int H3_EXPORT()

in src/h3lib/lib/h3Index.c [461:492]

• 27 lines of code
• 7 McCabe index (conditional complexity)

int H3_EXPORT(uncompact)(const H3Index* compactedSet, const int numHexes,
                         H3Index* h3Set, const int maxHexes, const int res) {
    int outOffset = 0;
    for (int i = 0; i < numHexes; i++) {
        if (compactedSet[i] == 0) continue;
        if (outOffset >= maxHexes) {
            // We went too far, abort!
            return -1;
        }
        int currentRes = H3_GET_RESOLUTION(compactedSet[i]);
        if (!_isValidChildRes(currentRes, res)) {
            // Nonsensical. Abort.
            return -2;
        }
        if (currentRes == res) {
            // Just copy and move along
            h3Set[outOffset] = compactedSet[i];
            outOffset++;
        } else {
            // Bigger hexagon to reduce in size
            int numHexesToGen =
                H3_EXPORT(maxH3ToChildrenSize)(compactedSet[i], res);
            if (outOffset + numHexesToGen > maxHexes) {
                // We're about to go too far, abort!
                return -1;
            }
            H3_EXPORT(h3ToChildren)(compactedSet[i], res, h3Set + outOffset);
            outOffset += numHexesToGen;
        }
    }
    return 0;
}