389 lines
11 KiB
C++
389 lines
11 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1997-2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* Date Name Description
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* 06/21/00 aliu Creation.
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*******************************************************************************
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*/
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#include "unicode/utrans.h"
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#include "unicode/putil.h"
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#include "unicode/rbt.h"
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#include "unicode/rep.h"
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#include "unicode/translit.h"
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#include "unicode/unifilt.h"
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#include "unicode/uniset.h"
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#include "unicode/ustring.h"
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#include "cpputils.h"
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// Following macro is to be followed by <return value>';' or just ';'
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#define utrans_ENTRY(s) if ((s)==NULL || U_FAILURE(*(s))) return
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/********************************************************************
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* Replaceable-UReplaceableCallbacks glue
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********************************************************************/
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/**
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* Make a UReplaceable + UReplaceableCallbacks into a Replaceable object.
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*/
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class ReplaceableGlue : public Replaceable {
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UChar *buf;
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int32_t bufLen;
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UReplaceable *rep;
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UReplaceableCallbacks *func;
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enum { BUF_PAD = 8 };
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public:
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ReplaceableGlue(UReplaceable *replaceable,
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UReplaceableCallbacks *funcCallback);
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virtual ~ReplaceableGlue();
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virtual void handleReplaceBetween(UTextOffset start,
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UTextOffset limit,
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const UnicodeString& text);
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virtual void copy(int32_t start, int32_t limit, int32_t dest);
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protected:
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virtual UChar getCharAt(UTextOffset offset) const;
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virtual UChar32 getChar32At(UTextOffset offset) const;
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};
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ReplaceableGlue::ReplaceableGlue(UReplaceable *replaceable,
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UReplaceableCallbacks *funcCallback)
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: Replaceable((*funcCallback->length)(replaceable))
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{
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this->rep = replaceable;
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this->func = funcCallback;
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buf = 0;
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bufLen = 0;
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}
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ReplaceableGlue::~ReplaceableGlue() {
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delete[] buf;
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}
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UChar ReplaceableGlue::getCharAt(UTextOffset offset) const {
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return (*func->charAt)(rep, offset);
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}
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UChar32 ReplaceableGlue::getChar32At(UTextOffset offset) const {
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return (*func->char32At)(rep, offset);
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}
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void ReplaceableGlue::handleReplaceBetween(UTextOffset start,
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UTextOffset limit,
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const UnicodeString& text) {
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int32_t len = text.length();
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if (buf == 0 || bufLen < len) {
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delete[] buf;
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bufLen = len + BUF_PAD;
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buf = new UChar[bufLen];
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}
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text.extract(0, len, buf);
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(*func->replace)(rep, start, limit, buf, len);
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fLength = (*func->length)(rep);
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}
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void ReplaceableGlue::copy(int32_t start, int32_t limit, int32_t dest) {
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(*func->copy)(rep, start, limit, dest);
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fLength = (*func->length)(rep);
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}
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/********************************************************************
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* PRIVATE Implementation
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********************************************************************/
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/**
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* Extract a UnicodeString to a char* buffer using the invariant
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* converter and return the actual length.
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*/
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static int32_t
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_utrans_copyUnicodeStringToChars(const UnicodeString& str,
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char* buf,
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int32_t bufCapacity) {
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int32_t len = str.length();
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if (buf != 0) {
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// copy whatever will fit into buf
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int32_t len2 = uprv_min(len, bufCapacity - 1);
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str.extract(0, len2, buf, "");
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buf[len2] = 0; // zero-terminate
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}
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return len; // return actual length
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}
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/********************************************************************
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* General API
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********************************************************************/
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U_CAPI UTransliterator*
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utrans_open(const char* id,
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UTransDirection dir,
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UErrorCode* status) {
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utrans_ENTRY(status) NULL;
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if (id == NULL) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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UnicodeString ID(id, ""); // use invariant converter
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Transliterator *trans = NULL;
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trans = Transliterator::createInstance(ID, dir, NULL);
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if (trans == NULL) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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return (UTransliterator*) trans;
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}
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U_CAPI UTransliterator*
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utrans_openRules(const char* id,
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const UChar* rules,
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int32_t rulesLength, /* -1 if null-terminated */
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UTransDirection dir,
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UParseError* parseErr, /* may be NULL */
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UErrorCode* status) {
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utrans_ENTRY(status) NULL;
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if (id == NULL || rules == NULL) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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UnicodeString ID(id, ""); // use invariant converter
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UnicodeString ruleStr(rulesLength < 0,
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rules,
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rulesLength); // r-o alias
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RuleBasedTransliterator *trans = NULL;
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// Use if() to avoid construction of ParseError object on stack
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// unless it is called for by user.
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if (parseErr != NULL) {
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trans = new RuleBasedTransliterator(ID, ruleStr, dir,
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NULL, *parseErr, *status);
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} else {
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trans = new RuleBasedTransliterator(ID, ruleStr, dir,
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NULL, *status);
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}
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if (trans == NULL) {
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*status = U_MEMORY_ALLOCATION_ERROR;
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} else if (U_FAILURE(*status)) {
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delete trans;
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trans = NULL;
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}
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return (UTransliterator*) trans;
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}
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U_CAPI UTransliterator*
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utrans_openInverse(const UTransliterator* trans,
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UErrorCode* status) {
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utrans_ENTRY(status) NULL;
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UTransliterator* result =
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(UTransliterator*) ((Transliterator*) trans)->createInverse();
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if (result == NULL) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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return result;
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}
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U_CAPI UTransliterator*
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utrans_clone(const UTransliterator* trans,
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UErrorCode* status) {
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utrans_ENTRY(status) NULL;
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if (trans == NULL) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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Transliterator *t = ((Transliterator*) trans)->clone();
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if (t == NULL) {
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*status = U_MEMORY_ALLOCATION_ERROR;
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}
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return (UTransliterator*) t;
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}
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U_CAPI void
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utrans_close(UTransliterator* trans) {
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delete (Transliterator*) trans;
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}
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U_CAPI int32_t
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utrans_getID(const UTransliterator* trans,
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char* buf,
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int32_t bufCapacity) {
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const UnicodeString& id = ((Transliterator*) trans)->getID();
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return _utrans_copyUnicodeStringToChars(id, buf, bufCapacity);
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}
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U_CAPI void
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utrans_register(UTransliterator* adoptedTrans,
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UErrorCode* status) {
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utrans_ENTRY(status);
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Transliterator::registerInstance((Transliterator*) adoptedTrans,
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*status);
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}
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U_CAPI void
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utrans_unregister(const char* id) {
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UnicodeString ID(id, ""); // use invariant converter
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Transliterator::unregister(ID);
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}
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U_CAPI void
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utrans_setFilter(UTransliterator* trans,
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const UChar* filterPattern,
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int32_t filterPatternLen,
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UErrorCode* status) {
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utrans_ENTRY(status);
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UnicodeFilter* filter = NULL;
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if (filterPattern != NULL && *filterPattern != 0) {
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// Create read only alias of filterPattern:
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UnicodeString pat(filterPatternLen < 0, filterPattern, filterPatternLen);
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filter = new UnicodeSet(pat, *status);
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if (U_FAILURE(*status)) {
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delete filter;
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filter = NULL;
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}
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}
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((Transliterator*) trans)->adoptFilter(filter);
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}
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U_CAPI int32_t
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utrans_countAvailableIDs(void) {
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return Transliterator::countAvailableIDs();
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}
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U_CAPI int32_t
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utrans_getAvailableID(int32_t index,
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char* buf, // may be NULL
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int32_t bufCapacity) {
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const UnicodeString& id = Transliterator::getAvailableID(index);
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return _utrans_copyUnicodeStringToChars(id, buf, bufCapacity);
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}
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/********************************************************************
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* Transliteration API
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********************************************************************/
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U_CAPI void
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utrans_trans(const UTransliterator* trans,
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UReplaceable* rep,
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UReplaceableCallbacks* repFunc,
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int32_t start,
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int32_t* limit,
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UErrorCode* status) {
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utrans_ENTRY(status);
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if (trans == 0 || rep == 0 || repFunc == 0 || limit == 0) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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ReplaceableGlue r(rep, repFunc);
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*limit = ((Transliterator*) trans)->transliterate(r, start, *limit);
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}
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U_CAPI void
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utrans_transIncremental(const UTransliterator* trans,
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UReplaceable* rep,
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UReplaceableCallbacks* repFunc,
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UTransPosition* pos,
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UErrorCode* status) {
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utrans_ENTRY(status);
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if (trans == 0 || rep == 0 || repFunc == 0 || pos == 0) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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ReplaceableGlue r(rep, repFunc);
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((Transliterator*) trans)->transliterate(r, *pos, *status);
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}
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U_CAPI void
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utrans_transUChars(const UTransliterator* trans,
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UChar* text,
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int32_t* textLength,
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int32_t textCapacity,
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int32_t start,
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int32_t* limit,
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UErrorCode* status) {
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utrans_ENTRY(status);
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if (trans == 0 || text == 0 || limit == 0) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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int32_t textLen = (textLength == NULL || *textLength < 0)
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? u_strlen(text) : *textLength;
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// writeable alias: for this ct, len CANNOT be -1 (why?)
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UnicodeString str(text, textLen, textCapacity);
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*limit = ((Transliterator*) trans)->transliterate(str, start, *limit);
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// Copy the string buffer back to text (only if necessary)
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// and fill in *neededCapacity (if neededCapacity != NULL).
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textLen = uprv_fillOutputString(str, text, textCapacity, status);
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if(textLength != NULL) {
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*textLength = textLen;
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}
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}
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U_CAPI void
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utrans_transIncrementalUChars(const UTransliterator* trans,
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UChar* text,
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int32_t* textLength,
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int32_t textCapacity,
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UTransPosition* pos,
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UErrorCode* status) {
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utrans_ENTRY(status);
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if (trans == 0 || text == 0 || pos == 0) {
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*status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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int32_t textLen = (textLength == NULL || *textLength < 0)
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? u_strlen(text) : *textLength;
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// writeable alias: for this ct, len CANNOT be -1 (why?)
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UnicodeString str(text, textLen, textCapacity);
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((Transliterator*) trans)->transliterate(str, *pos, *status);
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// Copy the string buffer back to text (only if necessary)
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// and fill in *neededCapacity (if neededCapacity != NULL).
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textLen = uprv_fillOutputString(str, text, textCapacity, status);
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if(textLength != NULL) {
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*textLength = textLen;
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}
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}
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