U_CAPI UCharDirection U_EXPORT2
u_charDirection(UChar32 c) {
UErrorCode errorCode=U_ZERO_ERROR;
const UBiDiProps *bdp=ubidi_getSingleton(&errorCode);
if(bdp!=NULL) {
return ubidi_getClass(bdp, c);
} else {
return U_LEFT_TO_RIGHT;
}
}
/*
* This function shapes European digits to Arabic-Indic digits
* in-place, writing over the input characters.
* Since we know that we are only looking for BMP code points,
* we can safely just work with code units (again, at least UTF-16).
*/
static void
_shapeToArabicDigitsWithContext(UChar *s, int32_t length,
UChar digitBase,
UBool isLogical, UBool lastStrongWasAL) {
const UBiDiProps *bdp;
UErrorCode errorCode;
int32_t i;
UChar c;
errorCode=U_ZERO_ERROR;
bdp=ubidi_getSingleton(&errorCode);
if(U_FAILURE(errorCode)) {
return;
}
digitBase-=0x30;
/* the iteration direction depends on the type of input */
if(isLogical) {
for(i=0; i<length; ++i) {
c=s[i];
switch(ubidi_getClass(bdp, c)) {
case U_LEFT_TO_RIGHT: /* L */
case U_RIGHT_TO_LEFT: /* R */
lastStrongWasAL=FALSE;
break;
case U_RIGHT_TO_LEFT_ARABIC: /* AL */
lastStrongWasAL=TRUE;
break;
case U_EUROPEAN_NUMBER: /* EN */
if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
}
break;
default :
break;
}
}
} else {
for(i=length; i>0; /* pre-decrement in the body */) {
c=s[--i];
switch(ubidi_getClass(bdp, c)) {
case U_LEFT_TO_RIGHT: /* L */
case U_RIGHT_TO_LEFT: /* R */
lastStrongWasAL=FALSE;
break;
case U_RIGHT_TO_LEFT_ARABIC: /* AL */
lastStrongWasAL=TRUE;
break;
case U_EUROPEAN_NUMBER: /* EN */
if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
}
break;
default :
break;
}
}
}
}
U_CFUNC UCharDirection
u_charDirection(UChar32 c) {
return ubidi_getClass(&ubidi_props_singleton, c);
}
