wide string problem ...

[SteveB]

Hi

I'm having major problems writing a function that converts a long
value into a wide string !!! I'm more than likely going round in
circles and not seeing the wood for the trees now but am frustreated
just the same.

My function looks like this:

std::wstring CReportCreator: :SetEmpricalDef aults(const udtLONG&
udtValue)
{
wstring ret = L"";
ret = Utilities::Long ToStdWString(ud tValue.lngValue );
return ret;

}
LongToStdWStrin g() is used elsewhere and works ok.

My call is this:

wstring strOut = SetEmpricalDefa ults(300L);

and then:

WCHAR xml[255];
wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut);

wsprintf throws a scalar deleting desctructor exception.

when i debug strOut show as "*300".

does anyone know what the '*' represents at the beginning of the 300 ?

does anyone know of a function that will return a unicode string from
a long ? so far i've tried stringstreams and _ltow but always get the
* in front of the 300 and wsprintf throws an exception ...

many thanks

[mimi]

On Mar 12, 5:27 pm, "SteveB" <s...@thebretts .co.ukwrote:

Hi

I'm having major problems writing a function that converts a long
value into a wide string !!! I'm more than likely going round in
circles and not seeing the wood for the trees now but am frustreated
just the same.

My function looks like this:

std::wstring CReportCreator: :SetEmpricalDef aults(const udtLONG&
udtValue)
{
wstring ret = L"";
ret = Utilities::Long ToStdWString(ud tValue.lngValue );
return ret;

}

LongToStdWStrin g() is used elsewhere and works ok.

My call is this:

wstring strOut = SetEmpricalDefa ults(300L);

and then:

WCHAR xml[255];
wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut);

wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut.data()); //Should be
this?

>
wsprintf throws a scalar deleting desctructor exception.

when i debug strOut show as "*300".

does anyone know what the '*' represents at the beginning of the 300 ?

does anyone know of a function that will return a unicode string from
a long ? so far i've tried stringstreams and _ltow but always get the
* in front of the 300 and wsprintf throws an exception ...

many thanks

[Alf P. Steinbach]

* SteveB:

Hi

I'm having major problems writing a function that converts a long
value into a wide string !!! I'm more than likely going round in
circles and not seeing the wood for the trees now but am frustreated
just the same.

My function looks like this:

std::wstring CReportCreator: :SetEmpricalDef aults(const udtLONG&
udtValue)
{
wstring ret = L"";
ret = Utilities::Long ToStdWString(ud tValue.lngValue );
return ret;

}

Just a style issue, but make that

{
return Utilities::Long ToStdWString(ud tValue.lngValue );
}

LongToStdWStrin g() is used elsewhere and works ok.

If you say so.

My call is this:

wstring strOut = SetEmpricalDefa ults(300L);

and then:

WCHAR xml[255];
wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut);

wsprintf throws a scalar deleting desctructor exception.

Yes, passing a non-POD class type object to "..." is Undefined Behavior.

It's unclear why you're trying to copy the string to a fixed size buffer.

when i debug strOut show as "*300".

does anyone know what the '*' represents at the beginning of the 300 ?

Depends on your debugger if it's not part of the textual string value.

does anyone know of a function that will return a unicode string from
a long ?

You stated above, "LongToStdWStri ng() is used elsewhere and works ok".

so far i've tried stringstreams

The wide string stream support in g++ for Windows is lacking; perhaps
that's the compiler you're using?

and _ltow

Non-standard.

but always get the * in front of the 300

Mostly irrelevant.

and wsprintf throws an exception ...

If this is from the code shown above, then see above.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[SteveB]

On 12 Mar, 09:59, "mimi" <cainiaodelixi. [e-mail] te:

On Mar 12, 5:27 pm, "SteveB" <s...@thebretts .co.ukwrote:

Hi

I'm having major problems writing a function that converts a long
value into a wide string !!! I'm more than likely going round in
circles and not seeing the wood for the trees now but am frustreated
just the same.

My function looks like this:

std::wstring CReportCreator: :SetEmpricalDef aults(const udtLONG&
udtValue)
{
wstring ret = L"";
ret = Utilities::Long ToStdWString(ud tValue.lngValue );
return ret;

}

LongToStdWStrin g() is used elsewhere and works ok.

My call is this:

wstring strOut = SetEmpricalDefa ults(300L);

and then:

WCHAR xml[255];
wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut);

wsprintf(xml, L"<X><a=\"%s \" /></X>", strOut.data()); //Should be
this?

wsprintf throws a scalar deleting desctructor exception.

when i debug strOut show as "*300".

does anyone know what the '*' represents at the beginning of the 300 ?

does anyone know of a function that will return a unicode string from
a long ? so far i've tried stringstreams and _ltow but always get the
* in front of the 300 and wsprintf throws an exception ...

many thanks- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

many thanks

[SteveB]

Alf I'm sure you're a clever guy but I really just asked a question.
The one line answer above was just fine.

[Alf P. Steinbach]

* SteveB:

Alf I'm sure you're a clever guy but I really just asked a question.
The one line answer above was just fine.

Please quote relevant context.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[Alf P. Steinbach]

* Alf P. Steinbach:

* SteveB:

>Alf I'm sure you're a clever guy but I really just asked a question.
The one line answer above was just fine.

Please quote relevant context.

I mean, I'm not into guessing games: if you want help, be clear.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

[SteveB]

On 13 Mar, 14:08, "Alf P. Steinbach" <[e-mail] rote:

* Alf P. Steinbach:

* SteveB:

Alf I'm sure you're a clever guy but I really just asked a question.
The one line answer above was just fine.

Please quote relevant context.

I mean, I'm not into guessing games: if you want help, be clear.

--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

i wasn't posting to get a lecture in how to phrase my questions alf.

it was clear enough for someone else to aswer.

i think you need to get over yourself.

[peter koch]

On 16 Mar., 13:39, "SteveB" <s...@thebretts .co.ukwrote:

i think you need to get over yourself.

And I think you need to learn to behave yourself. Alf gave you lots of
valuable info. Being rude is about the silliest response imaginable.

/Peter

[SteveB]

On 16 Mar, 13:08, "peter koch" <peter.koch.lar [e-mail] ote:

On 16 Mar., 13:39, "SteveB" <s...@thebretts .co.ukwrote:i think you need to get over yourself.

And I think you need to learn to behave yourself. Alf gave you lots of
valuable info. Being rude is about the silliest response imaginable.

/Peter

i wasn't being rude peter. mimi answered my question without needing
to dismantle the post and split hairs. my post was directed at the
community and was just at alf. if you read the reply he doesn't really
contribute anything at all. all i'm saying is that if he dopesn't know
the answer where is the benefit of his one hair splitters ? and the be
honest i did look at a few of alfs other posts before i commented.