+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
-* Copyright (c) 1996-2003, International Business Machines
+* Copyright (c) 1996-2014, International Business Machines
* Corporation and others. All Rights Reserved.
******************************************************************************
* File unorm.cpp
* 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"
-// moved up to make unorm_cmpEquivFold work without normalization
-#include "unicode/ustring.h"
-#include "unormimp.h"
-#include "ustr_imp.h"
-
#if !UCONFIG_NO_NORMALIZATION
#include "unicode/udata.h"
-#include "unicode/uchar.h"
+#include "unicode/ustring.h"
#include "unicode/uiter.h"
-#include "unicode/uniset.h"
-#include "unicode/usetiter.h"
#include "unicode/unorm.h"
-#include "cmemory.h"
-#include "umutex.h"
-#include "utrie.h"
-#include "unicode/uset.h"
-
-/*
- * Status of tailored normalization
- *
- * This was done initially for investigation on Unicode public review issue 7
- * (http://www.unicode.org/review/). See Jitterbug 2481.
- * While the UTC at meeting #94 (2003mar) did not take up the issue, this is
- * a permanent feature in ICU 2.6 in support of IDNA which requires true
- * Unicode 3.2 normalization.
- * (NormalizationCorrections are rolled into IDNA mapping tables.)
- *
- * Tailored normalization as implemented here allows to "normalize less"
- * than full Unicode normalization would.
- * Based internally on a UnicodeSet of code points that are
- * "excluded from normalization", the normalization functions leave those
- * code points alone ("inert"). This means that tailored normalization
- * still transforms text into a canonically equivalent form.
- * It does not add decompositions to code points that do not have any or
- * change decomposition results.
- *
- * Any function that searches for a safe boundary has not been touched,
- * which means that these functions will be over-pessimistic when
- * exclusions are applied.
- * This should not matter because subsequent checks and normalizations
- * do apply the exclusions; only a little more of the text may be processed
- * than necessary under exclusions.
- *
- * Normalization exclusions have the following effect on excluded code points c:
- * - c is not decomposed
- * - c is not a composition target
- * - c does not combine forward or backward for composition
- * except that this is not implemented for Jamo
- * - c is treated as having a combining class of 0
- */
-#define LENGTHOF(array) (sizeof(array)/sizeof((array)[0]))
-
-/*
- * This new implementation of the normalization code loads its data from
- * unorm.dat, which is generated with the gennorm tool.
- * The format of that file is described in unormimp.h .
- */
-
-/* -------------------------------------------------------------------------- */
-
-enum {
- _STACK_BUFFER_CAPACITY=100
-};
-
-/*
- * Constants for the bit fields in the options bit set parameter.
- * These need not be public.
- * A user only needs to know the currently assigned values.
- * The number and positions of reserved bits per field can remain private
- * and may change in future implementations.
- */
-enum {
- _NORM_OPTIONS_NX_MASK=0x1f,
- _NORM_OPTIONS_UNICODE_MASK=0xe0,
- _NORM_OPTIONS_SETS_MASK=0xff,
-
- _NORM_OPTIONS_UNICODE_SHIFT=5
-};
-
-static inline UBool
-isHangulWithoutJamoT(UChar c) {
- c-=HANGUL_BASE;
- return c<HANGUL_COUNT && c%JAMO_T_COUNT==0;
-}
-
-/* norm32 helpers */
-
-/* is this a norm32 with a regular index? */
-static inline UBool
-isNorm32Regular(uint32_t norm32) {
- return norm32<_NORM_MIN_SPECIAL;
-}
-
-/* is this a norm32 with a special index for a lead surrogate? */
-static inline UBool
-isNorm32LeadSurrogate(uint32_t norm32) {
- return _NORM_MIN_SPECIAL<=norm32 && norm32<_NORM_SURROGATES_TOP;
-}
-
-/* is this a norm32 with a special index for a Hangul syllable or a Jamo? */
-static inline UBool
-isNorm32HangulOrJamo(uint32_t norm32) {
- return norm32>=_NORM_MIN_HANGUL;
-}
-
-/*
- * Given isNorm32HangulOrJamo(),
- * is this a Hangul syllable or a Jamo?
- */
-static inline UBool
-isHangulJamoNorm32HangulOrJamoL(uint32_t norm32) {
- return norm32<_NORM_MIN_JAMO_V;
-}
-
-/*
- * Given norm32 for Jamo V or T,
- * is this a Jamo V?
- */
-static inline UBool
-isJamoVTNorm32JamoV(uint32_t norm32) {
- return norm32<_NORM_JAMO_V_TOP;
-}
-
-/* some prototypes ---------------------------------------------------------- */
-
-static const UChar *
-_findPreviousStarter(const UChar *start, const UChar *src,
- uint32_t ccOrQCMask, uint32_t decompQCMask, UChar minNoMaybe);
-
-static const UChar *
-_findNextStarter(const UChar *src, const UChar *limit,
- uint32_t qcMask, uint32_t decompQCMask, UChar minNoMaybe);
-
-static const UChar *
-_composePart(UChar *stackBuffer, UChar *&buffer, int32_t &bufferCapacity, int32_t &length,
- const UChar *prevStarter, const UChar *src,
- uint32_t qcMask, uint8_t &prevCC,
- const UnicodeSet *nx,
- UErrorCode *pErrorCode);
-
-/* load unorm.dat ----------------------------------------------------------- */
-
-#define DATA_NAME "unorm"
-#define DATA_TYPE "icu"
-
-static UDataMemory *normData=NULL;
-static UErrorCode dataErrorCode=U_ZERO_ERROR;
-static int8_t haveNormData=0;
-
-static int32_t indexes[_NORM_INDEX_TOP]={ 0 };
-static UTrie normTrie={ 0,0,0,0,0,0,0 }, fcdTrie={ 0,0,0,0,0,0,0 }, auxTrie={ 0,0,0,0,0,0,0 };
-
-/*
- * pointers into the memory-mapped unorm.icu
- */
-static const uint16_t *extraData=NULL,
- *combiningTable=NULL,
- *canonStartSets=NULL;
-
-static uint8_t formatVersion[4]={ 0, 0, 0, 0 };
-static UBool formatVersion_2_1=FALSE, formatVersion_2_2=FALSE;
-
-/* the Unicode version of the normalization data */
-static UVersionInfo dataVersion={ 0, 0, 0, 0 };
-
-/* cache UnicodeSets for each combination of exclusion flags */
-static UnicodeSet *nxCache[_NORM_OPTIONS_SETS_MASK+1]={ NULL };
-
-U_CDECL_BEGIN
-
-UBool
-unorm_cleanup() {
- int32_t i;
-
- if(normData!=NULL) {
- udata_close(normData);
- normData=NULL;
- }
- dataErrorCode=U_ZERO_ERROR;
- haveNormData=0;
-
- for(i=0; i<(int32_t)LENGTHOF(nxCache); ++i) {
- delete nxCache[i];
- }
- uprv_memset(nxCache, 0, sizeof(nxCache));
-
- return TRUE;
-}
-
-/* normTrie: 32-bit trie result may contain a special extraData index with the folding offset */
-static int32_t U_CALLCONV
-getFoldingNormOffset(uint32_t norm32) {
- if(isNorm32LeadSurrogate(norm32)) {
- return
- UTRIE_BMP_INDEX_LENGTH+
- (((int32_t)norm32>>(_NORM_EXTRA_SHIFT-UTRIE_SURROGATE_BLOCK_BITS))&
- (0x3ff<<UTRIE_SURROGATE_BLOCK_BITS));
- } else {
- return 0;
- }
-}
-
-/* fcdTrie: the folding offset is the lead FCD value itself */
-static int32_t U_CALLCONV
-getFoldingFCDOffset(uint32_t data) {
- return (int32_t)data;
-}
-
-/* auxTrie: the folding offset is in bits 9..0 of the 16-bit trie result */
-static int32_t U_CALLCONV
-getFoldingAuxOffset(uint32_t data) {
- return (int32_t)(data&_NORM_AUX_FNC_MASK)<<UTRIE_SURROGATE_BLOCK_BITS;
-}
-
-static UBool U_CALLCONV
-isAcceptable(void * /* context */,
- const char * /* type */, const char * /* name */,
- const UDataInfo *pInfo) {
- if(
- pInfo->size>=20 &&
- pInfo->isBigEndian==U_IS_BIG_ENDIAN &&
- pInfo->charsetFamily==U_CHARSET_FAMILY &&
- pInfo->dataFormat[0]==0x4e && /* dataFormat="Norm" */
- pInfo->dataFormat[1]==0x6f &&
- pInfo->dataFormat[2]==0x72 &&
- pInfo->dataFormat[3]==0x6d &&
- pInfo->formatVersion[0]==2 &&
- pInfo->formatVersion[2]==UTRIE_SHIFT &&
- pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT
- ) {
- uprv_memcpy(formatVersion, pInfo->formatVersion, 4);
- uprv_memcpy(dataVersion, pInfo->dataVersion, 4);
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-static UBool U_CALLCONV
-_enumPropertyStartsRange(const void *context, UChar32 start, UChar32 /*limit*/, uint32_t /*value*/) {
- /* add the start code point to the USet */
- uset_add((USet *)context, start);
- return TRUE;
-}
-
-U_CDECL_END
-
-static int8_t
-loadNormData(UErrorCode &errorCode) {
- /* load Unicode normalization data from file */
-
- /*
- * This lazy intialization with double-checked locking (without mutex protection for
- * haveNormData==0) is transiently unsafe under certain circumstances.
- * Check the readme and use u_init() if necessary.
- *
- * While u_init() initializes the main normalization data via this functions,
- * it does not do so for exclusion sets (which are fully mutexed).
- * This is because
- * - there can be many exclusion sets
- * - they are rarely used
- * - they are not usually used in execution paths that are
- * as performance-sensitive as others
- * (e.g., IDNA takes more time than unorm_quickCheck() anyway)
- */
- if(haveNormData==0) {
- UTrie _normTrie={ 0,0,0,0,0,0,0 }, _fcdTrie={ 0,0,0,0,0,0,0 }, _auxTrie={ 0,0,0,0,0,0,0 };
- UDataMemory *data;
- const int32_t *p=NULL;
- const uint8_t *pb;
-
- if(&errorCode==NULL || U_FAILURE(errorCode)) {
- return 0;
- }
-
- /* open the data outside the mutex block */
- data=udata_openChoice(NULL, DATA_TYPE, DATA_NAME, isAcceptable, NULL, &errorCode);
- dataErrorCode=errorCode;
- if(U_FAILURE(errorCode)) {
- return haveNormData=-1;
- }
-
- p=(const int32_t *)udata_getMemory(data);
- pb=(const uint8_t *)(p+_NORM_INDEX_TOP);
- utrie_unserialize(&_normTrie, pb, p[_NORM_INDEX_TRIE_SIZE], &errorCode);
- _normTrie.getFoldingOffset=getFoldingNormOffset;
-
- pb+=p[_NORM_INDEX_TRIE_SIZE]+p[_NORM_INDEX_UCHAR_COUNT]*2+p[_NORM_INDEX_COMBINE_DATA_COUNT]*2;
- utrie_unserialize(&_fcdTrie, pb, p[_NORM_INDEX_FCD_TRIE_SIZE], &errorCode);
- _fcdTrie.getFoldingOffset=getFoldingFCDOffset;
-
- if(p[_NORM_INDEX_FCD_TRIE_SIZE]!=0) {
- pb+=p[_NORM_INDEX_FCD_TRIE_SIZE];
- utrie_unserialize(&_auxTrie, pb, p[_NORM_INDEX_AUX_TRIE_SIZE], &errorCode);
- _auxTrie.getFoldingOffset=getFoldingAuxOffset;
- }
-
- if(U_FAILURE(errorCode)) {
- dataErrorCode=errorCode;
- udata_close(data);
- return haveNormData=-1;
- }
-
- /* in the mutex block, set the data for this process */
- umtx_lock(NULL);
- if(normData==NULL) {
- normData=data;
- data=NULL;
-
- uprv_memcpy(&indexes, p, sizeof(indexes));
- uprv_memcpy(&normTrie, &_normTrie, sizeof(UTrie));
- uprv_memcpy(&fcdTrie, &_fcdTrie, sizeof(UTrie));
- uprv_memcpy(&auxTrie, &_auxTrie, sizeof(UTrie));
- } else {
- p=(const int32_t *)udata_getMemory(normData);
- }
- umtx_unlock(NULL);
-
- /* initialize some variables */
- extraData=(uint16_t *)((uint8_t *)(p+_NORM_INDEX_TOP)+indexes[_NORM_INDEX_TRIE_SIZE]);
- combiningTable=extraData+indexes[_NORM_INDEX_UCHAR_COUNT];
- formatVersion_2_1=formatVersion[0]>2 || (formatVersion[0]==2 && formatVersion[1]>=1);
- formatVersion_2_2=formatVersion[0]>2 || (formatVersion[0]==2 && formatVersion[1]>=2);
- if(formatVersion_2_1) {
- canonStartSets=combiningTable+
- indexes[_NORM_INDEX_COMBINE_DATA_COUNT]+
- (indexes[_NORM_INDEX_FCD_TRIE_SIZE]+indexes[_NORM_INDEX_AUX_TRIE_SIZE])/2;
- }
- haveNormData=1;
-
- /* if a different thread set it first, then close the extra data */
- if(data!=NULL) {
- udata_close(data); /* NULL if it was set correctly */
- }
- }
-
- return haveNormData;
-}
-
-static inline UBool
-_haveData(UErrorCode &errorCode) {
- if(haveNormData!=0) {
- errorCode=dataErrorCode;
- return (UBool)(haveNormData>0);
- } else {
- return (UBool)(loadNormData(errorCode)>0);
- }
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_haveData(UErrorCode *pErrorCode) {
- return _haveData(*pErrorCode);
-}
-
-U_CAPI const uint16_t * U_EXPORT2
-unorm_getFCDTrie(UErrorCode *pErrorCode) {
- if(_haveData(*pErrorCode)) {
- return fcdTrie.index;
- } else {
- return NULL;
- }
-}
-
-/* data access primitives --------------------------------------------------- */
-
-static inline uint32_t
-_getNorm32(UChar c) {
- return UTRIE_GET32_FROM_LEAD(&normTrie, c);
-}
-
-static inline uint32_t
-_getNorm32FromSurrogatePair(uint32_t norm32, UChar c2) {
- /*
- * the surrogate index in norm32 stores only the number of the surrogate index block
- * see gennorm/store.c/getFoldedNormValue()
- */
- norm32=
- UTRIE_BMP_INDEX_LENGTH+
- ((norm32>>(_NORM_EXTRA_SHIFT-UTRIE_SURROGATE_BLOCK_BITS))&
- (0x3ff<<UTRIE_SURROGATE_BLOCK_BITS));
- return UTRIE_GET32_FROM_OFFSET_TRAIL(&normTrie, norm32, c2);
-}
-
-/*
- * get a norm32 from text with complete code points
- * (like from decompositions)
- */
-static inline uint32_t
-_getNorm32(const UChar *p, uint32_t mask) {
- uint32_t norm32=_getNorm32(*p);
- if((norm32&mask) && isNorm32LeadSurrogate(norm32)) {
- /* *p is a lead surrogate, get the real norm32 */
- norm32=_getNorm32FromSurrogatePair(norm32, *(p+1));
- }
- return norm32;
-}
-
-static inline uint16_t
-_getFCD16(UChar c) {
- return UTRIE_GET16_FROM_LEAD(&fcdTrie, c);
-}
-
-static inline uint16_t
-_getFCD16FromSurrogatePair(uint16_t fcd16, UChar c2) {
- /* the surrogate index in fcd16 is an absolute offset over the start of stage 1 */
- return UTRIE_GET16_FROM_OFFSET_TRAIL(&fcdTrie, fcd16, c2);
-}
-
-static inline const uint16_t *
-_getExtraData(uint32_t norm32) {
- return extraData+(norm32>>_NORM_EXTRA_SHIFT);
-}
-
-/* normalization exclusion sets --------------------------------------------- */
-
-/*
- * Normalization exclusion UnicodeSets are used for tailored normalization;
- * see the comment near the beginning of this file.
- *
- * By specifying one or several sets of code points,
- * those code points become inert for normalization.
- */
-
-static const UnicodeSet *
-internalGetNXHangul(UErrorCode &errorCode) {
- /* internal function, does not check for incoming U_FAILURE */
-
- UBool isCached;
-
- /* do this because double-checked locking is broken */
- umtx_lock(NULL);
- isCached=nxCache[UNORM_NX_HANGUL]!=NULL;
- umtx_unlock(NULL);
-
- if(!isCached) {
- UnicodeSet *set=new UnicodeSet(0xac00, 0xd7a3);
- if(set==NULL) {
- errorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
-
- umtx_lock(NULL);
- if(nxCache[UNORM_NX_HANGUL]==NULL) {
- nxCache[UNORM_NX_HANGUL]=set;
- set=NULL;
- }
- umtx_unlock(NULL);
-
- delete set;
- }
-
- return nxCache[UNORM_NX_HANGUL];
-}
-
-static const UnicodeSet *
-internalGetNXCJKCompat(UErrorCode &errorCode) {
- /* internal function, does not check for incoming U_FAILURE */
-
- UBool isCached;
-
- /* do this because double-checked locking is broken */
- umtx_lock(NULL);
- isCached=nxCache[UNORM_NX_CJK_COMPAT]!=NULL;
- umtx_unlock(NULL);
-
- if(!isCached) {
- /* build a set from [CJK Ideographs]&[has canonical decomposition] */
- UnicodeSet *set, *hasDecomp;
-
- set=new UnicodeSet(UNICODE_STRING("[:Ideographic:]", 15), errorCode);
- if(set==NULL) {
- errorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
- if(U_FAILURE(errorCode)) {
- delete set;
- return NULL;
- }
-
- /* start with an empty set for [has canonical decomposition] */
- hasDecomp=new UnicodeSet();
- if(hasDecomp==NULL) {
- delete set;
- errorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
-
- /* iterate over all ideographs and remember which canonically decompose */
- UnicodeSetIterator it(*set);
- UChar32 start, end;
- uint32_t norm32;
-
- while(it.nextRange() && !it.isString()) {
- start=it.getCodepoint();
- end=it.getCodepointEnd();
- while(start<=end) {
- UTRIE_GET32(&normTrie, start, norm32);
- if(norm32&_NORM_QC_NFD) {
- hasDecomp->add(start);
- }
- ++start;
- }
- }
-
- /* hasDecomp now contains all ideographs that decompose canonically */
-
- umtx_lock(NULL);
- if(nxCache[UNORM_NX_CJK_COMPAT]==NULL) {
- nxCache[UNORM_NX_CJK_COMPAT]=hasDecomp;
- hasDecomp=NULL;
- }
- umtx_unlock(NULL);
-
- delete hasDecomp;
- delete set;
- }
-
- return nxCache[UNORM_NX_CJK_COMPAT];
-}
-
-static const UnicodeSet *
-internalGetNXUnicode(uint32_t options, UErrorCode &errorCode) {
- /* internal function, does not check for incoming U_FAILURE */
- options&=_NORM_OPTIONS_UNICODE_MASK;
- if(options==0) {
- return NULL;
- }
-
- UBool isCached;
-
- /* do this because double-checked locking is broken */
- umtx_lock(NULL);
- isCached=nxCache[options]!=NULL;
- umtx_unlock(NULL);
-
- if(!isCached) {
- /* build a set with all code points that were not designated by the specified Unicode version */
- UnicodeSet *set;
-
- switch(options) {
- case UNORM_UNICODE_3_2:
- set=new UnicodeSet(UNICODE_STRING("[:^Age=3.2:]", 12), errorCode);
- break;
- default:
- errorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(set==NULL) {
- errorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
- if(U_FAILURE(errorCode)) {
- delete set;
- return NULL;
- }
-
- umtx_lock(NULL);
- if(nxCache[options]==NULL) {
- nxCache[options]=set;
- set=NULL;
- }
- umtx_unlock(NULL);
-
- delete set;
- }
-
- return nxCache[options];
-}
-
-/* Get a decomposition exclusion set. The data must be loaded. */
-static const UnicodeSet *
-internalGetNX(int32_t options, UErrorCode &errorCode) {
- options&=_NORM_OPTIONS_SETS_MASK;
-
- UBool isCached;
-
- /* do this because double-checked locking is broken */
- umtx_lock(NULL);
- isCached=nxCache[options]!=NULL;
- umtx_unlock(NULL);
-
- if(!isCached) {
- /* return basic sets */
- if(options==UNORM_NX_HANGUL) {
- return internalGetNXHangul(errorCode);
- }
- if(options==UNORM_NX_CJK_COMPAT) {
- return internalGetNXCJKCompat(errorCode);
- }
- if((options&_NORM_OPTIONS_UNICODE_MASK)!=0 && (options&_NORM_OPTIONS_NX_MASK)==0) {
- return internalGetNXUnicode(options, errorCode);
- }
-
- /* build a set from multiple subsets */
- UnicodeSet *set;
- const UnicodeSet *other;
-
- set=new UnicodeSet();
- if(set==NULL) {
- errorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
-
- if((options&UNORM_NX_HANGUL)!=0 && NULL!=(other=internalGetNXHangul(errorCode))) {
- set->addAll(*other);
- }
- if((options&UNORM_NX_CJK_COMPAT)!=0 && NULL!=(other=internalGetNXCJKCompat(errorCode))) {
- set->addAll(*other);
- }
- if((options&_NORM_OPTIONS_UNICODE_MASK)!=0 && NULL!=(other=internalGetNXUnicode(options, errorCode))) {
- set->addAll(*other);
- }
-
- if(U_FAILURE(errorCode)) {
- delete set;
- return NULL;
- }
-
- umtx_lock(NULL);
- if(nxCache[options]==NULL) {
- nxCache[options]=set;
- set=NULL;
- }
- umtx_unlock(NULL);
-
- delete set;
- }
-
- return nxCache[options];
-}
-
-static inline const UnicodeSet *
-getNX(int32_t options, UErrorCode &errorCode) {
- if(U_FAILURE(errorCode) || (options&=_NORM_OPTIONS_SETS_MASK)==0) {
- /* incoming failure, or no decomposition exclusions requested */
- return NULL;
- } else {
- return internalGetNX(options, errorCode);
- }
-}
-
-static inline UBool
-nx_contains(const UnicodeSet *nx, UChar32 c) {
- return nx!=NULL && nx->contains(c);
-}
-
-static inline UBool
-nx_contains(const UnicodeSet *nx, UChar c, UChar c2) {
- return nx!=NULL && nx->contains(c2==0 ? c : U16_GET_SUPPLEMENTARY(c, c2));
-}
-
-/* other normalization primitives ------------------------------------------- */
-
-/* get the canonical or compatibility decomposition for one character */
-static inline const UChar *
-_decompose(uint32_t norm32, uint32_t qcMask, int32_t &length,
- uint8_t &cc, uint8_t &trailCC) {
- const UChar *p=(const UChar *)_getExtraData(norm32);
- length=*p++;
-
- if((norm32&qcMask&_NORM_QC_NFKD)!=0 && length>=0x100) {
- /* use compatibility decomposition, skip canonical data */
- p+=((length>>7)&1)+(length&_NORM_DECOMP_LENGTH_MASK);
- length>>=8;
- }
-
- if(length&_NORM_DECOMP_FLAG_LENGTH_HAS_CC) {
- /* get the lead and trail cc's */
- UChar bothCCs=*p++;
- cc=(uint8_t)(bothCCs>>8);
- trailCC=(uint8_t)bothCCs;
- } else {
- /* lead and trail cc's are both 0 */
- cc=trailCC=0;
- }
-
- length&=_NORM_DECOMP_LENGTH_MASK;
- return p;
-}
-
-/* get the canonical decomposition for one character */
-static inline const UChar *
-_decompose(uint32_t norm32, int32_t &length,
- uint8_t &cc, uint8_t &trailCC) {
- const UChar *p=(const UChar *)_getExtraData(norm32);
- length=*p++;
-
- if(length&_NORM_DECOMP_FLAG_LENGTH_HAS_CC) {
- /* get the lead and trail cc's */
- UChar bothCCs=*p++;
- cc=(uint8_t)(bothCCs>>8);
- trailCC=(uint8_t)bothCCs;
- } else {
- /* lead and trail cc's are both 0 */
- cc=trailCC=0;
- }
-
- length&=_NORM_DECOMP_LENGTH_MASK;
- return p;
-}
-
-/**
- * Get the canonical decomposition for one code point.
- * @param c code point
- * @param buffer out-only buffer for algorithmic decompositions of Hangul
- * @param length out-only, takes the length of the decomposition, if any
- * @return pointer to decomposition, or 0 if none
- * @internal
- */
-static const UChar *
-_decompose(UChar32 c, UChar buffer[4], int32_t &length) {
- uint32_t norm32;
-
- UTRIE_GET32(&normTrie, c, norm32);
- if(norm32&_NORM_QC_NFD) {
- if(isNorm32HangulOrJamo(norm32)) {
- /* Hangul syllable: decompose algorithmically */
- UChar c2;
-
- c-=HANGUL_BASE;
-
- c2=(UChar)(c%JAMO_T_COUNT);
- c/=JAMO_T_COUNT;
- if(c2>0) {
- buffer[2]=(UChar)(JAMO_T_BASE+c2);
- length=3;
- } else {
- length=2;
- }
-
- buffer[1]=(UChar)(JAMO_V_BASE+c%JAMO_V_COUNT);
- buffer[0]=(UChar)(JAMO_L_BASE+c/JAMO_V_COUNT);
- return buffer;
- } else {
- /* normal decomposition */
- uint8_t cc, trailCC;
- return _decompose(norm32, length, cc, trailCC);
- }
- } else {
- return 0;
- }
-}
+#include "unicode/unorm2.h"
+#include "normalizer2impl.h"
+#include "unormimp.h"
+#include "uprops.h"
+#include "ustr_imp.h"
-/*
- * get the combining class of (c, c2)=*p++
- * before: p<limit after: p<=limit
- * if only one code unit is used, then c2==0
- */
-static inline uint8_t
-_getNextCC(const UChar *&p, const UChar *limit, UChar &c, UChar &c2) {
- uint32_t norm32;
+U_NAMESPACE_USE
- c=*p++;
- norm32=_getNorm32(c);
- if((norm32&_NORM_CC_MASK)==0) {
- c2=0;
- return 0;
- } else {
- if(!isNorm32LeadSurrogate(norm32)) {
- c2=0;
- } else {
- /* c is a lead surrogate, get the real norm32 */
- if(p!=limit && UTF_IS_SECOND_SURROGATE(c2=*p)) {
- ++p;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- c2=0;
- return 0;
- }
- }
+/* quick check functions ---------------------------------------------------- */
- return (uint8_t)(norm32>>_NORM_CC_SHIFT);
- }
+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);
}
-/*
- * read backwards and get norm32
- * return 0 if the character is <minC
- * if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first surrogate but read second!)
- */
-static inline uint32_t
-_getPrevNorm32(const UChar *start, const UChar *&src,
- uint32_t minC, uint32_t mask,
- UChar &c, UChar &c2) {
- uint32_t norm32;
-
- c=*--src;
- c2=0;
-
- /* check for a surrogate before getting norm32 to see if we need to predecrement further */
- if(c<minC) {
- return 0;
- } else if(!UTF_IS_SURROGATE(c)) {
- return _getNorm32(c);
- } else if(UTF_IS_SURROGATE_FIRST(c)) {
- /* unpaired first surrogate */
- return 0;
- } else if(src!=start && UTF_IS_FIRST_SURROGATE(c2=*(src-1))) {
- --src;
- norm32=_getNorm32(c2);
-
- if((norm32&mask)==0) {
- /* all surrogate pairs with this lead surrogate have only irrelevant data */
- return 0;
- } else {
- /* norm32 must be a surrogate special */
- return _getNorm32FromSurrogatePair(norm32, c);
- }
+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 {
- /* unpaired second surrogate */
- c2=0;
- return 0;
+ return unorm2_quickCheck((const UNormalizer2 *)n2, src, srcLength, pErrorCode);
}
}
-/*
- * get the combining class of (c, c2)=*--p
- * before: start<p after: start<=p
- */
-static inline uint8_t
-_getPrevCC(const UChar *start, const UChar *&p) {
- UChar c, c2;
-
- return (uint8_t)(_getPrevNorm32(start, p, _NORM_MIN_WITH_LEAD_CC, _NORM_CC_MASK, c, c2)>>_NORM_CC_SHIFT);
-}
-
-/*
- * is this a safe boundary character for NF*D?
- * (lead cc==0)
- */
-static inline UBool
-_isNFDSafe(uint32_t norm32, uint32_t ccOrQCMask, uint32_t decompQCMask) {
- if((norm32&ccOrQCMask)==0) {
- return TRUE; /* cc==0 and no decomposition: this is NF*D safe */
- }
-
- /* inspect its decomposition - maybe a Hangul but not a surrogate here */
- if(isNorm32Regular(norm32) && (norm32&decompQCMask)!=0) {
- int32_t length;
- uint8_t cc, trailCC;
-
- /* decomposes, get everything from the variable-length extra data */
- _decompose(norm32, decompQCMask, length, cc, trailCC);
- return cc==0;
- } else {
- /* no decomposition (or Hangul), test the cc directly */
- return (norm32&_NORM_CC_MASK)==0;
- }
-}
-
-/*
- * is this (or does its decomposition begin with) a "true starter"?
- * (cc==0 and NF*C_YES)
- */
-static inline UBool
-_isTrueStarter(uint32_t norm32, uint32_t ccOrQCMask, uint32_t decompQCMask) {
- if((norm32&ccOrQCMask)==0) {
- return TRUE; /* this is a true starter (could be Hangul or Jamo L) */
- }
-
- /* inspect its decomposition - not a Hangul or a surrogate here */
- if((norm32&decompQCMask)!=0) {
- const UChar *p;
- int32_t length;
- uint8_t cc, trailCC;
-
- /* decomposes, get everything from the variable-length extra data */
- p=_decompose(norm32, decompQCMask, length, cc, trailCC);
- if(cc==0) {
- uint32_t qcMask=ccOrQCMask&_NORM_QC_MASK;
-
- /* does it begin with NFC_YES? */
- if((_getNorm32(p, qcMask)&qcMask)==0) {
- /* yes, the decomposition begins with a true starter */
- return TRUE;
- }
- }
- }
- return FALSE;
-}
-
-/* uchar.h */
-U_CAPI uint8_t U_EXPORT2
-u_getCombiningClass(UChar32 c) {
- UErrorCode errorCode=U_ZERO_ERROR;
- if(_haveData(errorCode)) {
- uint32_t norm32;
-
- UTRIE_GET32(&normTrie, c, norm32);
- return (uint8_t)(norm32>>_NORM_CC_SHIFT);
- } else {
- return 0;
- }
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_internalIsFullCompositionExclusion(UChar32 c) {
- UErrorCode errorCode=U_ZERO_ERROR;
- if(_haveData(errorCode) && formatVersion_2_1) {
- uint16_t aux;
-
- UTRIE_GET16(&auxTrie, c, aux);
- return (UBool)((aux&_NORM_AUX_COMP_EX_MASK)!=0);
- } else {
- return FALSE;
- }
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_isCanonSafeStart(UChar32 c) {
- UErrorCode errorCode=U_ZERO_ERROR;
- if(_haveData(errorCode) && formatVersion_2_1) {
- uint16_t aux;
-
- UTRIE_GET16(&auxTrie, c, aux);
- return (UBool)((aux&_NORM_AUX_UNSAFE_MASK)==0);
- } else {
- return FALSE;
- }
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_getCanonStartSet(UChar32 c, USerializedSet *fillSet) {
- UErrorCode errorCode=U_ZERO_ERROR;
- if( fillSet!=NULL && (uint32_t)c<=0x10ffff &&
- _haveData(errorCode) && canonStartSets!=NULL
- ) {
- const uint16_t *table;
- int32_t i, start, limit;
-
- /*
- * binary search for c
- *
- * There are two search tables,
- * one for BMP code points and one for supplementary ones.
- * See unormimp.h for details.
- */
- if(c<=0xffff) {
- table=canonStartSets+canonStartSets[_NORM_SET_INDEX_CANON_SETS_LENGTH];
- start=0;
- limit=canonStartSets[_NORM_SET_INDEX_CANON_BMP_TABLE_LENGTH];
-
- /* each entry is a pair { c, result } */
- while(start<limit-2) {
- i=(uint16_t)(((start+limit)/4)*2); /* (start+limit)/2 and address pairs */
- if(c<table[i]) {
- limit=i;
- } else {
- start=i;
- }
- }
-
- /* found? */
- if(c==table[start]) {
- i=table[start+1];
- if((i&_NORM_CANON_SET_BMP_MASK)==_NORM_CANON_SET_BMP_IS_INDEX) {
- /* result 01xxxxxx xxxxxx contains index x to a USerializedSet */
- i&=(_NORM_MAX_CANON_SETS-1);
- return uset_getSerializedSet(fillSet,
- canonStartSets+i,
- canonStartSets[_NORM_SET_INDEX_CANON_SETS_LENGTH]-i);
- } else {
- /* other result values are BMP code points for single-code point sets */
- uset_setSerializedToOne(fillSet, (UChar32)i);
- return TRUE;
- }
- }
- } else {
- uint16_t high, low, h;
-
- table=canonStartSets+canonStartSets[_NORM_SET_INDEX_CANON_SETS_LENGTH]+
- canonStartSets[_NORM_SET_INDEX_CANON_BMP_TABLE_LENGTH];
- start=0;
- limit=canonStartSets[_NORM_SET_INDEX_CANON_SUPP_TABLE_LENGTH];
-
- high=(uint16_t)(c>>16);
- low=(uint16_t)c;
-
- /* each entry is a triplet { high(c), low(c), result } */
- while(start<limit-3) {
- i=(uint16_t)(((start+limit)/6)*3); /* (start+limit)/2 and address triplets */
- h=table[i]&0x1f; /* high word */
- if(high<h || (high==h && low<table[i+1])) {
- limit=i;
- } else {
- start=i;
- }
- }
-
- /* found? */
- h=table[start];
- if(high==(h&0x1f) && low==table[start+1]) {
- i=table[start+2];
- if((h&0x8000)==0) {
- /* the result is an index to a USerializedSet */
- return uset_getSerializedSet(fillSet,
- canonStartSets+i,
- canonStartSets[_NORM_SET_INDEX_CANON_SETS_LENGTH]-i);
- } else {
- /*
- * single-code point set {x} in
- * triplet { 100xxxxx 000hhhhh llllllll llllllll xxxxxxxx xxxxxxxx }
- */
- i|=((int32_t)h&0x1f00)<<8; /* add high bits from high(c) */
- uset_setSerializedToOne(fillSet, (UChar32)i);
- return TRUE;
- }
- }
- }
- }
-
- return FALSE; /* not found */
-}
-
-U_CAPI int32_t U_EXPORT2
-u_getFC_NFKC_Closure(UChar32 c, UChar *dest, int32_t destCapacity, UErrorCode *pErrorCode) {
- uint16_t aux;
-
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return 0;
- }
- if(destCapacity<0 || (dest==NULL && destCapacity>0)) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
- if(!_haveData(*pErrorCode) || !formatVersion_2_1) {
- return 0;
- }
-
- UTRIE_GET16(&auxTrie, c, aux);
- aux&=_NORM_AUX_FNC_MASK;
- if(aux!=0) {
- const UChar *s;
- int32_t length;
-
- s=(const UChar *)(extraData+aux);
- if(*s<0xff00) {
- /* s points to the single-unit string */
- length=1;
- } else {
- length=*s&0xff;
- ++s;
- }
- if(0<length && length<=destCapacity) {
- uprv_memcpy(dest, s, length*U_SIZEOF_UCHAR);
- }
- return u_terminateUChars(dest, destCapacity, length, pErrorCode);
- } else {
- return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
- }
-}
-
-/* Is c an NF<mode>-skippable code point? See unormimp.h. */
-U_CAPI UBool U_EXPORT2
-unorm_isNFSkippable(UChar32 c, UNormalizationMode mode) {
- UErrorCode errorCode;
- uint32_t norm32, mask;
- uint16_t aux, fcd;
-
- errorCode=U_ZERO_ERROR;
- if(!_haveData(errorCode)) {
- return FALSE;
- }
-
- /* handle trivial cases; set the comparison mask for the normal ones */
- switch(mode) {
- case UNORM_NONE:
- return TRUE;
- case UNORM_NFD:
- mask=_NORM_CC_MASK|_NORM_QC_NFD;
- break;
- case UNORM_NFKD:
- mask=_NORM_CC_MASK|_NORM_QC_NFKD;
- break;
- case UNORM_NFC:
- /* case UNORM_FCC: */
- mask=_NORM_CC_MASK|_NORM_COMBINES_ANY|(_NORM_QC_NFC&_NORM_QC_ANY_NO);
- break;
- case UNORM_NFKC:
- mask=_NORM_CC_MASK|_NORM_COMBINES_ANY|(_NORM_QC_NFKC&_NORM_QC_ANY_NO);
- break;
- case UNORM_FCD:
- /* FCD: skippable if lead cc==0 and trail cc<=1 */
- UTRIE_GET16(&fcdTrie, c, fcd);
- return fcd<=1;
- default:
- return FALSE;
- }
-
- /* check conditions (a)..(e), see unormimp.h */
- UTRIE_GET32(&normTrie, c, norm32);
- if((norm32&mask)!=0) {
- return FALSE; /* fails (a)..(e), not skippable */
- }
-
- if(mode<UNORM_NFC) {
- return TRUE; /* NF*D, passed (a)..(c), is skippable */
- }
-
- /* NF*C/FCC, passed (a)..(e) */
- if((norm32&_NORM_QC_NFD)==0) {
- return TRUE; /* no canonical decomposition, is skippable */
- }
-
- /* check Hangul syllables algorithmically */
- if(isNorm32HangulOrJamo(norm32)) {
- /* Jamo passed (a)..(e) above, must be Hangul */
- return !isHangulWithoutJamoT((UChar)c); /* LVT are skippable, LV are not */
- }
-
- /* if(mode<=UNORM_NFKC) { -- enable when implementing FCC */
- /* NF*C, test (f) flag */
- if(!formatVersion_2_2) {
- return FALSE; /* no (f) data, say not skippable to be safe */
- }
-
- UTRIE_GET16(&auxTrie, c, aux);
- return (aux&_NORM_AUX_NFC_SKIP_F_MASK)==0; /* TRUE=skippable if the (f) flag is not set */
-
- /* } else { FCC, test fcd<=1 instead of the above } */
-}
-
-U_CAPI void U_EXPORT2
-unorm_addPropertyStarts(USet *set, UErrorCode *pErrorCode) {
- UChar c;
-
- if(!_haveData(*pErrorCode)) {
- return;
- }
-
- /* add the start code point of each same-value range of each trie */
- utrie_enum(&normTrie, NULL, _enumPropertyStartsRange, set);
- utrie_enum(&fcdTrie, NULL, _enumPropertyStartsRange, set);
- if(formatVersion_2_1) {
- utrie_enum(&auxTrie, NULL, _enumPropertyStartsRange, set);
- }
-
- /* add Hangul LV syllables and LV+1 because of skippables */
- for(c=HANGUL_BASE; c<HANGUL_BASE+HANGUL_COUNT; c+=JAMO_T_COUNT) {
- uset_add(set, c);
- uset_add(set, c+1);
- }
- uset_add(set, HANGUL_BASE+HANGUL_COUNT); /* add Hangul+1 to continue with other properties */
-}
-
-/* reorder UTF-16 in-place -------------------------------------------------- */
-
-/*
- * simpler, single-character version of _mergeOrdered() -
- * bubble-insert one single code point into the preceding string
- * which is already canonically ordered
- * (c, c2) may or may not yet have been inserted at [current..p[
- *
- * it must be p=current+lengthof(c, c2) i.e. p=current+(c2==0 ? 1 : 2)
- *
- * before: [start..current[ is already ordered, and
- * [current..p[ may or may not hold (c, c2) but
- * must be exactly the same length as (c, c2)
- * after: [start..p[ is ordered
- *
- * returns the trailing combining class
- */
-static uint8_t
-_insertOrdered(const UChar *start, UChar *current, UChar *p,
- UChar c, UChar c2, uint8_t cc) {
- const UChar *pBack, *pPreBack;
- UChar *r;
- uint8_t prevCC, trailCC=cc;
-
- if(start<current && cc!=0) {
- /* search for the insertion point where cc>=prevCC */
- pPreBack=pBack=current;
- prevCC=_getPrevCC(start, pPreBack);
- if(cc<prevCC) {
- /* this will be the last code point, so keep its cc */
- trailCC=prevCC;
- pBack=pPreBack;
- while(start<pPreBack) {
- prevCC=_getPrevCC(start, pPreBack);
- if(cc>=prevCC) {
- break;
- }
- pBack=pPreBack;
- }
-
- /*
- * this is where we are right now with all these pointers:
- * [start..pPreBack[ 0..? code points that we can ignore
- * [pPreBack..pBack[ 0..1 code points with prevCC<=cc
- * [pBack..current[ 0..n code points with >cc, move up to insert (c, c2)
- * [current..p[ 1 code point (c, c2) with cc
- */
-
- /* move the code units in between up */
- r=p;
- do {
- *--r=*--current;
- } while(pBack!=current);
- }
- }
-
- /* insert (c, c2) */
- *current=c;
- if(c2!=0) {
- *(current+1)=c2;
- }
-
- /* we know the cc of the last code point */
- return trailCC;
-}
-
-/*
- * merge two UTF-16 string parts together
- * to canonically order (order by combining classes) their concatenation
- *
- * the two strings may already be adjacent, so that the merging is done in-place
- * if the two strings are not adjacent, then the buffer holding the first one
- * must be large enough
- * the second string may or may not be ordered in itself
- *
- * before: [start..current[ is already ordered, and
- * [next..limit[ may be ordered in itself, but
- * is not in relation to [start..current[
- * after: [start..current+(limit-next)[ is ordered
- *
- * the algorithm is a simple bubble-sort that takes the characters from *next++
- * and inserts them in correct combining class order into the preceding part
- * of the string
- *
- * since this function is called much less often than the single-code point
- * _insertOrdered(), it just uses that for easier maintenance
- * (see file version from before 2001aug31 for a more optimized version)
- *
- * returns the trailing combining class
- */
-static uint8_t
-_mergeOrdered(UChar *start, UChar *current,
- const UChar *next, const UChar *limit, UBool isOrdered=TRUE) {
- UChar *r;
- UChar c, c2;
- uint8_t cc, trailCC=0;
- UBool adjacent;
-
- adjacent= current==next;
-
- if(start!=current || !isOrdered) {
- while(next<limit) {
- cc=_getNextCC(next, limit, c, c2);
- if(cc==0) {
- /* does not bubble back */
- trailCC=0;
- if(adjacent) {
- current=(UChar *)next;
- } else {
- *current++=c;
- if(c2!=0) {
- *current++=c2;
- }
- }
- if(isOrdered) {
- break;
- } else {
- start=current;
- }
- } else {
- r=current+(c2==0 ? 1 : 2);
- trailCC=_insertOrdered(start, current, r, c, c2, cc);
- current=r;
- }
- }
- }
-
- if(next==limit) {
- /* we know the cc of the last code point */
- return trailCC;
- } else {
- if(!adjacent) {
- /* copy the second string part */
- do {
- *current++=*next++;
- } while(next!=limit);
- limit=current;
- }
- return _getPrevCC(start, limit);
- }
-}
-
-/* quick check functions ---------------------------------------------------- */
-
-static UBool
-unorm_checkFCD(const UChar *src, int32_t srcLength, const UnicodeSet *nx) {
- const UChar *limit;
- UChar c, c2;
- uint16_t fcd16;
- int16_t prevCC, cc;
-
- /* initialize */
- prevCC=0;
-
- if(srcLength>=0) {
- /* string with length */
- limit=src+srcLength;
- } else /* srcLength==-1 */ {
- /* zero-terminated string */
- limit=NULL;
- }
-
- U_ALIGN_CODE(16);
-
- for(;;) {
- /* skip a run of code units below the minimum or with irrelevant data for the FCD check */
- if(limit==NULL) {
- for(;;) {
- c=*src++;
- if(c<_NORM_MIN_WITH_LEAD_CC) {
- if(c==0) {
- return TRUE;
- }
- /*
- * delay _getFCD16(c) for any character <_NORM_MIN_WITH_LEAD_CC
- * because chances are good that the next one will have
- * a leading cc of 0;
- * _getFCD16(-prevCC) is later called when necessary -
- * -c fits into int16_t because it is <_NORM_MIN_WITH_LEAD_CC==0x300
- */
- prevCC=(int16_t)-c;
- } else if((fcd16=_getFCD16(c))==0) {
- prevCC=0;
- } else {
- break;
- }
- }
- } else {
- for(;;) {
- if(src==limit) {
- return TRUE;
- } else if((c=*src++)<_NORM_MIN_WITH_LEAD_CC) {
- prevCC=(int16_t)-c;
- } else if((fcd16=_getFCD16(c))==0) {
- prevCC=0;
- } else {
- break;
- }
- }
- }
-
- /* check one above-minimum, relevant code unit */
- if(UTF_IS_FIRST_SURROGATE(c)) {
- /* c is a lead surrogate, get the real fcd16 */
- if(src!=limit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- fcd16=_getFCD16FromSurrogatePair(fcd16, c2);
- } else {
- c2=0;
- fcd16=0;
- }
- } else {
- c2=0;
- }
-
- if(nx_contains(nx, c, c2)) {
- prevCC=0; /* excluded: fcd16==0 */
- continue;
- }
-
- /*
- * prevCC has values from the following ranges:
- * 0..0xff - the previous trail combining class
- * <0 - the negative value of the previous code unit;
- * that code unit was <_NORM_MIN_WITH_LEAD_CC and its _getFCD16()
- * was deferred so that average text is checked faster
- */
-
- /* check the combining order */
- cc=(int16_t)(fcd16>>8);
- if(cc!=0) {
- if(prevCC<0) {
- /* the previous character was <_NORM_MIN_WITH_LEAD_CC, we need to get its trail cc */
- if(!nx_contains(nx, (UChar32)-prevCC)) {
- prevCC=(int16_t)(_getFCD16((UChar)-prevCC)&0xff);
- } else {
- prevCC=0; /* excluded: fcd16==0 */
- }
- }
-
- if(cc<prevCC) {
- return FALSE;
- }
- }
- prevCC=(int16_t)(fcd16&0xff);
- }
-}
-
-static UNormalizationCheckResult
-_quickCheck(const UChar *src,
- int32_t srcLength,
- UNormalizationMode mode,
- UBool allowMaybe,
- const UnicodeSet *nx,
- UErrorCode *pErrorCode) {
- UChar stackBuffer[_STACK_BUFFER_CAPACITY];
- UChar *buffer;
- int32_t bufferCapacity;
-
- const UChar *start, *limit;
- uint32_t norm32, qcNorm32, ccOrQCMask, qcMask;
- UChar c, c2, minNoMaybe;
- uint8_t cc, prevCC;
- UNormalizationCheckResult result;
-
- /* check arguments */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return UNORM_MAYBE;
- }
-
- if(src==NULL || srcLength<-1) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return UNORM_MAYBE;
- }
-
- if(!_haveData(*pErrorCode)) {
- return UNORM_MAYBE;
- }
-
- /* check for a valid mode and set the quick check minimum and mask */
- switch(mode) {
- case UNORM_NFC:
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFC_NO_MAYBE];
- qcMask=_NORM_QC_NFC;
- break;
- case UNORM_NFKC:
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFKC_NO_MAYBE];
- qcMask=_NORM_QC_NFKC;
- break;
- case UNORM_NFD:
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFD_NO_MAYBE];
- qcMask=_NORM_QC_NFD;
- break;
- case UNORM_NFKD:
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFKD_NO_MAYBE];
- qcMask=_NORM_QC_NFKD;
- break;
- case UNORM_FCD:
- return unorm_checkFCD(src, srcLength, nx) ? UNORM_YES : UNORM_NO;
- default:
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return UNORM_MAYBE;
- }
-
- /* initialize */
- buffer=stackBuffer;
- bufferCapacity=_STACK_BUFFER_CAPACITY;
-
- ccOrQCMask=_NORM_CC_MASK|qcMask;
- result=UNORM_YES;
- prevCC=0;
-
- start=src;
- if(srcLength>=0) {
- /* string with length */
- limit=src+srcLength;
- } else /* srcLength==-1 */ {
- /* zero-terminated string */
- limit=NULL;
- }
-
- U_ALIGN_CODE(16);
-
- for(;;) {
- /* skip a run of code units below the minimum or with irrelevant data for the quick check */
- if(limit==NULL) {
- for(;;) {
- c=*src++;
- if(c<minNoMaybe) {
- if(c==0) {
- goto endloop; /* break out of outer loop */
- }
- } else if(((norm32=_getNorm32(c))&ccOrQCMask)!=0) {
- break;
- }
- prevCC=0;
- }
- } else {
- for(;;) {
- if(src==limit) {
- goto endloop; /* break out of outer loop */
- } else if((c=*src++)>=minNoMaybe && ((norm32=_getNorm32(c))&ccOrQCMask)!=0) {
- break;
- }
- prevCC=0;
- }
- }
-
- /* check one above-minimum, relevant code unit */
- if(isNorm32LeadSurrogate(norm32)) {
- /* c is a lead surrogate, get the real norm32 */
- if(src!=limit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- c2=0;
- norm32=0;
- }
- } else {
- c2=0;
- }
-
- if(nx_contains(nx, c, c2)) {
- /* excluded: norm32==0 */
- norm32=0;
- }
-
- /* check the combining order */
- cc=(uint8_t)(norm32>>_NORM_CC_SHIFT);
- if(cc!=0 && cc<prevCC) {
- result=UNORM_NO;
- break;
- }
- prevCC=cc;
-
- /* check for "no" or "maybe" quick check flags */
- qcNorm32=norm32&qcMask;
- if(qcNorm32&_NORM_QC_ANY_NO) {
- result=UNORM_NO;
- break;
- } else if(qcNorm32!=0) {
- /* "maybe" can only occur for NFC and NFKC */
- if(allowMaybe) {
- result=UNORM_MAYBE;
- } else {
- /* normalize a section around here to see if it is really normalized or not */
- const UChar *prevStarter;
- uint32_t decompQCMask;
- int32_t length;
-
- decompQCMask=(qcMask<<2)&0xf; /* decomposition quick check mask */
-
- /* find the previous starter */
- prevStarter=src-1; /* set prevStarter to the beginning of the current character */
- if(UTF_IS_TRAIL(*prevStarter)) {
- --prevStarter; /* safe because unpaired surrogates do not result in "maybe" */
- }
- prevStarter=_findPreviousStarter(start, prevStarter, ccOrQCMask, decompQCMask, minNoMaybe);
-
- /* find the next true starter in [src..limit[ - modifies src to point to the next starter */
- src=_findNextStarter(src, limit, qcMask, decompQCMask, minNoMaybe);
-
- /* decompose and recompose [prevStarter..src[ */
- _composePart(stackBuffer, buffer, bufferCapacity,
- length,
- prevStarter,
- src,
- qcMask,
- prevCC, nx, pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- result=UNORM_MAYBE; /* error (out of memory) */
- break;
- }
-
- /* compare the normalized version with the original */
- if(0!=uprv_strCompare(prevStarter, (int32_t)(src-prevStarter), buffer, length, FALSE, FALSE)) {
- result=UNORM_NO; /* normalization differs */
- break;
- }
-
- /* continue after the next starter */
- }
- }
- }
-endloop:
-
- if(buffer!=stackBuffer) {
- uprv_free(buffer);
- }
-
- return result;
-}
-
-U_CAPI UNormalizationCheckResult U_EXPORT2
-unorm_quickCheck(const UChar *src,
- int32_t srcLength,
- UNormalizationMode mode,
- UErrorCode *pErrorCode) {
- return _quickCheck(src, srcLength, mode, TRUE, NULL, pErrorCode);
-}
-
-U_CAPI UNormalizationCheckResult U_EXPORT2
-unorm_quickCheckWithOptions(const UChar *src, int32_t srcLength,
- UNormalizationMode mode, int32_t options,
- UErrorCode *pErrorCode) {
- return _quickCheck(src, srcLength, mode, TRUE, getNX(options, *pErrorCode), pErrorCode);
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_isNormalized(const UChar *src, int32_t srcLength,
- UNormalizationMode mode,
- UErrorCode *pErrorCode) {
- return (UBool)(UNORM_YES==_quickCheck(src, srcLength, mode, FALSE, NULL, pErrorCode));
-}
-
-U_CAPI UBool U_EXPORT2
-unorm_isNormalizedWithOptions(const UChar *src, int32_t srcLength,
- UNormalizationMode mode, int32_t options,
- UErrorCode *pErrorCode) {
- return (UBool)(UNORM_YES==_quickCheck(src, srcLength, mode, FALSE, getNX(options, *pErrorCode), pErrorCode));
-}
-
-/* make NFD & NFKD ---------------------------------------------------------- */
-
-U_CAPI int32_t U_EXPORT2
-unorm_getDecomposition(UChar32 c, UBool compat,
- UChar *dest, int32_t destCapacity) {
- UErrorCode errorCode=U_ZERO_ERROR;
- if( (uint32_t)c<=0x10ffff &&
- _haveData(errorCode) &&
- ((dest!=NULL && destCapacity>0) || destCapacity==0)
- ) {
- uint32_t norm32, qcMask;
- UChar32 minNoMaybe;
- int32_t length;
-
- /* initialize */
- if(!compat) {
- minNoMaybe=(UChar32)indexes[_NORM_INDEX_MIN_NFD_NO_MAYBE];
- qcMask=_NORM_QC_NFD;
- } else {
- minNoMaybe=(UChar32)indexes[_NORM_INDEX_MIN_NFKD_NO_MAYBE];
- qcMask=_NORM_QC_NFKD;
- }
-
- if(c<minNoMaybe) {
- /* trivial case */
- if(destCapacity>0) {
- dest[0]=(UChar)c;
- }
- return -1;
- }
-
- /* data lookup */
- UTRIE_GET32(&normTrie, c, norm32);
- if((norm32&qcMask)==0) {
- /* simple case: no decomposition */
- if(c<=0xffff) {
- if(destCapacity>0) {
- dest[0]=(UChar)c;
- }
- return -1;
- } else {
- if(destCapacity>=2) {
- dest[0]=UTF16_LEAD(c);
- dest[1]=UTF16_TRAIL(c);
- }
- return -2;
- }
- } else if(isNorm32HangulOrJamo(norm32)) {
- /* Hangul syllable: decompose algorithmically */
- UChar c2;
-
- c-=HANGUL_BASE;
-
- c2=(UChar)(c%JAMO_T_COUNT);
- c/=JAMO_T_COUNT;
- if(c2>0) {
- if(destCapacity>=3) {
- dest[2]=(UChar)(JAMO_T_BASE+c2);
- }
- length=3;
- } else {
- length=2;
- }
-
- if(destCapacity>=2) {
- dest[1]=(UChar)(JAMO_V_BASE+c%JAMO_V_COUNT);
- dest[0]=(UChar)(JAMO_L_BASE+c/JAMO_V_COUNT);
- }
- return length;
- } else {
- /* c decomposes, get everything from the variable-length extra data */
- const UChar *p, *limit;
- uint8_t cc, trailCC;
-
- p=_decompose(norm32, qcMask, length, cc, trailCC);
- if(length<=destCapacity) {
- limit=p+length;
- do {
- *dest++=*p++;
- } while(p<limit);
- }
- return length;
- }
- } else {
- return 0;
- }
-}
-
-static int32_t
-_decompose(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UBool compat, const UnicodeSet *nx,
- uint8_t &outTrailCC) {
- UChar buffer[3];
- const UChar *limit, *prevSrc, *p;
- uint32_t norm32, ccOrQCMask, qcMask;
- int32_t destIndex, reorderStartIndex, length;
- UChar c, c2, minNoMaybe;
- uint8_t cc, prevCC, trailCC;
-
- if(!compat) {
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFD_NO_MAYBE];
- qcMask=_NORM_QC_NFD;
- } else {
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFKD_NO_MAYBE];
- qcMask=_NORM_QC_NFKD;
- }
-
- /* initialize */
- ccOrQCMask=_NORM_CC_MASK|qcMask;
- destIndex=reorderStartIndex=0;
- prevCC=0;
-
- /* avoid compiler warnings */
- norm32=0;
- c=0;
-
- if(srcLength>=0) {
- /* string with length */
- limit=src+srcLength;
- } else /* srcLength==-1 */ {
- /* zero-terminated string */
- limit=NULL;
- }
-
- U_ALIGN_CODE(16);
-
- for(;;) {
- /* count code units below the minimum or with irrelevant data for the quick check */
- prevSrc=src;
- if(limit==NULL) {
- while((c=*src)<minNoMaybe ? c!=0 : ((norm32=_getNorm32(c))&ccOrQCMask)==0) {
- prevCC=0;
- ++src;
- }
- } else {
- while(src!=limit && ((c=*src)<minNoMaybe || ((norm32=_getNorm32(c))&ccOrQCMask)==0)) {
- prevCC=0;
- ++src;
- }
- }
-
- /* copy these code units all at once */
- if(src!=prevSrc) {
- length=(int32_t)(src-prevSrc);
- if((destIndex+length)<=destCapacity) {
- uprv_memcpy(dest+destIndex, prevSrc, length*U_SIZEOF_UCHAR);
- }
- destIndex+=length;
- reorderStartIndex=destIndex;
- }
-
- /* end of source reached? */
- if(limit==NULL ? c==0 : src==limit) {
- break;
- }
-
- /* c already contains *src and norm32 is set for it, increment src */
- ++src;
-
- /* check one above-minimum, relevant code unit */
- /*
- * generally, set p and length to the decomposition string
- * in simple cases, p==NULL and (c, c2) will hold the length code units to append
- * in all cases, set cc to the lead and trailCC to the trail combining class
- *
- * the following merge-sort of the current character into the preceding,
- * canonically ordered result text will use the optimized _insertOrdered()
- * if there is only one single code point to process;
- * this is indicated with p==NULL, and (c, c2) is the character to insert
- * ((c, 0) for a BMP character and (lead surrogate, trail surrogate)
- * for a supplementary character)
- * otherwise, p[length] is merged in with _mergeOrdered()
- */
- if(isNorm32HangulOrJamo(norm32)) {
- if(nx_contains(nx, c)) {
- c2=0;
- p=NULL;
- length=1;
- } else {
- /* Hangul syllable: decompose algorithmically */
- p=buffer;
- cc=trailCC=0;
-
- c-=HANGUL_BASE;
-
- c2=(UChar)(c%JAMO_T_COUNT);
- c/=JAMO_T_COUNT;
- if(c2>0) {
- buffer[2]=(UChar)(JAMO_T_BASE+c2);
- length=3;
- } else {
- length=2;
- }
-
- buffer[1]=(UChar)(JAMO_V_BASE+c%JAMO_V_COUNT);
- buffer[0]=(UChar)(JAMO_L_BASE+c/JAMO_V_COUNT);
- }
- } else {
- if(isNorm32Regular(norm32)) {
- c2=0;
- length=1;
- } else {
- /* c is a lead surrogate, get the real norm32 */
- if(src!=limit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- length=2;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- c2=0;
- length=1;
- norm32=0;
- }
- }
-
- /* get the decomposition and the lead and trail cc's */
- if(nx_contains(nx, c, c2)) {
- /* excluded: norm32==0 */
- cc=trailCC=0;
- p=NULL;
- } else if((norm32&qcMask)==0) {
- /* c does not decompose */
- cc=trailCC=(uint8_t)(norm32>>_NORM_CC_SHIFT);
- p=NULL;
- } else {
- /* c decomposes, get everything from the variable-length extra data */
- p=_decompose(norm32, qcMask, length, cc, trailCC);
- if(length==1) {
- /* fastpath a single code unit from decomposition */
- c=*p;
- c2=0;
- p=NULL;
- }
- }
- }
-
- /* append the decomposition to the destination buffer, assume length>0 */
- if((destIndex+length)<=destCapacity) {
- UChar *reorderSplit=dest+destIndex;
- if(p==NULL) {
- /* fastpath: single code point */
- if(cc!=0 && cc<prevCC) {
- /* (c, c2) is out of order with respect to the preceding text */
- destIndex+=length;
- trailCC=_insertOrdered(dest+reorderStartIndex, reorderSplit, dest+destIndex, c, c2, cc);
- } else {
- /* just append (c, c2) */
- dest[destIndex++]=c;
- if(c2!=0) {
- dest[destIndex++]=c2;
- }
- }
- } else {
- /* general: multiple code points (ordered by themselves) from decomposition */
- if(cc!=0 && cc<prevCC) {
- /* the decomposition is out of order with respect to the preceding text */
- destIndex+=length;
- trailCC=_mergeOrdered(dest+reorderStartIndex, reorderSplit, p, p+length);
- } else {
- /* just append the decomposition */
- do {
- dest[destIndex++]=*p++;
- } while(--length>0);
- }
- }
- } else {
- /* buffer overflow */
- /* keep incrementing the destIndex for preflighting */
- destIndex+=length;
- }
-
- prevCC=trailCC;
- if(prevCC==0) {
- reorderStartIndex=destIndex;
- }
- }
-
- outTrailCC=prevCC;
- return destIndex;
-}
-
-U_CAPI int32_t U_EXPORT2
-unorm_decompose(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UBool compat, int32_t options,
- UErrorCode *pErrorCode) {
- const UnicodeSet *nx;
- int32_t destIndex;
- uint8_t trailCC;
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
-
- nx=getNX(options, *pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- destIndex=_decompose(dest, destCapacity,
- src, srcLength,
- compat, nx,
- trailCC);
-
- return u_terminateUChars(dest, destCapacity, destIndex, pErrorCode);
-}
-
-/* make FCD ----------------------------------------------------------------- */
-
-static const UChar *
-_findSafeFCD(const UChar *src, const UChar *limit, uint16_t fcd16) {
- UChar c, c2;
-
- /*
- * find the first position in [src..limit[ after some cc==0 according to FCD data
- *
- * at the beginning of the loop, we have fcd16 from before src
- *
- * stop at positions:
- * - after trail cc==0
- * - at the end of the source
- * - before lead cc==0
- */
- for(;;) {
- /* stop if trail cc==0 for the previous character */
- if((fcd16&0xff)==0) {
- break;
- }
-
- /* get c=*src - stop at end of string */
- if(src==limit) {
- break;
- }
- c=*src;
-
- /* stop if lead cc==0 for this character */
- if(c<_NORM_MIN_WITH_LEAD_CC || (fcd16=_getFCD16(c))==0) {
- break; /* catches terminating NUL, too */
- }
-
- if(!UTF_IS_FIRST_SURROGATE(c)) {
- if(fcd16<=0xff) {
- break;
- }
- ++src;
- } else if((src+1)!=limit && (c2=*(src+1), UTF_IS_SECOND_SURROGATE(c2))) {
- /* c is a lead surrogate, get the real fcd16 */
- fcd16=_getFCD16FromSurrogatePair(fcd16, c2);
- if(fcd16<=0xff) {
- break;
- }
- src+=2;
- } else {
- /* c is an unpaired first surrogate, lead cc==0 */
- break;
- }
- }
-
- return src;
-}
-
-static uint8_t
-_decomposeFCD(const UChar *src, const UChar *decompLimit,
- UChar *dest, int32_t &destIndex, int32_t destCapacity,
- const UnicodeSet *nx) {
- const UChar *p;
- uint32_t norm32;
- int32_t reorderStartIndex, length;
- UChar c, c2;
- uint8_t cc, prevCC, trailCC;
-
- /*
- * canonically decompose [src..decompLimit[
- *
- * all characters in this range have some non-zero cc,
- * directly or in decomposition,
- * so that we do not need to check in the following for quick-check limits etc.
- *
- * there _are_ _no_ Hangul syllables or Jamos in here because they are FCD-safe (cc==0)!
- *
- * we also do not need to check for c==0 because we have an established decompLimit
- */
- reorderStartIndex=destIndex;
- prevCC=0;
-
- while(src<decompLimit) {
- c=*src++;
- norm32=_getNorm32(c);
- if(isNorm32Regular(norm32)) {
- c2=0;
- length=1;
- } else {
- /*
- * reminder: this function is called with [src..decompLimit[
- * not containing any Hangul/Jamo characters,
- * therefore the only specials are lead surrogates
- */
- /* c is a lead surrogate, get the real norm32 */
- if(src!=decompLimit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- length=2;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- c2=0;
- length=1;
- norm32=0;
- }
- }
-
- /* get the decomposition and the lead and trail cc's */
- if(nx_contains(nx, c, c2)) {
- /* excluded: norm32==0 */
- cc=trailCC=0;
- p=NULL;
- } else if((norm32&_NORM_QC_NFD)==0) {
- /* c does not decompose */
- cc=trailCC=(uint8_t)(norm32>>_NORM_CC_SHIFT);
- p=NULL;
- } else {
- /* c decomposes, get everything from the variable-length extra data */
- p=_decompose(norm32, length, cc, trailCC);
- if(length==1) {
- /* fastpath a single code unit from decomposition */
- c=*p;
- c2=0;
- p=NULL;
- }
- }
-
- /* append the decomposition to the destination buffer, assume length>0 */
- if((destIndex+length)<=destCapacity) {
- UChar *reorderSplit=dest+destIndex;
- if(p==NULL) {
- /* fastpath: single code point */
- if(cc!=0 && cc<prevCC) {
- /* (c, c2) is out of order with respect to the preceding text */
- destIndex+=length;
- trailCC=_insertOrdered(dest+reorderStartIndex, reorderSplit, dest+destIndex, c, c2, cc);
- } else {
- /* just append (c, c2) */
- dest[destIndex++]=c;
- if(c2!=0) {
- dest[destIndex++]=c2;
- }
- }
- } else {
- /* general: multiple code points (ordered by themselves) from decomposition */
- if(cc!=0 && cc<prevCC) {
- /* the decomposition is out of order with respect to the preceding text */
- destIndex+=length;
- trailCC=_mergeOrdered(dest+reorderStartIndex, reorderSplit, p, p+length);
- } else {
- /* just append the decomposition */
- do {
- dest[destIndex++]=*p++;
- } while(--length>0);
- }
- }
- } else {
- /* buffer overflow */
- /* keep incrementing the destIndex for preflighting */
- destIndex+=length;
- }
-
- prevCC=trailCC;
- if(prevCC==0) {
- reorderStartIndex=destIndex;
- }
- }
-
- return prevCC;
-}
-
-static int32_t
-unorm_makeFCD(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- const UnicodeSet *nx,
- UErrorCode *pErrorCode) {
- const UChar *limit, *prevSrc, *decompStart;
- int32_t destIndex, length;
- UChar c, c2;
- uint16_t fcd16;
- int16_t prevCC, cc;
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
-
- /* initialize */
- decompStart=src;
- destIndex=0;
- prevCC=0;
-
- /* avoid compiler warnings */
- c=0;
- fcd16=0;
-
- if(srcLength>=0) {
- /* string with length */
- limit=src+srcLength;
- } else /* srcLength==-1 */ {
- /* zero-terminated string */
- limit=NULL;
- }
-
- U_ALIGN_CODE(16);
-
- for(;;) {
- /* skip a run of code units below the minimum or with irrelevant data for the FCD check */
- prevSrc=src;
- if(limit==NULL) {
- for(;;) {
- c=*src;
- if(c<_NORM_MIN_WITH_LEAD_CC) {
- if(c==0) {
- break;
- }
- prevCC=(int16_t)-c;
- } else if((fcd16=_getFCD16(c))==0) {
- prevCC=0;
- } else {
- break;
- }
- ++src;
- }
- } else {
- for(;;) {
- if(src==limit) {
- break;
- } else if((c=*src)<_NORM_MIN_WITH_LEAD_CC) {
- prevCC=(int16_t)-c;
- } else if((fcd16=_getFCD16(c))==0) {
- prevCC=0;
- } else {
- break;
- }
- ++src;
- }
- }
-
- /*
- * prevCC has values from the following ranges:
- * 0..0xff - the previous trail combining class
- * <0 - the negative value of the previous code unit;
- * that code unit was <_NORM_MIN_WITH_LEAD_CC and its _getFCD16()
- * was deferred so that average text is checked faster
- */
-
- /* copy these code units all at once */
- if(src!=prevSrc) {
- length=(int32_t)(src-prevSrc);
- if((destIndex+length)<=destCapacity) {
- uprv_memcpy(dest+destIndex, prevSrc, length*U_SIZEOF_UCHAR);
- }
- destIndex+=length;
- prevSrc=src;
-
- /* prevCC<0 is only possible from the above loop, i.e., only if prevSrc<src */
- if(prevCC<0) {
- /* the previous character was <_NORM_MIN_WITH_LEAD_CC, we need to get its trail cc */
- if(!nx_contains(nx, (UChar32)-prevCC)) {
- prevCC=(int16_t)(_getFCD16((UChar)-prevCC)&0xff);
- } else {
- prevCC=0; /* excluded: fcd16==0 */
- }
-
- /*
- * set a pointer to this below-U+0300 character;
- * if prevCC==0 then it will moved to after this character below
- */
- decompStart=prevSrc-1;
- }
- }
- /*
- * now:
- * prevSrc==src - used later to adjust destIndex before decomposition
- * prevCC>=0
- */
-
- /* end of source reached? */
- if(limit==NULL ? c==0 : src==limit) {
- break;
- }
-
- /* set a pointer to after the last source position where prevCC==0 */
- if(prevCC==0) {
- decompStart=prevSrc;
- }
-
- /* c already contains *src and fcd16 is set for it, increment src */
- ++src;
-
- /* check one above-minimum, relevant code unit */
- if(UTF_IS_FIRST_SURROGATE(c)) {
- /* c is a lead surrogate, get the real fcd16 */
- if(src!=limit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- fcd16=_getFCD16FromSurrogatePair(fcd16, c2);
- } else {
- c2=0;
- fcd16=0;
- }
- } else {
- c2=0;
- }
-
- /* we are looking at the character (c, c2) at [prevSrc..src[ */
- if(nx_contains(nx, c, c2)) {
- fcd16=0; /* excluded: fcd16==0 */
- }
-
- /* check the combining order, get the lead cc */
- cc=(int16_t)(fcd16>>8);
- if(cc==0 || cc>=prevCC) {
- /* the order is ok */
- if(cc==0) {
- decompStart=prevSrc;
- }
- prevCC=(int16_t)(fcd16&0xff);
-
- /* just append (c, c2) */
- length= c2==0 ? 1 : 2;
- if((destIndex+length)<=destCapacity) {
- dest[destIndex++]=c;
- if(c2!=0) {
- dest[destIndex++]=c2;
- }
- } else {
- destIndex+=length;
- }
- } else {
- /*
- * back out the part of the source that we copied already but
- * is now going to be decomposed;
- * prevSrc is set to after what was copied
- */
- destIndex-=(int32_t)(prevSrc-decompStart);
-
- /*
- * find the part of the source that needs to be decomposed;
- * to be safe and simple, decompose to before the next character with lead cc==0
- */
- src=_findSafeFCD(src, limit, fcd16);
-
- /*
- * the source text does not fulfill the conditions for FCD;
- * decompose and reorder a limited piece of the text
- */
- prevCC=_decomposeFCD(decompStart, src,
- dest, destIndex, destCapacity,
- nx);
- decompStart=src;
- }
- }
-
- return u_terminateUChars(dest, destCapacity, destIndex, pErrorCode);
-}
-
-/* make NFC & NFKC ---------------------------------------------------------- */
-
-/* get the composition properties of the next character */
-static inline uint32_t
-_getNextCombining(UChar *&p, const UChar *limit,
- UChar &c, UChar &c2,
- uint16_t &combiningIndex, uint8_t &cc,
- const UnicodeSet *nx) {
- uint32_t norm32, combineFlags;
-
- /* get properties */
- c=*p++;
- norm32=_getNorm32(c);
-
- /* preset output values for most characters */
- c2=0;
- combiningIndex=0;
- cc=0;
-
- if((norm32&(_NORM_CC_MASK|_NORM_COMBINES_ANY))==0) {
- return 0;
- } else {
- if(isNorm32Regular(norm32)) {
- /* set cc etc. below */
- } else if(isNorm32HangulOrJamo(norm32)) {
- /* a compatibility decomposition contained Jamos */
- combiningIndex=(uint16_t)(0xfff0|(norm32>>_NORM_EXTRA_SHIFT));
- return norm32&_NORM_COMBINES_ANY;
- } else {
- /* c is a lead surrogate, get the real norm32 */
- if(p!=limit && UTF_IS_SECOND_SURROGATE(c2=*p)) {
- ++p;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- c2=0;
- return 0;
- }
- }
-
- if(nx_contains(nx, c, c2)) {
- return 0; /* excluded: norm32==0 */
- }
-
- cc=(uint8_t)(norm32>>_NORM_CC_SHIFT);
-
- combineFlags=norm32&_NORM_COMBINES_ANY;
- if(combineFlags!=0) {
- combiningIndex=*(_getExtraData(norm32)-1);
- }
- return combineFlags;
- }
-}
-
-/*
- * given a composition-result starter (c, c2) - which means its cc==0,
- * it combines forward, it has extra data, its norm32!=0,
- * it is not a Hangul or Jamo,
- * get just its combineFwdIndex
- *
- * norm32(c) is special if and only if c2!=0
- */
-static inline uint16_t
-_getCombiningIndexFromStarter(UChar c, UChar c2) {
- uint32_t norm32;
-
- norm32=_getNorm32(c);
- if(c2!=0) {
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- }
- return *(_getExtraData(norm32)-1);
-}
-
-/*
- * Find the recomposition result for
- * a forward-combining character
- * (specified with a pointer to its part of the combiningTable[])
- * and a backward-combining character
- * (specified with its combineBackIndex).
- *
- * If these two characters combine, then set (value, value2)
- * with the code unit(s) of the composition character.
- *
- * Return value:
- * 0 do not combine
- * 1 combine
- * >1 combine, and the composition is a forward-combining starter
- *
- * See unormimp.h for a description of the composition table format.
- */
-static inline uint16_t
-_combine(const uint16_t *table, uint16_t combineBackIndex,
- uint16_t &value, uint16_t &value2) {
- uint16_t key;
-
- /* search in the starter's composition table */
- for(;;) {
- key=*table++;
- if(key>=combineBackIndex) {
- break;
- }
- table+= *table&0x8000 ? 2 : 1;
- }
-
- /* mask off bit 15, the last-entry-in-the-list flag */
- if((key&0x7fff)==combineBackIndex) {
- /* found! combine! */
- value=*table;
-
- /* is the composition a starter that combines forward? */
- key=(uint16_t)((value&0x2000)+1);
-
- /* get the composition result code point from the variable-length result value */
- if(value&0x8000) {
- if(value&0x4000) {
- /* surrogate pair composition result */
- value=(uint16_t)((value&0x3ff)|0xd800);
- value2=*(table+1);
- } else {
- /* BMP composition result U+2000..U+ffff */
- value=*(table+1);
- value2=0;
- }
- } else {
- /* BMP composition result U+0000..U+1fff */
- value&=0x1fff;
- value2=0;
- }
-
- return key;
- } else {
- /* not found */
- return 0;
- }
-}
-
-/*
- * recompose the characters in [p..limit[
- * (which is in NFD - decomposed and canonically ordered),
- * adjust limit, and return the trailing cc
- *
- * since for NFKC we may get Jamos in decompositions, we need to
- * recompose those too
- *
- * note that recomposition never lengthens the text:
- * any character consists of either one or two code units;
- * a composition may contain at most one more code unit than the original starter,
- * while the combining mark that is removed has at least one code unit
- */
-static uint8_t
-_recompose(UChar *p, UChar *&limit, const UnicodeSet *nx) {
- UChar *starter, *pRemove, *q, *r;
- uint32_t combineFlags;
- UChar c, c2;
- uint16_t combineFwdIndex, combineBackIndex;
- uint16_t result, value, value2;
- uint8_t cc, prevCC;
- UBool starterIsSupplementary;
-
- starter=NULL; /* no starter */
- combineFwdIndex=0; /* will not be used until starter!=NULL - avoid compiler warnings */
- combineBackIndex=0; /* will always be set if combineFlags!=0 - avoid compiler warnings */
- value=value2=0; /* always set by _combine() before used - avoid compiler warnings */
- starterIsSupplementary=FALSE; /* will not be used until starter!=NULL - avoid compiler warnings */
- prevCC=0;
-
- for(;;) {
- combineFlags=_getNextCombining(p, limit, c, c2, combineBackIndex, cc, nx);
- if((combineFlags&_NORM_COMBINES_BACK) && starter!=NULL) {
- if(combineBackIndex&0x8000) {
- /* c is a Jamo V/T, see if we can compose it with the previous character */
- pRemove=NULL; /* NULL while no Hangul composition */
- c2=*starter;
- if(combineBackIndex==0xfff2) {
- /* Jamo V, compose with previous Jamo L and following Jamo T */
- c2=(UChar)(c2-JAMO_L_BASE);
- if(c2<JAMO_L_COUNT) {
- pRemove=p-1;
- c=(UChar)(HANGUL_BASE+(c2*JAMO_V_COUNT+(c-JAMO_V_BASE))*JAMO_T_COUNT);
- if(p!=limit && (c2=(UChar)(*p-JAMO_T_BASE))<JAMO_T_COUNT) {
- ++p;
- c+=c2;
- }
- if(!nx_contains(nx, c)) {
- *starter=c;
- } else {
- /* excluded */
- if(!isHangulWithoutJamoT(c)) {
- --p; /* undo the ++p from reading the Jamo T */
- }
- /* c is modified but not used any more -- c=*(p-1); -- re-read the Jamo V/T */
- pRemove=NULL;
- }
- }
-#if 0
- /*
- * The following is disabled with #if 0 because it can not occur:
- * Since the input is in NFD, there are no Hangul LV syllables that
- * a Jamo T could combine with.
- * All Jamo Ts are combined above when handling Jamo Vs.
- */
- } else {
- /* Jamo T, compose with previous Hangul that does not have a Jamo T */
- if(isHangulWithoutJamoT(c2)) {
- pRemove=p-1;
- *starter=(UChar)(c2+(c-JAMO_T_BASE));
- }
-#endif
- }
-
- if(pRemove!=NULL) {
- /* remove the Jamo(s) */
- q=pRemove;
- r=p;
- while(r<limit) {
- *q++=*r++;
- }
- p=pRemove;
- limit=q;
- }
-
- c2=0; /* c2 held *starter temporarily */
-
- /*
- * now: cc==0 and the combining index does not include "forward" ->
- * the rest of the loop body will reset starter to NULL;
- * technically, a composed Hangul syllable is a starter, but it
- * does not combine forward now that we have consumed all eligible Jamos;
- * for Jamo V/T, combineFlags does not contain _NORM_COMBINES_FWD
- */
-
- } else if(
- /* the starter is not a Jamo V/T and */
- !(combineFwdIndex&0x8000) &&
- /* the combining mark is not blocked and */
- (prevCC<cc || prevCC==0) &&
- /* the starter and the combining mark (c, c2) do combine and */
- 0!=(result=_combine(combiningTable+combineFwdIndex, combineBackIndex, value, value2)) &&
- /* the composition result is not excluded */
- !nx_contains(nx, value, value2)
- ) {
- /* replace the starter with the composition, remove the combining mark */
- pRemove= c2==0 ? p-1 : p-2; /* pointer to the combining mark */
-
- /* replace the starter with the composition */
- *starter=(UChar)value;
- if(starterIsSupplementary) {
- if(value2!=0) {
- /* both are supplementary */
- *(starter+1)=(UChar)value2;
- } else {
- /* the composition is shorter than the starter, move the intermediate characters forward one */
- starterIsSupplementary=FALSE;
- q=starter+1;
- r=q+1;
- while(r<pRemove) {
- *q++=*r++;
- }
- --pRemove;
- }
- } else if(value2!=0) {
- /* the composition is longer than the starter, move the intermediate characters back one */
- starterIsSupplementary=TRUE;
- ++starter; /* temporarily increment for the loop boundary */
- q=pRemove;
- r=++pRemove;
- while(starter<q) {
- *--r=*--q;
- }
- *starter=(UChar)value2;
- --starter; /* undo the temporary increment */
- /* } else { both are on the BMP, nothing more to do */
- }
-
- /* remove the combining mark by moving the following text over it */
- if(pRemove<p) {
- q=pRemove;
- r=p;
- while(r<limit) {
- *q++=*r++;
- }
- p=pRemove;
- limit=q;
- }
-
- /* keep prevCC because we removed the combining mark */
-
- /* done? */
- if(p==limit) {
- return prevCC;
- }
-
- /* is the composition a starter that combines forward? */
- if(result>1) {
- combineFwdIndex=_getCombiningIndexFromStarter((UChar)value, (UChar)value2);
- } else {
- starter=NULL;
- }
-
- /* we combined and set prevCC, continue with looking for compositions */
- continue;
- }
- }
-
- /* no combination this time */
- prevCC=cc;
- if(p==limit) {
- return prevCC;
- }
-
- /* if (c, c2) did not combine, then check if it is a starter */
- if(cc==0) {
- /* found a new starter; combineFlags==0 if (c, c2) is excluded */
- if(combineFlags&_NORM_COMBINES_FWD) {
- /* it may combine with something, prepare for it */
- if(c2==0) {
- starterIsSupplementary=FALSE;
- starter=p-1;
- } else {
- starterIsSupplementary=TRUE;
- starter=p-2;
- }
- combineFwdIndex=combineBackIndex;
- } else {
- /* it will not combine with anything */
- starter=NULL;
- }
- }
- }
-}
-
-/* find the last true starter in [start..src[ and return the pointer to it */
-static const UChar *
-_findPreviousStarter(const UChar *start, const UChar *src,
- uint32_t ccOrQCMask, uint32_t decompQCMask, UChar minNoMaybe) {
- uint32_t norm32;
- UChar c, c2;
-
- while(start<src) {
- norm32=_getPrevNorm32(start, src, minNoMaybe, ccOrQCMask|decompQCMask, c, c2);
- if(_isTrueStarter(norm32, ccOrQCMask, decompQCMask)) {
- break;
- }
- }
- return src;
-}
-
-/* find the first true starter in [src..limit[ and return the pointer to it */
-static const UChar *
-_findNextStarter(const UChar *src, const UChar *limit,
- uint32_t qcMask, uint32_t decompQCMask, UChar minNoMaybe) {
- const UChar *p;
- uint32_t norm32, ccOrQCMask;
- int32_t length;
- UChar c, c2;
- uint8_t cc, trailCC;
-
- ccOrQCMask=_NORM_CC_MASK|qcMask;
-
- for(;;) {
- if(src==limit) {
- break; /* end of string */
- }
- c=*src;
- if(c<minNoMaybe) {
- break; /* catches NUL terminater, too */
- }
-
- norm32=_getNorm32(c);
- if((norm32&ccOrQCMask)==0) {
- break; /* true starter */
- }
-
- if(isNorm32LeadSurrogate(norm32)) {
- /* c is a lead surrogate, get the real norm32 */
- if((src+1)==limit || !UTF_IS_SECOND_SURROGATE(c2=*(src+1))) {
- break; /* unmatched first surrogate: counts as a true starter */
- }
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
-
- if((norm32&ccOrQCMask)==0) {
- break; /* true starter */
- }
- } else {
- c2=0;
- }
-
- /* (c, c2) is not a true starter but its decomposition may be */
- if(norm32&decompQCMask) {
- /* (c, c2) decomposes, get everything from the variable-length extra data */
- p=_decompose(norm32, decompQCMask, length, cc, trailCC);
-
- /* get the first character's norm32 to check if it is a true starter */
- if(cc==0 && (_getNorm32(p, qcMask)&qcMask)==0) {
- break; /* true starter */
- }
- }
-
- src+= c2==0 ? 1 : 2; /* not a true starter, continue */
- }
-
- return src;
-}
-
-/* decompose and recompose [prevStarter..src[ */
-static const UChar *
-_composePart(UChar *stackBuffer, UChar *&buffer, int32_t &bufferCapacity, int32_t &length,
- const UChar *prevStarter, const UChar *src,
- uint32_t qcMask, uint8_t &prevCC,
- const UnicodeSet *nx,
- UErrorCode *pErrorCode) {
- UChar *recomposeLimit;
- uint8_t trailCC;
- UBool compat;
-
- compat=(UBool)((qcMask&_NORM_QC_NFKC)!=0);
-
- /* decompose [prevStarter..src[ */
- length=_decompose(buffer, bufferCapacity,
- prevStarter, src-prevStarter,
- compat, nx,
- trailCC);
- if(length>bufferCapacity) {
- if(!u_growBufferFromStatic(stackBuffer, &buffer, &bufferCapacity, 2*length, 0)) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- return NULL;
- }
- length=_decompose(buffer, bufferCapacity,
- prevStarter, src-prevStarter,
- compat, nx,
- trailCC);
- }
-
- /* recompose the decomposition */
- recomposeLimit=buffer+length;
- if(length>=2) {
- prevCC=_recompose(buffer, recomposeLimit, nx);
- }
-
- /* return with a pointer to the recomposition and its length */
- length=recomposeLimit-buffer;
- return buffer;
-}
-
-static inline UBool
-_composeHangul(UChar prev, UChar c, uint32_t norm32, const UChar *&src, const UChar *limit,
- UBool compat, UChar *dest, const UnicodeSet *nx) {
- if(isJamoVTNorm32JamoV(norm32)) {
- /* c is a Jamo V, compose with previous Jamo L and following Jamo T */
- prev=(UChar)(prev-JAMO_L_BASE);
- if(prev<JAMO_L_COUNT) {
- c=(UChar)(HANGUL_BASE+(prev*JAMO_V_COUNT+(c-JAMO_V_BASE))*JAMO_T_COUNT);
-
- /* check if the next character is a Jamo T (normal or compatibility) */
- if(src!=limit) {
- UChar next, t;
-
- next=*src;
- if((t=(UChar)(next-JAMO_T_BASE))<JAMO_T_COUNT) {
- /* normal Jamo T */
- ++src;
- c+=t;
- } else if(compat) {
- /* if NFKC, then check for compatibility Jamo T (BMP only) */
- norm32=_getNorm32(next);
- if(isNorm32Regular(norm32) && (norm32&_NORM_QC_NFKD)) {
- const UChar *p;
- int32_t length;
- uint8_t cc, trailCC;
-
- p=_decompose(norm32, _NORM_QC_NFKD, length, cc, trailCC);
- if(length==1 && (t=(UChar)(*p-JAMO_T_BASE))<JAMO_T_COUNT) {
- /* compatibility Jamo T */
- ++src;
- c+=t;
- }
- }
- }
- }
- if(nx_contains(nx, c)) {
- if(!isHangulWithoutJamoT(c)) {
- --src; /* undo ++src from reading the Jamo T */
- }
- return FALSE;
- }
- if(dest!=0) {
- *dest=c;
- }
- return TRUE;
- }
- } else if(isHangulWithoutJamoT(prev)) {
- /* c is a Jamo T, compose with previous Hangul LV that does not contain a Jamo T */
- c=(UChar)(prev+(c-JAMO_T_BASE));
- if(nx_contains(nx, c)) {
- return FALSE;
- }
- if(dest!=0) {
- *dest=c;
- }
- return TRUE;
- }
- return FALSE;
-}
-
-static int32_t
-_compose(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UBool compat, const UnicodeSet *nx,
- UErrorCode *pErrorCode) {
- UChar stackBuffer[_STACK_BUFFER_CAPACITY];
- UChar *buffer;
- int32_t bufferCapacity;
-
- const UChar *limit, *prevSrc, *prevStarter;
- uint32_t norm32, ccOrQCMask, qcMask;
- int32_t destIndex, reorderStartIndex, length;
- UChar c, c2, minNoMaybe;
- uint8_t cc, prevCC;
-
- if(!compat) {
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFC_NO_MAYBE];
- qcMask=_NORM_QC_NFC;
- } else {
- minNoMaybe=(UChar)indexes[_NORM_INDEX_MIN_NFKC_NO_MAYBE];
- qcMask=_NORM_QC_NFKC;
- }
-
- /* initialize */
- buffer=stackBuffer;
- bufferCapacity=_STACK_BUFFER_CAPACITY;
-
- /*
- * prevStarter points to the last character before the current one
- * that is a "true" starter with cc==0 and quick check "yes".
- *
- * prevStarter will be used instead of looking for a true starter
- * while incrementally decomposing [prevStarter..prevSrc[
- * in _composePart(). Having a good prevStarter allows to just decompose
- * the entire [prevStarter..prevSrc[.
- *
- * When _composePart() backs out from prevSrc back to prevStarter,
- * then it also backs out destIndex by the same amount.
- * Therefore, at all times, the (prevSrc-prevStarter) source units
- * must correspond 1:1 to destination units counted with destIndex,
- * except for reordering.
- * This is true for the qc "yes" characters copied in the fast loop,
- * and for pure reordering.
- * prevStarter must be set forward to src when this is not true:
- * In _composePart() and after composing a Hangul syllable.
- *
- * This mechanism relies on the assumption that the decomposition of a true starter
- * also begins with a true starter. gennorm/store.c checks for this.
- */
- prevStarter=src;
-
- ccOrQCMask=_NORM_CC_MASK|qcMask;
- destIndex=reorderStartIndex=0;
- prevCC=0;
-
- /* avoid compiler warnings */
- norm32=0;
- c=0;
-
- if(srcLength>=0) {
- /* string with length */
- limit=src+srcLength;
- } else /* srcLength==-1 */ {
- /* zero-terminated string */
- limit=NULL;
- }
-
- U_ALIGN_CODE(16);
-
- for(;;) {
- /* count code units below the minimum or with irrelevant data for the quick check */
- prevSrc=src;
- if(limit==NULL) {
- while((c=*src)<minNoMaybe ? c!=0 : ((norm32=_getNorm32(c))&ccOrQCMask)==0) {
- prevCC=0;
- ++src;
- }
- } else {
- while(src!=limit && ((c=*src)<minNoMaybe || ((norm32=_getNorm32(c))&ccOrQCMask)==0)) {
- prevCC=0;
- ++src;
- }
- }
-
- /* copy these code units all at once */
- if(src!=prevSrc) {
- length=(int32_t)(src-prevSrc);
- if((destIndex+length)<=destCapacity) {
- uprv_memcpy(dest+destIndex, prevSrc, length*U_SIZEOF_UCHAR);
- }
- destIndex+=length;
- reorderStartIndex=destIndex;
-
- /* set prevStarter to the last character in the quick check loop */
- prevStarter=src-1;
- if(UTF_IS_SECOND_SURROGATE(*prevStarter) && prevSrc<prevStarter && UTF_IS_FIRST_SURROGATE(*(prevStarter-1))) {
- --prevStarter;
- }
-
- prevSrc=src;
- }
-
- /* end of source reached? */
- if(limit==NULL ? c==0 : src==limit) {
- break;
- }
-
- /* c already contains *src and norm32 is set for it, increment src */
- ++src;
-
- /*
- * source buffer pointers:
- *
- * all done quick check current char not yet
- * "yes" but (c, c2) processed
- * may combine
- * forward
- * [-------------[-------------[-------------[-------------[
- * | | | | |
- * start prevStarter prevSrc src limit
- *
- *
- * destination buffer pointers and indexes:
- *
- * all done might take not filled yet
- * characters for
- * reordering
- * [-------------[-------------[-------------[
- * | | | |
- * dest reorderStartIndex destIndex destCapacity
- */
-
- /* check one above-minimum, relevant code unit */
- /*
- * norm32 is for c=*(src-1), and the quick check flag is "no" or "maybe", and/or cc!=0
- * check for Jamo V/T, then for surrogates and regular characters
- * c is not a Hangul syllable or Jamo L because
- * they are not marked with no/maybe for NFC & NFKC (and their cc==0)
- */
- if(isNorm32HangulOrJamo(norm32)) {
- /*
- * c is a Jamo V/T:
- * try to compose with the previous character, Jamo V also with a following Jamo T,
- * and set values here right now in case we just continue with the main loop
- */
- prevCC=cc=0;
- reorderStartIndex=destIndex;
-
- if(
- destIndex>0 &&
- _composeHangul(
- *(prevSrc-1), c, norm32, src, limit, compat,
- destIndex<=destCapacity ? dest+(destIndex-1) : 0,
- nx)
- ) {
- prevStarter=src;
- continue;
- }
-
- /* the Jamo V/T did not compose into a Hangul syllable, just append to dest */
- c2=0;
- length=1;
- prevStarter=prevSrc;
- } else {
- if(isNorm32Regular(norm32)) {
- c2=0;
- length=1;
- } else {
- /* c is a lead surrogate, get the real norm32 */
- if(src!=limit && UTF_IS_SECOND_SURROGATE(c2=*src)) {
- ++src;
- length=2;
- norm32=_getNorm32FromSurrogatePair(norm32, c2);
- } else {
- /* c is an unpaired lead surrogate, nothing to do */
- c2=0;
- length=1;
- norm32=0;
- }
- }
-
- /* we are looking at the character (c, c2) at [prevSrc..src[ */
- if(nx_contains(nx, c, c2)) {
- /* excluded: norm32==0 */
- cc=0;
- } else if((norm32&qcMask)==0) {
- cc=(uint8_t)(norm32>>_NORM_CC_SHIFT);
- } else {
- const UChar *p;
- uint32_t decompQCMask;
-
- /*
- * find appropriate boundaries around this character,
- * decompose the source text from between the boundaries,
- * and recompose it
- *
- * this puts the intermediate text into the side buffer because
- * it might be longer than the recomposition end result,
- * or the destination buffer may be too short or missing
- *
- * note that destIndex may be adjusted backwards to account
- * for source text that passed the quick check but needed to
- * take part in the recomposition
- */
- decompQCMask=(qcMask<<2)&0xf; /* decomposition quick check mask */
-
- /*
- * find the last true starter in [prevStarter..src[
- * it is either the decomposition of the current character (at prevSrc),
- * or prevStarter
- */
- if(_isTrueStarter(norm32, ccOrQCMask, decompQCMask)) {
- prevStarter=prevSrc;
- } else {
- /* adjust destIndex: back out what had been copied with qc "yes" */
- destIndex-=(int32_t)(prevSrc-prevStarter);
- }
-
- /* find the next true starter in [src..limit[ - modifies src to point to the next starter */
- src=_findNextStarter(src, limit, qcMask, decompQCMask, minNoMaybe);
-
- /* compose [prevStarter..src[ */
- p=_composePart(stackBuffer, buffer, bufferCapacity,
- length, /* output */
- prevStarter, src,
- qcMask,
- prevCC, /* output */
- nx,
- pErrorCode);
-
- if(p==NULL) {
- destIndex=0; /* an error occurred (out of memory) */
- break;
- }
-
- /* append the recomposed buffer contents to the destination buffer */
- if((destIndex+length)<=destCapacity) {
- while(length>0) {
- dest[destIndex++]=*p++;
- --length;
- }
- } else {
- /* buffer overflow */
- /* keep incrementing the destIndex for preflighting */
- destIndex+=length;
- }
-
- /* set the next starter */
- prevStarter=src;
-
- continue;
- }
- }
-
- /* append the single code point (c, c2) to the destination buffer */
- if((destIndex+length)<=destCapacity) {
- if(cc!=0 && cc<prevCC) {
- /* (c, c2) is out of order with respect to the preceding text */
- UChar *reorderSplit=dest+destIndex;
- destIndex+=length;
- prevCC=_insertOrdered(dest+reorderStartIndex, reorderSplit, dest+destIndex, c, c2, cc);
- } else {
- /* just append (c, c2) */
- dest[destIndex++]=c;
- if(c2!=0) {
- dest[destIndex++]=c2;
- }
- prevCC=cc;
- }
- } else {
- /* buffer overflow */
- /* keep incrementing the destIndex for preflighting */
- destIndex+=length;
- prevCC=cc;
- }
- }
-
- /* cleanup */
- if(buffer!=stackBuffer) {
- uprv_free(buffer);
- }
-
- return destIndex;
-}
-
-U_CAPI int32_t U_EXPORT2
-unorm_compose(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UBool compat, int32_t options,
- UErrorCode *pErrorCode) {
- const UnicodeSet *nx;
- int32_t destIndex;
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
-
- nx=getNX(options, *pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- destIndex=_compose(dest, destCapacity,
- src, srcLength,
- compat, nx,
- pErrorCode);
-
- return u_terminateUChars(dest, destCapacity, destIndex, pErrorCode);
-}
-
-/* normalize() API ---------------------------------------------------------- */
-
-/**
- * Internal API for normalizing.
- * Does not check for bad input.
- * Requires _haveData() to be true.
- * @internal
- */
-static int32_t
-unorm_internalNormalize(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UNormalizationMode mode, const UnicodeSet *nx,
- UErrorCode *pErrorCode) {
- int32_t destLength;
- uint8_t trailCC;
-
- switch(mode) {
- case UNORM_NFD:
- destLength=_decompose(dest, destCapacity,
- src, srcLength,
- FALSE, nx, trailCC);
- break;
- case UNORM_NFKD:
- destLength=_decompose(dest, destCapacity,
- src, srcLength,
- TRUE, nx, trailCC);
- break;
- case UNORM_NFC:
- destLength=_compose(dest, destCapacity,
- src, srcLength,
- FALSE, nx, pErrorCode);
- break;
- case UNORM_NFKC:
- destLength=_compose(dest, destCapacity,
- src, srcLength,
- TRUE, nx, pErrorCode);
- break;
- case UNORM_FCD:
- return unorm_makeFCD(dest, destCapacity,
- src, srcLength,
- nx,
- pErrorCode);
- case UNORM_NONE:
- /* just copy the string */
- if(srcLength==-1) {
- srcLength=u_strlen(src);
- }
- if(srcLength>0 && srcLength<=destCapacity) {
- uprv_memcpy(dest, src, srcLength*U_SIZEOF_UCHAR);
- }
- destLength=srcLength;
- break;
- default:
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
-}
-
-/**
- * Internal API for normalizing.
- * Does not check for bad input.
- * @internal
- */
-U_CAPI int32_t U_EXPORT2
-unorm_internalNormalize(UChar *dest, int32_t destCapacity,
- const UChar *src, int32_t srcLength,
- UNormalizationMode mode, int32_t options,
- UErrorCode *pErrorCode) {
- const UnicodeSet *nx;
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
-
- nx=getNX(options, *pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- return unorm_internalNormalize(dest, destCapacity,
- src, srcLength,
- mode, nx,
- pErrorCode);
-}
-
-/** 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) {
- /* check argument values */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- if( destCapacity<0 || (dest==NULL && destCapacity>0) ||
- src==NULL || srcLength<-1
- ) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- /* check for overlapping src and destination */
- if( dest!=NULL &&
- ((src>=dest && src<(dest+destCapacity)) ||
- (srcLength>0 && dest>=src && dest<(src+srcLength)))
- ) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- return unorm_internalNormalize(dest, destCapacity,
- src, srcLength,
- mode, options,
- pErrorCode);
-}
-
-
-/* iteration functions ------------------------------------------------------ */
-
-/*
- * These iteration functions are the core implementations of the
- * Normalizer class iteration API.
- * They read from a UCharIterator into their own buffer
- * and normalize into the Normalizer iteration buffer.
- * Normalizer itself then iterates over its buffer until that needs to be
- * filled again.
- */
-
-/*
- * ### TODO:
- * Now that UCharIterator.next/previous return (int32_t)-1 not (UChar)0xffff
- * if iteration bounds are reached,
- * try to not call hasNext/hasPrevious and instead check for >=0.
- */
-
-/* backward iteration ------------------------------------------------------- */
-
-/*
- * read backwards and get norm32
- * return 0 if the character is <minC
- * if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first surrogate but read second!)
- */
-static inline uint32_t
-_getPrevNorm32(UCharIterator &src, uint32_t minC, uint32_t mask, UChar &c, UChar &c2) {
- uint32_t norm32;
-
- /* need src.hasPrevious() */
- c=(UChar)src.previous(&src);
- c2=0;
-
- /* check for a surrogate before getting norm32 to see if we need to predecrement further */
- if(c<minC) {
- return 0;
- } else if(!UTF_IS_SURROGATE(c)) {
- return _getNorm32(c);
- } else if(UTF_IS_SURROGATE_FIRST(c) || !src.hasPrevious(&src)) {
- /* unpaired surrogate */
- return 0;
- } else if(UTF_IS_FIRST_SURROGATE(c2=(UChar)src.previous(&src))) {
- norm32=_getNorm32(c2);
- if((norm32&mask)==0) {
- /* all surrogate pairs with this lead surrogate have irrelevant data */
- return 0;
- } else {
- /* norm32 must be a surrogate special */
- return _getNorm32FromSurrogatePair(norm32, c);
- }
- } else {
- /* unpaired second surrogate, undo the c2=src.previous() movement */
- src.move(&src, 1, UITER_CURRENT);
- c2=0;
- return 0;
- }
-}
-
-/*
- * read backwards and check if the character is a previous-iteration boundary
- * if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first surrogate but read second!)
- */
-typedef UBool
-IsPrevBoundaryFn(UCharIterator &src, uint32_t minC, uint32_t mask, UChar &c, UChar &c2);
-
-/*
- * for NF*D:
- * read backwards and check if the lead combining class is 0
- * if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first surrogate but read second!)
- */
-static UBool
-_isPrevNFDSafe(UCharIterator &src, uint32_t minC, uint32_t ccOrQCMask, UChar &c, UChar &c2) {
- return _isNFDSafe(_getPrevNorm32(src, minC, ccOrQCMask, c, c2), ccOrQCMask, ccOrQCMask&_NORM_QC_MASK);
-}
-
-/*
- * read backwards and check if the character is (or its decomposition begins with)
- * a "true starter" (cc==0 and NF*C_YES)
- * if c2!=0 then (c2, c) is a surrogate pair (reversed - c2 is first surrogate but read second!)
- */
-static UBool
-_isPrevTrueStarter(UCharIterator &src, uint32_t minC, uint32_t ccOrQCMask, UChar &c, UChar &c2) {
- uint32_t norm32, decompQCMask;
-
- decompQCMask=(ccOrQCMask<<2)&0xf; /* decomposition quick check mask */
- norm32=_getPrevNorm32(src, minC, ccOrQCMask|decompQCMask, c, c2);
- return _isTrueStarter(norm32, ccOrQCMask, decompQCMask);
-}
-
-static int32_t
-_findPreviousIterationBoundary(UCharIterator &src,
- IsPrevBoundaryFn *isPrevBoundary, uint32_t minC, uint32_t mask,
- UChar *&buffer, int32_t &bufferCapacity,
- int32_t &startIndex,
- UErrorCode *pErrorCode) {
- UChar *stackBuffer;
- UChar c, c2;
- UBool isBoundary;
-
- /* initialize */
- stackBuffer=buffer;
- startIndex=bufferCapacity; /* fill the buffer from the end backwards */
-
- while(src.hasPrevious(&src)) {
- isBoundary=isPrevBoundary(src, minC, mask, c, c2);
-
- /* always write this character to the front of the buffer */
- /* make sure there is enough space in the buffer */
- if(startIndex < (c2==0 ? 1 : 2)) {
- int32_t bufferLength=bufferCapacity;
-
- if(!u_growBufferFromStatic(stackBuffer, &buffer, &bufferCapacity, 2*bufferCapacity, bufferLength)) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- src.move(&src, 0, UITER_START);
- return 0;
- }
-
- /* move the current buffer contents up */
- uprv_memmove(buffer+(bufferCapacity-bufferLength), buffer, bufferLength*U_SIZEOF_UCHAR);
- startIndex+=bufferCapacity-bufferLength;
- }
-
- buffer[--startIndex]=c;
- if(c2!=0) {
- buffer[--startIndex]=c2;
- }
-
- /* stop if this just-copied character is a boundary */
- if(isBoundary) {
- break;
- }
- }
-
- /* return the length of the buffer contents */
- return bufferCapacity-startIndex;
-}
-
-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) {
- UChar stackBuffer[100];
- UChar *buffer=NULL;
- IsPrevBoundaryFn *isPreviousBoundary=NULL;
- uint32_t mask=0;
- int32_t startIndex=0, bufferLength=0, bufferCapacity=0, destLength=0;
- int32_t c=0, c2=0;
- UChar minC=0;
-
- /* check argument values */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- if( destCapacity<0 || (dest==NULL && destCapacity>0) ||
- src==NULL
- ) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
-
- if(pNeededToNormalize!=NULL) {
- *pNeededToNormalize=FALSE;
- }
-
- switch(mode) {
- case UNORM_NFD:
- case UNORM_FCD:
- isPreviousBoundary=_isPrevNFDSafe;
- minC=_NORM_MIN_WITH_LEAD_CC;
- mask=_NORM_CC_MASK|_NORM_QC_NFD;
- break;
- case UNORM_NFKD:
- isPreviousBoundary=_isPrevNFDSafe;
- minC=_NORM_MIN_WITH_LEAD_CC;
- mask=_NORM_CC_MASK|_NORM_QC_NFKD;
- break;
- case UNORM_NFC:
- isPreviousBoundary=_isPrevTrueStarter;
- minC=(UChar)indexes[_NORM_INDEX_MIN_NFC_NO_MAYBE];
- mask=_NORM_CC_MASK|_NORM_QC_NFC;
- break;
- case UNORM_NFKC:
- isPreviousBoundary=_isPrevTrueStarter;
- minC=(UChar)indexes[_NORM_INDEX_MIN_NFKC_NO_MAYBE];
- mask=_NORM_CC_MASK|_NORM_QC_NFKC;
- break;
- case UNORM_NONE:
- destLength=0;
- if((c=src->previous(src))>=0) {
- destLength=1;
- if(UTF_IS_TRAIL(c) && (c2=src->previous(src))>=0) {
- if(UTF_IS_LEAD(c2)) {
- if(destCapacity>=2) {
- dest[1]=(UChar)c; /* trail surrogate */
- destLength=2;
- }
- c=c2; /* lead surrogate to be written below */
- } else {
- src->move(src, 1, UITER_CURRENT);
- }
- }
-
- if(destCapacity>0) {
- dest[0]=(UChar)c;
- }
- }
- return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
- default:
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- buffer=stackBuffer;
- bufferCapacity=(int32_t)(sizeof(stackBuffer)/U_SIZEOF_UCHAR);
- bufferLength=_findPreviousIterationBoundary(*src,
- isPreviousBoundary, minC, mask,
- buffer, bufferCapacity,
- startIndex,
- pErrorCode);
- if(bufferLength>0) {
- if(doNormalize) {
- destLength=unorm_internalNormalize(dest, destCapacity,
- buffer+startIndex, bufferLength,
- mode, options,
- pErrorCode);
- if(pNeededToNormalize!=0 && U_SUCCESS(*pErrorCode)) {
- *pNeededToNormalize=
- (UBool)(destLength!=bufferLength ||
- 0!=uprv_memcmp(dest, buffer+startIndex, destLength*U_SIZEOF_UCHAR));
- }
- } else {
- /* just copy the source characters */
- if(destCapacity>0) {
- uprv_memcpy(dest, buffer+startIndex, uprv_min(bufferLength, destCapacity)*U_SIZEOF_UCHAR);
- }
- destLength=u_terminateUChars(dest, destCapacity, bufferLength, pErrorCode);
- }
- } else {
- destLength=u_terminateUChars(dest, destCapacity, 0, pErrorCode);
- }
-
- /* cleanup */
- if(buffer!=stackBuffer) {
- uprv_free(buffer);
- }
-
- return destLength;
-}
-
-/* forward iteration -------------------------------------------------------- */
-
-/*
- * read forward and get norm32
- * return 0 if the character is <minC
- * if c2!=0 then (c2, c) is a surrogate pair
- * always reads complete characters
- */
-static inline uint32_t
-_getNextNorm32(UCharIterator &src, uint32_t minC, uint32_t mask, UChar &c, UChar &c2) {
- uint32_t norm32;
-
- /* need src.hasNext() to be true */
- c=(UChar)src.next(&src);
- c2=0;
-
- if(c<minC) {
- return 0;
- }
-
- norm32=_getNorm32(c);
- if(UTF_IS_FIRST_SURROGATE(c)) {
- if(src.hasNext(&src) && UTF_IS_SECOND_SURROGATE(c2=(UChar)src.current(&src))) {
- src.move(&src, 1, UITER_CURRENT); /* skip the c2 surrogate */
- if((norm32&mask)==0) {
- /* irrelevant data */
- return 0;
- } else {
- /* norm32 must be a surrogate special */
- return _getNorm32FromSurrogatePair(norm32, c2);
- }
- } else {
- /* unmatched surrogate */
- c2=0;
- return 0;
- }
- }
- return norm32;
-}
-
-/*
- * read forward and check if the character is a next-iteration boundary
- * if c2!=0 then (c, c2) is a surrogate pair
- */
-typedef UBool
-IsNextBoundaryFn(UCharIterator &src, uint32_t minC, uint32_t mask, UChar &c, UChar &c2);
-
-/*
- * for NF*D:
- * read forward and check if the lead combining class is 0
- * if c2!=0 then (c, c2) is a surrogate pair
- */
-static UBool
-_isNextNFDSafe(UCharIterator &src, uint32_t minC, uint32_t ccOrQCMask, UChar &c, UChar &c2) {
- return _isNFDSafe(_getNextNorm32(src, minC, ccOrQCMask, c, c2), ccOrQCMask, ccOrQCMask&_NORM_QC_MASK);
-}
-
-/*
- * for NF*C:
- * read forward and check if the character is (or its decomposition begins with)
- * a "true starter" (cc==0 and NF*C_YES)
- * if c2!=0 then (c, c2) is a surrogate pair
- */
-static UBool
-_isNextTrueStarter(UCharIterator &src, uint32_t minC, uint32_t ccOrQCMask, UChar &c, UChar &c2) {
- uint32_t norm32, decompQCMask;
-
- decompQCMask=(ccOrQCMask<<2)&0xf; /* decomposition quick check mask */
- norm32=_getNextNorm32(src, minC, ccOrQCMask|decompQCMask, c, c2);
- return _isTrueStarter(norm32, ccOrQCMask, decompQCMask);
+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);
}
-static int32_t
-_findNextIterationBoundary(UCharIterator &src,
- IsNextBoundaryFn *isNextBoundary, uint32_t minC, uint32_t mask,
- UChar *&buffer, int32_t &bufferCapacity,
- UErrorCode *pErrorCode) {
- UChar *stackBuffer;
- int32_t bufferIndex;
- UChar c, c2;
-
- if(!src.hasNext(&src)) {
- return 0;
+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);
}
+}
- /* initialize */
- stackBuffer=buffer;
-
- /* get one character and ignore its properties */
- buffer[0]=c=(UChar)src.next(&src);
- bufferIndex=1;
- if(UTF_IS_FIRST_SURROGATE(c) && src.hasNext(&src)) {
- if(UTF_IS_SECOND_SURROGATE(c2=(UChar)src.next(&src))) {
- buffer[bufferIndex++]=c2;
- } else {
- src.move(&src, -1, UITER_CURRENT); /* back out the non-trail-surrogate */
- }
- }
+/* normalize() API ---------------------------------------------------------- */
- /* get all following characters until we see a boundary */
- /* checking hasNext() instead of c!=DONE on the off-chance that U+ffff is part of the string */
- while(src.hasNext(&src)) {
- if(isNextBoundary(src, minC, mask, c, c2)) {
- /* back out the latest movement to stop at the boundary */
- src.move(&src, c2==0 ? -1 : -2, UITER_CURRENT);
- break;
- } else {
- if(bufferIndex+(c2==0 ? 1 : 2)<=bufferCapacity ||
- /* attempt to grow the buffer */
- u_growBufferFromStatic(stackBuffer, &buffer, &bufferCapacity,
- 2*bufferCapacity,
- bufferIndex)
- ) {
- buffer[bufferIndex++]=c;
- if(c2!=0) {
- buffer[bufferIndex++]=c2;
- }
- } else {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- src.move(&src, 0, UITER_LIMIT);
- return 0;
- }
- }
+/** 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);
}
-
- /* return the length of the buffer contents */
- return bufferIndex;
}
-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) {
- UChar stackBuffer[100];
- UChar *buffer;
- IsNextBoundaryFn *isNextBoundary;
- uint32_t mask;
- int32_t bufferLength, bufferCapacity, destLength;
- int32_t c, c2;
- UChar minC;
- /* check argument values */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return 0;
- }
+/* iteration functions ------------------------------------------------------ */
- if( destCapacity<0 || (dest==NULL && destCapacity>0) ||
- src==NULL
- ) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+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(!_haveData(*pErrorCode)) {
+ 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);
+ }
- switch(mode) {
- case UNORM_NFD:
- case UNORM_FCD:
- isNextBoundary=_isNextNFDSafe;
- minC=_NORM_MIN_WITH_LEAD_CC;
- mask=_NORM_CC_MASK|_NORM_QC_NFD;
- break;
- case UNORM_NFKD:
- isNextBoundary=_isNextNFDSafe;
- minC=_NORM_MIN_WITH_LEAD_CC;
- mask=_NORM_CC_MASK|_NORM_QC_NFKD;
- break;
- case UNORM_NFC:
- isNextBoundary=_isNextTrueStarter;
- minC=(UChar)indexes[_NORM_INDEX_MIN_NFC_NO_MAYBE];
- mask=_NORM_CC_MASK|_NORM_QC_NFC;
- break;
- case UNORM_NFKC:
- isNextBoundary=_isNextTrueStarter;
- minC=(UChar)indexes[_NORM_INDEX_MIN_NFKC_NO_MAYBE];
- mask=_NORM_CC_MASK|_NORM_QC_NFKC;
- break;
- case UNORM_NONE:
- destLength=0;
- if((c=src->next(src))>=0) {
- destLength=1;
- if(UTF_IS_LEAD(c) && (c2=src->next(src))>=0) {
- if(UTF_IS_TRAIL(c2)) {
- if(destCapacity>=2) {
- dest[1]=(UChar)c2; /* trail surrogate */
- destLength=2;
- }
- /* lead surrogate to be written below */
- } else {
- src->move(src, -1, UITER_CURRENT);
- }
+ 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);
}
-
- if(destCapacity>0) {
- dest[0]=(UChar)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;
}
}
- return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
- default:
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
}
- buffer=stackBuffer;
- bufferCapacity=(int32_t)(sizeof(stackBuffer)/U_SIZEOF_UCHAR);
- bufferLength=_findNextIterationBoundary(*src,
- isNextBoundary, minC, mask,
- buffer, bufferCapacity,
- pErrorCode);
- if(bufferLength>0) {
- if(doNormalize) {
- destLength=unorm_internalNormalize(dest, destCapacity,
- buffer, bufferLength,
- mode, options,
- pErrorCode);
- if(pNeededToNormalize!=0 && U_SUCCESS(*pErrorCode)) {
- *pNeededToNormalize=
- (UBool)(destLength!=bufferLength ||
- 0!=uprv_memcmp(dest, buffer, destLength*U_SIZEOF_UCHAR));
- }
- } else {
- /* just copy the source characters */
- if(destCapacity>0) {
- uprv_memcpy(dest, buffer, uprv_min(bufferLength, destCapacity)*U_SIZEOF_UCHAR);
- }
- destLength=u_terminateUChars(dest, destCapacity, bufferLength, pErrorCode);
+ 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 {
- destLength=u_terminateUChars(dest, destCapacity, 0, pErrorCode);
+ /* just copy the source characters */
+ return buffer.extract(dest, destCapacity, *pErrorCode);
}
+}
- /* cleanup */
- if(buffer!=stackBuffer) {
- uprv_free(buffer);
+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);
+}
- return destLength;
+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);
}
-/*
- * ### TODO: check if NF*D and FCD iteration finds optimal boundaries
- * and if not, how hard it would be to improve it.
- * For example, see _findSafeFCD().
- */
+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 -------------------------------------- */
-U_CAPI int32_t U_EXPORT2
-unorm_concatenate(const UChar *left, int32_t leftLength,
+static int32_t
+_concatenate(const UChar *left, int32_t leftLength,
const UChar *right, int32_t rightLength,
UChar *dest, int32_t destCapacity,
- UNormalizationMode mode, int32_t options,
+ const Normalizer2 *n2,
UErrorCode *pErrorCode) {
- UChar stackBuffer[100];
- UChar *buffer;
- int32_t bufferLength, bufferCapacity;
-
- UCharIterator iter;
- int32_t leftBoundary, rightBoundary, destLength;
-
- /* check argument values */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+ if(U_FAILURE(*pErrorCode)) {
return 0;
}
-
- if( destCapacity<0 || (dest==NULL && destCapacity>0) ||
- left==NULL || leftLength<-1 ||
- right==NULL || rightLength<-1
- ) {
+ if(destCapacity<0 || (dest==NULL && destCapacity>0) ||
+ left==NULL || leftLength<-1 || right==NULL || rightLength<-1) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
}
/* allow left==dest */
-
- /* set up intermediate buffer */
- buffer=stackBuffer;
- bufferCapacity=(int32_t)(sizeof(stackBuffer)/U_SIZEOF_UCHAR);
-
- /*
- * Input: left[0..leftLength[ + right[0..rightLength[
- *
- * Find normalization-safe boundaries leftBoundary and rightBoundary
- * and copy the end parts together:
- * buffer=left[leftBoundary..leftLength[ + right[0..rightBoundary[
- *
- * dest=left[0..leftBoundary[ +
- * normalize(buffer) +
- * right[rightBoundary..rightLength[
- */
-
- /*
- * find a normalization boundary at the end of the left string
- * and copy the end part into the buffer
- */
- uiter_setString(&iter, left, leftLength);
- iter.index=leftLength=iter.length; /* end of left string */
-
- bufferLength=unorm_previous(&iter, buffer, bufferCapacity,
- mode, options,
- FALSE, NULL,
- pErrorCode);
- leftBoundary=iter.index;
- if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) {
- *pErrorCode=U_ZERO_ERROR;
- if(!u_growBufferFromStatic(stackBuffer, &buffer, &bufferCapacity, 2*bufferLength, 0)) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- /* dont need to cleanup here since
- * u_growBufferFromStatic frees buffer if(buffer!=stackBuffer)
- */
- return 0;
- }
-
- /* just copy from the left string: we know the boundary already */
- uprv_memcpy(buffer, left+leftBoundary, bufferLength*U_SIZEOF_UCHAR);
- }
-
- /*
- * find a normalization boundary at the beginning of the right string
- * and concatenate the beginning part to the buffer
- */
- uiter_setString(&iter, right, rightLength);
- rightLength=iter.length; /* in case it was -1 */
-
- rightBoundary=unorm_next(&iter, buffer+bufferLength, bufferCapacity-bufferLength,
- mode, options,
- FALSE, NULL,
- pErrorCode);
- if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) {
- *pErrorCode=U_ZERO_ERROR;
- if(!u_growBufferFromStatic(stackBuffer, &buffer, &bufferCapacity, bufferLength+rightBoundary, 0)) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- /* dont need to cleanup here since
- * u_growBufferFromStatic frees buffer if(buffer!=stackBuffer)
- */
- return 0;
- }
-
- /* just copy from the right string: we know the boundary already */
- uprv_memcpy(buffer+bufferLength, right, rightBoundary*U_SIZEOF_UCHAR);
- }
-
- bufferLength+=rightBoundary;
-
- /* copy left[0..leftBoundary[ to dest */
- if(left!=dest && leftBoundary>0 && destCapacity>0) {
- uprv_memcpy(dest, left, uprv_min(leftBoundary, destCapacity)*U_SIZEOF_UCHAR);
- }
- destLength=leftBoundary;
-
- /* concatenate the normalization of the buffer to dest */
- if(destCapacity>destLength) {
- destLength+=unorm_internalNormalize(dest+destLength, destCapacity-destLength,
- buffer, bufferLength,
- mode, options,
- pErrorCode);
- } else {
- destLength+=unorm_internalNormalize(NULL, 0,
- buffer, bufferLength,
- mode, options,
- pErrorCode);
- }
- /*
- * only errorCode that is expected is a U_BUFFER_OVERFLOW_ERROR
- * so we dont check for the error code here..just let it pass through
- */
- /* concatenate right[rightBoundary..rightLength[ to dest */
- right+=rightBoundary;
- rightLength-=rightBoundary;
- if(rightLength>0 && destCapacity>destLength) {
- uprv_memcpy(dest+destLength, right, uprv_min(rightLength, destCapacity-destLength)*U_SIZEOF_UCHAR);
- }
- destLength+=rightLength;
-
- /* cleanup */
- if(buffer!=stackBuffer) {
- uprv_free(buffer);
- }
-
- return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
-}
-
-/* compare canonically equivalent ------------------------------------------- */
-
-#else
-
-/*
- * Normalization is not built into the ICU library, but case-insensitive
- * comparisons are possible using unorm_cmpEquivFold().
- * The following simply disables the decomposition part.
- */
-
-static inline UBool
-_haveData(UErrorCode &errorCode) {
- if(U_SUCCESS(errorCode)) {
- errorCode=U_INTERNAL_PROGRAM_ERROR;
- }
- return FALSE;
-}
-
-static inline const UChar *
-_decompose(UChar32 /*c*/, UChar /*buffer*/[4], int32_t &/*length*/) {
- return NULL;
-}
-
-#endif /* #if !UCONFIG_NO_NORMALIZATION */
-
-/*
- * Compare two strings for canonical equivalence.
- * Further options include case-insensitive comparison and
- * code point order (as opposed to code unit order).
- *
- * In this function, canonical equivalence is optional as well.
- * If canonical equivalence is tested, then both strings must fulfill
- * the FCD check.
- *
- * Semantically, this is equivalent to
- * strcmp[CodePointOrder](NFD(foldCase(s1)), NFD(foldCase(s2)))
- * where code point order, NFD and foldCase are all optional.
- *
- * String comparisons almost always yield results before processing both strings
- * completely.
- * They are generally more efficient working incrementally instead of
- * performing the sub-processing (strlen, normalization, case-folding)
- * on the entire strings first.
- *
- * It is also unnecessary to not normalize identical characters.
- *
- * This function works in principle as follows:
- *
- * loop {
- * get one code unit c1 from s1 (-1 if end of source)
- * get one code unit c2 from s2 (-1 if end of source)
- *
- * if(either string finished) {
- * return result;
- * }
- * if(c1==c2) {
- * continue;
- * }
- *
- * // c1!=c2
- * try to decompose/case-fold c1/c2, and continue if one does;
- *
- * // still c1!=c2 and neither decomposes/case-folds, return result
- * return c1-c2;
- * }
- *
- * When a character decomposes, then the pointer for that source changes to
- * the decomposition, pushing the previous pointer onto a stack.
- * When the end of the decomposition is reached, then the code unit reader
- * pops the previous source from the stack.
- * (Same for case-folding.)
- *
- * This is complicated further by operating on variable-width UTF-16.
- * The top part of the loop works on code units, while lookups for decomposition
- * and case-folding need code points.
- * Code points are assembled after the equality/end-of-source part.
- * The source pointer is only advanced beyond all code units when the code point
- * actually decomposes/case-folds.
- *
- * If we were on a trail surrogate unit when assembling a code point,
- * and the code point decomposes/case-folds, then the decomposition/folding
- * result must be compared with the part of the other string that corresponds to
- * this string's lead surrogate.
- * Since we only assemble a code point when hitting a trail unit when the
- * preceding lead units were identical, we back up the other string by one unit
- * in such a case.
- *
- * The optional code point order comparison at the end works with
- * the same fix-up as the other code point order comparison functions.
- * See ustring.c and the comment near the end of this function.
- *
- * Assumption: A decomposition or case-folding result string never contains
- * a single surrogate. This is a safe assumption in the Unicode Standard.
- * Therefore, we do not need to check for surrogate pairs across
- * decomposition/case-folding boundaries.
- *
- * Further assumptions (see verifications tstnorm.cpp):
- * The API function checks for FCD first, while the core function
- * first case-folds and then decomposes. This requires that case-folding does not
- * un-FCD any strings.
- *
- * The API function may also NFD the input and turn off decomposition.
- * This requires that case-folding does not un-NFD strings either.
- *
- * TODO If any of the above two assumptions is violated,
- * then this entire code must be re-thought.
- * If this happens, then a simple solution is to case-fold both strings up front
- * and to turn off UNORM_INPUT_IS_FCD.
- * We already do this when not both strings are in FCD because makeFCD
- * would be a partial NFD before the case folding, which does not work.
- * Note that all of this is only a problem when case-folding _and_
- * canonical equivalence come together.
- *
- * This function could be moved to a different source file, at increased cost
- * for calling the decomposition access function.
- */
-
-// stack element for previous-level source/decomposition pointers
-struct CmpEquivLevel {
- const UChar *start, *s, *limit;
-};
-typedef struct CmpEquivLevel CmpEquivLevel;
-
-// internal function
-U_CAPI int32_t U_EXPORT2
-unorm_cmpEquivFold(const UChar *s1, int32_t length1,
- const UChar *s2, int32_t length2,
- uint32_t options,
- UErrorCode *pErrorCode) {
- // current-level start/limit - s1/s2 as current
- const UChar *start1, *start2, *limit1, *limit2;
-
- // decomposition variables
- const UChar *p;
- int32_t length;
-
- // stacks of previous-level start/current/limit
- CmpEquivLevel stack1[2], stack2[2];
-
- // decomposition buffers for Hangul
- UChar decomp1[4], decomp2[4];
-
- // case folding buffers, only use current-level start/limit
- UChar fold1[32], fold2[32];
-
- // track which is the current level per string
- int32_t level1, level2;
-
- // current code units, and code points for lookups
- int32_t c1, c2, cp1, cp2;
-
- // no argument error checking because this itself is not an API
-
- // assume that at least one of the options _COMPARE_EQUIV and U_COMPARE_IGNORE_CASE is set
- // otherwise this function must behave exactly as uprv_strCompare()
- // not checking for that here makes testing this function easier
-
- // normalization/properties data loaded?
- if( ((options&_COMPARE_EQUIV)!=0 && !_haveData(*pErrorCode)) ||
- ((options&U_COMPARE_IGNORE_CASE)!=0 && !uprv_haveProperties(pErrorCode))
- ) {
- return 0;
- }
-
- // initialize
- start1=s1;
- if(length1==-1) {
- limit1=NULL;
- } else {
- limit1=s1+length1;
- }
-
- start2=s2;
- if(length2==-1) {
- limit2=NULL;
+ UnicodeString destString;
+ if(left==dest) {
+ destString.setTo(dest, leftLength, destCapacity);
} else {
- limit2=s2+length2;
- }
-
- level1=level2=0;
- c1=c2=-1;
-
- // comparison loop
- for(;;) {
- // here a code unit value of -1 means "get another code unit"
- // below it will mean "this source is finished"
-
- if(c1<0) {
- // get next code unit from string 1, post-increment
- for(;;) {
- if(s1==limit1 || ((c1=*s1)==0 && (limit1==NULL || (options&_STRNCMP_STYLE)))) {
- if(level1==0) {
- c1=-1;
- break;
- }
- } else {
- ++s1;
- break;
- }
-
- // reached end of level buffer, pop one level
- do {
- --level1;
- start1=stack1[level1].start;
- } while(start1==NULL);
- s1=stack1[level1].s;
- limit1=stack1[level1].limit;
- }
- }
-
- if(c2<0) {
- // get next code unit from string 2, post-increment
- for(;;) {
- if(s2==limit2 || ((c2=*s2)==0 && (limit2==NULL || (options&_STRNCMP_STYLE)))) {
- if(level2==0) {
- c2=-1;
- break;
- }
- } else {
- ++s2;
- break;
- }
-
- // reached end of level buffer, pop one level
- do {
- --level2;
- start2=stack2[level2].start;
- } while(start2==NULL);
- s2=stack2[level2].s;
- limit2=stack2[level2].limit;
- }
- }
-
- // compare c1 and c2
- // either variable c1, c2 is -1 only if the corresponding string is finished
- if(c1==c2) {
- if(c1<0) {
- return 0; // c1==c2==-1 indicating end of strings
- }
- c1=c2=-1; // make us fetch new code units
- continue;
- } else if(c1<0) {
- return -1; // string 1 ends before string 2
- } else if(c2<0) {
- return 1; // string 2 ends before string 1
- }
- // c1!=c2 && c1>=0 && c2>=0
-
- // get complete code points for c1, c2 for lookups if either is a surrogate
- cp1=c1;
- if(UTF_IS_SURROGATE(c1)) {
- UChar c;
-
- if(UTF_IS_SURROGATE_FIRST(c1)) {
- if(s1!=limit1 && UTF_IS_TRAIL(c=*s1)) {
- // advance ++s1; only below if cp1 decomposes/case-folds
- cp1=UTF16_GET_PAIR_VALUE(c1, c);
- }
- } else /* isTrail(c1) */ {
- if(start1<=(s1-2) && UTF_IS_LEAD(c=*(s1-2))) {
- cp1=UTF16_GET_PAIR_VALUE(c, c1);
- }
- }
- }
-
- cp2=c2;
- if(UTF_IS_SURROGATE(c2)) {
- UChar c;
-
- if(UTF_IS_SURROGATE_FIRST(c2)) {
- if(s2!=limit2 && UTF_IS_TRAIL(c=*s2)) {
- // advance ++s2; only below if cp2 decomposes/case-folds
- cp2=UTF16_GET_PAIR_VALUE(c2, c);
- }
- } else /* isTrail(c2) */ {
- if(start2<=(s2-2) && UTF_IS_LEAD(c=*(s2-2))) {
- cp2=UTF16_GET_PAIR_VALUE(c, c2);
- }
- }
- }
-
- // go down one level for each string
- // continue with the main loop as soon as there is a real change
-
- if( level1==0 && (options&U_COMPARE_IGNORE_CASE) &&
- (length=u_internalFoldCase((UChar32)cp1, fold1, 32, options))>=0
- ) {
- // cp1 case-folds to fold1[length]
- if(UTF_IS_SURROGATE(c1)) {
- if(UTF_IS_SURROGATE_FIRST(c1)) {
- // advance beyond source surrogate pair if it case-folds
- ++s1;
- } else /* isTrail(c1) */ {
- // we got a supplementary code point when hitting its trail surrogate,
- // therefore the lead surrogate must have been the same as in the other string;
- // compare this decomposition with the lead surrogate in the other string
- // remember that this simulates bulk text replacement:
- // the decomposition would replace the entire code point
- --s2;
- c2=*(s2-1);
- }
- }
-
- // push current level pointers
- stack1[0].start=start1;
- stack1[0].s=s1;
- stack1[0].limit=limit1;
- ++level1;
-
- // set next level pointers to case folding
- start1=s1=fold1;
- limit1=fold1+length;
-
- // get ready to read from decomposition, continue with loop
- c1=-1;
- continue;
- }
-
- if( level2==0 && (options&U_COMPARE_IGNORE_CASE) &&
- (length=u_internalFoldCase((UChar32)cp2, fold2, 32, options))>=0
- ) {
- // cp2 case-folds to fold2[length]
- if(UTF_IS_SURROGATE(c2)) {
- if(UTF_IS_SURROGATE_FIRST(c2)) {
- // advance beyond source surrogate pair if it case-folds
- ++s2;
- } else /* isTrail(c2) */ {
- // we got a supplementary code point when hitting its trail surrogate,
- // therefore the lead surrogate must have been the same as in the other string;
- // compare this decomposition with the lead surrogate in the other string
- // remember that this simulates bulk text replacement:
- // the decomposition would replace the entire code point
- --s1;
- c1=*(s1-1);
- }
- }
-
- // push current level pointers
- stack2[0].start=start2;
- stack2[0].s=s2;
- stack2[0].limit=limit2;
- ++level2;
-
- // set next level pointers to case folding
- start2=s2=fold2;
- limit2=fold2+length;
-
- // get ready to read from decomposition, continue with loop
- c2=-1;
- continue;
- }
-
- if( level1<2 && (options&_COMPARE_EQUIV) &&
- 0!=(p=_decompose((UChar32)cp1, decomp1, length))
- ) {
- // cp1 decomposes into p[length]
- if(UTF_IS_SURROGATE(c1)) {
- if(UTF_IS_SURROGATE_FIRST(c1)) {
- // advance beyond source surrogate pair if it decomposes
- ++s1;
- } else /* isTrail(c1) */ {
- // we got a supplementary code point when hitting its trail surrogate,
- // therefore the lead surrogate must have been the same as in the other string;
- // compare this decomposition with the lead surrogate in the other string
- // remember that this simulates bulk text replacement:
- // the decomposition would replace the entire code point
- --s2;
- c2=*(s2-1);
- }
- }
-
- // push current level pointers
- stack1[level1].start=start1;
- stack1[level1].s=s1;
- stack1[level1].limit=limit1;
- ++level1;
-
- // set empty intermediate level if skipped
- if(level1<2) {
- stack1[level1++].start=NULL;
- }
-
- // set next level pointers to decomposition
- start1=s1=p;
- limit1=p+length;
-
- // get ready to read from decomposition, continue with loop
- c1=-1;
- continue;
- }
-
- if( level2<2 && (options&_COMPARE_EQUIV) &&
- 0!=(p=_decompose((UChar32)cp2, decomp2, length))
- ) {
- // cp2 decomposes into p[length]
- if(UTF_IS_SURROGATE(c2)) {
- if(UTF_IS_SURROGATE_FIRST(c2)) {
- // advance beyond source surrogate pair if it decomposes
- ++s2;
- } else /* isTrail(c2) */ {
- // we got a supplementary code point when hitting its trail surrogate,
- // therefore the lead surrogate must have been the same as in the other string;
- // compare this decomposition with the lead surrogate in the other string
- // remember that this simulates bulk text replacement:
- // the decomposition would replace the entire code point
- --s1;
- c1=*(s1-1);
- }
- }
-
- // push current level pointers
- stack2[level2].start=start2;
- stack2[level2].s=s2;
- stack2[level2].limit=limit2;
- ++level2;
-
- // set empty intermediate level if skipped
- if(level2<2) {
- stack2[level2++].start=NULL;
- }
-
- // set next level pointers to decomposition
- start2=s2=p;
- limit2=p+length;
-
- // get ready to read from decomposition, continue with loop
- c2=-1;
- continue;
- }
-
- // no decomposition/case folding, max level for both sides:
- // return difference result
-
- // code point order comparison must not just return cp1-cp2
- // because when single surrogates are present then the surrogate pairs
- // that formed cp1 and cp2 may be from different string indexes
-
- // example: { d800 d800 dc01 } vs. { d800 dc00 }, compare at second code units
- // c1=d800 cp1=10001 c2=dc00 cp2=10000
- // cp1-cp2>0 but c1-c2<0 and in fact in UTF-32 it is { d800 10001 } < { 10000 }
-
- // therefore, use same fix-up as in ustring.c/uprv_strCompare()
- // except: uprv_strCompare() fetches c=*s while this functions fetches c=*s++
- // so we have slightly different pointer/start/limit comparisons here
-
- if(c1>=0xd800 && c2>=0xd800 && (options&U_COMPARE_CODE_POINT_ORDER)) {
- /* subtract 0x2800 from BMP code points to make them smaller than supplementary ones */
- if(
- (c1<=0xdbff && s1!=limit1 && UTF_IS_TRAIL(*s1)) ||
- (UTF_IS_TRAIL(c1) && start1!=(s1-1) && UTF_IS_LEAD(*(s1-2)))
- ) {
- /* part of a surrogate pair, leave >=d800 */
- } else {
- /* BMP code point - may be surrogate code point - make <d800 */
- c1-=0x2800;
- }
-
- if(
- (c2<=0xdbff && s2!=limit2 && UTF_IS_TRAIL(*s2)) ||
- (UTF_IS_TRAIL(c2) && start2!=(s2-1) && UTF_IS_LEAD(*(s2-2)))
- ) {
- /* part of a surrogate pair, leave >=d800 */
- } else {
- /* BMP code point - may be surrogate code point - make <d800 */
- c2-=0x2800;
- }
- }
-
- return c1-c2;
+ destString.setTo(dest, 0, destCapacity);
+ destString.append(left, leftLength);
}
+ return n2->append(destString, UnicodeString(rightLength<0, right, rightLength), *pErrorCode).
+ extract(dest, destCapacity, *pErrorCode);
}
-#if !UCONFIG_NO_NORMALIZATION
-
U_CAPI int32_t U_EXPORT2
-unorm_compare(const UChar *s1, int32_t length1,
- const UChar *s2, int32_t length2,
- uint32_t options,
- UErrorCode *pErrorCode) {
- UChar fcd1[300], fcd2[300];
- UChar *d1, *d2;
- const UnicodeSet *nx;
- UNormalizationMode mode;
- int32_t result;
-
- /* argument checking */
- if(pErrorCode==0 || U_FAILURE(*pErrorCode)) {
- return 0;
- }
- if(s1==0 || length1<-1 || s2==0 || length2<-1) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return 0;
- }
-
- if(!_haveData(*pErrorCode)) {
- return 0;
- }
- if(!uprv_haveProperties(pErrorCode)) {
- return 0;
- }
-
- nx=getNX((int32_t)(options>>UNORM_COMPARE_NORM_OPTIONS_SHIFT), *pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- return 0;
- }
-
- d1=d2=0;
- options|=_COMPARE_EQUIV;
- result=0;
-
- /*
- * UAX #21 Case Mappings, as fixed for Unicode version 4
- * (see Jitterbug 2021), defines a canonical caseless match as
- *
- * A string X is a canonical caseless match
- * for a string Y if and only if
- * NFD(toCasefold(NFD(X))) = NFD(toCasefold(NFD(Y)))
- *
- * For better performance, we check for FCD (or let the caller tell us that
- * both strings are in FCD) for the inner normalization.
- * BasicNormalizerTest::FindFoldFCDExceptions() makes sure that
- * case-folding preserves the FCD-ness of a string.
- * The outer normalization is then only performed by unorm_cmpEquivFold()
- * when there is a difference.
- *
- * Exception: When using the Turkic case-folding option, we do perform
- * full NFD first. This is because in the Turkic case precomposed characters
- * with 0049 capital I or 0069 small i fold differently whether they
- * are first decomposed or not, so an FCD check - a check only for
- * canonical order - is not sufficient.
- */
- if(options&U_FOLD_CASE_EXCLUDE_SPECIAL_I) {
- mode=UNORM_NFD;
- options&=~UNORM_INPUT_IS_FCD;
- } else {
- mode=UNORM_FCD;
- }
-
- if(!(options&UNORM_INPUT_IS_FCD)) {
- int32_t _len1, _len2;
- UBool isFCD1, isFCD2;
-
- // check if s1 and/or s2 fulfill the FCD conditions
- isFCD1= UNORM_YES==_quickCheck(s1, length1, mode, TRUE, nx, pErrorCode);
- isFCD2= UNORM_YES==_quickCheck(s2, length2, mode, TRUE, nx, pErrorCode);
+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;
}
-
- /*
- * ICU 2.4 had a further optimization:
- * If both strings were not in FCD, then they were both NFD'ed,
- * and the _COMPARE_EQUIV option was turned off.
- * It is not entirely clear that this is valid with the current
- * definition of the canonical caseless match.
- * Therefore, ICU 2.6 removes that optimization.
- */
-
- if(!isFCD1) {
- _len1=unorm_internalNormalize(fcd1, LENGTHOF(fcd1),
- s1, length1,
- mode, nx,
- pErrorCode);
- if(*pErrorCode!=U_BUFFER_OVERFLOW_ERROR) {
- s1=fcd1;
- } else {
- d1=(UChar *)uprv_malloc(_len1*U_SIZEOF_UCHAR);
- if(d1==0) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- goto cleanup;
- }
-
- *pErrorCode=U_ZERO_ERROR;
- _len1=unorm_internalNormalize(d1, _len1,
- s1, length1,
- mode, nx,
- pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- goto cleanup;
- }
-
- s1=d1;
- }
- length1=_len1;
- }
-
- if(!isFCD2) {
- _len2=unorm_internalNormalize(fcd2, LENGTHOF(fcd2),
- s2, length2,
- mode, nx,
- pErrorCode);
- if(*pErrorCode!=U_BUFFER_OVERFLOW_ERROR) {
- s2=fcd2;
- } else {
- d2=(UChar *)uprv_malloc(_len2*U_SIZEOF_UCHAR);
- if(d2==0) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- goto cleanup;
- }
-
- *pErrorCode=U_ZERO_ERROR;
- _len2=unorm_internalNormalize(d2, _len2,
- s2, length2,
- mode, nx,
- pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- goto cleanup;
- }
-
- s2=d2;
- }
- length2=_len2;
- }
- }
-
- if(U_SUCCESS(*pErrorCode)) {
- result=unorm_cmpEquivFold(s1, length1, s2, length2, options, pErrorCode);
+ FilteredNormalizer2 fn2(*n2, *uni32);
+ return _concatenate(left, leftLength, right, rightLength,
+ dest, destCapacity, &fn2, pErrorCode);
}
-
-cleanup:
- if(d1!=0) {
- uprv_free(d1);
- }
- if(d2!=0) {
- uprv_free(d2);
- }
-
- return result;
+ return _concatenate(left, leftLength, right, rightLength,
+ dest, destCapacity, n2, pErrorCode);
}
#endif /* #if !UCONFIG_NO_NORMALIZATION */
projects / apple / icu.git / blobdiff