Function xpath_number

contrib/xml2/xpath.c:351–378

PG_FUNCTION_INFO_V1(xpath_number);

Datum
xpath_number(PG_FUNCTION_ARGS)
{
	text	   *document = PG_GETARG_TEXT_PP(0);
	text	   *xpathsupp = PG_GETARG_TEXT_PP(1);	/* XPath expression */
	xmlChar    *xpath;
	float4		fRes;
	xmlXPathObjectPtr res;
	xpath_workspace workspace;

	xpath = pgxml_texttoxmlchar(xpathsupp);

	res = pgxml_xpath(document, xpath, &workspace);

	pfree(xpath);

	if (res == NULL)
		PG_RETURN_NULL();

	fRes = xmlXPathCastToNumber(res);

	cleanup_workspace(&workspace);

	if (xmlXPathIsNaN(fRes))
		PG_RETURN_NULL();

	PG_RETURN_FLOAT4(fRes);
}


PG_FUNCTION_INFO_V1(xpath_bool);