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ICU-1491 rewrite parseID to handle all ID form variants; move Mark's code into parseID; enable special inverses (NFC/NFC, etc.)

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X-SVN-Rev: 6935
This commit is contained in:
Alan Liu 2001-11-15 23:40:02 +00:00
parent fdd3dc6fd0
commit 59fa6939a1
5 changed files with 186 additions and 42 deletions
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4
icu4c/source/i18n/nortrans.cpp
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@ -120,6 +120,10 @@ void NormalizationTransliterator::registerIDs() {
_create, integerToken(UNORM_NFD));
Transliterator::_registerFactory(UnicodeString("Any-NFKD", ""),
_create, integerToken(UNORM_NFKD));
Transliterator::_registerSpecialInverses(UnicodeString("NFC", ""),
UnicodeString("NFD", ""));
Transliterator::_registerSpecialInverses(UnicodeString("NFKC", ""),
UnicodeString("NFKD", ""));
}
/**

127
icu4c/source/i18n/translit.cpp
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@ -46,6 +46,8 @@ static const UChar VARIANT_SEP = 0x002F; // '/'
static const UChar OPEN_PAREN = 40;
static const UChar CLOSE_PAREN = 41;
static const UChar ANY[] = { 65, 110, 121, 0 }; // Any
/**
* Prefix for resource bundle key for the display name for a
* transliterator. The ID is appended to this to form the key.
@ -77,7 +79,7 @@ static const char RB_DISPLAY_NAME_PATTERN[] = "TransliteratorNamePattern";
static const char RB_RULE_BASED_IDS[] = "RuleBasedTransliteratorIDs";
/**
* The mutex controlling access to registry object.
* The mutex controlling access to registry object and specialInverses.
*/
static UMTX registryMutex = 0;
@ -89,6 +91,8 @@ static TransliteratorRegistry* registry = 0;
// Empty string
static const UChar EMPTY[] = {0}; //""
static Hashtable *specialInverses = 0;
U_NAMESPACE_BEGIN
/**
@ -1104,7 +1108,6 @@ Transliterator* Transliterator::parseID(const UnicodeString& ID,
}
Transliterator* t = NULL;
int32_t sep = 0; // index of the separator ('-') in id
// If id is empty, then we have either an empty specifier,
// which is illegal, or a compound filter, which is legal
@ -1124,39 +1127,67 @@ Transliterator* Transliterator::parseID(const UnicodeString& ID,
}
else {
// Fix the id, if necessary, by reversing it (A-B => B-A). This
// is only done if the id is NOT of the form Foo(Bar). Record the
// position of the separator.
//
// For both A-B and Foo(Bar) ids, detect the special case of Null,
// whose inverse is itself. Given an ID with no separator "Foo",
// an abbreviation for "Any-Foo", consider the inverse to be
// "Foo-Any".
sep = id.indexOf(ID_SEP);
if (sep < 0 && id.caseCompare(NullTransliterator::SHORT_ID,
U_FOLD_CASE_DEFAULT) == 0) {
// Handle "Null"
sep = id.length();
} else if (dir == UTRANS_REVERSE &&
id.caseCompare(NullTransliterator::ID,
U_FOLD_CASE_DEFAULT) == 0) {
// Reverse of "Any-Null" => "Null"
id.removeBetween(0, sep+1);
sep = id.length();
} else if (dir == UTRANS_REVERSE && revStart < 0) {
if (sep >= 0) {
id.extractBetween(0, sep, str);
id.removeBetween(0, sep+1);
} else {
str = UnicodeString("Any", "");
// Normalize the ID. Take IDs of the form T, T/V, S-T, S-T/V, or S/V-T
// and produce S-T/V. If the ID needs to be reversed, do so. This
// produces T-S/V, with a default S of "Any". If the ID has a special
// non-canonical inverse, look it up (e.g., NFC -> NFD, Null -> Null).
if (id.length() > 0) { // We handle empty IDs below
UnicodeString source(ANY);
UnicodeString target;
UnicodeString variant; // Variant INCLUDING "/"
int32_t sep = id.indexOf(ID_SEP);
int32_t var = id.indexOf(VARIANT_SEP);
if (var < 0) {
var = id.length();
}
if (sep < 0) {
// Form: T/V or T (or /V)
id.extractBetween(0, var, target);
id.extractBetween(var, 0x7FFFFFFF, variant);
} else if (sep < var) {
// Form: S-T/V or S-T
id.extractBetween(0, sep++, source);
id.extractBetween(sep, var, target);
id.extractBetween(var, 0x7FFFFFFF, variant);
} else {
// Form: S/V-T
id.extractBetween(0, var, source);
id.extractBetween(var, sep++, variant);
id.extractBetween(sep, 0x7FFFFFFF, target);
}
id.truncate(0);
// For forward IDs *or IDs that were part of a Foo(Bar) ID*,
// normalize them to canonical form.
if (dir == UTRANS_FORWARD || revStart >= 0) {
id.append(source).append(ID_SEP).append(target);
} else {
// Handle special, non-canonical inverse mappings,
// e.g. inverse(Any-NFC) = Any-NFD and vice versa.
if (source == ANY) {
UnicodeString* inverseTarget = (UnicodeString*) specialInverses->get(target);
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".
if (sep < 0) {
id.append(*inverseTarget);
} else {
source = *inverseTarget;
target = ANY;
}
}
}
if (id.length() == 0) {
id.append(target).append(ID_SEP).append(source);
}
}
// If the variant is empty ("/") then don't append it
if (variant.length() > 1) {
id.append(variant);
}
sep = id.length();
id.append(ID_SEP).append(str);
} else if (sep < 0 && id.length() > 0) {
// Don't do anything for empty IDs -- we handle these specially below
str = UnicodeString("Any-", "");
sep = str.length() - 1;
id.insert(0, str);
}
// If we have a reverse part of the ID, e.g., Foo(Bar), then we
@ -1230,7 +1261,7 @@ Transliterator* Transliterator::parseID(const UnicodeString& ID,
ID.extractBetween(revStart+1, revLimit, id);
}
} else if (revStart < 0) {
id.insert(sep, ID, setStart, setLimit-setStart);
id.insert(0, ID, setStart, setLimit-setStart);
} else {
// Change Foo(Bar) to Bar(Foo)
ID.extractBetween(pos, revStart, str);
@ -1375,6 +1406,27 @@ void Transliterator::_registerFactory(const UnicodeString& id,
registry->put(id, factory, context, TRUE);
}
// For public consumption
void Transliterator::registerSpecialInverses(const UnicodeString& target1,
const UnicodeString& target2) {
if (registry == 0) {
initializeRegistry();
}
Mutex lock(&registryMutex);
_registerSpecialInverses(target1, target2);
}
// To be called only by Transliterator subclasses that are called
// to register themselves by initializeRegistry().
void Transliterator::_registerSpecialInverses(const UnicodeString& target1,
const UnicodeString& target2) {
UErrorCode ec = U_ZERO_ERROR;
specialInverses->put(target1, new UnicodeString(target2), ec);
if (0 != target1.caseCompare(target2, U_FOLD_CASE_DEFAULT)) {
specialInverses->put(target2, new UnicodeString(target1), ec);
}
}
/**
* Registers a instance <tt>obj</tt> of a subclass of
* <code>Transliterator</code> with the system. This object must
@ -1596,6 +1648,11 @@ void Transliterator::initializeRegistry(void) {
ures_close(transIDs);
ures_close(bundle);
specialInverses = new Hashtable(TRUE);
specialInverses->setValueDeleter(uhash_deleteUnicodeString);
_registerSpecialInverses(NullTransliterator::SHORT_ID,
NullTransliterator::SHORT_ID);
// Manually add prototypes that the system knows about to the
// cache. This is how new non-rule-based transliterators are
// added to the system.

32
icu4c/source/i18n/unicode/translit.h
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@ -816,6 +816,35 @@ public:
*/
static void registerInstance(Transliterator* adoptedObj);
/**
* Register two targets as being inverses of one another. For
* example, calling registerSpecialInverses("NFC", "NFD") 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.
*/
static void registerSpecialInverses(const UnicodeString& target1,
const UnicodeString& target2);
private:
friend class NormalizationTransliterator;
@ -824,6 +853,9 @@ private:
Factory factory,
Token context);
static void _registerSpecialInverses(const UnicodeString& target1,
const UnicodeString& target2);
public:
/**

60
icu4c/source/test/intltest/transtst.cpp
View File

@ -138,6 +138,7 @@ TransliteratorTest::runIndexedTest(int32_t index, UBool exec,
TESTCASE(56,TestOutputSet);
TESTCASE(57,TestVariableRange);
TESTCASE(58,TestInvalidPostContext);
TESTCASE(59,TestIDForms);
default: name = ""; break;
}
}
@ -1040,18 +1041,18 @@ void TransliteratorTest::TestFilterIDs(void) {
// Array of 3n strings:
// <id>, <inverse id>, <input>, <expected output>
const char* DATA[] = {
"Any[aeiou]-Hex",
"Hex[aeiou]-Any",
"quizzical",
"q\\u0075\\u0069zz\\u0069c\\u0061l",
"Any[aeiou]-Hex", // ID
"[aeiou]Hex-Any", // expected inverse ID
"quizzical", // src
"q\\u0075\\u0069zz\\u0069c\\u0061l", // expected ID.translit(src)
"Any[aeiou]-Hex;Hex[^5]-Any",
"Any[^5]-Hex;Hex[aeiou]-Any",
"[^5]Any-Hex;[aeiou]Hex-Any",
"quizzical",
"q\\u0075izzical",
"Null[abc]",
"Null[abc]",
"[abc]Null",
"xyz",
"xyz",
};
@ -2694,6 +2695,51 @@ void TransliteratorTest::TestInvalidPostContext() {
errln("FAIL: No syntax error");
}
/**
* Test ID form variants
*/
void TransliteratorTest::TestIDForms() {
char* DATA[] = {
"NFC", "NFD",
"nfd", "NFC", // make sure case is ignored
"Any-NFKD", "Any-NFKC",
"Null", "Null",
"Latin-Greek/UNGEGN", "Greek-Latin/UNGEGN",
"Greek/UNGEGN-Latin", "Latin-Greek/UNGEGN",
"Bengali-Devanagari/", "Devanagari-Bengali",
};
const int32_t DATA_length = sizeof(DATA)/sizeof(DATA[0]);
for (int32_t i=0; i<DATA_length; i+=2) {
UParseError pe;
UErrorCode ec = U_ZERO_ERROR;
Transliterator *t =
Transliterator::createInstance(DATA[i], UTRANS_FORWARD, pe, ec);
if (U_FAILURE(ec)) {
errln((UnicodeString)"FAIL: Couldn't create " + DATA[i]);
delete t;
continue;
}
Transliterator *u = t->createInverse(ec);
if (U_FAILURE(ec)) {
errln((UnicodeString)"FAIL: Couldn't create inverse of " + DATA[i]);
delete t;
delete u;
continue;
}
if (t->getID() == DATA[i] &&
u->getID() == DATA[i+1]) {
logln((UnicodeString)"Ok: " + DATA[i] + ".getInverse() => " + DATA[i+1]);
} else {
errln((UnicodeString)"FAIL: getInstance(" + DATA[i] + ") => " +
t->getID() + " x getInverse() => " + u->getID() +
", expected " + DATA[i+1]);
}
delete t;
delete u;
}
}
//======================================================================
// icu4c ONLY
// These tests are not mirrored (yet) in icu4j at

5
icu4c/source/test/intltest/transtst.h
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@ -277,6 +277,11 @@ class TransliteratorTest : public IntlTest {
*/
void TestInvalidPostContext();
/**
* Test ID form variants
*/
void TestIDForms();
//======================================================================
// Support methods
//======================================================================