i'm writing some client code at work to talk to a udp server we use for debugging. the server sends out the following c structure: 
typedef struct Net_LogMsgHdr {
   int32        magic;
   Net_LogMsgType    type;
   int32         nextLogChar;
   int32        logBufferSize;
   int32        length;
   int32        override;
   uint64        bootTS;
   uint64        pad;    
} Net_LogMsgHdr;

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i've got something like this set up on the client side: 
my $sock = IO::Socket::INET->new(
                 LocalAddr => '127.0.0.1:6300',
                 LocalPort => 6300,
                 Proto => 'udp',
                );
my $incoming;
while ($sock->recv($incoming, 65536)) {
   my ($magic, $type, $nextLogChar, $logBufferSize, $length, $override
+, $bootTS, $pad) = unpack "llllllQQ" , $incoming;

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which in theory should work, except my perl doesn't grok 64 bit integers. i know i can compile a version that does, but that's not a solution, since this has to be portable amongst our development machines here. i thought about bitshifting, but the camel book has the following warning: 
"Results on large (or negative) numbers may vary depending on the numb
+er of bits your machine uses to represent integers".

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My machine (of course) uses 32 bit integers. So there's no way that i know of to go from a 128bit chunk of network data to two 64bit uints (excluding unpack). any ideas? cpan modules? *shudder* regexes?

BlueLines

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In reply to pack() and non-64bit systems by BlueLines

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