Function zslParseRange

src/t_zset.cpp:519–553

Populate the rangespec according to the objects min and max. */

/* Populate the rangespec according to the objects min and max. */
static int zslParseRange(robj *min, robj *max, zrangespec *spec) {
    char *eptr;
    spec->minex = spec->maxex = 0;

    /* Parse the min-max interval. If one of the values is prefixed
     * by the "(" character, it's considered "open". For instance
     * ZRANGEBYSCORE zset (1.5 (2.5 will match min < x < max
     * ZRANGEBYSCORE zset 1.5 2.5 will instead match min <= x <= max */
    if (min->encoding == OBJ_ENCODING_INT) {
        spec->min = (long)min->m_ptr;
    } else {
        if (((char*)ptrFromObj(min))[0] == '(') {
            spec->min = strtod((char*)ptrFromObj(min)+1,&eptr);
            if (eptr[0] != '\0' || std::isnan(spec->min)) return C_ERR;
            spec->minex = 1;
        } else {
            spec->min = strtod((char*)ptrFromObj(min),&eptr);
            if (eptr[0] != '\0' || std::isnan(spec->min)) return C_ERR;
        }
    }
    if (max->encoding == OBJ_ENCODING_INT) {
        spec->max = (long)max->m_ptr;
    } else {
        if (((char*)ptrFromObj(max))[0] == '(') {
            spec->max = strtod((char*)ptrFromObj(max)+1,&eptr);
            if (eptr[0] != '\0' || std::isnan(spec->max)) return C_ERR;
            spec->maxex = 1;
        } else {
            spec->max = strtod((char*)ptrFromObj(max),&eptr);
            if (eptr[0] != '\0' || std::isnan(spec->max)) return C_ERR;
        }
    }

    return C_OK;
}

/* ------------------------ Lexicographic ranges ---------------------------- */