ONIGENC_STEP_BACK 2641 ext/mbstring/oniguruma/regexec.c       s = (UChar* )ONIGENC_STEP_BACK(encode, str, s, (int )tlen);
ONIGENC_STEP_BACK 2651 ext/mbstring/oniguruma/regexec.c       q = (UChar* )ONIGENC_STEP_BACK(encode, str, s, (int )tlen);
ONIGENC_STEP_BACK 3512 ext/mbstring/oniguruma/regexec.c       UChar* pre_end = ONIGENC_STEP_BACK(reg->enc, str, end, 1);
ONIGENC_STEP_BACK 3519 ext/mbstring/oniguruma/regexec.c 	pre_end = ONIGENC_STEP_BACK(reg->enc, str, pre_end, 1);