| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2002-2005, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: uprops.h |
| * encoding: US-ASCII |
| * 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/uscript.h" |
| #include "cstring.h" |
| #include "ucln_cmn.h" |
| #include "umutex.h" |
| #include "unormimp.h" |
| #include "ubidi_props.h" |
| #include "uprops.h" |
| #include "ucase.h" |
| |
| #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) |
| |
| /* cleanup ------------------------------------------------------------------ */ |
| |
| static const UCaseProps *gCsp=NULL; |
| static const UBiDiProps *gBdp=NULL; |
| |
| static UBool U_CALLCONV uprops_cleanup(void) { |
| gCsp=NULL; |
| gBdp=NULL; |
| return TRUE; |
| } |
| |
| /* case mapping properties API ---------------------------------------------- */ |
| |
| /* get the UCaseProps singleton, or else its dummy, once and for all */ |
| static const UCaseProps * |
| getCaseProps() { |
| /* |
| * This lazy intialization with double-checked locking (without mutex protection for |
| * the initial check) is transiently unsafe under certain circumstances. |
| * Check the readme and use u_init() if necessary. |
| */ |
| |
| /* the initial check is performed by the GET_CASE_PROPS() macro */ |
| const UCaseProps *csp; |
| UErrorCode errorCode=U_ZERO_ERROR; |
| |
| csp=ucase_getSingleton(&errorCode); |
| if(U_FAILURE(errorCode)) { |
| errorCode=U_ZERO_ERROR; |
| csp=ucase_getDummy(&errorCode); |
| if(U_FAILURE(errorCode)) { |
| return NULL; |
| } |
| } |
| |
| umtx_lock(NULL); |
| if(gCsp==NULL) { |
| gCsp=csp; |
| csp=NULL; |
| ucln_common_registerCleanup(UCLN_COMMON_UPROPS, uprops_cleanup); |
| } |
| umtx_unlock(NULL); |
| |
| return gCsp; |
| } |
| |
| /* |
| * In ICU 3.0, most Unicode properties were loaded from uprops.icu. |
| * ICU 3.2 adds ucase.icu for case mapping properties. |
| * ICU 3.4 adds ubidi.icu for bidi/shaping properties and |
| * removes case/bidi/shaping properties from uprops.icu. |
| * |
| * Loading of uprops.icu was never mutex-protected and required u_init() |
| * for thread safety. |
| * In order to maintain performance for all such properties, |
| * ucase.icu and ubidi.icu are loaded lazily, without mutexing. |
| * u_init() will try to load them for thread safety, |
| * but u_init() will not fail if they are missing. |
| * |
| * uchar.c maintains a tri-state flag for (not loaded/loaded/failed to load) |
| * and an error code for load failure. |
| * Instead, here we try to load at most once. |
| * If it works, we use the resulting singleton object. |
| * If it fails, then we get a dummy object, which always works unless |
| * we are seriously out of memory. |
| * After the first try, we have a never-changing pointer to either the |
| * real singleton or the dummy. |
| * |
| * This method is used in Unicode properties APIs (uchar.h) that |
| * do not have a service object and also do not have an error code parameter. |
| * Other API implementations get the singleton themselves |
| * (with mutexing), store it in the service object, and report errors. |
| */ |
| #define GET_CASE_PROPS() (gCsp!=NULL ? gCsp : getCaseProps()) |
| |
| /* public API (see uchar.h) */ |
| |
| U_CAPI UBool U_EXPORT2 |
| u_isULowercase(UChar32 c) { |
| return (UBool)(UCASE_LOWER==ucase_getType(GET_CASE_PROPS(), c)); |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| u_isUUppercase(UChar32 c) { |
| return (UBool)(UCASE_UPPER==ucase_getType(GET_CASE_PROPS(), c)); |
| } |
| |
| /* Transforms the Unicode character to its lower case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_tolower(UChar32 c) { |
| return ucase_tolower(GET_CASE_PROPS(), c); |
| } |
| |
| /* Transforms the Unicode character to its upper case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_toupper(UChar32 c) { |
| return ucase_toupper(GET_CASE_PROPS(), c); |
| } |
| |
| /* Transforms the Unicode character to its title case equivalent.*/ |
| U_CAPI UChar32 U_EXPORT2 |
| u_totitle(UChar32 c) { |
| return ucase_totitle(GET_CASE_PROPS(), c); |
| } |
| |
| /* return the simple case folding mapping for c */ |
| U_CAPI UChar32 U_EXPORT2 |
| u_foldCase(UChar32 c, uint32_t options) { |
| return ucase_fold(GET_CASE_PROPS(), c, options); |
| } |
| |
| /* bidi/shaping properties API ---------------------------------------------- */ |
| |
| /* get the UBiDiProps singleton, or else its dummy, once and for all */ |
| static const UBiDiProps * |
| getBiDiProps() { |
| /* |
| * This lazy intialization with double-checked locking (without mutex protection for |
| * the initial check) is transiently unsafe under certain circumstances. |
| * Check the readme and use u_init() if necessary. |
| */ |
| |
| /* the initial check is performed by the GET_BIDI_PROPS() macro */ |
| const UBiDiProps *bdp; |
| UErrorCode errorCode=U_ZERO_ERROR; |
| |
| bdp=ubidi_getSingleton(&errorCode); |
| if(U_FAILURE(errorCode)) { |
| errorCode=U_ZERO_ERROR; |
| bdp=ubidi_getDummy(&errorCode); |
| if(U_FAILURE(errorCode)) { |
| return NULL; |
| } |
| } |
| |
| umtx_lock(NULL); |
| if(gBdp==NULL) { |
| gBdp=bdp; |
| bdp=NULL; |
| ucln_common_registerCleanup(UCLN_COMMON_UPROPS, uprops_cleanup); |
| } |
| umtx_unlock(NULL); |
| |
| return gBdp; |
| } |
| |
| /* see comment for GET_CASE_PROPS() */ |
| #define GET_BIDI_PROPS() (gBdp!=NULL ? gBdp : getBiDiProps()) |
| |
| /* general properties API functions ----------------------------------------- */ |
| |
| static const struct { |
| int32_t column; |
| uint32_t mask; |
| } 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 exacly 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) }, |
| { 1, U_MASK(UPROPS_ASCII_HEX_DIGIT) }, |
| { UPROPS_SRC_BIDI, 0 }, /* UCHAR_BIDI_CONTROL */ |
| { UPROPS_SRC_BIDI, 0 }, /* UCHAR_BIDI_MIRRORED */ |
| { 1, U_MASK(UPROPS_DASH) }, |
| { 1, U_MASK(UPROPS_DEFAULT_IGNORABLE_CODE_POINT) }, |
| { 1, U_MASK(UPROPS_DEPRECATED) }, |
| { 1, U_MASK(UPROPS_DIACRITIC) }, |
| { 1, U_MASK(UPROPS_EXTENDER) }, |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_FULL_COMPOSITION_EXCLUSION */ |
| { 1, U_MASK(UPROPS_GRAPHEME_BASE) }, |
| { 1, U_MASK(UPROPS_GRAPHEME_EXTEND) }, |
| { 1, U_MASK(UPROPS_GRAPHEME_LINK) }, |
| { 1, U_MASK(UPROPS_HEX_DIGIT) }, |
| { 1, U_MASK(UPROPS_HYPHEN) }, |
| { 1, U_MASK(UPROPS_ID_CONTINUE) }, |
| { 1, U_MASK(UPROPS_ID_START) }, |
| { 1, U_MASK(UPROPS_IDEOGRAPHIC) }, |
| { 1, U_MASK(UPROPS_IDS_BINARY_OPERATOR) }, |
| { 1, U_MASK(UPROPS_IDS_TRINARY_OPERATOR) }, |
| { UPROPS_SRC_BIDI, 0 }, /* UCHAR_JOIN_CONTROL */ |
| { 1, U_MASK(UPROPS_LOGICAL_ORDER_EXCEPTION) }, |
| { UPROPS_SRC_CASE, 0 }, /* UCHAR_LOWERCASE */ |
| { 1, U_MASK(UPROPS_MATH) }, |
| { 1, U_MASK(UPROPS_NONCHARACTER_CODE_POINT) }, |
| { 1, U_MASK(UPROPS_QUOTATION_MARK) }, |
| { 1, U_MASK(UPROPS_RADICAL) }, |
| { UPROPS_SRC_CASE, 0 }, /* UCHAR_SOFT_DOTTED */ |
| { 1, U_MASK(UPROPS_TERMINAL_PUNCTUATION) }, |
| { 1, U_MASK(UPROPS_UNIFIED_IDEOGRAPH) }, |
| { UPROPS_SRC_CASE, 0 }, /* UCHAR_UPPERCASE */ |
| { 1, U_MASK(UPROPS_WHITE_SPACE) }, |
| { 1, U_MASK(UPROPS_XID_CONTINUE) }, |
| { 1, U_MASK(UPROPS_XID_START) }, |
| { UPROPS_SRC_CASE, 0 }, /* UCHAR_CASE_SENSITIVE */ |
| { 2, U_MASK(UPROPS_V2_S_TERM) }, |
| { 2, U_MASK(UPROPS_V2_VARIATION_SELECTOR) }, |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_NFD_INERT */ |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_NFKD_INERT */ |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_NFC_INERT */ |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_NFKC_INERT */ |
| { UPROPS_SRC_NORM, 0 }, /* UCHAR_SEGMENT_STARTER */ |
| { 2, U_MASK(UPROPS_V2_PATTERN_SYNTAX) }, |
| { 2, U_MASK(UPROPS_V2_PATTERN_WHITE_SPACE) }, |
| { UPROPS_SRC_CHAR_AND_PROPSVEC, 0 }, /* UCHAR_POSIX_ALNUM */ |
| { UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_BLANK */ |
| { UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_GRAPH */ |
| { UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_PRINT */ |
| { UPROPS_SRC_CHAR, 0 } /* UCHAR_POSIX_XDIGIT */ |
| }; |
| |
| 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 */ |
| } else { |
| uint32_t mask=binProps[which].mask; |
| int32_t column=binProps[which].column; |
| if(mask!=0) { |
| /* systematic, directly stored properties */ |
| return (u_getUnicodeProperties(c, column)&mask)!=0; |
| } else { |
| if(column==UPROPS_SRC_CASE) { |
| /* case mapping properties */ |
| const UCaseProps *csp=GET_CASE_PROPS(); |
| if(csp==NULL) { |
| return FALSE; |
| } |
| switch(which) { |
| case UCHAR_LOWERCASE: |
| return (UBool)(UCASE_LOWER==ucase_getType(csp, c)); |
| case UCHAR_UPPERCASE: |
| return (UBool)(UCASE_UPPER==ucase_getType(csp, c)); |
| case UCHAR_SOFT_DOTTED: |
| return ucase_isSoftDotted(csp, c); |
| case UCHAR_CASE_SENSITIVE: |
| return ucase_isCaseSensitive(csp, c); |
| default: |
| break; |
| } |
| } else if(column==UPROPS_SRC_NORM) { |
| #if !UCONFIG_NO_NORMALIZATION |
| /* normalization properties from unorm.icu */ |
| switch(which) { |
| case UCHAR_FULL_COMPOSITION_EXCLUSION: |
| return unorm_internalIsFullCompositionExclusion(c); |
| case UCHAR_NFD_INERT: |
| case UCHAR_NFKD_INERT: |
| case UCHAR_NFC_INERT: |
| case UCHAR_NFKC_INERT: |
| return unorm_isNFSkippable(c, (UNormalizationMode)(which-UCHAR_NFD_INERT)+UNORM_NFD); |
| case UCHAR_SEGMENT_STARTER: |
| return unorm_isCanonSafeStart(c); |
| default: |
| break; |
| } |
| #endif |
| } else if(column==UPROPS_SRC_BIDI) { |
| /* bidi/shaping properties */ |
| const UBiDiProps *bdp=GET_BIDI_PROPS(); |
| if(bdp==NULL) { |
| return FALSE; |
| } |
| switch(which) { |
| case UCHAR_BIDI_MIRRORED: |
| return ubidi_isMirrored(bdp, c); |
| case UCHAR_BIDI_CONTROL: |
| return ubidi_isBidiControl(bdp, c); |
| case UCHAR_JOIN_CONTROL: |
| return ubidi_isJoinControl(bdp, c); |
| default: |
| break; |
| } |
| } else if(column==UPROPS_SRC_CHAR) { |
| switch(which) { |
| case UCHAR_POSIX_BLANK: |
| return u_isblank(c); |
| case UCHAR_POSIX_GRAPH: |
| return u_isgraphPOSIX(c); |
| case UCHAR_POSIX_PRINT: |
| return u_isprintPOSIX(c); |
| case UCHAR_POSIX_XDIGIT: |
| return u_isxdigit(c); |
| default: |
| break; |
| } |
| } else if(column==UPROPS_SRC_CHAR_AND_PROPSVEC) { |
| switch(which) { |
| case UCHAR_POSIX_ALNUM: |
| return u_isalnumPOSIX(c); |
| default: |
| break; |
| } |
| } |
| } |
| } |
| return FALSE; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| u_getIntPropertyValue(UChar32 c, UProperty which) { |
| UErrorCode errorCode; |
| int32_t type; |
| |
| if(which<UCHAR_BINARY_START) { |
| return 0; /* undefined */ |
| } else if(which<UCHAR_BINARY_LIMIT) { |
| return (int32_t)u_hasBinaryProperty(c, which); |
| } else if(which<UCHAR_INT_START) { |
| return 0; /* undefined */ |
| } else if(which<UCHAR_INT_LIMIT) { |
| switch(which) { |
| case UCHAR_BIDI_CLASS: |
| return (int32_t)u_charDirection(c); |
| case UCHAR_BLOCK: |
| return (int32_t)ublock_getCode(c); |
| case UCHAR_CANONICAL_COMBINING_CLASS: |
| #if !UCONFIG_NO_NORMALIZATION |
| return u_getCombiningClass(c); |
| #else |
| return 0; |
| #endif |
| case UCHAR_DECOMPOSITION_TYPE: |
| return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_DT_MASK); |
| case UCHAR_EAST_ASIAN_WIDTH: |
| return (int32_t)(u_getUnicodeProperties(c, 0)&UPROPS_EA_MASK)>>UPROPS_EA_SHIFT; |
| case UCHAR_GENERAL_CATEGORY: |
| return (int32_t)u_charType(c); |
| case UCHAR_JOINING_GROUP: |
| return ubidi_getJoiningGroup(GET_BIDI_PROPS(), c); |
| case UCHAR_JOINING_TYPE: |
| return ubidi_getJoiningType(GET_BIDI_PROPS(), c); |
| case UCHAR_LINE_BREAK: |
| return (int32_t)(u_getUnicodeProperties(c, 0)&UPROPS_LB_MASK)>>UPROPS_LB_SHIFT; |
| case UCHAR_NUMERIC_TYPE: |
| type=(int32_t)GET_NUMERIC_TYPE(u_getUnicodeProperties(c, -1)); |
| if(type>U_NT_NUMERIC) { |
| /* keep internal variants of U_NT_NUMERIC from becoming visible */ |
| type=U_NT_NUMERIC; |
| } |
| return type; |
| case UCHAR_SCRIPT: |
| errorCode=U_ZERO_ERROR; |
| return (int32_t)uscript_getScript(c, &errorCode); |
| case UCHAR_HANGUL_SYLLABLE_TYPE: |
| return uchar_getHST(c); |
| #if !UCONFIG_NO_NORMALIZATION |
| case UCHAR_NFD_QUICK_CHECK: |
| case UCHAR_NFKD_QUICK_CHECK: |
| case UCHAR_NFC_QUICK_CHECK: |
| case UCHAR_NFKC_QUICK_CHECK: |
| return (int32_t)unorm_getQuickCheck(c, (UNormalizationMode)(which-UCHAR_NFD_QUICK_CHECK)+UNORM_NFD); |
| case UCHAR_LEAD_CANONICAL_COMBINING_CLASS: |
| return unorm_getFCD16FromCodePoint(c)>>8; |
| case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS: |
| return unorm_getFCD16FromCodePoint(c)&0xff; |
| #endif |
| case UCHAR_GRAPHEME_CLUSTER_BREAK: |
| return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT; |
| case UCHAR_SENTENCE_BREAK: |
| return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_SB_MASK)>>UPROPS_SB_SHIFT; |
| case UCHAR_WORD_BREAK: |
| return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_WB_MASK)>>UPROPS_WB_SHIFT; |
| default: |
| return 0; /* undefined */ |
| } |
| } else if(which==UCHAR_GENERAL_CATEGORY_MASK) { |
| return U_MASK(u_charType(c)); |
| } else { |
| 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_BINARY_START) { |
| return -1; /* undefined */ |
| } else if(which<UCHAR_BINARY_LIMIT) { |
| return 1; /* maximum TRUE for all binary properties */ |
| } else if(which<UCHAR_INT_START) { |
| return -1; /* undefined */ |
| } else if(which<UCHAR_INT_LIMIT) { |
| switch(which) { |
| case UCHAR_BIDI_CLASS: |
| case UCHAR_JOINING_GROUP: |
| case UCHAR_JOINING_TYPE: |
| return ubidi_getMaxValue(GET_BIDI_PROPS(), which); |
| case UCHAR_BLOCK: |
| return (uprv_getMaxValues(0)&UPROPS_BLOCK_MASK)>>UPROPS_BLOCK_SHIFT; |
| case UCHAR_CANONICAL_COMBINING_CLASS: |
| case UCHAR_LEAD_CANONICAL_COMBINING_CLASS: |
| case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS: |
| return 0xff; /* TODO do we need to be more precise, getting the actual maximum? */ |
| case UCHAR_DECOMPOSITION_TYPE: |
| return uprv_getMaxValues(2)&UPROPS_DT_MASK; |
| case UCHAR_EAST_ASIAN_WIDTH: |
| return (uprv_getMaxValues(0)&UPROPS_EA_MASK)>>UPROPS_EA_SHIFT; |
| case UCHAR_GENERAL_CATEGORY: |
| return (int32_t)U_CHAR_CATEGORY_COUNT-1; |
| case UCHAR_LINE_BREAK: |
| return (uprv_getMaxValues(0)&UPROPS_LB_MASK)>>UPROPS_LB_SHIFT; |
| case UCHAR_NUMERIC_TYPE: |
| return (int32_t)U_NT_COUNT-1; |
| case UCHAR_SCRIPT: |
| return uprv_getMaxValues(0)&UPROPS_SCRIPT_MASK; |
| case UCHAR_HANGUL_SYLLABLE_TYPE: |
| return (int32_t)U_HST_COUNT-1; |
| #if !UCONFIG_NO_NORMALIZATION |
| case UCHAR_NFD_QUICK_CHECK: |
| case UCHAR_NFKD_QUICK_CHECK: |
| return (int32_t)UNORM_YES; /* these are never "maybe", only "no" or "yes" */ |
| case UCHAR_NFC_QUICK_CHECK: |
| case UCHAR_NFKC_QUICK_CHECK: |
| return (int32_t)UNORM_MAYBE; |
| #endif |
| case UCHAR_GRAPHEME_CLUSTER_BREAK: |
| return (uprv_getMaxValues(2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT; |
| case UCHAR_SENTENCE_BREAK: |
| return (uprv_getMaxValues(2)&UPROPS_SB_MASK)>>UPROPS_SB_SHIFT; |
| case UCHAR_WORD_BREAK: |
| return (uprv_getMaxValues(2)&UPROPS_WB_MASK)>>UPROPS_WB_SHIFT; |
| default: |
| return -1; /* undefined */ |
| } |
| } else { |
| return -1; /* undefined */ |
| } |
| } |
| |
| U_CAPI UPropertySource U_EXPORT2 |
| uprops_getSource(UProperty which) { |
| if(which<UCHAR_BINARY_START) { |
| return UPROPS_SRC_NONE; /* undefined */ |
| } else if(which<UCHAR_BINARY_LIMIT) { |
| if(binProps[which].mask!=0) { |
| return UPROPS_SRC_PROPSVEC; |
| } else { |
| return (UPropertySource)binProps[which].column; |
| } |
| } else if(which<UCHAR_INT_START) { |
| return UPROPS_SRC_NONE; /* undefined */ |
| } else if(which<UCHAR_INT_LIMIT) { |
| switch(which) { |
| case UCHAR_GENERAL_CATEGORY: |
| case UCHAR_NUMERIC_TYPE: |
| return UPROPS_SRC_CHAR; |
| |
| case UCHAR_HANGUL_SYLLABLE_TYPE: |
| return UPROPS_SRC_HST; |
| |
| case UCHAR_CANONICAL_COMBINING_CLASS: |
| case UCHAR_NFD_QUICK_CHECK: |
| case UCHAR_NFKD_QUICK_CHECK: |
| case UCHAR_NFC_QUICK_CHECK: |
| case UCHAR_NFKC_QUICK_CHECK: |
| case UCHAR_LEAD_CANONICAL_COMBINING_CLASS: |
| case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS: |
| return UPROPS_SRC_NORM; |
| |
| case UCHAR_BIDI_CLASS: |
| case UCHAR_JOINING_GROUP: |
| case UCHAR_JOINING_TYPE: |
| return UPROPS_SRC_BIDI; |
| |
| default: |
| return UPROPS_SRC_PROPSVEC; |
| } |
| } 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 { |
| return UPROPS_SRC_NONE; /* undefined */ |
| } |
| } |
| |
| /*---------------------------------------------------------------- |
| * Inclusions list |
| *----------------------------------------------------------------*/ |
| |
| /* |
| * Return a set of characters for property enumeration. |
| * The set implicitly contains 0x110000 as well, which is one more than the highest |
| * Unicode code point. |
| * |
| * This set is used as an ordered list - its code points are ordered, and |
| * consecutive code points (in Unicode code point order) in the set define a range. |
| * For each two consecutive characters (start, limit) in the set, |
| * all of the UCD/normalization and related properties for |
| * all code points start..limit-1 are all the same, |
| * except for character names and ISO comments. |
| * |
| * All Unicode code points U+0000..U+10ffff are covered by these ranges. |
| * The ranges define a partition of the Unicode code space. |
| * ICU uses the inclusions set to enumerate properties for generating |
| * UnicodeSets containing all code points that have a certain property value. |
| * |
| * The Inclusion List is generated from the UCD. It is generated |
| * by enumerating the data tries, and code points for hardcoded properties |
| * are added as well. |
| * |
| * -------------------------------------------------------------------------- |
| * |
| * The following are ideas for getting properties-unique code point ranges, |
| * with possible optimizations beyond the current implementation. |
| * These optimizations would require more code and be more fragile. |
| * The current implementation generates one single list (set) for all properties. |
| * |
| * To enumerate properties efficiently, one needs to know ranges of |
| * repetitive values, so that the value of only each start code point |
| * can be applied to the whole range. |
| * This information is in principle available in the uprops.icu/unorm.icu data. |
| * |
| * There are two obstacles: |
| * |
| * 1. Some properties are computed from multiple data structures, |
| * making it necessary to get repetitive ranges by intersecting |
| * ranges from multiple tries. |
| * |
| * 2. It is not economical to write code for getting repetitive ranges |
| * that are precise for each of some 50 properties. |
| * |
| * Compromise ideas: |
| * |
| * - Get ranges per trie, not per individual property. |
| * Each range contains the same values for a whole group of properties. |
| * This would generate currently five range sets, two for uprops.icu tries |
| * and three for unorm.icu tries. |
| * |
| * - Combine sets of ranges for multiple tries to get sufficient sets |
| * for properties, e.g., the uprops.icu main and auxiliary tries |
| * for all non-normalization properties. |
| * |
| * Ideas for representing ranges and combining them: |
| * |
| * - A UnicodeSet could hold just the start code points of ranges. |
| * Multiple sets are easily combined by or-ing them together. |
| * |
| * - Alternatively, a UnicodeSet could hold each even-numbered range. |
| * All ranges could be enumerated by using each start code point |
| * (for the even-numbered ranges) as well as each limit (end+1) code point |
| * (for the odd-numbered ranges). |
| * It should be possible to combine two such sets by xor-ing them, |
| * but no more than two. |
| * |
| * The second way to represent ranges may(?!) yield smaller UnicodeSet arrays, |
| * but the first one is certainly simpler and applicable for combining more than |
| * two range sets. |
| * |
| * It is possible to combine all range sets for all uprops/unorm tries into one |
| * set that can be used for all properties. |
| * As an optimization, there could be less-combined range sets for certain |
| * groups of properties. |
| * The relationship of which less-combined range set to use for which property |
| * depends on the implementation of the properties and must be hardcoded |
| * - somewhat error-prone and higher maintenance but can be tested easily |
| * by building property sets "the simple way" in test code. |
| * |
| * --- |
| * |
| * Do not use a UnicodeSet pattern because that causes infinite recursion; |
| * UnicodeSet depends on the inclusions set. |
| * |
| * --- |
| * |
| * uprv_getInclusions() is commented out starting 2004-sep-13 because |
| * uniset_props.cpp now calls the uxyz_addPropertyStarts() directly, |
| * and only for the relevant property source. |
| */ |
| #if 0 |
| |
| U_CAPI void U_EXPORT2 |
| uprv_getInclusions(const USetAdder *sa, UErrorCode *pErrorCode) { |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return; |
| } |
| |
| #if !UCONFIG_NO_NORMALIZATION |
| unorm_addPropertyStarts(sa, pErrorCode); |
| #endif |
| uchar_addPropertyStarts(sa, pErrorCode); |
| uhst_addPropertyStarts(sa, pErrorCode); |
| ucase_addPropertyStarts(ucase_getSingleton(pErrorCode), sa, pErrorCode); |
| ubidi_addPropertyStarts(ubidi_getSingleton(pErrorCode), sa, pErrorCode); |
| } |
| |
| #endif |
