Method _patchArray

Fleece/Core/JSONDelta.cc:374–412

    inline void JSONDelta::_patchArray(const Array* NONNULL old, const Dict* NONNULL delta) {
        // Array: Incremental update
        _decoder->beginArray();
        uint32_t index = 0;
        const Value *remainder = nullptr;
        for (Array::iterator iOld(old); iOld; ++iOld, ++index) {
            auto oldItem = iOld.value();
            char key[10];
            sprintf(key, "%d", index);
            auto replacement = delta->get(slice(key));
            if (replacement) {
                // Patch this array item:
                _apply(oldItem, replacement);
            } else {
                strcat(key, "-");
                remainder = delta->get(slice(key));
                if (remainder) {
                    break;
                } else {
                    // Array item is unaffected:
                    _decoder->writeValue(oldItem);
                }
            }
        }

        if (!remainder) {
            char key[10];
            sprintf(key, "%d-", old->count());
            remainder = delta->get(slice(key));
        }
        if (remainder) {
            // Remainder of array is replaced by the array from the delta:
            auto remainderArray = remainder->asArray();
            throwIf(!remainderArray, InvalidData, "Invalid array remainder in delta");
            for (Array::iterator iRem(remainderArray); iRem; ++iRem)
                _decoder->writeValue(iRem.value());
        }
        _decoder->endArray();
    }


    // Does this delta represent a deletion?