Re: [xslt] Extension Function Implementation

2021-10-05 Thread Nick Wellnhofer via xslt 
You have to create and register a "result value tree" by calling xsltCreateRVT 
and xsltRegisterLocalRVT, then add the nodes you want to return to that tree. 
Have a look at functions like exsltStrTokenizeFunction to see how it works:


https://gitlab.gnome.org/GNOME/libxslt/-/blob/master/libexslt/strings.c

Hope that helps,
Nick


On 05/10/2021 12:30, Андрей Олешкевич via xslt wrote:
I am trying to create an xslt extension function for libxslt (c++). My 
extension function takes a string as input, then this string is parsed by xml 
parser, and the function returns this parsed xml. I return value by this 
expression:


void fnParse(xmlXPathParserContextPtr ctx, int nargs) { ... 
xmlXPathReturnNodeSet(ctx, xmlXPathNodeSetCreate(node)); }


But I have found that libxslt does not free node memory after use. It free 
xmlNodeSet, but not free the node which is stored in this nodeset. Perhaps I 
missed something important. What is the correct way to return an XML node in 
the extension function?

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[xslt] Extension Function Implementation

2021-10-05 Thread Андрей Олешкевич via xslt 
I am trying to create an xslt extension function for libxslt (c++). My
extension function takes a string as input, then this string is parsed by
xml parser, and the function returns this parsed xml. I return value by
this expression:

void fnParse(xmlXPathParserContextPtr ctx, int nargs) { ...
xmlXPathReturnNodeSet(ctx, xmlXPathNodeSetCreate(node)); }

But I have found that libxslt does not free node memory after use. It free
xmlNodeSet, but not free the node which is stored in this nodeset. Perhaps
I missed something important. What is the correct way to return an XML node
in the extension function?
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