how to store large strings in c/c++ having size nearly 10^6 characters

Question

0.00/5 (No votes)

See more:

C++

C

how to store large strings in c/c++ having size nearly 10^6 characters

Posted 23-Jun-13 1:47am

Brady Bar

Updated 23-Jun-13 2:15am

Richard MacCutchan

v2

Add a Solution

Comments

Richard MacCutchan 23-Jun-13 8:16am

What sort of string would have that many characters? The chances are that you sould consider breaking the data up into more manageable chunks for ease of processing.

4 solutions

Solution 2

I would look at the Standard Template Library std::string

http://www.cprogramming.com/tutorial/string.html[^]

Posted 23-Jun-13 3:30am

User 59241

Solution 3

I would consider using a file to store the data and read it in small chunks for processing.
If you're on Windows, I would recommend, storing the data in a file and memory mapping the file using the following APIs -

CreateFile
CreateFileMapping
MapViewOfFile

Posted 23-Jun-13 19:09pm

«_Superman_»

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Stefan_Lang · Accepted Answer · 2013-06-23T23:12:00

If you know the exact size in advance and it won't change, just use new. You should be able to allocate a thousand times as much without a problem.

If you don't know the exact size in advance, or the string contents (and size) will change, then in theory you should use the class std::string instead. It will take care of (re)allocations, if needed. That said, any change will take considerably more time for a single large string, than it would take if you created a properly structured set of smaller strings instead. If for instance the string holds the contents of a text file, it would be more sensible to store each line inside a separate string variable.

Jochen Arndt · Accepted Answer · 2013-06-23T02:05:00

Solution 1

Just allocate buffers with sufficient size using new (C++) or malloc (C).

Posted 23-Jun-13 2:05am

Jochen Arndt

Comments

JackDingler 24-Jun-13 8:43am

That's only a megabyte. So this solution is fine, as is using std::string as mentioned by others.

IF you have some big hardware and need many of these strings, then go 64bit.

how to store large strings in c/c++ having size nearly 10^6 characters

4 solutions

Solution 4

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0

Existing Members

...or Join us