Resending because of mailer problems... Hi all, While trying to implement the latest changes of the spec I have the following comments: 1. we added the option for a const correct buffer class to the spec, shouldn't the same be allowed for the iovec class (i.e. a const correct version of the iovec type) 2. I'ld suggest to change the saga::file::read and saga::file::write API functions as follows: saga::ssize_t read(saga::mutable_buffer, saga::ssize_t bytes = 0) saga::ssize_t write(saga::const_buffer, saga::ssize_t bytes = 0) The rationale behind this is that the buffer already contains a size, which by default could be used for the operation (if the 'bytes' parameter is zero). In C++ this would allow to simplify the code significantly. i.e. saga::file f(...); char cb[100]; f.read(buffer(cb)); // read 100 char's std::vector<double> v(20); f.read(buffer(v, 10)); // read 10 doubles Or std::vector<int> vi; // fill vi ... f.write(buffer(vi)); // write all elements of vi Etc. Regards Hartmut