Converting uString to Const char *

Question

3.00/5 (2 votes)

See more:

Hola guys,

I wanna ask something about converting variable.
The story goes when I have :

C++

uString text;

which I need he to be convert as const char *.
I've tried the same way how to convert std::string to const char, but it didn't work.

C++

std::string str;
char * writable = new char[str.size() + 1];
std::copy(str.begin(), str.end(), writable);
writable[str.size()] = '\0'; 

delete[] writable;
                        // NOOTTTT WORRRKKKK FOR MEE!!!!//////

Anybody knows how to do it?

Thanks

Posted 28-Oct-12 22:21pm

satrio_budidharmawan

Updated 29-Oct-12 0:39am

TorstenH.

v2

Add a Solution

Comments

TorstenH. 29-Oct-12 6:40am

I removed the Java Tag - don't know what this has to do with java.

pasztorpisti 29-Oct-12 7:17am

Maybe it uses the ICU library on which java's unicode support builds but ICU has an UString and not an uString. We don't exactly know what is this uString so we can not know how to handle it... I'm afraid the poster has no clear understanding of text encoding.

1 solution

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)

enhzflep · Answer 1 · 2012-10-28T22:57:00

I can't be sure, but it sounds like you have a function that takes a const char* as an input, and all you have is a std::string. If that's the case, you can forget about the const part for now - that's there to indicate to you and be made enforceable by the compiler that no changes will happen to that variable during the function. - This will actively prevent writing data to a var that's a reference.

But, getting back to the issue at hand, how to convert a std::string into something more useful.

How about just this plain and simple 1 liner?

char *writeable = str.c_str();

You can find the docs here: http://www.cplusplus.com/reference/string/string/c_str/[^]

Note specifically, you (a) don't have to allocate the memory yourself (b) you don't have to free it yourself (c) you shouldn't try to modify it - it's a const char*