The Tor Browser: intl/icu/source/common/ubidi_props.c@fc2d59ddac77 (annotated)

intl/icu/source/common/ubidi_props.c@fc2d59ddac77 (annotated)

intl/icu/source/common/ubidi_props.c

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
 *******************************************************************************
 *
 *   Copyright (C) 2004-2013, 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;
     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;
     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);
     }
     /* 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];
     } else {
         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);
 }

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intl/icu/source/common/ubidi_props.c@fc2d59ddac77 (annotated)

intl/icu/source/common/ubidi_props.c