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php-src/ext/dom/xpath.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2013 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 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_01.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)
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_dom_xpath_construct, 0, 0, 1)
ZEND_ARG_OBJ_INFO(0, doc, DOMDocument, 0)
ZEND_END_ARG_INFO();
ZEND_BEGIN_ARG_INFO_EX(arginfo_dom_xpath_register_ns, 0, 0, 2)
ZEND_ARG_INFO(0, prefix)
ZEND_ARG_INFO(0, uri)
ZEND_END_ARG_INFO();
ZEND_BEGIN_ARG_INFO_EX(arginfo_dom_xpath_query, 0, 0, 1)
ZEND_ARG_INFO(0, expr)
ZEND_ARG_OBJ_INFO(0, context, DOMNode, 1)
ZEND_ARG_INFO(0, registerNodeNS)
ZEND_END_ARG_INFO();
ZEND_BEGIN_ARG_INFO_EX(arginfo_dom_xpath_evaluate, 0, 0, 1)
ZEND_ARG_INFO(0, expr)
ZEND_ARG_OBJ_INFO(0, context, DOMNode, 1)
ZEND_ARG_INFO(0, registerNodeNS)
ZEND_END_ARG_INFO();
ZEND_BEGIN_ARG_INFO_EX(arginfo_dom_xpath_register_php_functions, 0, 0, 0)
ZEND_END_ARG_INFO();
/* }}} */
const zend_function_entry php_dom_xpath_class_functions[] = {
PHP_ME(domxpath, __construct, arginfo_dom_xpath_construct, ZEND_ACC_PUBLIC)
PHP_FALIAS(registerNamespace, dom_xpath_register_ns, arginfo_dom_xpath_register_ns)
PHP_FALIAS(query, dom_xpath_query, arginfo_dom_xpath_query)
PHP_FALIAS(evaluate, dom_xpath_evaluate, arginfo_dom_xpath_evaluate)
PHP_FALIAS(registerPhpFunctions, dom_xpath_register_php_functions, arginfo_dom_xpath_register_php_functions)
PHP_FE_END
};
static void dom_xpath_ext_function_php(xmlXPathParserContextPtr ctxt, int nargs, int type) /* {{{ */
{
zval **args = NULL;
zval *retval;
int result, i, ret;
int error = 0;
zend_fcall_info fci;
zval handler;
xmlXPathObjectPtr obj;
char *str;
char *callable = NULL;
dom_xpath_object *intern;
TSRMLS_FETCH();
if (! zend_is_executing(TSRMLS_C)) {
xmlGenericError(xmlGenericErrorContext,
"xmlExtFunctionTest: Function called from outside of PHP\n");
error = 1;
} else {
intern = (dom_xpath_object *) ctxt->context->userData;
if (intern == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlExtFunctionTest: failed to get the internal object\n");
error = 1;
}
else if (intern->registerPhpFunctions == 0) {
xmlGenericError(xmlGenericErrorContext,
"xmlExtFunctionTest: PHP Object did not register PHP functions\n");
error = 1;
}
}
if (error == 1) {
for (i = nargs - 1; i >= 0; i--) {
obj = valuePop(ctxt);
xmlXPathFreeObject(obj);
}
return;
}
fci.param_count = nargs - 1;
if (fci.param_count > 0) {
fci.params = safe_emalloc(fci.param_count, sizeof(zval**), 0);
args = safe_emalloc(fci.param_count, sizeof(zval *), 0);
}
/* Reverse order to pop values off ctxt stack */
for (i = nargs - 2; i >= 0; i--) {
obj = valuePop(ctxt);
MAKE_STD_ZVAL(args[i]);
switch (obj->type) {
case XPATH_STRING:
ZVAL_STRING(args[i], (char *)obj->stringval, 1);
break;
case XPATH_BOOLEAN:
ZVAL_BOOL(args[i], obj->boolval);
break;
case XPATH_NUMBER:
ZVAL_DOUBLE(args[i], obj->floatval);
break;
case XPATH_NODESET:
if (type == 1) {
str = (char *)xmlXPathCastToString(obj);
ZVAL_STRING(args[i], str, 1);
xmlFree(str);
} else if (type == 2) {
int j;
array_init(args[i]);
if (obj->nodesetval && obj->nodesetval->nodeNr > 0) {
for (j = 0; j < obj->nodesetval->nodeNr; j++) {
xmlNodePtr node = obj->nodesetval->nodeTab[j];
zval *child;
MAKE_STD_ZVAL(child);
/* not sure, if we need this... it's copied from xpath.c */
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((xmlChar *) node->children);
}
if (node->children) {
node = xmlNewDocNode(node->doc, NULL, (xmlChar *) node->children, node->name);
} else {
node = xmlNewDocNode(node->doc, NULL, (xmlChar *) "xmlns", node->name);
}
node->type = XML_NAMESPACE_DECL;
node->parent = nsparent;
node->ns = curns;
}
child = php_dom_create_object(node, &ret, child, (dom_object *)intern TSRMLS_CC);
add_next_index_zval(args[i], child);
}
}
}
break;
default:
ZVAL_STRING(args[i], (char *)xmlXPathCastToString(obj), 1);
}
xmlXPathFreeObject(obj);
fci.params[i] = &args[i];
}
fci.size = sizeof(fci);
fci.function_table = EG(function_table);
obj = valuePop(ctxt);
if (obj->stringval == NULL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Handler name must be a string");
xmlXPathFreeObject(obj);
if (fci.param_count > 0) {
for (i = 0; i < nargs - 1; i++) {
zval_ptr_dtor(&args[i]);
}
efree(args);
efree(fci.params);
}
return;
}
INIT_PZVAL(&handler);
ZVAL_STRING(&handler, obj->stringval, 1);
xmlXPathFreeObject(obj);
fci.function_name = &handler;
fci.symbol_table = NULL;
fci.object_ptr = NULL;
fci.retval_ptr_ptr = &retval;
fci.no_separation = 0;
if (!zend_make_callable(&handler, &callable TSRMLS_CC)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call handler %s()", callable);
} else if ( intern->registerPhpFunctions == 2 && zend_hash_exists(intern->registered_phpfunctions, callable, strlen(callable) + 1) == 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Not allowed to call handler '%s()'.", callable);
/* Push an empty string, so that we at least have an xslt result... */
valuePush(ctxt, xmlXPathNewString((xmlChar *)""));
} else {
result = zend_call_function(&fci, NULL TSRMLS_CC);
if (result == FAILURE) {
if (Z_TYPE(handler) == IS_STRING) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to call handler %s()", Z_STRVAL_P(&handler));
}
/* retval is == NULL, when an exception occurred, don't report anything, because PHP itself will handle that */
} else if (retval == NULL) {
} else {
if (retval->type == IS_OBJECT && instanceof_function( Z_OBJCE_P(retval), dom_node_class_entry TSRMLS_CC)) {
xmlNode *nodep;
dom_object *obj;
if (intern->node_list == NULL) {
ALLOC_HASHTABLE(intern->node_list);
zend_hash_init(intern->node_list, 0, NULL, ZVAL_PTR_DTOR, 0);
}
zval_add_ref(&retval);
zend_hash_next_index_insert(intern->node_list, &retval, sizeof(zval *), NULL);
obj = (dom_object *)zend_object_store_get_object(retval TSRMLS_CC);
nodep = dom_object_get_node(obj);
valuePush(ctxt, xmlXPathNewNodeSet(nodep));
} else if (retval->type == IS_BOOL) {
valuePush(ctxt, xmlXPathNewBoolean(retval->value.lval));
} else if (retval->type == IS_OBJECT) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "A PHP Object cannot be converted to a XPath-string");
valuePush(ctxt, xmlXPathNewString((xmlChar *)""));
} else {
convert_to_string_ex(&retval);
valuePush(ctxt, xmlXPathNewString( Z_STRVAL_P(retval)));
}
zval_ptr_dtor(&retval);
}
}
efree(callable);
zval_dtor(&handler);
if (fci.param_count > 0) {
for (i = 0; i < nargs - 1; i++) {
zval_ptr_dtor(&args[i]);
}
efree(args);
efree(fci.params);
}
}
/* }}} */
static void dom_xpath_ext_function_string_php(xmlXPathParserContextPtr ctxt, int nargs) /* {{{ */
{
dom_xpath_ext_function_php(ctxt, nargs, 1);
}
/* }}} */
static void dom_xpath_ext_function_object_php(xmlXPathParserContextPtr ctxt, int nargs) /* {{{ */
{
dom_xpath_ext_function_php(ctxt, nargs, 2);
}
/* }}} */
/* {{{ proto void DOMXPath::__construct(DOMDocument doc) U */
PHP_METHOD(domxpath, __construct)
{
zval *id, *doc;
xmlDocPtr docp = NULL;
dom_object *docobj;
dom_xpath_object *intern;
xmlXPathContextPtr ctx, oldctx;
zend_error_handling error_handling;
zend_replace_error_handling(EH_THROW, dom_domexception_class_entry, &error_handling 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) {
zend_restore_error_handling(&error_handling TSRMLS_CC);
return;
}
zend_restore_error_handling(&error_handling TSRMLS_CC);
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_xpath_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);
}
xmlXPathRegisterFuncNS (ctx, (const xmlChar *) "functionString",
(const xmlChar *) "http://php.net/xpath",
dom_xpath_ext_function_string_php);
xmlXPathRegisterFuncNS (ctx, (const xmlChar *) "function",
(const xmlChar *) "http://php.net/xpath",
dom_xpath_ext_function_object_php);
intern->ptr = ctx;
ctx->userData = (void *)intern;
intern->document = docobj->document;
php_libxml_increment_doc_ref((php_libxml_node_object *)intern, docp TSRMLS_CC);
}
}
/* }}} end DOMXPath::__construct */
/* {{{ document DOMDocument*/
int dom_xpath_document_read(dom_object *obj, zval **retval TSRMLS_DC)
{
xmlDoc *docp = NULL;
xmlXPathContextPtr ctx;
int ret;
zval *tmp;
ctx = (xmlXPathContextPtr) obj->ptr;
if (ctx) {
docp = (xmlDocPtr) ctx->doc;
}
ALLOC_ZVAL(*retval);
tmp = *retval;
if (NULL == (*retval = php_dom_create_object((xmlNodePtr) docp, &ret, *retval, obj TSRMLS_CC))) {
FREE_ZVAL(tmp);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot create required DOM object");
return FAILURE;
}
if (tmp != *retval) {
FREE_ZVAL(tmp);
}
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_xpath_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_xpath_object *)zend_object_store_get_object(id TSRMLS_CC);
ctxp = (xmlXPathContextPtr) intern->ptr;
if (ctxp == NULL) {
php_error_docref(NULL TSRMLS_CC, 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_xpath_object *intern;
dom_object *nodeobj;
char *expr;
xmlDoc *docp = NULL;
xmlNsPtr *ns = NULL;
zend_bool register_node_ns = 1;
if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os|O!b", &id, dom_xpath_class_entry, &expr, &expr_len, &context, dom_node_class_entry, &register_node_ns) == FAILURE) {
return;
}
intern = (dom_xpath_object *)zend_object_store_get_object(id TSRMLS_CC);
ctxp = (xmlXPathContextPtr) intern->ptr;
if (ctxp == NULL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid XPath Context");
RETURN_FALSE;
}
docp = (xmlDocPtr) ctxp->doc;
if (docp == NULL) {
php_error_docref(NULL TSRMLS_CC, 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_docref(NULL TSRMLS_CC, E_WARNING, "Node From Wrong Document");
RETURN_FALSE;
}
ctxp->node = nodep;
if (register_node_ns) {
/* 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, child, (dom_object *)intern TSRMLS_CC);
add_next_index_zval(retval, child);
}
}
php_dom_create_interator(return_value, DOM_NODELIST TSRMLS_CC);
nodeobj = (dom_object *)zend_objects_get_address(return_value TSRMLS_CC);
dom_xpath_iter(retval, nodeobj);
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 [, boolean registerNodeNS]]); */
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 [, boolean registerNodeNS]]); */
PHP_FUNCTION(dom_xpath_evaluate)
{
php_xpath_eval(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_DOM_XPATH_EVALUATE);
}
/* }}} end dom_xpath_evaluate */
/* {{{ proto void dom_xpath_register_php_functions() */
PHP_FUNCTION(dom_xpath_register_php_functions)
{
zval *id;
dom_xpath_object *intern;
zval *array_value, **entry, *new_string;
int name_len = 0;
char *name;
DOM_GET_THIS(id);
if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "a", &array_value) == SUCCESS) {
intern = (dom_xpath_object *)zend_object_store_get_object(id TSRMLS_CC);
zend_hash_internal_pointer_reset(Z_ARRVAL_P(array_value));
while (zend_hash_get_current_data(Z_ARRVAL_P(array_value), (void **)&entry) == SUCCESS) {
SEPARATE_ZVAL(entry);
convert_to_string_ex(entry);
MAKE_STD_ZVAL(new_string);
ZVAL_LONG(new_string,1);
zend_hash_update(intern->registered_phpfunctions, Z_STRVAL_PP(entry), Z_STRLEN_PP(entry) + 1, &new_string, sizeof(zval*), NULL);
zend_hash_move_forward(Z_ARRVAL_P(array_value));
}
intern->registerPhpFunctions = 2;
RETURN_TRUE;
} else if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "s", &name, &name_len) == SUCCESS) {
intern = (dom_xpath_object *)zend_object_store_get_object(id TSRMLS_CC);
MAKE_STD_ZVAL(new_string);
ZVAL_LONG(new_string,1);
zend_hash_update(intern->registered_phpfunctions, name, name_len + 1, &new_string, sizeof(zval*), NULL);
intern->registerPhpFunctions = 2;
} else {
intern = (dom_xpath_object *)zend_object_store_get_object(id TSRMLS_CC);
intern->registerPhpFunctions = 1;
}
}
/* }}} end dom_xpath_register_php_functions */
#endif /* LIBXML_XPATH_ENABLED */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
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