Ostringstream null terminated

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Software Developer Senior. First Prev Next. May be buffer safe, but no replacement for sprintf Member 3-Mar Member The problem with trying to use stringstream as a replacement for sprintf is, ironically, brought to light by the very article that is espousing that idea.

First, don't get me wrong, if you just need to do some simple string formatting, stringstream works great and it is buffer safe. But just look at the myriad options and code conditions you would have to implement just to begin to scratch the surface of what sprintf can do. And all of that is just for displaying a basic integer.

Add on floating point, with exponent options, and now you have another mountain of code to write to handle all those cases. In fact, maybe that's the solution: a complete wrapper class based on stringstream that supports everything that sprintf can do. I think the boost formatting about does that. Re: May be buffer safe, but no replacement for sprintf Christian Graus 3-Mar Have you ever looked at the boost::format library? This uses streams and allows you to format strings in a similar manner, even using printf friendly specifiers if need be.

All done with type-safe streams as per your examples. Anyway, good article. Left precision The Gilb Dec Excellent replacement for sprintf, Format supermyers Sep Check out the Boost Format Library. I read this article, and stringstreams are good, but don't always do what I need. For example, you can't store a format string in a resource file, and get values into the formatted string. Then I found the Boost Format Library! Here are cpp sstream little benchtests, ostringstream still so slow and maybe also contains a conversion bug?

Here follows a simple example okay did not try to optimize anything here, just used sstream in a classroom type example and compared it to the c-style sprintf and strtod functions. What we notice is : 1. The cstreams implementation is almost 5 times faster than cppstreams 2. The cppstreams gives an extra double which differs from original after conversion to string and back. This is free software; see the source for copying conditions.

Kind regards, Walter Schreppers. Re: include Christian Graus Feb Sorry, I meant that iostreams is the name of the overall library. Format the precison to 3 digits. Hi all, I need to get the formatted string from the out such that, it alwast give me three digit precision. Even in second case, I get only 4.

Please let me know how I can achieve this. Thanks in advance Sandeep. Re: Format the precison to 3 digits. There is obviously some rounding going on, I'm not sure how to force display of meaningless digits, sorry.

I'd imagine you'd have to write some sort of helper object to do it. Great article. This makes for more reliable, comprehensible and maintainable code. But, it should be noted that snprintf is a buffer safe Though not type safe. That is, you can specify the maximum size of the char buffer for snprintf to work on. It can be tedious to keep track of the sizes of the buffers passed to snprintf, depending on how they were allocated, but it can be made quite safe, with care.

Re: snprintf is buffer overrun safe dibeas 1-Jun I have not been able to use it inside Visual Studio Why is volatile keyword not needed for thread synchronisation? Why standard containers use function templates instead of non-template Koenig operators. How can I search an std::map using a key of a different type.

Feeding string into ostringstream only uses up to the first null? Mobile Development. How to use Nuget assembly as files with visual studio community.

Ms access. Append Query trying not to add duplicate records to new table. Follow us! Get the Latest Bytes Updates. By using this site, you agree to our Privacy Policy and Terms of Use. General lancet: a comprehensive, efficient, and reusable util function library of go reply views Thread by lanliddd last post: by.

The string "World" is already null-terminated. That's how C strings work. It doesn't strip anything. Why do you think a stream operation is faster than a string? And why build the string before outputting to cout? Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Why does ostringstream strip NULL? Ask Question. Asked 10 years, 6 months ago.