598     int32_t nextIdx = modChunkSize(fEndBufIdx + 1);  in addFollowing()  local
599     if (nextIdx == fStartBufIdx) {  in addFollowing()
602     fBoundaries[nextIdx] = position;  in addFollowing()
603     fStatuses[nextIdx] = static_cast<uint16_t>(ruleStatusIdx);  in addFollowing()
604     fEndBufIdx = nextIdx;  in addFollowing()
607         fBufIdx = nextIdx;  in addFollowing()
613         U_ASSERT(nextIdx != fBufIdx);  in addFollowing()
620     int32_t nextIdx = modChunkSize(fStartBufIdx - 1);  in addPreceding()  local
621     if (nextIdx == fEndBufIdx) {  in addPreceding()
630     fBoundaries[nextIdx] = position;  in addPreceding()
631     fStatuses[nextIdx] = static_cast<uint16_t>(ruleStatusIdx);  in addPreceding()
632     fStartBufIdx = nextIdx;  in addPreceding()
634         fBufIdx = nextIdx;  in addPreceding()