libxml2是否有XPath语法错误(XML\u XPath\u EXPR\u错误)的描述
我正在代码中实现libxml2xpathlibxml2是否有XPath语法错误(XML\u XPath\u EXPR\u错误)的描述,xml,xpath,libxml2,Xml,Xpath,Libxml2,我正在代码中实现libxml2xpath MSEXPORT int GetXpathXML(xmlDocPtr doc, xmlNodePtr node, xmlChar* xpathExpr, NodeRefsHdl NodeRefs) { #define ERR_OUT(x) {xmlXPathFreeObject(xpathObj); xmlXPathFreeContext(xpathCtx); return x;} if (doc == NULL) return(-1); /*
MSEXPORT int GetXpathXML(xmlDocPtr doc, xmlNodePtr node, xmlChar* xpathExpr, NodeRefsHdl NodeRefs)
{
#define ERR_OUT(x) {xmlXPathFreeObject(xpathObj); xmlXPathFreeContext(xpathCtx); return x;}
if (doc == NULL) return(-1);
/* Create xpath evaluation context */
xmlXPathContextPtr xpathCtx = xmlXPathNewContext(doc);
if(xpathCtx == NULL) return(-2);
/* Evaluate xpath expression. */
xmlXPathObjectPtr xpathObj = xmlXPathNodeEval((node == NULL ? xmlDocGetRootElement(doc): node), xpathExpr, xpathCtx);
if(xpathObj == NULL) {
snprintf(dan, BUFSZ, "Error %d: unable to evaluate xpath expression \"%s\"\n", (int) (xpathCtx->error), xpathExpr); DEBUG_MSG(dan);
ERR_OUT(-3);
}
当我故意发送此错误XPath时:
/*/*(一)
(xpathCtx->error)生成0,xmlGetLastError()生成XML\u XPATH\u EXPR\u错误
但是氧气给了我:
XPath失败,原因是:应为“”,找到“”
我可以从LibXML2中检索更多XPath语法错误信息吗?源代码的相关部分可以在以下位置找到: 所以答案是否定的。错误代码是libxml2的XPath表达式解析器提供的所有信息
if (CUR != ')') {
XP_ERROR(XPATH_EXPR_ERROR);
}