// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

*******************************************************************************

*

*   Copyright (C) 2002-2016, International Business Machines

*   Corporation and others.  All Rights Reserved.

*

*******************************************************************************

*   file name:  uprops.cpp

*   encoding:   UTF-8

*   tab size:   8 (not used)

*   indentation:4

*

*   created on: 2002feb24

*   created by: Markus W. Scherer

*

*   Implementations for mostly non-core Unicode character properties

*   stored in uprops.icu.

*

*   With the APIs implemented here, almost all properties files and

*   their associated implementation files are used from this file,

*   including those for normalization and case mappings.

*/

#include "unicode/utypes.h"

#include "unicode/uchar.h"

#include "unicode/unorm2.h"

#include "unicode/uscript.h"

#include "unicode/ustring.h"

#include "cstring.h"

#include "normalizer2impl.h"

#include "umutex.h"

#include "ubidi_props.h"

#include "uprops.h"

#include "ucase.h"

#include "ustr_imp.h"

U_NAMESPACE_USE

/* general properties API functions ----------------------------------------- */

struct BinaryProperty;

typedef UBool BinaryPropertyContains(const BinaryProperty &prop, UChar32 c, UProperty which);

struct BinaryProperty {

    int32_t column;  // SRC_PROPSVEC column, or "source" if mask==0

    uint32_t mask;

    BinaryPropertyContains *contains;

};

static UBool defaultContains(const BinaryProperty &prop, UChar32 c, UProperty /*which*/) {

    /* systematic, directly stored properties */

    return (u_getUnicodeProperties(c, prop.column)&prop.mask)!=0;

}

static UBool caseBinaryPropertyContains(const BinaryProperty &/*prop*/, UChar32 c, UProperty which) {

    return ucase_hasBinaryProperty(c, which);

}

static UBool isBidiControl(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return ubidi_isBidiControl(c);

}

static UBool isMirrored(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return ubidi_isMirrored(c);

}

static UBool isJoinControl(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return ubidi_isJoinControl(c);

}

#if UCONFIG_NO_NORMALIZATION

static UBool hasFullCompositionExclusion(const BinaryProperty &, UChar32, UProperty) {

    return FALSE;

}

#else

static UBool hasFullCompositionExclusion(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    // By definition, Full_Composition_Exclusion is the same as NFC_QC=No.

    UErrorCode errorCode=U_ZERO_ERROR;

    const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(errorCode);

    return U_SUCCESS(errorCode) && impl->isCompNo(impl->getNorm16(c));

}

#endif

// UCHAR_NF*_INERT properties

#if UCONFIG_NO_NORMALIZATION

static UBool isNormInert(const BinaryProperty &, UChar32, UProperty) {

    return FALSE;

}

#else

static UBool isNormInert(const BinaryProperty &/*prop*/, UChar32 c, UProperty which) {

    UErrorCode errorCode=U_ZERO_ERROR;

    const Normalizer2 *norm2=Normalizer2Factory::getInstance(

        (UNormalizationMode)(which-UCHAR_NFD_INERT+UNORM_NFD), errorCode);

    return U_SUCCESS(errorCode) && norm2->isInert(c);

}

#endif

#if UCONFIG_NO_NORMALIZATION

static UBool changesWhenCasefolded(const BinaryProperty &, UChar32, UProperty) {

    return FALSE;

}

#else

static UBool changesWhenCasefolded(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    UnicodeString nfd;

    UErrorCode errorCode=U_ZERO_ERROR;

    const Normalizer2 *nfcNorm2=Normalizer2::getNFCInstance(errorCode);

    if(U_FAILURE(errorCode)) {

        return FALSE;

    }

    if(nfcNorm2->getDecomposition(c, nfd)) {

        /* c has a decomposition */

        if(nfd.length()==1) {

            c=nfd[0];  /* single BMP code point */

        } else if(nfd.length()<=U16_MAX_LENGTH &&

                  nfd.length()==U16_LENGTH(c=nfd.char32At(0))

        ) {

            /* single supplementary code point */

        } else {

            c=U_SENTINEL;

        }

    } else if(c<0) {

        return FALSE;  /* protect against bad input */

    }

    if(c>=0) {

        /* single code point */

        const UChar *resultString;

        return (UBool)(ucase_toFullFolding(c, &resultString, U_FOLD_CASE_DEFAULT)>=0);

    } else {

        /* guess some large but stack-friendly capacity */

        UChar dest[2*UCASE_MAX_STRING_LENGTH];

        int32_t destLength;

        destLength=u_strFoldCase(dest, UPRV_LENGTHOF(dest),

                                  nfd.getBuffer(), nfd.length(),

                                  U_FOLD_CASE_DEFAULT, &errorCode);

        return (UBool)(U_SUCCESS(errorCode) &&

                       0!=u_strCompare(nfd.getBuffer(), nfd.length(),

                                       dest, destLength, FALSE));

    }

}

#endif

#if UCONFIG_NO_NORMALIZATION

static UBool changesWhenNFKC_Casefolded(const BinaryProperty &, UChar32, UProperty) {

    return FALSE;

}

#else

static UBool changesWhenNFKC_Casefolded(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    UErrorCode errorCode=U_ZERO_ERROR;

    const Normalizer2Impl *kcf=Normalizer2Factory::getNFKC_CFImpl(errorCode);

    if(U_FAILURE(errorCode)) {

        return FALSE;

    }

    UnicodeString src(c);

    UnicodeString dest;

    {

        // The ReorderingBuffer must be in a block because its destructor

        // needs to release dest's buffer before we look at its contents.

        ReorderingBuffer buffer(*kcf, dest);

        // Small destCapacity for NFKC_CF(c).

        if(buffer.init(5, errorCode)) {

            const UChar *srcArray=src.getBuffer();

            kcf->compose(srcArray, srcArray+src.length(), FALSE,

                          TRUE, buffer, errorCode);

        }

    }

    return U_SUCCESS(errorCode) && dest!=src;

}

#endif

#if UCONFIG_NO_NORMALIZATION

static UBool isCanonSegmentStarter(const BinaryProperty &, UChar32, UProperty) {

    return FALSE;

}

#else

static UBool isCanonSegmentStarter(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    UErrorCode errorCode=U_ZERO_ERROR;

    const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(errorCode);

    return

        U_SUCCESS(errorCode) && impl->ensureCanonIterData(errorCode) &&

        impl->isCanonSegmentStarter(c);

}

#endif

static UBool isPOSIX_alnum(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_isalnumPOSIX(c);

}

static UBool isPOSIX_blank(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_isblank(c);

}

static UBool isPOSIX_graph(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_isgraphPOSIX(c);

}

static UBool isPOSIX_print(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_isprintPOSIX(c);

}

static UBool isPOSIX_xdigit(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_isxdigit(c);

}

static UBool isRegionalIndicator(const BinaryProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    // Property starts are a subset of lb=RI etc.

    return 0x1F1E6<=c && c<=0x1F1FF;

}

static const BinaryProperty binProps[UCHAR_BINARY_LIMIT]={

    /*

     * column and mask values for binary properties from u_getUnicodeProperties().

     * Must be in order of corresponding UProperty,

     * and there must be exactly one entry per binary UProperty.

     *

     * Properties with mask==0 are handled in code.

     * For them, column is the UPropertySource value.

     */

    { 1,                U_MASK(UPROPS_ALPHABETIC), defaultContains },

    { 1,                U_MASK(UPROPS_ASCII_HEX_DIGIT), defaultContains },

    { UPROPS_SRC_BIDI,  0, isBidiControl },

    { UPROPS_SRC_BIDI,  0, isMirrored },

    { 1,                U_MASK(UPROPS_DASH), defaultContains },

    { 1,                U_MASK(UPROPS_DEFAULT_IGNORABLE_CODE_POINT), defaultContains },

    { 1,                U_MASK(UPROPS_DEPRECATED), defaultContains },

    { 1,                U_MASK(UPROPS_DIACRITIC), defaultContains },

    { 1,                U_MASK(UPROPS_EXTENDER), defaultContains },

    { UPROPS_SRC_NFC,   0, hasFullCompositionExclusion },

    { 1,                U_MASK(UPROPS_GRAPHEME_BASE), defaultContains },

    { 1,                U_MASK(UPROPS_GRAPHEME_EXTEND), defaultContains },

    { 1,                U_MASK(UPROPS_GRAPHEME_LINK), defaultContains },

    { 1,                U_MASK(UPROPS_HEX_DIGIT), defaultContains },

    { 1,                U_MASK(UPROPS_HYPHEN), defaultContains },

    { 1,                U_MASK(UPROPS_ID_CONTINUE), defaultContains },

    { 1,                U_MASK(UPROPS_ID_START), defaultContains },

    { 1,                U_MASK(UPROPS_IDEOGRAPHIC), defaultContains },

    { 1,                U_MASK(UPROPS_IDS_BINARY_OPERATOR), defaultContains },

    { 1,                U_MASK(UPROPS_IDS_TRINARY_OPERATOR), defaultContains },

    { UPROPS_SRC_BIDI,  0, isJoinControl },

    { 1,                U_MASK(UPROPS_LOGICAL_ORDER_EXCEPTION), defaultContains },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_LOWERCASE

    { 1,                U_MASK(UPROPS_MATH), defaultContains },

    { 1,                U_MASK(UPROPS_NONCHARACTER_CODE_POINT), defaultContains },

    { 1,                U_MASK(UPROPS_QUOTATION_MARK), defaultContains },

    { 1,                U_MASK(UPROPS_RADICAL), defaultContains },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_SOFT_DOTTED

    { 1,                U_MASK(UPROPS_TERMINAL_PUNCTUATION), defaultContains },

    { 1,                U_MASK(UPROPS_UNIFIED_IDEOGRAPH), defaultContains },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_UPPERCASE

    { 1,                U_MASK(UPROPS_WHITE_SPACE), defaultContains },

    { 1,                U_MASK(UPROPS_XID_CONTINUE), defaultContains },

    { 1,                U_MASK(UPROPS_XID_START), defaultContains },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASE_SENSITIVE

    { 1,                U_MASK(UPROPS_S_TERM), defaultContains },

    { 1,                U_MASK(UPROPS_VARIATION_SELECTOR), defaultContains },

    { UPROPS_SRC_NFC,   0, isNormInert },  // UCHAR_NFD_INERT

    { UPROPS_SRC_NFKC,  0, isNormInert },  // UCHAR_NFKD_INERT

    { UPROPS_SRC_NFC,   0, isNormInert },  // UCHAR_NFC_INERT

    { UPROPS_SRC_NFKC,  0, isNormInert },  // UCHAR_NFKC_INERT

    { UPROPS_SRC_NFC_CANON_ITER, 0, isCanonSegmentStarter },

    { 1,                U_MASK(UPROPS_PATTERN_SYNTAX), defaultContains },

    { 1,                U_MASK(UPROPS_PATTERN_WHITE_SPACE), defaultContains },

    { UPROPS_SRC_CHAR_AND_PROPSVEC,  0, isPOSIX_alnum },

    { UPROPS_SRC_CHAR,  0, isPOSIX_blank },

    { UPROPS_SRC_CHAR,  0, isPOSIX_graph },

    { UPROPS_SRC_CHAR,  0, isPOSIX_print },

    { UPROPS_SRC_CHAR,  0, isPOSIX_xdigit },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASED

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CASE_IGNORABLE

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_LOWERCASED

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_UPPERCASED

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_TITLECASED

    { UPROPS_SRC_CASE_AND_NORM,  0, changesWhenCasefolded },

    { UPROPS_SRC_CASE,  0, caseBinaryPropertyContains },  // UCHAR_CHANGES_WHEN_CASEMAPPED

    { UPROPS_SRC_NFKC_CF, 0, changesWhenNFKC_Casefolded },

    { 2,                U_MASK(UPROPS_2_EMOJI), defaultContains },

    { 2,                U_MASK(UPROPS_2_EMOJI_PRESENTATION), defaultContains },

    { 2,                U_MASK(UPROPS_2_EMOJI_MODIFIER), defaultContains },

    { 2,                U_MASK(UPROPS_2_EMOJI_MODIFIER_BASE), defaultContains },

    { 2,                U_MASK(UPROPS_2_EMOJI_COMPONENT), defaultContains },

    { 2,                0, isRegionalIndicator },

    { 1,                U_MASK(UPROPS_PREPENDED_CONCATENATION_MARK), defaultContains },

    { 2,                U_MASK(UPROPS_2_EXTENDED_PICTOGRAPHIC), defaultContains },

};

U_CAPI UBool U_EXPORT2

u_hasBinaryProperty(UChar32 c, UProperty which) {

    /* c is range-checked in the functions that are called from here */

    if(which<UCHAR_BINARY_START || UCHAR_BINARY_LIMIT<=which) {

        /* not a known binary property */

        return FALSE;

    } else {

        const BinaryProperty &prop=binProps[which];

        return prop.contains(prop, c, which);

    }

}

struct IntProperty;

typedef int32_t IntPropertyGetValue(const IntProperty &prop, UChar32 c, UProperty which);

typedef int32_t IntPropertyGetMaxValue(const IntProperty &prop, UProperty which);

struct IntProperty {

    int32_t column;  // SRC_PROPSVEC column, or "source" if mask==0

    uint32_t mask;

    int32_t shift;  // =maxValue if getMaxValueFromShift() is used

    IntPropertyGetValue *getValue;

    IntPropertyGetMaxValue *getMaxValue;

};

static int32_t defaultGetValue(const IntProperty &prop, UChar32 c, UProperty /*which*/) {

    /* systematic, directly stored properties */

    return (int32_t)(u_getUnicodeProperties(c, prop.column)&prop.mask)>>prop.shift;

}

static int32_t defaultGetMaxValue(const IntProperty &prop, UProperty /*which*/) {

    return (uprv_getMaxValues(prop.column)&prop.mask)>>prop.shift;

}

static int32_t getMaxValueFromShift(const IntProperty &prop, UProperty /*which*/) {

    return prop.shift;

}

static int32_t getBiDiClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return (int32_t)u_charDirection(c);

}

static int32_t getBiDiPairedBracketType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return (int32_t)ubidi_getPairedBracketType(c);

}

static int32_t biDiGetMaxValue(const IntProperty &/*prop*/, UProperty which) {

    return ubidi_getMaxValue(which);

}

#if UCONFIG_NO_NORMALIZATION

static int32_t getCombiningClass(const IntProperty &, UChar32, UProperty) {

    return 0;

}

#else

static int32_t getCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return u_getCombiningClass(c);

}

#endif

static int32_t getGeneralCategory(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return (int32_t)u_charType(c);

}

static int32_t getJoiningGroup(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return ubidi_getJoiningGroup(c);

}

static int32_t getJoiningType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return ubidi_getJoiningType(c);

}

static int32_t getNumericType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    int32_t ntv=(int32_t)GET_NUMERIC_TYPE_VALUE(u_getMainProperties(c));

    return UPROPS_NTV_GET_TYPE(ntv);

}

static int32_t getScript(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    UErrorCode errorCode=U_ZERO_ERROR;

    return (int32_t)uscript_getScript(c, &errorCode);

}

/*

 * Map some of the Grapheme Cluster Break values to Hangul Syllable Types.

 * Hangul_Syllable_Type is fully redundant with a subset of Grapheme_Cluster_Break.

 */

static const UHangulSyllableType gcbToHst[]={

    U_HST_NOT_APPLICABLE,   /* U_GCB_OTHER */

    U_HST_NOT_APPLICABLE,   /* U_GCB_CONTROL */

    U_HST_NOT_APPLICABLE,   /* U_GCB_CR */

    U_HST_NOT_APPLICABLE,   /* U_GCB_EXTEND */

    U_HST_LEADING_JAMO,     /* U_GCB_L */

    U_HST_NOT_APPLICABLE,   /* U_GCB_LF */

    U_HST_LV_SYLLABLE,      /* U_GCB_LV */

    U_HST_LVT_SYLLABLE,     /* U_GCB_LVT */

    U_HST_TRAILING_JAMO,    /* U_GCB_T */

    U_HST_VOWEL_JAMO        /* U_GCB_V */

    /*

     * Omit GCB values beyond what we need for hst.

     * The code below checks for the array length.

     */

};

static int32_t getHangulSyllableType(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    /* see comments on gcbToHst[] above */

    int32_t gcb=(int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT;

    if(gcb<UPRV_LENGTHOF(gcbToHst)) {

        return gcbToHst[gcb];

    } else {

        return U_HST_NOT_APPLICABLE;

    }

}

#if UCONFIG_NO_NORMALIZATION

static int32_t getNormQuickCheck(const IntProperty &, UChar32, UProperty) {

    return 0;

}

#else

static int32_t getNormQuickCheck(const IntProperty &/*prop*/, UChar32 c, UProperty which) {

    return (int32_t)unorm_getQuickCheck(c, (UNormalizationMode)(which-UCHAR_NFD_QUICK_CHECK+UNORM_NFD));

}

#endif

#if UCONFIG_NO_NORMALIZATION

static int32_t getLeadCombiningClass(const IntProperty &, UChar32, UProperty) {

    return 0;

}

#else

static int32_t getLeadCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return unorm_getFCD16(c)>>8;

}

#endif

#if UCONFIG_NO_NORMALIZATION

static int32_t getTrailCombiningClass(const IntProperty &, UChar32, UProperty) {

    return 0;

}

#else

static int32_t getTrailCombiningClass(const IntProperty &/*prop*/, UChar32 c, UProperty /*which*/) {

    return unorm_getFCD16(c)&0xff;

}

#endif

static const IntProperty intProps[UCHAR_INT_LIMIT-UCHAR_INT_START]={

    /*

     * column, mask and shift values for int-value properties from u_getUnicodeProperties().

     * Must be in order of corresponding UProperty,

     * and there must be exactly one entry per int UProperty.

     *

     * Properties with mask==0 are handled in code.

     * For them, column is the UPropertySource value.

     */

    { UPROPS_SRC_BIDI,  0, 0,                               getBiDiClass, biDiGetMaxValue },

    { 0,                UPROPS_BLOCK_MASK, UPROPS_BLOCK_SHIFT, defaultGetValue, defaultGetMaxValue },

    { UPROPS_SRC_NFC,   0, 0xff,                            getCombiningClass, getMaxValueFromShift },

    { 2,                UPROPS_DT_MASK, 0,                  defaultGetValue, defaultGetMaxValue },

    { 0,                UPROPS_EA_MASK, UPROPS_EA_SHIFT,    defaultGetValue, defaultGetMaxValue },

    { UPROPS_SRC_CHAR,  0, (int32_t)U_CHAR_CATEGORY_COUNT-1,getGeneralCategory, getMaxValueFromShift },

    { UPROPS_SRC_BIDI,  0, 0,                               getJoiningGroup, biDiGetMaxValue },

    { UPROPS_SRC_BIDI,  0, 0,                               getJoiningType, biDiGetMaxValue },

    { 2,                UPROPS_LB_MASK, UPROPS_LB_SHIFT,    defaultGetValue, defaultGetMaxValue },

    { UPROPS_SRC_CHAR,  0, (int32_t)U_NT_COUNT-1,           getNumericType, getMaxValueFromShift },

    { 0,                UPROPS_SCRIPT_MASK, 0,              getScript, defaultGetMaxValue },

    { UPROPS_SRC_PROPSVEC, 0, (int32_t)U_HST_COUNT-1,       getHangulSyllableType, getMaxValueFromShift },

    // UCHAR_NFD_QUICK_CHECK: max=1=YES -- never "maybe", only "no" or "yes"

    { UPROPS_SRC_NFC,   0, (int32_t)UNORM_YES,              getNormQuickCheck, getMaxValueFromShift },

    // UCHAR_NFKD_QUICK_CHECK: max=1=YES -- never "maybe", only "no" or "yes"

    { UPROPS_SRC_NFKC,  0, (int32_t)UNORM_YES,              getNormQuickCheck, getMaxValueFromShift },

    // UCHAR_NFC_QUICK_CHECK: max=2=MAYBE

    { UPROPS_SRC_NFC,   0, (int32_t)UNORM_MAYBE,            getNormQuickCheck, getMaxValueFromShift },

    // UCHAR_NFKC_QUICK_CHECK: max=2=MAYBE

    { UPROPS_SRC_NFKC,  0, (int32_t)UNORM_MAYBE,            getNormQuickCheck, getMaxValueFromShift },

    { UPROPS_SRC_NFC,   0, 0xff,                            getLeadCombiningClass, getMaxValueFromShift },

    { UPROPS_SRC_NFC,   0, 0xff,                            getTrailCombiningClass, getMaxValueFromShift },

    { 2,                UPROPS_GCB_MASK, UPROPS_GCB_SHIFT,  defaultGetValue, defaultGetMaxValue },

    { 2,                UPROPS_SB_MASK, UPROPS_SB_SHIFT,    defaultGetValue, defaultGetMaxValue },

    { 2,                UPROPS_WB_MASK, UPROPS_WB_SHIFT,    defaultGetValue, defaultGetMaxValue },

    { UPROPS_SRC_BIDI,  0, 0,                               getBiDiPairedBracketType, biDiGetMaxValue },

};

U_CAPI int32_t U_EXPORT2

u_getIntPropertyValue(UChar32 c, UProperty which) {

    if(which<UCHAR_INT_START) {

        if(UCHAR_BINARY_START<=which && which<UCHAR_BINARY_LIMIT) {

            const BinaryProperty &prop=binProps[which];

            return prop.contains(prop, c, which);

        }

    } else if(which<UCHAR_INT_LIMIT) {

        const IntProperty &prop=intProps[which-UCHAR_INT_START];

        return prop.getValue(prop, c, which);

    } else if(which==UCHAR_GENERAL_CATEGORY_MASK) {

        return U_MASK(u_charType(c));

    }

    return 0;  // undefined

}

U_CAPI int32_t U_EXPORT2

u_getIntPropertyMinValue(UProperty /*which*/) {

    return 0; /* all binary/enum/int properties have a minimum value of 0 */

}

U_CAPI int32_t U_EXPORT2

u_getIntPropertyMaxValue(UProperty which) {

    if(which<UCHAR_INT_START) {

        if(UCHAR_BINARY_START<=which && which<UCHAR_BINARY_LIMIT) {

            return 1;  // maximum TRUE for all binary properties

        }

    } else if(which<UCHAR_INT_LIMIT) {

        const IntProperty &prop=intProps[which-UCHAR_INT_START];

        return prop.getMaxValue(prop, which);

    }

    return -1;  // undefined

}

U_CFUNC UPropertySource U_EXPORT2

uprops_getSource(UProperty which) {

    if(which<UCHAR_BINARY_START) {

        return UPROPS_SRC_NONE; /* undefined */

    } else if(which<UCHAR_BINARY_LIMIT) {

        const BinaryProperty &prop=binProps[which];

        if(prop.mask!=0) {

            return UPROPS_SRC_PROPSVEC;

        } else {

            return (UPropertySource)prop.column;

        }

    } else if(which<UCHAR_INT_START) {

        return UPROPS_SRC_NONE; /* undefined */

    } else if(which<UCHAR_INT_LIMIT) {

        const IntProperty &prop=intProps[which-UCHAR_INT_START];

        if(prop.mask!=0) {

            return UPROPS_SRC_PROPSVEC;

        } else {

            return (UPropertySource)prop.column;

        }

    } else if(which<UCHAR_STRING_START) {

        switch(which) {

        case UCHAR_GENERAL_CATEGORY_MASK:

        case UCHAR_NUMERIC_VALUE:

            return UPROPS_SRC_CHAR;

        default:

            return UPROPS_SRC_NONE;

        }

    } else if(which<UCHAR_STRING_LIMIT) {

        switch(which) {

        case UCHAR_AGE:

            return UPROPS_SRC_PROPSVEC;

        case UCHAR_BIDI_MIRRORING_GLYPH:

            return UPROPS_SRC_BIDI;

        case UCHAR_CASE_FOLDING:

        case UCHAR_LOWERCASE_MAPPING:

        case UCHAR_SIMPLE_CASE_FOLDING:

        case UCHAR_SIMPLE_LOWERCASE_MAPPING:

        case UCHAR_SIMPLE_TITLECASE_MAPPING:

        case UCHAR_SIMPLE_UPPERCASE_MAPPING:

        case UCHAR_TITLECASE_MAPPING:

        case UCHAR_UPPERCASE_MAPPING:

            return UPROPS_SRC_CASE;

        case UCHAR_ISO_COMMENT:

        case UCHAR_NAME:

        case UCHAR_UNICODE_1_NAME:

            return UPROPS_SRC_NAMES;

        default:

            return UPROPS_SRC_NONE;

        }

    } else {

        switch(which) {

        case UCHAR_SCRIPT_EXTENSIONS:

            return UPROPS_SRC_PROPSVEC;

        default:

            return UPROPS_SRC_NONE; /* undefined */

        }

    }

}

#if !UCONFIG_NO_NORMALIZATION

U_CAPI int32_t U_EXPORT2

u_getFC_NFKC_Closure(UChar32 c, UChar *dest, int32_t destCapacity, UErrorCode *pErrorCode) {

    if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {

        return 0;

    }

    if(destCapacity<0 || (dest==NULL && destCapacity>0)) {

        *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;

        return 0;

    }

    // Compute the FC_NFKC_Closure on the fly:

    // We have the API for complete coverage of Unicode properties, although

    // this value by itself is not useful via API.

    // (What could be useful is a custom normalization table that combines

    // case folding and NFKC.)

    // For the derivation, see Unicode's DerivedNormalizationProps.txt.

    const Normalizer2 *nfkc=Normalizer2::getNFKCInstance(*pErrorCode);

    if(U_FAILURE(*pErrorCode)) {

        return 0;

    }

    // first: b = NFKC(Fold(a))

    UnicodeString folded1String;

    const UChar *folded1;

    int32_t folded1Length=ucase_toFullFolding(c, &folded1, U_FOLD_CASE_DEFAULT);

    if(folded1Length<0) {

        const Normalizer2Impl *nfkcImpl=Normalizer2Factory::getImpl(nfkc);

        if(nfkcImpl->getCompQuickCheck(nfkcImpl->getNorm16(c))!=UNORM_NO) {

            return u_terminateUChars(dest, destCapacity, 0, pErrorCode);  // c does not change at all under CaseFolding+NFKC

        }

        folded1String.setTo(c);

    } else {

        if(folded1Length>UCASE_MAX_STRING_LENGTH) {

            folded1String.setTo(folded1Length);

        } else {

            folded1String.setTo(FALSE, folded1, folded1Length);

        }

    }

    UnicodeString kc1=nfkc->normalize(folded1String, *pErrorCode);

    // second: c = NFKC(Fold(b))

    UnicodeString folded2String(kc1);

    UnicodeString kc2=nfkc->normalize(folded2String.foldCase(), *pErrorCode);

    // if (c != b) add the mapping from a to c

    if(U_FAILURE(*pErrorCode) || kc1==kc2) {

        return u_terminateUChars(dest, destCapacity, 0, pErrorCode);

    } else {

        return kc2.extract(dest, destCapacity, *pErrorCode);

    }

}

#endif