicodeString target;
UnicodeString variant;
UnicodeString filter;
UChar delimiter = 0;
int32_t specCount = 0;
int32_t start = pos;
// This loop parses one of the following things with each
// pass: a filter, a delimiter character (either '-' or '/'),
// or a spec (source, target, or variant).
for (;;) {
ICU_Utility::skipWhitespace(id, pos, TRUE);
if (pos == id.length()) {
break;
}
// Parse filters
if (allowFilter && filter.length() == 0 &&
UnicodeSet::resemblesPattern(id, pos)) {
ParsePosition ppos(pos);
UErrorCode ec = U_ZERO_ERROR;
UnicodeSet set(id, ppos, USET_IGNORE_SPACE, NULL, ec);
if (U_FAILURE(ec)) {
pos = start;
return NULL;
}
id.extractBetween(pos, ppos.getIndex(), filter);
pos = ppos.getIndex();
continue;
}
if (delimiter == 0) {
UChar c = id.charAt(pos);
if ((c == TARGET_SEP && target.length() == 0) ||
(c == VARIANT_SEP && variant.length() == 0)) {
delimiter = c;
++pos;
continue;
}
}
// We are about to try to parse a spec with no delimiter
// when we can no longer do so (we can only do so at the
// start); break.
if (delimiter == 0 && specCount > 0) {
break;
}
UnicodeString spec = ICU_Utility::parseUnicodeIdentifier(id, pos);
if (spec.length() == 0) {
// Note that if there was a trailing delimiter, we
// consume it. So Foo-, Foo/, Foo-Bar/, and Foo/Bar-
// are legal.
break;
}
switch (delimiter) {
case 0:
first = spec;
break;
case TARGET_SEP:
target = spec;
break;
case VARIANT_SEP:
variant = spec;
break;
}
++specCount;
delimiter = 0;
}
// A spec with no prior character is either source or target,
// depending on whether an explicit "-target" was seen.
if (first.length() != 0) {
if (target.length() == 0) {
target = first;
} else {
source = first;
}
}
// Must have either source or target
if (source.length() == 0 && target.length() == 0) {
pos = start;
return NULL;
}
// Empty source or target defaults to ANY
UBool sawSource = TRUE;
if (source.length() == 0) {
source.setTo(ANY, 3);
sawSource = FALSE;
}
if (target.length() == 0) {
target.setTo(ANY, 3);
}
return new Specs(source, target, variant, sawSource, filter);
}
/**
* Givens a Spec object, convert it to a SingleID object. The
* Spec object is a more unprocessed parse result. The SingleID
* object contains information about canonical and basic IDs.
* @return a SingleID; never returns NULL. Returned object always
* has 'filter' field of NULL.
*/
TransliteratorIDParser::SingleID*
TransliteratorIDParser::specsToID(const Specs* specs, int32_t dir) {
UnicodeString canonID;
UnicodeString basicID;
UnicodeString basicPrefix;
if (specs != NULL) {
UnicodeString buf;
if (dir == FORWARD) {
if (specs->sawSource) {
buf.append(specs->source).append(TARGET_SEP);
} else {
basicPrefix = specs->source;
basicPrefix.append(TARGET_SEP);
}
buf.append(specs->target);
} else {
buf.append(specs->target).append(TARGET_SEP).append(specs->source);
}
if (specs->variant.length() != 0) {
buf.append(VARIANT_SEP).append(specs->variant);
}
basicID = basicPrefix;
basicID.append(buf);
if (specs->filter.length() != 0) {
buf.insert(0, specs->filter);
}
canonID = buf;
}
return new SingleID(canonID, basicID);
}
/**
* Given a Specs object, return a SingleID representing the
* special inverse of that ID. If there is no special inverse
* then return NULL.
* @return a SingleID or NULL. Returned object always has
* 'filter' field of NULL.
*/
TransliteratorIDParser::SingleID*
TransliteratorIDParser::specsToSpecialInverse(const Specs& specs, UErrorCode &status) {
if (0!=specs.source.caseCompare(ANY, 3, U_FOLD_CASE_DEFAULT)) {
return NULL;
}
init(status);
UnicodeString* inverseTarget;
umtx_lock(&LOCK);
inverseTarget = (UnicodeString*) SPECIAL_INVERSES->get(specs.target);
umtx_unlock(&LOCK);
if (inverseTarget != NULL) {
// If the original ID contained "Any-" then make the
// special inverse "Any-Foo"; otherwise make it "Foo".
// So "Any-NFC" => "Any-NFD" but "NFC" => "NFD".
UnicodeString buf;
if (specs.filter.length() != 0) {
buf.append(specs.filter);
}
if (specs.sawSource) {
buf.append(ANY, 3).append(TARGET_SEP);
}
buf.append(*inverseTarget);
UnicodeString basicID(TRUE, ANY, 3);
basicID.append(TARGET_SEP).append(*inverseTarget);
if (specs.variant.length() != 0) {
buf.append(VARIANT_SEP).append(specs.variant);
basicID.append(VARIANT_SEP).append(specs.variant);
}
return new SingleID(buf, basicID);
}
return NULL;
}
/**
* Glue method to get around access problems in C++. This would
* ideally be inline but we want to avoid a circular header
* dependency.
*/
Transliterator* TransliteratorIDParser::createBasicInstance(const UnicodeString& id, const UnicodeString* canonID) {
return Transliterator::createBasicInstance(id, canonID);
}
/**
* Initialize static memory.
*/
void TransliteratorIDParser::init(UErrorCode &status) {
if (SPECIAL_INVERSES != NULL) {
return;
}
Hashtable* special_inverses = new Hashtable(TRUE, status);
// Null pointer check
if (special_inverses == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
return;
}
special_inverses->setValueDeleter(uprv_deleteUObject);
umtx_lock(&LOCK);
if (SPECIAL_INVERSES == NULL) {
SPECIAL_INVERSES = special_inverses;
special_inverses = NULL;
}
umtx_unlock(&LOCK);
delete special_inverses; /*null instance*/
ucln_i18n_registerCleanup(UCLN_I18N_TRANSLITERATOR, utrans_transliterator_cleanup);
}
/**
* Free static memory.
*/
void TransliteratorIDParser::cleanup() {
if (SPECIAL_INVERSES) {
delete SPECIAL_INVERSES;
SPECIAL_INVERSES = NULL;
}
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_TRANSLITERATION */
//eof