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STL getline fails

I'm using 'getline' for reading data from a file and writing it to another file.
like
  getline(inputFileObject,string,'\n')
It fails when there is occurance of the following character pattern
(\r\n\r\n\r\n)

0D 0A 0D 0A 0D 0A

characters. My OS is DYNIX/PTX (UNIX)

The same code works in VC++ 6.0.

Any idea?

(using 'strings' command and processing the input file works. but it looses format)


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prashant_n_mhatre
Asked:
prashant_n_mhatre
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1 Solution
 
DanRollinsCommented:
In what way does it fail?  I would expect it to return three empty strings.  What is it doing?

-- Dan
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prashant_n_mhatreAuthor Commented:
Here is the dump of the portion:

http://www.onesmartclick.com/books/dump.gif

It writes till '<html>' then doesn't write anything to file.

This is the test code I'm using:


void writeToFile(ifstream& inpFile)
{
    string refLine;
    ofstream fileout ("output.txt");
    while ( getline(inpFile,refLine,'\n') )
    {
        fileout << refLine;
        fileout << "\n";
    }
    fileout.close();
}

May be the code is buggy.

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fl0ydCommented:
You should definately get rid of those constants, i.e. "\n" is bad -- the stl does have a replacement for that, that works across platforms: std::endl -- use this and see if it solves your problem.
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DanRollinsCommented:
It has something to do with the idiotic STL and namespace.  This sequence works because I waved a magic std wand over it:

#include <fstream>
#include <string>

void writeToFile( std::ifstream& inpFile )
{
     std::string refLine;
     std::ofstream fileout ("c:\\temp\\output.txt");
     while ( std::getline( inpFile, refLine, '\n' ) ) {
          fileout << refLine;
          fileout << "\n";
     }
     fileout.close();
}

void main()
{
     std::ifstream inpFile( "c:\\temp\\input.txt" );
     writeToFile(inpFile);
}

-- Dan
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DanRollinsCommented:
hi prashant_n_mhatre,
Do you have any additional questions?  Do any comments need clarification?
-- Dan
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prashant_n_mhatreAuthor Commented:
I tried out both options..nothing works... Works on Windows but doesn't work on DYNIX/PTX... Is it possible that stl library on DYNIX/PTX is buggy?
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DanRollinsCommented:
>> Is it possible that stl library on DYNIX/PTX is buggy?

It is possible.  But I ask that you try the sequence I provided, without change of any kind... it is a complete program.  Verify that it fails *only* when the input file has exactly four sequential sets of 0x0d 0x0a bytes.  Does it also fail with three or two in a row?

You might also want to try opening the file in binary mode (that was my first guess, but I stopped short of that when I got my sample working).

-- Dan
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prashant_n_mhatreAuthor Commented:
It doesn't compile on my machine. It says

"dan.cpp", line 8: error #304: no instance of overloaded function
          "std::getline" matches the argument list
            argument types are: (std::ifstream, std::string, char)
                        while ( std::getline( inpFile, refLine, '\n' ) ) {
                                ^

1 error detected in the compilation of "dan.cpp".
c++: Fatal Error: Compilation failed
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DanRollinsCommented:
The compiler must be buggy.  The first param is a std::ifstream, the second param is a std::string, and the third parm is a char.  So the error message is bogus.  Stick to VC++ Its the only compiler worth using.

-- Dan
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prashant_n_mhatreAuthor Commented:
Yep..I also think so..Thanks for your help !!!
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