[Rock-dev] Strange size of some packed std::string

[Janosch Machowinski]

I digged further into this issue,
between gcc versions the implementation
of std::string changed, resulting in this difference
in size. The 'typelib' format is not affected from
this. However the isSame call is affected. As this
seems to be a typelib issue then I switch to a
issue on github...
Greetings
     Janosch

Am 16.05.2017 um 17:13 schrieb Janosch Machowinski:
> Hey,
> we got some strange log files, were the size of
> SOME std::string containers is reported to be 8 Bytes.
> The size of the std::string container on the host system is
> 32 byte.
>
> Log :
> compound /base/samples/RigidBodyState_m [416] {
>         (+0) compound /base/Time [8] {
>           (+0) sint(8) (/int64_t) microseconds
>         }; time
>         (+8) container /std/string</int8_t> (8) sourceFrame
>         (+16) container /std/string</int8_t> (8) targetFrame
>         (+24) compound /wrappers/Matrix</double,3,1> [24]
>
> Host :
>         (+0) compound /base/Time [8] {
>           (+0) sint(8) (/int64_t) microseconds
>         }; time
>         (+8) container /std/string</int8_t> (32) sourceFrame
>         (+40) container /std/string</int8_t> (32) targetFrame
>
> The c++ replay fails to replay these streams, while the
> ruby version seems to be able to replay the streams.
> Any idea what might be going on here ?
>       Janosch
>
>


-- 
  Dipl. Inf. Janosch Machowinski
  SAR- & Sicherheitsrobotik

  Universität Bremen
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