ATL / WTL / STL

Re: Using microsoft STL and STLport in same project

1-Jul-09 4:30

Vishal Kumar Soni wrote:
Those error have been removed with this setting but now another error is coming as following:

No - you misunderstood me. I suggested using cl /p to generate a pre-processed version of your file to see what code the compiler was really seeing. That gets rid of the error you were seeing because the compiler isn't run - so object code isn't generated for that file (AgencyObject.cpp, I guess).

So. If you do cl /p AgencyObject.cpp, you'll get a file called AgencyObject.i. This will contain the code that the pre-processor produces. All comments have been removed, all macros have been substituted with their definitions. In this file, you can see what the compiler sees when it produces the error messages about allocator_type and value_type and hopefully you'll realise why the error's happening.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Vishal Kumar Soni1-Jul-09 5:07

Vishal Kumar Soni

1-Jul-09 5:07

In AgencyObject.cpp file, I included CStdSting.h. So I checked the AgnecyObject.i file and macros are coming like following

template<typename CT>
class _SS : public stlp_std::basic_string<CT>
{

typedef stlp_std::basic_string<CT> MYBASE;

typedef _SS<CT> MYTYPE;
typedef MYBASE::const_pointer PCMYSTR;
typedef MYBASE::pointer PMYSTR;
typedef MYBASE::iterator MYITER;
typedef MYBASE::const_iterator MYCITER;
typedef MYBASE::size_type MYSIZE;
typedef MYBASE::value_type MYVAL;
typedef MYBASE::allocator_type MYALLOC;

VS8 is giving the error for last 2
typedef MYBASE::value_type MYVAL;
typedef MYBASE::allocator_type MYALLOC;

Regards,
Vishal Soni

Re: Using microsoft STL and STLport in same project

Stuart Dootson1-Jul-09 5:37

Re: Using microsoft STL and STLport in same project

1-Jul-09 5:37

I'm guessing you're also getting error message something like this?

a.cpp(18) : warning C4346: 'stlp_std::basic_string<_CharT,_Traits,_Alloc>::value_type' : dependent name is not a type
        prefix with 'typename' to indicate a type
        a.cpp(20) : see reference to class template instantiation '_SS<CT>' being compiled

If so, it's a shame you didn't mention those before, 'cause they explain everything - VC++ used to be less standards compliant - it would presume that was the name of a type, where it shouldn't have done. The error message says what's needed - the declaration of allocator_type and value_type need to have typename added to the type being aliased, like this:

typedef typename MYBASE::value_type	 MYVAL; 
typedef typename MYBASE::allocator_type	MYALLOC;

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Vishal Kumar Soni1-Jul-09 6:02

Vishal Kumar Soni

1-Jul-09 6:02

Thanks Stuart. It is workiing now.
I did not cheked the warning message before you pointed me.I was ignoring all warnings.
I was using same CStdString.h file in VC6 from long time.

Thanks again. Now I will try to use both Stlport and Microsoft STL in same project.

Regards,
Vishal Soni

Re: Using microsoft STL and STLport in same project

AVIJIT NANDI7-Feb-10 19:53

AVIJIT NANDI

7-Feb-10 19:53

I am adding to this chain I find issue is related to this.

Even though I am able to compile and link the project project using STLPort library. My code crashes when it tries to access a std::vector. The vector has been initialized using STLport STL.

when I initialized the vector it used stlp_std

MYApp.exe!stlp_std::vector<external_Lib::customString,stlp_std::allocator<external_Lib::customString> >::_M_insert_overflow(external_Lib::customString* __pos=0x075cc4d0, const external_Lib::customString & __x={...}, const stlp_std::__false_type & __formal={...}, unsigned int __fill_len=1, bool __atend=true) Line 161 + 0x38 bytes C++

when the 3rd party library code (built with Visual studio STL) access the vector it uses the Visual studio stl (std::vector) and hence crashes.

MYApp.exe!std::vector<external_Lib::customString,std::allocator<external_Lib::customString > >::begin() Line 633 + 0x13 bytes C++

Is there any solution to fix this?

Re: Using microsoft STL and STLport in same project

AVIJIT NANDI7-Feb-10 20:04

AVIJIT NANDI

7-Feb-10 20:04

I am adding to this chain as I find my issue is related to this.

Even though I am able to compile and link the project project using STLPort library. My code crashes when it tries to access a std::vector. The vector has been initialized using STLport STL.

when I initialized the vector it used stlp_std

MYApp.exe!stlp_std::vector<external_Lib::customString,stlp_std::allocator<external_Lib::customString> >::_M_insert_overflow(external_Lib::customString* __pos=0x075cc4d0, const external_Lib::customString & __x={...}, const stlp_std::__false_type & __formal={...}, unsigned int __fill_len=1, bool __atend=true) Line 161 + 0x38 bytes C++

when the 3rd party library code (built with Visual studio STL) access the vector it uses the Visual studio stl (std::vector) and hence crashes.

MYApp.exe!std::vector<external_Lib::customString,std::allocator<external_Lib::customString > >::begin() Line 633 + 0x13 bytes C++

Is there any solution to fix this?

Re: Using microsoft STL and STLport in same project

Vishal Kumar Soni9-Feb-10 17:46

Vishal Kumar Soni

9-Feb-10 17:46

Are you STL port header files?
This thing happens when there is something mix up of STL port library and microsoft library.

Regards,
Vishal

Re: Using microsoft STL and STLport in same project

AVIJIT NANDI9-Feb-10 18:45

AVIJIT NANDI

9-Feb-10 18:45

Actually my application uses STLPort libraries. So I am using the headers from STLPort 5.1 too. The 3rd party library (.lib) which I am trying to use in my application is using Visual studio STL. let me try to explain the problem.

This 3rd Party library has class OutputOptions which has a private member std::vector<string> _names. This class also has a public inline function addNames(string &name) {_names. pushback (name)}. In my application I have a OutputOptions object and I add names to this OutputOptions object using the inline function.[I can add the names, no issues in adding]. see the call stack at this point it uses stlp_std (stlport)

MYApp.exe!stlp_std::vector<3rdPartyLib::String,stlp_std::allocator<3rdPartyLib::String > >::push_back(const 3rdPartyLib::String & __x={...}) Line 368 C++
MYApp.exe!OutputOptions::addNames(const 3rdPartyLib::String & value={...})

But When the 3rd party library tries to access the _names vector using constant iterator the vector is corrupted and the application crashes. See the call stack when it tries to access the _names vector. it uses std::vector. I think that's the problem.

MYApp.exe!std::_Iterator_base::_Adopt(const std::_Container_base * _Parent=0x0190a3f4) Line 164 C++
MYApp.exe!std::_Vector_const_iterator<3rdPartyLib::String,std::allocator<3rdPartyLib::String> >::_Vector_const_iterator<3rdPartyLib::String,std::allocator<3rdPartyLib::String> >(3rdPartyLib::String * _Ptr=0x075c1bb8, const std::_Container_base * _Pvector=0x0190a3f4) Line 73 C++
MYApp.exe!std::vector<3rdPartyLib::String,std::allocator<3rdPartyLib::String> >::begin() Line 633 + 0x13 bytes C++

I don't know how to fix this.

-Avijit

Re: Using microsoft STL and STLport in same project

sbansal714-Sep-11 14:38

sbansal7

14-Sep-11 14:38

Hi Vishal,

I am also running into same errors, can you please let me know incase you got the linking error solution.

Thanks,
Sandeep

My codecvt (a.k.a. facet) never gets called.

John R. Shaw27-Jun-09 9:35

John R. Shaw

27-Jun-09 9:35

I have been at this all night and I am still no closer to a solution. Confused | :confused:

The problem is that utf16_codecvt methods never get called and, therefore, the result is wrong. I have search the net, but all I can find is examples of what is supposed to work. Unfortunately none of them has worked. I have also seen other posters, on the net, with the same problem, but no one gave them and answer to it.

I have tested to make sure that it has the facet (utf16_codecvt) and it does. So I see no reason why its virtual methods are never called. Instead it keeps calling the codecvt<wchar_t,char, mbstate> methods.

Any ideas?

class utf16_codecvt : public std::codecvt<char16_t, char16_t, std::mbstate_t>
{
    ...//
};

void MyTestFunc()
{
    ... //
    std::wifstream myFile;
    std::locale myLoc = std::locale(myFile.getloc(), new utf16_codecvt);
    myFile.imbue(myLoc);
    myFile.open(pFileName, std::ios::in | std::ios::binary);
    ... //
    myFile.read(bom_buffer, 1);
    ... //
}

The following link gives an example of the types of things I am trying to do.

April 01, 1999 - Unicode Files - P.J. Plauger http://www.ddj.com/cpp/184403638?pgno=1[^]

Signed, Very <blanking> tired. Sleepy | :zzz:

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: My codecvt (a.k.a. facet) never gets called.

Stuart Dootson28-Jun-09 23:37

Re: My codecvt (a.k.a. facet) never gets called.

28-Jun-09 23:37

From what I can tell, the C++ stream system presumes that files are sequences of bytes, not characters - even when you use wide streams - the 'wide' part of wide stream (AFAICT) indicates how the stream object interacts with C++, not the underlying file or whatever. Thus, your codecvt facet has to take in characters.

By changing the declaration of your codecvt facet to that shown below, I was able to get breakpoints in the replacement facet being set.

class utf16_codecvt : public std::codecvt<char16_t, char, std::mbstate_t>
{
   typedef std::codecvt<char16_t, char, std::mbstate_t> Base;
   typedef char16_t ElemT;
   typedef char ByteT;
   virtual result __CLR_OR_THIS_CALL do_in(std::mbstate_t& s,
      const ByteT *_First1, const ByteT *_Last1, const ByteT *& _Mid1,
      ElemT*_First2, ElemT* _Last2, ElemT *& _Mid2) const
   {	// convert bytes [_First1, _Last1) to [_First2, _Last)
      return Base::do_in(s, _First1, _Last1, _Mid1, _First2, _Last2, _Mid2);
   }

   virtual result __CLR_OR_THIS_CALL do_out(std::mbstate_t& s,
      const ElemT*_First1, const ElemT*_Last1, const ElemT*& _Mid1,
      ByteT*_First2, ByteT*_Last2, ByteT*& _Mid2) const
   {	// convert [_First1, _Last1) to bytes [_First2, _Last)
      return Base::do_out(s, _First1, _Last1, _Mid1, _First2, _Last2, _Mid2);
   }

   virtual result __CLR_OR_THIS_CALL do_unshift(std::mbstate_t& s,
      ByteT*_First2, ByteT*_Last2, ByteT*&_Mid2) const
   {	// generate bytes to return to default shift state
      return Base::do_unshift(s, _First2, _Last2, _Mid2);
   }

   virtual int __CLR_OR_THIS_CALL do_length(const std::mbstate_t& s, const ByteT*_First1,
      const ByteT*_Last1, size_t _Count) const
   {	// return min(_Count, converted length of bytes [_First1, _Last1))
      return Base::do_length(s, _First1, _Last1, _Count);
   }
};

So, your replacement facet will have to know it needs two bytes read for every character (and vice versa, obviously). The best reference for that sort of information is probably Standard C++ IOStreams and Locales by Angelika Langer and Klaus Kreft[^] - but even then, locales and facets are heavy going in C++ Frown | :-(

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

John R. Shaw29-Jun-09 2:43

John R. Shaw

29-Jun-09 2:43

Thanks, Stuart

That worked great; I expected the problem was something like that. Something else I discovered was that the second template parameter has to be ‘char’ or it will not work. That is ‘unsigned char’ will not even work as the second parameter.

I need to dig up a copy of the standard to see if this is compliant and makes since, because having template parameters that can only be of a single integral type is illogical.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Re: My codecvt (a.k.a. facet) never gets called.

Stuart Dootson29-Jun-09 3:16

Possible to have a two-way Associative Arrays

29-Jun-09 3:16

John R. Shaw wrote:
Something else I discovered was that the second template parameter has to be ‘char’ or it will not work. That is ‘unsigned char’ will not even work as the second parameter.

I need to dig up a copy of the standard to see if this is compliant and makes since, because having template parameters that can only be of a single integral type is illogical.

I think there are two pertinent ideas here - firstly, files are streams of bytes (that's the basic concept underlying file streams in C++), which is why they always convert to/from bytes. Secondly, codecvt facets can be used on their own, without streams.

So, say you'd read in a file converting from a byte stream to (say) UCS-2. Then you want to write the UTF-32 equivalent to a file. You could use a codecvt facet that could convert from UCS-2 to UTF-32. The example code in the codecvt::in documentation on MSDN[^] shows this sort of scenario.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

ComplexLifeForm25-Jun-09 2:30

ComplexLifeForm

25-Jun-09 2:30

Hi,

I am looking for a possibility to have a two way associative array. What I mean is that I would like to have an array say

My2WayArray<int, string=""> _twoWayArray;

and I can do the following

_twoWayArray["user1"] = 123;
_twoWayArray["user2"] = 456;

and

_twoWayArray[123] = "user1";
_twoWayArray[456] = "user2";

this way I will be able to lookup a user if the integer (used as user id) is specified and integer id if user name is provided.

I don't want to use it anywhere, it is just out of curiosity.

While I am posting this question I am trying to figure it out at my end.

Thanks and Regards
Smile | :)

Andy Moore25-Jun-09 6:09

Andy Moore

25-Jun-09 6:09

Look at boost::bimap.

http://www.boost.org/doc/libs/1_39_0/libs/bimap/doc/html/index.html[^]

Pax Domini sit semper vobiscum

Stuart Dootson25-Jun-09 6:10

25-Jun-09 6:10

Bah - you beat me to it by a matter of seconds Smile | :)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Stuart Dootson25-Jun-09 6:09

25-Jun-09 6:09

Like this[^]? Smile | :)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Kevin McFarlane4-Jul-09 6:01

Kevin McFarlane

4-Jul-09 6:01

It's a pity they don't have something like this in the .NET collection classes. And it doesn't seem to exist in the third party libraries either. Frown | :(

Kevin

Stuart Dootson4-Jul-09 7:49

4-Jul-09 7:49

Probably be quite difficult to port the approach used in Boost - one of the first comments I saw in the bimap headers was:

// Bimap Core, use mpl magic to find the desired bimap type

Once you're using the words 'mpl' (== C++ template metaprogramming library) and 'magic' together, there's little to no hope of translating the code directly to another language. I suspect some form of code generator would be the best bet (I seem to remember a container generator being written by someone before C# got generics - that would be similar).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

How to Implement RPC in windows XP

ComplexLifeForm25-Jun-09 7:01

ComplexLifeForm

25-Jun-09 7:01

Thank you Andy and Stuart for the reply.

I was looking for boost bi-map type functionality.

Regards
Smile | :)

suthakar5618-Jun-09 18:45

suthakar56

18-Jun-09 18:45

Hi,

I need to implement the RPC in windows XP based system and I created an IDL file which contains the RPC calls and i created stub files. While compiling with server and client application it shows "You need a Windows NT Version 4.0 or Later to run this stub".But i am using Microsoft Visual C++ 6.0. Can anyone help to solve this problem?

Thanks,

S.Suthakar

Stuart Dootson18-Jun-09 22:05

18-Jun-09 22:05

You probably need to set WINVER[^] to reflect you're using Windows XP, rather than Windows 98, which was the current version of Windows when VC6 came out.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

led mike19-Jun-09 5:25

led mike

19-Jun-09 5:25

What Stuart said and depending on what you are using you might need to have an updated Platform SDK[^] from the original VC6

suthakar5619-Jun-09 5:38

suthakar56

19-Jun-09 5:38

I am using original version. The auto generated code only shows the error(defined in #).if i remove that then it is compiled.