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Dark GDK / C++ problem LPSTR to char[]

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david w
18
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Joined: 18th Dec 2005
Location: U.S.A. Michigan
Posted: 31st Jan 2009 16:48
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I have a LPSTR pointer to a filename "colormap.png" and I want to store this into a char[] so I can do something like this...

I know that LPSTR is equal to char*
What I dont know is how to get that information into char[]


if(myfilename == "colormap.png")
{
//do something here
}

thank you.
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dark coder
21
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Joined: 6th Oct 2002
Location: Japan
Posted: 31st Jan 2009 16:52
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Use strcmp() to compare c-style strings, where a return value of 0 means they match, otherwise you're just comparing the addresses of the char*.

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IanM
Retired Moderator
22
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Joined: 11th Sep 2002
Location: In my moon base
Posted: 31st Jan 2009 16:55
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Quote: "if(myfilename == "colormap.png")"

That only works in VC++ in release mode if you have string pooling enabled, and assigned your variable from another constant string with exactly the same length and case. Even then, that's not a guarantee.

Utility plug-ins collection (updated 29/12/08) and
http://www.matrix1.demon.co.uk
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david w
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Joined: 18th Dec 2005
Location: U.S.A. Michigan
Posted: 31st Jan 2009 19:05 Edited at: 31st Jan 2009 19:05
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ok then so if that wont work then how am I suppose to test if its true?

could I do something like this.

//myfilename is a pointer to LPSTR..that points to a filename
//so myfilename is equal to char*

myfilename

char *MyString= "color.png";


if(strcmp (myfilename,MyString) == 0)
{
//do something
}
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david w
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Location: U.S.A. Michigan
Posted: 31st Jan 2009 19:08
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Ok I got it working thanks DC and IanM.
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jason p sage
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Joined: 10th Jun 2007
Location: Ellington, CT USA
Posted: 1st Feb 2009 00:09 Edited at: 1st Feb 2009 00:10
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Or Look at how JFC_STRING does it Bro!
--Jason

[edit]and JFC_STRINGW[/edit]


http://www.jasonpetersage.com/?PAGE=ironinfantry&SECTION=ironinfantry
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