I need to read a huge file. The content that I want to read are
somewhere at the bottom. Can anyone please let me know a way to read
the file bottom up?
Thanks
Trupti
7  2639  Sa***********@g mail.com wrote:
I need to read a huge file. The content that I want to read are
somewhere at the bottom. Can anyone please let me know a way to read
the file bottom up?
Take a look at the istream::seekg method. It will let you position the
file-pointer at an arbitrary place in the input stream.
On Feb 18, 9:29 am, "Samant.Tru...@ gmail.com"
<Samant.Tru...@ gmail.comwrote:
I need to read a huge file. The content that I want to read are
somewhere at the bottom. Can anyone please let me know a way to read
the file bottom up?
Thanks
Trupti
$ tail my_huge_file.tx t
If that's not suitable for your environment, you
should provide some details on that.
Sean
On 18 Feb., 17:42, Jeff Schwab <j...@schwabcen ter.comwrote:
Samant.Tru...@g mail.com wrote:
I need to read a huge file. *The content that I want to read are
somewhere at the bottom. *Can anyone please let me know a way to read
the file bottom up?
Take a look at the istream::seekg method. *It will let you position the
file-pointer at an arbitrary place in the input stream.
No it will not. seek will only (portably) position you somewhere where
you have been before.
/Peter
On 18 Feb., 18:00, sean_in_rale... @yahoo.com wrote:
On Feb 18, 9:29 am, "Samant.Tru...@ gmail.com"
<Samant.Tru...@ gmail.comwrote:
I need to read a huge file. *The content that I want to read are
somewhere at the bottom. *Can anyone please let me know a way to read
the file bottom up?
Thanks
Trupti
*$ tail my_huge_file.tx t
If that's not suitable for your environment, you
should provide some details on that.
Sean
tail is not appropriate as it is not portable, not C++ and not generic
(tail is for text-files only).
/Peter
peter koch wrote:
On 18 Feb., 17:42, Jeff Schwab <j...@schwabcen ter.comwrote:
>Samant.Tru...@ gmail.com wrote:
>>I need to read a huge file. The content that I want to read are
somewhere at the bottom. Can anyone please let me know a way to read
the file bottom up?
Take a look at the istream::seekg method. It will let you position the
file-pointer at an arbitrary place in the input stream.
No it will not. seek will only (portably) position you somewhere where
you have been before.
According to what? I'm looking at the draft standard for 0x, and don't
see anything like that. The seekg method can fail, but I don't see
anything magical about "where you have been before."
On 22 Feb, 10:02, guinness.t...@g mail.com wrote:
>
* * std::ifstream file( "myfile.dat ", std::ios_base:: binary );
* * file.seekg( 0, std::ios_base:: end );
* * std::streampos const endpos = file.tellg();
* * file.seekg( 0, std::ios_base:: beg );
* * std::streamoff const file_length = file.tellg() - endpos;
// Aaagh!
std::streamoff const file_length = endpos - file.tellg();
--
Tony
On 22 Feb, 15:59, James Kanze <james.ka...@gm ail.comwrote:
Table 88 in 27.4.3.2 indicates that a distance (streamoff) can
be obtained by subtracting one streampos from another.
Although I can't find it explicitly stated, usage (and one of
the footnotes) imply to me that streamoff is integral.
Which footnote?
I think I must have been referring to footnote 174)
(in 17.4.4.7): "... types described as synonyms for
basic integral types, such as ... streamoff."
--
Tony This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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I need to read a huge file. The content that I want to read are
somewhere at the bottom. Can anyone please let me know a way to read
the file bottom up?
Thanks
Trupti
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