php-src/ext/dom/xpath.c

302 lines
7.7 KiB
C

/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_0.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Christian Stocker <chregu@php.net> |
| Rob Richards <rrichards@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#if HAVE_LIBXML && HAVE_DOM
#include "php_dom.h"
#define PHP_DOM_XPATH_QUERY 0
#define PHP_DOM_XPATH_EVALUATE 1
/*
* class DOMXPath
*/
#if defined(LIBXML_XPATH_ENABLED)
zend_function_entry php_dom_xpath_class_functions[] = {
PHP_ME(domxpath, __construct, NULL, ZEND_ACC_PUBLIC)
PHP_FALIAS(registerNamespace, dom_xpath_register_ns, NULL)
PHP_FALIAS(query, dom_xpath_query, NULL)
PHP_FALIAS(evaluate, dom_xpath_evaluate, NULL)
{NULL, NULL, NULL}
};
/* {{{ proto void DOMXPath::__construct(DOMDocument doc); */
PHP_METHOD(domxpath, __construct)
{
zval *id, *doc;
xmlDocPtr docp = NULL;
dom_object *docobj, *intern;
xmlXPathContextPtr ctx, oldctx;
php_set_error_handling(EH_THROW, dom_domexception_class_entry TSRMLS_CC);
if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "OO", &id, dom_xpath_class_entry, &doc, dom_document_class_entry) == FAILURE) {
php_std_error_handling();
return;
}
php_std_error_handling();
DOM_GET_OBJ(docp, doc, xmlDocPtr, docobj);
ctx = xmlXPathNewContext(docp);
if (ctx == NULL) {
php_dom_throw_error(INVALID_STATE_ERR, 1 TSRMLS_CC);
RETURN_FALSE;
}
intern = (dom_object *)zend_object_store_get_object(id TSRMLS_CC);
if (intern != NULL) {
oldctx = (xmlXPathContextPtr)intern->ptr;
if (oldctx != NULL) {
php_libxml_decrement_doc_ref((php_libxml_node_object *)intern TSRMLS_CC);
xmlXPathFreeContext(oldctx);
}
intern->ptr = ctx;
intern->document = docobj->document;
php_libxml_increment_doc_ref((php_libxml_node_object *)intern, docp TSRMLS_CC);
}
}
/* }}} end DOMXPath::__construct */
/* {{{ proto document DOMDocument*/
int dom_xpath_document_read(dom_object *obj, zval **retval TSRMLS_DC)
{
xmlDoc *docp = NULL;
xmlXPathContextPtr ctx;
int ret;
ctx = (xmlXPathContextPtr) obj->ptr;
if (ctx) {
docp = (xmlDocPtr) ctx->doc;
}
ALLOC_ZVAL(*retval);
if (NULL == (*retval = php_dom_create_object((xmlNodePtr) docp, &ret, NULL, *retval, obj TSRMLS_CC))) {
php_error(E_WARNING, "Cannot create required DOM object");
return FAILURE;
}
return SUCCESS;
}
/* {{{ proto boolean dom_xpath_register_ns(string prefix, string uri); */
PHP_FUNCTION(dom_xpath_register_ns)
{
zval *id;
xmlXPathContextPtr ctxp;
int prefix_len, ns_uri_len;
dom_object *intern;
unsigned char *prefix, *ns_uri;
if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Oss", &id, dom_xpath_class_entry, &prefix, &prefix_len, &ns_uri, &ns_uri_len) == FAILURE) {
return;
}
intern = (dom_object *)zend_object_store_get_object(id TSRMLS_CC);
ctxp = (xmlXPathContextPtr) intern->ptr;
if (ctxp == NULL) {
php_error(E_WARNING, "Invalid XPath Context");
RETURN_FALSE;
}
if (xmlXPathRegisterNs(ctxp, prefix, ns_uri) != 0) {
RETURN_FALSE
}
RETURN_TRUE;
}
static void dom_xpath_iter(zval *baseobj, dom_object *intern)
{
dom_nnodemap_object *mapptr;
mapptr = (dom_nnodemap_object *)intern->ptr;
mapptr->baseobjptr = baseobj;
mapptr->nodetype = DOM_NODESET;
}
static void php_xpath_eval(INTERNAL_FUNCTION_PARAMETERS, int type) {
zval *id, *retval, *context = NULL;
xmlXPathContextPtr ctxp;
xmlNodePtr nodep = NULL;
xmlXPathObjectPtr xpathobjp;
int expr_len, ret, nsnbr = 0, xpath_type;
dom_object *intern, *nodeobj;
char *expr;
xmlDoc *docp = NULL;
xmlNsPtr *ns;
if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os|O", &id, dom_xpath_class_entry, &expr, &expr_len, &context, dom_node_class_entry) == FAILURE) {
return;
}
intern = (dom_object *)zend_object_store_get_object(id TSRMLS_CC);
ctxp = (xmlXPathContextPtr) intern->ptr;
if (ctxp == NULL) {
php_error(E_WARNING, "Invalid XPath Context");
RETURN_FALSE;
}
docp = (xmlDocPtr) ctxp->doc;
if (docp == NULL) {
php_error(E_WARNING, "Invalid XPath Document Pointer");
RETURN_FALSE;
}
if (context != NULL) {
DOM_GET_OBJ(nodep, context, xmlNodePtr, nodeobj);
}
if (!nodep) {
nodep = xmlDocGetRootElement(docp);
}
if (nodep && docp != nodep->doc) {
php_error(E_WARNING, "Node From Wrong Document");
RETURN_FALSE;
}
ctxp->node = nodep;
/* Register namespaces in the node */
ns = xmlGetNsList(docp, nodep);
if (ns != NULL) {
while (ns[nsnbr] != NULL)
nsnbr++;
}
ctxp->namespaces = ns;
ctxp->nsNr = nsnbr;
xpathobjp = xmlXPathEvalExpression(expr, ctxp);
ctxp->node = NULL;
if (ns != NULL) {
xmlFree(ns);
ctxp->namespaces = NULL;
ctxp->nsNr = 0;
}
if (! xpathobjp) {
RETURN_FALSE;
}
if (type == PHP_DOM_XPATH_QUERY) {
xpath_type = XPATH_NODESET;
} else {
xpath_type = xpathobjp->type;
}
switch (xpath_type) {
case XPATH_NODESET:
{
int i;
xmlNodeSetPtr nodesetp;
MAKE_STD_ZVAL(retval);
array_init(retval);
if (xpathobjp->type == XPATH_NODESET && NULL != (nodesetp = xpathobjp->nodesetval)) {
for (i = 0; i < nodesetp->nodeNr; i++) {
xmlNodePtr node = nodesetp->nodeTab[i];
zval *child;
MAKE_STD_ZVAL(child);
if (node->type == XML_NAMESPACE_DECL) {
xmlNsPtr curns;
xmlNodePtr nsparent;
nsparent = node->_private;
curns = xmlNewNs(NULL, node->name, NULL);
if (node->children) {
curns->prefix = xmlStrdup((char *) node->children);
}
if (node->children) {
node = xmlNewDocNode(docp, NULL, (char *) node->children, node->name);
} else {
node = xmlNewDocNode(docp, NULL, "xmlns", node->name);
}
node->type = XML_NAMESPACE_DECL;
node->parent = nsparent;
node->ns = curns;
}
child = php_dom_create_object(node, &ret, NULL, child, intern TSRMLS_CC);
add_next_index_zval(retval, child);
}
}
php_dom_create_interator(return_value, DOM_NODELIST TSRMLS_CC);
intern = (dom_object *)zend_objects_get_address(return_value TSRMLS_CC);
dom_xpath_iter(retval, intern);
break;
}
case XPATH_BOOLEAN:
RETVAL_BOOL(xpathobjp->boolval);
break;
case XPATH_NUMBER:
RETVAL_DOUBLE(xpathobjp->floatval)
break;
case XPATH_STRING:
RETVAL_STRING(xpathobjp->stringval, 1);
break;
default:
RETVAL_NULL();
break;
}
xmlXPathFreeObject(xpathobjp);
}
/* {{{ proto DOMNodeList dom_xpath_query(string expr [,DOMNode context]); */
PHP_FUNCTION(dom_xpath_query)
{
php_xpath_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_DOM_XPATH_QUERY);
}
/* }}} end dom_xpath_query */
/* {{{ proto mixed dom_xpath_evaluate(string expr [,DOMNode context]); */
PHP_FUNCTION(dom_xpath_evaluate)
{
php_xpath_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_DOM_XPATH_EVALUATE);
}
/* }}} end dom_xpath_evaluate */
#endif /* LIBXML_XPATH_ENABLED */
/* }}} */
#endif