Not sure what is being asked, but simply having a bytes foo = 1;
will cause the presence of the field, the length of the field, and the contents of the field to be encoded into the resulting binary representation (as <tagid 1> <length varint> <length bytes>). However enforcing maximum lengths/other data validation is up to the application layer, not the serialization layer. At least with the way protobufs are designed. On Mon, Oct 6, 2014 at 8:09 PM, Marc Gravell <marc.grav...@gmail.com> wrote: > You cannot. What you describe is not what protobuf offers. > On 7 Oct 2014 00:55, "RPMASA" <rudram...@gmail.com> wrote: > >> Hi, >> >> I have structured binary file specifying size of each element in bytes. >> How can I mentioned them in ptoto file? >> >> >> >> No. Description Data Value Variable Type Number of bytes 1 A1 0=unuse, >> 1=use byte 1 2 A2 0=unuse, 1=use byte 1 3 A3 false=unuse, true=use byte >> 1 2-2. Object[200] - this object can contains up to 200 times >> No. Description Data Value Variable Type Number of bytes 1 B1 1 >> to 200 int 4 2 B2 string 40 3 B3 string 52 4 B4 0=unuse, 1=use >> byte 1 5 B5 YYYYMMDD string 16 6 B6 string 30 7 B7 0=unuse, 1=use >> byte 1 >> >> >> In above example how can I define that fields B2 is string and can have >> up to 40 bytes of data? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Protocol Buffers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to protobuf+unsubscr...@googlegroups.com. >> To post to this group, send email to protobuf@googlegroups.com. >> Visit this group at http://groups.google.com/group/protobuf. >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to protobuf+unsubscr...@googlegroups.com. > To post to this group, send email to protobuf@googlegroups.com. > Visit this group at http://groups.google.com/group/protobuf. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at http://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
