001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.tools;
003
004import java.io.BufferedInputStream;
005import java.io.File;
006import java.io.IOException;
007import java.io.InputStream;
008import java.lang.annotation.Retention;
009import java.lang.annotation.RetentionPolicy;
010import java.net.URL;
011import java.nio.charset.StandardCharsets;
012import java.nio.file.InvalidPathException;
013import java.text.MessageFormat;
014import java.util.ArrayList;
015import java.util.Arrays;
016import java.util.Collection;
017import java.util.Comparator;
018import java.util.HashMap;
019import java.util.Locale;
020import java.util.Map;
021import java.util.zip.ZipEntry;
022import java.util.zip.ZipFile;
023
024/**
025 * Internationalisation support.
026 *
027 * @author Immanuel.Scholz
028 */
029public final class I18n {
030
031    /**
032     * This annotates strings which do not permit a clean i18n. This is mostly due to strings
033     * containing two nouns which can occur in singular or plural form.
034     * <br>
035     * No behaviour is associated with this annotation.
036     */
037    @Retention(RetentionPolicy.SOURCE)
038    public @interface QuirkyPluralString {
039    }
040
041    private I18n() {
042        // Hide default constructor for utils classes
043    }
044
045    /**
046     * Enumeration of possible plural modes. It allows us to identify and implement logical conditions of
047     * plural forms defined on <a href="https://help.launchpad.net/Translations/PluralForms">Launchpad</a>.
048     * See <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html">CLDR</a>
049     * for another complete list.
050     * @see #pluralEval
051     */
052    private enum PluralMode {
053        /** Plural = Not 1. This is the default for many languages, including English: 1 day, but 0 days or 2 days. */
054        MODE_NOTONE,
055        /** No plural. Mainly for Asian languages (Indonesian, Chinese, Japanese, ...) */
056        MODE_NONE,
057        /** Plural = Greater than 1. For some latin languages (French, Brazilian Portuguese) */
058        MODE_GREATERONE,
059        /* Special mode for
060         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ar">Arabic</a>.*
061        MODE_AR,*/
062        /** Special mode for
063         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#cs">Czech</a>. */
064        MODE_CS,
065        /** Special mode for
066         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#pl">Polish</a>. */
067        MODE_PL,
068        /* Special mode for
069         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ro">Romanian</a>.*
070        MODE_RO,*/
071        /** Special mode for
072         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#lt">Lithuanian</a>. */
073        MODE_LT,
074        /** Special mode for
075         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ru">Russian</a>. */
076        MODE_RU,
077        /** Special mode for
078         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#sk">Slovak</a>. */
079        MODE_SK,
080        /* Special mode for
081         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#sl">Slovenian</a>.*
082        MODE_SL,*/
083    }
084
085    private static volatile PluralMode pluralMode = PluralMode.MODE_NOTONE; /* english default */
086    private static volatile String loadedCode = "en";
087
088
089    private static volatile Map<String, String> strings;
090    private static volatile Map<String, String[]> pstrings;
091    private static Map<String, PluralMode> languages = new HashMap<>();
092    static {
093        //languages.put("ar", PluralMode.MODE_AR);
094        languages.put("ast", PluralMode.MODE_NOTONE);
095        languages.put("bg", PluralMode.MODE_NOTONE);
096        languages.put("be", PluralMode.MODE_RU);
097        languages.put("ca", PluralMode.MODE_NOTONE);
098        languages.put("ca@valencia", PluralMode.MODE_NOTONE);
099        languages.put("cs", PluralMode.MODE_CS);
100        languages.put("da", PluralMode.MODE_NOTONE);
101        languages.put("de", PluralMode.MODE_NOTONE);
102        languages.put("el", PluralMode.MODE_NOTONE);
103        languages.put("en_AU", PluralMode.MODE_NOTONE);
104        languages.put("en_GB", PluralMode.MODE_NOTONE);
105        languages.put("es", PluralMode.MODE_NOTONE);
106        languages.put("et", PluralMode.MODE_NOTONE);
107        //languages.put("eu", PluralMode.MODE_NOTONE);
108        languages.put("fi", PluralMode.MODE_NOTONE);
109        languages.put("fr", PluralMode.MODE_GREATERONE);
110        languages.put("gl", PluralMode.MODE_NOTONE);
111        //languages.put("he", PluralMode.MODE_NOTONE);
112        languages.put("hu", PluralMode.MODE_NOTONE);
113        languages.put("id", PluralMode.MODE_NONE);
114        //languages.put("is", PluralMode.MODE_NOTONE);
115        languages.put("it", PluralMode.MODE_NOTONE);
116        languages.put("ja", PluralMode.MODE_NONE);
117        // fully supported only with Java 8 and later (needs CLDR)
118        languages.put("km", PluralMode.MODE_NONE);
119        languages.put("lt", PluralMode.MODE_LT);
120        languages.put("nb", PluralMode.MODE_NOTONE);
121        languages.put("nl", PluralMode.MODE_NOTONE);
122        languages.put("pl", PluralMode.MODE_PL);
123        languages.put("pt", PluralMode.MODE_NOTONE);
124        languages.put("pt_BR", PluralMode.MODE_GREATERONE);
125        //languages.put("ro", PluralMode.MODE_RO);
126        languages.put("ru", PluralMode.MODE_RU);
127        languages.put("sk", PluralMode.MODE_SK);
128        //languages.put("sl", PluralMode.MODE_SL);
129        languages.put("sv", PluralMode.MODE_NOTONE);
130        //languages.put("tr", PluralMode.MODE_NONE);
131        languages.put("uk", PluralMode.MODE_RU);
132        languages.put("vi", PluralMode.MODE_NONE);
133        languages.put("zh_CN", PluralMode.MODE_NONE);
134        languages.put("zh_TW", PluralMode.MODE_NONE);
135    }
136
137    /**
138     * Translates some text for the current locale.
139     * These strings are collected by a script that runs on the source code files.
140     * After translation, the localizations are distributed with the main program.
141     * <br>
142     * For example, <code>tr("JOSM''s default value is ''{0}''.", val)</code>.
143     * <br>
144     * Use {@link #trn} for distinguishing singular from plural text, i.e.,
145     * do not use {@code tr(size == 1 ? "singular" : "plural")} nor
146     * {@code size == 1 ? tr("singular") : tr("plural")}
147     *
148     * @param text the text to translate.
149     * Must be a string literal. (No constants or local vars.)
150     * Can be broken over multiple lines.
151     * An apostrophe ' must be quoted by another apostrophe.
152     * @param objects the parameters for the string.
153     * Mark occurrences in {@code text} with <code>{0}</code>, <code>{1}</code>, ...
154     * @return the translated string.
155     * @see #trn
156     * @see #trc
157     * @see #trnc
158     */
159    public static String tr(String text, Object... objects) {
160        if (text == null) return null;
161        return MessageFormat.format(gettext(text, null), objects);
162    }
163
164    /**
165     * Translates some text in a context for the current locale.
166     * There can be different translations for the same text within different contexts.
167     *
168     * @param context string that helps translators to find an appropriate
169     * translation for {@code text}.
170     * @param text the text to translate.
171     * @return the translated string.
172     * @see #tr
173     * @see #trn
174     * @see #trnc
175     */
176    public static String trc(String context, String text) {
177        if (context == null)
178            return tr(text);
179        if (text == null)
180            return null;
181        return MessageFormat.format(gettext(text, context), (Object) null);
182    }
183
184    public static String trcLazy(String context, String text) {
185        if (context == null)
186            return tr(text);
187        if (text == null)
188            return null;
189        return MessageFormat.format(gettextLazy(text, context), (Object) null);
190    }
191
192    /**
193     * Marks a string for translation (such that a script can harvest
194     * the translatable strings from the source files).
195     *
196     * For example, <code>
197     * String[] options = new String[] {marktr("up"), marktr("down")};
198     * lbl.setText(tr(options[0]));</code>
199     * @param text the string to be marked for translation.
200     * @return {@code text} unmodified.
201     */
202    public static String marktr(String text) {
203        return text;
204    }
205
206    public static String marktrc(String context, String text) {
207        return text;
208    }
209
210    /**
211     * Translates some text for the current locale and distinguishes between
212     * {@code singularText} and {@code pluralText} depending on {@code n}.
213     * <br>
214     * For instance, {@code trn("There was an error!", "There were errors!", i)} or
215     * <code>trn("Found {0} error in {1}!", "Found {0} errors in {1}!", i, Integer.toString(i), url)</code>.
216     *
217     * @param singularText the singular text to translate.
218     * Must be a string literal. (No constants or local vars.)
219     * Can be broken over multiple lines.
220     * An apostrophe ' must be quoted by another apostrophe.
221     * @param pluralText the plural text to translate.
222     * Must be a string literal. (No constants or local vars.)
223     * Can be broken over multiple lines.
224     * An apostrophe ' must be quoted by another apostrophe.
225     * @param n a number to determine whether {@code singularText} or {@code pluralText} is used.
226     * @param objects the parameters for the string.
227     * Mark occurrences in {@code singularText} and {@code pluralText} with <code>{0}</code>, <code>{1}</code>, ...
228     * @return the translated string.
229     * @see #tr
230     * @see #trc
231     * @see #trnc
232     */
233    public static String trn(String singularText, String pluralText, long n, Object... objects) {
234        return MessageFormat.format(gettextn(singularText, pluralText, null, n), objects);
235    }
236
237    /**
238     * Translates some text in a context for the current locale and distinguishes between
239     * {@code singularText} and {@code pluralText} depending on {@code n}.
240     * There can be different translations for the same text within different contexts.
241     *
242     * @param context string that helps translators to find an appropriate
243     * translation for {@code text}.
244     * @param singularText the singular text to translate.
245     * Must be a string literal. (No constants or local vars.)
246     * Can be broken over multiple lines.
247     * An apostrophe ' must be quoted by another apostrophe.
248     * @param pluralText the plural text to translate.
249     * Must be a string literal. (No constants or local vars.)
250     * Can be broken over multiple lines.
251     * An apostrophe ' must be quoted by another apostrophe.
252     * @param n a number to determine whether {@code singularText} or {@code pluralText} is used.
253     * @param objects the parameters for the string.
254     * Mark occurrences in {@code singularText} and {@code pluralText} with <code>{0}</code>, <code>{1}</code>, ...
255     * @return the translated string.
256     * @see #tr
257     * @see #trc
258     * @see #trn
259     */
260    public static String trnc(String context, String singularText, String pluralText, long n, Object... objects) {
261        return MessageFormat.format(gettextn(singularText, pluralText, context, n), objects);
262    }
263
264    private static String gettext(String text, String ctx, boolean lazy) {
265        int i;
266        if (ctx == null && text.startsWith("_:") && (i = text.indexOf('\n')) >= 0) {
267            ctx = text.substring(2, i-1);
268            text = text.substring(i+1);
269        }
270        if (strings != null) {
271            String trans = strings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
272            if (trans != null)
273                return trans;
274        }
275        if (pstrings != null) {
276            i = pluralEval(1);
277            String[] trans = pstrings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
278            if (trans != null && trans.length > i)
279                return trans[i];
280        }
281        return lazy ? gettext(text, null) : text;
282    }
283
284    private static String gettext(String text, String ctx) {
285        return gettext(text, ctx, false);
286    }
287
288    /* try without context, when context try fails */
289    private static String gettextLazy(String text, String ctx) {
290        return gettext(text, ctx, true);
291    }
292
293    private static String gettextn(String text, String plural, String ctx, long num) {
294        int i;
295        if (ctx == null && text.startsWith("_:") && (i = text.indexOf('\n')) >= 0) {
296            ctx = text.substring(2, i-1);
297            text = text.substring(i+1);
298        }
299        if (pstrings != null) {
300            i = pluralEval(num);
301            String[] trans = pstrings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
302            if (trans != null && trans.length > i)
303                return trans[i];
304        }
305
306        return num == 1 ? text : plural;
307    }
308
309    public static String escape(String msg) {
310        if (msg == null) return null;
311        return msg.replace("\'", "\'\'").replace("{", "\'{\'").replace("}", "\'}\'");
312    }
313
314    private static URL getTranslationFile(String lang) {
315        return I18n.class.getResource("/data/"+lang.replace('@', '-')+".lang");
316    }
317
318    /**
319     * Get a list of all available JOSM Translations.
320     * @return an array of locale objects.
321     */
322    public static Locale[] getAvailableTranslations() {
323        Collection<Locale> v = new ArrayList<>(languages.size());
324        if (getTranslationFile("en") != null) {
325            for (String loc : languages.keySet()) {
326                if (getTranslationFile(loc) != null) {
327                    v.add(LanguageInfo.getLocale(loc));
328                }
329            }
330        }
331        v.add(Locale.ENGLISH);
332        Locale[] l = new Locale[v.size()];
333        l = v.toArray(l);
334        Arrays.sort(l, Comparator.comparing(Locale::toString));
335        return l;
336    }
337
338    /**
339     * Determines if a language exists for the given code.
340     * @param code The language code
341     * @return {@code true} if a language exists, {@code false} otherwise
342     */
343    public static boolean hasCode(String code) {
344        return languages.containsKey(code);
345    }
346
347    static void setupJavaLocaleProviders() {
348        // Look up SPI providers first (for JosmDecimalFormatSymbolsProvider).
349        // Enable CLDR locale provider on Java 8 to get additional languages, such as Khmer.
350        // http://docs.oracle.com/javase/8/docs/technotes/guides/intl/enhancements.8.html#cldr
351        // FIXME: This must be updated after we switch to Java 9.
352        // See https://docs.oracle.com/javase/9/docs/api/java/util/spi/LocaleServiceProvider.html
353        try {
354            // Don't call Utils.updateSystemProperty to avoid spurious log at startup
355            System.setProperty("java.locale.providers", "SPI,JRE,CLDR");
356        } catch (SecurityException e) {
357            // Don't call Logging class, it may not be fully initialized yet
358            System.err.println("Unable to set locale providers: " + e.getMessage());
359        }
360    }
361
362    /**
363     * I18n initialization.
364     */
365    public static void init() {
366        setupJavaLocaleProviders();
367
368        /* try initial language settings, may be changed later again */
369        if (!load(LanguageInfo.getJOSMLocaleCode())) {
370            Locale.setDefault(Locale.ENGLISH);
371        }
372    }
373
374    /**
375     * I18n initialization for plugins.
376     * @param source file path/name of the JAR or Zip file containing translation strings
377     * @since 4159
378     */
379    public static void addTexts(File source) {
380        if ("en".equals(loadedCode))
381            return;
382        final ZipEntry enfile = new ZipEntry("data/en.lang");
383        final ZipEntry langfile = new ZipEntry("data/"+loadedCode+".lang");
384        try (
385            ZipFile zipFile = new ZipFile(source, StandardCharsets.UTF_8);
386            InputStream orig = zipFile.getInputStream(enfile);
387            InputStream trans = zipFile.getInputStream(langfile)
388        ) {
389            if (orig != null && trans != null)
390                load(orig, trans, true);
391        } catch (IOException | InvalidPathException e) {
392            Logging.trace(e);
393        }
394    }
395
396    private static boolean load(String l) {
397        if ("en".equals(l) || "en_US".equals(l)) {
398            strings = null;
399            pstrings = null;
400            loadedCode = "en";
401            pluralMode = PluralMode.MODE_NOTONE;
402            return true;
403        }
404        URL en = getTranslationFile("en");
405        if (en == null)
406            return false;
407        URL tr = getTranslationFile(l);
408        if (tr == null || !languages.containsKey(l)) {
409            return false;
410        }
411        try (
412            InputStream enStream = Utils.openStream(en);
413            InputStream trStream = Utils.openStream(tr)
414        ) {
415            if (load(enStream, trStream, false)) {
416                pluralMode = languages.get(l);
417                loadedCode = l;
418                return true;
419            }
420        } catch (IOException e) {
421            // Ignore exception
422            Logging.trace(e);
423        }
424        return false;
425    }
426
427    private static boolean load(InputStream en, InputStream tr, boolean add) {
428        Map<String, String> s;
429        Map<String, String[]> p;
430        if (add) {
431            s = strings;
432            p = pstrings;
433        } else {
434            s = new HashMap<>();
435            p = new HashMap<>();
436        }
437        /* file format:
438           Files are always a group. English file and translated file must provide identical datasets.
439
440           for all single strings:
441           {
442             unsigned short (2 byte) stringlength
443               - length 0 indicates missing translation
444               - length 0xFFFE indicates translation equal to original, but otherwise is equal to length 0
445             string
446           }
447           unsigned short (2 byte) 0xFFFF (marks end of single strings)
448           for all multi strings:
449           {
450             unsigned char (1 byte) stringcount
451               - count 0 indicates missing translations
452               - count 0xFE indicates translations equal to original, but otherwise is equal to length 0
453             for stringcount
454               unsigned short (2 byte) stringlength
455               string
456           }
457         */
458        try {
459            InputStream ens = new BufferedInputStream(en);
460            InputStream trs = new BufferedInputStream(tr);
461            byte[] enlen = new byte[2];
462            byte[] trlen = new byte[2];
463            boolean multimode = false;
464            byte[] str = new byte[4096];
465            for (;;) {
466                if (multimode) {
467                    int ennum = ens.read();
468                    int trnum = trs.read();
469                    if (trnum == 0xFE) /* marks identical string, handle equally to non-translated */
470                        trnum = 0;
471                    if ((ennum == -1 && trnum != -1) || (ennum != -1 && trnum == -1)) /* files do not match */
472                        return false;
473                    if (ennum == -1) {
474                        break;
475                    }
476                    String[] enstrings = new String[ennum];
477                    for (int i = 0; i < ennum; ++i) {
478                        int val = ens.read(enlen);
479                        if (val != 2) /* file corrupt */
480                            return false;
481                        val = (enlen[0] < 0 ? 256+enlen[0] : enlen[0])*256+(enlen[1] < 0 ? 256+enlen[1] : enlen[1]);
482                        if (val > str.length) {
483                            str = new byte[val];
484                        }
485                        int rval = ens.read(str, 0, val);
486                        if (rval != val) /* file corrupt */
487                            return false;
488                        enstrings[i] = new String(str, 0, val, StandardCharsets.UTF_8);
489                    }
490                    String[] trstrings = new String[trnum];
491                    for (int i = 0; i < trnum; ++i) {
492                        int val = trs.read(trlen);
493                        if (val != 2) /* file corrupt */
494                            return false;
495                        val = (trlen[0] < 0 ? 256+trlen[0] : trlen[0])*256+(trlen[1] < 0 ? 256+trlen[1] : trlen[1]);
496                        if (val > str.length) {
497                            str = new byte[val];
498                        }
499                        int rval = trs.read(str, 0, val);
500                        if (rval != val) /* file corrupt */
501                            return false;
502                        trstrings[i] = new String(str, 0, val, StandardCharsets.UTF_8);
503                    }
504                    if (trnum > 0 && !p.containsKey(enstrings[0])) {
505                        p.put(enstrings[0], trstrings);
506                    }
507                } else {
508                    int enval = ens.read(enlen);
509                    int trval = trs.read(trlen);
510                    if (enval != trval) /* files do not match */
511                        return false;
512                    if (enval == -1) {
513                        break;
514                    }
515                    if (enval != 2) /* files corrupt */
516                        return false;
517                    enval = (enlen[0] < 0 ? 256+enlen[0] : enlen[0])*256+(enlen[1] < 0 ? 256+enlen[1] : enlen[1]);
518                    trval = (trlen[0] < 0 ? 256+trlen[0] : trlen[0])*256+(trlen[1] < 0 ? 256+trlen[1] : trlen[1]);
519                    if (trval == 0xFFFE) /* marks identical string, handle equally to non-translated */
520                        trval = 0;
521                    if (enval == 0xFFFF) {
522                        multimode = true;
523                        if (trval != 0xFFFF) /* files do not match */
524                            return false;
525                    } else {
526                        if (enval > str.length) {
527                            str = new byte[enval];
528                        }
529                        if (trval > str.length) {
530                            str = new byte[trval];
531                        }
532                        int val = ens.read(str, 0, enval);
533                        if (val != enval) /* file corrupt */
534                            return false;
535                        String enstr = new String(str, 0, enval, StandardCharsets.UTF_8);
536                        if (trval != 0) {
537                            val = trs.read(str, 0, trval);
538                            if (val != trval) /* file corrupt */
539                                return false;
540                            String trstr = new String(str, 0, trval, StandardCharsets.UTF_8);
541                            if (!s.containsKey(enstr))
542                                s.put(enstr, trstr);
543                        }
544                    }
545                }
546            }
547        } catch (IOException e) {
548            Logging.trace(e);
549            return false;
550        }
551        if (!s.isEmpty()) {
552            strings = s;
553            pstrings = p;
554            return true;
555        }
556        return false;
557    }
558
559    /**
560     * Sets the default locale (see {@link Locale#setDefault(Locale)} to the local
561     * given by <code>localName</code>.
562     *
563     * Ignored if localeName is null. If the locale with name <code>localName</code>
564     * isn't found the default local is set to <code>en</code> (english).
565     *
566     * @param localeName the locale name. Ignored if null.
567     */
568    public static void set(String localeName) {
569        if (localeName != null) {
570            Locale l = LanguageInfo.getLocale(localeName);
571            if (load(LanguageInfo.getJOSMLocaleCode(l))) {
572                Locale.setDefault(l);
573            } else {
574                if (!"en".equals(l.getLanguage())) {
575                    Logging.info(tr("Unable to find translation for the locale {0}. Reverting to {1}.",
576                            LanguageInfo.getDisplayName(l), LanguageInfo.getDisplayName(Locale.getDefault())));
577                } else {
578                    strings = null;
579                    pstrings = null;
580                }
581            }
582        }
583    }
584
585    private static int pluralEval(long n) {
586        switch(pluralMode) {
587        case MODE_NOTONE: /* bg, da, de, el, en, en_GB, es, et, eu, fi, gl, is, it, iw_IL, nb, nl, sv */
588            return (n != 1) ? 1 : 0;
589        case MODE_NONE: /* id, vi, ja, km, tr, zh_CN, zh_TW */
590            return 0;
591        case MODE_GREATERONE: /* fr, pt_BR */
592            return (n > 1) ? 1 : 0;
593        case MODE_CS:
594            return (n == 1) ? 0 : (((n >= 2) && (n <= 4)) ? 1 : 2);
595        //case MODE_AR:
596        //    return ((n == 0) ? 0 : ((n == 1) ? 1 : ((n == 2) ? 2 : ((((n % 100) >= 3)
597        //            && ((n % 100) <= 10)) ? 3 : ((((n % 100) >= 11) && ((n % 100) <= 99)) ? 4 : 5)))));
598        case MODE_PL:
599            return (n == 1) ? 0 : (((((n % 10) >= 2) && ((n % 10) <= 4))
600                    && (((n % 100) < 10) || ((n % 100) >= 20))) ? 1 : 2);
601        //case MODE_RO:
602        //    return ((n == 1) ? 0 : ((((n % 100) > 19) || (((n % 100) == 0) && (n != 0))) ? 2 : 1));
603        case MODE_LT:
604            return ((n % 10) == 1) && ((n % 100) != 11) ? 0 : (((n % 10) >= 2)
605                    && (((n % 100) < 10) || ((n % 100) >= 20)) ? 1 : 2);
606        case MODE_RU:
607            return (((n % 10) == 1) && ((n % 100) != 11)) ? 0 : (((((n % 10) >= 2)
608                    && ((n % 10) <= 4)) && (((n % 100) < 10) || ((n % 100) >= 20))) ? 1 : 2);
609        case MODE_SK:
610            return (n == 1) ? 1 : (((n >= 2) && (n <= 4)) ? 2 : 0);
611        //case MODE_SL:
612        //    return (((n % 100) == 1) ? 1 : (((n % 100) == 2) ? 2 : ((((n % 100) == 3)
613        //            || ((n % 100) == 4)) ? 3 : 0)));
614        }
615        return 0;
616    }
617}