377     int32_t length=pBiDi->proLength;  in firstL_R_AL()
475         if(pBiDi->proLength>0 &&                    /* there is a prologue */  in getDirProps()
2072     int32_t length=pBiDi->proLength;  in lastL_R_AL()
2157     if(start==0 && pBiDi->proLength>0) {  in resolveImplicitLevels()
2329                  const UChar *prologue, int32_t proLength,  in ubidi_setContext()  argument
2334     if(pBiDi==NULL || proLength<-1 || epiLength<-1 ||  in ubidi_setContext()
2335        (prologue==NULL && proLength!=0) || (epilogue==NULL && epiLength!=0)) {  in ubidi_setContext()
2340     if(proLength==-1) {  in ubidi_setContext()
2341         pBiDi->proLength=u_strlen(prologue);  in ubidi_setContext()
2343         pBiDi->proLength=proLength;  in ubidi_setContext()
2356     pBiDi->proLength=0;                 /* forget the last context */  in setParaSuccess()