| /* |
| ********************************************************************** |
| * Copyright (C) 1999-2009, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ********************************************************************** |
| * Date Name Description |
| * 11/17/99 aliu Creation. |
| ********************************************************************** |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_TRANSLITERATION |
| |
| #include "unicode/putil.h" |
| #include "unicode/translit.h" |
| #include "unicode/locid.h" |
| #include "unicode/msgfmt.h" |
| #include "unicode/rep.h" |
| #include "unicode/resbund.h" |
| #include "unicode/unifilt.h" |
| #include "unicode/uniset.h" |
| #include "unicode/uscript.h" |
| #include "unicode/strenum.h" |
| #include "cpdtrans.h" |
| #include "nultrans.h" |
| #include "rbt_data.h" |
| #include "rbt_pars.h" |
| #include "rbt.h" |
| #include "transreg.h" |
| #include "name2uni.h" |
| #include "nortrans.h" |
| #include "remtrans.h" |
| #include "titletrn.h" |
| #include "tolowtrn.h" |
| #include "toupptrn.h" |
| #include "uni2name.h" |
| #include "brktrans.h" |
| #include "esctrn.h" |
| #include "unesctrn.h" |
| #include "tridpars.h" |
| #include "anytrans.h" |
| #include "util.h" |
| #include "hash.h" |
| #include "mutex.h" |
| #include "ucln_in.h" |
| #include "uassert.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| #include "uinvchar.h" |
| |
| static const UChar TARGET_SEP = 0x002D; /*-*/ |
| static const UChar ID_DELIM = 0x003B; /*;*/ |
| static const UChar VARIANT_SEP = 0x002F; // '/' |
| |
| /** |
| * 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 U_NAMESPACE_QUALIFIER TransliteratorRegistry* registry = 0; |
| |
| // Macro to check/initialize the registry. ONLY USE WITHIN |
| // MUTEX. Avoids function call when registry is initialized. |
| #define HAVE_REGISTRY(status) (registry!=0 || initializeRegistry(status)) |
| |
| // Empty string |
| static const UChar EMPTY[] = {0}; //"" |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(Transliterator) |
| |
| /** |
| * Return TRUE if the given UTransPosition is valid for text of |
| * the given length. |
| */ |
| static inline UBool positionIsValid(UTransPosition& index, int32_t len) { |
| return !(index.contextStart < 0 || |
| index.start < index.contextStart || |
| index.limit < index.start || |
| index.contextLimit < index.limit || |
| len < index.contextLimit); |
| } |
| |
| /** |
| * 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) : |
| UObject(), ID(theID), filter(adoptedFilter), |
| maximumContextLength(0) |
| { |
| // NUL-terminate the ID string, which is a non-aliased copy. |
| ID.append((UChar)0); |
| ID.truncate(ID.length()-1); |
| } |
| |
| /** |
| * Destructor. |
| */ |
| Transliterator::~Transliterator() { |
| if (filter) { |
| delete filter; |
| } |
| } |
| |
| /** |
| * Copy constructor. |
| */ |
| Transliterator::Transliterator(const Transliterator& other) : |
| UObject(other), ID(other.ID), filter(0), |
| maximumContextLength(other.maximumContextLength) |
| { |
| // NUL-terminate the ID string, which is a non-aliased copy. |
| ID.append((UChar)0); |
| ID.truncate(ID.length()-1); |
| |
| if (other.filter != 0) { |
| // We own the filter, so we must have our own copy |
| filter = (UnicodeFilter*) other.filter->clone(); |
| } |
| } |
| |
| Transliterator* Transliterator::clone() const { |
| return NULL; |
| } |
| |
| /** |
| * Assignment operator. |
| */ |
| Transliterator& Transliterator::operator=(const Transliterator& other) { |
| ID = other.ID; |
| // NUL-terminate the ID string |
| ID.getTerminatedBuffer(); |
| |
| 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, or -1 |
| */ |
| int32_t Transliterator::transliterate(Replaceable& text, |
| int32_t start, int32_t limit) const { |
| if (start < 0 || |
| limit < start || |
| text.length() < limit) { |
| return -1; |
| } |
| |
| UTransPosition offsets; |
| offsets.contextStart= start; |
| offsets.contextLimit = limit; |
| offsets.start = start; |
| offsets.limit = limit; |
| filteredTransliterate(text, offsets, FALSE, TRUE); |
| 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 { |
| if (!positionIsValid(index, text.length())) { |
| return; |
| } |
| |
| filteredTransliterate(text, index, FALSE, TRUE); |
| } |
| |
| /** |
| * 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 (!positionIsValid(index, text.length())) { |
| 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, TRUE); |
| |
| #if 0 |
| // TODO |
| // 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, |
| UBool rollback) const { |
| // Short circuit path for transliterators with no filter in |
| // non-incremental mode. |
| if (filter == 0 && !rollback) { |
| handleTransliterate(text, index, incremental); |
| return; |
| } |
| |
| //---------------------------------------------------------------------- |
| // This method processes text in two groupings: |
| // |
| // RUNS -- A run is a contiguous group of characters which are contained |
| // in the filter for this transliterator (filter.contains(ch) == TRUE). |
| // Text outside of runs may appear as context but it is not modified. |
| // The start and limit Position values are narrowed to each run. |
| // |
| // PASSES (incremental only) -- To make incremental mode work correctly, |
| // each run is broken up into n passes, where n is the length (in code |
| // points) of the run. Each pass contains the first n characters. If a |
| // pass is completely transliterated, it is committed, and further passes |
| // include characters after the committed text. If a pass is blocked, |
| // and does not transliterate completely, then this method rolls back |
| // the changes made during the pass, extends the pass by one code point, |
| // and tries again. |
| //---------------------------------------------------------------------- |
| |
| // 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; |
| |
| // If there is a non-null filter, then break the input text up. Say the |
| // input text has the form: |
| // xxxabcxxdefxx |
| // where 'x' represents a filtered character (filter.contains('x') == |
| // false). 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). |
| |
| for (;;) { |
| |
| if (filter != NULL) { |
| // Narrow the range to be transliterated to the first segment |
| // of unfiltered characters at or after index.start. |
| |
| // Advance past filtered chars |
| UChar32 c; |
| 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; |
| } |
| |
| // Is this run 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 run. |
| UBool isIncrementalRun = |
| (index.limit < globalLimit ? FALSE : incremental); |
| |
| int32_t delta; |
| |
| // 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. |
| // |
| // To handle this, when in incremental mode we supply characters to |
| // handleTransliterate() in several passes. Each pass adds one more |
| // input character to the input text. That is, for input "ABCD", we |
| // first try "A", then "AB", then "ABC", and finally "ABCD". If at |
| // any point we block (upon return, start < limit) then we roll |
| // back. If at any point we complete the run (upon return start == |
| // limit) then we commit that run. |
| |
| if (rollback && isIncrementalRun) { |
| |
| int32_t runStart = index.start; |
| int32_t runLimit = index.limit; |
| int32_t runLength = runLimit - runStart; |
| |
| // Make a rollback copy at the end of the string |
| int32_t rollbackOrigin = text.length(); |
| text.copy(runStart, runLimit, rollbackOrigin); |
| |
| // Variables reflecting the commitment of completely |
| // transliterated text. passStart is the runStart, advanced |
| // past committed text. rollbackStart is the rollbackOrigin, |
| // advanced past rollback text that corresponds to committed |
| // text. |
| int32_t passStart = runStart; |
| int32_t rollbackStart = rollbackOrigin; |
| |
| // The limit for each pass; we advance by one code point with |
| // each iteration. |
| int32_t passLimit = index.start; |
| |
| // Total length, in 16-bit code units, of uncommitted text. |
| // This is the length to be rolled back. |
| int32_t uncommittedLength = 0; |
| |
| // Total delta (change in length) for all passes |
| int32_t totalDelta = 0; |
| |
| // PASS MAIN LOOP -- Start with a single character, and extend |
| // the text by one character at a time. Roll back partial |
| // transliterations and commit complete transliterations. |
| for (;;) { |
| // Length of additional code point, either one or two |
| int32_t charLength = |
| UTF_CHAR_LENGTH(text.char32At(passLimit)); |
| passLimit += charLength; |
| if (passLimit > runLimit) { |
| break; |
| } |
| uncommittedLength += charLength; |
| |
| index.limit = passLimit; |
| |
| // Delegate to subclass for actual transliteration. Upon |
| // return, start will be updated to point after the |
| // transliterated text, and limit and contextLimit will be |
| // adjusted for length changes. |
| handleTransliterate(text, index, TRUE); |
| |
| delta = index.limit - passLimit; // change in length |
| |
| // We failed to completely transliterate this pass. |
| // Roll back the text. Indices remain unchanged; reset |
| // them where necessary. |
| if (index.start != index.limit) { |
| // Find the rollbackStart, adjusted for length changes |
| // and the deletion of partially transliterated text. |
| int32_t rs = rollbackStart + delta - (index.limit - passStart); |
| |
| // Delete the partially transliterated text |
| text.handleReplaceBetween(passStart, index.limit, EMPTY); |
| |
| // Copy the rollback text back |
| text.copy(rs, rs + uncommittedLength, passStart); |
| |
| // Restore indices to their original values |
| index.start = passStart; |
| index.limit = passLimit; |
| index.contextLimit -= delta; |
| } |
| |
| // We did completely transliterate this pass. Update the |
| // commit indices to record how far we got. Adjust indices |
| // for length change. |
| else { |
| // Move the pass indices past the committed text. |
| passStart = passLimit = index.start; |
| |
| // Adjust the rollbackStart for length changes and move |
| // it past the committed text. All characters we've |
| // processed to this point are committed now, so zero |
| // out the uncommittedLength. |
| rollbackStart += delta + uncommittedLength; |
| uncommittedLength = 0; |
| |
| // Adjust indices for length changes. |
| runLimit += delta; |
| totalDelta += delta; |
| } |
| } |
| |
| // Adjust overall limit and rollbackOrigin for insertions and |
| // deletions. Don't need to worry about contextLimit because |
| // handleTransliterate() maintains that. |
| rollbackOrigin += totalDelta; |
| globalLimit += totalDelta; |
| |
| // Delete the rollback copy |
| text.handleReplaceBetween(rollbackOrigin, rollbackOrigin + runLength, EMPTY); |
| |
| // Move start past committed text |
| index.start = passStart; |
| } |
| |
| else { |
| // Delegate to subclass for actual transliteration. |
| int32_t limit = index.limit; |
| handleTransliterate(text, index, isIncrementalRun); |
| delta = index.limit - limit; // change in length |
| |
| // In a properly written transliterator, start == limit after |
| // handleTransliterate() returns when incremental is false. |
| // Catch cases where the subclass doesn't do this, and throw |
| // an exception. (Just pinning start to limit is a bad idea, |
| // because what's probably happening is that the subclass |
| // isn't transliterating all the way to the end, and it should |
| // in non-incremental mode.) |
| if (!incremental && index.start != index.limit) { |
| // We can't throw an exception, so just fudge things |
| index.start = index.limit; |
| } |
| |
| // Adjust overall limit for insertions/deletions. Don't need |
| // to worry about contextLimit because handleTransliterate() |
| // maintains that. |
| globalLimit += delta; |
| } |
| |
| if (filter == NULL || isIncrementalRun) { |
| break; |
| } |
| |
| // If we did completely transliterate this |
| // run, then repeat with the next unfiltered run. |
| } |
| |
| // Start is valid where it is. Limit needs to be put back where |
| // it was, modulo adjustments for deletions/insertions. |
| index.limit = globalLimit; |
| } |
| |
| void Transliterator::filteredTransliterate(Replaceable& text, |
| UTransPosition& index, |
| UBool incremental) const { |
| filteredTransliterate(text, index, incremental, FALSE); |
| } |
| |
| /** |
| * 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& U_EXPORT2 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 TARGET_SEP. If there is no TARGET_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& U_EXPORT2 Transliterator::getDisplayName(const UnicodeString& id, |
| const Locale& inLocale, |
| UnicodeString& result) { |
| UErrorCode status = U_ZERO_ERROR; |
| |
| ResourceBundle bundle(U_ICUDATA_TRANSLIT, inLocale, status); |
| |
| // Suspend checking status until later... |
| |
| result.truncate(0); |
| |
| // Normalize the ID |
| UnicodeString source, target, variant; |
| UBool sawSource; |
| TransliteratorIDParser::IDtoSTV(id, source, target, variant, sawSource); |
| if (target.length() < 1) { |
| // No target; malformed id |
| return result; |
| } |
| if (variant.length() > 0) { // Change "Foo" to "/Foo" |
| variant.insert(0, VARIANT_SEP); |
| } |
| UnicodeString ID(source); |
| ID.append(TARGET_SEP).append(target).append(variant); |
| |
| // build the char* key |
| if (uprv_isInvariantUString(ID.getBuffer(), ID.length())) { |
| 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, (int32_t)(sizeof(key)-length), US_INV); |
| |
| // 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 |
| } |
| |
| #if !UCONFIG_NO_FORMATTING |
| // 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 nargs; |
| args[0].setLong(2); // # of args to follow |
| args[1].setString(source); |
| args[2].setString(target); |
| 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<=2; ++j) { |
| status = U_ZERO_ERROR; |
| uprv_strcpy(key, RB_SCRIPT_DISPLAY_NAME_PREFIX); |
| args[j].getString(s); |
| if (uprv_isInvariantUString(s.getBuffer(), s.length())) { |
| s.extract(0, sizeof(key)-length-1, key+length, (int32_t)sizeof(key)-length-1, US_INV); |
| |
| 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)) { |
| result.append(variant); |
| return result; |
| } |
| } |
| #endif |
| } |
| |
| // 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); |
| } |
| |
| Transliterator* U_EXPORT2 |
| Transliterator::createInstance(const UnicodeString& ID, |
| UTransDirection dir, |
| UErrorCode& status) |
| { |
| UParseError parseError; |
| return createInstance(ID, dir, 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* U_EXPORT2 |
| Transliterator::createInstance(const UnicodeString& ID, |
| UTransDirection dir, |
| UParseError& parseError, |
| UErrorCode& status) |
| { |
| if (U_FAILURE(status)) { |
| return 0; |
| } |
| |
| UnicodeString canonID; |
| UVector list(status); |
| if (U_FAILURE(status)) { |
| return NULL; |
| } |
| |
| UnicodeSet* globalFilter; |
| // TODO add code for parseError...currently unused, but |
| // later may be used by parsing code... |
| if (!TransliteratorIDParser::parseCompoundID(ID, dir, canonID, list, globalFilter)) { |
| status = U_INVALID_ID; |
| return NULL; |
| } |
| |
| TransliteratorIDParser::instantiateList(list, status); |
| if (U_FAILURE(status)) { |
| return NULL; |
| } |
| |
| U_ASSERT(list.size() > 0); |
| Transliterator* t = NULL; |
| |
| if (list.size() > 1 || canonID.indexOf(ID_DELIM) >= 0) { |
| // [NOTE: If it's a compoundID, we instantiate a CompoundTransliterator even if it only |
| // has one child transliterator. This is so that toRules() will return the right thing |
| // (without any inactive ID), but our main ID still comes out correct. That is, if we |
| // instantiate "(Lower);Latin-Greek;", we want the rules to come out as "::Latin-Greek;" |
| // even though the ID is "(Lower);Latin-Greek;". |
| t = new CompoundTransliterator(list, parseError, status); |
| } |
| else { |
| t = (Transliterator*)list.elementAt(0); |
| } |
| // Check null pointer |
| if (t != NULL) { |
| t->setID(canonID); |
| if (globalFilter != NULL) { |
| t->adoptFilter(globalFilter); |
| } |
| } |
| else if (U_SUCCESS(status)) { |
| status = U_MEMORY_ALLOCATION_ERROR; |
| } |
| return t; |
| } |
| |
| /** |
| * Create a transliterator from a basic ID. This is an ID |
| * containing only the forward direction source, target, and |
| * variant. |
| * @param id a basic ID of the form S-T or S-T/V. |
| * @return a newly created Transliterator or null if the ID is |
| * invalid. |
| */ |
| Transliterator* Transliterator::createBasicInstance(const UnicodeString& id, |
| const UnicodeString* canon) { |
| UParseError pe; |
| UErrorCode ec = U_ZERO_ERROR; |
| TransliteratorAlias* alias = 0; |
| Transliterator* t = 0; |
| |
| umtx_lock(®istryMutex); |
| if (HAVE_REGISTRY(ec)) { |
| t = registry->get(id, alias, ec); |
| } |
| umtx_unlock(®istryMutex); |
| |
| if (U_FAILURE(ec)) { |
| delete t; |
| delete alias; |
| return 0; |
| } |
| |
| // We may have not gotten a transliterator: Because we can't |
| // instantiate a transliterator from inside TransliteratorRegistry:: |
| // get() (that would deadlock), we sometimes pass back an alias. This |
| // contains the data we need to finish the instantiation outside the |
| // registry mutex. The alias may, in turn, generate another alias, so |
| // we handle aliases in a loop. The max times through the loop is two. |
| // [alan] |
| while (alias != 0) { |
| U_ASSERT(t==0); |
| // Rule-based aliases are handled with TransliteratorAlias:: |
| // parse(), followed by TransliteratorRegistry::reget(). |
| // Other aliases are handled with TransliteratorAlias::create(). |
| if (alias->isRuleBased()) { |
| // Step 1. parse |
| TransliteratorParser parser(ec); |
| alias->parse(parser, pe, ec); |
| delete alias; |
| alias = 0; |
| |
| // Step 2. reget |
| umtx_lock(®istryMutex); |
| if (HAVE_REGISTRY(ec)) { |
| t = registry->reget(id, parser, alias, ec); |
| } |
| umtx_unlock(®istryMutex); |
| |
| // Step 3. Loop back around! |
| } else { |
| t = alias->create(pe, ec); |
| delete alias; |
| alias = 0; |
| break; |
| } |
| if (U_FAILURE(ec)) { |
| delete t; |
| delete alias; |
| t = NULL; |
| break; |
| } |
| } |
| |
| if (t != NULL && canon != NULL) { |
| t->setID(*canon); |
| } |
| |
| 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* U_EXPORT2 |
| Transliterator::createFromRules(const UnicodeString& ID, |
| const UnicodeString& rules, |
| UTransDirection dir, |
| UParseError& parseError, |
| UErrorCode& status) |
| { |
| Transliterator* t = NULL; |
| |
| TransliteratorParser parser(status); |
| parser.parse(rules, dir, parseError, status); |
| |
| if (U_FAILURE(status)) { |
| return 0; |
| } |
| |
| // NOTE: The logic here matches that in TransliteratorRegistry. |
| if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 0) { |
| t = new NullTransliterator(); |
| } |
| else if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 1) { |
| t = new RuleBasedTransliterator(ID, (TransliterationRuleData*)parser.dataVector.orphanElementAt(0), TRUE); |
| } |
| else if (parser.idBlockVector.size() == 1 && parser.dataVector.size() == 0) { |
| // 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. |
| if (parser.compoundFilter != NULL) { |
| UnicodeString filterPattern; |
| parser.compoundFilter->toPattern(filterPattern, FALSE); |
| t = createInstance(filterPattern + UnicodeString(ID_DELIM) |
| + *((UnicodeString*)parser.idBlockVector.elementAt(0)), UTRANS_FORWARD, parseError, status); |
| } |
| else |
| t = createInstance(*((UnicodeString*)parser.idBlockVector.elementAt(0)), UTRANS_FORWARD, parseError, status); |
| |
| |
| if (t != NULL) { |
| t->setID(ID); |
| } |
| } |
| else { |
| UVector transliterators(status); |
| int32_t passNumber = 1; |
| |
| int32_t limit = parser.idBlockVector.size(); |
| if (parser.dataVector.size() > limit) |
| limit = parser.dataVector.size(); |
| |
| for (int32_t i = 0; i < limit; i++) { |
| if (i < parser.idBlockVector.size()) { |
| UnicodeString* idBlock = (UnicodeString*)parser.idBlockVector.elementAt(i); |
| if (!idBlock->isEmpty()) { |
| Transliterator* temp = createInstance(*idBlock, UTRANS_FORWARD, parseError, status); |
| if (temp != NULL && temp->getDynamicClassID() != NullTransliterator::getStaticClassID()) |
| transliterators.addElement(temp, status); |
| else |
| delete temp; |
| } |
| } |
| if (!parser.dataVector.isEmpty()) { |
| TransliterationRuleData* data = (TransliterationRuleData*)parser.dataVector.orphanElementAt(0); |
| RuleBasedTransliterator* temprbt = new RuleBasedTransliterator(UnicodeString(CompoundTransliterator::PASS_STRING) + (passNumber++), |
| data, TRUE); |
| // Check if NULL before adding it to transliterators to avoid future usage of NULL pointer. |
| if (temprbt == NULL) { |
| status = U_MEMORY_ALLOCATION_ERROR; |
| return t; |
| } |
| transliterators.addElement(temprbt, status); |
| } |
| } |
| |
| t = new CompoundTransliterator(transliterators, passNumber - 1, parseError, status); |
| // Null pointer check |
| if (t != NULL) { |
| t->setID(ID); |
| t->adoptFilter(parser.orphanCompoundFilter()); |
| } |
| } |
| if (U_SUCCESS(status) && t == NULL) { |
| status = U_MEMORY_ALLOCATION_ERROR; |
| } |
| 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 |
| if (escapeUnprintable) { |
| rulesSource.truncate(0); |
| UnicodeString id = getID(); |
| for (int32_t i=0; i<id.length();) { |
| UChar32 c = id.char32At(i); |
| if (!ICU_Utility::escapeUnprintable(rulesSource, c)) { |
| rulesSource.append(c); |
| } |
| i += UTF_CHAR_LENGTH(c); |
| } |
| } else { |
| rulesSource = getID(); |
| } |
| // KEEP in sync with rbt_pars |
| rulesSource.insert(0, UNICODE_STRING_SIMPLE("::")); |
| rulesSource.append(ID_DELIM); |
| return rulesSource; |
| } |
| |
| int32_t Transliterator::countElements() const { |
| return (this->getDynamicClassID() == |
| CompoundTransliterator::getStaticClassID()) ? |
| ((const CompoundTransliterator*) this)->getCount() : 0; |
| } |
| |
| const Transliterator& Transliterator::getElement(int32_t index, UErrorCode& ec) const { |
| if (U_FAILURE(ec)) { |
| return *this; |
| } |
| const CompoundTransliterator* cpd = |
| (this->getDynamicClassID() == CompoundTransliterator::getStaticClassID()) ? |
| (const CompoundTransliterator*) this : 0; |
| int32_t n = (cpd == NULL) ? 1 : cpd->getCount(); |
| if (index < 0 || index >= n) { |
| ec = U_INDEX_OUTOFBOUNDS_ERROR; |
| return *this; |
| } else { |
| return (n == 1) ? *this : cpd->getTransliterator(index); |
| } |
| } |
| |
| UnicodeSet& Transliterator::getSourceSet(UnicodeSet& result) const { |
| handleGetSourceSet(result); |
| if (filter != NULL) { |
| UnicodeSet* filterSet; |
| UBool deleteFilterSet = FALSE; |
| // Most, but not all filters will be UnicodeSets. Optimize for |
| // the high-runner case. |
| if (filter->getDynamicClassID() == UnicodeSet::getStaticClassID()) { |
| filterSet = (UnicodeSet*) filter; |
| } else { |
| filterSet = new UnicodeSet(); |
| // Check null pointer |
| if (filterSet == NULL) { |
| return result; |
| } |
| deleteFilterSet = TRUE; |
| filter->addMatchSetTo(*filterSet); |
| } |
| result.retainAll(*filterSet); |
| if (deleteFilterSet) { |
| delete filterSet; |
| } |
| } |
| return result; |
| } |
| |
| void Transliterator::handleGetSourceSet(UnicodeSet& result) const { |
| result.clear(); |
| } |
| |
| UnicodeSet& Transliterator::getTargetSet(UnicodeSet& result) const { |
| return result.clear(); |
| } |
| |
| // For public consumption |
| void U_EXPORT2 Transliterator::registerFactory(const UnicodeString& id, |
| Transliterator::Factory factory, |
| Transliterator::Token context) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _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) { |
| UErrorCode ec = U_ZERO_ERROR; |
| registry->put(id, factory, context, TRUE, ec); |
| } |
| |
| // To be called only by Transliterator subclasses that are called |
| // to register themselves by initializeRegistry(). |
| void Transliterator::_registerSpecialInverse(const UnicodeString& target, |
| const UnicodeString& inverseTarget, |
| UBool bidirectional) { |
| UErrorCode status = U_ZERO_ERROR; |
| TransliteratorIDParser::registerSpecialInverse(target, inverseTarget, bidirectional, status); |
| } |
| |
| /** |
| * 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 U_EXPORT2 Transliterator::registerInstance(Transliterator* adoptedPrototype) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _registerInstance(adoptedPrototype); |
| } |
| } |
| |
| void Transliterator::_registerInstance(Transliterator* adoptedPrototype) { |
| UErrorCode ec = U_ZERO_ERROR; |
| registry->put(adoptedPrototype, TRUE, ec); |
| } |
| |
| void U_EXPORT2 Transliterator::registerAlias(const UnicodeString& aliasID, |
| const UnicodeString& realID) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _registerAlias(aliasID, realID); |
| } |
| } |
| |
| void Transliterator::_registerAlias(const UnicodeString& aliasID, |
| const UnicodeString& realID) { |
| UErrorCode ec = U_ZERO_ERROR; |
| registry->put(aliasID, realID, FALSE, TRUE, ec); |
| } |
| |
| /** |
| * 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 U_EXPORT2 Transliterator::unregister(const UnicodeString& ID) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| registry->remove(ID); |
| } |
| } |
| |
| /** |
| * == OBSOLETE - remove in ICU 3.4 == |
| * 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 U_EXPORT2 Transliterator::countAvailableIDs(void) { |
| int32_t retVal = 0; |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| retVal = registry->countAvailableIDs(); |
| } |
| return retVal; |
| } |
| |
| /** |
| * == OBSOLETE - remove in ICU 3.4 == |
| * 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& U_EXPORT2 Transliterator::getAvailableID(int32_t index) { |
| const UnicodeString* result = NULL; |
| umtx_lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| result = ®istry->getAvailableID(index); |
| } |
| umtx_unlock(®istryMutex); |
| U_ASSERT(result != NULL); // fail if no registry |
| return *result; |
| } |
| |
| StringEnumeration* U_EXPORT2 Transliterator::getAvailableIDs(UErrorCode& ec) { |
| if (U_FAILURE(ec)) return NULL; |
| StringEnumeration* result = NULL; |
| umtx_lock(®istryMutex); |
| if (HAVE_REGISTRY(ec)) { |
| result = registry->getAvailableIDs(); |
| } |
| umtx_unlock(®istryMutex); |
| if (result == NULL) { |
| ec = U_INTERNAL_TRANSLITERATOR_ERROR; |
| } |
| return result; |
| } |
| |
| int32_t U_EXPORT2 Transliterator::countAvailableSources(void) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| return HAVE_REGISTRY(ec) ? _countAvailableSources() : 0; |
| } |
| |
| UnicodeString& U_EXPORT2 Transliterator::getAvailableSource(int32_t index, |
| UnicodeString& result) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _getAvailableSource(index, result); |
| } |
| return result; |
| } |
| |
| int32_t U_EXPORT2 Transliterator::countAvailableTargets(const UnicodeString& source) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| return HAVE_REGISTRY(ec) ? _countAvailableTargets(source) : 0; |
| } |
| |
| UnicodeString& U_EXPORT2 Transliterator::getAvailableTarget(int32_t index, |
| const UnicodeString& source, |
| UnicodeString& result) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _getAvailableTarget(index, source, result); |
| } |
| return result; |
| } |
| |
| int32_t U_EXPORT2 Transliterator::countAvailableVariants(const UnicodeString& source, |
| const UnicodeString& target) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| return HAVE_REGISTRY(ec) ? _countAvailableVariants(source, target) : 0; |
| } |
| |
| UnicodeString& U_EXPORT2 Transliterator::getAvailableVariant(int32_t index, |
| const UnicodeString& source, |
| const UnicodeString& target, |
| UnicodeString& result) { |
| Mutex lock(®istryMutex); |
| UErrorCode ec = U_ZERO_ERROR; |
| if (HAVE_REGISTRY(ec)) { |
| _getAvailableVariant(index, source, target, result); |
| } |
| return result; |
| } |
| |
| int32_t Transliterator::_countAvailableSources(void) { |
| return registry->countAvailableSources(); |
| } |
| |
| UnicodeString& Transliterator::_getAvailableSource(int32_t index, |
| UnicodeString& result) { |
| return registry->getAvailableSource(index, result); |
| } |
| |
| int32_t Transliterator::_countAvailableTargets(const UnicodeString& source) { |
| return registry->countAvailableTargets(source); |
| } |
| |
| UnicodeString& Transliterator::_getAvailableTarget(int32_t index, |
| const UnicodeString& source, |
| UnicodeString& result) { |
| return registry->getAvailableTarget(index, source, result); |
| } |
| |
| int32_t Transliterator::_countAvailableVariants(const UnicodeString& source, |
| const UnicodeString& target) { |
| return registry->countAvailableVariants(source, target); |
| } |
| |
| UnicodeString& Transliterator::_getAvailableVariant(int32_t index, |
| const UnicodeString& source, |
| const UnicodeString& target, |
| UnicodeString& result) { |
| 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 |
| |
| /** |
| * If the registry is initialized, return TRUE. If not, initialize it |
| * and return TRUE. If the registry cannot be initialized, return |
| * FALSE (rare). |
| * |
| * IMPORTANT: Upon entry, registryMutex must be LOCKED. The entire |
| * initialization is done with the lock held. There is NO REASON to |
| * unlock, since no other thread that is waiting on the registryMutex |
| * cannot itself proceed until the registry is initialized. |
| */ |
| UBool Transliterator::initializeRegistry(UErrorCode &status) { |
| if (registry != 0) { |
| return TRUE; |
| } |
| |
| registry = new TransliteratorRegistry(status); |
| if (registry == 0 || U_FAILURE(status)) { |
| delete registry; |
| registry = 0; |
| return FALSE; // can't create registry, no recovery |
| } |
| |
| /* The following code parses the index table located in |
| * icu/data/translit/root.txt. The index is an n x 4 table |
| * that follows this format: |
| * <id>{ |
| * file{ |
| * resource{"<resource>"} |
| * direction{"<direction>"} |
| * } |
| * } |
| * <id>{ |
| * internal{ |
| * resource{"<resource>"} |
| * direction{"<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_open(U_ICUDATA_TRANSLIT, NULL/*open default locale*/, &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)) { |
| UnicodeString id(ures_getKey(colBund), -1, US_INV); |
| UResourceBundle* res = ures_getNextResource(colBund, NULL, &status); |
| const char* typeStr = ures_getKey(res); |
| UChar type; |
| u_charsToUChars(typeStr, &type, 1); |
| |
| if (U_SUCCESS(status)) { |
| int32_t len = 0; |
| const UChar *resString; |
| switch (type) { |
| case 0x66: // 'f' |
| case 0x69: // 'i' |
| // 'file' or 'internal'; |
| // row[2]=resource, row[3]=direction |
| { |
| |
| resString = ures_getStringByKey(res, "resource", &len, &status); |
| UBool visible = (type == 0x0066 /*f*/); |
| UTransDirection dir = |
| (ures_getUnicodeStringByKey(res, "direction", &status).charAt(0) == |
| 0x0046 /*F*/) ? |
| UTRANS_FORWARD : UTRANS_REVERSE; |
| registry->put(id, UnicodeString(TRUE, resString, len), dir, TRUE, visible, status); |
| } |
| break; |
| case 0x61: // 'a' |
| // 'alias'; row[2]=createInstance argument |
| resString = ures_getString(res, &len, &status); |
| registry->put(id, UnicodeString(TRUE, resString, len), TRUE, TRUE, status); |
| break; |
| } |
| } |
| ures_close(res); |
| } |
| 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. |
| |
| // This is to allow for null pointer check |
| NullTransliterator* tempNullTranslit = new NullTransliterator(); |
| LowercaseTransliterator* tempLowercaseTranslit = new LowercaseTransliterator(); |
| UppercaseTransliterator* tempUppercaseTranslit = new UppercaseTransliterator(); |
| TitlecaseTransliterator* tempTitlecaseTranslit = new TitlecaseTransliterator(); |
| UnicodeNameTransliterator* tempUnicodeTranslit = new UnicodeNameTransliterator(); |
| NameUnicodeTransliterator* tempNameUnicodeTranslit = new NameUnicodeTransliterator(); |
| #if !UCONFIG_NO_BREAK_ITERATION |
| // TODO: could or should these transliterators be referenced polymorphically once constructed? |
| BreakTransliterator* tempBreakTranslit = new BreakTransliterator(); |
| #endif |
| // Check for null pointers |
| if (tempNullTranslit == NULL || tempLowercaseTranslit == NULL || tempUppercaseTranslit == NULL || |
| tempTitlecaseTranslit == NULL || tempUnicodeTranslit == NULL || |
| #if !UCONFIG_NO_BREAK_ITERATION |
| tempBreakTranslit == NULL || |
| #endif |
| tempNameUnicodeTranslit == NULL ) |
| { |
| delete tempNullTranslit; |
| delete tempLowercaseTranslit; |
| delete tempUppercaseTranslit; |
| delete tempTitlecaseTranslit; |
| delete tempUnicodeTranslit; |
| delete tempNameUnicodeTranslit; |
| #if !UCONFIG_NO_BREAK_ITERATION |
| delete tempBreakTranslit; |
| #endif |
| // Since there was an error, remove registry |
| delete registry; |
| registry = NULL; |
| |
| status = U_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| registry->put(tempNullTranslit, TRUE, status); |
| registry->put(tempLowercaseTranslit, TRUE, status); |
| registry->put(tempUppercaseTranslit, TRUE, status); |
| registry->put(tempTitlecaseTranslit, TRUE, status); |
| registry->put(tempUnicodeTranslit, TRUE, status); |
| registry->put(tempNameUnicodeTranslit, TRUE, status); |
| #if !UCONFIG_NO_BREAK_ITERATION |
| registry->put(tempBreakTranslit, FALSE, status); // FALSE means invisible. |
| #endif |
| |
| RemoveTransliterator::registerIDs(); // Must be within mutex |
| EscapeTransliterator::registerIDs(); |
| UnescapeTransliterator::registerIDs(); |
| NormalizationTransliterator::registerIDs(); |
| AnyTransliterator::registerIDs(); |
| |
| _registerSpecialInverse(UNICODE_STRING_SIMPLE("Null"), |
| UNICODE_STRING_SIMPLE("Null"), FALSE); |
| _registerSpecialInverse(UNICODE_STRING_SIMPLE("Upper"), |
| UNICODE_STRING_SIMPLE("Lower"), TRUE); |
| _registerSpecialInverse(UNICODE_STRING_SIMPLE("Title"), |
| UNICODE_STRING_SIMPLE("Lower"), FALSE); |
| |
| ucln_i18n_registerCleanup(UCLN_I18N_TRANSLITERATOR, utrans_transliterator_cleanup); |
| |
| return TRUE; |
| } |
| |
| 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 utrans_transliterator_cleanup(void) { |
| U_NAMESPACE_USE |
| TransliteratorIDParser::cleanup(); |
| if (registry) { |
| delete registry; |
| registry = NULL; |
| } |
| umtx_destroy(®istryMutex); |
| return TRUE; |
| } |
| |
| #endif /* #if !UCONFIG_NO_TRANSLITERATION */ |
| |
| //eof |