-/*
+/*
******************************************************************************
*
-* Copyright (C) 1999-2001, International Business Machines
+* Copyright (C) 1999-2006, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
#include "unicode/ustring.h"
#include "unicode/uchar.h"
#include "unicode/ubidi.h"
+#include "ubidi_props.h"
#include "ubidiimp.h"
/*
* that look at immediately surrounding types.
*
* As a related topic, this implementation does not remove Boundary Neutral
- * types from the input, but ignores them whereever this is relevant.
+ * types from the input, but ignores them wherever this is relevant.
* For example, the loop for the resolution of the weak types reads
* types until it finds a non-BN.
* Also, explicit embedding codes are neither changed into BN nor removed.
* (L1) is not necessary in adjustWSLevels().
*/
-/* prototypes --------------------------------------------------------------- */
-
-static void
-getDirProps(UBiDi *pBiDi, const UChar *text);
-
-static UBiDiDirection
-resolveExplicitLevels(UBiDi *pBiDi);
-
-static UBiDiDirection
-checkExplicitLevels(UBiDi *pBiDi, UErrorCode *pErrorCode);
-
-static UBiDiDirection
-directionFromFlags(Flags flags);
-
-static void
-resolveImplicitLevels(UBiDi *pBiDi,
- int32_t start, int32_t limit,
- DirProp sor, DirProp eor);
-
-static void
-adjustWSLevels(UBiDi *pBiDi);
-
/* to avoid some conditional statements, use tiny constant arrays */
static const Flags flagLR[2]={ DIRPROP_FLAG(L), DIRPROP_FLAG(R) };
static const Flags flagE[2]={ DIRPROP_FLAG(LRE), DIRPROP_FLAG(RLE) };
/* UBiDi object management -------------------------------------------------- */
U_CAPI UBiDi * U_EXPORT2
-ubidi_open(void)
+ubidi_open(void)
{
UErrorCode errorCode=U_ZERO_ERROR;
return ubidi_openSized(0, 0, &errorCode);
/* reset the object, all pointers NULL, all flags FALSE, all sizes 0 */
uprv_memset(pBiDi, 0, sizeof(UBiDi));
+ /* get BiDi properties */
+ pBiDi->bdp=ubidi_getSingleton(pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ uprv_free(pBiDi);
+ return NULL;
+ }
+
/* allocate memory for arrays as requested */
if(maxLength>0) {
if( !getInitialDirPropsMemory(pBiDi, maxLength) ||
/* not enough memory, and we must not allocate */
return FALSE;
} else if(sizeNeeded!=*pSize && mayAllocate) {
+ /* FOOD FOR THOUGHT: in hope to improve performance, we should
+ * try never shrinking memory, only growing it when required.
+ */
/* we may try to grow or shrink */
void *memory;
U_CAPI void U_EXPORT2
ubidi_close(UBiDi *pBiDi) {
if(pBiDi!=NULL) {
+ pBiDi->pParaBiDi=NULL; /* in case one tries to reuse this block */
if(pBiDi->dirPropsMemory!=NULL) {
uprv_free(pBiDi->dirPropsMemory);
}
if(pBiDi->runsMemory!=NULL) {
uprv_free(pBiDi->runsMemory);
}
+ if(pBiDi->parasMemory!=NULL) {
+ uprv_free(pBiDi->parasMemory);
+ }
+ if(pBiDi->insertPoints.points!=NULL) {
+ uprv_free(pBiDi->insertPoints.points);
+ }
+
uprv_free(pBiDi);
}
}
ubidi_setInverse(UBiDi *pBiDi, UBool isInverse) {
if(pBiDi!=NULL) {
pBiDi->isInverse=isInverse;
+ pBiDi->reorderingMode = isInverse ? UBIDI_REORDER_INVERSE_NUMBERS_AS_L
+ : UBIDI_REORDER_DEFAULT;
}
}
}
}
-/* ubidi_setPara ------------------------------------------------------------ */
-
+/* FOOD FOR THOUGHT: currently the reordering modes are a mixture of
+ * algorithm for direct BiDi, algorithm for inverse BiDi and the bizarre
+ * concept of RUNS_ONLY which is a double operation.
+ * It could be advantageous to divide this into 3 concepts:
+ * a) Operation: direct / inverse / RUNS_ONLY
+ * b) Direct algorithm: default / NUMBERS_SPECIAL / GROUP_NUMBERS_WITH_L
+ * c) Inverse algorithm: default / INVERSE_LIKE_DIRECT / NUMBERS_SPECIAL
+ * This would allow combinations not possible today like RUNS_ONLY with
+ * NUMBERS_SPECIAL.
+ * Also allow to set INSERT_MARKS for the direct step of RUNS_ONLY and
+ * REMOVE_CONTROLS for the inverse step.
+ * Not all combinations would be supported, and probably not all do make sense.
+ * This would need to document which ones are supported and what are the
+ * fallbacks for unsupported combinations.
+ */
U_CAPI void U_EXPORT2
-ubidi_setPara(UBiDi *pBiDi, const UChar *text, int32_t length,
- UBiDiLevel paraLevel, UBiDiLevel *embeddingLevels,
- UErrorCode *pErrorCode) {
- UBiDiDirection direction;
-
- /* check the argument values */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
- return;
- } else if(pBiDi==NULL || text==NULL ||
- ((UBIDI_MAX_EXPLICIT_LEVEL<paraLevel) && !IS_DEFAULT_LEVEL(paraLevel)) ||
- length<-1
- ) {
- *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
- return;
+ubidi_setReorderingMode(UBiDi *pBiDi, UBiDiReorderingMode reorderingMode) {
+ if ((pBiDi != NULL) && (reorderingMode >= UBIDI_REORDER_DEFAULT)
+ && (reorderingMode < UBIDI_REORDER_COUNT)) {
+ pBiDi->reorderingMode = reorderingMode;
+ pBiDi->isInverse = reorderingMode == UBIDI_REORDER_INVERSE_NUMBERS_AS_L;
}
+}
- if(length==-1) {
- length=u_strlen(text);
+U_CAPI UBiDiReorderingMode U_EXPORT2
+ubidi_getReorderingMode(UBiDi *pBiDi) {
+ if (pBiDi != NULL) {
+ return pBiDi->reorderingMode;
+ } else {
+ return UBIDI_REORDER_DEFAULT;
}
+}
- /* initialize the UBiDi structure */
- pBiDi->text=text;
- pBiDi->length=length;
- pBiDi->paraLevel=paraLevel;
- pBiDi->direction=UBIDI_LTR;
- pBiDi->trailingWSStart=length; /* the levels[] will reflect the WS run */
-
- pBiDi->dirProps=NULL;
- pBiDi->levels=NULL;
- pBiDi->runs=NULL;
-
- if(length==0) {
- /*
- * For an empty paragraph, create a UBiDi object with the paraLevel and
- * the flags and the direction set but without allocating zero-length arrays.
- * There is nothing more to do.
- */
- if(IS_DEFAULT_LEVEL(paraLevel)) {
- pBiDi->paraLevel&=1;
- }
- if(paraLevel&1) {
- pBiDi->flags=DIRPROP_FLAG(R);
- pBiDi->direction=UBIDI_RTL;
- } else {
- pBiDi->flags=DIRPROP_FLAG(L);
- pBiDi->direction=UBIDI_LTR;
- }
-
- pBiDi->runCount=0;
- return;
+U_CAPI void U_EXPORT2
+ubidi_setReorderingOptions(UBiDi *pBiDi, uint32_t reorderingOptions) {
+ if (reorderingOptions & UBIDI_OPTION_REMOVE_CONTROLS) {
+ reorderingOptions&=~UBIDI_OPTION_INSERT_MARKS;
}
-
- pBiDi->runCount=-1;
-
- /*
- * Get the directional properties,
- * the flags bit-set, and
- * determine the partagraph level if necessary.
- */
- if(getDirPropsMemory(pBiDi, length)) {
- pBiDi->dirProps=pBiDi->dirPropsMemory;
- getDirProps(pBiDi, text);
- } else {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- return;
+ if (pBiDi != NULL) {
+ pBiDi->reorderingOptions = reorderingOptions;
}
+}
- /* are explicit levels specified? */
- if(embeddingLevels==NULL) {
- /* no: determine explicit levels according to the (Xn) rules */\
- if(getLevelsMemory(pBiDi, length)) {
- pBiDi->levels=pBiDi->levelsMemory;
- direction=resolveExplicitLevels(pBiDi);
- } else {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- return;
- }
+U_CAPI uint32_t U_EXPORT2
+ubidi_getReorderingOptions(UBiDi *pBiDi) {
+ if (pBiDi != NULL) {
+ return pBiDi->reorderingOptions;
} else {
- /* set BN for all explicit codes, check that all levels are paraLevel..UBIDI_MAX_EXPLICIT_LEVEL */
- pBiDi->levels=embeddingLevels;
- direction=checkExplicitLevels(pBiDi, pErrorCode);
- if(U_FAILURE(*pErrorCode)) {
- return;
- }
- }
-
- /*
- * The steps after (X9) in the UBiDi algorithm are performed only if
- * the paragraph text has mixed directionality!
- */
- pBiDi->direction=direction;
- switch(direction) {
- case UBIDI_LTR:
- /* make sure paraLevel is even */
- pBiDi->paraLevel=(UBiDiLevel)((pBiDi->paraLevel+1)&~1);
-
- /* all levels are implicitly at paraLevel (important for ubidi_getLevels()) */
- pBiDi->trailingWSStart=0;
- break;
- case UBIDI_RTL:
- /* make sure paraLevel is odd */
- pBiDi->paraLevel|=1;
-
- /* all levels are implicitly at paraLevel (important for ubidi_getLevels()) */
- pBiDi->trailingWSStart=0;
- break;
- default:
- /*
- * If there are no external levels specified and there
- * are no significant explicit level codes in the text,
- * then we can treat the entire paragraph as one run.
- * Otherwise, we need to perform the following rules on runs of
- * the text with the same embedding levels. (X10)
- * "Significant" explicit level codes are ones that actually
- * affect non-BN characters.
- * Examples for "insignificant" ones are empty embeddings
- * LRE-PDF, LRE-RLE-PDF-PDF, etc.
- */
- if(embeddingLevels==NULL && !(pBiDi->flags&DIRPROP_FLAG_MULTI_RUNS)) {
- resolveImplicitLevels(pBiDi, 0, length,
- GET_LR_FROM_LEVEL(pBiDi->paraLevel),
- GET_LR_FROM_LEVEL(pBiDi->paraLevel));
- } else {
- /* sor, eor: start and end types of same-level-run */
- UBiDiLevel *levels=pBiDi->levels;
- int32_t start, limit=0;
- UBiDiLevel level, nextLevel;
- DirProp sor, eor;
-
- /* determine the first sor and set eor to it because of the loop body (sor=eor there) */
- level=pBiDi->paraLevel;
- nextLevel=levels[0];
- if(level<nextLevel) {
- eor=GET_LR_FROM_LEVEL(nextLevel);
- } else {
- eor=GET_LR_FROM_LEVEL(level);
- }
-
- do {
- /* determine start and limit of the run (end points just behind the run) */
-
- /* the values for this run's start are the same as for the previous run's end */
- sor=eor;
- start=limit;
- level=nextLevel;
-
- /* search for the limit of this run */
- while(++limit<length && levels[limit]==level) {}
-
- /* get the correct level of the next run */
- if(limit<length) {
- nextLevel=levels[limit];
- } else {
- nextLevel=pBiDi->paraLevel;
- }
-
- /* determine eor from max(level, nextLevel); sor is last run's eor */
- if((level&~UBIDI_LEVEL_OVERRIDE)<(nextLevel&~UBIDI_LEVEL_OVERRIDE)) {
- eor=GET_LR_FROM_LEVEL(nextLevel);
- } else {
- eor=GET_LR_FROM_LEVEL(level);
- }
-
- /* if the run consists of overridden directional types, then there
- are no implicit types to be resolved */
- if(!(level&UBIDI_LEVEL_OVERRIDE)) {
- resolveImplicitLevels(pBiDi, start, limit, sor, eor);
- } else {
- /* remove the UBIDI_LEVEL_OVERRIDE flags */
- do {
- levels[start++]&=~UBIDI_LEVEL_OVERRIDE;
- } while(start<limit);
- }
- } while(limit<length);
- }
-
- /* reset the embedding levels for some non-graphic characters (L1), (X9) */
- adjustWSLevels(pBiDi);
-
- /* for "inverse BiDi", ubidi_getRuns() modifies the levels of numeric runs following RTL runs */
- if(pBiDi->isInverse) {
- if(!ubidi_getRuns(pBiDi)) {
- *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
- return;
- }
- }
- break;
+ return 0;
}
}
/*
* Get the directional properties for the text,
* calculate the flags bit-set, and
- * determine the partagraph level if necessary.
+ * determine the paragraph level if necessary.
*/
static void
-getDirProps(UBiDi *pBiDi, const UChar *text) {
+getDirProps(UBiDi *pBiDi) {
+ const UChar *text=pBiDi->text;
DirProp *dirProps=pBiDi->dirPropsMemory; /* pBiDi->dirProps is const */
- int32_t i=0, i0, i1, length=pBiDi->length;
+ int32_t i=0, i0, i1, length=pBiDi->originalLength;
Flags flags=0; /* collect all directionalities in the text */
UChar32 uchar;
- DirProp dirProp;
-
- if(IS_DEFAULT_LEVEL(pBiDi->paraLevel)) {
- /* determine the paragraph level (P2..P3) */
- for(;;) {
- i0=i; /* index of first code unit */
- UTF_NEXT_CHAR(text, i, length, uchar);
- i1=i-1; /* index of last code unit, gets the directional property */
- flags|=DIRPROP_FLAG(dirProps[i1]=dirProp=u_charDirection(uchar));
- if(i1>i0) { /* set previous code units' properties to BN */
- flags|=DIRPROP_FLAG(BN);
- do {
- dirProps[--i1]=BN;
- } while(i1>i0);
- }
-
- if(dirProp==L) {
- pBiDi->paraLevel=0;
- break;
- } else if(dirProp==R || dirProp==AL) {
- pBiDi->paraLevel=1;
- break;
- } else if(i>=length) {
- /*
- * see comment in ubidi.h:
- * the DEFAULT_XXX values are designed so that
- * their bit 0 alone yields the intended default
- */
- pBiDi->paraLevel&=1;
- break;
- }
- }
+ DirProp dirProp=0, paraDirDefault=0;/* initialize to avoid compiler warnings */
+ UBool isDefaultLevel=IS_DEFAULT_LEVEL(pBiDi->paraLevel);
+ /* for inverse BiDi, the default para level is set to RTL if there is a
+ strong character at either end of the text */
+ UBool isDefaultLevelInverse=isDefaultLevel &&
+ (pBiDi->reorderingMode==UBIDI_REORDER_INVERSE_LIKE_DIRECT ||
+ pBiDi->reorderingMode==UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL);
+ int32_t lastArabicPos=-1;
+ int32_t controlCount=0;
+ UBool removeBiDiControls = pBiDi->reorderingOptions &
+ UBIDI_OPTION_REMOVE_CONTROLS;
+
+ typedef enum {
+ NOT_CONTEXTUAL, /* 0: not contextual paraLevel */
+ LOOKING_FOR_STRONG, /* 1: looking for first strong char */
+ FOUND_STRONG_CHAR /* 2: found first strong char */
+ } State;
+ State state;
+ int32_t paraStart=0; /* index of first char in paragraph */
+ DirProp paraDir; /* == CONTEXT_RTL within paragraphs
+ starting with strong R char */
+ DirProp lastStrongDir=0; /* for default level & inverse BiDi */
+ int32_t lastStrongLTR=0; /* for STREAMING option */
+
+ if(pBiDi->reorderingOptions & UBIDI_OPTION_STREAMING) {
+ pBiDi->length=0;
+ lastStrongLTR=0;
}
-
- /* get the rest of the directional properties and the flags bits */
- while(i<length) {
+ if(isDefaultLevel) {
+ paraDirDefault=pBiDi->paraLevel&1 ? CONTEXT_RTL : 0;
+ paraDir=paraDirDefault;
+ lastStrongDir=paraDirDefault;
+ state=LOOKING_FOR_STRONG;
+ } else {
+ state=NOT_CONTEXTUAL;
+ paraDir=0;
+ }
+ /* count paragraphs and determine the paragraph level (P2..P3) */
+ /*
+ * see comment in ubidi.h:
+ * the DEFAULT_XXX values are designed so that
+ * their bit 0 alone yields the intended default
+ */
+ for( /* i=0 above */ ; i<length; ) {
+ /* i is incremented by UTF_NEXT_CHAR */
i0=i; /* index of first code unit */
UTF_NEXT_CHAR(text, i, length, uchar);
i1=i-1; /* index of last code unit, gets the directional property */
- flags|=DIRPROP_FLAG(dirProps[i1]=dirProp=u_charDirection(uchar));
+ flags|=DIRPROP_FLAG(dirProp=ubidi_getCustomizedClass(pBiDi, uchar));
+ dirProps[i1]=dirProp|paraDir;
if(i1>i0) { /* set previous code units' properties to BN */
flags|=DIRPROP_FLAG(BN);
do {
- dirProps[--i1]=BN;
+ dirProps[--i1]=BN|paraDir;
} while(i1>i0);
}
+ if(state==LOOKING_FOR_STRONG) {
+ if(dirProp==L) {
+ state=FOUND_STRONG_CHAR;
+ if(paraDir) {
+ paraDir=0;
+ for(i1=paraStart; i1<i; i1++) {
+ dirProps[i1]&=~CONTEXT_RTL;
+ }
+ }
+ continue;
+ }
+ if(dirProp==R || dirProp==AL) {
+ state=FOUND_STRONG_CHAR;
+ if(paraDir==0) {
+ paraDir=CONTEXT_RTL;
+ for(i1=paraStart; i1<i; i1++) {
+ dirProps[i1]|=CONTEXT_RTL;
+ }
+ }
+ continue;
+ }
+ }
+ if(dirProp==L) {
+ lastStrongDir=0;
+ lastStrongLTR=i; /* i is index to next character */
+ }
+ else if(dirProp==R) {
+ lastStrongDir=CONTEXT_RTL;
+ }
+ else if(dirProp==AL) {
+ lastStrongDir=CONTEXT_RTL;
+ lastArabicPos=i-1;
+ }
+ else if(dirProp==B) {
+ if(pBiDi->reorderingOptions & UBIDI_OPTION_STREAMING) {
+ pBiDi->length=i; /* i is index to next character */
+ }
+ if(isDefaultLevelInverse && (lastStrongDir==CONTEXT_RTL) &&(paraDir!=lastStrongDir)) {
+ for( ; paraStart<i; paraStart++) {
+ dirProps[paraStart]|=CONTEXT_RTL;
+ }
+ }
+ if(i<length) { /* B not last char in text */
+ if(!((uchar==CR) && (text[i]==LF))) {
+ pBiDi->paraCount++;
+ }
+ if(isDefaultLevel) {
+ state=LOOKING_FOR_STRONG;
+ paraStart=i; /* i is index to next character */
+ paraDir=paraDirDefault;
+ lastStrongDir=paraDirDefault;
+ }
+ }
+ }
+ if(removeBiDiControls && IS_BIDI_CONTROL_CHAR(uchar)) {
+ controlCount++;
+ }
}
- if(flags&MASK_EMBEDDING) {
- flags|=DIRPROP_FLAG_LR(pBiDi->paraLevel);
+ if(isDefaultLevelInverse && (lastStrongDir==CONTEXT_RTL) &&(paraDir!=lastStrongDir)) {
+ for(i1=paraStart; i1<length; i1++) {
+ dirProps[i1]|=CONTEXT_RTL;
+ }
+ }
+ if(isDefaultLevel) {
+ pBiDi->paraLevel=GET_PARALEVEL(pBiDi, 0);
+ }
+ if(pBiDi->reorderingOptions & UBIDI_OPTION_STREAMING) {
+ if((lastStrongLTR>pBiDi->length) &&
+ (GET_PARALEVEL(pBiDi, lastStrongLTR)==0)) {
+ pBiDi->length = lastStrongLTR;
+ }
+ if(pBiDi->length<pBiDi->originalLength) {
+ pBiDi->paraCount--;
+ }
}
+ /* The following line does nothing new for contextual paraLevel, but is
+ needed for absolute paraLevel. */
+ flags|=DIRPROP_FLAG_LR(pBiDi->paraLevel);
+ if(pBiDi->orderParagraphsLTR && (flags&DIRPROP_FLAG(B))) {
+ flags|=DIRPROP_FLAG(L);
+ }
+
+ pBiDi->controlCount = controlCount;
pBiDi->flags=flags;
+ pBiDi->lastArabicPos=lastArabicPos;
}
/* perform (X1)..(X9) ------------------------------------------------------- */
+/* determine if the text is mixed-directional or single-directional */
+static UBiDiDirection
+directionFromFlags(UBiDi *pBiDi) {
+ Flags flags=pBiDi->flags;
+ /* if the text contains AN and neutrals, then some neutrals may become RTL */
+ if(!(flags&MASK_RTL || ((flags&DIRPROP_FLAG(AN)) && (flags&MASK_POSSIBLE_N)))) {
+ return UBIDI_LTR;
+ } else if(!(flags&MASK_LTR)) {
+ return UBIDI_RTL;
+ } else {
+ return UBIDI_MIXED;
+ }
+}
+
/*
* Resolve the explicit levels as specified by explicit embedding codes.
* Recalculate the flags to have them reflect the real properties
*
* This implementation assumes that UBIDI_MAX_EXPLICIT_LEVEL is odd.
*/
-
static UBiDiDirection
resolveExplicitLevels(UBiDi *pBiDi) {
const DirProp *dirProps=pBiDi->dirProps;
UBiDiLevel *levels=pBiDi->levels;
-
+ const UChar *text=pBiDi->text;
+
int32_t i=0, length=pBiDi->length;
Flags flags=pBiDi->flags; /* collect all directionalities in the text */
DirProp dirProp;
- UBiDiLevel level=pBiDi->paraLevel;
+ UBiDiLevel level=GET_PARALEVEL(pBiDi, 0);
UBiDiDirection direction;
+ int32_t paraIndex=0;
/* determine if the text is mixed-directional or single-directional */
- direction=directionFromFlags(flags);
+ direction=directionFromFlags(pBiDi);
- /* we may not need to resolve any explicit levels */
- if(direction!=UBIDI_MIXED) {
+ /* we may not need to resolve any explicit levels, but for multiple
+ paragraphs we want to loop on all chars to set the para boundaries */
+ if((direction!=UBIDI_MIXED) && (pBiDi->paraCount==1)) {
/* not mixed directionality: levels don't matter - trailingWSStart will be 0 */
- } else if(!(flags&MASK_EXPLICIT) || pBiDi->isInverse) {
+ } else if((pBiDi->paraCount==1) &&
+ (!(flags&MASK_EXPLICIT) ||
+ (pBiDi->reorderingMode > UBIDI_REORDER_LAST_LOGICAL_TO_VISUAL))) {
/* mixed, but all characters are at the same embedding level */
/* or we are in "inverse BiDi" */
+ /* and we don't have contextual multiple paragraphs with some B char */
/* set all levels to the paragraph level */
for(i=0; i<length; ++i) {
levels[i]=level;
/* recalculate the flags */
flags=0;
- /* since we assume that this is a single paragraph, we ignore (X8) */
for(i=0; i<length; ++i) {
- dirProp=dirProps[i];
+ dirProp=NO_CONTEXT_RTL(dirProps[i]);
switch(dirProp) {
case LRE:
case LRO:
embeddingLevel=newLevel;
if(dirProp==LRO) {
embeddingLevel|=UBIDI_LEVEL_OVERRIDE;
- } else {
- embeddingLevel&=~UBIDI_LEVEL_OVERRIDE;
}
+ /* we don't need to set UBIDI_LEVEL_OVERRIDE off for LRE
+ since this has already been done for newLevel which is
+ the source for embeddingLevel.
+ */
} else if((embeddingLevel&~UBIDI_LEVEL_OVERRIDE)==UBIDI_MAX_EXPLICIT_LEVEL) {
++countOver61;
} else /* (embeddingLevel&~UBIDI_LEVEL_OVERRIDE)==UBIDI_MAX_EXPLICIT_LEVEL-1 */ {
embeddingLevel=newLevel;
if(dirProp==RLO) {
embeddingLevel|=UBIDI_LEVEL_OVERRIDE;
- } else {
- embeddingLevel&=~UBIDI_LEVEL_OVERRIDE;
}
+ /* we don't need to set UBIDI_LEVEL_OVERRIDE off for RLE
+ since this has already been done for newLevel which is
+ the source for embeddingLevel.
+ */
} else {
++countOver61;
}
flags|=DIRPROP_FLAG(BN);
break;
case B:
- /*
- * We do not really expect to see a paragraph separator (B),
- * but we should do something reasonable with it,
- * especially at the end of the text.
- */
stackTop=0;
countOver60=countOver61=0;
- embeddingLevel=level=pBiDi->paraLevel;
+ level=GET_PARALEVEL(pBiDi, i);
+ if((i+1)<length) {
+ embeddingLevel=GET_PARALEVEL(pBiDi, i+1);
+ if(!((text[i]==CR) && (text[i+1]==LF))) {
+ pBiDi->paras[paraIndex++]=i+1;
+ }
+ }
flags|=DIRPROP_FLAG(B);
break;
case BN:
if(flags&MASK_EMBEDDING) {
flags|=DIRPROP_FLAG_LR(pBiDi->paraLevel);
}
+ if(pBiDi->orderParagraphsLTR && (flags&DIRPROP_FLAG(B))) {
+ flags|=DIRPROP_FLAG(L);
+ }
/* subsequently, ignore the explicit codes and BN (X9) */
/* again, determine if the text is mixed-directional or single-directional */
pBiDi->flags=flags;
- direction=directionFromFlags(flags);
+ direction=directionFromFlags(pBiDi);
}
+
return direction;
}
static UBiDiDirection
checkExplicitLevels(UBiDi *pBiDi, UErrorCode *pErrorCode) {
const DirProp *dirProps=pBiDi->dirProps;
+ DirProp dirProp;
UBiDiLevel *levels=pBiDi->levels;
-
+ const UChar *text=pBiDi->text;
+
int32_t i, length=pBiDi->length;
Flags flags=0; /* collect all directionalities in the text */
- UBiDiLevel level, paraLevel=pBiDi->paraLevel;
+ UBiDiLevel level;
+ uint32_t paraIndex=0;
for(i=0; i<length; ++i) {
level=levels[i];
+ dirProp=NO_CONTEXT_RTL(dirProps[i]);
if(level&UBIDI_LEVEL_OVERRIDE) {
/* keep the override flag in levels[i] but adjust the flags */
level&=~UBIDI_LEVEL_OVERRIDE; /* make the range check below simpler */
flags|=DIRPROP_FLAG_O(level);
} else {
/* set the flags */
- flags|=DIRPROP_FLAG_E(level)|DIRPROP_FLAG(dirProps[i]);
+ flags|=DIRPROP_FLAG_E(level)|DIRPROP_FLAG(dirProp);
}
- if(level<paraLevel || UBIDI_MAX_EXPLICIT_LEVEL<level) {
+ if((level<GET_PARALEVEL(pBiDi, i) &&
+ !((0==level)&&(dirProp==B))) ||
+ (UBIDI_MAX_EXPLICIT_LEVEL<level)) {
/* level out of bounds */
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return UBIDI_LTR;
}
+ if((dirProp==B) && ((i+1)<length)) {
+ if(!((text[i]==CR) && (text[i+1]==LF))) {
+ pBiDi->paras[paraIndex++]=i+1;
+ }
+ }
}
if(flags&MASK_EMBEDDING) {
flags|=DIRPROP_FLAG_LR(pBiDi->paraLevel);
/* determine if the text is mixed-directional or single-directional */
pBiDi->flags=flags;
- return directionFromFlags(flags);
+ return directionFromFlags(pBiDi);
}
-/* determine if the text is mixed-directional or single-directional */
-static UBiDiDirection
-directionFromFlags(Flags flags) {
- /* if the text contains AN and neutrals, then some neutrals may become RTL */
- if(!(flags&MASK_RTL || ((flags&DIRPROP_FLAG(AN)) && (flags&MASK_POSSIBLE_N)))) {
- return UBIDI_LTR;
- } else if(!(flags&MASK_LTR)) {
- return UBIDI_RTL;
- } else {
- return UBIDI_MIXED;
+/*********************************************************************/
+/* The Properties state machine table */
+/*********************************************************************/
+/* */
+/* All table cells are 8 bits: */
+/* bits 0..4: next state */
+/* bits 5..7: action to perform (if > 0) */
+/* */
+/* Cells may be of format "n" where n represents the next state */
+/* (except for the rightmost column). */
+/* Cells may also be of format "_(x,y)" where x represents an action */
+/* to perform and y represents the next state. */
+/* */
+/*********************************************************************/
+/* Definitions and type for properties state table */
+/*********************************************************************/
+#define IMPTABPROPS_COLUMNS 14
+#define IMPTABPROPS_RES (IMPTABPROPS_COLUMNS - 1)
+#define GET_STATEPROPS(cell) ((cell)&0x1f)
+#define GET_ACTIONPROPS(cell) ((cell)>>5)
+#define _(action, newState) ((uint8_t)(newState+(action<<5)))
+
+static const uint8_t groupProp[] = /* dirProp regrouped */
+{
+/* L R EN ES ET AN CS B S WS ON LRE LRO AL RLE RLO PDF NSM BN */
+ 0, 1, 2, 7, 8, 3, 9, 6, 5, 4, 4, 10, 10, 12, 10, 10, 10, 11, 10
+};
+enum { _L=0, _R=1, _EN=2, _AN=3, _ON=4, _S=5, _B=6 }; /* reduced dirProp */
+
+/*********************************************************************/
+/* */
+/* PROPERTIES STATE TABLE */
+/* */
+/* In table impTabProps, */
+/* - the ON column regroups ON and WS */
+/* - the BN column regroups BN, LRE, RLE, LRO, RLO, PDF */
+/* - the Res column is the reduced property assigned to a run */
+/* */
+/* Action 1: process current run1, init new run1 */
+/* 2: init new run2 */
+/* 3: process run1, process run2, init new run1 */
+/* 4: process run1, set run1=run2, init new run2 */
+/* */
+/* Notes: */
+/* 1) This table is used in resolveImplicitLevels(). */
+/* 2) This table triggers actions when there is a change in the Bidi*/
+/* property of incoming characters (action 1). */
+/* 3) Most such property sequences are processed immediately (in */
+/* fact, passed to processPropertySeq(). */
+/* 4) However, numbers are assembled as one sequence. This means */
+/* that undefined situations (like CS following digits, until */
+/* it is known if the next char will be a digit) are held until */
+/* following chars define them. */
+/* Example: digits followed by CS, then comes another CS or ON; */
+/* the digits will be processed, then the CS assigned */
+/* as the start of an ON sequence (action 3). */
+/* 5) There are cases where more than one sequence must be */
+/* processed, for instance digits followed by CS followed by L: */
+/* the digits must be processed as one sequence, and the CS */
+/* must be processed as an ON sequence, all this before starting */
+/* assembling chars for the opening L sequence. */
+/* */
+/* */
+static const uint8_t impTabProps[][IMPTABPROPS_COLUMNS] =
+{
+/* L , R , EN , AN , ON , S , B , ES , ET , CS , BN , NSM , AL , Res */
+/* 0 Init */ { 1 , 2 , 4 , 5 , 7 , 15 , 17 , 7 , 9 , 7 , 0 , 7 , 3 , _ON },
+/* 1 L */ { 1 , _(1,2), _(1,4), _(1,5), _(1,7),_(1,15),_(1,17), _(1,7), _(1,9), _(1,7), 1 , 1 , _(1,3), _L },
+/* 2 R */ { _(1,1), 2 , _(1,4), _(1,5), _(1,7),_(1,15),_(1,17), _(1,7), _(1,9), _(1,7), 2 , 2 , _(1,3), _R },
+/* 3 AL */ { _(1,1), _(1,2), _(1,6), _(1,6), _(1,8),_(1,16),_(1,17), _(1,8), _(1,8), _(1,8), 3 , 3 , 3 , _R },
+/* 4 EN */ { _(1,1), _(1,2), 4 , _(1,5), _(1,7),_(1,15),_(1,17),_(2,10), 11 ,_(2,10), 4 , 4 , _(1,3), _EN },
+/* 5 AN */ { _(1,1), _(1,2), _(1,4), 5 , _(1,7),_(1,15),_(1,17), _(1,7), _(1,9),_(2,12), 5 , 5 , _(1,3), _AN },
+/* 6 AL:EN/AN */ { _(1,1), _(1,2), 6 , 6 , _(1,8),_(1,16),_(1,17), _(1,8), _(1,8),_(2,13), 6 , 6 , _(1,3), _AN },
+/* 7 ON */ { _(1,1), _(1,2), _(1,4), _(1,5), 7 ,_(1,15),_(1,17), 7 ,_(2,14), 7 , 7 , 7 , _(1,3), _ON },
+/* 8 AL:ON */ { _(1,1), _(1,2), _(1,6), _(1,6), 8 ,_(1,16),_(1,17), 8 , 8 , 8 , 8 , 8 , _(1,3), _ON },
+/* 9 ET */ { _(1,1), _(1,2), 4 , _(1,5), 7 ,_(1,15),_(1,17), 7 , 9 , 7 , 9 , 9 , _(1,3), _ON },
+/*10 EN+ES/CS */ { _(3,1), _(3,2), 4 , _(3,5), _(4,7),_(3,15),_(3,17), _(4,7),_(4,14), _(4,7), 10 , _(4,7), _(3,3), _EN },
+/*11 EN+ET */ { _(1,1), _(1,2), 4 , _(1,5), _(1,7),_(1,15),_(1,17), _(1,7), 11 , _(1,7), 11 , 11 , _(1,3), _EN },
+/*12 AN+CS */ { _(3,1), _(3,2), _(3,4), 5 , _(4,7),_(3,15),_(3,17), _(4,7),_(4,14), _(4,7), 12 , _(4,7), _(3,3), _AN },
+/*13 AL:EN/AN+CS */ { _(3,1), _(3,2), 6 , 6 , _(4,8),_(3,16),_(3,17), _(4,8), _(4,8), _(4,8), 13 , _(4,8), _(3,3), _AN },
+/*14 ON+ET */ { _(1,1), _(1,2), _(4,4), _(1,5), 7 ,_(1,15),_(1,17), 7 , 14 , 7 , 14 , 14 , _(1,3), _ON },
+/*15 S */ { _(1,1), _(1,2), _(1,4), _(1,5), _(1,7), 15 ,_(1,17), _(1,7), _(1,9), _(1,7), 15 , _(1,7), _(1,3), _S },
+/*16 AL:S */ { _(1,1), _(1,2), _(1,6), _(1,6), _(1,8), 16 ,_(1,17), _(1,8), _(1,8), _(1,8), 16 , _(1,8), _(1,3), _S },
+/*17 B */ { _(1,1), _(1,2), _(1,4), _(1,5), _(1,7),_(1,15), 17 , _(1,7), _(1,9), _(1,7), 17 , _(1,7), _(1,3), _B }
+};
+
+/* we must undef macro _ because the levels table have a different
+ * structure (4 bits for action and 4 bits for next state.
+ */
+#undef _
+
+/*********************************************************************/
+/* The levels state machine tables */
+/*********************************************************************/
+/* */
+/* All table cells are 8 bits: */
+/* bits 0..3: next state */
+/* bits 4..7: action to perform (if > 0) */
+/* */
+/* Cells may be of format "n" where n represents the next state */
+/* (except for the rightmost column). */
+/* Cells may also be of format "_(x,y)" where x represents an action */
+/* to perform and y represents the next state. */
+/* */
+/* This format limits each table to 16 states each and to 15 actions.*/
+/* */
+/*********************************************************************/
+/* Definitions and type for levels state tables */
+/*********************************************************************/
+#define IMPTABLEVELS_COLUMNS (_B + 2)
+#define IMPTABLEVELS_RES (IMPTABLEVELS_COLUMNS - 1)
+#define GET_STATE(cell) ((cell)&0x0f)
+#define GET_ACTION(cell) ((cell)>>4)
+#define _(action, newState) ((uint8_t)(newState+(action<<4)))
+
+typedef uint8_t ImpTab[][IMPTABLEVELS_COLUMNS];
+typedef uint8_t ImpAct[];
+
+/* FOOD FOR THOUGHT: each ImpTab should have its associated ImpAct,
+ * instead of having a pair of ImpTab and a pair of ImpAct.
+ */
+typedef struct ImpTabPair {
+ ImpTab * pImpTab[2];
+ ImpAct * pImpAct[2];
+} ImpTabPair;
+
+/*********************************************************************/
+/* */
+/* LEVELS STATE TABLES */
+/* */
+/* In all levels state tables, */
+/* - state 0 is the initial state */
+/* - the Res column is the increment to add to the text level */
+/* for this property sequence. */
+/* */
+/* The impAct arrays for each table of a pair map the local action */
+/* numbers of the table to the total list of actions. For instance, */
+/* action 2 in a given table corresponds to the action number which */
+/* appears in entry [2] of the impAct array for that table. */
+/* The first entry of all impAct arrays must be 0. */
+/* */
+/* Action 1: init conditional sequence */
+/* 2: prepend conditional sequence to current sequence */
+/* 3: set ON sequence to new level - 1 */
+/* 4: init EN/AN/ON sequence */
+/* 5: fix EN/AN/ON sequence followed by R */
+/* 6: set previous level sequence to level 2 */
+/* */
+/* Notes: */
+/* 1) These tables are used in processPropertySeq(). The input */
+/* is property sequences as determined by resolveImplicitLevels. */
+/* 2) Most such property sequences are processed immediately */
+/* (levels are assigned). */
+/* 3) However, some sequences cannot be assigned a final level till */
+/* one or more following sequences are received. For instance, */
+/* ON following an R sequence within an even-level paragraph. */
+/* If the following sequence is R, the ON sequence will be */
+/* assigned basic run level+1, and so will the R sequence. */
+/* 4) S is generally handled like ON, since its level will be fixed */
+/* to paragraph level in adjustWSLevels(). */
+/* */
+
+static const ImpTab impTabL_DEFAULT = /* Even paragraph level */
+/* In this table, conditional sequences receive the higher possible level
+ until proven otherwise.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 0 , 1 , 0 , 2 , 0 , 0 , 0 , 0 },
+/* 1 : R */ { 0 , 1 , 3 , 3 , _(1,4), _(1,4), 0 , 1 },
+/* 2 : AN */ { 0 , 1 , 0 , 2 , _(1,5), _(1,5), 0 , 2 },
+/* 3 : R+EN/AN */ { 0 , 1 , 3 , 3 , _(1,4), _(1,4), 0 , 2 },
+/* 4 : R+ON */ { _(2,0), 1 , 3 , 3 , 4 , 4 , _(2,0), 1 },
+/* 5 : AN+ON */ { _(2,0), 1 , _(2,0), 2 , 5 , 5 , _(2,0), 1 }
+};
+static const ImpTab impTabR_DEFAULT = /* Odd paragraph level */
+/* In this table, conditional sequences receive the lower possible level
+ until proven otherwise.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 1 , 0 , 2 , 2 , 0 , 0 , 0 , 0 },
+/* 1 : L */ { 1 , 0 , 1 , 3 , _(1,4), _(1,4), 0 , 1 },
+/* 2 : EN/AN */ { 1 , 0 , 2 , 2 , 0 , 0 , 0 , 1 },
+/* 3 : L+AN */ { 1 , 0 , 1 , 3 , 5 , 5 , 0 , 1 },
+/* 4 : L+ON */ { _(2,1), 0 , _(2,1), 3 , 4 , 4 , 0 , 0 },
+/* 5 : L+AN+ON */ { 1 , 0 , 1 , 3 , 5 , 5 , 0 , 0 }
+};
+static const ImpAct impAct0 = {0,1,2,3,4,5,6};
+static const ImpTabPair impTab_DEFAULT = {{(ImpTab*)&impTabL_DEFAULT,
+ (ImpTab*)&impTabR_DEFAULT},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct0}};
+
+static const ImpTab impTabL_NUMBERS_SPECIAL = /* Even paragraph level */
+/* In this table, conditional sequences receive the higher possible level
+ until proven otherwise.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 0 , 2 , 1 , 1 , 0 , 0 , 0 , 0 },
+/* 1 : L+EN/AN */ { 0 , 2 , 1 , 1 , 0 , 0 , 0 , 2 },
+/* 2 : R */ { 0 , 2 , 4 , 4 , _(1,3), 0 , 0 , 1 },
+/* 3 : R+ON */ { _(2,0), 2 , 4 , 4 , 3 , 3 , _(2,0), 1 },
+/* 4 : R+EN/AN */ { 0 , 2 , 4 , 4 , _(1,3), _(1,3), 0 , 2 }
+ };
+static const ImpTabPair impTab_NUMBERS_SPECIAL = {{(ImpTab*)&impTabL_NUMBERS_SPECIAL,
+ (ImpTab*)&impTabR_DEFAULT},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct0}};
+
+static const ImpTab impTabL_GROUP_NUMBERS_WITH_R =
+/* In this table, EN/AN+ON sequences receive levels as if associated with R
+ until proven that there is L or sor/eor on both sides. AN is handled like EN.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 init */ { 0 , 3 , _(1,1), _(1,1), 0 , 0 , 0 , 0 },
+/* 1 EN/AN */ { _(2,0), 3 , 1 , 1 , 2 , _(2,0), _(2,0), 2 },
+/* 2 EN/AN+ON */ { _(2,0), 3 , 1 , 1 , 2 , _(2,0), _(2,0), 1 },
+/* 3 R */ { 0 , 3 , 5 , 5 , _(1,4), 0 , 0 , 1 },
+/* 4 R+ON */ { _(2,0), 3 , 5 , 5 , 4 , _(2,0), _(2,0), 1 },
+/* 5 R+EN/AN */ { 0 , 3 , 5 , 5 , _(1,4), 0 , 0 , 2 }
+};
+static const ImpTab impTabR_GROUP_NUMBERS_WITH_R =
+/* In this table, EN/AN+ON sequences receive levels as if associated with R
+ until proven that there is L on both sides. AN is handled like EN.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 init */ { 2 , 0 , 1 , 1 , 0 , 0 , 0 , 0 },
+/* 1 EN/AN */ { 2 , 0 , 1 , 1 , 0 , 0 , 0 , 1 },
+/* 2 L */ { 2 , 0 , _(1,4), _(1,4), _(1,3), 0 , 0 , 1 },
+/* 3 L+ON */ { _(2,2), 0 , 4 , 4 , 3 , 0 , 0 , 0 },
+/* 4 L+EN/AN */ { _(2,2), 0 , 4 , 4 , 3 , 0 , 0 , 1 }
+};
+static const ImpTabPair impTab_GROUP_NUMBERS_WITH_R = {
+ {(ImpTab*)&impTabL_GROUP_NUMBERS_WITH_R,
+ (ImpTab*)&impTabR_GROUP_NUMBERS_WITH_R},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct0}};
+
+
+static const ImpTab impTabL_INVERSE_NUMBERS_AS_L =
+/* This table is identical to the Default LTR table except that EN and AN are
+ handled like L.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 0 , 1 , 0 , 0 , 0 , 0 , 0 , 0 },
+/* 1 : R */ { 0 , 1 , 0 , 0 , _(1,4), _(1,4), 0 , 1 },
+/* 2 : AN */ { 0 , 1 , 0 , 0 , _(1,5), _(1,5), 0 , 2 },
+/* 3 : R+EN/AN */ { 0 , 1 , 0 , 0 , _(1,4), _(1,4), 0 , 2 },
+/* 4 : R+ON */ { _(2,0), 1 , _(2,0), _(2,0), 4 , 4 , _(2,0), 1 },
+/* 5 : AN+ON */ { _(2,0), 1 , _(2,0), _(2,0), 5 , 5 , _(2,0), 1 }
+};
+static const ImpTab impTabR_INVERSE_NUMBERS_AS_L =
+/* This table is identical to the Default RTL table except that EN and AN are
+ handled like L.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 1 , 0 , 1 , 1 , 0 , 0 , 0 , 0 },
+/* 1 : L */ { 1 , 0 , 1 , 1 , _(1,4), _(1,4), 0 , 1 },
+/* 2 : EN/AN */ { 1 , 0 , 1 , 1 , 0 , 0 , 0 , 1 },
+/* 3 : L+AN */ { 1 , 0 , 1 , 1 , 5 , 5 , 0 , 1 },
+/* 4 : L+ON */ { _(2,1), 0 , _(2,1), _(2,1), 4 , 4 , 0 , 0 },
+/* 5 : L+AN+ON */ { 1 , 0 , 1 , 1 , 5 , 5 , 0 , 0 }
+};
+static const ImpTabPair impTab_INVERSE_NUMBERS_AS_L = {
+ {(ImpTab*)&impTabL_INVERSE_NUMBERS_AS_L,
+ (ImpTab*)&impTabR_INVERSE_NUMBERS_AS_L},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct0}};
+
+static const ImpTab impTabR_INVERSE_LIKE_DIRECT = /* Odd paragraph level */
+/* In this table, conditional sequences receive the lower possible level
+ until proven otherwise.
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 1 , 0 , 2 , 2 , 0 , 0 , 0 , 0 },
+/* 1 : L */ { 1 , 0 , 1 , 2 , _(1,3), _(1,3), 0 , 1 },
+/* 2 : EN/AN */ { 1 , 0 , 2 , 2 , 0 , 0 , 0 , 1 },
+/* 3 : L+ON */ { _(2,1), _(3,0), 6 , 4 , 3 , 3 , _(3,0), 0 },
+/* 4 : L+ON+AN */ { _(2,1), _(3,0), 6 , 4 , 5 , 5 , _(3,0), 3 },
+/* 5 : L+AN+ON */ { _(2,1), _(3,0), 6 , 4 , 5 , 5 , _(3,0), 2 },
+/* 6 : L+ON+EN */ { _(2,1), _(3,0), 6 , 4 , 3 , 3 , _(3,0), 1 }
+};
+static const ImpAct impAct1 = {0,1,11,12};
+/* FOOD FOR THOUGHT: in LTR table below, check case "JKL 123abc"
+ */
+static const ImpTabPair impTab_INVERSE_LIKE_DIRECT = {
+ {(ImpTab*)&impTabL_DEFAULT,
+ (ImpTab*)&impTabR_INVERSE_LIKE_DIRECT},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct1}};
+
+static const ImpTab impTabL_INVERSE_LIKE_DIRECT_WITH_MARKS =
+/* The case handled in this table is (visually): R EN L
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 0 , _(6,3), 0 , 1 , 0 , 0 , 0 , 0 },
+/* 1 : L+AN */ { 0 , _(6,3), 0 , 1 , _(1,2), _(3,0), 0 , 4 },
+/* 2 : L+AN+ON */ { _(2,0), _(6,3), _(2,0), 1 , 2 , _(3,0), _(2,0), 3 },
+/* 3 : R */ { 0 , _(6,3), _(5,5), _(5,6), _(1,4), _(3,0), 0 , 3 },
+/* 4 : R+ON */ { _(3,0), _(4,3), _(5,5), _(5,6), 4 , _(3,0), _(3,0), 3 },
+/* 5 : R+EN */ { _(3,0), _(4,3), 5 , _(5,6), _(1,4), _(3,0), _(3,0), 4 },
+/* 6 : R+AN */ { _(3,0), _(4,3), _(5,5), 6 , _(1,4), _(3,0), _(3,0), 4 }
+};
+static const ImpTab impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS =
+/* The cases handled in this table are (visually): R EN L
+ R L AN L
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { _(1,3), 0 , 1 , 1 , 0 , 0 , 0 , 0 },
+/* 1 : R+EN/AN */ { _(2,3), 0 , 1 , 1 , 2 , _(4,0), 0 , 1 },
+/* 2 : R+EN/AN+ON */ { _(2,3), 0 , 1 , 1 , 2 , _(4,0), 0 , 0 },
+/* 3 : L */ { 3 , 0 , 3 , _(3,6), _(1,4), _(4,0), 0 , 1 },
+/* 4 : L+ON */ { _(5,3), _(4,0), 5 , _(3,6), 4 , _(4,0), _(4,0), 0 },
+/* 5 : L+ON+EN */ { _(5,3), _(4,0), 5 , _(3,6), 4 , _(4,0), _(4,0), 1 },
+/* 6 : L+AN */ { _(5,3), _(4,0), 6 , 6 , 4 , _(4,0), _(4,0), 3 }
+};
+static const ImpAct impAct2 = {0,1,7,8,9,10};
+static const ImpTabPair impTab_INVERSE_LIKE_DIRECT_WITH_MARKS = {
+ {(ImpTab*)&impTabL_INVERSE_LIKE_DIRECT_WITH_MARKS,
+ (ImpTab*)&impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct2}};
+
+static const ImpTabPair impTab_INVERSE_FOR_NUMBERS_SPECIAL = {
+ {(ImpTab*)&impTabL_NUMBERS_SPECIAL,
+ (ImpTab*)&impTabR_INVERSE_LIKE_DIRECT},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct1}};
+
+static const ImpTab impTabL_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS =
+/* The case handled in this table is (visually): R EN L
+*/
+{
+/* L , R , EN , AN , ON , S , B , Res */
+/* 0 : init */ { 0 , _(6,2), 1 , 1 , 0 , 0 , 0 , 0 },
+/* 1 : L+EN/AN */ { 0 , _(6,2), 1 , 1 , 0 , _(3,0), 0 , 4 },
+/* 2 : R */ { 0 , _(6,2), _(5,4), _(5,4), _(1,3), _(3,0), 0 , 3 },
+/* 3 : R+ON */ { _(3,0), _(4,2), _(5,4), _(5,4), 3 , _(3,0), _(3,0), 3 },
+/* 4 : R+EN/AN */ { _(3,0), _(4,2), 4 , 4 , _(1,3), _(3,0), _(3,0), 4 }
+};
+static const ImpTabPair impTab_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS = {
+ {(ImpTab*)&impTabL_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS,
+ (ImpTab*)&impTabR_INVERSE_LIKE_DIRECT_WITH_MARKS},
+ {(ImpAct*)&impAct0, (ImpAct*)&impAct2}};
+
+#undef _
+
+typedef struct {
+ ImpTab * pImpTab; /* level table pointer */
+ ImpAct * pImpAct; /* action map array */
+ int32_t startON; /* start of ON sequence */
+ int32_t startL2EN; /* start of level 2 sequence */
+ int32_t lastStrongRTL; /* index of last found R or AL */
+ int32_t state; /* current state */
+ UBiDiLevel runLevel; /* run level before implicit solving */
+} LevState;
+
+/*------------------------------------------------------------------------*/
+
+static void
+addPoint(UBiDi *pBiDi, int32_t pos, int32_t flag)
+ /* param pos: position where to insert
+ param flag: one of LRM_BEFORE, LRM_AFTER, RLM_BEFORE, RLM_AFTER
+ */
+{
+#define FIRSTALLOC 10
+ Point point;
+ InsertPoints * pInsertPoints=&(pBiDi->insertPoints);
+
+ if (pInsertPoints->capacity == 0)
+ {
+ pInsertPoints->points=uprv_malloc(sizeof(Point)*FIRSTALLOC);
+ if (pInsertPoints->points == NULL)
+ {
+ pInsertPoints->errorCode=U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ pInsertPoints->capacity=FIRSTALLOC;
}
+ if (pInsertPoints->size >= pInsertPoints->capacity) /* no room for new point */
+ {
+ void * savePoints=pInsertPoints->points;
+ pInsertPoints->points=uprv_realloc(pInsertPoints->points,
+ pInsertPoints->capacity*2*sizeof(Point));
+ if (pInsertPoints->points == NULL)
+ {
+ pInsertPoints->points=savePoints;
+ pInsertPoints->errorCode=U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ else pInsertPoints->capacity*=2;
+ }
+ point.pos=pos;
+ point.flag=flag;
+ pInsertPoints->points[pInsertPoints->size]=point;
+ pInsertPoints->size++;
+#undef FIRSTALLOC
}
/* perform rules (Wn), (Nn), and (In) on a run of the text ------------------ */
* (except for W5: sequences of ET) and keeps track of changes
* in a rule Wp that affect a later Wq (p<q).
*
- * historyOfEN is a variable-saver: it contains 4 boolean states;
- * a bit in it set to 1 means:
- * bit 0: the current code is an EN after W2
- * bit 1: the current code is an EN after W4
- * bit 2: the previous code was an EN after W2
- * bit 3: the previous code was an EN after W4
- * In other words, b0..1 have transitions of EN in the current iteration,
- * while b2..3 have the transitions of EN in the previous iteration.
- * A simple historyOfEN<<=2 suffices for the propagation.
- *
* The (Nn) and (In) rules are also performed in that same single loop,
* but effectively one iteration behind for white space.
*
* to actually store the intermediate directional properties in dirProps[].
*/
-#define EN_SHIFT 2
-#define EN_AFTER_W2 1
-#define EN_AFTER_W4 2
-#define EN_ALL 3
-#define PREV_EN_AFTER_W2 4
-#define PREV_EN_AFTER_W4 8
-
static void
-resolveImplicitLevels(UBiDi *pBiDi,
- int32_t start, int32_t limit,
- DirProp sor, DirProp eor) {
- const DirProp *dirProps=pBiDi->dirProps;
- UBiDiLevel *levels=pBiDi->levels;
-
- int32_t i, next, neutralStart=-1;
- DirProp prevDirProp, dirProp, nextDirProp, lastStrong, beforeNeutral=L;
- UBiDiLevel numberLevel;
- uint8_t historyOfEN;
-
- /* initialize: current at sor, next at start (it is start<limit) */
- next=start;
- dirProp=lastStrong=sor;
- nextDirProp=dirProps[next];
- historyOfEN=0;
-
- if(pBiDi->isInverse) {
- /*
- * For "inverse BiDi", we set the levels of numbers just like for
- * regular L characters, plus a flag that ubidi_getRuns() will use
- * to set a similar flag on the corresponding output run.
- */
- numberLevel=levels[start];
- if(numberLevel&1) {
- ++numberLevel;
- }
- } else {
- /* normal BiDi: least greater even level */
- numberLevel=(UBiDiLevel)((levels[start]+2)&~1);
- }
-
- /*
- * In all steps of this implementation, BN and explicit embedding codes
- * must be treated as if they didn't exist (X9).
- * They will get levels set before a non-neutral character, and remain
- * undefined before a neutral one, but adjustWSLevels() will take care
- * of all of them.
- */
- while(DIRPROP_FLAG(nextDirProp)&MASK_BN_EXPLICIT) {
- if(++next<limit) {
- nextDirProp=dirProps[next];
- } else {
- nextDirProp=eor;
+processPropertySeq(UBiDi *pBiDi, LevState *pLevState, uint8_t _prop,
+ int32_t start, int32_t limit) {
+ uint8_t cell, oldStateSeq, actionSeq;
+ ImpTab * pImpTab=pLevState->pImpTab;
+ ImpAct * pImpAct=pLevState->pImpAct;
+ UBiDiLevel * levels=pBiDi->levels;
+ UBiDiLevel level, addLevel;
+ InsertPoints * pInsertPoints;
+ int32_t start0, k;
+
+ start0=start; /* save original start position */
+ oldStateSeq=pLevState->state;
+ cell=(*pImpTab)[oldStateSeq][_prop];
+ pLevState->state=GET_STATE(cell); /* isolate the new state */
+ actionSeq=(*pImpAct)[GET_ACTION(cell)]; /* isolate the action */
+ addLevel=(*pImpTab)[pLevState->state][IMPTABLEVELS_RES];
+
+ if(actionSeq) {
+ switch(actionSeq) {
+ case 1: /* init ON seq */
+ pLevState->startON=start0;
break;
- }
- }
- /*
- * Note: at the end of this file, there is a prototype
- * of a version of this function that uses a statetable
- * at the core of this state machine.
- * If you make changes to this state machine,
- * please update that prototype as well.
- */
+ case 2: /* prepend ON seq to current seq */
+ start=pLevState->startON;
+ break;
- /* loop for entire run */
- while(next<limit) {
- /* advance */
- prevDirProp=dirProp;
- dirProp=nextDirProp;
- i=next;
- do {
- if(++next<limit) {
- nextDirProp=dirProps[next];
- } else {
- nextDirProp=eor;
- break;
+ case 3: /* L or S after possible relevant EN/AN */
+ /* check if we had EN after R/AL */
+ if (pLevState->startL2EN >= 0) {
+ addPoint(pBiDi, pLevState->startL2EN, LRM_BEFORE);
}
- } while(DIRPROP_FLAG(nextDirProp)&MASK_BN_EXPLICIT);
- historyOfEN<<=EN_SHIFT;
-
- /* (W1..W7) */
- switch(dirProp) {
- case L:
- lastStrong=L;
- break;
- case R:
- lastStrong=R;
- break;
- case AL:
- /* (W3) */
- lastStrong=AL;
- dirProp=R;
- break;
- case EN:
- /* we have to set historyOfEN correctly */
- if(lastStrong==AL) {
- /* (W2) */
- dirProp=AN;
- } else {
- if(lastStrong==L) {
- /* (W7) */
- dirProp=L;
+ pLevState->startL2EN=-1; /* not within previous if since could also be -2 */
+ /* check if we had any relevant EN/AN after R/AL */
+ pInsertPoints=&(pBiDi->insertPoints);
+ if ((pInsertPoints->capacity == 0) ||
+ (pInsertPoints->size <= pInsertPoints->confirmed))
+ {
+ /* nothing, just clean up */
+ pLevState->lastStrongRTL=-1;
+ /* check if we have a pending conditional segment */
+ level=(*pImpTab)[oldStateSeq][IMPTABLEVELS_RES];
+ if ((level & 1) && (pLevState->startON > 0)) { /* after ON */
+ start=pLevState->startON; /* reset to basic run level */
}
- /* this EN stays after (W2) and (W4) - at least before (W7) */
- historyOfEN|=EN_ALL;
- }
- break;
- case ES:
- if( historyOfEN&PREV_EN_AFTER_W2 && /* previous was EN before (W4) */
- nextDirProp==EN && lastStrong!=AL /* next is EN and (W2) won't make it AN */
- ) {
- /* (W4) */
- if(lastStrong!=L) {
- dirProp=EN;
- } else {
- /* (W7) */
- dirProp=L;
+ if (_prop == _S) /* add LRM before S */
+ {
+ addPoint(pBiDi, start0, LRM_BEFORE);
+ pInsertPoints->confirmed=pInsertPoints->size;
}
- historyOfEN|=EN_AFTER_W4;
- } else {
- /* (W6) */
- dirProp=ON;
+ break;
}
- break;
- case CS:
- if( historyOfEN&PREV_EN_AFTER_W2 && /* previous was EN before (W4) */
- nextDirProp==EN && lastStrong!=AL /* next is EN and (W2) won't make it AN */
- ) {
- /* (W4) */
- if(lastStrong!=L) {
- dirProp=EN;
- } else {
- /* (W7) */
- dirProp=L;
- }
- historyOfEN|=EN_AFTER_W4;
- } else if(prevDirProp==AN && /* previous was AN */
- (nextDirProp==AN || /* next is AN */
- (nextDirProp==EN && lastStrong==AL)) /* or (W2) will make it one */
- ) {
- /* (W4) */
- dirProp=AN;
- } else {
- /* (W6) */
- dirProp=ON;
+ /* reset previous RTL cont to level for LTR text */
+ for (k=pLevState->lastStrongRTL+1; k<start0; k++)
+ {
+ /* reset odd level, leave runLevel+2 as is */
+ levels[k]=(levels[k] - 2) & ~1;
}
- break;
- case ET:
- /* get sequence of ET; advance only next, not current, previous or historyOfEN */
- if(next<limit) {
- while(DIRPROP_FLAG(nextDirProp)&MASK_ET_NSM_BN /* (W1), (X9) */) {
- if(++next<limit) {
- nextDirProp=dirProps[next];
- } else {
- nextDirProp=eor;
- break;
- }
- }
+ /* mark insert points as confirmed */
+ pInsertPoints->confirmed=pInsertPoints->size;
+ pLevState->lastStrongRTL=-1;
+ if (_prop == _S) /* add LRM before S */
+ {
+ addPoint(pBiDi, start0, LRM_BEFORE);
+ pInsertPoints->confirmed=pInsertPoints->size;
}
+ break;
- /* now process the sequence of ET like a single ET */
- if((historyOfEN&PREV_EN_AFTER_W4) || /* previous was EN before (W5) */
- (nextDirProp==EN && lastStrong!=AL) /* next is EN and (W2) won't make it AN */
- ) {
- /* (W5) */
- if(lastStrong!=L) {
- dirProp=EN;
- } else {
- /* (W7) */
- dirProp=L;
+ case 4: /* R/AL after possible relevant EN/AN */
+ /* just clean up */
+ pInsertPoints=&(pBiDi->insertPoints);
+ if (pInsertPoints->capacity > 0)
+ /* remove all non confirmed insert points */
+ pInsertPoints->size=pInsertPoints->confirmed;
+ pLevState->startON=-1;
+ pLevState->startL2EN=-1;
+ pLevState->lastStrongRTL=limit - 1;
+ break;
+
+ case 5: /* EN/AN after R/AL + possible cont */
+ /* check for real AN */
+ if ((_prop == _AN) && (NO_CONTEXT_RTL(pBiDi->dirProps[start0]) == AN) &&
+ (pBiDi->reorderingMode!=UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL))
+ {
+ /* real AN */
+ if (pLevState->startL2EN == -1) /* if no relevant EN already found */
+ {
+ /* just note the righmost digit as a strong RTL */
+ pLevState->lastStrongRTL=limit - 1;
+ break;
}
- } else {
- /* (W6) */
- dirProp=ON;
+ if (pLevState->startL2EN >= 0) /* after EN, no AN */
+ {
+ addPoint(pBiDi, pLevState->startL2EN, LRM_BEFORE);
+ pLevState->startL2EN=-2;
+ }
+ /* note AN */
+ addPoint(pBiDi, start0, LRM_BEFORE);
+ break;
+ }
+ /* if first EN/AN after R/AL */
+ if (pLevState->startL2EN == -1) {
+ pLevState->startL2EN=start0;
}
+ break;
- /* apply the result of (W1), (W5)..(W7) to the entire sequence of ET */
+ case 6: /* note location of latest R/AL */
+ pLevState->lastStrongRTL=limit - 1;
+ pLevState->startON=-1;
break;
- case NSM:
- /* (W1) */
- dirProp=prevDirProp;
- /* set historyOfEN back to prevDirProp's historyOfEN */
- historyOfEN>>=EN_SHIFT;
- /*
- * Technically, this should be done before the switch() in the form
- * if(nextDirProp==NSM) {
- * dirProps[next]=nextDirProp=dirProp;
- * }
- *
- * - effectively one iteration ahead.
- * However, whether the next dirProp is NSM or is equal to the current dirProp
- * does not change the outcome of any condition in (W2)..(W7).
- */
+
+ case 7: /* L after R+ON/EN/AN */
+ /* include possible adjacent number on the left */
+ for (k=start0-1; k>=0 && !(levels[k]&1); k--);
+ if(k>=0) {
+ addPoint(pBiDi, k, RLM_BEFORE); /* add RLM before */
+ pInsertPoints=&(pBiDi->insertPoints);
+ pInsertPoints->confirmed=pInsertPoints->size; /* confirm it */
+ }
+ pLevState->startON=start0;
break;
- default:
+
+ case 8: /* AN after L */
+ /* AN numbers between L text on both sides may be trouble. */
+ /* tentatively bracket with LRMs; will be confirmed if followed by L */
+ addPoint(pBiDi, start0, LRM_BEFORE); /* add LRM before */
+ addPoint(pBiDi, start0, LRM_AFTER); /* add LRM after */
break;
- }
- /* here, it is always [prev,this,next]dirProp!=BN; it may be next>i+1 */
+ case 9: /* R after L+ON/EN/AN */
+ /* false alert, infirm LRMs around previous AN */
+ pInsertPoints=&(pBiDi->insertPoints);
+ pInsertPoints->size=pInsertPoints->confirmed;
+ if (_prop == _S) /* add RLM before S */
+ {
+ addPoint(pBiDi, start0, RLM_BEFORE);
+ pInsertPoints->confirmed=pInsertPoints->size;
+ }
+ break;
- /* perform (Nn) - here, only L, R, EN, AN, and neutrals are left */
- /* for "inverse BiDi", treat neutrals like L */
- /* this is one iteration late for the neutrals */
- if(DIRPROP_FLAG(dirProp)&MASK_N) {
- if(neutralStart<0) {
- /* start of a sequence of neutrals */
- neutralStart=i;
- beforeNeutral=prevDirProp;
+ case 10: /* L after L+ON/AN */
+ level=pLevState->runLevel + addLevel;
+ for(k=pLevState->startON; k<start0; k++) {
+ if (levels[k]<level)
+ levels[k]=level;
}
- } else /* not a neutral, can be only one of { L, R, EN, AN } */ {
- /*
- * Note that all levels[] values are still the same at this
- * point because this function is called for an entire
- * same-level run.
- * Therefore, we need to read only one actual level.
- */
- UBiDiLevel level=levels[i];
-
- if(neutralStart>=0) {
- UBiDiLevel final;
- /* end of a sequence of neutrals (dirProp is "afterNeutral") */
- if(!(pBiDi->isInverse)) {
- if(beforeNeutral==L) {
- if(dirProp==L) {
- final=0; /* make all neutrals L (N1) */
- } else {
- final=level; /* make all neutrals "e" (N2) */
- }
- } else /* beforeNeutral is one of { R, EN, AN } */ {
- if(dirProp==L) {
- final=level; /* make all neutrals "e" (N2) */
- } else {
- final=1; /* make all neutrals R (N1) */
- }
+ pInsertPoints=&(pBiDi->insertPoints);
+ pInsertPoints->confirmed=pInsertPoints->size; /* confirm inserts */
+ pLevState->startON=start0;
+ break;
+
+ case 11: /* L after L+ON+EN/AN/ON */
+ level=pLevState->runLevel;
+ for(k=start0-1; k>=pLevState->startON; k--) {
+ if(levels[k]==level+3) {
+ while(levels[k]==level+3) {
+ levels[k--]-=2;
}
- } else {
- /* "inverse BiDi": collapse [before]dirProps L, EN, AN into L */
- if(beforeNeutral!=R) {
- if(dirProp!=R) {
- final=0; /* make all neutrals L (N1) */
- } else {
- final=level; /* make all neutrals "e" (N2) */
- }
- } else /* beforeNeutral is one of { R, EN, AN } */ {
- if(dirProp!=R) {
- final=level; /* make all neutrals "e" (N2) */
- } else {
- final=1; /* make all neutrals R (N1) */
- }
+ while(levels[k]==level) {
+ k--;
}
}
- /* perform (In) on the sequence of neutrals */
- if((level^final)&1) {
- /* do something only if we need to _change_ the level */
- do {
- ++levels[neutralStart];
- } while(++neutralStart<i);
+ if(levels[k]==level+2) {
+ levels[k]=level;
+ continue;
}
- neutralStart=-1;
+ levels[k]=level+1;
}
+ break;
- /* perform (In) on the non-neutral character */
- /*
- * in the cases of (W5), processing a sequence of ET,
- * and of (X9), skipping BN,
- * there may be multiple characters from i to <next
- * that all get (virtually) the same dirProp and (really) the same level
- */
- if(dirProp==L) {
- if(level&1) {
- ++level;
- } else {
- i=next; /* we keep the levels */
- }
- } else if(dirProp==R) {
- if(!(level&1)) {
- ++level;
- } else {
- i=next; /* we keep the levels */
+ case 12: /* R after L+ON+EN/AN/ON */
+ level=pLevState->runLevel+1;
+ for(k=start0-1; k>=pLevState->startON; k--) {
+ if(levels[k]>level) {
+ levels[k]-=2;
}
- } else /* EN or AN */ {
- /* this level depends on whether we do "inverse BiDi" */
- level=numberLevel;
}
+ break;
- /* apply the new level to the sequence, if necessary */
- while(i<next) {
- levels[i++]=level;
- }
+ default: /* we should never get here */
+ start=start0+25;
+ start/=(start-start0-25); /* force program crash */
+ break;
+ }
+ }
+ if((addLevel) || (start < start0)) {
+ level=pLevState->runLevel + addLevel;
+ for(k=start; k<limit; k++) {
+ levels[k]=level;
}
}
+}
- /* perform (Nn) - here,
- the character after the the neutrals is eor, which is either L or R */
- /* this is one iteration late for the neutrals */
- if(neutralStart>=0) {
- /*
- * Note that all levels[] values are still the same at this
- * point because this function is called for an entire
- * same-level run.
- * Therefore, we need to read only one actual level.
- */
- UBiDiLevel level=levels[neutralStart], final;
+static void
+resolveImplicitLevels(UBiDi *pBiDi,
+ int32_t start, int32_t limit,
+ DirProp sor, DirProp eor) {
+ const DirProp *dirProps=pBiDi->dirProps;
- /* end of a sequence of neutrals (eor is "afterNeutral") */
- if(!(pBiDi->isInverse)) {
- if(beforeNeutral==L) {
- if(eor==L) {
- final=0; /* make all neutrals L (N1) */
- } else {
- final=level; /* make all neutrals "e" (N2) */
- }
- } else /* beforeNeutral is one of { R, EN, AN } */ {
- if(eor==L) {
- final=level; /* make all neutrals "e" (N2) */
- } else {
- final=1; /* make all neutrals R (N1) */
- }
- }
+ LevState levState;
+ int32_t i, start1, start2;
+ uint8_t oldStateImp, stateImp, actionImp;
+ uint8_t gprop, resProp, cell;
+ UBool inverseRTL;
+ DirProp nextStrongProp=R;
+ int32_t nextStrongPos=-1;
+
+ /* check for RTL inverse BiDi mode */
+ /* FOOD FOR THOUGHT: in case of RTL inverse BiDi, it would make sense to
+ * loop on the text characters from end to start.
+ * This would need a different properties state table (at least different
+ * actions) and different levels state tables (maybe very similar to the
+ * LTR corresponding ones.
+ */
+ inverseRTL=((start<pBiDi->lastArabicPos) && (GET_PARALEVEL(pBiDi, start) & 1) &&
+ (pBiDi->reorderingMode==UBIDI_REORDER_INVERSE_LIKE_DIRECT ||
+ pBiDi->reorderingMode==UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL));
+ /* initialize for levels state table */
+ levState.startL2EN=-1; /* used for INVERSE_LIKE_DIRECT_WITH_MARKS */
+ levState.lastStrongRTL=-1; /* used for INVERSE_LIKE_DIRECT_WITH_MARKS */
+ levState.state=0;
+ levState.runLevel=pBiDi->levels[start];
+ levState.pImpTab=((pBiDi->pImpTabPair)->pImpTab)[levState.runLevel&1];
+ levState.pImpAct=((pBiDi->pImpTabPair)->pImpAct)[levState.runLevel&1];
+ processPropertySeq(pBiDi, &levState, sor, start, start);
+ /* initialize for property state table */
+ if(dirProps[start]==NSM) {
+ stateImp = 1 + sor;
+ } else {
+ stateImp=0;
+ }
+ start1=start;
+ start2=start;
+
+ for(i=start; i<=limit; i++) {
+ if(i>=limit) {
+ gprop=eor;
} else {
- /* "inverse BiDi": collapse [before]dirProps L, EN, AN into L */
- if(beforeNeutral!=R) {
- if(eor!=R) {
- final=0; /* make all neutrals L (N1) */
- } else {
- final=level; /* make all neutrals "e" (N2) */
- }
- } else /* beforeNeutral is one of { R, EN, AN } */ {
- if(eor!=R) {
- final=level; /* make all neutrals "e" (N2) */
- } else {
- final=1; /* make all neutrals R (N1) */
+ DirProp prop, prop1;
+ prop=NO_CONTEXT_RTL(dirProps[i]);
+ if(inverseRTL) {
+ if(prop==AL) {
+ /* AL before EN does not make it AN */
+ prop=R;
+ } else if(prop==EN) {
+ if(nextStrongPos<=i) {
+ /* look for next strong char (L/R/AL) */
+ int32_t j;
+ nextStrongProp=R; /* set default */
+ nextStrongPos=limit;
+ for(j=i+1; j<limit; j++) {
+ prop1=NO_CONTEXT_RTL(dirProps[j]);
+ if(prop1==L || prop1==R || prop1==AL) {
+ nextStrongProp=prop1;
+ nextStrongPos=j;
+ break;
+ }
+ }
+ }
+ if(nextStrongProp==AL) {
+ prop=AN;
+ }
}
}
+ gprop=groupProp[prop];
}
- /* perform (In) on the sequence of neutrals */
- if((level^final)&1) {
- /* do something only if we need to _change_ the level */
- do {
- ++levels[neutralStart];
- } while(++neutralStart<limit);
+ oldStateImp=stateImp;
+ cell=impTabProps[oldStateImp][gprop];
+ stateImp=GET_STATEPROPS(cell); /* isolate the new state */
+ actionImp=GET_ACTIONPROPS(cell); /* isolate the action */
+ if((i==limit) && (actionImp==0)) {
+ /* there is an unprocessed sequence if its property == eor */
+ actionImp=1; /* process the last sequence */
+ }
+ if(actionImp) {
+ resProp=impTabProps[oldStateImp][IMPTABPROPS_RES];
+ switch(actionImp) {
+ case 1: /* process current seq1, init new seq1 */
+ processPropertySeq(pBiDi, &levState, resProp, start1, i);
+ start1=i;
+ break;
+ case 2: /* init new seq2 */
+ start2=i;
+ break;
+ case 3: /* process seq1, process seq2, init new seq1 */
+ processPropertySeq(pBiDi, &levState, resProp, start1, start2);
+ processPropertySeq(pBiDi, &levState, _ON, start2, i);
+ start1=i;
+ break;
+ case 4: /* process seq1, set seq1=seq2, init new seq2 */
+ processPropertySeq(pBiDi, &levState, resProp, start1, start2);
+ start1=start2;
+ start2=i;
+ break;
+ default: /* we should never get here */
+ start=start1+25;
+ start/=(start-start1-25); /* force program crash */
+ break;
+ }
}
}
+ /* flush possible pending sequence, e.g. ON */
+ processPropertySeq(pBiDi, &levState, eor, limit, limit);
}
/* perform (L1) and (X9) ---------------------------------------------------- */
int32_t i;
if(pBiDi->flags&MASK_WS) {
- UBiDiLevel paraLevel=pBiDi->paraLevel;
+ UBool orderParagraphsLTR=pBiDi->orderParagraphsLTR;
Flags flag;
i=pBiDi->trailingWSStart;
while(i>0) {
/* reset a sequence of WS/BN before eop and B/S to the paragraph paraLevel */
- while(i>0 && DIRPROP_FLAG(dirProps[--i])&MASK_WS) {
- levels[i]=paraLevel;
+ while(i>0 && (flag=DIRPROP_FLAG_NC(dirProps[--i]))&MASK_WS) {
+ if(orderParagraphsLTR&&(flag&DIRPROP_FLAG(B))) {
+ levels[i]=0;
+ } else {
+ levels[i]=GET_PARALEVEL(pBiDi, i);
+ }
}
/* reset BN to the next character's paraLevel until B/S, which restarts above loop */
/* here, i+1 is guaranteed to be <length */
while(i>0) {
- flag=DIRPROP_FLAG(dirProps[--i]);
+ flag=DIRPROP_FLAG_NC(dirProps[--i]);
if(flag&MASK_BN_EXPLICIT) {
levels[i]=levels[i+1];
+ } else if(orderParagraphsLTR&&(flag&DIRPROP_FLAG(B))) {
+ levels[i]=0;
+ break;
} else if(flag&MASK_B_S) {
- levels[i]=paraLevel;
+ levels[i]=GET_PARALEVEL(pBiDi, i);
break;
}
}
}
}
-/* -------------------------------------------------------------------------- */
-
-U_CAPI UBiDiDirection U_EXPORT2
-ubidi_getDirection(const UBiDi *pBiDi) {
- if(pBiDi!=NULL) {
- return pBiDi->direction;
- } else {
- return UBIDI_LTR;
+#define BIDI_MIN(x, y) ((x)<(y) ? (x) : (y))
+#define BIDI_ABS(x) ((x)>=0 ? (x) : (-(x)))
+static void
+setParaRunsOnly(UBiDi *pBiDi, const UChar *text, int32_t length,
+ UBiDiLevel paraLevel, UErrorCode *pErrorCode) {
+ void *runsOnlyMemory;
+ int32_t *visualMap;
+ UChar *visualText;
+ const UBiDiLevel *levels;
+ UBiDiLevel *saveLevels;
+ Run *runs;
+ int32_t visualLength, i, j, visualStart, logicalStart,
+ runCount, runLength, addedRuns, insertRemove,
+ start, limit, step, indexOddBit, logicalPos,
+ index, index1;
+ uint32_t saveOptions;
+
+ pBiDi->reorderingMode=UBIDI_REORDER_DEFAULT;
+ if(length==0) {
+ ubidi_setPara(pBiDi, text, length, paraLevel, NULL, pErrorCode);
+ goto cleanup3;
}
-}
-
-U_CAPI const UChar * U_EXPORT2
-ubidi_getText(const UBiDi *pBiDi) {
- if(pBiDi!=NULL) {
- return pBiDi->text;
- } else {
- return NULL;
+ /* obtain memory for mapping table and visual text */
+ runsOnlyMemory=uprv_malloc(length*(sizeof(int32_t)+sizeof(UChar)+sizeof(UBiDiLevel)));
+ if(runsOnlyMemory==NULL) {
+ *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+ goto cleanup3;
}
-}
-
-U_CAPI int32_t U_EXPORT2
-ubidi_getLength(const UBiDi *pBiDi) {
- if(pBiDi!=NULL) {
- return pBiDi->length;
- } else {
- return 0;
+ visualMap=runsOnlyMemory;
+ visualText=(UChar *)&visualMap[length];
+ saveLevels=(UBiDiLevel *)&visualText[length];
+ saveOptions=pBiDi->reorderingOptions;
+ if(saveOptions & UBIDI_OPTION_INSERT_MARKS) {
+ pBiDi->reorderingOptions&=~UBIDI_OPTION_INSERT_MARKS;
+ pBiDi->reorderingOptions|=UBIDI_OPTION_REMOVE_CONTROLS;
}
-}
+ ubidi_setPara(pBiDi, text, length, paraLevel, NULL, pErrorCode);
+ levels=ubidi_getLevels(pBiDi, pErrorCode);
+
+ /* FOOD FOR THOUGHT: instead of writing the visual text, we could use
+ * the visual map and the dirProps array to drive the second call
+ * to ubidi_setPara (but must make provision for possible removal of
+ * BiDi controls. Alternatively, only use the dirProps array via
+ * customized classifier callback.
+ */
+ visualLength=ubidi_writeReordered(pBiDi, visualText, length,
+ UBIDI_DO_MIRRORING, pErrorCode);
+ pBiDi->reorderingOptions=saveOptions;
+ ubidi_getVisualMap(pBiDi, visualMap, pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ goto cleanup2;
+ }
+ uprv_memcpy(saveLevels, levels, length*sizeof(UBiDiLevel));
-U_CAPI UBiDiLevel U_EXPORT2
-ubidi_getParaLevel(const UBiDi *pBiDi) {
- if(pBiDi!=NULL) {
- return pBiDi->paraLevel;
- } else {
- return 0;
+ pBiDi->reorderingMode=UBIDI_REORDER_INVERSE_LIKE_DIRECT;
+ paraLevel=pBiDi->paraLevel^1;
+ ubidi_setPara(pBiDi, visualText, visualLength, paraLevel, NULL, pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ goto cleanup1;
+ }
+ ubidi_getRuns(pBiDi);
+ /* check if some runs must be split, count how many splits */
+ addedRuns=0;
+ runCount=pBiDi->runCount;
+ runs=pBiDi->runs;
+ visualStart=0;
+ for(i=0; i<runCount; i++, visualStart+=runLength) {
+ runLength=runs[i].visualLimit-visualStart;
+ if(runLength<2) {
+ continue;
+ }
+ logicalStart=GET_INDEX(runs[i].logicalStart);
+ for(j=logicalStart+1; j<logicalStart+runLength; j++) {
+ index=visualMap[j];
+ index1=visualMap[j-1];
+ if((BIDI_ABS(index-index1)!=1) || (saveLevels[index]!=saveLevels[index1])) {
+ addedRuns++;
+ }
+ }
+ }
+ if(addedRuns) {
+ if(getRunsMemory(pBiDi, runCount+addedRuns)) {
+ if(runCount==1) {
+ /* because we switch from UBiDi.simpleRuns to UBiDi.runs */
+ pBiDi->runsMemory[0]=runs[0];
+ }
+ runs=pBiDi->runs=pBiDi->runsMemory;
+ pBiDi->runCount+=addedRuns;
+ } else {
+ goto cleanup1;
+ }
+ }
+ /* split runs which are not consecutive in source text */
+ for(i=runCount-1; i>=0; i--) {
+ runLength= i==0 ? runs[0].visualLimit :
+ runs[i].visualLimit-runs[i-1].visualLimit;
+ logicalStart=runs[i].logicalStart;
+ indexOddBit=GET_ODD_BIT(logicalStart);
+ logicalStart=GET_INDEX(logicalStart);
+ if(runLength<2) {
+ if(addedRuns) {
+ runs[i+addedRuns]=runs[i];
+ }
+ logicalPos=visualMap[logicalStart];
+ runs[i+addedRuns].logicalStart=MAKE_INDEX_ODD_PAIR(logicalPos,
+ saveLevels[logicalPos]^indexOddBit);
+ continue;
+ }
+ if(indexOddBit) {
+ start=logicalStart;
+ limit=logicalStart+runLength-1;
+ step=1;
+ } else {
+ start=logicalStart+runLength-1;
+ limit=logicalStart;
+ step=-1;
+ }
+ for(j=start; j!=limit; j+=step) {
+ index=visualMap[j];
+ index1=visualMap[j+step];
+ if((BIDI_ABS(index-index1)!=1) || (saveLevels[index]!=saveLevels[index1])) {
+ logicalPos=BIDI_MIN(visualMap[start], index);
+ runs[i+addedRuns].logicalStart=MAKE_INDEX_ODD_PAIR(logicalPos,
+ saveLevels[logicalPos]^indexOddBit);
+ runs[i+addedRuns].visualLimit=runs[i].visualLimit;
+ runs[i].visualLimit-=BIDI_ABS(j-start)+1;
+ insertRemove=runs[i].insertRemove&(LRM_AFTER|RLM_AFTER);
+ runs[i+addedRuns].insertRemove=insertRemove;
+ runs[i].insertRemove&=~insertRemove;
+ start=j+step;
+ addedRuns--;
+ }
+ }
+ if(addedRuns) {
+ runs[i+addedRuns]=runs[i];
+ }
+ logicalPos=BIDI_MIN(visualMap[start], visualMap[limit]);
+ runs[i+addedRuns].logicalStart=MAKE_INDEX_ODD_PAIR(logicalPos,
+ saveLevels[logicalPos]^indexOddBit);
}
+
+ cleanup1:
+ /* restore initial paraLevel */
+ pBiDi->paraLevel^=1;
+ cleanup2:
+ /* restore real text */
+ pBiDi->text=text;
+ /* free memory for mapping table and visual text */
+ uprv_free(runsOnlyMemory);
+ cleanup3:
+ pBiDi->reorderingMode=UBIDI_REORDER_RUNS_ONLY;
}
-/* statetable prototype ----------------------------------------------------- */
+/* ubidi_setPara ------------------------------------------------------------ */
-/*
- * This is here for possible future
- * performance work and is not compiled right now.
- */
+U_CAPI void U_EXPORT2
+ubidi_setPara(UBiDi *pBiDi, const UChar *text, int32_t length,
+ UBiDiLevel paraLevel, UBiDiLevel *embeddingLevels,
+ UErrorCode *pErrorCode) {
+ UBiDiDirection direction;
-#if 0
-/*
- * This is a piece of code that could be part of ubidi.c/resolveImplicitLevels().
- * It replaces in the (Wn) state machine the switch()-if()-cascade with
- * just a few if()s and a state table.
- */
+ /* check the argument values */
+ if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+ return;
+ } else if(pBiDi==NULL || text==NULL ||
+ ((UBIDI_MAX_EXPLICIT_LEVEL<paraLevel) && !IS_DEFAULT_LEVEL(paraLevel)) ||
+ length<-1
+ ) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
-/* use the state table only for the following dirProp's */
-#define MASK_W_TABLE (FLAG(L)|FLAG(R)|FLAG(AL)|FLAG(EN)|FLAG(ES)|FLAG(CS)|FLAG(ET)|FLAG(AN))
+ if(length==-1) {
+ length=u_strlen(text);
+ }
-/*
- * inputs:
- *
- * 0..1 historyOfEN - 2b
- * 2 prevDirProp==AN - 1b
- * 3..4 lastStrong, one of { L, R, AL, none } - 2b
- * 5..7 dirProp, one of { L, R, AL, EN, ES, CS, ET, AN } - 3b
- * 8..9 nextDirProp, one of { EN, AN, other }
- *
- * total: 10b=1024 states
- */
-enum { _L, _R, _AL, _EN, _ES, _CS, _ET, _AN, _OTHER }; /* lastStrong, dirProp */
-enum { __EN, __AN, __OTHER }; /* nextDirProp */
+ /* special treatment for RUNS_ONLY mode */
+ if(pBiDi->reorderingMode==UBIDI_REORDER_RUNS_ONLY) {
+ setParaRunsOnly(pBiDi, text, length, paraLevel, pErrorCode);
+ return;
+ }
-#define LAST_STRONG_SHIFT 3
-#define DIR_PROP_SHIFT 5
-#define NEXT_DIR_PROP_SHIFT 8
+ /* initialize the UBiDi structure */
+ pBiDi->pParaBiDi=NULL; /* mark unfinished setPara */
+ pBiDi->text=text;
+ pBiDi->length=pBiDi->originalLength=pBiDi->resultLength=length;
+ pBiDi->paraLevel=paraLevel;
+ pBiDi->direction=UBIDI_LTR;
+ pBiDi->paraCount=1;
-/* masks after shifting */
-#define LAST_STRONG_MASK 3
-#define DIR_PROP_MASK 7
-#define STATE_MASK 0x1f
+ pBiDi->dirProps=NULL;
+ pBiDi->levels=NULL;
+ pBiDi->runs=NULL;
+ pBiDi->insertPoints.size=0; /* clean up from last call */
+ pBiDi->insertPoints.confirmed=0; /* clean up from last call */
-/* convert dirProp into _dirProp (above enum) */
-static DirProp inputDirProp[dirPropCount]={ _X<<DIR_PROP_SHIFT, ... };
+ /*
+ * Save the original paraLevel if contextual; otherwise, set to 0.
+ */
+ if(IS_DEFAULT_LEVEL(paraLevel)) {
+ pBiDi->defaultParaLevel=paraLevel;
+ } else {
+ pBiDi->defaultParaLevel=0;
+ }
-/* convert dirProp into __dirProp (above enum) */
-static DirProp inputNextDirProp[dirPropCount]={ __X<<NEXT_DIR_PROP_SHIFT, ... };
+ if(length==0) {
+ /*
+ * For an empty paragraph, create a UBiDi object with the paraLevel and
+ * the flags and the direction set but without allocating zero-length arrays.
+ * There is nothing more to do.
+ */
+ if(IS_DEFAULT_LEVEL(paraLevel)) {
+ pBiDi->paraLevel&=1;
+ pBiDi->defaultParaLevel=0;
+ }
+ if(paraLevel&1) {
+ pBiDi->flags=DIRPROP_FLAG(R);
+ pBiDi->direction=UBIDI_RTL;
+ } else {
+ pBiDi->flags=DIRPROP_FLAG(L);
+ pBiDi->direction=UBIDI_LTR;
+ }
-/*
- * outputs:
- *
- * dirProp, one of { L, R, EN, AN, ON } - 3b
- *
- * 0..1 historyOfEN - 2b
- * 2 prevDirProp==AN - 1b
- * 3..4 lastStrong, one of { L, R, AL, none } - 2b
- * 5..7 new dirProp, one of { L, R, EN, AN, ON }
- *
- * total: 8 bits=1 byte per state
- */
-enum { ___L, ___R, ___EN, ___AN, ___ON, ___count };
+ pBiDi->runCount=0;
+ pBiDi->pParaBiDi=pBiDi; /* mark successful setPara */
+ return;
+ }
-/* convert ___dirProp into dirProp (above enum) */
-static DirProp outputDirProp[___count]={ X, ... };
+ pBiDi->runCount=-1;
-/* state table */
-static uint8_t wnTable[1024]={ /* calculate with switch()-if()-cascade */ };
+ /*
+ * Get the directional properties,
+ * the flags bit-set, and
+ * determine the paragraph level if necessary.
+ */
+ if(getDirPropsMemory(pBiDi, length)) {
+ pBiDi->dirProps=pBiDi->dirPropsMemory;
+ getDirProps(pBiDi);
+ } else {
+ *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ /* the processed length may have changed if UBIDI_OPTION_STREAMING */
+ length= pBiDi->length;
+ pBiDi->trailingWSStart=length; /* the levels[] will reflect the WS run */
+ /* allocate paras memory */
+ if(pBiDi->paraCount>1) {
+ if(getInitialParasMemory(pBiDi, pBiDi->paraCount)) {
+ pBiDi->paras=pBiDi->parasMemory;
+ pBiDi->paras[pBiDi->paraCount-1]=length;
+ } else {
+ *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ } else {
+ /* initialize paras for single paragraph */
+ pBiDi->paras=pBiDi->simpleParas;
+ pBiDi->simpleParas[0]=length;
+ }
-static void
-resolveImplicitLevels(BiDi *pBiDi,
- Index start, Index end,
- DirProp sor, DirProp eor) {
- /* new variable */
- uint8_t state;
-
- /* remove variable lastStrong */
-
- /* set initial state (set lastStrong, the rest is 0) */
- state= sor==L ? 0 : _R<<LAST_STRONG_SHIFT;
-
- while(next<limit) {
- /* advance */
- prevDirProp=dirProp;
- dirProp=nextDirProp;
- i=next;
- do {
- if(++next<limit) {
- nextDirProp=dirProps[next];
+ /* are explicit levels specified? */
+ if(embeddingLevels==NULL) {
+ /* no: determine explicit levels according to the (Xn) rules */\
+ if(getLevelsMemory(pBiDi, length)) {
+ pBiDi->levels=pBiDi->levelsMemory;
+ direction=resolveExplicitLevels(pBiDi);
+ } else {
+ *pErrorCode=U_MEMORY_ALLOCATION_ERROR;
+ return;
+ }
+ } else {
+ /* set BN for all explicit codes, check that all levels are 0 or paraLevel..UBIDI_MAX_EXPLICIT_LEVEL */
+ pBiDi->levels=embeddingLevels;
+ direction=checkExplicitLevels(pBiDi, pErrorCode);
+ if(U_FAILURE(*pErrorCode)) {
+ return;
+ }
+ }
+
+ /*
+ * The steps after (X9) in the UBiDi algorithm are performed only if
+ * the paragraph text has mixed directionality!
+ */
+ pBiDi->direction=direction;
+ switch(direction) {
+ case UBIDI_LTR:
+ /* make sure paraLevel is even */
+ pBiDi->paraLevel=(UBiDiLevel)((pBiDi->paraLevel+1)&~1);
+
+ /* all levels are implicitly at paraLevel (important for ubidi_getLevels()) */
+ pBiDi->trailingWSStart=0;
+ break;
+ case UBIDI_RTL:
+ /* make sure paraLevel is odd */
+ pBiDi->paraLevel|=1;
+
+ /* all levels are implicitly at paraLevel (important for ubidi_getLevels()) */
+ pBiDi->trailingWSStart=0;
+ break;
+ default:
+ /*
+ * Choose the right implicit state table
+ */
+ switch(pBiDi->reorderingMode) {
+ case UBIDI_REORDER_DEFAULT:
+ pBiDi->pImpTabPair=&impTab_DEFAULT;
+ break;
+ case UBIDI_REORDER_NUMBERS_SPECIAL:
+ pBiDi->pImpTabPair=&impTab_NUMBERS_SPECIAL;
+ break;
+ case UBIDI_REORDER_GROUP_NUMBERS_WITH_R:
+ pBiDi->pImpTabPair=&impTab_GROUP_NUMBERS_WITH_R;
+ break;
+ case UBIDI_REORDER_RUNS_ONLY:
+ /* we should never get here */
+ pBiDi=NULL;
+ pBiDi->text=NULL; /* make the program crash! */
+ break;
+ case UBIDI_REORDER_INVERSE_NUMBERS_AS_L:
+ pBiDi->pImpTabPair=&impTab_INVERSE_NUMBERS_AS_L;
+ break;
+ case UBIDI_REORDER_INVERSE_LIKE_DIRECT:
+ if (pBiDi->reorderingOptions & UBIDI_OPTION_INSERT_MARKS) {
+ pBiDi->pImpTabPair=&impTab_INVERSE_LIKE_DIRECT_WITH_MARKS;
} else {
- nextDirProp=eor;
- break;
+ pBiDi->pImpTabPair=&impTab_INVERSE_LIKE_DIRECT;
+ }
+ break;
+ case UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL:
+ if (pBiDi->reorderingOptions & UBIDI_OPTION_INSERT_MARKS) {
+ pBiDi->pImpTabPair=&impTab_INVERSE_FOR_NUMBERS_SPECIAL_WITH_MARKS;
+ } else {
+ pBiDi->pImpTabPair=&impTab_INVERSE_FOR_NUMBERS_SPECIAL;
+ }
+ break;
+ default:
+ pBiDi->pImpTabPair=&impTab_DEFAULT;
+ break;
+ }
+ /*
+ * If there are no external levels specified and there
+ * are no significant explicit level codes in the text,
+ * then we can treat the entire paragraph as one run.
+ * Otherwise, we need to perform the following rules on runs of
+ * the text with the same embedding levels. (X10)
+ * "Significant" explicit level codes are ones that actually
+ * affect non-BN characters.
+ * Examples for "insignificant" ones are empty embeddings
+ * LRE-PDF, LRE-RLE-PDF-PDF, etc.
+ */
+ if(embeddingLevels==NULL && !(pBiDi->flags&DIRPROP_FLAG_MULTI_RUNS)) {
+ resolveImplicitLevels(pBiDi, 0, length,
+ GET_LR_FROM_LEVEL(GET_PARALEVEL(pBiDi, 0)),
+ GET_LR_FROM_LEVEL(GET_PARALEVEL(pBiDi, length-1)));
+ } else {
+ /* sor, eor: start and end types of same-level-run */
+ UBiDiLevel *levels=pBiDi->levels;
+ int32_t start, limit=0;
+ UBiDiLevel level, nextLevel;
+ DirProp sor, eor;
+
+ /* determine the first sor and set eor to it because of the loop body (sor=eor there) */
+ level=GET_PARALEVEL(pBiDi, 0);
+ nextLevel=levels[0];
+ if(level<nextLevel) {
+ eor=GET_LR_FROM_LEVEL(nextLevel);
+ } else {
+ eor=GET_LR_FROM_LEVEL(level);
}
- } while(FLAG(nextDirProp)&MASK_BN_EXPLICIT);
-
- /* (W1..W7) */
- /* ### This may be more efficient with a switch(dirProp). */
- if(FLAG(dirProp)&MASK_W_TABLE) {
- state=wnTable[
- ((int)state)|
- inputDirProp[dirProp]|
- inputNextDirProp[nextDirProp]
- ];
- dirProp=outputDirProp[state>>DIR_PROP_SHIFT];
- state&=STATE_MASK;
- } else if(dirProp==ET) {
- /* get sequence of ET; advance only next, not current, previous or historyOfEN */
- while(next<limit && FLAG(nextDirProp)&MASK_ET_NSM_BN /* (W1), (X9) */) {
- if(++next<limit) {
- nextDirProp=dirProps[next];
+
+ do {
+ /* determine start and limit of the run (end points just behind the run) */
+
+ /* the values for this run's start are the same as for the previous run's end */
+ start=limit;
+ level=nextLevel;
+ if((start>0) && (NO_CONTEXT_RTL(pBiDi->dirProps[start-1])==B)) {
+ /* except if this is a new paragraph, then set sor = para level */
+ sor=GET_LR_FROM_LEVEL(GET_PARALEVEL(pBiDi, start));
} else {
- nextDirProp=eor;
- break;
+ sor=eor;
}
- }
- state=wnTable[
- ((int)state)|
- _ET<<DIR_PROP_SHIFT|
- inputNextDirProp[nextDirProp]
- ];
- dirProp=outputDirProp[state>>DIR_PROP_SHIFT];
- state&=STATE_MASK;
-
- /* apply the result of (W1), (W5)..(W7) to the entire sequence of ET */
- } else if(dirProp==NSM) {
- /* (W1) */
- dirProp=prevDirProp;
- /* keep prevDirProp's EN and AN states! */
- } else /* other */ {
- /* set EN and AN states to 0 */
- state&=LAST_STRONG_MASK<<LAST_STRONG_SHIFT;
+ /* search for the limit of this run */
+ while(++limit<length && levels[limit]==level) {}
+
+ /* get the correct level of the next run */
+ if(limit<length) {
+ nextLevel=levels[limit];
+ } else {
+ nextLevel=GET_PARALEVEL(pBiDi, length-1);
+ }
+
+ /* determine eor from max(level, nextLevel); sor is last run's eor */
+ if((level&~UBIDI_LEVEL_OVERRIDE)<(nextLevel&~UBIDI_LEVEL_OVERRIDE)) {
+ eor=GET_LR_FROM_LEVEL(nextLevel);
+ } else {
+ eor=GET_LR_FROM_LEVEL(level);
+ }
+
+ /* if the run consists of overridden directional types, then there
+ are no implicit types to be resolved */
+ if(!(level&UBIDI_LEVEL_OVERRIDE)) {
+ resolveImplicitLevels(pBiDi, start, limit, sor, eor);
+ } else {
+ /* remove the UBIDI_LEVEL_OVERRIDE flags */
+ do {
+ levels[start++]&=~UBIDI_LEVEL_OVERRIDE;
+ } while(start<limit);
+ }
+ } while(limit<length);
+ }
+ /* check if we got any memory shortage while adding insert points */
+ if (U_FAILURE(pBiDi->insertPoints.errorCode))
+ {
+ *pErrorCode=pBiDi->insertPoints.errorCode;
+ return;
}
+ /* reset the embedding levels for some non-graphic characters (L1), (X9) */
+ adjustWSLevels(pBiDi);
+ break;
+ }
+ if(pBiDi->reorderingOptions & UBIDI_OPTION_REMOVE_CONTROLS) {
+ pBiDi->resultLength -= pBiDi->controlCount;
+ } else {
+ pBiDi->resultLength += pBiDi->insertPoints.size;
+ }
+ pBiDi->pParaBiDi=pBiDi; /* mark successful setPara */
+}
- /* perform (Nn) and (In) as usual */
+U_CAPI void U_EXPORT2
+ubidi_orderParagraphsLTR(UBiDi *pBiDi, UBool orderParagraphsLTR) {
+ if(pBiDi!=NULL) {
+ pBiDi->orderParagraphsLTR=orderParagraphsLTR;
}
- /* perform (Nn) and (In) as usual */
}
-#endif
+
+U_CAPI UBool U_EXPORT2
+ubidi_isOrderParagraphsLTR(UBiDi *pBiDi) {
+ if(pBiDi!=NULL) {
+ return pBiDi->orderParagraphsLTR;
+ } else {
+ return FALSE;
+ }
+}
+
+U_CAPI UBiDiDirection U_EXPORT2
+ubidi_getDirection(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->direction;
+ } else {
+ return UBIDI_LTR;
+ }
+}
+
+U_CAPI const UChar * U_EXPORT2
+ubidi_getText(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->text;
+ } else {
+ return NULL;
+ }
+}
+
+U_CAPI int32_t U_EXPORT2
+ubidi_getLength(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->originalLength;
+ } else {
+ return 0;
+ }
+}
+
+U_CAPI int32_t U_EXPORT2
+ubidi_getProcessedLength(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->length;
+ } else {
+ return 0;
+ }
+}
+
+U_CAPI int32_t U_EXPORT2
+ubidi_getResultLength(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->resultLength;
+ } else {
+ return 0;
+ }
+}
+
+/* paragraphs API functions ------------------------------------------------- */
+
+U_CAPI UBiDiLevel U_EXPORT2
+ubidi_getParaLevel(const UBiDi *pBiDi) {
+ if(IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return pBiDi->paraLevel;
+ } else {
+ return 0;
+ }
+}
+
+U_CAPI int32_t U_EXPORT2
+ubidi_countParagraphs(UBiDi *pBiDi) {
+ if(!IS_VALID_PARA_OR_LINE(pBiDi)) {
+ return 0;
+ } else {
+ return pBiDi->paraCount;
+ }
+}
+
+U_CAPI void U_EXPORT2
+ubidi_getParagraphByIndex(const UBiDi *pBiDi, int32_t paraIndex,
+ int32_t *pParaStart, int32_t *pParaLimit,
+ UBiDiLevel *pParaLevel, UErrorCode *pErrorCode) {
+ int32_t paraStart;
+
+ /* check the argument values */
+ if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+ return;
+ } else if( !IS_VALID_PARA_OR_LINE(pBiDi) || /* no valid setPara/setLine */
+ paraIndex<0 || paraIndex>=pBiDi->paraCount ) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+ pBiDi=pBiDi->pParaBiDi; /* get Para object if Line object */
+ if(paraIndex) {
+ paraStart=pBiDi->paras[paraIndex-1];
+ } else {
+ paraStart=0;
+ }
+ if(pParaStart!=NULL) {
+ *pParaStart=paraStart;
+ }
+ if(pParaLimit!=NULL) {
+ *pParaLimit=pBiDi->paras[paraIndex];
+ }
+ if(pParaLevel!=NULL) {
+ *pParaLevel=GET_PARALEVEL(pBiDi, paraStart);
+ }
+ return;
+}
+
+U_CAPI int32_t U_EXPORT2
+ubidi_getParagraph(const UBiDi *pBiDi, int32_t charIndex,
+ int32_t *pParaStart, int32_t *pParaLimit,
+ UBiDiLevel *pParaLevel, UErrorCode *pErrorCode) {
+ uint32_t paraIndex;
+
+ /* check the argument values */
+ /* pErrorCode will be checked by the call to ubidi_getParagraphByIndex */
+ if( !IS_VALID_PARA_OR_LINE(pBiDi)) {/* no valid setPara/setLine */
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return -1;
+ }
+ pBiDi=pBiDi->pParaBiDi; /* get Para object if Line object */
+ if( charIndex<0 || charIndex>=pBiDi->length ) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return -1;
+ }
+ for(paraIndex=0; charIndex>=pBiDi->paras[paraIndex]; paraIndex++);
+ ubidi_getParagraphByIndex(pBiDi, paraIndex, pParaStart, pParaLimit, pParaLevel, pErrorCode);
+ return paraIndex;
+}
+
+U_CAPI void U_EXPORT2
+ubidi_setClassCallback(UBiDi *pBiDi, UBiDiClassCallback *newFn,
+ const void *newContext, UBiDiClassCallback **oldFn,
+ const void **oldContext, UErrorCode *pErrorCode)
+{
+ if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
+ return;
+ } else if(pBiDi==NULL) {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+ if( oldFn )
+ {
+ *oldFn = pBiDi->fnClassCallback;
+ }
+ if( oldContext )
+ {
+ *oldContext = pBiDi->coClassCallback;
+ }
+ pBiDi->fnClassCallback = newFn;
+ pBiDi->coClassCallback = newContext;
+}
+
+U_CAPI void U_EXPORT2
+ubidi_getClassCallback(UBiDi *pBiDi, UBiDiClassCallback **fn, const void **context)
+{
+ if( fn )
+ {
+ *fn = pBiDi->fnClassCallback;
+ }
+ if( context )
+ {
+ *context = pBiDi->coClassCallback;
+ }
+}
+
+U_CAPI UCharDirection U_EXPORT2
+ubidi_getCustomizedClass(UBiDi *pBiDi, UChar32 c)
+{
+ UCharDirection dir;
+
+ if( pBiDi->fnClassCallback == NULL ||
+ (dir = (*pBiDi->fnClassCallback)(pBiDi->coClassCallback, c)) == U_BIDI_CLASS_DEFAULT )
+ {
+ return ubidi_getClass(pBiDi->bdp, c);
+ } else {
+ return dir;
+ }
+}
+
projects / apple / icu.git / blobdiff