topic problem with building dynamic resbuf list in ObjectARX Forum

problem with building dynamic resbuf list

Anonymous — Thu, 01 Apr 2004 12:13:29 GMT

I'd like to build a dynamic resbuf list, size of which is ranging from 1 to 100, take 4 for example :

struct resbuf *rb = acutBuildList(
AcDb::kDxfText, GetData(0), // GetData(0) is CString("a")
AcDb::kDxfText, GetData(1), // GetData(1) is CString("b")
AcDb::kDxfText, GetData(2), // GetData(2) is CString("c")
AcDb::kDxfText, GetData(3), // GetData(3) is CString("d")
0);

this *rb is no doubt equal to ("a","b","c","d")

I wrote the following code snippet, trying to do the work acutBuildList has done.

struct resbuf *pBegin, *pNode, *pPrior;
int size = GetArraySize(); // this returns 4
pBegin = acutNewRb(AcDb::kDxfText);
pBegin->resval.rstring = GetData(0).GetBuffer(100);
pBegin->rbnext = NULL;
pPrior = pBegin;
for(int j=1;j {
pNode = acutNewRb(AcDb::kDxfText);
pNode->resval.rstring = GetData(j).GetBuffer(100);
pPrior->rbnext = pNode;
pNode->rbnext = NULL;
pPrior = pNode;
}
return pBegin;

However it didn't work correctly, i got ("d","d","d","d") instead of ("a","b","c","d"). Help !

Re: problem with building dynamic resbuf list

Anonymous — Thu, 01 Apr 2004 13:34:10 GMT

Horace wrote: > I'd like to build a dynamic resbuf list, size of which is ranging from 1 to 100, take 4 for example : > > struct resbuf *rb = acutBuildList( > AcDb::kDxfText, GetData(0), // GetData(0) is CString("a") > AcDb::kDxfText, GetData(1), // GetData(1) is CString("b") > AcDb::kDxfText, GetData(2), // GetData(2) is CString("c") > AcDb::kDxfText, GetData(3), // GetData(3) is CString("d") > 0); > > this *rb is no doubt equal to ("a","b","c","d") > > I wrote the following code snippet, trying to do the work acutBuildList has done. > > struct resbuf *pBegin, *pNode, *pPrior; > int size = GetArraySize(); // this returns 4 > pBegin = acutNewRb(AcDb::kDxfText); > pBegin->resval.rstring = GetData(0).GetBuffer(100); > pBegin->rbnext = NULL; > pPrior = pBegin; > for(int j=1;j { > pNode = acutNewRb(AcDb::kDxfText); > pNode->resval.rstring = GetData(j).GetBuffer(100); > pPrior->rbnext = pNode; > pNode->rbnext = NULL; > pPrior = pNode; > } > return pBegin; > > However it didn't work correctly, i got ("d","d","d","d") instead of ("a","b","c","d"). Help ! resval.rstring should hold a copy of the string. Try this- pBegin->resval.rstring = strdup(GetData(0)); pNode->resval.rstring = strdup(GetData(j)); assuming GetData() returns a CString... -- Best regards, Byron Blattel CADwerx--Applications for AutoCAD Autodesk Registered Developer Contact Info @ http://www.cadwerx.net Custom Programming Services - ObjectARX/C++/MFC/ASP/STL/ATL/ISAPI...

Re: problem with building dynamic resbuf list

Anonymous — Thu, 01 Apr 2004 14:15:47 GMT

Hi Byron,

Gee, you're right again. Now it works fine. Thanks!!!

Horace