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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /intl/icu/source/common/ubidi_props.c
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Add m-esr52 at 52.6.0
Diffstat (limited to 'intl/icu/source/common/ubidi_props.c')
-rw-r--r--intl/icu/source/common/ubidi_props.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/intl/icu/source/common/ubidi_props.c b/intl/icu/source/common/ubidi_props.c
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+++ b/intl/icu/source/common/ubidi_props.c
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+* Copyright (C) 2004-2014, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+*******************************************************************************
+* file name: ubidi_props.c
+* encoding: US-ASCII
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 2004dec30
+* created by: Markus W. Scherer
+*
+* Low-level Unicode bidi/shaping properties access.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/uset.h"
+#include "unicode/udata.h" /* UDataInfo */
+#include "ucmndata.h" /* DataHeader */
+#include "udatamem.h"
+#include "uassert.h"
+#include "cmemory.h"
+#include "utrie2.h"
+#include "ubidi_props.h"
+#include "ucln_cmn.h"
+
+struct UBiDiProps {
+ UDataMemory *mem;
+ const int32_t *indexes;
+ const uint32_t *mirrors;
+ const uint8_t *jgArray;
+ const uint8_t *jgArray2;
+
+ UTrie2 trie;
+ uint8_t formatVersion[4];
+};
+
+/* ubidi_props_data.h is machine-generated by genbidi --csource */
+#define INCLUDED_FROM_UBIDI_PROPS_C
+#include "ubidi_props_data.h"
+
+/* UBiDiProps singleton ----------------------------------------------------- */
+
+U_CFUNC const UBiDiProps *
+ubidi_getSingleton() {
+ return &ubidi_props_singleton;
+}
+
+/* set of property starts for UnicodeSet ------------------------------------ */
+
+static UBool U_CALLCONV
+_enumPropertyStartsRange(const void *context, UChar32 start, UChar32 end, uint32_t value) {
+ /* add the start code point to the USet */
+ const USetAdder *sa=(const USetAdder *)context;
+ sa->add(sa->set, start);
+ return TRUE;
+}
+
+U_CFUNC void
+ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode) {
+ int32_t i, length;
+ UChar32 c, start, limit;
+
+ const uint8_t *jgArray;
+ uint8_t prev, jg;
+
+ if(U_FAILURE(*pErrorCode)) {
+ return;
+ }
+
+ /* add the start code point of each same-value range of the trie */
+ utrie2_enum(&bdp->trie, NULL, _enumPropertyStartsRange, sa);
+
+ /* add the code points from the bidi mirroring table */
+ length=bdp->indexes[UBIDI_IX_MIRROR_LENGTH];
+ for(i=0; i<length; ++i) {
+ c=UBIDI_GET_MIRROR_CODE_POINT(bdp->mirrors[i]);
+ sa->addRange(sa->set, c, c+1);
+ }
+
+ /* add the code points from the Joining_Group array where the value changes */
+ start=bdp->indexes[UBIDI_IX_JG_START];
+ limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
+ jgArray=bdp->jgArray;
+ for(;;) {
+ prev=0;
+ while(start<limit) {
+ jg=*jgArray++;
+ if(jg!=prev) {
+ sa->add(sa->set, start);
+ prev=jg;
+ }
+ ++start;
+ }
+ if(prev!=0) {
+ /* add the limit code point if the last value was not 0 (it is now start==limit) */
+ sa->add(sa->set, limit);
+ }
+ if(limit==bdp->indexes[UBIDI_IX_JG_LIMIT]) {
+ /* switch to the second Joining_Group range */
+ start=bdp->indexes[UBIDI_IX_JG_START2];
+ limit=bdp->indexes[UBIDI_IX_JG_LIMIT2];
+ jgArray=bdp->jgArray2;
+ } else {
+ break;
+ }
+ }
+
+ /* add code points with hardcoded properties, plus the ones following them */
+
+ /* (none right now) */
+}
+
+/* property access functions ------------------------------------------------ */
+
+U_CFUNC int32_t
+ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which) {
+ int32_t max;
+
+ if(bdp==NULL) {
+ return -1;
+ }
+
+ max=bdp->indexes[UBIDI_MAX_VALUES_INDEX];
+ switch(which) {
+ case UCHAR_BIDI_CLASS:
+ return (max&UBIDI_CLASS_MASK);
+ case UCHAR_JOINING_GROUP:
+ return (max&UBIDI_MAX_JG_MASK)>>UBIDI_MAX_JG_SHIFT;
+ case UCHAR_JOINING_TYPE:
+ return (max&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT;
+ case UCHAR_BIDI_PAIRED_BRACKET_TYPE:
+ return (max&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT;
+ default:
+ return -1; /* undefined */
+ }
+}
+
+U_CAPI UCharDirection
+ubidi_getClass(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UCharDirection)UBIDI_GET_CLASS(props);
+}
+
+U_CFUNC UBool
+ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UBool)UBIDI_GET_FLAG(props, UBIDI_IS_MIRRORED_SHIFT);
+}
+
+static UChar32
+getMirror(const UBiDiProps *bdp, UChar32 c, uint16_t props) {
+ int32_t delta=UBIDI_GET_MIRROR_DELTA(props);
+ if(delta!=UBIDI_ESC_MIRROR_DELTA) {
+ return c+delta;
+ } else {
+ /* look for mirror code point in the mirrors[] table */
+ const uint32_t *mirrors;
+ uint32_t m;
+ int32_t i, length;
+ UChar32 c2;
+
+ mirrors=bdp->mirrors;
+ length=bdp->indexes[UBIDI_IX_MIRROR_LENGTH];
+
+ /* linear search */
+ for(i=0; i<length; ++i) {
+ m=mirrors[i];
+ c2=UBIDI_GET_MIRROR_CODE_POINT(m);
+ if(c==c2) {
+ /* found c, return its mirror code point using the index in m */
+ return UBIDI_GET_MIRROR_CODE_POINT(mirrors[UBIDI_GET_MIRROR_INDEX(m)]);
+ } else if(c<c2) {
+ break;
+ }
+ }
+
+ /* c not found, return it itself */
+ return c;
+ }
+}
+
+U_CFUNC UChar32
+ubidi_getMirror(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return getMirror(bdp, c, props);
+}
+
+U_CFUNC UBool
+ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UBool)UBIDI_GET_FLAG(props, UBIDI_BIDI_CONTROL_SHIFT);
+}
+
+U_CFUNC UBool
+ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UBool)UBIDI_GET_FLAG(props, UBIDI_JOIN_CONTROL_SHIFT);
+}
+
+U_CFUNC UJoiningType
+ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UJoiningType)((props&UBIDI_JT_MASK)>>UBIDI_JT_SHIFT);
+}
+
+U_CFUNC UJoiningGroup
+ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c) {
+ UChar32 start, limit;
+
+ start=bdp->indexes[UBIDI_IX_JG_START];
+ limit=bdp->indexes[UBIDI_IX_JG_LIMIT];
+ if(start<=c && c<limit) {
+ return (UJoiningGroup)bdp->jgArray[c-start];
+ }
+ start=bdp->indexes[UBIDI_IX_JG_START2];
+ limit=bdp->indexes[UBIDI_IX_JG_LIMIT2];
+ if(start<=c && c<limit) {
+ return (UJoiningGroup)bdp->jgArray2[c-start];
+ }
+ return U_JG_NO_JOINING_GROUP;
+}
+
+U_CFUNC UBidiPairedBracketType
+ubidi_getPairedBracketType(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ return (UBidiPairedBracketType)((props&UBIDI_BPT_MASK)>>UBIDI_BPT_SHIFT);
+}
+
+U_CFUNC UChar32
+ubidi_getPairedBracket(const UBiDiProps *bdp, UChar32 c) {
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c);
+ if((props&UBIDI_BPT_MASK)==0) {
+ return c;
+ } else {
+ return getMirror(bdp, c, props);
+ }
+}
+
+/* public API (see uchar.h) ------------------------------------------------- */
+
+U_CFUNC UCharDirection
+u_charDirection(UChar32 c) {
+ return ubidi_getClass(&ubidi_props_singleton, c);
+}
+
+U_CFUNC UBool
+u_isMirrored(UChar32 c) {
+ return ubidi_isMirrored(&ubidi_props_singleton, c);
+}
+
+U_CFUNC UChar32
+u_charMirror(UChar32 c) {
+ return ubidi_getMirror(&ubidi_props_singleton, c);
+}
+
+U_STABLE UChar32 U_EXPORT2
+u_getBidiPairedBracket(UChar32 c) {
+ return ubidi_getPairedBracket(&ubidi_props_singleton, c);
+}