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  2646  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 | |
by: Rajshekhar |
last post by:
hi all,
i would like to know how to read .xls file using fopen & getc
combination
(usual procedure thats follwd for read file)..
any ptrs or any function that anybody can suggest??
Rajshekhar
|
by: Robbie |
last post by:
Anybody out there know of a way to read a text file starting from the
bottom of the file then going backwards line by line? I am reading
large log files in which the data I'm looking for is always near the
bottom.
I would like something like:
StreamReader sr = new StreamReader("MyFile.txt");
string line = sr.ReadLine(-1); <-- this functionality doesn't exist.
|
by: Lam |
last post by:
Hi
the default readline method in StreamReader read the text from the top to
bottom
how can I read a text file from the bottom to the top?
Thanks
|
by: ESPN Lover |
last post by:
Below is two snippets of code from MSDN showing how to read a file. Is one
way preferred over the other and why? Thanks.
using System;
using System.IO;
class Test
{
public static void Main()
|
by: Jose Reckoner |
last post by:
I'm running python 2.3 on Windows XP. Anyone have a quick small script
to convert .DT1 and .DEM data to ASCII or some other format? I don't
need a viewer.
Thanks!
| | |
by: I. Myself |
last post by:
This is about reading the .ini files which are used in several of our
projects.
Currently, the actual read of each line of the file is with this statement:
fscanf(file, "%s %s", name, value); /* reads two strings from .ini
file */
This works, but it does not allow any comments to the right of the two
strings.
|
by: Samant.Trupti |
last post by:
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
|
by: sejal17 |
last post by:
hello
Can any one tell me how to read multiple worksheets from a single excel file.I have stored that excel in xml file.so i want to read that xml that has multiple worksheet.And i want to store that multiple worksheet data in different table.How can i do it.Below is my xml file.
<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:o="urn:schemas-microsoft-com:office:office"
...
|
by: sejal17 |
last post by:
hello
Can any one tell me how to read multiple worksheets from a single excel file.I have stored that excel in xml file.so i want to read that xml that has multiple worksheet.And i want to store that multiple worksheet data in different table.How can i do it.Below is my xml file.
<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:o="urn:schemas-microsoft-com:office:office"...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
| | |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| | |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |
