Re: New egg: mdh

[siiky]

On 5/18/21 11:29, felix.winkelmann@bevuta.com wrote:
> Hi!
>
> This is to announce the "mdh" egg, an interface to the C++ API of O'Kane's
> MUMPS database. The concepts behind it were presented by Luke at the
> CHICKEN Coding Jam and produced quite some interest. MDH is a very
> easy to use multidimensional key-value store. The code is included in
> the egg, the only external dependency is libpcre.
>
> Documentation can be found here: http://wiki.call-cc.org/eggref/5/mdh
> (or of course at api.call-cc.org).
>
> Note that this is a first release. It seems to work fine, but has not been
> heavily tested with regards to scalability and performance. There are a few
> parameters than can be tweaked once there exists more experience with
> using this database.
>
> Many thanks to Luke K. for inspiration and fruitful discussions regarding
> a suitable Scheme API.
>
>
> felix

Hey Felix,

Thanks for this, the talk got me interested too!

Building, testing, and installing all worked out of the box, but I got 
these two warnings while compiling (in red even though they're warnings):

   /home/siiky/.local/bin/csc -host -D compiling-extension -J -s 
-regenerate-import-libraries -setup-mode -I 
/home/siiky/.cache/chicken-install/mdh -C 
-I/home/siiky/.cache/chicken-install/mdh -C -w -C -DNATIVE_SHARED -C -I. 
-C -D_FILE_OFFSET_BITS=64 -C -D_LARGEFILE_SOURCE -c++ -C -D_MDH_ -L 
-lpcre mdh.scm /home/siiky/.cache/chicken-install/mdh/arith.o 
/home/siiky/.cache/chicken-install/mdh/bifs.o 
/home/siiky/.cache/chicken-install/mdh/bstring.o 
/home/siiky/.cache/chicken-install/mdh/btree.o 
/home/siiky/.cache/chicken-install/mdh/globalb.o 
/home/siiky/.cache/chicken-install/mdh/interp.o 
/home/siiky/.cache/chicken-install/mdh/libmpscpp.o 
/home/siiky/.cache/chicken-install/mdh/lock.o 
/home/siiky/.cache/chicken-install/mdh/pm.o 
/home/siiky/.cache/chicken-install/mdh/stem.o 
/home/siiky/.cache/chicken-install/mdh/strmanip.o 
/home/siiky/.cache/chicken-install/mdh/sym.o 
/home/siiky/.cache/chicken-install/mdh/sysfunc.o 
/home/siiky/.cache/chicken-install/mdh/bmgsubs.o -o 
/home/siiky/.cache/chicken-install/mdh/mdh.so
/home/siiky/.cache/chicken-install/mdh/globalb.cpp: In function ‘Mglobal’:
/home/siiky/.cache/chicken-install/mdh/globalb.cpp:163:24: warning: 
‘strncmp’ specified bound [18446744073709551614, 18446744073709551615] 
exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
  163 |             if (strncmp(( const char  * ) hold,( const char  * 
) bd,j)!=0 ||
      |                        ^
/home/siiky/.cache/chicken-install/mdh/bifs.cpp: In function ‘zfcn’:
/home/siiky/.cache/chicken-install/mdh/bifs.cpp:119:12: warning: 
‘strncpy’ specified bound 18446744073709551615 exceeds maximum object 
size 9223372036854775807 [-Wstringop-overflow=]
  119 |     strncpy( (char *) fcnName, (const char *) &v1d[2],i-2);
      |            ^

(also available here[0])

My C-fu isn't what it used to be, and my C++-fu is worse yet, but I'm 
wondering if this couldn't be a hint for a source of problems to 
someone. I think I got all the relevant output, but if you want more 
just let me know.

Got no warnings on my RBPi4.

[0]: https://paste.rs/KaU

Thanks,
André Sá