• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0
Revin122

Converting std::string to char* to LPTSTR

8 posts in this topic

I'm having trouble on converting std::string to a char*...it always say cannot convert...I tried to use the = operator and strcpy... But is there a way to convert the string to LPTSTR immediately...I need it for my output in a function I made that needs a LPTSTR output with a string input. I'm trying to convert it to char* but still cannot convert.
0

Share this post


Link to post
Share on other sites
when I used .c_str() to the string it came out as "cannot convert from 'const char *' to 'LPTSTR'"
0

Share this post


Link to post
Share on other sites
In that case you're obviously programming with UNICODE defined to true.
For VS2005 go to "Configuration Properties -> General -> Character Set" and set it to "Use Multi-Byte Character Set"
0

Share this post


Link to post
Share on other sites
LPTSTR is typedefed as a non-const char*. You can't convert a std::string to a non-const buffer, you'll have to do something like:

char szBuff[256];
Func(szBuff);
std::string str = szBuff;


It may also be a unicode thing, as iMalc said.

Can we see some code to see exactly what you're doing?
0

Share this post


Link to post
Share on other sites
LPTSTR is actually a generic text string type. It may or may not be "a non-const char*" as you say.

From MSDN, it's "An LPWSTR if UNICODE is defined, an LPSTR otherwise."
0

Share this post


Link to post
Share on other sites
Quote:
Original post by scorpion007
LPTSTR is actually a generic text string type. It may or may not be "a non-const char*" as you say.

From MSDN, it's "An LPWSTR if UNICODE is defined, an LPSTR otherwise."


From winnt.h:

#ifdef UNICODE
typedef LPWSTR PTSTR, LPTSTR;
#else
typedef LPSTR PTSTR, LPTSTR;
#endif

typedef __nullterminated CHAR *NPSTR, *LPSTR, *PSTR;
typedef __nullterminated WCHAR *NWPSTR, *LPWSTR, *PWSTR;


Meaning a LPTSTR is a non-const multi-byte or wide character string. My point is that it's always non-const, meaning you can't convert a std::string or std::wstring to it directly.
0

Share this post


Link to post
Share on other sites
If you want to convert a narrow character string to a wide character string, you can use mbstowcs(), or if you're feeling adventurous, the widen() member function of the ctype facet of a std::locale. Alternately, if you're willing to use ATL, you can use the CA2T macro to create a TCHAR buffer from a const char *. Ex:

CA2T buffer(my_string.c_str());

This uses the default buffer size of 128, though. If you need a larger buffer, you should use the CA2TEX macro instead, which allows you to explicitly specify a buffer size.
0

Share this post


Link to post
Share on other sites
Quote:
Original post by Evil Steve
Meaning a LPTSTR is a non-const multi-byte or wide character string. My point is that it's always non-const, meaning you can't convert a std::string or std::wstring to it directly.


It's a *single*-byte (narrow) or wide character string, depending on UNICODE, as I already said.
0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0