--- /dev/null
+/**
+ *******************************************************************************
+ * Copyright (C) 2006, International Business Machines Corporation and others. *
+ * All Rights Reserved. *
+ *******************************************************************************
+ */
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_BREAK_ITERATION
+
+#include "brkeng.h"
+#include "dictbe.h"
+#include "triedict.h"
+#include "unicode/uchar.h"
+#include "unicode/uniset.h"
+#include "unicode/chariter.h"
+#include "unicode/ures.h"
+#include "unicode/udata.h"
+#include "unicode/putil.h"
+#include "unicode/ustring.h"
+#include "unicode/uscript.h"
+#include "uvector.h"
+#include "mutex.h"
+#include "uresimp.h"
+#include "ubrkimpl.h"
+
+U_NAMESPACE_BEGIN
+
+/*
+ ******************************************************************
+ */
+
+LanguageBreakEngine::LanguageBreakEngine() {
+}
+
+LanguageBreakEngine::~LanguageBreakEngine() {
+}
+
+/*
+ ******************************************************************
+ */
+
+LanguageBreakFactory::LanguageBreakFactory() {
+}
+
+LanguageBreakFactory::~LanguageBreakFactory() {
+}
+
+/*
+ ******************************************************************
+ */
+
+UnhandledEngine::UnhandledEngine(UErrorCode &/*status*/) {
+ for (int32_t i = 0; i < (int32_t)(sizeof(fHandled)/sizeof(fHandled[0])); ++i) {
+ fHandled[i] = 0;
+ }
+}
+
+UnhandledEngine::~UnhandledEngine() {
+ for (int32_t i = 0; i < (int32_t)(sizeof(fHandled)/sizeof(fHandled[0])); ++i) {
+ if (fHandled[i] != 0) {
+ delete fHandled[i];
+ }
+ }
+}
+
+UBool
+UnhandledEngine::handles(UChar32 c, int32_t breakType) const {
+ return (breakType >= 0 && breakType < (int32_t)(sizeof(fHandled)/sizeof(fHandled[0]))
+ && fHandled[breakType] != 0 && fHandled[breakType]->contains(c));
+}
+
+int32_t
+UnhandledEngine::findBreaks( UText *text,
+ int32_t startPos,
+ int32_t endPos,
+ UBool reverse,
+ int32_t breakType,
+ UStack &/*foundBreaks*/ ) const {
+ if (breakType >= 0 && breakType < (int32_t)(sizeof(fHandled)/sizeof(fHandled[0]))) {
+ UChar32 c = utext_current32(text);
+ if (reverse) {
+ while((int32_t)utext_getNativeIndex(text) > startPos && fHandled[breakType]->contains(c)) {
+ c = utext_previous32(text);
+ }
+ }
+ else {
+ while((int32_t)utext_getNativeIndex(text) < endPos && fHandled[breakType]->contains(c)) {
+ utext_next32(text); // TODO: recast loop to work with post-increment operations.
+ c = utext_current32(text);
+ }
+ }
+ }
+ return 0;
+}
+
+void
+UnhandledEngine::handleCharacter(UChar32 c, int32_t breakType) {
+ if (breakType >= 0 && breakType < (int32_t)(sizeof(fHandled)/sizeof(fHandled[0]))) {
+ if (fHandled[breakType] == 0) {
+ fHandled[breakType] = new UnicodeSet();
+ if (fHandled[breakType] == 0) {
+ return;
+ }
+ }
+ if (!fHandled[breakType]->contains(c)) {
+ UErrorCode status = U_ZERO_ERROR;
+ // Apply the entire script of the character.
+ int32_t script = u_getIntPropertyValue(c, UCHAR_SCRIPT);
+ fHandled[breakType]->applyIntPropertyValue(UCHAR_SCRIPT, script, status);
+ }
+ }
+}
+
+/*
+ ******************************************************************
+ */
+
+ICULanguageBreakFactory::ICULanguageBreakFactory(UErrorCode &/*status*/) {
+ fEngines = 0;
+}
+
+ICULanguageBreakFactory::~ICULanguageBreakFactory() {
+ if (fEngines != 0) {
+ delete fEngines;
+ }
+}
+
+U_NAMESPACE_END
+U_CDECL_BEGIN
+static void U_CALLCONV _deleteEngine(void *obj) {
+ delete (const LanguageBreakEngine *) obj;
+}
+U_CDECL_END
+U_NAMESPACE_BEGIN
+
+const LanguageBreakEngine *
+ICULanguageBreakFactory::getEngineFor(UChar32 c, int32_t breakType) {
+ UBool needsInit;
+ int32_t i;
+ const LanguageBreakEngine *lbe = NULL;
+ UErrorCode status = U_ZERO_ERROR;
+
+ umtx_lock(NULL);
+ needsInit = (UBool)(fEngines == NULL);
+ if (!needsInit) {
+ i = fEngines->size();
+ while (--i >= 0) {
+ lbe = (const LanguageBreakEngine *)(fEngines->elementAt(i));
+ if (lbe != NULL && lbe->handles(c, breakType)) {
+ break;
+ }
+ lbe = NULL;
+ }
+ }
+ umtx_unlock(NULL);
+
+ if (lbe != NULL) {
+ return lbe;
+ }
+
+ if (needsInit) {
+ UStack *engines = new UStack(_deleteEngine, NULL, status);
+ if (U_SUCCESS(status) && engines == NULL) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ }
+ else if (U_FAILURE(status)) {
+ delete engines;
+ engines = NULL;
+ }
+ else {
+ umtx_lock(NULL);
+ if (fEngines == NULL) {
+ fEngines = engines;
+ engines = NULL;
+ }
+ umtx_unlock(NULL);
+ delete engines;
+ }
+ }
+
+ if (fEngines == NULL) {
+ return NULL;
+ }
+
+ // We didn't find an engine the first time through, or there was no
+ // stack. Create an engine.
+ const LanguageBreakEngine *newlbe = loadEngineFor(c, breakType);
+
+ // Now get the lock, and see if someone else has created it in the
+ // meantime
+ umtx_lock(NULL);
+ i = fEngines->size();
+ while (--i >= 0) {
+ lbe = (const LanguageBreakEngine *)(fEngines->elementAt(i));
+ if (lbe != NULL && lbe->handles(c, breakType)) {
+ break;
+ }
+ lbe = NULL;
+ }
+ if (lbe == NULL && newlbe != NULL) {
+ fEngines->push((void *)newlbe, status);
+ lbe = newlbe;
+ newlbe = NULL;
+ }
+ umtx_unlock(NULL);
+
+ delete newlbe;
+
+ return lbe;
+}
+
+const LanguageBreakEngine *
+ICULanguageBreakFactory::loadEngineFor(UChar32 c, int32_t breakType) {
+ UErrorCode status = U_ZERO_ERROR;
+ UScriptCode code = uscript_getScript(c, &status);
+ if (U_SUCCESS(status)) {
+ const CompactTrieDictionary *dict = loadDictionaryFor(code, breakType);
+ if (dict != NULL) {
+ const LanguageBreakEngine *engine = NULL;
+ switch(code) {
+ case USCRIPT_THAI:
+ engine = new ThaiBreakEngine(dict, status);
+ break;
+ default:
+ break;
+ }
+ if (engine == NULL) {
+ delete dict;
+ }
+ else if (U_FAILURE(status)) {
+ delete engine;
+ engine = NULL;
+ }
+ return engine;
+ }
+ }
+ return NULL;
+}
+
+const CompactTrieDictionary *
+ICULanguageBreakFactory::loadDictionaryFor(UScriptCode script, int32_t breakType) {
+ UErrorCode status = U_ZERO_ERROR;
+ // Open root from brkitr tree.
+ char dictnbuff[256];
+ char ext[4]={'\0'};
+
+ UResourceBundle *b = ures_open(U_ICUDATA_BRKITR, "", &status);
+ b = ures_getByKeyWithFallback(b, "dictionaries", b, &status);
+ b = ures_getByKeyWithFallback(b, uscript_getShortName(script), b, &status);
+ int32_t dictnlength = 0;
+ const UChar *dictfname = ures_getString(b, &dictnlength, &status);
+ if (U_SUCCESS(status) && (size_t)dictnlength >= sizeof(dictnbuff)) {
+ dictnlength = 0;
+ status = U_BUFFER_OVERFLOW_ERROR;
+ }
+ if (U_SUCCESS(status) && dictfname) {
+ UChar* extStart=u_strchr(dictfname, 0x002e);
+ int len = 0;
+ if(extStart!=NULL){
+ len = extStart-dictfname;
+ u_UCharsToChars(extStart+1, ext, sizeof(ext)); // nul terminates the buff
+ u_UCharsToChars(dictfname, dictnbuff, len);
+ }
+ dictnbuff[len]=0; // nul terminate
+ }
+ ures_close(b);
+ UDataMemory *file = udata_open(U_ICUDATA_BRKITR, ext, dictnbuff, &status);
+ if (U_SUCCESS(status)) {
+ const CompactTrieDictionary *dict = new CompactTrieDictionary(
+ file, status);
+ if (U_SUCCESS(status) && dict == NULL) {
+ status = U_MEMORY_ALLOCATION_ERROR;
+ }
+ if (U_FAILURE(status)) {
+ delete dict;
+ dict = NULL;
+ }
+ return dict;
+ }
+ return NULL;
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
projects / apple / icu.git / blobdiff