icuSources/common/uprops.cpp

   1 /*
   2 *******************************************************************************
   3 *
   4 *   Copyright (C) 2002-2013, International Business Machines
   5 *   Corporation and others.  All Rights Reserved.
   6 *
   7 *******************************************************************************
   8 *   file name:  uprops.cpp
   9 *   encoding:   US-ASCII
  10 *   tab size:   8 (not used)
  11 *   indentation:4
  12 *
  13 *   created on: 2002feb24
  14 *   created by: Markus W. Scherer
  15 *
  16 *   Implementations for mostly non-core Unicode character properties
  17 *   stored in uprops.icu.
  18 *
  19 *   With the APIs implemented here, almost all properties files and
  20 *   their associated implementation files are used from this file,
  21 *   including those for normalization and case mappings.
  22 */
  23
  24 #include "unicode/utypes.h"
  25 #include "unicode/uchar.h"
  26 #include "unicode/unorm2.h"
  27 #include "unicode/uscript.h"
  28 #include "unicode/ustring.h"
  29 #include "cstring.h"
  30 #include "normalizer2impl.h"
  31 #include "ucln_cmn.h"
  32 #include "umutex.h"
  33 #include "ubidi_props.h"
  34 #include "uprops.h"
  35 #include "ucase.h"
  36 #include "ustr_imp.h"
  37
  38 #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
  39
  40 U_NAMESPACE_USE
  41
  42 #define GET_BIDI_PROPS() ubidi_getSingleton()
  43
  44 /* general properties API functions ----------------------------------------- */
  45
  46 struct BinaryProperty;
  47
  48 typedef UBool BinaryPropertyContains(const BinaryProperty &prop, UChar32 c, UProperty which);
  49
  50 struct BinaryProperty {
  51     int32_t column;  // SRC_PROPSVEC column, or "source" if mask==0
  52     uint32_t mask;
  53     BinaryPropertyContains *contains;
  54 };
  55
  56 static UBool defaultContains(const BinaryProperty &prop, UChar32 c, UProperty /*which*/) {
  57     /* systematic, directly stored properties */
  58     return (u_getUnicodeProperties(c, prop.column)&prop.mask)!=0;
  59 }
  60
  61 static UBool caseBinaryPropertyContains(const BinaryProperty &/*prop*/, UChar32 c, UProperty which) {
  62     return ucase_hasBinaryProperty(c, which);
  63 }
  64
  65 static UBool isBidiControl(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
  66     return ubidi_isBidiControl(GET_BIDI_PROPS(), c);
  67 }
  68
  69 static UBool isMirrored(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
  70     return ubidi_isMirrored(GET_BIDI_PROPS(), c);
  71 }
  72
  73 static UBool isJoinControl(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
  74     return ubidi_isJoinControl(GET_BIDI_PROPS(), c);
  75 }
  76
  77 #if UCONFIG_NO_NORMALIZATION
  78 static UBool hasFullCompositionExclusion(const BinaryProperty &, UChar32, UProperty) {
  79     return FALSE;
  80 }
  81 #else
  82 static UBool hasFullCompositionExclusion(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
  83     // By definition, Full_Composition_Exclusion is the same as NFC_QC=No.
  84     UErrorCode errorCode=U_ZERO_ERROR;
  85     const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(errorCode);
  86     return U_SUCCESS(errorCode) && impl->isCompNo(impl->getNorm16(c));
  87 }
  88 #endif
  89
  90 // UCHAR_NF*_INERT properties
  91 #if UCONFIG_NO_NORMALIZATION
  92 static UBool isNormInert(const BinaryProperty &, UChar32, UProperty) {
  93     return FALSE;
  94 }
  95 #else
  96 static UBool isNormInert(const BinaryProperty &/*prop*/, UChar32 c, UProperty which) {
  97     UErrorCode errorCode=U_ZERO_ERROR;
  98     const Normalizer2 *norm2=Normalizer2Factory::getInstance(
  99         (UNormalizationMode)(which-UCHAR_NFD_INERT+UNORM_NFD), errorCode);
 100     return U_SUCCESS(errorCode) && norm2->isInert(c);
 101 }
 102 #endif
 103
 104 #if UCONFIG_NO_NORMALIZATION
 105 static UBool changesWhenCasefolded(const BinaryProperty &, UChar32, UProperty) {
 106     return FALSE;
 107 }
 108 #else
 109 static UBool changesWhenCasefolded(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 110     UnicodeString nfd;
 111     UErrorCode errorCode=U_ZERO_ERROR;
 112     const Normalizer2 *nfcNorm2=Normalizer2Factory::getNFCInstance(errorCode);
 113     if(U_FAILURE(errorCode)) {
 114         return FALSE;
 115     }
 116     if(nfcNorm2->getDecomposition(c, nfd)) {
 117         /* c has a decomposition */
 118         if(nfd.length()==1) {
 119             c=nfd[0];  /* single BMP code point */
 120         } else if(nfd.length()<=U16_MAX_LENGTH &&
 121                   nfd.length()==U16_LENGTH(c=nfd.char32At(0))
 122         ) {
 123             /* single supplementary code point */
 124         } else {
 125             c=U_SENTINEL;
 126         }
 127     } else if(c<0) {
 128         return FALSE;  /* protect against bad input */
 129     }
 130     if(c>=0) {
 131         /* single code point */
 132         const UCaseProps *csp=ucase_getSingleton();
 133         const UChar *resultString;
 134         return (UBool)(ucase_toFullFolding(csp, c, &resultString, U_FOLD_CASE_DEFAULT)>=0);
 135     } else {
 136         /* guess some large but stack-friendly capacity */
 137         UChar dest[2*UCASE_MAX_STRING_LENGTH];
 138         int32_t destLength;
 139         destLength=u_strFoldCase(dest, LENGTHOF(dest),
 140                                   nfd.getBuffer(), nfd.length(),
 141                                   U_FOLD_CASE_DEFAULT, &errorCode);
 142         return (UBool)(U_SUCCESS(errorCode) &&
 143                        0!=u_strCompare(nfd.getBuffer(), nfd.length(),
 144                                        dest, destLength, FALSE));
 145     }
 146 }
 147 #endif
 148
 149 #if UCONFIG_NO_NORMALIZATION
 150 static UBool changesWhenNFKC_Casefolded(const BinaryProperty &, UChar32, UProperty) {
 151     return FALSE;
 152 }
 153 #else
 154 static UBool changesWhenNFKC_Casefolded(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 155     UErrorCode errorCode=U_ZERO_ERROR;
 156     const Normalizer2Impl *kcf=Normalizer2Factory::getNFKC_CFImpl(errorCode);
 157     if(U_FAILURE(errorCode)) {
 158         return FALSE;
 159     }
 160     UnicodeString src(c);
 161     UnicodeString dest;
 162     {
 163         // The ReorderingBuffer must be in a block because its destructor
 164         // needs to release dest's buffer before we look at its contents.
 165         ReorderingBuffer buffer(*kcf, dest);
 166         // Small destCapacity for NFKC_CF(c).
 167         if(buffer.init(5, errorCode)) {
 168             const UChar *srcArray=src.getBuffer();
 169             kcf->compose(srcArray, srcArray+src.length(), FALSE,
 170                           TRUE, buffer, errorCode);
 171         }
 172     }
 173     return U_SUCCESS(errorCode) && dest!=src;
 174 }
 175 #endif
 176
 177 #if UCONFIG_NO_NORMALIZATION
 178 static UBool isCanonSegmentStarter(const BinaryProperty &, UChar32, UProperty) {
 179     return FALSE;
 180 }
 181 #else
 182 static UBool isCanonSegmentStarter(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 183     UErrorCode errorCode=U_ZERO_ERROR;
 184     const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(errorCode);
 185     return
 186         U_SUCCESS(errorCode) && impl->ensureCanonIterData(errorCode) &&
 187         impl->isCanonSegmentStarter(c);
 188 }
 189 #endif
 190
 191 static UBool isPOSIX_alnum(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 192     return u_isalnumPOSIX(c);
 193 }
 194
 195 static UBool isPOSIX_blank(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 196     return u_isblank(c);
 197 }
 198
 199 static UBool isPOSIX_graph(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 200     return u_isgraphPOSIX(c);
 201 }
 202
 203 static UBool isPOSIX_print(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 204     return u_isprintPOSIX(c);
 205 }
 206
 207 static UBool isPOSIX_xdigit(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 208     return u_isxdigit(c);
 209 }
 210
 211 static const BinaryProperty binProps[UCHAR_BINARY_LIMIT]={
 212     /*
 213      * column and mask values for binary properties from u_getUnicodeProperties().
 214      * Must be in order of corresponding UProperty,
 215      * and there must be exactly one entry per binary UProperty.
 216      *
 217      * Properties with mask==0 are handled in code.
 218      * For them, column is the UPropertySource value.
 219      */
 220     { 1,                U_MASK(UPROPS_ALPHABETIC), defaultContains },
 221     { 1,                U_MASK(UPROPS_ASCII_HEX_DIGIT), defaultContains },
 222     { UPROPS_SRC_BIDI,  0, isBidiControl },
 223     { UPROPS_SRC_BIDI,  0, isMirrored },
 224     { 1,                U_MASK(UPROPS_DASH), defaultContains },
 225     { 1,                U_MASK(UPROPS_DEFAULT_IGNORABLE_CODE_POINT), defaultContains },
 226     { 1,                U_MASK(UPROPS_DEPRECATED), defaultContains },
 227     { 1,                U_MASK(UPROPS_DIACRITIC), defaultContains },
 228     { 1,                U_MASK(UPROPS_EXTENDER), defaultContains },
 229     { UPROPS_SRC_NFC,   0, hasFullCompositionExclusion },
 230     { 1,                U_MASK(UPROPS_GRAPHEME_BASE), defaultContains },
 231     { 1,                U_MASK(UPROPS_GRAPHEME_EXTEND), defaultContains },
 232     { 1,                U_MASK(UPROPS_GRAPHEME_LINK), defaultContains },
 233     { 1,                U_MASK(UPROPS_HEX_DIGIT), defaultContains },
 234     { 1,                U_MASK(UPROPS_HYPHEN), defaultContains },
 235     { 1,                U_MASK(UPROPS_ID_CONTINUE), defaultContains },
 236     { 1,                U_MASK(UPROPS_ID_START), defaultContains },
 237     { 1,                U_MASK(UPROPS_IDEOGRAPHIC), defaultContains },
 238     { 1,                U_MASK(UPROPS_IDS_BINARY_OPERATOR), defaultContains },
 239     { 1,                U_MASK(UPROPS_IDS_TRINARY_OPERATOR), defaultContains },
 240     { UPROPS_SRC_BIDI,  0, isJoinControl },
 241     { 1,                U_MASK(UPROPS_LOGICAL_ORDER_EXCEPTION), defaultContains },
 242     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_LOWERCASE
 243     { 1,                U_MASK(UPROPS_MATH), defaultContains },
 244     { 1,                U_MASK(UPROPS_NONCHARACTER_CODE_POINT), defaultContains },
 245     { 1,                U_MASK(UPROPS_QUOTATION_MARK), defaultContains },
 246     { 1,                U_MASK(UPROPS_RADICAL), defaultContains },
 247     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_SOFT_DOTTED
 248     { 1,                U_MASK(UPROPS_TERMINAL_PUNCTUATION), defaultContains },
 249     { 1,                U_MASK(UPROPS_UNIFIED_IDEOGRAPH), defaultContains },
 250     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_UPPERCASE
 251     { 1,                U_MASK(UPROPS_WHITE_SPACE), defaultContains },
 252     { 1,                U_MASK(UPROPS_XID_CONTINUE), defaultContains },
 253     { 1,                U_MASK(UPROPS_XID_START), defaultContains },
 254     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASE_SENSITIVE
 255     { 1,                U_MASK(UPROPS_S_TERM), defaultContains },
 256     { 1,                U_MASK(UPROPS_VARIATION_SELECTOR), defaultContains },
 257     { UPROPS_SRC_NFC,   0, isNormInert },  // UCHAR_NFD_INERT
 258     { UPROPS_SRC_NFKC,  0, isNormInert },  // UCHAR_NFKD_INERT
 259     { UPROPS_SRC_NFC,   0, isNormInert },  // UCHAR_NFC_INERT
 260     { UPROPS_SRC_NFKC,  0, isNormInert },  // UCHAR_NFKC_INERT
 261     { UPROPS_SRC_NFC_CANON_ITER, 0, isCanonSegmentStarter },
 262     { 1,                U_MASK(UPROPS_PATTERN_SYNTAX), defaultContains },
 263     { 1,                U_MASK(UPROPS_PATTERN_WHITE_SPACE), defaultContains },
 264     { UPROPS_SRC_CHAR_AND_PROPSVEC,  0, isPOSIX_alnum },
 265     { UPROPS_SRC_CHAR,  0, isPOSIX_blank },
 266     { UPROPS_SRC_CHAR,  0, isPOSIX_graph },
 267     { UPROPS_SRC_CHAR,  0, isPOSIX_print },
 268     { UPROPS_SRC_CHAR,  0, isPOSIX_xdigit },
 269     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASED
 270     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASE_IGNORABLE
 271     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_LOWERCASED
 272     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_UPPERCASED
 273     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_TITLECASED
 274     { UPROPS_SRC_CASE_AND_NORM,  0, changesWhenCasefolded },
 275     { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_CASEMAPPED
 276     { UPROPS_SRC_NFKC_CF, 0, changesWhenNFKC_Casefolded }
 277 };
 278
 279 U_CAPI UBool U_EXPORT2
 280 u_hasBinaryProperty(UChar32 c, UProperty which) {
 281     /* c is range-checked in the functions that are called from here */
 282     if(which<UCHAR_BINARY_START || UCHAR_BINARY_LIMIT<=which) {
 283         /* not a known binary property */
 284         return FALSE;
 285     } else {
 286         const BinaryProperty &prop=binProps[which];
 287         return prop.contains(prop, c, which);
 288     }
 289 }
 290
 291 struct IntProperty;
 292
 293 typedef int32_t IntPropertyGetValue(const IntProperty &prop, UChar32 c, UProperty which);
 294 typedef int32_t IntPropertyGetMaxValue(const IntProperty &prop, UProperty which);
 295
 296 struct IntProperty {
 297     int32_t column;  // SRC_PROPSVEC column, or "source" if mask==0
 298     uint32_t mask;
 299     int32_t shift;  // =maxValue if getMaxValueFromShift() is used
 300     IntPropertyGetValue *getValue;
 301     IntPropertyGetMaxValue *getMaxValue;
 302 };
 303
 304 static int32_t defaultGetValue(const IntProperty &prop, UChar32 c, UProperty /*which*/) {
 305     /* systematic, directly stored properties */
 306     return (int32_t)(u_getUnicodeProperties(c, prop.column)&prop.mask)>>prop.shift;
 307 }
 308
 309 static int32_t defaultGetMaxValue(const IntProperty &prop, UProperty /*which*/) {
 310     return (uprv_getMaxValues(prop.column)&prop.mask)>>prop.shift;
 311 }
 312
 313 static int32_t getMaxValueFromShift(const IntProperty &prop, UProperty /*which*/) {
 314     return prop.shift;
 315 }
 316
 317 static int32_t getBiDiClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 318     return (int32_t)u_charDirection(c);
 319 }
 320
 321 static int32_t getBiDiPairedBracketType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 322     return (int32_t)ubidi_getPairedBracketType(GET_BIDI_PROPS(), c);
 323 }
 324
 325 static int32_t biDiGetMaxValue(const IntProperty &/*prop*/, UProperty which) {
 326     return ubidi_getMaxValue(GET_BIDI_PROPS(), which);
 327 }
 328
 329 #if UCONFIG_NO_NORMALIZATION
 330 static int32_t getCombiningClass(const IntProperty &, UChar32, UProperty) {
 331     return 0;
 332 }
 333 #else
 334 static int32_t getCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 335     return u_getCombiningClass(c);
 336 }
 337 #endif
 338
 339 static int32_t getGeneralCategory(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 340     return (int32_t)u_charType(c);
 341 }
 342
 343 static int32_t getJoiningGroup(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 344     return ubidi_getJoiningGroup(GET_BIDI_PROPS(), c);
 345 }
 346
 347 static int32_t getJoiningType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 348     return ubidi_getJoiningType(GET_BIDI_PROPS(), c);
 349 }
 350
 351 static int32_t getNumericType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 352     int32_t ntv=(int32_t)GET_NUMERIC_TYPE_VALUE(u_getMainProperties(c));
 353     return UPROPS_NTV_GET_TYPE(ntv);
 354 }
 355
 356 static int32_t getScript(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 357     UErrorCode errorCode=U_ZERO_ERROR;
 358     return (int32_t)uscript_getScript(c, &errorCode);
 359 }
 360
 361 /*
 362  * Map some of the Grapheme Cluster Break values to Hangul Syllable Types.
 363  * Hangul_Syllable_Type is fully redundant with a subset of Grapheme_Cluster_Break.
 364  */
 365 static const UHangulSyllableType gcbToHst[]={
 366     U_HST_NOT_APPLICABLE,   /* U_GCB_OTHER */
 367     U_HST_NOT_APPLICABLE,   /* U_GCB_CONTROL */
 368     U_HST_NOT_APPLICABLE,   /* U_GCB_CR */
 369     U_HST_NOT_APPLICABLE,   /* U_GCB_EXTEND */
 370     U_HST_LEADING_JAMO,     /* U_GCB_L */
 371     U_HST_NOT_APPLICABLE,   /* U_GCB_LF */
 372     U_HST_LV_SYLLABLE,      /* U_GCB_LV */
 373     U_HST_LVT_SYLLABLE,     /* U_GCB_LVT */
 374     U_HST_TRAILING_JAMO,    /* U_GCB_T */
 375     U_HST_VOWEL_JAMO        /* U_GCB_V */
 376     /*
 377      * Omit GCB values beyond what we need for hst.
 378      * The code below checks for the array length.
 379      */
 380 };
 381
 382 static int32_t getHangulSyllableType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 383     /* see comments on gcbToHst[] above */
 384     int32_t gcb=(int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT;
 385     if(gcb<LENGTHOF(gcbToHst)) {
 386         return gcbToHst[gcb];
 387     } else {
 388         return U_HST_NOT_APPLICABLE;
 389     }
 390 }
 391
 392 #if UCONFIG_NO_NORMALIZATION
 393 static int32_t getNormQuickCheck(const IntProperty &, UChar32, UProperty) {
 394     return 0;
 395 }
 396 #else
 397 static int32_t getNormQuickCheck(const IntProperty &/*prop*/, UChar32 c, UProperty which) {
 398     return (int32_t)unorm_getQuickCheck(c, (UNormalizationMode)(which-UCHAR_NFD_QUICK_CHECK+UNORM_NFD));
 399 }
 400 #endif
 401
 402 #if UCONFIG_NO_NORMALIZATION
 403 static int32_t getLeadCombiningClass(const IntProperty &, UChar32, UProperty) {
 404     return 0;
 405 }
 406 #else
 407 static int32_t getLeadCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 408     return unorm_getFCD16(c)>>8;
 409 }
 410 #endif
 411
 412 #if UCONFIG_NO_NORMALIZATION
 413 static int32_t getTrailCombiningClass(const IntProperty &, UChar32, UProperty) {
 414     return 0;
 415 }
 416 #else
 417 static int32_t getTrailCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {
 418     return unorm_getFCD16(c)&0xff;
 419 }
 420 #endif
 421
 422 static const IntProperty intProps[UCHAR_INT_LIMIT-UCHAR_INT_START]={
 423     /*
 424      * column, mask and shift values for int-value properties from u_getUnicodeProperties().
 425      * Must be in order of corresponding UProperty,
 426      * and there must be exactly one entry per int UProperty.
 427      *
 428      * Properties with mask==0 are handled in code.
 429      * For them, column is the UPropertySource value.
 430      */
 431     { UPROPS_SRC_BIDI,  0, 0,                               getBiDiClass, biDiGetMaxValue },
 432     { 0,                UPROPS_BLOCK_MASK, UPROPS_BLOCK_SHIFT, defaultGetValue, defaultGetMaxValue },
 433     { UPROPS_SRC_NFC,   0, 0xff,                            getCombiningClass, getMaxValueFromShift },
 434     { 2,                UPROPS_DT_MASK, 0,                  defaultGetValue, defaultGetMaxValue },
 435     { 0,                UPROPS_EA_MASK, UPROPS_EA_SHIFT,    defaultGetValue, defaultGetMaxValue },
 436     { UPROPS_SRC_CHAR,  0, (int32_t)U_CHAR_CATEGORY_COUNT-1,getGeneralCategory, getMaxValueFromShift },
 437     { UPROPS_SRC_BIDI,  0, 0,                               getJoiningGroup, biDiGetMaxValue },
 438     { UPROPS_SRC_BIDI,  0, 0,                               getJoiningType, biDiGetMaxValue },
 439     { 2,                UPROPS_LB_MASK, UPROPS_LB_SHIFT,    defaultGetValue, defaultGetMaxValue },
 440     { UPROPS_SRC_CHAR,  0, (int32_t)U_NT_COUNT-1,           getNumericType, getMaxValueFromShift },
 441     { 0,                UPROPS_SCRIPT_MASK, 0,              getScript, defaultGetMaxValue },
 442     { UPROPS_SRC_PROPSVEC, 0, (int32_t)U_HST_COUNT-1,       getHangulSyllableType, getMaxValueFromShift },
 443     // UCHAR_NFD_QUICK_CHECK: max=1=YES -- never "maybe", only "no" or "yes"
 444     { UPROPS_SRC_NFC,   0, (int32_t)UNORM_YES,              getNormQuickCheck, getMaxValueFromShift },
 445     // UCHAR_NFKD_QUICK_CHECK: max=1=YES -- never "maybe", only "no" or "yes"
 446     { UPROPS_SRC_NFKC,  0, (int32_t)UNORM_YES,              getNormQuickCheck, getMaxValueFromShift },
 447     // UCHAR_NFC_QUICK_CHECK: max=2=MAYBE
 448     { UPROPS_SRC_NFC,   0, (int32_t)UNORM_MAYBE,            getNormQuickCheck, getMaxValueFromShift },
 449     // UCHAR_NFKC_QUICK_CHECK: max=2=MAYBE
 450     { UPROPS_SRC_NFKC,  0, (int32_t)UNORM_MAYBE,            getNormQuickCheck, getMaxValueFromShift },
 451     { UPROPS_SRC_NFC,   0, 0xff,                            getLeadCombiningClass, getMaxValueFromShift },
 452     { UPROPS_SRC_NFC,   0, 0xff,                            getTrailCombiningClass, getMaxValueFromShift },
 453     { 2,                UPROPS_GCB_MASK, UPROPS_GCB_SHIFT,  defaultGetValue, defaultGetMaxValue },
 454     { 2,                UPROPS_SB_MASK, UPROPS_SB_SHIFT,    defaultGetValue, defaultGetMaxValue },
 455     { 2,                UPROPS_WB_MASK, UPROPS_WB_SHIFT,    defaultGetValue, defaultGetMaxValue },
 456     { UPROPS_SRC_BIDI,  0, 0,                               getBiDiPairedBracketType, biDiGetMaxValue },
 457 };
 458
 459 U_CAPI int32_t U_EXPORT2
 460 u_getIntPropertyValue(UChar32 c, UProperty which) {
 461     if(which<UCHAR_INT_START) {
 462         if(UCHAR_BINARY_START<=which && which<UCHAR_BINARY_LIMIT) {
 463             const BinaryProperty &prop=binProps[which];
 464             return prop.contains(prop, c, which);
 465         }
 466     } else if(which<UCHAR_INT_LIMIT) {
 467         const IntProperty &prop=intProps[which-UCHAR_INT_START];
 468         return prop.getValue(prop, c, which);
 469     } else if(which==UCHAR_GENERAL_CATEGORY_MASK) {
 470         return U_MASK(u_charType(c));
 471     }
 472     return 0;  // undefined
 473 }
 474
 475 U_CAPI int32_t U_EXPORT2
 476 u_getIntPropertyMinValue(UProperty /*which*/) {
 477     return 0; /* all binary/enum/int properties have a minimum value of 0 */
 478 }
 479
 480 U_CAPI int32_t U_EXPORT2
 481 u_getIntPropertyMaxValue(UProperty which) {
 482     if(which<UCHAR_INT_START) {
 483         if(UCHAR_BINARY_START<=which && which<UCHAR_BINARY_LIMIT) {
 484             return 1;  // maximum TRUE for all binary properties
 485         }
 486     } else if(which<UCHAR_INT_LIMIT) {
 487         const IntProperty &prop=intProps[which-UCHAR_INT_START];
 488         return prop.getMaxValue(prop, which);
 489     }
 490     return -1;  // undefined
 491 }
 492
 493 U_CFUNC UPropertySource U_EXPORT2
 494 uprops_getSource(UProperty which) {
 495     if(which<UCHAR_BINARY_START) {
 496         return UPROPS_SRC_NONE; /* undefined */
 497     } else if(which<UCHAR_BINARY_LIMIT) {
 498         const BinaryProperty &prop=binProps[which];
 499         if(prop.mask!=0) {
 500             return UPROPS_SRC_PROPSVEC;
 501         } else {
 502             return (UPropertySource)prop.column;
 503         }
 504     } else if(which<UCHAR_INT_START) {
 505         return UPROPS_SRC_NONE; /* undefined */
 506     } else if(which<UCHAR_INT_LIMIT) {
 507         const IntProperty &prop=intProps[which-UCHAR_INT_START];
 508         if(prop.mask!=0) {
 509             return UPROPS_SRC_PROPSVEC;
 510         } else {
 511             return (UPropertySource)prop.column;
 512         }
 513     } else if(which<UCHAR_STRING_START) {
 514         switch(which) {
 515         case UCHAR_GENERAL_CATEGORY_MASK:
 516         case UCHAR_NUMERIC_VALUE:
 517             return UPROPS_SRC_CHAR;
 518
 519         default:
 520             return UPROPS_SRC_NONE;
 521         }
 522     } else if(which<UCHAR_STRING_LIMIT) {
 523         switch(which) {
 524         case UCHAR_AGE:
 525             return UPROPS_SRC_PROPSVEC;
 526
 527         case UCHAR_BIDI_MIRRORING_GLYPH:
 528             return UPROPS_SRC_BIDI;
 529
 530         case UCHAR_CASE_FOLDING:
 531         case UCHAR_LOWERCASE_MAPPING:
 532         case UCHAR_SIMPLE_CASE_FOLDING:
 533         case UCHAR_SIMPLE_LOWERCASE_MAPPING:
 534         case UCHAR_SIMPLE_TITLECASE_MAPPING:
 535         case UCHAR_SIMPLE_UPPERCASE_MAPPING:
 536         case UCHAR_TITLECASE_MAPPING:
 537         case UCHAR_UPPERCASE_MAPPING:
 538             return UPROPS_SRC_CASE;
 539
 540         case UCHAR_ISO_COMMENT:
 541         case UCHAR_NAME:
 542         case UCHAR_UNICODE_1_NAME:
 543             return UPROPS_SRC_NAMES;
 544
 545         default:
 546             return UPROPS_SRC_NONE;
 547         }
 548     } else {
 549         switch(which) {
 550         case UCHAR_SCRIPT_EXTENSIONS:
 551             return UPROPS_SRC_PROPSVEC;
 552         default:
 553             return UPROPS_SRC_NONE; /* undefined */
 554         }
 555     }
 556 }
 557
 558 #if !UCONFIG_NO_NORMALIZATION
 559
 560 U_CAPI int32_t U_EXPORT2
 561 u_getFC_NFKC_Closure(UChar32 c, UChar *dest, int32_t destCapacity, UErrorCode *pErrorCode) {
 562     if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
 563         return 0;
 564     }
 565     if(destCapacity<0 || (dest==NULL && destCapacity>0)) {
 566         *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
 567         return 0;
 568     }
 569     // Compute the FC_NFKC_Closure on the fly:
 570     // We have the API for complete coverage of Unicode properties, although
 571     // this value by itself is not useful via API.
 572     // (What could be useful is a custom normalization table that combines
 573     // case folding and NFKC.)
 574     // For the derivation, see Unicode's DerivedNormalizationProps.txt.
 575     const Normalizer2 *nfkc=Normalizer2Factory::getNFKCInstance(*pErrorCode);
 576     const UCaseProps *csp=ucase_getSingleton();
 577     if(U_FAILURE(*pErrorCode)) {
 578         return 0;
 579     }
 580     // first: b = NFKC(Fold(a))
 581     UnicodeString folded1String;
 582     const UChar *folded1;
 583     int32_t folded1Length=ucase_toFullFolding(csp, c, &folded1, U_FOLD_CASE_DEFAULT);
 584     if(folded1Length<0) {
 585         const Normalizer2Impl *nfkcImpl=Normalizer2Factory::getImpl(nfkc);
 586         if(nfkcImpl->getCompQuickCheck(nfkcImpl->getNorm16(c))!=UNORM_NO) {
 587             return u_terminateUChars(dest, destCapacity, 0, pErrorCode);  // c does not change at all under CaseFolding+NFKC
 588         }
 589         folded1String.setTo(c);
 590     } else {
 591         if(folded1Length>UCASE_MAX_STRING_LENGTH) {
 592             folded1String.setTo(folded1Length);
 593         } else {
 594             folded1String.setTo(FALSE, folded1, folded1Length);
 595         }
 596     }
 597     UnicodeString kc1=nfkc->normalize(folded1String, *pErrorCode);
 598     // second: c = NFKC(Fold(b))
 599     UnicodeString folded2String(kc1);
 600     UnicodeString kc2=nfkc->normalize(folded2String.foldCase(), *pErrorCode);
 601     // if (c != b) add the mapping from a to c
 602     if(U_FAILURE(*pErrorCode) || kc1==kc2) {
 603         return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
 604     } else {
 605         return kc2.extract(dest, destCapacity, *pErrorCode);
 606     }
 607 }
 608
 609 #endif