Strings in VC++ 6

Hi

Im using the old VC++ 6 (for some stupid reasons). Im coding a simple WINAPI call to do a recursive file search using 'FindFirstFile' .

Im not been able to concatenate two string. In fact Im not been able to use strings at all, Im currently using char* . I want to use the strings.

when I use : using namespace std; I get the error: error C2871: 'std' : does not exist or is not a namespace


I want to do a simple file search inside a path, recursively.

Im posting this problem after scrapping my brain for 2 days .... :)

regards
Raj

Did you ...

Code:

---

#include <string>

using namespace std;

---

in that order ??

Hi

Thanx , I tried that earlier as well , however I get this

error C2065: 'string' : undeclared identifier


***************************code******************
#include <string>

using namespace std;

....


string abc = "abc";
string xyz;

xyz = abc + "cde";
***************************code******************

Where is stdafx.h? Before or after #include <string>?

Remember also that most of STL was utter c**p in VC++6. std::string might work (maybe) but many other parts of STL either weren't supported or just didn't work. :cry:

Do upgrade your compiler. If you're short of cash you can usually obtain VC++8 (Visual Studio 2005) at very reasonable prices and it's soooo much better than VC++6 in every way.

Not for "some stupid reasons" but for testing purpose, I still use sometimes Visual C++ 6.0 (Enterprise Edition, SP5) and have no problem.

I've attached here a little test application using std::string and other STL stuff.
Just try to compile it yourself. If no success, then it's a mistake in your program or VC6 is not properly installed.

Thanx , It worked like charm,

Also I wanted to find recursive a file inside a path , I tried this ... But i guess its wrongly done.

void list_folder(string sFolderPtr, list<string>& lFileNames)
{
string& sFolder = sFolderPtr;
string sFind = sFolder + "\\*.txt";
WIN32_FIND_DATA findData = {0};
HANDLE hFileFind = ::FindFirstFileA(sFind.c_str(), &findData);
if(INVALID_HANDLE_VALUE != hFileFind)
{
lFileNames.push_back(sFolder); // this pushes the path of *.txt file inside list
do
{
string tempBuff="";
if (!strcmp(findData.cFileName , ".")) continue ; //skip .
if (!strcmp(findData.cFileName , "..")) continue ; //skip ..
if (findData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY ){
// if directory append and search recursive.
string buff = "";
buff = sFolder + "\\" + findData.cFileName ;

list_folder(buff,lFileNames);
}



}while(::FindNextFileA(hFileFind, &findData));
}
FindClose(hFileFind);
}


int main()
{

/* finding *.txt from temp */
string sFolder = "c:\\temp";
list<string> lFileNames;

list_folder(sFolder, lFileNames);

list<string>::const_iterator iter;
const list<string>::const_iterator end = lFileNames.end();
for(iter = lFileNames.begin(); iter != end; ++iter)
{
cout << (*iter).c_str() << endl;
}
return 0;
}

one more update.

when I did
findData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY
for the path string defaultTempPath = "c:\\Documents and Settings\\"+userName+"\\Local Settings\\Temporary Internet Files\\Content.IE5";

all the directories inside the Content.IE5 folder is not recognized as folder by findData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY , it gives 0 (false) as output

:(

I did this
cout << "\n This is boolean value (" << findData.cFileName << ") : " << hex << (findData.dwFileAttributes);

and I got output as 14 (hex)

according to this http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx , there is nothing called 14

whatis going wrong here ?

is this platform specific? will this work on winxp/vista/win7 ?


regards

Quote:

---

Originally Posted by rajsha

according to this http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx , there is nothing called 14

---

Of course there isn't. These attributes are bit flags, so what you have here is FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_SYSTEM.

The condition

Code:

---

findData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY

---

is not good since dwFileAttributes holds more than just one flag. Mask the other flags with logical "and" to get only the flag you need:

Code:

---

(findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY

---

Hi

Im wring a code to search if my website has been downloaded by IE or not, this is done by searching a file recursive inside "c:\\Documents and Settings\\"+userName+"\\Local Settings\\Temporary Internet Files\\Content.IE5";

I wanted to make it recursive search for a file name (abc.jpg) , i wrote this code (based on ovidiucucu's code), but its seems to be not working .

Code:

---

#include "stdafx.h"
#pragma warning(disable: 4786)

#include <iostream>
#include <string>
#include <list>

using namespace std;

void list_folder(string sFolderPtr, list<string>& lFileNames)
{
  string& sFolder = sFolderPtr;
  string sFind = sFolder + "\\*.*";
  WIN32_FIND_DATA findData = {0};
  HANDLE hFileFind = ::FindFirstFileA(sFind.c_str(), &findData); 
  if(INVALID_HANDLE_VALUE != hFileFind)
  {         
         
          do
      {               
                string fileName = findData.cFileName;

                if ( fileName.compare("accountmsg"))
                        cout << "Account msg found" ;
                string tempBuff="";
                if (!strcmp(findData.cFileName , ".")) continue ;
                if (!strcmp(findData.cFileName , "..")) continue ;               
                //cout << "\n This is boolean value (" << findData.cFileName << ") : " << hex << (findData.dwFileAttributes);// == FILE_ATTRIBUTE_COMPRESSED);
                if ((findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY){                               
                       
                        string buff = "";
                        buff = sFolder + "\\" + findData.cFileName ;                       
                        list_folder(buff,lFileNames);
                } // if         

      }while(::FindNextFileA(hFileFind, &findData));
          //lFileNames.push_back((string)buff);
  }
  FindClose(hFileFind);
}


int main()
{

        string userName = (char*) getenv("username"); // temp Directory 
        string defaultTempPath = "c:\\Documents and Settings\\"+userName+"\\Local Settings\\Temporary Internet Files\\Content.IE5";
        string rootDir = "Content.IE5"; 
 


          cout << "Starting \n";
          string sFolder = defaultTempPath;
          list<string> lFileNames;

          list_folder(sFolder, lFileNames);

          list<string>::const_iterator iter;
          const list<string>::const_iterator end = lFileNames.end();
          for(iter = lFileNames.begin(); iter != end; ++iter)
          {
                // cout << (*iter).c_str() << endl;
          }


 
        return 0;
}

---

there is not error , but no desired output as well .... :)


regards

1. std::string::compare returns 0 if the strings are equal, so here is a possible mistake:
   
   Code:

   ---

   if ( fileName.compare("accountmsg"))

   ---

2. don't trust in environment variables; they may differ or may be missing in diffrent systems.
3. do not use hard-coded special folders like "c:\\Documents and Settings..."; they may differ in differnt languages and in different Windows versions.
   Instead, call SHGetSpecialFolderPath or SHGetFolderPath.
4. last but not the least: in your code, no file name is added to the list; of course there is "no desired output as well"... ;)

All these being said, if you want to get a list of files having ".jpg" extension from "Content.IE5" subfolder of temporary Internet files folder, you have to write something like this:

Code:

---

#include "stdafx.h"
// NOTE: <windows.h> and <shlobj.h> included in stdafx.h
#pragma warning(disable: 4786)

#include <iostream>
#include <string>
#include <list>

DWORD list_folder(const std::string& sFolderRef,      // folder to search
                  std::list<std::string>& lFileNames, // file names list
                  const std::string& sExtRef)        // file extension
{
  std::string sFind = sFolderRef + "\\*.*";
  WIN32_FIND_DATA findData = {0};
  HANDLE hFileFind = ::FindFirstFileA(sFind.c_str(), &findData); 
  if(INVALID_HANDLE_VALUE == hFileFind)
  {
      return ::GetLastError();
  }
  else
  {         
      do
      {
        std::string sFileName = findData.cFileName;
        if(("." == sFileName) || (".." == sFileName)) continue;
       
        if(findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        {
            list_folder(sFolderRef + "\\" + sFileName, lFileNames, sExtRef);
        }
        else
        {
            std::string sExt = sFileName.substr(sFileName.rfind(".") + 1);
            // compare extensions, non case-sensitive
            if(! stricmp(sExt.c_str(), sExtRef.c_str()))
            {
              lFileNames.push_back(findData.cFileName);
            }
        }
       
      }while(::FindNextFileA(hFileFind, &findData));
     
  }
  ::FindClose(hFileFind);
  return NO_ERROR;
}

---

Code:

---

int main()
{
  // get internet temporary files special folder
  std::string sTempIntFiles;
  sTempIntFiles.resize(MAX_PATH);
  HRESULT hr = ::SHGetSpecialFolderPath(NULL, &sTempIntFiles[0], CSIDL_INTERNET_CACHE, FALSE);
  if(FAILED(hr))
  {
      std::cout << "SHGetSpecialFolderPath failed. Error: " << std::hex << hr << std::endl;
      return hr;
  }
  std::string sRootDir = sTempIntFiles.c_str();
  sRootDir += "\\Content.IE5";

  std::list<std::string> lFileNames;

  DWORD dwRet = list_folder(sRootDir, lFileNames, "jpg");
  if(NO_ERROR != dwRet)
  {
      std::cout << "list_folder failed. Error: " << std::dec << dwRet << std::endl;
      return dwRet;
  }

  std::list<std::string>::const_iterator iter;
  const std::list<std::string>::const_iterator end = lFileNames.end();
  for(iter = lFileNames.begin(); iter != end; ++iter)
  {
      std::cout << (*iter).c_str() << std::endl;
  }
  return 0;
}

---

[ later edit ]

Please use CODE tags when posting source code examples.
See: http://www.codeguru.com/forum/misc.php?do=bbcode#code

thanx a million

I face this problem when compiled:-
C:\project\web\test\Test_std_VS6.cpp(53) : error C2039: 'SHGetSpecialFolderPath' : is not a member of '`global namespace''
C:\project\web\test\Test_std_VS6.cpp(53) : error C2065: 'SHGetSpecialFolderPath' : undeclared identifier
C:\project\web\test\Test_std_VS6.cpp(53) : error C2065: 'CSIDL_INTERNET_CACHE' : undeclared identifier

Just take a look with a little bit more attention in my example and see this note:

Quote:

---

Originally Posted by ovidiucucu

Code:

---

#include "stdafx.h"
// NOTE: <windows.h> and <shlobj.h> included in stdafx.h

---

---

Also, you may have a look in SHGetSpecialFolderPath function documentation, focus on "Requirements" section and see which header file must be included.