Not every API is designed extremely careful: quite some times "char*"
doesn't mean the implementation may change the memory.
I doubt SQLConnect change "char*", therefore you can safely cast from "const
char*" to "char*"
On 1/25/07, Adriano Crestani <[EMAIL PROTECTED]> wrote:
It's an ODBC function:
SQLConnect (
SQLHDBC ConnectionHandle, /* hdbc */
SQLCHAR *ServerName, /* szDSN */
SQLSMALLINT ServerNameLength, /* cbDSN */
SQLCHAR *UserName, /* szUID */
SQLSMALLINT UserNameLength, /* cbUID */
SQLCHAR *Authentication, /* szAuthStr */
SQLSMALLINT AuthenticationLength);
I'm needing to turn the server name that is a string object
into a char* to cast it to SQLCHAR* and I didn't find any other
function that takes const SQLCHAR* instead of SQLCHAR*. Thanks again ; )
.
On 1/25/07, Pete Robbins <[EMAIL PROTECTED]> wrote:
>
> OK. I have to ask.... what function are you calling that takes a char*?
Is
> there an equivalent that takes const char*?
>
> Cheers,
>
>
> On 25/01/07, Adriano Crestani <[EMAIL PROTECTED]> wrote:
> >
> > I'm trying to use a function that requires a char* not const as a
> > paremeter.
> > I think strdup will help a lot, thanks ; )
> >
> > Adriano Crestani
> >
> > On 1/25/07, Pete Robbins <[EMAIL PROTECTED]> wrote:
> > >
> > > On 25/01/07, Adriano Crestani <[EMAIL PROTECTED]> wrote:
> > > > I'm begginer with C++ and I would like to know the best way to
> obtain
> > a
> > > > char* from a string object, for example:
> > > >
> > > > string name = "Alice";
> > > > char* namePtr = (char*) string; // this is not possible : (
> > > >
> > > > Obs.: I'm needing a char* and not a const char* pointer
> > > >
> > > > Thanks.
> > > >
> > > > Adriano Crestani
> > > >
> > > >
> > >
> > > std::string has a .c_str() method to return the const char*
> > > const char* namePtr = name.c_str();
> > >
> > > Why do you need char* and not const char*? You could cast the value
to
> > > char* but it is const for a good reason... you should not use c
> > > functions to manipulate the characters in std:string!
> > >
> > > You can take a copy of the string using strdup.
> > >
> > > Cheers,
> > >
> > > --
> > > Pete
> > >
> > >
---------------------------------------------------------------------
> > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > For additional commands, e-mail: [EMAIL PROTECTED]
> > >
> > >
> >
> >
>
>
> --
> Pete
>
>
--
Yang ZHONG
