- Boost-users - lists.boost.org

Re: [Boost-users] serialization-lib add user info to XML format
by Eduardo Ferro Aldama 14 Jul '06

14 Jul '06

Hi! Thank very much for the help I am study the lib implementation, and trying to extend xml_oarchive (as you suggest)... Bye >I don't know that I can offer you a good solution. But here is what I can >come up with. > >First a couple of relevant facts about the serialization library. > >a) generally it saves in the archive only that information absolutely >required >to be able to recover the data. This is basad on design/efficiency >considerations. > >b) In some cases it stores "optional" information. That it is, the archive >may be written to save and recover this information. Normally these >are just stubbed out as no ops. > >c) In xml archives, information about object and class id and their >references is included in the xml. I'm don't remember whether its done >in the "optional" types or not. > >c) class name was not considered as one of these optional types > i) it wasn't deemed necessary > ii) it is not always available. Many types (e.g. primitives) are >serialized >without calling the library code. For these cases the "optional" data >is not called. > >So back to your situation. > >What is really needed for you is the following: > >a) some sort reflection for C++ so that you can write something like >t.name(). >b) derive from xml_oarchive to invoke t.name() and insert it into >the xml stream output. Examples of deriving from one archive >type to produce another are in the documentation. > >So the problem is "reduced" to making/finding something like t.name() >which returns a text string which can be inserted into the output stream. > >This already exists on one form - the RTTI implementation uses >type_id(t).name to return a pointer to a name. This may be sufficient >for your needs. The only problem with it is that > >a) the name will be mangled to a unique C++ name. This may not always >be user friendly. >b) the name will be mangled differently for each compiler. > >If you can work with the above limitations - perhaps by massaging the >mangled name to something readable - this can probably be made to work >for you. > >If not - you can use the name passed by BOOST_CLASS_EXPORT which >was "invented" to address the issues above. The only problem is that >BOOST_CLASS_EXPORT might not bedefined for all your types. > >You should have enough here to craft a solution to your problem. > >Good Luck > >Robert Ramey > Ce message ?lectronique et tous les fichiers attach?s sont confidentiels et destin?s exclusivement ? l'usage de la personne ? laquelle ils sont adress?s. Si vous n'?tes pas le destinataire de ce message, merci d'avertir ou de le retourner ? son ?metteur et d?truire ce message ?lectronique et tous les fichiers attach?s de votre syst?me informatique. La publication, l'usage, la distribution, l'impression ou la copie non autoris?e de ce message et des attachements qu'il contient sont strictement interdits. This e-mail and any attachment are confidential and intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient, please telephone or email the sender and delete this message and any attachment from your system. Unauthorized publication, use, dissemination, forwarding, printing or copying of this e-mail and its associated attachments is strictly prohibited. Este correo electr?nico y todos los ficheros adjuntos son confidenciales y destinados exclusivamente al uso de la persona a la cual han sido remitidos. Si Usted no es el destinatario del mensaje, agradecemos advierta al remitente y elimine el mensaje y sus adjuntos de su sistema. La publicaci?n, distribuci?n, impresi?n o copia no autorizada de este mensaje y de sus adjuntos queda estrictamente prohibida.

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Installation on Macintosh
by John Christopher 14 Jul '06

14 Jul '06

Hello I am trying to install boost on a macintosh (Tiger). I downloaded the boost-jam-3.1.13-1-macosxppc.tgz file and uncompressed it in a folder: /Developer/Libraries/boost there I installed bjam and in the Terminal I typed: ./bjam "-sTOOLS=darwin" install everything things run smoothly until I get a lot of error messages like: ...skipped <@boost!include!boost-1_33_1!boost!wave!util>symbol_table.hpp for lack of <directory-grist>/usr/local/include/boost-1_33_1/boost/wave/util... ...skipped <@boost!include!boost-1_33_1!boost!wave!util>time_conversion_helper.hpp for lack of <directory-grist>/usr/local/include/boost-1_33_1/boost/wave/util... ...skipped <@boost!include!boost-1_33_1!boost!wave!util>transform_iterator.hpp for lack of <directory-grist>/usr/local/include/boost-1_33_1/boost/wave/util... ...skipped <@boost!include!boost-1_33_1!boost!wave!util>unput_queue_iterator.hpp for lack of <directory-grist>/usr/local/include/boost-1_33_1/boost/wave/util... and the installation process ends with ...failed updating 8 targets... ...skipped 3649 targets... ...updated 709 targets... Any idea on what I am doing wrong? Thanks in advance

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Re: [Boost-users] Macro to contruct/allocate a shared_ptr?
by Perepelitsa Roman 14 Jul '06

14 Jul '06

> Thanks Roman. > > so is this how i would use your implementation? > > boost::shared_ptr<Test> t = newptr<int, char, std::string>(1, 'a', "hello"); > > that is getting a lot closer to what i need. and is far better that a > MACRO. declaring the types may annoying however. > > the good thing about this approach it that is will also be exception > safe: ie i dont need to declare a variable for the shared_ptr. and > will be cleaned up if g() fails > > // exception safe > fn(newptr<int, char, std::string>(1, 'a', "hello"), g()); You can omit all but the first template parameters because they can be deduced by compiler. shared_ptr<Test> t = newptr<Test>(1, 'a', "hello"); which is equivalent to shared_ptr<Test> t = shared_ptr<Test>(new Test(1, 'a', "hello")); HTH, Roman Perepelitsa.

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Re: [Boost-users] Macro to contruct/allocate a shared_ptr?
by David Klein 14 Jul '06

14 Jul '06

[snip] > I just have a problem with having the user manage the memory. > ie I'd rather do the following: > > shared_ptr<Test> p(1, 'a', "hello"); > or: > shared_ptr<Test> p = newptr<Test>(1, 'a', "hello"); > > instead of: > > shared_ptr<Test> p(new p(1, 'a', "hello")); > > but i guess that's a limitation of the language. to get hi, have a look at shared_new.zip in the vault. http://tinyurl.com/khd8v -- HTH dave

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library to workig with ip-addresses & ranges
by Alex Ott 14 Jul '06

14 Jul '06

Hallo all Is anybody knows a library to manipulate IP-addresses and their ranges. for example, to look ip address N.N.N.N in network specified by X.X.X.X/27, etc. -- With best wishes, Alex Ott Jet Infosystems, Head of software development group, MBA +7 (495) 411 76 01 http://www.jetsoft.ru/

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bug in documentation
by Ovanes Markarian 14 Jul '06

14 Jul '06

Hi! there is currently a bug in boost::lambda documentation ( <http://www.boost.org/doc/html/lambda/s03.html> http://www.boost.org/doc/html/lambda/s03.html) Current version: template <class T> : public binary_function<T, T, T> struct plus { T operator()(const T& i, const T& j) const { return i + j; } }; should be: template <class T> struct plus : public binary_function<T, T, T> { T operator()(const T& i, const T& j) const { return i + j; } }; With Kind Regards, Ovanes

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problem building boost's bjam for boost-1.32.0 on solaris with gcc
by William Deegan 14 Jul '06

14 Jul '06

Greetings, Here's whats happening: bash ./build.sh ### ### Using 'gcc' toolset. ### rm -rf bootstrap.gcc mkdir bootstrap.gcc gcc -o bootstrap.gcc/jam0 command.c compile.c execnt.c execunix.c execvms.c expand.c filent.c fileos2.c fileunix.c filevms.c glob.c hash.c hdrmacro.c headers.c jam.c jambase.c jamgram.c lists.c make.c make1.c newstr.c option.c parse.c pathunix.c pathvms.c regexp.c rules.c scan.c search.c subst.c timestamp.c variable.c modules.c strings.c filesys.c builtins.c pwd.c ./bootstrap.gcc/jam0 -f build.jam --toolset=gcc --toolset-root= build.jam:66: in module scope *** argument error * rule toolset ( name command : opt.out + : opt.define + : release-flags * : debug-flags * : linklibs * ) * called with: ( cc /eng/tools/cm/solaris/bin/gcc -m64 : -o : -D : -s -O : -g : ) * extra argument build.jam:39:see definition of rule 'toolset' being called This is run via script. If I run it interactively it builds fine. I'm trying to script up building boost+ many other third party packages for many platforms. Any idea why it fails when run via a script? Thanks, Bill

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boost regex seg fault, can't run a single example....
by paulo.fernando.silva＠sapo.pt 13 Jul '06

13 Jul '06

Greetings I've just emerged (I'm using gentoo) boost, once using bjam and another time without it. In both cases (not that it could make a difference) I just can't get the boost_regex to work. It blows... After compiling a few examples (captures_example, and grep) in both my home and work pc. I get the same result... segmentation fault. While running captures_example in the line std::cout << " $" << i << " = \"" << what[i] << "\"\n"; After doing some debug, I was able to find only the consequence. (I didn't search that hard...) In sub_match.hpp:73 result.append(1, *i); the value of i is 0x1<address out of bounds>. the line match_results.hpp:123 supposly returns const boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> > &) @0x804ded8: {<std::pair<__gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string> >> = { first = {<std::iterator<std::random_access_iterator_tag, char, int, char const*, char const&>> = {<No data fields>}, _M_current = 0x1 <Address 0x1 out of bounds>}, second = {<std::iterator<std::random_access_iterator_tag, char, int, char const*, char const&>> = {<No data fields>}, _M_current = 0x804d067 "eeeeeeee"}}, matched = 111, m_captures = {ptr = 0x1}} strangely enough, in the debuger, after returning from line match_results.hpp:123 the execution jumps to match_results.hpp:125 and return return m_null; but the cpu registers don't change... the truth is that I get this Program received signal SIGSEGV, Segmentation fault. 0x0804a6d6 in boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> >::str ( this=0x804ded8) at sub_match.hpp:73 73 result.append(1, *i); for no apparent reason. Any ideas? I'm using gcc 4.1 in my home pc and gcc 3.3.6 in my office pc. PIII800MHz and PIV1.5GHz both with 512MB ram. ___________________________________________________________________ O SAPO já está livre de vírus com a Panda Software, fique você também! Clique em: http://antivirus.sapo.pt

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vector vs list speed test
by bringiton bringiton 13 Jul '06

13 Jul '06

I'm just wondering what your thoughts are on my findings. I need a container that meets the following: - forward iteration only - insert to end only - no random access - delete from any position - average size of list will be 64 items I would first say use list over vector. because no random access and delete from any position. I ran some performance tests, which proved otherwise. The test builds a list by inserting to end. And then removes all items from the front until size == 0. (note: removing from index [0] should provide worst case linear complexity for vector) Here are my finding for containers of size 64, 256 and 1024. first result uses vector, 2nd uses list. i ran the test in release mode in ms vc++ 6. Test build/remove 64 0.062 0.234 Test build/remove 256 0.422 0.938 Test build/remove 1024 5.844 3.75 - it seems vector is best for smaller lists. even at 256 items, the vector is twice as fast at building at contant time and deleting and worst case linear time. - is this strange behaviour? is my test correct or do i have a bug? - i am also curious to how this runs on other compilers (esp later version of ms vc++) For those curious, here is my code. feel free to pick at it ;) void TestVectBuildDelete(int redoCount, int listSize) { boost::timer t; for (int i = 0; i < redoCount; i++) { // build the list std::vector<int> vect; for (int j = 0; j < listSize; j++) { vect.push_back(j); //vect.insert(vect.begin(), j); //.push_front(j); } // remove all elements in list while (!vect.empty()) { vect.erase(vect.begin()); } } std::cout << t.elapsed() << std::endl; } void TestListBuildDelete(int redoCount, int listSize) { boost::timer t; for (int i = 0; i < redoCount; i++) { // build the list std::list<int> vect; for (int j = 0; j < listSize; j++) { vect.push_back(j); } // remove all elements in list while (!vect.empty()) { vect.pop_front(); } } std::cout << t.elapsed() << std::endl; } void Test() { std::cout << "Test build/remove 64" << std::endl; TestVectBuildDelete(10000, 64); TestListBuildDelete(10000, 64); std::cout << "Test build/remove 256" << std::endl; TestVectBuildDelete(10000, 256); TestListBuildDelete(10000, 256); std::cout << "Test build/remove 1024" << std::endl; TestVectBuildDelete(10000, 1024); TestListBuildDelete(10000, 1024); }

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boost windows installer problem
by Ovanes Markarian 13 Jul '06

13 Jul '06

Hello, is there any way to specify the proxy server to the installer provided by boost-consulting? At work I can access inet via some proxy server only. Now I have to rebuild the entire boost lib again... May be boost-consulting should offer big old monolithic single file installations for vc8.0 or vc7.1 for those who cannot easily access network and still require all libs. With Kind Regards, Ovanes Markarian

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