Index: icu46/source/common/ubidi_props.c |
=================================================================== |
--- icu46/source/common/ubidi_props.c (revision 0) |
+++ icu46/source/common/ubidi_props.c (revision 0) |
@@ -0,0 +1,220 @@ |
+/* |
+******************************************************************************* |
+* |
+* Copyright (C) 2004-2010, 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 "umutex.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.c is machine-generated by genbidi --csource */ |
+#include "ubidi_props_data.c" |
+ |
+/* 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; |
+ 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); |
+} |
+ |
+U_CFUNC UChar32 |
+ubidi_getMirror(const UBiDiProps *bdp, UChar32 c) { |
+ uint16_t props=UTRIE2_GET16(&bdp->trie, c); |
+ int32_t delta=((int16_t)props)>>UBIDI_MIRROR_DELTA_SHIFT; |
+ 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 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; |
+ } |
+} |
+ |
+/* 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); |
+} |
Property changes on: icu46/source/common/ubidi_props.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |