1634 lines
59 KiB
C++
1634 lines
59 KiB
C++
/*
|
|
**********************************************************************
|
|
* Copyright (C) 1999-2001, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
**********************************************************************
|
|
* Date Name Description
|
|
* 11/17/99 aliu Creation.
|
|
**********************************************************************
|
|
*/
|
|
#include "cmemory.h"
|
|
#include "cstring.h"
|
|
#include "hash.h"
|
|
#include "mutex.h"
|
|
#include "rbt_data.h"
|
|
#include "rbt_pars.h"
|
|
#include "transreg.h"
|
|
#include "ucln_in.h"
|
|
#include "unicode/cpdtrans.h"
|
|
#include "unicode/hextouni.h"
|
|
#include "unicode/locid.h"
|
|
#include "unicode/msgfmt.h"
|
|
#include "unicode/name2uni.h"
|
|
#include "unicode/nortrans.h"
|
|
#include "unicode/nultrans.h"
|
|
#include "unicode/putil.h"
|
|
#include "unicode/rep.h"
|
|
#include "unicode/remtrans.h"
|
|
#include "unicode/resbund.h"
|
|
#include "unicode/titletrn.h"
|
|
#include "unicode/tolowtrn.h"
|
|
#include "unicode/toupptrn.h"
|
|
#include "unicode/translit.h"
|
|
#include "unicode/uni2name.h"
|
|
#include "unicode/unicode.h"
|
|
#include "unicode/unifilt.h"
|
|
#include "unicode/unifltlg.h"
|
|
#include "unicode/uniset.h"
|
|
#include "unicode/unitohex.h"
|
|
#include "unicode/uscript.h"
|
|
|
|
|
|
// keep in sync with CompoundTransliterator
|
|
static const UChar ID_SEP = 0x002D; /*-*/
|
|
static const UChar ID_DELIM = 0x003B; /*;*/
|
|
static const UChar VARIANT_SEP = 0x002F; // '/'
|
|
static const UChar OPEN_PAREN = 40;
|
|
static const UChar CLOSE_PAREN = 41;
|
|
|
|
/**
|
|
* Prefix for resource bundle key for the display name for a
|
|
* transliterator. The ID is appended to this to form the key.
|
|
* The resource bundle value should be a String.
|
|
*/
|
|
static const char RB_DISPLAY_NAME_PREFIX[] = "%Translit%%";
|
|
|
|
/**
|
|
* Prefix for resource bundle key for the display name for a
|
|
* transliterator SCRIPT. The ID is appended to this to form the key.
|
|
* The resource bundle value should be a String.
|
|
*/
|
|
static const char RB_SCRIPT_DISPLAY_NAME_PREFIX[] = "%Translit%";
|
|
|
|
/**
|
|
* Resource bundle key for display name pattern.
|
|
* The resource bundle value should be a String forming a
|
|
* MessageFormat pattern, e.g.:
|
|
* "{0,choice,0#|1#{1} Transliterator|2#{1} to {2} Transliterator}".
|
|
*/
|
|
static const char RB_DISPLAY_NAME_PATTERN[] = "TransliteratorNamePattern";
|
|
|
|
/**
|
|
* Resource bundle key for the list of RuleBasedTransliterator IDs.
|
|
* The resource bundle value should be a String[] with each element
|
|
* being a valid ID. The ID will be appended to RB_RULE_BASED_PREFIX
|
|
* to obtain the class name in which the RB_RULE key will be sought.
|
|
*/
|
|
static const char RB_RULE_BASED_IDS[] = "RuleBasedTransliteratorIDs";
|
|
|
|
/**
|
|
* The mutex controlling access to registry object.
|
|
*/
|
|
static UMTX registryMutex = 0;
|
|
|
|
/**
|
|
* System transliterator registry; non-null when initialized.
|
|
*/
|
|
static TransliteratorRegistry* registry = 0;
|
|
|
|
// Empty string
|
|
static const UChar EMPTY[] = {0}; //""
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* Class identifier for subclasses of Transliterator that do not
|
|
* define their class (anonymous subclasses).
|
|
*/
|
|
const char Transliterator::fgClassID = 0; // Value is irrelevant
|
|
|
|
/**
|
|
* Default constructor.
|
|
* @param theID the string identifier for this transliterator
|
|
* @param theFilter the filter. Any character for which
|
|
* <tt>filter.contains()</tt> returns <tt>FALSE</tt> will not be
|
|
* altered by this transliterator. If <tt>filter</tt> is
|
|
* <tt>null</tt> then no filtering is applied.
|
|
*/
|
|
Transliterator::Transliterator(const UnicodeString& theID,
|
|
UnicodeFilter* adoptedFilter) :
|
|
ID(theID), filter(adoptedFilter),
|
|
maximumContextLength(0) {}
|
|
|
|
/**
|
|
* Destructor.
|
|
*/
|
|
Transliterator::~Transliterator() {
|
|
delete filter;
|
|
}
|
|
|
|
/**
|
|
* Copy constructor.
|
|
*/
|
|
Transliterator::Transliterator(const Transliterator& other) :
|
|
ID(other.ID), filter(0),
|
|
maximumContextLength(other.maximumContextLength) {
|
|
if (other.filter != 0) {
|
|
// We own the filter, so we must have our own copy
|
|
filter = (UnicodeFilter*) other.filter->clone();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Assignment operator.
|
|
*/
|
|
Transliterator& Transliterator::operator=(const Transliterator& other) {
|
|
ID = other.ID;
|
|
maximumContextLength = other.maximumContextLength;
|
|
adoptFilter((other.filter == 0) ? 0 : (UnicodeFilter*) other.filter->clone());
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* Transliterates a segment of a string. <code>Transliterator</code> API.
|
|
* @param text the string to be transliterated
|
|
* @param start the beginning index, inclusive; <code>0 <= start
|
|
* <= limit</code>.
|
|
* @param limit the ending index, exclusive; <code>start <= limit
|
|
* <= text.length()</code>.
|
|
* @return the new limit index
|
|
*/
|
|
int32_t Transliterator::transliterate(Replaceable& text,
|
|
int32_t start, int32_t limit) const {
|
|
|
|
UTransPosition offsets;
|
|
offsets.contextStart= start;
|
|
offsets.contextLimit = limit;
|
|
offsets.start = start;
|
|
offsets.limit = limit;
|
|
filteredTransliterate(text, offsets, FALSE);
|
|
return offsets.limit;
|
|
}
|
|
|
|
/**
|
|
* Transliterates an entire string in place. Convenience method.
|
|
* @param text the string to be transliterated
|
|
*/
|
|
void Transliterator::transliterate(Replaceable& text) const {
|
|
transliterate(text, 0, text.length());
|
|
}
|
|
|
|
/**
|
|
* Transliterates the portion of the text buffer that can be
|
|
* transliterated unambiguosly after new text has been inserted,
|
|
* typically as a result of a keyboard event. The new text in
|
|
* <code>insertion</code> will be inserted into <code>text</code>
|
|
* at <code>index.contextLimit</code>, advancing
|
|
* <code>index.contextLimit</code> by <code>insertion.length()</code>.
|
|
* Then the transliterator will try to transliterate characters of
|
|
* <code>text</code> between <code>index.start</code> and
|
|
* <code>index.contextLimit</code>. Characters before
|
|
* <code>index.start</code> will not be changed.
|
|
*
|
|
* <p>Upon return, values in <code>index</code> will be updated.
|
|
* <code>index.contextStart</code> will be advanced to the first
|
|
* character that future calls to this method will read.
|
|
* <code>index.start</code> and <code>index.contextLimit</code> will
|
|
* be adjusted to delimit the range of text that future calls to
|
|
* this method may change.
|
|
*
|
|
* <p>Typical usage of this method begins with an initial call
|
|
* with <code>index.contextStart</code> and <code>index.contextLimit</code>
|
|
* set to indicate the portion of <code>text</code> to be
|
|
* transliterated, and <code>index.start == index.contextStart</code>.
|
|
* Thereafter, <code>index</code> can be used without
|
|
* modification in future calls, provided that all changes to
|
|
* <code>text</code> are made via this method.
|
|
*
|
|
* <p>This method assumes that future calls may be made that will
|
|
* insert new text into the buffer. As a result, it only performs
|
|
* unambiguous transliterations. After the last call to this
|
|
* method, there may be untransliterated text that is waiting for
|
|
* more input to resolve an ambiguity. In order to perform these
|
|
* pending transliterations, clients should call {@link
|
|
* #finishKeyboardTransliteration} after the last call to this
|
|
* method has been made.
|
|
*
|
|
* @param text the buffer holding transliterated and untransliterated text
|
|
* @param index an array of three integers.
|
|
*
|
|
* <ul><li><code>index.contextStart</code>: the beginning index,
|
|
* inclusive; <code>0 <= index.contextStart <= index.contextLimit</code>.
|
|
*
|
|
* <li><code>index.contextLimit</code>: the ending index, exclusive;
|
|
* <code>index.contextStart <= index.contextLimit <= text.length()</code>.
|
|
* <code>insertion</code> is inserted at
|
|
* <code>index.contextLimit</code>.
|
|
*
|
|
* <li><code>index.start</code>: the next character to be
|
|
* considered for transliteration; <code>index.contextStart <=
|
|
* index.start <= index.contextLimit</code>. Characters before
|
|
* <code>index.start</code> will not be changed by future calls
|
|
* to this method.</ul>
|
|
*
|
|
* @param insertion text to be inserted and possibly
|
|
* transliterated into the translation buffer at
|
|
* <code>index.contextLimit</code>. If <code>null</code> then no text
|
|
* is inserted.
|
|
* @see #START
|
|
* @see #LIMIT
|
|
* @see #CURSOR
|
|
* @see #handleTransliterate
|
|
* @exception IllegalArgumentException if <code>index</code>
|
|
* is invalid
|
|
*/
|
|
void Transliterator::transliterate(Replaceable& text,
|
|
UTransPosition& index,
|
|
const UnicodeString& insertion,
|
|
UErrorCode &status) const {
|
|
_transliterate(text, index, &insertion, status);
|
|
}
|
|
|
|
/**
|
|
* Transliterates the portion of the text buffer that can be
|
|
* transliterated unambiguosly after a new character has been
|
|
* inserted, typically as a result of a keyboard event. This is a
|
|
* convenience method; see {@link
|
|
* #transliterate(Replaceable, int[], String)} for details.
|
|
* @param text the buffer holding transliterated and
|
|
* untransliterated text
|
|
* @param index an array of three integers. See {@link
|
|
* #transliterate(Replaceable, int[], String)}.
|
|
* @param insertion text to be inserted and possibly
|
|
* transliterated into the translation buffer at
|
|
* <code>index.contextLimit</code>.
|
|
* @see #transliterate(Replaceable, int[], String)
|
|
*/
|
|
void Transliterator::transliterate(Replaceable& text,
|
|
UTransPosition& index,
|
|
UChar32 insertion,
|
|
UErrorCode& status) const {
|
|
UnicodeString str(insertion);
|
|
_transliterate(text, index, &str, status);
|
|
}
|
|
|
|
/**
|
|
* Transliterates the portion of the text buffer that can be
|
|
* transliterated unambiguosly. This is a convenience method; see
|
|
* {@link #transliterate(Replaceable, int[], String)} for
|
|
* details.
|
|
* @param text the buffer holding transliterated and
|
|
* untransliterated text
|
|
* @param index an array of three integers. See {@link
|
|
* #transliterate(Replaceable, int[], String)}.
|
|
* @see #transliterate(Replaceable, int[], String)
|
|
*/
|
|
void Transliterator::transliterate(Replaceable& text,
|
|
UTransPosition& index,
|
|
UErrorCode& status) const {
|
|
_transliterate(text, index, 0, status);
|
|
}
|
|
|
|
/**
|
|
* Finishes any pending transliterations that were waiting for
|
|
* more characters. Clients should call this method as the last
|
|
* call after a sequence of one or more calls to
|
|
* <code>transliterate()</code>.
|
|
* @param text the buffer holding transliterated and
|
|
* untransliterated text.
|
|
* @param index the array of indices previously passed to {@link
|
|
* #transliterate}
|
|
*/
|
|
void Transliterator::finishTransliteration(Replaceable& text,
|
|
UTransPosition& index) const {
|
|
filteredTransliterate(text, index, FALSE);
|
|
}
|
|
|
|
/**
|
|
* This internal method does keyboard transliteration. If the
|
|
* 'insertion' is non-null then we append it to 'text' before
|
|
* proceeding. This method calls through to the pure virtual
|
|
* framework method handleTransliterate() to do the actual
|
|
* work.
|
|
*/
|
|
void Transliterator::_transliterate(Replaceable& text,
|
|
UTransPosition& index,
|
|
const UnicodeString* insertion,
|
|
UErrorCode &status) const {
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
if (index.contextStart < 0 ||
|
|
index.start < index.contextStart ||
|
|
index.limit < index.start ||
|
|
index.contextLimit < index.limit ||
|
|
text.length() < index.contextLimit) {
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
// int32_t originalStart = index.contextStart;
|
|
if (insertion != 0) {
|
|
text.handleReplaceBetween(index.limit, index.limit, *insertion);
|
|
index.limit += insertion->length();
|
|
index.contextLimit += insertion->length();
|
|
}
|
|
|
|
if (index.limit > 0 &&
|
|
UTF_IS_LEAD(text.charAt(index.limit - 1))) {
|
|
// Oops, there is a dangling lead surrogate in the buffer.
|
|
// This will break most transliterators, since they will
|
|
// assume it is part of a pair. Don't transliterate until
|
|
// more text comes in.
|
|
return;
|
|
}
|
|
|
|
filteredTransliterate(text, index, TRUE);
|
|
|
|
#if 0
|
|
// I CAN'T DO what I'm attempting below now that the Kleene star
|
|
// operator is supported. For example, in the rule
|
|
|
|
// ([:Lu:]+) { x } > $1;
|
|
|
|
// what is the maximum context length? getMaximumContextLength()
|
|
// will return 1, but this is just the length of the ante context
|
|
// part of the pattern string -- 1 character, which is a standin
|
|
// for a Quantifier, which contains a StringMatcher, which
|
|
// contains a UnicodeSet.
|
|
|
|
// There is a complicated way to make this work again, and that's
|
|
// to add a "maximum left context" protocol into the
|
|
// UnicodeMatcher hierarchy. At present I'm not convinced this is
|
|
// worth it.
|
|
|
|
// ---
|
|
|
|
// The purpose of the code below is to keep the context small
|
|
// while doing incremental transliteration. When part of the left
|
|
// context (between contextStart and start) is no longer needed,
|
|
// we try to advance contextStart past that portion. We use the
|
|
// maximum context length to do so.
|
|
int32_t newCS = index.start;
|
|
int32_t n = getMaximumContextLength();
|
|
while (newCS > originalStart && n-- > 0) {
|
|
--newCS;
|
|
newCS -= UTF_CHAR_LENGTH(text.char32At(newCS)) - 1;
|
|
}
|
|
index.contextStart = uprv_max(newCS, originalStart);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* This method breaks up the input text into runs of unfiltered
|
|
* characters. It passes each such run to
|
|
* <subclass>.handleTransliterate(). Subclasses that can handle the
|
|
* filter logic more efficiently themselves may override this method.
|
|
*
|
|
* All transliteration calls in this class go through this method.
|
|
*/
|
|
void Transliterator::filteredTransliterate(Replaceable& text,
|
|
UTransPosition& index,
|
|
UBool incremental) const {
|
|
if (filter == 0) {
|
|
// Short circuit path for transliterators with no filter
|
|
handleTransliterate(text, index, incremental);
|
|
return;
|
|
}
|
|
|
|
// globalLimit is the limit value for the entire operation. We
|
|
// set index.limit to the end of each unfiltered run before
|
|
// calling handleTransliterate(), so we need to maintain the real
|
|
// value of index.limit here. After each transliteration, we
|
|
// update globalLimit for insertions or deletions that have
|
|
// happened.
|
|
int32_t globalLimit = index.limit;
|
|
|
|
// Break the input text up. Say the input text has the form:
|
|
// xxxabcxxdefxx
|
|
// where 'x' represents a filtered character. Then we break this
|
|
// up into:
|
|
// xxxabc xxdef xx
|
|
// Each pass through the loop consumes a run of filtered
|
|
// characters (which are ignored) and a subsequent run of
|
|
// unfiltered characters (which are transliterated). If, at any
|
|
// point, we fail to consume our entire segment, we stop.
|
|
for (;;) {
|
|
// Narrow the range to be transliterated to the first segment
|
|
// of unfiltered characters at or after index.start.
|
|
|
|
UChar32 c;
|
|
|
|
// Advance compoundStart past filtered chars
|
|
while (index.start < globalLimit &&
|
|
!filter->contains(c=text.char32At(index.start))) {
|
|
index.start += UTF_CHAR_LENGTH(c);
|
|
}
|
|
|
|
// Find the end of this run of unfiltered chars
|
|
index.limit = index.start;
|
|
while (index.limit < globalLimit &&
|
|
filter->contains(c=text.char32At(index.limit))) {
|
|
index.limit += UTF_CHAR_LENGTH(c);
|
|
}
|
|
|
|
// Check to see if the unfiltered run is empty. This only
|
|
// happens at the end of the string when all the remaining
|
|
// characters are filtered.
|
|
if (index.limit == index.start) {
|
|
// assert(index.start == globalLimit);
|
|
break;
|
|
}
|
|
|
|
int32_t limit = index.limit;
|
|
|
|
// Is this segment incremental? If there is additional
|
|
// filtered text (if limit < globalLimit) then we pass in
|
|
// an incremental value of FALSE to force the subclass to
|
|
// complete the transliteration for this segment.
|
|
UBool isIncrementalSegment =
|
|
(limit < globalLimit ? FALSE : incremental);
|
|
|
|
// Implement rollback. To understand the need for rollback,
|
|
// consider the following transliterator:
|
|
//
|
|
// "t" is "a > A;"
|
|
// "u" is "A > b;"
|
|
// "v" is a compound of "t; NFD; u" with a filter [:Ll:]
|
|
//
|
|
// Now apply "c" to the input text "a". The result is "b". But if
|
|
// the transliteration is done incrementally, then the NFD holds
|
|
// things up after "t" has already transformed "a" to "A". When
|
|
// finishTransliterate() is called, "A" is _not_ processed because
|
|
// it gets excluded by the [:Ll:] filter, and the end result is "A"
|
|
// -- incorrect. The problem is that the filter is applied to a
|
|
// partially-transliterated result, when we only want it to apply to
|
|
// input text. Although this example hinges on a compound
|
|
// transliterator containing NFD and a specific filter, it can
|
|
// actually happen with any transliterator which may do a partial
|
|
// transformation in incremental mode into characters outside its
|
|
// filter.
|
|
//
|
|
// There are two solutions. The first is to add two new index
|
|
// values to the position structure, a filteredStart and a
|
|
// filteredLimit. Then filteredTransliterate() can set and read
|
|
// these, and avoid filtering partially transliterated results. A
|
|
// variant of this solution is to retain an internal state object
|
|
// with the filtered range that is indexed by the text pointer and
|
|
// the position object pointer, in analogy to strtok(). The third
|
|
// solution involves no change to the API and no internal state
|
|
// cache. It is to roll back any partially transliterated results
|
|
// if (a) there is a filter, and (b) the transliteration is
|
|
// incremental. This is the solution implemented here.
|
|
int32_t rollbackStart = 0;
|
|
int32_t rollbackCopy = 0;
|
|
if (isIncrementalSegment) {
|
|
// Make a rollback copy at the end of the string
|
|
rollbackStart = index.start;
|
|
rollbackCopy = text.length();
|
|
text.copy(rollbackStart, limit, rollbackCopy);
|
|
}
|
|
|
|
// Delegate to subclass for actual transliteration.
|
|
handleTransliterate(text, index, isIncrementalSegment);
|
|
|
|
int32_t delta = index.limit - limit; // change in length
|
|
|
|
// Adjust overall limit for insertions/deletions. Don't need
|
|
// to worry about contextLimit because handleTransliterate()
|
|
// maintains that.
|
|
globalLimit += delta;
|
|
|
|
// If we failed to complete transliterate this segment,
|
|
// then we are done. If rollback is required, then do so.
|
|
if (index.start != index.limit) {
|
|
if (isIncrementalSegment) {
|
|
// Replace [rollbackStart, limit) -- this is the
|
|
// original filtered segment -- with
|
|
// [rollbackCopy, text.length()), the rollback
|
|
// copy, then delete the rollback copy.
|
|
rollbackCopy += delta;
|
|
int32_t rollbackLen = text.length() - rollbackCopy;
|
|
|
|
// Delete the partially transliterated segment
|
|
rollbackCopy -= index.limit - rollbackStart;
|
|
text.handleReplaceBetween(rollbackStart, index.limit, EMPTY);
|
|
|
|
// Copy the rollback copy back
|
|
text.copy(rollbackCopy, text.length(), rollbackStart);
|
|
|
|
// Delete the rollback copy
|
|
rollbackCopy += rollbackLen;
|
|
text.handleReplaceBetween(rollbackCopy, text.length(), EMPTY);
|
|
|
|
// Restore indices
|
|
index.start = rollbackStart;
|
|
index.limit = limit;
|
|
index.contextLimit -= delta;
|
|
globalLimit -= delta;
|
|
}
|
|
break;
|
|
} else if (isIncrementalSegment) {
|
|
// We finished this segment; delete the rollback copy
|
|
rollbackCopy += delta;
|
|
text.handleReplaceBetween(rollbackCopy, text.length(), EMPTY);
|
|
}
|
|
|
|
// If we did completely transliterate this
|
|
// segment, then repeat with the next unfiltered segment.
|
|
}
|
|
|
|
// Start is valid where it is. Limit needs to be put back where
|
|
// it was, modulo adjustments for deletions/insertions.
|
|
index.limit = globalLimit;
|
|
}
|
|
|
|
/**
|
|
* Method for subclasses to use to set the maximum context length.
|
|
* @see #getMaximumContextLength
|
|
*/
|
|
void Transliterator::setMaximumContextLength(int32_t maxContextLength) {
|
|
maximumContextLength = maxContextLength;
|
|
}
|
|
|
|
/**
|
|
* Returns a programmatic identifier for this transliterator.
|
|
* If this identifier is passed to <code>getInstance()</code>, it
|
|
* will return this object, if it has been registered.
|
|
* @see #registerInstance
|
|
* @see #getAvailableIDs
|
|
*/
|
|
const UnicodeString& Transliterator::getID(void) const {
|
|
return ID;
|
|
}
|
|
|
|
/**
|
|
* Returns a name for this transliterator that is appropriate for
|
|
* display to the user in the default locale. See {@link
|
|
* #getDisplayName(Locale)} for details.
|
|
*/
|
|
UnicodeString& Transliterator::getDisplayName(const UnicodeString& ID,
|
|
UnicodeString& result) {
|
|
return getDisplayName(ID, Locale::getDefault(), result);
|
|
}
|
|
|
|
/**
|
|
* Returns a name for this transliterator that is appropriate for
|
|
* display to the user in the given locale. This name is taken
|
|
* from the locale resource data in the standard manner of the
|
|
* <code>java.text</code> package.
|
|
*
|
|
* <p>If no localized names exist in the system resource bundles,
|
|
* a name is synthesized using a localized
|
|
* <code>MessageFormat</code> pattern from the resource data. The
|
|
* arguments to this pattern are an integer followed by one or two
|
|
* strings. The integer is the number of strings, either 1 or 2.
|
|
* The strings are formed by splitting the ID for this
|
|
* transliterator at the first ID_SEP. If there is no ID_SEP, then the
|
|
* entire ID forms the only string.
|
|
* @param inLocale the Locale in which the display name should be
|
|
* localized.
|
|
* @see java.text.MessageFormat
|
|
*/
|
|
UnicodeString& Transliterator::getDisplayName(const UnicodeString& ID,
|
|
const Locale& inLocale,
|
|
UnicodeString& result) {
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
|
|
ResourceBundle bundle(u_getDataDirectory(), inLocale, status);
|
|
|
|
// Suspend checking status until later...
|
|
|
|
// build the char* key
|
|
char key[200];
|
|
uprv_strcpy(key, RB_DISPLAY_NAME_PREFIX);
|
|
int32_t length=(int32_t)uprv_strlen(RB_DISPLAY_NAME_PREFIX);
|
|
ID.extract(0, (int32_t)(sizeof(key)-length), key+length, "");
|
|
|
|
// Try to retrieve a UnicodeString from the bundle.
|
|
UnicodeString resString = bundle.getStringEx(key, status);
|
|
|
|
if (U_SUCCESS(status) && resString.length() != 0) {
|
|
return result = resString; // [sic] assign & return
|
|
}
|
|
|
|
// We have failed to get a name from the locale data. This is
|
|
// typical, since most transliterators will not have localized
|
|
// name data. The next step is to retrieve the MessageFormat
|
|
// pattern from the locale data and to use it to synthesize the
|
|
// name from the ID.
|
|
|
|
status = U_ZERO_ERROR;
|
|
resString = bundle.getStringEx(RB_DISPLAY_NAME_PATTERN, status);
|
|
|
|
if (U_SUCCESS(status) && resString.length() != 0) {
|
|
MessageFormat msg(resString, inLocale, status);
|
|
// Suspend checking status until later...
|
|
|
|
// We pass either 2 or 3 Formattable objects to msg.
|
|
Formattable args[3];
|
|
int32_t i = ID.indexOf(ID_SEP);
|
|
int32_t nargs;
|
|
if (i < 0) {
|
|
args[0].setLong(1); // # of args to follow
|
|
args[1].setString(ID);
|
|
nargs = 2;
|
|
} else {
|
|
UnicodeString left, right;
|
|
ID.extractBetween(0, i, left);
|
|
ID.extractBetween(i+1, ID.length(), right);
|
|
args[0].setLong(2); // # of args to follow
|
|
args[1].setString(left);
|
|
args[2].setString(right);
|
|
nargs = 3;
|
|
}
|
|
|
|
// Use display names for the scripts, if they exist
|
|
UnicodeString s;
|
|
length=(int32_t)uprv_strlen(RB_SCRIPT_DISPLAY_NAME_PREFIX);
|
|
for (int j=1; j<=((i<0)?1:2); ++j) {
|
|
status = U_ZERO_ERROR;
|
|
uprv_strcpy(key, RB_SCRIPT_DISPLAY_NAME_PREFIX);
|
|
args[j].getString(s);
|
|
s.extract(0, sizeof(key)-length-1, key+length, "");
|
|
|
|
resString = bundle.getStringEx(key, status);
|
|
|
|
if (U_SUCCESS(status)) {
|
|
args[j] = resString;
|
|
}
|
|
}
|
|
|
|
status = U_ZERO_ERROR;
|
|
FieldPosition pos; // ignored by msg
|
|
msg.format(args, nargs, result, pos, status);
|
|
if (U_SUCCESS(status)) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
// We should not reach this point unless there is something
|
|
// wrong with the build or the RB_DISPLAY_NAME_PATTERN has
|
|
// been deleted from the root RB_LOCALE_ELEMENTS resource.
|
|
result = ID;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns the filter used by this transliterator, or <tt>null</tt>
|
|
* if this transliterator uses no filter. Caller musn't delete
|
|
* the result!
|
|
*/
|
|
const UnicodeFilter* Transliterator::getFilter(void) const {
|
|
return filter;
|
|
}
|
|
|
|
/**
|
|
* Returns the filter used by this transliterator, or
|
|
* <tt>NULL</tt> if this transliterator uses no filter. The
|
|
* caller must eventually delete the result. After this call,
|
|
* this transliterator's filter is set to <tt>NULL</tt>.
|
|
*/
|
|
UnicodeFilter* Transliterator::orphanFilter(void) {
|
|
UnicodeFilter *result = filter;
|
|
filter = NULL;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Changes the filter used by this transliterator. If the filter
|
|
* is set to <tt>null</tt> then no filtering will occur.
|
|
*
|
|
* <p>Callers must take care if a transliterator is in use by
|
|
* multiple threads. The filter should not be changed by one
|
|
* thread while another thread may be transliterating.
|
|
*/
|
|
void Transliterator::adoptFilter(UnicodeFilter* filterToAdopt) {
|
|
delete filter;
|
|
filter = filterToAdopt;
|
|
}
|
|
|
|
/**
|
|
* Returns this transliterator's inverse. See the class
|
|
* documentation for details. This implementation simply inverts
|
|
* the two entities in the ID and attempts to retrieve the
|
|
* resulting transliterator. That is, if <code>getID()</code>
|
|
* returns "A-B", then this method will return the result of
|
|
* <code>getInstance("B-A")</code>, or <code>null</code> if that
|
|
* call fails.
|
|
*
|
|
* <p>This method does not take filtering into account. The
|
|
* returned transliterator will have no filter.
|
|
*
|
|
* <p>Subclasses with knowledge of their inverse may wish to
|
|
* override this method.
|
|
*
|
|
* @return a transliterator that is an inverse, not necessarily
|
|
* exact, of this transliterator, or <code>null</code> if no such
|
|
* transliterator is registered.
|
|
* @see #registerInstance
|
|
*/
|
|
Transliterator* Transliterator::createInverse(UErrorCode& status) const {
|
|
UParseError parseError;
|
|
return Transliterator::createInstance(ID, UTRANS_REVERSE,parseError,status);
|
|
}
|
|
|
|
/**
|
|
* Returns a <code>Transliterator</code> object given its ID.
|
|
* The ID must be either a system transliterator ID or a ID registered
|
|
* using <code>registerInstance()</code>.
|
|
*
|
|
* @param ID a valid ID, as enumerated by <code>getAvailableIDs()</code>
|
|
* @return A <code>Transliterator</code> object with the given ID
|
|
* @see #registerInstance
|
|
* @see #getAvailableIDs
|
|
* @see #getID
|
|
*/
|
|
Transliterator* Transliterator::createInstance(const UnicodeString& ID,
|
|
UTransDirection dir,
|
|
UParseError& parseError,
|
|
UErrorCode& status) {
|
|
return createInstance(ID, dir, -1, NULL, parseError, status);
|
|
}
|
|
|
|
Transliterator* Transliterator::createInstance(const UnicodeString& ID,
|
|
UTransDirection dir,
|
|
UErrorCode& status) {
|
|
UParseError parseError;
|
|
return createInstance(ID, dir, -1, NULL, parseError, status);
|
|
}
|
|
|
|
/**
|
|
* Create a transliterator given a compound ID (possibly degenerate,
|
|
* with no ID_DELIM). If idSplitPoint >= 0 and adoptedSplitTrans !=
|
|
* 0, then insert adoptedSplitTrans in the compound ID at offset
|
|
* idSplitPoint. Otherwise idSplitPoint should be -1 and
|
|
* adoptedSplitTrans should be 0. The resultant transliterator will
|
|
* be an atomic (non-compound) transliterator if this is indicated by
|
|
* ID. Otherwise it will be a compound translitertor.
|
|
*/
|
|
Transliterator* Transliterator::createInstance(const UnicodeString& ID,
|
|
UTransDirection dir,
|
|
int32_t idSplitPoint,
|
|
Transliterator *adoptedSplitTrans,
|
|
UParseError& parseError,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) {
|
|
return 0;
|
|
}
|
|
|
|
UVector list(status);
|
|
int32_t ignored;
|
|
UnicodeString regenID;
|
|
UnicodeSet* compoundFilter = 0;
|
|
parseCompoundID(ID, regenID, dir, idSplitPoint, adoptedSplitTrans,
|
|
list, ignored, compoundFilter, parseError, status);
|
|
|
|
if (U_FAILURE(status)) {
|
|
return 0;
|
|
}
|
|
|
|
Transliterator *t;
|
|
switch (list.size()) {
|
|
case 0:
|
|
t = new NullTransliterator();
|
|
break;
|
|
case 1:
|
|
t = (Transliterator*) list.elementAt(0);
|
|
break;
|
|
default:
|
|
t = new CompoundTransliterator(dir, list, status);
|
|
break;
|
|
}
|
|
t->setID(regenID);
|
|
if (compoundFilter != NULL) {
|
|
t->adoptFilter(compoundFilter);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
/**
|
|
* Returns a <code>Transliterator</code> object constructed from
|
|
* the given rule string. This will be a RuleBasedTransliterator,
|
|
* if the rule string contains only rules, or a
|
|
* CompoundTransliterator, if it contains ID blocks, or a
|
|
* NullTransliterator, if it contains ID blocks which parse as
|
|
* empty for the given direction.
|
|
*/
|
|
Transliterator* Transliterator::createFromRules(const UnicodeString& ID,
|
|
const UnicodeString& rules,
|
|
UTransDirection dir,
|
|
UParseError& parseError,
|
|
UErrorCode& status) {
|
|
Transliterator* t = NULL;
|
|
|
|
TransliteratorParser parser;
|
|
parser.parse(rules, dir, parseError, status);
|
|
|
|
if (U_FAILURE(status)) {
|
|
return 0;
|
|
}
|
|
|
|
// NOTE: The logic here matches that in TransliteratorRegistry.
|
|
if (parser.idBlock.length() == 0) {
|
|
if (parser.data == NULL) {
|
|
// No idBlock, no data -- this is just an
|
|
// alias for Null
|
|
t = new NullTransliterator();
|
|
} else {
|
|
// No idBlock, data != 0 -- this is an
|
|
// ordinary RBT_DATA.
|
|
t = new RuleBasedTransliterator(ID, parser.orphanData(), TRUE); // TRUE == adopt data object
|
|
}
|
|
} else {
|
|
if (parser.data == NULL) {
|
|
// idBlock, no data -- this is an alias. The ID has
|
|
// been munged from reverse into forward mode, if
|
|
// necessary, so instantiate the ID in the forward
|
|
// direction.
|
|
t = createInstance(parser.idBlock, UTRANS_FORWARD, parseError, status);
|
|
if (t != NULL) {
|
|
t->setID(ID);
|
|
}
|
|
} else {
|
|
// idBlock and data -- this is a compound
|
|
// RBT
|
|
UnicodeString id("_", "");
|
|
t = new RuleBasedTransliterator(id, parser.orphanData(), TRUE); // TRUE == adopt data object
|
|
t = new CompoundTransliterator(ID, parser.idBlock, parser.idSplitPoint,
|
|
t, parseError, status);
|
|
if (U_FAILURE(status)) {
|
|
delete t;
|
|
t = 0;
|
|
}
|
|
if (parser.compoundFilter != NULL) {
|
|
t->adoptFilter(parser.orphanCompoundFilter());
|
|
}
|
|
return t;
|
|
}
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
UnicodeString& Transliterator::toRules(UnicodeString& rulesSource,
|
|
UBool escapeUnprintable) const {
|
|
// The base class implementation of toRules munges the ID into
|
|
// the correct format. That is: foo => ::foo
|
|
rulesSource = getID();
|
|
// KEEP in sync with rbt_pars
|
|
rulesSource.insert(0, UnicodeString("::", ""));
|
|
rulesSource.append(ID_DELIM);
|
|
return rulesSource;
|
|
}
|
|
|
|
/**
|
|
* Parse a compound ID (possibly a degenerate one, containing no
|
|
* ID_DELIM). If idSplitPoint >= 0 and adoptedSplitTrans != 0, then
|
|
* insert adoptedSplitTrans in the compound ID at offset idSplitPoint.
|
|
* Otherwise idSplitPoint should be -1 and adoptedSplitTrans should be
|
|
* 0. Return in the result vector the instantiated transliterator
|
|
* objects (one of these will be adoptedSplitTrans, if the latter was
|
|
* specified). These will be in order of id, so if dir is REVERSE,
|
|
* then the caller will have to reverse the order.
|
|
*
|
|
* @param regenID regenerated ID, reversed if appropriate, which
|
|
* should be applied to the final created transliterator
|
|
* @param splitTransIndex output parameter to receive the index in
|
|
* 'result' at which the adoptedSplitTrans is stored, or -1 if
|
|
* adoptedSplitTrans == 0
|
|
*/
|
|
void Transliterator::parseCompoundID(const UnicodeString& id,
|
|
UnicodeString& regenID,
|
|
UTransDirection dir,
|
|
int32_t idSplitPoint,
|
|
Transliterator *adoptedSplitTrans,
|
|
UVector& result,
|
|
int32_t& splitTransIndex,
|
|
UnicodeSet*& compoundFilter,
|
|
UParseError& parseError,
|
|
UErrorCode& status) {
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
regenID.truncate(0);
|
|
splitTransIndex = -1;
|
|
int32_t pos = 0;
|
|
int32_t i;
|
|
|
|
// A compound filter is a filter on an entire compound
|
|
// transliterator. It is indicated by the syntax [abc]; A-B;
|
|
// B-C or in the reverse direction A-B; B-C; ([abc]). We
|
|
// record the filter and its index (in terms of the result
|
|
// vector).
|
|
compoundFilter = NULL;
|
|
int32_t compoundFilterIndex = -1;
|
|
|
|
while (pos < id.length()) {
|
|
// We compare (pos >= split), not (pos == split), so we can
|
|
// skip over whitespace (see below).
|
|
if (pos >= idSplitPoint && adoptedSplitTrans != 0) {
|
|
splitTransIndex = result.size();
|
|
result.addElement(adoptedSplitTrans, status);
|
|
adoptedSplitTrans = 0;
|
|
}
|
|
int32_t p = pos;
|
|
UBool sawDelimiter; // We ignore this
|
|
UnicodeSet* cpdFilter = NULL;
|
|
Transliterator *t =
|
|
parseID(id, regenID, p, sawDelimiter, cpdFilter, dir, parseError, TRUE,status);
|
|
|
|
if(U_FAILURE(status)){
|
|
delete t;
|
|
delete cpdFilter;
|
|
break;
|
|
}
|
|
if (cpdFilter != NULL) {
|
|
if (compoundFilter != NULL) {
|
|
status = U_MULTIPLE_COMPOUND_FILTERS;
|
|
delete t;
|
|
delete cpdFilter;
|
|
break;
|
|
}
|
|
compoundFilter = cpdFilter;
|
|
compoundFilterIndex = result.size();
|
|
}
|
|
|
|
if (p == pos || (p < id.length() && !sawDelimiter)) {
|
|
delete t;
|
|
status = U_ILLEGAL_ARGUMENT_ERROR;
|
|
break;
|
|
}
|
|
pos = p;
|
|
// The return value may be NULL when, for instance, creating a
|
|
// REVERSE transliterator of ID "Latin-Greek()".
|
|
if (t != 0) {
|
|
result.addElement(t, status);
|
|
}
|
|
}
|
|
|
|
// Handle case of idSplitPoint == id.length()
|
|
if (U_SUCCESS(status) && pos >= idSplitPoint && adoptedSplitTrans != 0) {
|
|
splitTransIndex = result.size();
|
|
result.addElement(adoptedSplitTrans, status);
|
|
adoptedSplitTrans = 0;
|
|
}
|
|
|
|
// Check validity of compound filter position
|
|
if (compoundFilter != NULL) {
|
|
if ((dir == UTRANS_FORWARD && compoundFilterIndex != 0) ||
|
|
(dir == UTRANS_REVERSE && compoundFilterIndex != result.size())) {
|
|
status = U_MISPLACED_COMPOUND_FILTER;
|
|
}
|
|
}
|
|
|
|
if (U_FAILURE(status)) {
|
|
for (i=0; i<result.size(); ++i) {
|
|
delete (Transliterator*)result.elementAt(i);
|
|
}
|
|
result.removeAllElements();
|
|
delete adoptedSplitTrans;
|
|
delete compoundFilter;
|
|
compoundFilter = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse a single ID, possibly including an inline filter, and return
|
|
* the resultant transliterator object. NOTE: If 'create' is FALSE,
|
|
* then the amount of syntax checking is limited. However, the 'pos'
|
|
* parameter will be updated correctly, assuming the input string is
|
|
* valid.
|
|
*
|
|
* A trailing /;? \s* / is skipped. The parameter sawDelimiter
|
|
* indicates whether the ';' was seen or not. Upon return, if pos is
|
|
* advanced, it will either point to a non-whitespace character past
|
|
* the trailing ';', if any, or be equal to length().
|
|
*
|
|
* @param ID the ID string
|
|
* @param regenID regenerated ID, reversed if appropriate, which
|
|
* should be applied to the final created transliterator. This method
|
|
* will append to this parameter for FORWARD direction and insert
|
|
* addition text at offset 0 for REVERSE direction. If create is
|
|
* FALSE then this parameter is not used.
|
|
* @param pos INPUT-OUTPUT parameter. On input, the position of the
|
|
* first character to parse. On output, the position after the last
|
|
* character parsed. This will be a semicolon or ID.length(). In the
|
|
* case of an error this value will be unchanged.
|
|
* @param compoundFilter OUTPUT parameter to receive a compound
|
|
* filter, if one is parsed. When a non-null compound filter is
|
|
* returned then a null Transliterator pointer is returned.
|
|
* @param create if TRUE, create and return the result. If FALSE,
|
|
* only scan the ID, and return NULL.
|
|
* @return a newly created transliterator, or NULL. NULL is returned
|
|
* in all cases if create is FALSE. If create is TRUE, then NULL is
|
|
* returned on error, or if the ID is effectively empty.
|
|
* E.g. "Latin-Greek()" with dir == REVERSE. Do NOT check for NULL to
|
|
* determine if there was an error. Instead, check to see if pos
|
|
* moved.
|
|
*/
|
|
Transliterator* Transliterator::parseID(const UnicodeString& ID,
|
|
UnicodeString& regenID,
|
|
int32_t& pos,
|
|
UBool& sawDelimiter,
|
|
UnicodeSet*& compoundFilter,
|
|
UTransDirection dir,
|
|
UParseError& parseError,
|
|
UBool create,
|
|
UErrorCode& status) {
|
|
int32_t limit, preDelimLimit,
|
|
revStart, revLimit,
|
|
idStart, idLimit,
|
|
setStart, setLimit;
|
|
|
|
UnicodeSet* fwdFilter = NULL;
|
|
UnicodeSet* revFilter = NULL;
|
|
UnicodeSet* filter = 0;
|
|
|
|
if (!parseIDBounds(ID, pos, FALSE, limit,
|
|
setStart, setLimit, revStart, fwdFilter)) {
|
|
delete fwdFilter;
|
|
return 0;
|
|
}
|
|
filter = fwdFilter;
|
|
|
|
idStart = pos;
|
|
idLimit = limit;
|
|
|
|
if (revStart >= 0 && revStart < limit) {
|
|
int32_t revSetStart, revSetLimit, dummy;
|
|
if (!parseIDBounds(ID, revStart+1, TRUE, revLimit,
|
|
revSetStart, revSetLimit, dummy, revFilter)) {
|
|
delete fwdFilter;
|
|
delete revFilter;
|
|
return 0;
|
|
}
|
|
// revStart points to '('
|
|
if (dir == UTRANS_REVERSE) {
|
|
idStart = revStart+1;
|
|
idLimit = revLimit;
|
|
setStart = revSetStart;
|
|
setLimit = revSetLimit;
|
|
delete fwdFilter;
|
|
fwdFilter = NULL;
|
|
filter = revFilter;
|
|
} else {
|
|
idLimit = revStart;
|
|
delete revFilter;
|
|
revFilter = NULL;
|
|
}
|
|
// assert(revLimit < ID.length() && ID.charAt(revLimit) == ')');
|
|
limit = revLimit+1;
|
|
} else {
|
|
// Ignore () exprs outside of this atomic ID, that is, in
|
|
// "Greek-Latin; Title()", ignore the "()" after Title when
|
|
// parsing Greek-Latin.
|
|
revStart = -1;
|
|
}
|
|
|
|
// Advance limit past /\s*;?\s*/
|
|
preDelimLimit = limit;
|
|
skipSpaces(ID, limit);
|
|
sawDelimiter = (limit < ID.length() && ID.charAt(limit) == ID_DELIM);
|
|
if (sawDelimiter) {
|
|
skipSpaces(ID, ++limit);
|
|
}
|
|
|
|
// 'id' is the ID with the filter pattern removed and with
|
|
// whitespace deleted. In a Foo(Bar) ID, id is Foo for FORWARD
|
|
// and Bar for REVERSE.
|
|
UnicodeString id, str;
|
|
ID.extractBetween(idStart, setStart, id);
|
|
ID.extractBetween(setLimit, idLimit, str);
|
|
id.append(str);
|
|
|
|
// Delete whitespace
|
|
int32_t i;
|
|
for (i=0; i<id.length(); ++i) {
|
|
if (u_isspace(id.charAt(i))) {
|
|
id.remove(i, 1);
|
|
--i;
|
|
}
|
|
}
|
|
|
|
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
|
|
// as long as its in the right place -- we let the caller
|
|
// decide that.
|
|
UBool isCompoundFilter = (id.length() == 0 && filter != NULL);
|
|
if (isCompoundFilter) {
|
|
if (dir == UTRANS_FORWARD) {
|
|
compoundFilter = fwdFilter;
|
|
delete revFilter;
|
|
revFilter = NULL;
|
|
} else {
|
|
compoundFilter = revFilter;
|
|
delete fwdFilter;
|
|
fwdFilter = NULL;
|
|
}
|
|
}
|
|
|
|
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", "");
|
|
}
|
|
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
|
|
// need to check for an empty part, which represents a Null
|
|
// transliterator. We return 0 (not a NullTransliterator). If we
|
|
// are not of the form Foo(Bar) then an empty string is illegal.
|
|
if (revStart >= 0 && id.length() == 0) {
|
|
// Ignore any filters; filters on Null are meaningless (and we
|
|
// can't attach them to 0 anyway)
|
|
delete filter;
|
|
}
|
|
|
|
else if (create) {
|
|
// Create the actual transliterator from the registry
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
parseError.line = parseError.offset = 0;
|
|
parseError.preContext[0] = parseError.postContext[0] = 0;
|
|
TransliteratorAlias* alias = 0;
|
|
{
|
|
Mutex lock(®istryMutex);
|
|
t = registry->get(id, alias, parseError,status);
|
|
// Need to enclose this in a block to prevent deadlock when
|
|
// instantiating aliases (below).
|
|
}
|
|
|
|
if (alias != 0) {
|
|
// assert(t==0);
|
|
// Instantiate an alias
|
|
t = alias->create(parseError, status);
|
|
delete alias;
|
|
}
|
|
|
|
if (t == 0) {
|
|
// Creation failed; the ID is invalid
|
|
delete filter;
|
|
return 0;
|
|
}
|
|
|
|
// Set the filter, if any. The transliterator may
|
|
// already have a filter on it so we need to AND any
|
|
// id-based filter together with it. E.g.,
|
|
// getInstance("[abc] Latin-Foo"), where Latin-Foo is
|
|
// an RBT of "::[:Latin:]; a>A;".
|
|
// getInstance("Latin-Foo") is going to return an RBT
|
|
// with an a [:Latin:] filter, and we need to AND this
|
|
// with [abc].
|
|
t->adoptFilter(UnicodeFilterLogic::createAdoptingAnd(filter, t->orphanFilter()));
|
|
}
|
|
|
|
else {
|
|
delete filter;
|
|
}
|
|
}
|
|
|
|
// Set the ID. This is normally just a substring of the input
|
|
// ID, but for reverse transliterators we need to munge A-B to
|
|
// B-A or Foo(Bar) to Bar(Foo).
|
|
if (dir == UTRANS_FORWARD) {
|
|
ID.extractBetween(pos, preDelimLimit, id);
|
|
} else if (isCompoundFilter) {
|
|
// Change [:Foo:] to ([:Foo:]) and vice versa
|
|
id.truncate(0);
|
|
if (revStart < 0) {
|
|
ID.extractBetween(setStart, setLimit, id);
|
|
id.insert(0, OPEN_PAREN);
|
|
id.append(CLOSE_PAREN);
|
|
} else {
|
|
ID.extractBetween(revStart+1, revLimit, id);
|
|
}
|
|
} else if (revStart < 0) {
|
|
id.insert(sep, ID, setStart, setLimit-setStart);
|
|
} else {
|
|
// Change Foo(Bar) to Bar(Foo)
|
|
ID.extractBetween(pos, revStart, str);
|
|
str.trim();
|
|
ID.extractBetween(revStart+1, revLimit, id);
|
|
id.trim().append(OPEN_PAREN).append(str).append(CLOSE_PAREN);
|
|
}
|
|
id.trim();
|
|
|
|
if (t != 0) {
|
|
t->setID(id);
|
|
}
|
|
|
|
// Regenerate ID of a compound entity
|
|
if (dir == UTRANS_FORWARD) {
|
|
if (regenID.length() != 0) {
|
|
regenID.append(ID_DELIM);
|
|
}
|
|
regenID.append(id);
|
|
} else {
|
|
if (regenID.length() != 0) {
|
|
regenID.insert(0, ID_DELIM);
|
|
}
|
|
regenID.insert(0, id);
|
|
}
|
|
|
|
// Indicate success by bumping pos past the final /;?\s*/.
|
|
pos = limit;
|
|
|
|
return t;
|
|
}
|
|
|
|
/**
|
|
* Internal method used by parseID. Given a piece of a single ID,
|
|
* find the boundaries of various parts. For IDs of the form
|
|
* Foo(Bar), this method parses the Foo, then the Bar. In each piece
|
|
* it locates any inline UnicodeSet pattern [setStart, setLimit)
|
|
* and finds the limit (this will point to either ';' or ')' or
|
|
* ID.length()).
|
|
*
|
|
* @param ID the ID to be parsed
|
|
* @param pos the index of ID at which to start
|
|
* @param withinParens if TRUE, parse the Bar of Foo(Bar), stop at a
|
|
* close paren, and do not look for an open paren. If TRUE then a
|
|
* close paren MUST be seen or FALSE is returned; if FALSE then the
|
|
* ';' delimiter is optional.
|
|
* @param limit set to the position of ';' or ')' (depending on
|
|
* withinParens), or ID.length() if no delimiter was found
|
|
* @param setStart set to the start of an inline filter pattern,
|
|
* or pos if none
|
|
* @param setLimit set to the limit of an inline filter pattern,
|
|
* or pos if none
|
|
* @param revStart if not withinParens then set to the position of the
|
|
* first '(', which may be > limit; otherwise set to -1
|
|
* @param filter set to a newly created UnicodeSet object for the
|
|
* inline filter pattern, if any; OWNED BY THE CALLER
|
|
*
|
|
* @return TRUE if the pattern is valid, FALSE is there is an invalid
|
|
* UnicodeSet pattern or if withinParens is TRUE and no close paren is
|
|
* seen.
|
|
*/
|
|
UBool Transliterator::parseIDBounds(const UnicodeString& ID,
|
|
int32_t pos,
|
|
UBool withinParens,
|
|
int32_t& limit,
|
|
int32_t& setStart,
|
|
int32_t& setLimit,
|
|
int32_t& revStart,
|
|
UnicodeSet*& filter) {
|
|
UChar endDelimiter = withinParens ? CLOSE_PAREN : ID_DELIM;
|
|
limit = ID.indexOf(endDelimiter, pos);
|
|
if (limit < 0) {
|
|
if (withinParens) {
|
|
return FALSE;
|
|
}
|
|
limit = ID.length();
|
|
}
|
|
setStart = ID.indexOf((UChar)0x005B /*[*/, pos);
|
|
revStart = withinParens ? -1 : ID.indexOf(OPEN_PAREN, pos);
|
|
|
|
if (setStart >= 0 && setStart < limit &&
|
|
(revStart < 0 || setStart < revStart)) {
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
ParsePosition ppos(setStart);
|
|
// TODO Improve performance by scanning the UnicodeSet pattern
|
|
// without actually constructing it, if create is FALSE. That
|
|
// is, create a method like this one for UnicodeSet.
|
|
filter = new UnicodeSet();
|
|
filter->applyPattern(ID, ppos, 0, status);
|
|
if (U_FAILURE(status)) {
|
|
delete filter;
|
|
filter = NULL;
|
|
return FALSE;
|
|
}
|
|
setLimit = ppos.getIndex();
|
|
if (limit < setLimit) {
|
|
limit = ID.indexOf(endDelimiter, setLimit);
|
|
if (limit < 0) {
|
|
if (withinParens) {
|
|
return FALSE;
|
|
}
|
|
limit = ID.length();
|
|
}
|
|
}
|
|
if (revStart >= 0 && revStart < setLimit) {
|
|
revStart = ID.indexOf(CLOSE_PAREN, setLimit);
|
|
}
|
|
} else {
|
|
setStart = setLimit = pos;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* If pos is the index of a space in str, then advance it over that
|
|
* space and any immediately subsequent ones.
|
|
*/
|
|
void Transliterator::skipSpaces(const UnicodeString& str,
|
|
int32_t& pos) {
|
|
while (pos < str.length() &&
|
|
u_isspace(str.charAt(pos))) {
|
|
++pos;
|
|
}
|
|
}
|
|
|
|
// For public consumption
|
|
void Transliterator::registerFactory(const UnicodeString& id,
|
|
Transliterator::Factory factory,
|
|
Transliterator::Token context) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
_registerFactory(id, factory, context);
|
|
}
|
|
|
|
// To be called only by Transliterator subclasses that are called
|
|
// to register themselves by initializeRegistry().
|
|
void Transliterator::_registerFactory(const UnicodeString& id,
|
|
Transliterator::Factory factory,
|
|
Transliterator::Token context) {
|
|
registry->put(id, factory, context, TRUE);
|
|
}
|
|
|
|
/**
|
|
* Registers a instance <tt>obj</tt> of a subclass of
|
|
* <code>Transliterator</code> with the system. This object must
|
|
* implement the <tt>clone()</tt> method. When
|
|
* <tt>getInstance()</tt> is called with an ID string that is
|
|
* equal to <tt>obj.getID()</tt>, then <tt>obj.clone()</tt> is
|
|
* returned.
|
|
*
|
|
* @param obj an instance of subclass of
|
|
* <code>Transliterator</code> that defines <tt>clone()</tt>
|
|
* @see #getInstance
|
|
* @see #unregister
|
|
*/
|
|
void Transliterator::registerInstance(Transliterator* adoptedPrototype) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
registry->put(adoptedPrototype, TRUE);
|
|
}
|
|
|
|
/**
|
|
* Unregisters a transliterator or class. This may be either
|
|
* a system transliterator or a user transliterator or class.
|
|
*
|
|
* @param ID the ID of the transliterator or class
|
|
* @see #registerInstance
|
|
|
|
*/
|
|
void Transliterator::unregister(const UnicodeString& ID) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
registry->remove(ID);
|
|
}
|
|
|
|
/**
|
|
* Return the number of IDs currently registered with the system.
|
|
* To retrieve the actual IDs, call getAvailableID(i) with
|
|
* i from 0 to countAvailableIDs() - 1.
|
|
*/
|
|
int32_t Transliterator::countAvailableIDs(void) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->countAvailableIDs();
|
|
}
|
|
|
|
/**
|
|
* Return the index-th available ID. index must be between 0
|
|
* and countAvailableIDs() - 1, inclusive. If index is out of
|
|
* range, the result of getAvailableID(0) is returned.
|
|
*/
|
|
const UnicodeString& Transliterator::getAvailableID(int32_t index) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->getAvailableID(index);
|
|
}
|
|
|
|
int32_t Transliterator::countAvailableSources(void) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->countAvailableSources();
|
|
}
|
|
|
|
UnicodeString& Transliterator::getAvailableSource(int32_t index,
|
|
UnicodeString& result) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->getAvailableSource(index, result);
|
|
}
|
|
|
|
int32_t Transliterator::countAvailableTargets(const UnicodeString& source) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->countAvailableTargets(source);
|
|
}
|
|
|
|
UnicodeString& Transliterator::getAvailableTarget(int32_t index,
|
|
const UnicodeString& source,
|
|
UnicodeString& result) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->getAvailableTarget(index, source, result);
|
|
}
|
|
|
|
int32_t Transliterator::countAvailableVariants(const UnicodeString& source,
|
|
const UnicodeString& target) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->countAvailableVariants(source, target);
|
|
}
|
|
|
|
UnicodeString& Transliterator::getAvailableVariant(int32_t index,
|
|
const UnicodeString& source,
|
|
const UnicodeString& target,
|
|
UnicodeString& result) {
|
|
if (registry == 0) {
|
|
initializeRegistry();
|
|
}
|
|
Mutex lock(®istryMutex);
|
|
return registry->getAvailableVariant(index, source, target, result);
|
|
}
|
|
|
|
#ifdef U_USE_DEPRECATED_TRANSLITERATOR_API
|
|
|
|
/**
|
|
* Method for subclasses to use to obtain a character in the given
|
|
* string, with filtering.
|
|
* @deprecated the new architecture provides filtering at the top
|
|
* level. This method will be removed Dec 31 2001.
|
|
*/
|
|
UChar Transliterator::filteredCharAt(const Replaceable& text, int32_t i) const {
|
|
UChar c;
|
|
const UnicodeFilter* localFilter = getFilter();
|
|
return (localFilter == 0) ? text.charAt(i) :
|
|
(localFilter->contains(c = text.charAt(i)) ? c : (UChar)0xFFFE);
|
|
}
|
|
|
|
#endif
|
|
|
|
void Transliterator::initializeRegistry(void) {
|
|
// Lock first, check registry pointer second
|
|
Mutex lock(®istryMutex);
|
|
if (registry != 0) {
|
|
// We were blocked by another thread in initializeRegistry()
|
|
return;
|
|
}
|
|
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
|
|
registry = new TransliteratorRegistry(status);
|
|
if (registry == 0 || U_FAILURE(status)) {
|
|
return; // out of memory, no recovery
|
|
}
|
|
|
|
/* The following code parses the index table located in
|
|
* icu/data/translit_index.txt. The index is an n x 4 table
|
|
* that follows this format:
|
|
*
|
|
* <id>:file:<resource>:<direction>
|
|
* <id>:internal:<resource>:<direction>
|
|
* <id>:alias:<getInstanceArg>:
|
|
*
|
|
* <id> is the ID of the system transliterator being defined. These
|
|
* are public IDs enumerated by Transliterator.getAvailableIDs(),
|
|
* unless the second field is "internal".
|
|
*
|
|
* <resource> is a ResourceReader resource name. Currently these refer
|
|
* to file names under com/ibm/text/resources. This string is passed
|
|
* directly to ResourceReader, together with <encoding>.
|
|
*
|
|
* <direction> is either "FORWARD" or "REVERSE".
|
|
*
|
|
* <getInstanceArg> is a string to be passed directly to
|
|
* Transliterator.getInstance(). The returned Transliterator object
|
|
* then has its ID changed to <id> and is returned.
|
|
*
|
|
* The extra blank field on "alias" lines is to make the array square.
|
|
*/
|
|
static const char translit_index[] = "translit_index";
|
|
|
|
UResourceBundle *bundle, *transIDs, *colBund;
|
|
bundle = ures_openDirect(0, translit_index, &status);
|
|
transIDs = ures_getByKey(bundle, RB_RULE_BASED_IDS, 0, &status);
|
|
|
|
int32_t row, maxRows;
|
|
if (U_SUCCESS(status)) {
|
|
maxRows = ures_getSize(transIDs);
|
|
for (row = 0; row < maxRows; row++) {
|
|
colBund = ures_getByIndex(transIDs, row, 0, &status);
|
|
|
|
if (U_SUCCESS(status) && ures_getSize(colBund) == 4) {
|
|
UnicodeString id = ures_getUnicodeStringByIndex(colBund, 0, &status);
|
|
UChar type = ures_getUnicodeStringByIndex(colBund, 1, &status).charAt(0);
|
|
UnicodeString resString = ures_getUnicodeStringByIndex(colBund, 2, &status);
|
|
|
|
if (U_SUCCESS(status)) {
|
|
switch (type) {
|
|
case 0x66: // 'f'
|
|
case 0x69: // 'i'
|
|
// 'file' or 'internal';
|
|
// row[2]=resource, row[3]=direction
|
|
{
|
|
UBool visible = (type == 0x0066 /*f*/);
|
|
UTransDirection dir =
|
|
(ures_getUnicodeStringByIndex(colBund, 3, &status).charAt(0) ==
|
|
0x0046 /*F*/) ?
|
|
UTRANS_FORWARD : UTRANS_REVERSE;
|
|
registry->put(id, resString, dir, visible);
|
|
}
|
|
break;
|
|
case 0x61: // 'a'
|
|
// 'alias'; row[2]=createInstance argument
|
|
registry->put(id, resString, TRUE);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ures_close(colBund);
|
|
}
|
|
}
|
|
|
|
ures_close(transIDs);
|
|
ures_close(bundle);
|
|
|
|
// Manually add prototypes that the system knows about to the
|
|
// cache. This is how new non-rule-based transliterators are
|
|
// added to the system.
|
|
|
|
registry->put(new HexToUnicodeTransliterator(), TRUE);
|
|
registry->put(new UnicodeToHexTransliterator(), TRUE);
|
|
registry->put(new NullTransliterator(), TRUE);
|
|
registry->put(new RemoveTransliterator(), TRUE);
|
|
registry->put(new LowercaseTransliterator(), TRUE);
|
|
registry->put(new UppercaseTransliterator(), TRUE);
|
|
registry->put(new TitlecaseTransliterator(), TRUE);
|
|
registry->put(new UnicodeNameTransliterator(), TRUE);
|
|
registry->put(new NameUnicodeTransliterator(), TRUE);
|
|
NormalizationTransliterator::registerIDs();
|
|
ucln_i18n_registerCleanup();
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
// Defined in ucln_in.h:
|
|
|
|
/**
|
|
* Release all static memory held by transliterator. This will
|
|
* necessarily invalidate any rule-based transliterators held by the
|
|
* user, because RBTs hold pointers to common data objects.
|
|
*/
|
|
U_CFUNC UBool transliterator_cleanup(void) {
|
|
TitlecaseTransliterator::cleanup();
|
|
delete registry;
|
|
registry = 0;
|
|
umtx_destroy(®istryMutex);
|
|
return TRUE;
|
|
}
|
|
|
|
//eof
|
|
|