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+/*
+******************************************************************************
+* Copyright (c) 1996-2014, International Business Machines
+* Corporation and others. All Rights Reserved.
+******************************************************************************
+* File unorm.cpp
+*
+* Created by: Vladimir Weinstein 12052000
+*
+* Modification history :
+*
+* Date Name Description
+* 02/01/01 synwee Added normalization quickcheck enum and method.
+* 02/12/01 synwee Commented out quickcheck util api has been approved
+* Added private method for doing FCD checks
+* 02/23/01 synwee Modified quickcheck and checkFCE to run through
+* string for codepoints < 0x300 for the normalization
+* mode NFC.
+* 05/25/01+ Markus Scherer total rewrite, implement all normalization here
+* instead of just wrappers around normlzr.cpp,
+* load unorm.dat, support Unicode 3.1 with
+* supplementary code points, etc.
+* 2009-nov..2010-jan Markus Scherer total rewrite, new Normalizer2 API & code
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_NORMALIZATION
+
+#include "unicode/udata.h"
+#include "unicode/ustring.h"
+#include "unicode/uiter.h"
+#include "unicode/unorm.h"
+#include "unicode/unorm2.h"
+#include "normalizer2impl.h"
+#include "unormimp.h"
+#include "uprops.h"
+#include "ustr_imp.h"
+
+U_NAMESPACE_USE
+
+/* quick check functions ---------------------------------------------------- */
+
+U_CAPI UNormalizationCheckResult U_EXPORT2
+unorm_quickCheck(const UChar *src,
+ int32_t srcLength,
+ UNormalizationMode mode,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ return unorm2_quickCheck((const UNormalizer2 *)n2, src, srcLength, pErrorCode);
+}
+
+U_CAPI UNormalizationCheckResult U_EXPORT2
+unorm_quickCheckWithOptions(const UChar *src, int32_t srcLength,
+ UNormalizationMode mode, int32_t options,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ if(options&UNORM_UNICODE_3_2) {
+ FilteredNormalizer2 fn2(*n2, *uniset_getUnicode32Instance(*pErrorCode));
+ return unorm2_quickCheck(
+ reinterpret_cast<const UNormalizer2 *>(static_cast<Normalizer2 *>(&fn2)),
+ src, srcLength, pErrorCode);
+ } else {
+ return unorm2_quickCheck((const UNormalizer2 *)n2, src, srcLength, pErrorCode);
+ }
+}
+
+U_CAPI UBool U_EXPORT2
+unorm_isNormalized(const UChar *src, int32_t srcLength,
+ UNormalizationMode mode,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ return unorm2_isNormalized((const UNormalizer2 *)n2, src, srcLength, pErrorCode);
+}
+
+U_CAPI UBool U_EXPORT2
+unorm_isNormalizedWithOptions(const UChar *src, int32_t srcLength,
+ UNormalizationMode mode, int32_t options,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ if(options&UNORM_UNICODE_3_2) {
+ FilteredNormalizer2 fn2(*n2, *uniset_getUnicode32Instance(*pErrorCode));
+ return unorm2_isNormalized(
+ reinterpret_cast<const UNormalizer2 *>(static_cast<Normalizer2 *>(&fn2)),
+ src, srcLength, pErrorCode);
+ } else {
+ return unorm2_isNormalized((const UNormalizer2 *)n2, src, srcLength, pErrorCode);
+ }
+}
+
+/* normalize() API ---------------------------------------------------------- */
+
+/** Public API for normalizing. */
+U_CAPI int32_t U_EXPORT2
+unorm_normalize(const UChar *src, int32_t srcLength,
+ UNormalizationMode mode, int32_t options,
+ UChar *dest, int32_t destCapacity,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ if(options&UNORM_UNICODE_3_2) {
+ FilteredNormalizer2 fn2(*n2, *uniset_getUnicode32Instance(*pErrorCode));
+ return unorm2_normalize(
+ reinterpret_cast<const UNormalizer2 *>(static_cast<Normalizer2 *>(&fn2)),
+ src, srcLength, dest, destCapacity, pErrorCode);
+ } else {
+ return unorm2_normalize((const UNormalizer2 *)n2,
+ src, srcLength, dest, destCapacity, pErrorCode);
+ }
+}
+
+
+/* iteration functions ------------------------------------------------------ */
+
+static int32_t
+_iterate(UCharIterator *src, UBool forward,
+ UChar *dest, int32_t destCapacity,
+ const Normalizer2 *n2,
+ UBool doNormalize, UBool *pNeededToNormalize,
+ UErrorCode *pErrorCode) {
+ if(U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(destCapacity<0 || (dest==NULL && destCapacity>0) || src==NULL) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ if(pNeededToNormalize!=NULL) {
+ *pNeededToNormalize=FALSE;
+ }
+ if(!(forward ? src->hasNext(src) : src->hasPrevious(src))) {
+ return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
+ }
+
+ UnicodeString buffer;
+ UChar32 c;
+ if(forward) {
+ /* get one character and ignore its properties */
+ buffer.append(uiter_next32(src));
+ /* get all following characters until we see a boundary */
+ while((c=uiter_next32(src))>=0) {
+ if(n2->hasBoundaryBefore(c)) {
+ /* back out the latest movement to stop at the boundary */
+ src->move(src, -U16_LENGTH(c), UITER_CURRENT);
+ break;
+ } else {
+ buffer.append(c);
+ }
+ }
+ } else {
+ while((c=uiter_previous32(src))>=0) {
+ /* always write this character to the front of the buffer */
+ buffer.insert(0, c);
+ /* stop if this just-copied character is a boundary */
+ if(n2->hasBoundaryBefore(c)) {
+ break;
+ }
+ }
+ }
+
+ UnicodeString destString(dest, 0, destCapacity);
+ if(buffer.length()>0 && doNormalize) {
+ n2->normalize(buffer, destString, *pErrorCode).extract(dest, destCapacity, *pErrorCode);
+ if(pNeededToNormalize!=NULL && U_SUCCESS(*pErrorCode)) {
+ *pNeededToNormalize= destString!=buffer;
+ }
+ return destString.length();
+ } else {
+ /* just copy the source characters */
+ return buffer.extract(dest, destCapacity, *pErrorCode);
+ }
+}
+
+static int32_t
+unorm_iterate(UCharIterator *src, UBool forward,
+ UChar *dest, int32_t destCapacity,
+ UNormalizationMode mode, int32_t options,
+ UBool doNormalize, UBool *pNeededToNormalize,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ if(options&UNORM_UNICODE_3_2) {
+ const UnicodeSet *uni32 = uniset_getUnicode32Instance(*pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ FilteredNormalizer2 fn2(*n2, *uni32);
+ return _iterate(src, forward, dest, destCapacity,
+ &fn2, doNormalize, pNeededToNormalize, pErrorCode);
+ }
+ return _iterate(src, forward, dest, destCapacity,
+ n2, doNormalize, pNeededToNormalize, pErrorCode);
+}
+
+U_CAPI int32_t U_EXPORT2
+unorm_previous(UCharIterator *src,
+ UChar *dest, int32_t destCapacity,
+ UNormalizationMode mode, int32_t options,
+ UBool doNormalize, UBool *pNeededToNormalize,
+ UErrorCode *pErrorCode) {
+ return unorm_iterate(src, FALSE,
+ dest, destCapacity,
+ mode, options,
+ doNormalize, pNeededToNormalize,
+ pErrorCode);
+}
+
+U_CAPI int32_t U_EXPORT2
+unorm_next(UCharIterator *src,
+ UChar *dest, int32_t destCapacity,
+ UNormalizationMode mode, int32_t options,
+ UBool doNormalize, UBool *pNeededToNormalize,
+ UErrorCode *pErrorCode) {
+ return unorm_iterate(src, TRUE,
+ dest, destCapacity,
+ mode, options,
+ doNormalize, pNeededToNormalize,
+ pErrorCode);
+}
+
+/* Concatenation of normalized strings -------------------------------------- */
+
+static int32_t
+_concatenate(const UChar *left, int32_t leftLength,
+ const UChar *right, int32_t rightLength,
+ UChar *dest, int32_t destCapacity,
+ const Normalizer2 *n2,
+ UErrorCode *pErrorCode) {
+ if(U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ if(destCapacity<0 || (dest==NULL && destCapacity>0) ||
+ left==NULL || leftLength<-1 || right==NULL || rightLength<-1) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* check for overlapping right and destination */
+ if( dest!=NULL &&
+ ((right>=dest && right<(dest+destCapacity)) ||
+ (rightLength>0 && dest>=right && dest<(right+rightLength)))
+ ) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* allow left==dest */
+ UnicodeString destString;
+ if(left==dest) {
+ destString.setTo(dest, leftLength, destCapacity);
+ } else {
+ destString.setTo(dest, 0, destCapacity);
+ destString.append(left, leftLength);
+ }
+ return n2->append(destString, UnicodeString(rightLength<0, right, rightLength), *pErrorCode).
+ extract(dest, destCapacity, *pErrorCode);
+}
+
+U_CAPI int32_t U_EXPORT2
+unorm_concatenate(const UChar *left, int32_t leftLength,
+ const UChar *right, int32_t rightLength,
+ UChar *dest, int32_t destCapacity,
+ UNormalizationMode mode, int32_t options,
+ UErrorCode *pErrorCode) {
+ const Normalizer2 *n2=Normalizer2Factory::getInstance(mode, *pErrorCode);
+ if(options&UNORM_UNICODE_3_2) {
+ const UnicodeSet *uni32 = uniset_getUnicode32Instance(*pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ return 0;
+ }
+ FilteredNormalizer2 fn2(*n2, *uni32);
+ return _concatenate(left, leftLength, right, rightLength,
+ dest, destCapacity, &fn2, pErrorCode);
+ }
+ return _concatenate(left, leftLength, right, rightLength,
+ dest, destCapacity, n2, pErrorCode);
+}
+
+#endif /* #if !UCONFIG_NO_NORMALIZATION */