Anyone knows how to convert a LPCTSTR to an STL striung?. Can't seem to
finda nyting (that dosen't blab on for several pages) on the net about
how to do this
10  17418 
Lucy Ludmiller wrote:
Anyone knows how to convert a LPCTSTR to an STL striung?. Can't seem
to finda nyting (that dosen't blab on for several pages) on the net
about how to do this
typedef std::basic_stri ng<TCHARtstring ;
LPCTSTR pstz;
// ...
tstring tstr(ptsz); // construct a tstring from an LPCTSTR
// ...
Now, if you always want a narrow string (std::string), regardless of whether
it's a Unicode build or not, then you'll have to insert a narrowing
conversion from TSTR to char*, e.g. using wcstombs or WideCharToMulti Byte.
Generally though, what you want it a std::basic_stri ng of the same
"wideness" as TCHAR, so the simple typedef will do the trick.
-cd
>Anyone knows how to convert a LPCTSTR to an STL striung?. Can't seem
>to finda nyting (that dosen't blab on for several pages) on the net
about how to do this
typedef std::basic_stri ng<TCHARtstring ;
LPCTSTR pstz;
// ...
tstring tstr(ptsz); // construct a tstring from an LPCTSTR
Just make sure that ptsz is different from NULL before you do this.
--
Kind regards,
Bruno van Dooren br************* *********@hotma il.com
Remove only "_nos_pam"
Bruno van Dooren [MVP VC++] wrote:
>>Anyone knows how to convert a LPCTSTR to an STL striung?. Can't seem
to finda nyting (that dosen't blab on for several pages) on the net
about how to do this
typedef std::basic_stri ng<TCHARtstring ;
LPCTSTR pstz;
// ...
tstring tstr(ptsz); // construct a tstring from an LPCTSTR
Just make sure that ptsz is different from NULL before you do this.
Hi Bruno,
Any idea why Windows developers (not people who develop apps for
Windows, but people who develop Windows + the SDK) likes doing a
misleading #define on pointer so much?
I've been doing this for sometime so it doesn't surprise me anymore, but
I've seen many cases of people who just started and don't realize that
LPCTSTR is a const TCHAR* and think that it's some non-pointer magic
string and as such no memory allocation necessary, etc. What's wrong
with const TCHAR*, really?
Thanks,
Ray
Ray wrote:
Bruno van Dooren [MVP VC++] wrote:
>>>Anyone knows how to convert a LPCTSTR to an STL striung?. Can't
seem to finda nyting (that dosen't blab on for several pages) on
the net about how to do this
typedef std::basic_stri ng<TCHARtstring ;
LPCTSTR pstz;
// ...
tstring tstr(ptsz); // construct a tstring from an LPCTSTR
Just make sure that ptsz is different from NULL before you do this.
Hi Bruno,
Any idea why Windows developers (not people who develop apps for
Windows, but people who develop Windows + the SDK) likes doing a
misleading #define on pointer so much?
I've been doing this for sometime so it doesn't surprise me anymore,
but I've seen many cases of people who just started and don't realize
that LPCTSTR is a const TCHAR* and think that it's some non-pointer
magic string and as such no memory allocation necessary, etc. What's
wrong with const TCHAR*, really?
In the days of different pointer sizes (near, far, huge, etc), it was
helpful to have typedefs. Even without those issues anymore, many C and C++
programmer prefer to use a typedef instead of retyping a compound type every
time.
As to why someone would think it's something special, or doesn't need the
same care for memory management that any other pointer deserves, I couldn't
say.
-cd
Carl Daniel [VC++ MVP] wrote:
In the days of different pointer sizes (near, far, huge, etc), it was
helpful to have typedefs. Even without those issues anymore, many C and C++
programmer prefer to use a typedef instead of retyping a compound type every
time.
Oh... no wonder. That explains it. Thanks Carl :)
As to why someone would think it's something special, or doesn't need the
same care for memory management that any other pointer deserves, I couldn't
say.
Yeah... I suppose it's because one has expected a pointer to have a *
when you define it. e.g.: it's clearer to have
void blah(const TCHAR* b)
instead of
void blah(LPCTSTR b)
although after a while of Win programming it's kinda becomes a habit.
Cheers
Ray
>
-cd
On Tue, 05 Sep 2006 20:49:27 +0800, Ray <ra********@yah oo.comwrote:
>Carl Daniel [VC++ MVP] wrote:
>In the days of different pointer sizes (near, far, huge, etc), it was
helpful to have typedefs. Even without those issues anymore, many C and C++
programmer prefer to use a typedef instead of retyping a compound type every
time.
Oh... no wonder. That explains it. Thanks Carl :)
>As to why someone would think it's something special, or doesn't need the
same care for memory management that any other pointer deserves, I couldn't
say.
Yeah... I suppose it's because one has expected a pointer to have a *
when you define it. e.g.: it's clearer to have
void blah(const TCHAR* b)
instead of
void blah(LPCTSTR b)
although after a while of Win programming it's kinda becomes a habit.
It all makes sense when you understand the naming conventions.
"LP" means "long pointer", the "long" referring as mentioned to the
days when Intel CPU's used either long (segment-offset) or short
(offset only) pointers. The "C" means constant. And, of course,
"TSTR" means string of TCHAR.
Virtually all Windows pointer types have LP or P names.
I know people rail against such naming conventions but I find it
useful (provided they are accurate).
While we're at it, I just found out that PTCHAR isn't the same as
LPTSTR. The following code won't compile:
#include <tchar.h>
#include <windows.h>
int _tmain(int argc, TCHAR* argv[])
{
PTCHAR p = 0;
}
If the two include directives change places, OR if LPTSTR stands instead
of PTCHAR then it will compile.
Mihajlo Cvetanović wrote:
While we're at it, I just found out that PTCHAR isn't the same as
LPTSTR. The following code won't compile:
#include <tchar.h>
#include <windows.h>
int _tmain(int argc, TCHAR* argv[])
{
PTCHAR p = 0;
}
If the two include directives change places, OR if LPTSTR stands instead
of PTCHAR then it will compile.
Ugh... there you have another reason to have a simple TCHAR* instead of
these defines.
Ray
r norman wrote:
"LP" means "long pointer", the "long" referring as mentioned to the
days when Intel CPU's used either long (segment-offset) or short
(offset only) pointers. The "C" means constant. And, of course,
"TSTR" means string of TCHAR.
Sure, one can learn how to decode this information, and be able to deal
with these typedefs. But the question is not whether you can do it or
not, but how long it takes.
It takes an instant to understand
const TCHAR* b
and 15-25 seconds to decrypt
LPCTSTR b
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