Function file_read

example/print_file/print_file_exceptions.cpp:189–198

Read size bytes from f into buf.

// Read size bytes from f into buf.
void file_read( FILE & f, void * buf, std::size_t size )
{
    std::size_t n = fread(buf, 1, size, &f);

    if( ferror(&f) )
        leaf::throw_exception(read_error, leaf::e_errno{errno});

    if( n != size )
        leaf::throw_exception(eof_error);
}