<g++ 3.4.4> Problem with reading file into string

[alexvn]

Hi,

Here are two functions that read text and binary file into string.


// --------------------------------------
string txt_file_to_string ()
{
ostringstream oss;

  fs_infile_txt.clear();
  fs_infile_txt.seekg (0, ios::beg);

vector<char> v (infile_txt_filesize);
  fs_infile_txt.read(&v[0], infile_txt_filesize);

ostream_iterator<char> out(oss);
  copy (&v[0], &v[v.size()], out);

  return oss.str();

}

string bin_file_to_string ()
{
ostringstream oss;

  fs_infile_bin.clear();
  fs_infile_bin.seekg (0, ios::beg);

vector<char> v (infile_bin_filesize);
  fs_infile_bin.read(&v[0], infile_bin_filesize);

ostream_iterator<char> out(oss);
  copy (&v[0], &v[v.size()], out);

  return oss.str();

}

// --------------------------------------

There is no problem with those functions with
g++ 3.3.3 on Cygwin,
gpp 3.4.1 on Djgpp,
gpp 4.0.1 on Djgpp.

But there is a problem with txt_file_to_string () while using
g++ 3.4.4 on Cygwin

P.S. There is no problem with bin_file_to_string () while using
g++ 3.4.4 on Cygwin


Full test file xxx2.cpp is at
http://groups.google.com/group/test-av/msg/6fa382a8feb737c1


Here are results of the running:


====== Run-1 (OK) ======

$ a 1023


        YOUR COMMAND LINE : a 1023

        ### File size : 1023


mbuffer size = 1024


Sizes :
        infile_content.size() = 1023
        str_txt.size()        = 1023
        str_bin.size()        = 1023
        str_iss.size()        = 1023

OK! infile_content == str_txt

OK! infile_content == str_bin

OK! infile_content == str_iss


========================




====== Run-2 (Problem) ======

$ a 1024


        YOUR COMMAND LINE : a 1024

        ### File size : 1024


mbuffer size = 1025


Sizes :
        infile_content.size() = 1024
        str_txt.size()        = 1024
        str_bin.size()        = 1024
        str_iss.size()        = 1024

WARNING! infile_content != str_txt
--- Different strings ---
str1.size() = 1024, str2.size() = 1024

str1[1018] = <Y>; str2[1018] = <S>
str1[1019] = <Z>; str2[1019] = <T>
str1[1020] = <A>; str2[1020] = <U>
str1[1021] = <B>; str2[1021] = <V>
str1[1022] = <C>; str2[1022] = <W>
str1[1023] = <D>; str2[1023] = <X>

-------------------------

OK! infile_content == str_bin

OK! infile_content == str_iss


=============================


 Alex Vinokur
     email: alex DOT vinokur AT gmail DOT com
     http://mathforum.org/library/view/10978.html
     http://sourceforge.net/users/alexvn