Check in the pristine copy of ICU 4.6...

icu46/source/i18n/utrans.cpp

+/*
+ *******************************************************************************
+ *   Copyright (C) 1997-2009, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ *******************************************************************************
+ *   Date        Name        Description
+ *   06/21/00    aliu        Creation.
+ *******************************************************************************
+ */
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION
+
+#include "unicode/utrans.h"
+#include "unicode/putil.h"
+#include "unicode/rep.h"
+#include "unicode/translit.h"
+#include "unicode/unifilt.h"
+#include "unicode/uniset.h"
+#include "unicode/ustring.h"
+#include "unicode/uenum.h"
+#include "uenumimp.h"
+#include "cpputils.h"
+#include "rbt.h"
+
+// Following macro is to be followed by <return value>';' or just ';'
+#define utrans_ENTRY(s) if ((s)==NULL || U_FAILURE(*(s))) return
+
+/********************************************************************
+ * Replaceable-UReplaceableCallbacks glue
+ ********************************************************************/
+
+/**
+ * Make a UReplaceable + UReplaceableCallbacks into a Replaceable object.
+ */
+U_NAMESPACE_BEGIN
+class ReplaceableGlue : public Replaceable {
+
+    UReplaceable *rep;
+    UReplaceableCallbacks *func;
+
+public:
+
+    ReplaceableGlue(UReplaceable *replaceable,
+                    UReplaceableCallbacks *funcCallback);
+
+    virtual ~ReplaceableGlue();
+
+    virtual void handleReplaceBetween(int32_t start,
+                                      int32_t limit,
+                                      const UnicodeString& text);
+
+    virtual void extractBetween(int32_t start,
+                                int32_t limit,
+                                UnicodeString& target) const;
+
+    virtual void copy(int32_t start, int32_t limit, int32_t dest);
+
+    // virtual Replaceable *clone() const { return NULL; } same as default
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for the actual class.
+     *
+     * @draft ICU 2.2
+     */
+    virtual UClassID getDynamicClassID() const;
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for this class.
+     *
+     * @draft ICU 2.2
+     */
+    static UClassID U_EXPORT2 getStaticClassID();
+
+protected:
+
+    virtual int32_t getLength() const;
+
+    virtual UChar getCharAt(int32_t offset) const;
+
+    virtual UChar32 getChar32At(int32_t offset) const;
+};
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ReplaceableGlue)
+
+ReplaceableGlue::ReplaceableGlue(UReplaceable *replaceable,
+                                 UReplaceableCallbacks *funcCallback)
+  : Replaceable()
+{
+    this->rep = replaceable;
+    this->func = funcCallback;
+}
+
+ReplaceableGlue::~ReplaceableGlue() {}
+
+int32_t ReplaceableGlue::getLength() const {
+    return (*func->length)(rep);
+}
+
+UChar ReplaceableGlue::getCharAt(int32_t offset) const {
+    return (*func->charAt)(rep, offset);
+}
+
+UChar32 ReplaceableGlue::getChar32At(int32_t offset) const {
+    return (*func->char32At)(rep, offset);
+}
+
+void ReplaceableGlue::handleReplaceBetween(int32_t start,
+                          int32_t limit,
+                          const UnicodeString& text) {
+    (*func->replace)(rep, start, limit, text.getBuffer(), text.length());
+}
+
+void ReplaceableGlue::extractBetween(int32_t start,
+                                     int32_t limit,
+                                     UnicodeString& target) const {
+    (*func->extract)(rep, start, limit, target.getBuffer(limit-start));
+    target.releaseBuffer(limit-start);
+}
+
+void ReplaceableGlue::copy(int32_t start, int32_t limit, int32_t dest) {
+    (*func->copy)(rep, start, limit, dest);
+}
+U_NAMESPACE_END
+/********************************************************************
+ * General API
+ ********************************************************************/
+U_NAMESPACE_USE
+
+U_CAPI UTransliterator* U_EXPORT2
+utrans_openU(const UChar *id,
+             int32_t idLength,
+             UTransDirection dir,
+             const UChar *rules,
+             int32_t rulesLength,
+             UParseError *parseError,
+             UErrorCode *status) {
+    if(status==NULL || U_FAILURE(*status)) {
+        return NULL;
+    }
+    if (id == NULL) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return NULL;
+    }
+    UParseError temp;
+    
+    if(parseError == NULL){
+        parseError = &temp;
+    }
+    
+    UnicodeString ID(idLength<0, id, idLength); // r-o alias
+
+    if(rules==NULL){
+
+        Transliterator *trans = NULL;
+
+        trans = Transliterator::createInstance(ID, dir, *parseError, *status);
+        
+        if(U_FAILURE(*status)){
+            return NULL;
+        }
+        return (UTransliterator*) trans;
+    }else{
+        UnicodeString ruleStr(rulesLength < 0,
+                              rules,
+                              rulesLength); // r-o alias
+
+        Transliterator *trans = NULL;
+        trans = Transliterator::createFromRules(ID, ruleStr, dir, *parseError, *status); 
+        if(U_FAILURE(*status)) { 
+            return NULL;
+        }
+
+        return (UTransliterator*) trans;
+    }
+}
+
+U_CAPI UTransliterator* U_EXPORT2
+utrans_open(const char* id,
+            UTransDirection dir,
+            const UChar* rules,         /* may be Null */
+            int32_t rulesLength,        /* -1 if null-terminated */ 
+            UParseError* parseError,    /* may be Null */
+            UErrorCode* status) {
+    UnicodeString ID(id, -1, US_INV); // use invariant converter
+    return utrans_openU(ID.getBuffer(), ID.length(), dir,
+                        rules, rulesLength,
+                        parseError, status);
+}
+
+U_CAPI UTransliterator* U_EXPORT2
+utrans_openInverse(const UTransliterator* trans,
+                   UErrorCode* status) {
+
+    utrans_ENTRY(status) NULL;
+
+    UTransliterator* result =
+        (UTransliterator*) ((Transliterator*) trans)->createInverse(*status);
+
+    return result;
+}
+
+U_CAPI UTransliterator* U_EXPORT2
+utrans_clone(const UTransliterator* trans,
+             UErrorCode* status) {
+
+    utrans_ENTRY(status) NULL;
+
+    if (trans == NULL) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return NULL;
+    }
+
+    Transliterator *t = ((Transliterator*) trans)->clone();
+    if (t == NULL) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+    }
+    return (UTransliterator*) t;
+}
+
+U_CAPI void U_EXPORT2
+utrans_close(UTransliterator* trans) {
+    delete (Transliterator*) trans;
+}
+
+U_CAPI const UChar * U_EXPORT2
+utrans_getUnicodeID(const UTransliterator *trans,
+                    int32_t *resultLength) {
+    // Transliterator keeps its ID NUL-terminated
+    const UnicodeString &ID=((Transliterator*) trans)->getID();
+    if(resultLength!=NULL) {
+        *resultLength=ID.length();
+    }
+    return ID.getBuffer();
+}
+
+U_CAPI int32_t U_EXPORT2
+utrans_getID(const UTransliterator* trans,
+             char* buf,
+             int32_t bufCapacity) {
+    return ((Transliterator*) trans)->getID().extract(0, 0x7fffffff, buf, bufCapacity, US_INV);
+}
+
+U_CAPI void U_EXPORT2
+utrans_register(UTransliterator* adoptedTrans,
+                UErrorCode* status) {
+    utrans_ENTRY(status);
+    // status currently ignored; may remove later
+    Transliterator::registerInstance((Transliterator*) adoptedTrans);
+}
+
+U_CAPI void U_EXPORT2
+utrans_unregisterID(const UChar* id, int32_t idLength) {
+    UnicodeString ID(idLength<0, id, idLength); // r-o alias
+    Transliterator::unregister(ID);
+}
+
+U_CAPI void U_EXPORT2
+utrans_unregister(const char* id) {
+    UnicodeString ID(id, -1, US_INV); // use invariant converter
+    Transliterator::unregister(ID);
+}
+
+U_CAPI void U_EXPORT2
+utrans_setFilter(UTransliterator* trans,
+                 const UChar* filterPattern,
+                 int32_t filterPatternLen,
+                 UErrorCode* status) {
+
+    utrans_ENTRY(status);
+    UnicodeFilter* filter = NULL;
+    if (filterPattern != NULL && *filterPattern != 0) {
+        // Create read only alias of filterPattern:
+        UnicodeString pat(filterPatternLen < 0, filterPattern, filterPatternLen);
+        filter = new UnicodeSet(pat, *status);
+        /* test for NULL */
+        if (filter == NULL) {
+            *status = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        if (U_FAILURE(*status)) {
+            delete filter;
+            filter = NULL;
+        }
+    }
+    ((Transliterator*) trans)->adoptFilter(filter);
+}
+
+U_CAPI int32_t U_EXPORT2
+utrans_countAvailableIDs(void) {
+    return Transliterator::countAvailableIDs();
+}
+
+U_CAPI int32_t U_EXPORT2
+utrans_getAvailableID(int32_t index,
+                      char* buf, // may be NULL
+                      int32_t bufCapacity) {
+    return Transliterator::getAvailableID(index).extract(0, 0x7fffffff, buf, bufCapacity, US_INV);
+}
+
+/* Transliterator UEnumeration ---------------------------------------------- */
+
+typedef struct UTransEnumeration {
+    UEnumeration uenum;
+    int32_t index, count;
+} UTransEnumeration;
+
+U_CDECL_BEGIN
+static int32_t U_CALLCONV
+utrans_enum_count(UEnumeration *uenum, UErrorCode *pErrorCode) {
+    if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+        return 0;
+    }
+    return ((UTransEnumeration *)uenum)->count;
+}
+
+static const UChar* U_CALLCONV
+utrans_enum_unext(UEnumeration *uenum,
+                  int32_t* resultLength,
+                  UErrorCode *pErrorCode) {
+    if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+        return 0;
+    }
+
+    UTransEnumeration *ute=(UTransEnumeration *)uenum;
+    int32_t index=ute->index;
+    if(index<ute->count) {
+        const UnicodeString &ID=Transliterator::getAvailableID(index);
+        ute->index=index+1;
+        if(resultLength!=NULL) {
+            *resultLength=ID.length();
+        }
+        // Transliterator keeps its ID NUL-terminated
+        return ID.getBuffer();
+    }
+
+    if(resultLength!=NULL) {
+        *resultLength=0;
+    }
+    return NULL;
+}
+
+static void U_CALLCONV
+utrans_enum_reset(UEnumeration *uenum, UErrorCode *pErrorCode) {
+    if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+        return;
+    }
+
+    UTransEnumeration *ute=(UTransEnumeration *)uenum;
+    ute->index=0;
+    ute->count=Transliterator::countAvailableIDs();
+}
+
+static void U_CALLCONV
+utrans_enum_close(UEnumeration *uenum) {
+    uprv_free(uenum);
+}
+U_CDECL_END
+
+static const UEnumeration utransEnumeration={
+    NULL,
+    NULL,
+    utrans_enum_close,
+    utrans_enum_count,
+    utrans_enum_unext,
+    uenum_nextDefault,
+    utrans_enum_reset
+};
+
+U_CAPI UEnumeration * U_EXPORT2
+utrans_openIDs(UErrorCode *pErrorCode) {
+    UTransEnumeration *ute;
+
+    if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+        return NULL;
+    }
+
+    ute=(UTransEnumeration *)uprv_malloc(sizeof(UTransEnumeration));
+    if(ute==NULL) {
+        *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+        return NULL;
+    }
+
+    ute->uenum=utransEnumeration;
+    ute->index=0;
+    ute->count=Transliterator::countAvailableIDs();
+    return (UEnumeration *)ute;
+}
+
+/********************************************************************
+ * Transliteration API
+ ********************************************************************/
+
+U_CAPI void U_EXPORT2
+utrans_trans(const UTransliterator* trans,
+             UReplaceable* rep,
+             UReplaceableCallbacks* repFunc,
+             int32_t start,
+             int32_t* limit,
+             UErrorCode* status) {
+
+    utrans_ENTRY(status);
+
+    if (trans == 0 || rep == 0 || repFunc == 0 || limit == 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+
+    ReplaceableGlue r(rep, repFunc);
+
+    *limit = ((Transliterator*) trans)->transliterate(r, start, *limit);
+}
+
+U_CAPI void U_EXPORT2
+utrans_transIncremental(const UTransliterator* trans,
+                        UReplaceable* rep,
+                        UReplaceableCallbacks* repFunc,
+                        UTransPosition* pos,
+                        UErrorCode* status) {
+
+    utrans_ENTRY(status);
+
+    if (trans == 0 || rep == 0 || repFunc == 0 || pos == 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+
+    ReplaceableGlue r(rep, repFunc);
+
+    ((Transliterator*) trans)->transliterate(r, *pos, *status);
+}
+
+U_CAPI void U_EXPORT2
+utrans_transUChars(const UTransliterator* trans,
+                   UChar* text,
+                   int32_t* textLength,
+                   int32_t textCapacity,
+                   int32_t start,
+                   int32_t* limit,
+                   UErrorCode* status) {
+
+    utrans_ENTRY(status);
+
+    if (trans == 0 || text == 0 || limit == 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+ 
+    int32_t textLen = (textLength == NULL || *textLength < 0)
+        ? u_strlen(text) : *textLength;
+    // writeable alias: for this ct, len CANNOT be -1 (why?)
+    UnicodeString str(text, textLen, textCapacity);
+
+    *limit = ((Transliterator*) trans)->transliterate(str, start, *limit);
+
+    // Copy the string buffer back to text (only if necessary)
+    // and fill in *neededCapacity (if neededCapacity != NULL).
+    textLen = str.extract(text, textCapacity, *status);
+    if(textLength != NULL) {
+        *textLength = textLen;
+    }
+}
+
+U_CAPI void U_EXPORT2
+utrans_transIncrementalUChars(const UTransliterator* trans,
+                              UChar* text,
+                              int32_t* textLength,
+                              int32_t textCapacity,
+                              UTransPosition* pos,
+                              UErrorCode* status) {
+
+    utrans_ENTRY(status);
+
+    if (trans == 0 || text == 0 || pos == 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+
+    int32_t textLen = (textLength == NULL || *textLength < 0)
+        ? u_strlen(text) : *textLength;
+    // writeable alias: for this ct, len CANNOT be -1 (why?)
+    UnicodeString str(text, textLen, textCapacity);
+
+    ((Transliterator*) trans)->transliterate(str, *pos, *status);
+
+    // Copy the string buffer back to text (only if necessary)
+    // and fill in *neededCapacity (if neededCapacity != NULL).
+    textLen = str.extract(text, textCapacity, *status);
+    if(textLength != NULL) {
+        *textLength = textLen;
+    }
+}
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */