547 lines
21 KiB
C
547 lines
21 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2002-2008, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uprops.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2002feb24
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* created by: Markus W. Scherer
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*
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* Implementations for mostly non-core Unicode character properties
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* stored in uprops.icu.
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*
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* With the APIs implemented here, almost all properties files and
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* their associated implementation files are used from this file,
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* including those for normalization and case mappings.
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*/
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#include "unicode/utypes.h"
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#include "unicode/uchar.h"
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#include "unicode/uscript.h"
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#include "cstring.h"
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#include "ucln_cmn.h"
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#include "umutex.h"
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#include "unormimp.h"
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#include "ubidi_props.h"
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#include "uprops.h"
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#include "ucase.h"
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#define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
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/* cleanup ------------------------------------------------------------------ */
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static const UBiDiProps *gBdp=NULL;
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static UBool U_CALLCONV uprops_cleanup(void) {
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gBdp=NULL;
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return TRUE;
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}
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/* bidi/shaping properties API ---------------------------------------------- */
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/* get the UBiDiProps singleton, or else its dummy, once and for all */
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static const UBiDiProps *
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getBiDiProps() {
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/*
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* This lazy intialization with double-checked locking (without mutex protection for
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* the initial check) is transiently unsafe under certain circumstances.
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* Check the readme and use u_init() if necessary.
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*/
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/* the initial check is performed by the GET_BIDI_PROPS() macro */
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const UBiDiProps *bdp;
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UErrorCode errorCode=U_ZERO_ERROR;
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bdp=ubidi_getSingleton(&errorCode);
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#if !UBIDI_HARDCODE_DATA
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if(U_FAILURE(errorCode)) {
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errorCode=U_ZERO_ERROR;
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bdp=ubidi_getDummy(&errorCode);
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if(U_FAILURE(errorCode)) {
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return NULL;
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}
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}
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#endif
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umtx_lock(NULL);
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if(gBdp==NULL) {
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gBdp=bdp;
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ucln_common_registerCleanup(UCLN_COMMON_UPROPS, uprops_cleanup);
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}
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umtx_unlock(NULL);
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return gBdp;
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}
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/* see comment for GET_CASE_PROPS() */
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#define GET_BIDI_PROPS() (gBdp!=NULL ? gBdp : getBiDiProps())
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/* general properties API functions ----------------------------------------- */
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static const struct {
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int32_t column;
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uint32_t mask;
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} binProps[UCHAR_BINARY_LIMIT]={
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/*
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* column and mask values for binary properties from u_getUnicodeProperties().
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* Must be in order of corresponding UProperty,
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* and there must be exacly one entry per binary UProperty.
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*
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* Properties with mask 0 are handled in code.
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* For them, column is the UPropertySource value.
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*/
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{ 1, U_MASK(UPROPS_ALPHABETIC) },
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{ 1, U_MASK(UPROPS_ASCII_HEX_DIGIT) },
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{ UPROPS_SRC_BIDI, 0 }, /* UCHAR_BIDI_CONTROL */
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{ UPROPS_SRC_BIDI, 0 }, /* UCHAR_BIDI_MIRRORED */
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{ 1, U_MASK(UPROPS_DASH) },
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{ 1, U_MASK(UPROPS_DEFAULT_IGNORABLE_CODE_POINT) },
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{ 1, U_MASK(UPROPS_DEPRECATED) },
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{ 1, U_MASK(UPROPS_DIACRITIC) },
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{ 1, U_MASK(UPROPS_EXTENDER) },
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_FULL_COMPOSITION_EXCLUSION */
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{ 1, U_MASK(UPROPS_GRAPHEME_BASE) },
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{ 1, U_MASK(UPROPS_GRAPHEME_EXTEND) },
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{ 1, U_MASK(UPROPS_GRAPHEME_LINK) },
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{ 1, U_MASK(UPROPS_HEX_DIGIT) },
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{ 1, U_MASK(UPROPS_HYPHEN) },
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{ 1, U_MASK(UPROPS_ID_CONTINUE) },
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{ 1, U_MASK(UPROPS_ID_START) },
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{ 1, U_MASK(UPROPS_IDEOGRAPHIC) },
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{ 1, U_MASK(UPROPS_IDS_BINARY_OPERATOR) },
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{ 1, U_MASK(UPROPS_IDS_TRINARY_OPERATOR) },
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{ UPROPS_SRC_BIDI, 0 }, /* UCHAR_JOIN_CONTROL */
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{ 1, U_MASK(UPROPS_LOGICAL_ORDER_EXCEPTION) },
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{ UPROPS_SRC_CASE, 0 }, /* UCHAR_LOWERCASE */
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{ 1, U_MASK(UPROPS_MATH) },
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{ 1, U_MASK(UPROPS_NONCHARACTER_CODE_POINT) },
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{ 1, U_MASK(UPROPS_QUOTATION_MARK) },
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{ 1, U_MASK(UPROPS_RADICAL) },
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{ UPROPS_SRC_CASE, 0 }, /* UCHAR_SOFT_DOTTED */
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{ 1, U_MASK(UPROPS_TERMINAL_PUNCTUATION) },
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{ 1, U_MASK(UPROPS_UNIFIED_IDEOGRAPH) },
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{ UPROPS_SRC_CASE, 0 }, /* UCHAR_UPPERCASE */
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{ 1, U_MASK(UPROPS_WHITE_SPACE) },
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{ 1, U_MASK(UPROPS_XID_CONTINUE) },
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{ 1, U_MASK(UPROPS_XID_START) },
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{ UPROPS_SRC_CASE, 0 }, /* UCHAR_CASE_SENSITIVE */
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{ 2, U_MASK(UPROPS_V2_S_TERM) },
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{ 2, U_MASK(UPROPS_V2_VARIATION_SELECTOR) },
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_NFD_INERT */
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_NFKD_INERT */
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_NFC_INERT */
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_NFKC_INERT */
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{ UPROPS_SRC_NORM, 0 }, /* UCHAR_SEGMENT_STARTER */
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{ 2, U_MASK(UPROPS_V2_PATTERN_SYNTAX) },
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{ 2, U_MASK(UPROPS_V2_PATTERN_WHITE_SPACE) },
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{ UPROPS_SRC_CHAR_AND_PROPSVEC, 0 }, /* UCHAR_POSIX_ALNUM */
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{ UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_BLANK */
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{ UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_GRAPH */
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{ UPROPS_SRC_CHAR, 0 }, /* UCHAR_POSIX_PRINT */
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{ UPROPS_SRC_CHAR, 0 } /* UCHAR_POSIX_XDIGIT */
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};
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U_CAPI UBool U_EXPORT2
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u_hasBinaryProperty(UChar32 c, UProperty which) {
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/* c is range-checked in the functions that are called from here */
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if(which<UCHAR_BINARY_START || UCHAR_BINARY_LIMIT<=which) {
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/* not a known binary property */
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} else {
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uint32_t mask=binProps[which].mask;
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int32_t column=binProps[which].column;
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if(mask!=0) {
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/* systematic, directly stored properties */
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return (u_getUnicodeProperties(c, column)&mask)!=0;
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} else {
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if(column==UPROPS_SRC_CASE) {
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return ucase_hasBinaryProperty(c, which);
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} else if(column==UPROPS_SRC_NORM) {
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#if !UCONFIG_NO_NORMALIZATION
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/* normalization properties from unorm.icu */
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switch(which) {
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case UCHAR_FULL_COMPOSITION_EXCLUSION:
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return unorm_internalIsFullCompositionExclusion(c);
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case UCHAR_NFD_INERT:
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case UCHAR_NFKD_INERT:
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case UCHAR_NFC_INERT:
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case UCHAR_NFKC_INERT:
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return unorm_isNFSkippable(c, (UNormalizationMode)(which-UCHAR_NFD_INERT+UNORM_NFD));
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case UCHAR_SEGMENT_STARTER:
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return unorm_isCanonSafeStart(c);
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default:
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break;
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}
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#endif
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} else if(column==UPROPS_SRC_BIDI) {
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/* bidi/shaping properties */
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const UBiDiProps *bdp=GET_BIDI_PROPS();
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if(bdp!=NULL) {
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switch(which) {
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case UCHAR_BIDI_MIRRORED:
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return ubidi_isMirrored(bdp, c);
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case UCHAR_BIDI_CONTROL:
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return ubidi_isBidiControl(bdp, c);
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case UCHAR_JOIN_CONTROL:
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return ubidi_isJoinControl(bdp, c);
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default:
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break;
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}
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}
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/* else return FALSE below */
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} else if(column==UPROPS_SRC_CHAR) {
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switch(which) {
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case UCHAR_POSIX_BLANK:
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return u_isblank(c);
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case UCHAR_POSIX_GRAPH:
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return u_isgraphPOSIX(c);
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case UCHAR_POSIX_PRINT:
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return u_isprintPOSIX(c);
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case UCHAR_POSIX_XDIGIT:
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return u_isxdigit(c);
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default:
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break;
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}
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} else if(column==UPROPS_SRC_CHAR_AND_PROPSVEC) {
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switch(which) {
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case UCHAR_POSIX_ALNUM:
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return u_isalnumPOSIX(c);
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default:
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break;
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}
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}
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}
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}
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return FALSE;
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}
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U_CAPI int32_t U_EXPORT2
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u_getIntPropertyValue(UChar32 c, UProperty which) {
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UErrorCode errorCode;
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int32_t type;
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if(which<UCHAR_BINARY_START) {
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return 0; /* undefined */
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} else if(which<UCHAR_BINARY_LIMIT) {
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return (int32_t)u_hasBinaryProperty(c, which);
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} else if(which<UCHAR_INT_START) {
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return 0; /* undefined */
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} else if(which<UCHAR_INT_LIMIT) {
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switch(which) {
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case UCHAR_BIDI_CLASS:
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return (int32_t)u_charDirection(c);
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case UCHAR_BLOCK:
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return (int32_t)ublock_getCode(c);
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case UCHAR_CANONICAL_COMBINING_CLASS:
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#if !UCONFIG_NO_NORMALIZATION
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return u_getCombiningClass(c);
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#else
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return 0;
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#endif
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case UCHAR_DECOMPOSITION_TYPE:
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return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_DT_MASK);
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case UCHAR_EAST_ASIAN_WIDTH:
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return (int32_t)(u_getUnicodeProperties(c, 0)&UPROPS_EA_MASK)>>UPROPS_EA_SHIFT;
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case UCHAR_GENERAL_CATEGORY:
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return (int32_t)u_charType(c);
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case UCHAR_JOINING_GROUP:
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return ubidi_getJoiningGroup(GET_BIDI_PROPS(), c);
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case UCHAR_JOINING_TYPE:
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return ubidi_getJoiningType(GET_BIDI_PROPS(), c);
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case UCHAR_LINE_BREAK:
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return (int32_t)(u_getUnicodeProperties(c, 0)&UPROPS_LB_MASK)>>UPROPS_LB_SHIFT;
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case UCHAR_NUMERIC_TYPE:
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type=(int32_t)GET_NUMERIC_TYPE(u_getUnicodeProperties(c, -1));
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if(type>U_NT_NUMERIC) {
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/* keep internal variants of U_NT_NUMERIC from becoming visible */
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type=U_NT_NUMERIC;
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}
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return type;
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case UCHAR_SCRIPT:
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errorCode=U_ZERO_ERROR;
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return (int32_t)uscript_getScript(c, &errorCode);
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case UCHAR_HANGUL_SYLLABLE_TYPE:
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return uchar_getHST(c);
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#if !UCONFIG_NO_NORMALIZATION
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case UCHAR_NFD_QUICK_CHECK:
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case UCHAR_NFKD_QUICK_CHECK:
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case UCHAR_NFC_QUICK_CHECK:
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case UCHAR_NFKC_QUICK_CHECK:
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return (int32_t)unorm_getQuickCheck(c, (UNormalizationMode)(which-UCHAR_NFD_QUICK_CHECK+UNORM_NFD));
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case UCHAR_LEAD_CANONICAL_COMBINING_CLASS:
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return unorm_getFCD16FromCodePoint(c)>>8;
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case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS:
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return unorm_getFCD16FromCodePoint(c)&0xff;
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#endif
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case UCHAR_GRAPHEME_CLUSTER_BREAK:
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return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT;
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case UCHAR_SENTENCE_BREAK:
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return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_SB_MASK)>>UPROPS_SB_SHIFT;
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case UCHAR_WORD_BREAK:
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return (int32_t)(u_getUnicodeProperties(c, 2)&UPROPS_WB_MASK)>>UPROPS_WB_SHIFT;
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default:
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return 0; /* undefined */
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}
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} else if(which==UCHAR_GENERAL_CATEGORY_MASK) {
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return U_MASK(u_charType(c));
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} else {
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return 0; /* undefined */
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}
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}
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U_CAPI int32_t U_EXPORT2
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u_getIntPropertyMinValue(UProperty which) {
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return 0; /* all binary/enum/int properties have a minimum value of 0 */
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}
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U_CAPI int32_t U_EXPORT2
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u_getIntPropertyMaxValue(UProperty which) {
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if(which<UCHAR_BINARY_START) {
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return -1; /* undefined */
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} else if(which<UCHAR_BINARY_LIMIT) {
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return 1; /* maximum TRUE for all binary properties */
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} else if(which<UCHAR_INT_START) {
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return -1; /* undefined */
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} else if(which<UCHAR_INT_LIMIT) {
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switch(which) {
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case UCHAR_BIDI_CLASS:
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case UCHAR_JOINING_GROUP:
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case UCHAR_JOINING_TYPE:
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return ubidi_getMaxValue(GET_BIDI_PROPS(), which);
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case UCHAR_BLOCK:
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return (uprv_getMaxValues(0)&UPROPS_BLOCK_MASK)>>UPROPS_BLOCK_SHIFT;
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case UCHAR_CANONICAL_COMBINING_CLASS:
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case UCHAR_LEAD_CANONICAL_COMBINING_CLASS:
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case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS:
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return 0xff; /* TODO do we need to be more precise, getting the actual maximum? */
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case UCHAR_DECOMPOSITION_TYPE:
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return uprv_getMaxValues(2)&UPROPS_DT_MASK;
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case UCHAR_EAST_ASIAN_WIDTH:
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return (uprv_getMaxValues(0)&UPROPS_EA_MASK)>>UPROPS_EA_SHIFT;
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case UCHAR_GENERAL_CATEGORY:
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return (int32_t)U_CHAR_CATEGORY_COUNT-1;
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case UCHAR_LINE_BREAK:
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return (uprv_getMaxValues(0)&UPROPS_LB_MASK)>>UPROPS_LB_SHIFT;
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case UCHAR_NUMERIC_TYPE:
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return (int32_t)U_NT_COUNT-1;
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case UCHAR_SCRIPT:
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return uprv_getMaxValues(0)&UPROPS_SCRIPT_MASK;
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case UCHAR_HANGUL_SYLLABLE_TYPE:
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return (int32_t)U_HST_COUNT-1;
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#if !UCONFIG_NO_NORMALIZATION
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case UCHAR_NFD_QUICK_CHECK:
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case UCHAR_NFKD_QUICK_CHECK:
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return (int32_t)UNORM_YES; /* these are never "maybe", only "no" or "yes" */
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case UCHAR_NFC_QUICK_CHECK:
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case UCHAR_NFKC_QUICK_CHECK:
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return (int32_t)UNORM_MAYBE;
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#endif
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case UCHAR_GRAPHEME_CLUSTER_BREAK:
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return (uprv_getMaxValues(2)&UPROPS_GCB_MASK)>>UPROPS_GCB_SHIFT;
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case UCHAR_SENTENCE_BREAK:
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return (uprv_getMaxValues(2)&UPROPS_SB_MASK)>>UPROPS_SB_SHIFT;
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case UCHAR_WORD_BREAK:
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return (uprv_getMaxValues(2)&UPROPS_WB_MASK)>>UPROPS_WB_SHIFT;
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default:
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return -1; /* undefined */
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}
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} else {
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return -1; /* undefined */
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}
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}
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U_CFUNC UPropertySource U_EXPORT2
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uprops_getSource(UProperty which) {
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if(which<UCHAR_BINARY_START) {
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return UPROPS_SRC_NONE; /* undefined */
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} else if(which<UCHAR_BINARY_LIMIT) {
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if(binProps[which].mask!=0) {
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return UPROPS_SRC_PROPSVEC;
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} else {
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return (UPropertySource)binProps[which].column;
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}
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} else if(which<UCHAR_INT_START) {
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return UPROPS_SRC_NONE; /* undefined */
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} else if(which<UCHAR_INT_LIMIT) {
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switch(which) {
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case UCHAR_GENERAL_CATEGORY:
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case UCHAR_NUMERIC_TYPE:
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return UPROPS_SRC_CHAR;
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case UCHAR_HANGUL_SYLLABLE_TYPE:
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return UPROPS_SRC_HST;
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case UCHAR_CANONICAL_COMBINING_CLASS:
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case UCHAR_NFD_QUICK_CHECK:
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case UCHAR_NFKD_QUICK_CHECK:
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case UCHAR_NFC_QUICK_CHECK:
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case UCHAR_NFKC_QUICK_CHECK:
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case UCHAR_LEAD_CANONICAL_COMBINING_CLASS:
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case UCHAR_TRAIL_CANONICAL_COMBINING_CLASS:
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return UPROPS_SRC_NORM;
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case UCHAR_BIDI_CLASS:
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case UCHAR_JOINING_GROUP:
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case UCHAR_JOINING_TYPE:
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return UPROPS_SRC_BIDI;
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default:
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return UPROPS_SRC_PROPSVEC;
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}
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} else if(which<UCHAR_STRING_START) {
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switch(which) {
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case UCHAR_GENERAL_CATEGORY_MASK:
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case UCHAR_NUMERIC_VALUE:
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return UPROPS_SRC_CHAR;
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default:
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return UPROPS_SRC_NONE;
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}
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} else if(which<UCHAR_STRING_LIMIT) {
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switch(which) {
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case UCHAR_AGE:
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return UPROPS_SRC_PROPSVEC;
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case UCHAR_BIDI_MIRRORING_GLYPH:
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return UPROPS_SRC_BIDI;
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case UCHAR_CASE_FOLDING:
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case UCHAR_LOWERCASE_MAPPING:
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case UCHAR_SIMPLE_CASE_FOLDING:
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case UCHAR_SIMPLE_LOWERCASE_MAPPING:
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case UCHAR_SIMPLE_TITLECASE_MAPPING:
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case UCHAR_SIMPLE_UPPERCASE_MAPPING:
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case UCHAR_TITLECASE_MAPPING:
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case UCHAR_UPPERCASE_MAPPING:
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return UPROPS_SRC_CASE;
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case UCHAR_ISO_COMMENT:
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case UCHAR_NAME:
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case UCHAR_UNICODE_1_NAME:
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return UPROPS_SRC_NAMES;
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default:
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return UPROPS_SRC_NONE;
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}
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} else {
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return UPROPS_SRC_NONE; /* undefined */
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}
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}
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/*----------------------------------------------------------------
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* Inclusions list
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*----------------------------------------------------------------*/
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/*
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* Return a set of characters for property enumeration.
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* The set implicitly contains 0x110000 as well, which is one more than the highest
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* Unicode code point.
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*
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* This set is used as an ordered list - its code points are ordered, and
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* consecutive code points (in Unicode code point order) in the set define a range.
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* For each two consecutive characters (start, limit) in the set,
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* all of the UCD/normalization and related properties for
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* all code points start..limit-1 are all the same,
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* except for character names and ISO comments.
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*
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* All Unicode code points U+0000..U+10ffff are covered by these ranges.
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* The ranges define a partition of the Unicode code space.
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* ICU uses the inclusions set to enumerate properties for generating
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* UnicodeSets containing all code points that have a certain property value.
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*
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* The Inclusion List is generated from the UCD. It is generated
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* by enumerating the data tries, and code points for hardcoded properties
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* are added as well.
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*
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* --------------------------------------------------------------------------
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*
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* The following are ideas for getting properties-unique code point ranges,
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* with possible optimizations beyond the current implementation.
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* These optimizations would require more code and be more fragile.
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* The current implementation generates one single list (set) for all properties.
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*
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* To enumerate properties efficiently, one needs to know ranges of
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* repetitive values, so that the value of only each start code point
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* can be applied to the whole range.
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* This information is in principle available in the uprops.icu/unorm.icu data.
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*
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* There are two obstacles:
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*
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* 1. Some properties are computed from multiple data structures,
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* making it necessary to get repetitive ranges by intersecting
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* ranges from multiple tries.
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*
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* 2. It is not economical to write code for getting repetitive ranges
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* that are precise for each of some 50 properties.
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*
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* Compromise ideas:
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*
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* - Get ranges per trie, not per individual property.
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* Each range contains the same values for a whole group of properties.
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* This would generate currently five range sets, two for uprops.icu tries
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* and three for unorm.icu tries.
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*
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* - Combine sets of ranges for multiple tries to get sufficient sets
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* for properties, e.g., the uprops.icu main and auxiliary tries
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* for all non-normalization properties.
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*
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* Ideas for representing ranges and combining them:
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*
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* - A UnicodeSet could hold just the start code points of ranges.
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* Multiple sets are easily combined by or-ing them together.
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*
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* - Alternatively, a UnicodeSet could hold each even-numbered range.
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* All ranges could be enumerated by using each start code point
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* (for the even-numbered ranges) as well as each limit (end+1) code point
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* (for the odd-numbered ranges).
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* It should be possible to combine two such sets by xor-ing them,
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* but no more than two.
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*
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* The second way to represent ranges may(?!) yield smaller UnicodeSet arrays,
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* but the first one is certainly simpler and applicable for combining more than
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* two range sets.
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*
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* It is possible to combine all range sets for all uprops/unorm tries into one
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* set that can be used for all properties.
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* As an optimization, there could be less-combined range sets for certain
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* groups of properties.
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* The relationship of which less-combined range set to use for which property
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* depends on the implementation of the properties and must be hardcoded
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* - somewhat error-prone and higher maintenance but can be tested easily
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* by building property sets "the simple way" in test code.
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*
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* ---
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*
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* Do not use a UnicodeSet pattern because that causes infinite recursion;
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* UnicodeSet depends on the inclusions set.
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*
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* ---
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*
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* uprv_getInclusions() is commented out starting 2004-sep-13 because
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* uniset_props.cpp now calls the uxyz_addPropertyStarts() directly,
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* and only for the relevant property source.
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*/
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#if 0
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U_CAPI void U_EXPORT2
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uprv_getInclusions(const USetAdder *sa, UErrorCode *pErrorCode) {
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
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return;
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}
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#if !UCONFIG_NO_NORMALIZATION
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unorm_addPropertyStarts(sa, pErrorCode);
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#endif
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uchar_addPropertyStarts(sa, pErrorCode);
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uhst_addPropertyStarts(sa, pErrorCode);
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ucase_addPropertyStarts(ucase_getSingleton(pErrorCode), sa, pErrorCode);
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ubidi_addPropertyStarts(ubidi_getSingleton(pErrorCode), sa, pErrorCode);
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}
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#endif
|