To get a trial key
fill out the form below
Team License (standard version)
Enterprise License (extended version)
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V541. It is dangerous to print a string…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V541. It is dangerous to print a string into itself.

Nov 19 2010

The analyzer detected a potential error: a string gets printed inside itself. This may lead to unexpected results.

Look at this sample:

char s[100] = "test";
sprintf(s, "N = %d, S = %s", 123, s);

In this code, the 's' buffer is used simultaneously as a buffer for a new string and as one of the elements making up the text. The programmer intends to get this string:

N = 123, S = test

But actually this code will cause creating the following string:

N = 123, S = N = 123, S =

In other cases, such code can lead not only to the output of incorrect text, but also to the buffer overflow or a program crash. To fix the code, we should use a new buffer to save the result. This is the correct code:

char s1[100] = "test";
char s2[100];
sprintf(s2, "N = %d, S = %s", 123, s1);

This diagnostic is classified as:

You can look at examples of errors detected by the V541 diagnostic.

This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept