- Boost-users - lists.preview.boost.org

BigInteger equivalent
by Noel Yap 26 Apr '06

26 Apr '06

Is there anything in boost (or elsewhere) similar to Java's BigInteger? Thanks, Noel

4 4

Re: [Boost-users] BigInteger equivalent
by Drumheller, Michael 26 Apr '06

26 Apr '06

>>> Message: 4 >>> Date: Tue, 25 Apr 2006 19:26:16 -0700 (PDT) >>> From: Cromwell Enage <sponage(a)yahoo.com> >>> Subject: Re: [Boost-users] BigInteger equivalent >>> To: boost-users(a)lists.boost.org >>> Message-ID: <20060426022616.60087.qmail(a)web53912.mail.yahoo.com> >>> Content-Type: text/plain; charset=iso-8859-1 >>> >>> --- Noel Yap wrote: >>> > Is there anything in boost (or elsewhere) similar to Java's >>> > BigInteger? >>> See the GNU Multi-Precision library (GMP) <<http://www.swox.com/gmp/>> I have not used it, so I cannot really speak to it. I am merely aware of its existence and thought I'd point it out. FWIW google("gnu", "gmp") --> 1,050,000 hits. Michael Drumheller

1 0

Re: [Boost-users] Boost-users Digest, Vol 886, Issue 6
by Wu Yinghui, Freddie 26 Apr '06

26 Apr '06

Hi, boost-users-request(a)lists.boost.org wrote: > Thing is, the only iterator interface to multi_array returns a reference > to the nested containers. Thus, to iterate over all sub-elements, I'm > forced to have 7-11 nested for-loops to iterate over the entire thing. > > - Greg Link You might wanna take a look at creating a 1-dimensional view of your multi-dimensional container. It is described in multi_array documentation that you can create subranges/views of a multi_array (hint: reshape() function template), which may be helpful. Cheers, Freddie -- Wu Yinghui, Freddie Research & Development Software Engineer Volume Interactions Pte Ltd 1 Kim Seng Promenade, #12-01 Great World City East Tower Singapore 237994 Tel: +65 62226962 (Ext 216) Fax: +65 62226215 Email: yhwu(a)volumeinteractions.com URL: http://www.volumeinteractions.com Important: This message is intended for the recipient(s) addressed above. It contains privileged and confidential information. If you are not the intended recipient, please notify the sender immediately by replying to this message and then delete it from your system. You must not read, copy, use, or disseminate this communication in any form. Thank you.

1 0

[regex] converting a wildcard expr into a regex
by Christoph 25 Apr '06

25 Apr '06

Hi, I would like to implement matching of SQL-LIKE clauses by Boost regex. I need to convert strings like "HEL_LO%" into something regex("HEL.LO.*"). As the LIKE-string might contain characters like '.', '+* etc these need to be escaped: "HE+LO%" -> regex("HE\+LO.*"). Another example are shell globs where * and ? take the place of % and _. I have not found an obvious and easy way (besides doing the replacing and escaping by hand) of how to do that using Boost.Regex. Is there any support for this problem present in Boost? Thank you and best regards Christoph

2 1

serialization: deserialization issue
by Olivier Destrebecq 25 Apr '06

25 Apr '06

I have a base class and some derived class. Each class declare a serialize method. each derived class begin its serialization method by: inArchive & BOOST_SERIALIZATION_BASE_OBJECT_NVP (FetchableMetadataObject); to declare the inheritance relationship then they serialize their own members: inArchive & BOOST_SERIALIZATION_NVP(xxxx); I want the base class to declare a serialize as XML method that will return a string containing the serialized XML representation std::string baseClass::SerializeAsXML() const { return baseClass::saveToXML(this); } saveToXML is a static method on the baseClass std::string baseClass::saveToXML(baseClass const* inObject) { std::ostringstream returnValue; boost::archive::xml_oarchive archive(returnValue); archive << boost::serialization::make_nvp("root", inObject); return returnValue.str(); } The serialization appear to work as when the object are printed for the unit test, i pass the xml serialized data and it contains the data that i expect it to contain. The problems start when i want to reload the data into objects I declared a constructor on the base class and on the derived class that accept the XML string and then rebuild the object using that string (is that a correct design decision?) baseClass::MetadataObject(std::string const &serializedObject) { baseClass::LoadFromXML(serializedObject, this); } derivedClass::MetadataObject(std::string const &serializedObject) { baseClass::LoadFromXML(serializedObject, this); } LoadFromXML is a static method on the base class void baseClass::LoadFromXML(std::string const &inXMLString, baseClass *inObject) { std::istringstream inputStream (inXMLString); // open the archive assert(inputStream.good()); boost::archive::xml_iarchive inputArchive(inputStream); // restore the schedule from the archive inputArchive >> boost::serialization::make_nvp("root", inObject); } The serialize method is not even called when de-serializing the object. So i assume i missed something:-) Any help appreciated, Olivier Destrebecq olivierd(a)real.com

1 0

serialization auto_ptr std::string
by Olivier Destrebecq 25 Apr '06

25 Apr '06

I'm including serialization in my library and am running into problems. One of my class include an std::auto_ptr <std::string> I'm including #include <boost/serialization/string.hpp> to handle the string serialization i downloaded the serialization example for an auto_ptr and modified it to allow for XML serialization (see end of email). But when i compile get the following error saying: error: 'struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >' has no member named 'serialize' If i replace the std::auto_ptr <std::string> with just std::string it works, so i assume something is wrong with my auto_ptr code Feel free to ask me more question or send me beginners advice as i'm just beginning with BOOST. Thanks auto_ptrSerialization.hpp: #include <list> #include <memory> #include <fstream> #include <boost/config.hpp> // std::autoptr inteface wrong in dinkumware #include <boost/detail/workaround.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/detail/workaround.hpp> #include <boost/serialization/split_free.hpp> namespace boost { namespace serialization { ///////////////////////////////////////////////////////////// // implement serialization for auto_ptr<T> // note: this must be added to the boost namespace in order to // be called by the library template<class Archive, class T> inline void save( Archive & ar, const std::auto_ptr<T> &t, const unsigned int file_version ){ // only the raw pointer has to be saved // the ref count is rebuilt automatically on load T *objectPtr = t.get(); ar << BOOST_SERIALIZATION_NVP(objectPtr); } template<class Archive, class T> inline void load( Archive & ar, std::auto_ptr<T> &t, const unsigned int file_version ){ T *objectPtr; ar >> BOOST_SERIALIZATION_NVP(objectPtr); // note that the reset automagically maintains the reference count #if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1) t.release(); t = std::auto_ptr<T>(objectPtr); #else t.reset(objectPtr); #endif } // split non-intrusive serialization function member into separate // non intrusive save/load member functions template<class Archive, class T> inline void serialize( Archive & ar, std::auto_ptr<T> &t, const unsigned int file_version ){ split_free(ar, t, file_version); } } // namespace serialization } // namespace boost Best, Olivier Destrebecq olivierd(a)real.com

2 2

Re: [Boost-users] BGL: filtered graph question
by Grégoire Dooms 25 Apr '06

25 Apr '06

boost-users-request(a)lists.boost.org wrote: > Date: Tue, 25 Apr 2006 08:54:12 +0200 > From: Sebastian Weber <sebastian.weber(a)physik.tu-darmstadt.de> > Subject: [Boost-users] BGL: filtered graph question > > Hello everybody! > > I use the filtered_graph framework to restrict a BFS visit to a small > region on my graph. BUT, I provide the starting vertex to the BFS > routine by a vertice_descriptor of the underlying/unfiltered graph. Of > course, this vertice descriptor matches the predicate. My code compiles > fine, but I started to ask myself if this actually behaves correct? > > As I could not find a hint within the docs, does someone know? > > A quick look at the code tells that it is perfectly fine. The type of vertex_descriptor is the same as for the underlying graph and the vertex iterator is simply a filter_iterator using the provided predicate. Best, -- Grégoire Dooms

3 4

Boost::program_optiions - Defining The Config File As A Cmdline Parameter
by Adam Hartshorne 25 Apr '06

25 Apr '06

Hi All, I want to be able to do the following using the Boost::program_options library. 1) Parse a set of command line options in a standard way (I know how to achieve this). 2) Have an command line option which is "get other command line options from a config file defined as the argument to this option. The example multiple_sources is very close to the sort of thing I want, however in that example the config file is hard coded. I want the user to interactively set the config file at runtime. If I try simply putting the following lines in the set of if statements my program crashes (I know this is still hard coding the cfg file, but it was a first attempt before I made it more general), if ((vm.count("input-file")) { ifstream ifs("multiple_sources.cfg"); store(parse_config_file(ifs, config_file_options), vm); notify(vm); } Any help would be much appreciated, Adam

3 3

Boost::program_options - Problem Compiling Examples On Linux Box
by Adam Teasdale Hartshorne 25 Apr '06

25 Apr '06

Hi All, I am having some trouble compiling the examples for the program_options library on a linux box. I following is the output of my attempt to try and compile the first.cpp example. I obviously understand that error message is due to the compiler been unable to see the appropriate function in the given libraries. I therefore assume I should be including so other libraries, but I don't know which ones are needed. Interestingly I can get the simple_ls.cpp example to compile and function ok. Any help would be much appreciated, Adam g++ -c -pipe -Wall -W -O2 -pipe -m64 -fexceptions -D_REENTRANT -DQT_NO_DEBUG -DQT_THREAD_SUPPORT -DQT_SHARED -I/usr/lib64/qt-3.3/mkspecs/default -I. -Idcs/improc2/adam/boost_1_33_1/ -I/usr/lib64/qt-3.3/include -I.moc/ -o .obj/first.o first.cpp g++ -o cmdLineTest .obj/first.o -L/usr/lib64/qt-3.3/lib -L/usr/X11R6/lib64 -L/dcs/improc2/adam/boost_1_33_1/stage/lib/ -lboost_filesystem-gcc-d-1_33_1 -lboost_program_options-gcc-1_33_1 -lqt-mt -lXext -lX11 -lm -lpthread .obj/first.o(.text+0x57): In function `main': : undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' .obj/first.o(.gnu.linkonce.t._ZNK5boost15program_options25basic_command_line_parserIcE3runEv+0x5): In function `boost::program_options::basic_command_line_parser<char>::run() const': : undefined reference to `boost::program_options::common_command_line_parser::run() const' .obj/first.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcEC1EiPPc+0x42): In function `boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char**)': : undefined reference to `boost::program_options::common_command_line_parser::common_command_line_parser(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)' collect2: ld returned 1 exit status make: *** [cmdLineTest] Error 1

2 2

program_options: iterate variable_map
by Stephan Stiglmayr 25 Apr '06

25 Apr '06

Hello! I'm looking for a way to "iterate" through a variable_map after the command line options were stored, in order to print out all the options, or all with newly values. I know that you can test if a specific options was read with the "count()" method, but this is cumbersome. Is there a possiblity to do that? Regards, Stephan.

4 8