Function xmlXPathEvalExpr

ThirdParty/libxml2/vtklibxml2/xpath.c:13227–13275

* xmlXPathEvalExpr: * @ctxt: the XPath Parser context * * Parse and evaluate an XPath expression in the given context, * then push the result on the context stack */

 * then push the result on the context stack
 */
void
xmlXPathEvalExpr(xmlXPathParserContextPtr ctxt) {
#ifdef XPATH_STREAMING
    xmlXPathCompExprPtr comp;
#endif
    int oldDepth = 0;

    if (ctxt == NULL)
        return;
    if (ctxt->context->lastError.code != 0)
        return;

#ifdef XPATH_STREAMING
    comp = xmlXPathTryStreamCompile(ctxt->context, ctxt->base);
    if ((comp == NULL) &&
        (ctxt->context->lastError.code == XML_ERR_NO_MEMORY)) {
        xmlXPathPErrMemory(ctxt);
        return;
    }
    if (comp != NULL) {
        if (ctxt->comp != NULL)
	    xmlXPathFreeCompExpr(ctxt->comp);
        ctxt->comp = comp;
    } else
#endif
    {
        if (ctxt->context != NULL)
            oldDepth = ctxt->context->depth;
	xmlXPathCompileExpr(ctxt, 1);
        if (ctxt->context != NULL)
            ctxt->context->depth = oldDepth;
        CHECK_ERROR;

        /* Check for trailing characters. */
        if (*ctxt->cur != 0)
            XP_ERROR(XPATH_EXPR_ERROR);

	if ((ctxt->comp->nbStep > 1) && (ctxt->comp->last >= 0)) {
            if (ctxt->context != NULL)
                oldDepth = ctxt->context->depth;
	    xmlXPathOptimizeExpression(ctxt,
		&ctxt->comp->steps[ctxt->comp->last]);
            if (ctxt->context != NULL)
                ctxt->context->depth = oldDepth;
        }
    }

    xmlXPathRunEval(ctxt, 0);
}

/**
 * xmlXPathEval: