Function vectorFromBlobValue

src/sqlite-vector.cpp:53–81

}

vec_ptr vectorFromBlobValue(sqlite3_value *value, const char **pzErrMsg) {

    int size = sqlite3_value_bytes(value);
    char header;
    char type;

    if (size < (2)) {
        *pzErrMsg = "Vector blob size less than header length";
        return nullptr;
    }

    const void *pBlob = sqlite3_value_blob(value);
    memcpy(&header, ((char *)pBlob + 0), sizeof(char));
    memcpy(&type, ((char *)pBlob + 1), sizeof(char));

    if (header != VECTOR_BLOB_HEADER_BYTE) {
        *pzErrMsg = "Blob not well-formatted vector blob";
        return nullptr;
    }

    if (type != VECTOR_BLOB_HEADER_TYPE) {
        *pzErrMsg = "Blob type not right";
        return nullptr;
    }

    int numElements = (size - 2) / sizeof(float);
    float *vec = (float *)((char *)pBlob + 2);
    return vec_ptr(new vector<float>(vec, vec + numElements));
}

vec_ptr vectorFromRawBlobValue(sqlite3_value *value, const char **pzErrMsg) {