hi,
I am trying to transfer a C structure, say "struct stat" over the wire via
protobuf and ran into a strange issue. I define the message as:
message FileStat {
optional bytes stat = 1;
...
}
On the sender side, I fill in the data as the following (with C++ interface)
FileStat fs;
struct stat st = {}; // fill in data properly
fs.set_stat(&st, sizeof(struct stat)); // set the stat value
On the receiving end, I first verified the total message size matches what
I am expecting, then, I want to recover this structure from the "bytes"
field. However, first I want to check the exact size of this field, aka.
"stat".
so I print "fs.stat().size()"
I see this fs.stat() is defined as const string &, and suprisingly, the
size print out is ZERO.
I am assuming there will be "\0" in the buffer, so this should not be
treated as a regular C-string. However, in the case of "bytes" field, how
do I probably get the data out and cast it properly?
I tried direct casting, and it doesn't seem to get it correct:
thanks for help.
Oliver
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