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php_xmlreader.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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. |
+----------------------------------------------------------------------+
| Author: Rob Richards <rrichards@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "zend_observer.h"
#include "php_xmlreader.h"
#ifdef HAVE_DOM
#include "ext/dom/xml_common.h"
#include "ext/dom/dom_ce.h"
#endif
#include <libxml/xmlreader.h>
#include <libxml/uri.h>
#include "php_xmlreader_arginfo.h"
zend_class_entry *xmlreader_class_entry;
static zend_object_handlers xmlreader_object_handlers;
static HashTable xmlreader_prop_handlers;
static zend_internal_function xmlreader_open_fn;
static zend_internal_function xmlreader_xml_fn;
typedef int (*xmlreader_read_int_t)(xmlTextReaderPtr reader);
typedef unsigned char *(*xmlreader_read_char_t)(xmlTextReaderPtr reader);
typedef const unsigned char *(*xmlreader_read_const_char_t)(xmlTextReaderPtr reader);
typedef unsigned char *(*xmlreader_read_one_char_t)(xmlTextReaderPtr reader, const unsigned char *);
typedef struct _xmlreader_prop_handler {
xmlreader_read_int_t read_int_func;
xmlreader_read_const_char_t read_char_func;
int type;
} xmlreader_prop_handler;
#define XMLREADER_LOAD_STRING 0
#define XMLREADER_LOAD_FILE 1
static void xmlreader_register_prop_handler(HashTable *prop_handler, const char *name, size_t name_len, const xmlreader_prop_handler *hnd)
{
zend_string *str = zend_string_init_interned(name, name_len, true);
zend_hash_add_new_ptr(prop_handler, str, (void *) hnd);
zend_string_release_ex(str, true);
}
#define XMLREADER_REGISTER_PROP_HANDLER(prop_handler, name, prop_read_int_func, prop_read_char_func, prop_type) do { \
static const xmlreader_prop_handler hnd = {.read_int_func = prop_read_int_func, .read_char_func = prop_read_char_func, .type = prop_type}; \
xmlreader_register_prop_handler(prop_handler, "" name, sizeof("" name) - 1, &hnd); \
} while (0)
/* {{{ xmlreader_property_reader */
static int xmlreader_property_reader(xmlreader_object *obj, xmlreader_prop_handler *hnd, zval *rv)
{
const xmlChar *retchar = NULL;
int retint = 0;
if (obj->ptr != NULL) {
if (hnd->read_char_func) {
retchar = hnd->read_char_func(obj->ptr);
} else {
if (hnd->read_int_func) {
retint = hnd->read_int_func(obj->ptr);
if (retint == -1) {
zend_throw_error(NULL, "Failed to read property because no XML data has been read yet");
return FAILURE;
}
}
}
}
switch (hnd->type) {
case IS_STRING:
if (retchar) {
ZVAL_STRING(rv, (char *) retchar);
} else {
ZVAL_EMPTY_STRING(rv);
}
break;
case _IS_BOOL:
ZVAL_BOOL(rv, retint);
break;
case IS_LONG:
ZVAL_LONG(rv, retint);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return SUCCESS;
}
/* }}} */
/* {{{ xmlreader_get_property_ptr_ptr */
zval *xmlreader_get_property_ptr_ptr(zend_object *object, zend_string *name, int type, void **cache_slot)
{
zval *retval = NULL;
xmlreader_prop_handler *hnd = zend_hash_find_ptr(&xmlreader_prop_handlers, name);
if (hnd == NULL) {
retval = zend_std_get_property_ptr_ptr(object, name, type, cache_slot);
}
return retval;
}
/* }}} */
/* {{{ xmlreader_read_property */
zval *xmlreader_read_property(zend_object *object, zend_string *name, int type, void **cache_slot, zval *rv)
{
zval *retval = NULL;
xmlreader_object *obj = php_xmlreader_fetch_object(object);
xmlreader_prop_handler *hnd = zend_hash_find_ptr(&xmlreader_prop_handlers, name);
if (hnd != NULL) {
if (xmlreader_property_reader(obj, hnd, rv) == FAILURE) {
retval = &EG(uninitialized_zval);
} else {
retval = rv;
}
} else {
retval = zend_std_read_property(object, name, type, cache_slot, rv);
}
return retval;
}
/* }}} */
/* {{{ xmlreader_write_property */
zval *xmlreader_write_property(zend_object *object, zend_string *name, zval *value, void **cache_slot)
{
xmlreader_prop_handler *hnd = zend_hash_find_ptr(&xmlreader_prop_handlers, name);
if (hnd != NULL) {
zend_readonly_property_modification_error_ex(ZSTR_VAL(object->ce->name), ZSTR_VAL(name));
} else {
value = zend_std_write_property(object, name, value, cache_slot);
}
return value;
}
/* }}} */
/* {{{ */
static zend_function *xmlreader_get_method(zend_object **obj, zend_string *name, const zval *key)
{
zend_function *method = zend_std_get_method(obj, name, key);
if (method && (method->common.fn_flags & ZEND_ACC_STATIC) && method->common.type == ZEND_INTERNAL_FUNCTION) {
/* There are only two static internal methods and they both have overrides. */
if (ZSTR_LEN(name) == sizeof("xml") - 1) {
return (zend_function *) &xmlreader_xml_fn;
} else if (ZSTR_LEN(name) == sizeof("open") - 1) {
return (zend_function *) &xmlreader_open_fn;
}
}
return method;
}
/* }}} */
static HashTable* xmlreader_get_debug_info(zend_object *object, int *is_temp)
{
*is_temp = 1;
xmlreader_object *obj = php_xmlreader_fetch_object(object);
HashTable *std_props = zend_std_get_properties(object);
HashTable *debug_info = zend_array_dup(std_props);
zend_string *string_key;
xmlreader_prop_handler *entry;
ZEND_HASH_MAP_FOREACH_STR_KEY_PTR(&xmlreader_prop_handlers, string_key, entry) {
ZEND_ASSERT(string_key != NULL);
zval value;
if (xmlreader_property_reader(obj, entry, &value) == SUCCESS) {
zend_hash_update(debug_info, string_key, &value);
}
} ZEND_HASH_FOREACH_END();
return debug_info;
}
/* {{{ _xmlreader_get_valid_file_path */
/* _xmlreader_get_valid_file_path and _xmlreader_get_relaxNG should be made a
common function in libxml extension as code is common to a few xml extensions */
char *_xmlreader_get_valid_file_path(char *source, char *resolved_path, int resolved_path_len ) {
xmlURI *uri;
xmlChar *escsource;
char *file_dest;
int isFileUri = 0;
uri = xmlCreateURI();
if (uri == NULL) {
return NULL;
}
escsource = xmlURIEscapeStr((xmlChar *)source, (xmlChar *)":");
xmlParseURIReference(uri, (const char *)escsource);
xmlFree(escsource);
if (uri->scheme != NULL) {
/* absolute file uris - libxml only supports localhost or empty host */
if (strncasecmp(source, "file:///",8) == 0) {
isFileUri = 1;
#ifdef PHP_WIN32
source += 8;
#else
source += 7;
#endif
} else if (strncasecmp(source, "file://localhost/",17) == 0) {
isFileUri = 1;
#ifdef PHP_WIN32
source += 17;
#else
source += 16;
#endif
}
}
file_dest = source;
if ((uri->scheme == NULL || isFileUri)) {
if (!VCWD_REALPATH(source, resolved_path) && !expand_filepath(source, resolved_path)) {
xmlFreeURI(uri);
return NULL;
}
file_dest = resolved_path;
}
xmlFreeURI(uri);
return file_dest;
}
/* }}} */
#ifdef LIBXML_SCHEMAS_ENABLED
/* {{{ _xmlreader_get_relaxNG */
static xmlRelaxNGPtr _xmlreader_get_relaxNG(char *source, size_t source_len, size_t type,
xmlRelaxNGValidityErrorFunc error_func,
xmlRelaxNGValidityWarningFunc warn_func)
{
char *valid_file = NULL;
xmlRelaxNGParserCtxtPtr parser = NULL;
xmlRelaxNGPtr sptr;
char resolved_path[MAXPATHLEN + 1];
switch (type) {
case XMLREADER_LOAD_FILE:
valid_file = _xmlreader_get_valid_file_path(source, resolved_path, MAXPATHLEN );
if (!valid_file) {
return NULL;
}
parser = xmlRelaxNGNewParserCtxt(valid_file);
break;
case XMLREADER_LOAD_STRING:
parser = xmlRelaxNGNewMemParserCtxt(source, source_len);
/* If loading from memory, we need to set the base directory for the document
but it is not apparent how to do that for schema's */
break;
default:
return NULL;
}
if (parser == NULL) {
return NULL;
}
PHP_LIBXML_SANITIZE_GLOBALS(parse);
if (error_func || warn_func) {
xmlRelaxNGSetParserErrors(parser,
(xmlRelaxNGValidityErrorFunc) error_func,
(xmlRelaxNGValidityWarningFunc) warn_func,
parser);
}
sptr = xmlRelaxNGParse(parser);
xmlRelaxNGFreeParserCtxt(parser);
PHP_LIBXML_RESTORE_GLOBALS(parse);
return sptr;
}
/* }}} */
#endif
static const zend_module_dep xmlreader_deps[] = {
#ifdef HAVE_DOM
ZEND_MOD_REQUIRED("dom")
#endif
ZEND_MOD_REQUIRED("libxml")
ZEND_MOD_END
};
/* {{{ xmlreader_module_entry */
zend_module_entry xmlreader_module_entry = {
STANDARD_MODULE_HEADER_EX, NULL,
xmlreader_deps,
"xmlreader",
NULL,
PHP_MINIT(xmlreader),
PHP_MSHUTDOWN(xmlreader),
NULL,
NULL,
PHP_MINFO(xmlreader),
PHP_XMLREADER_VERSION,
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_XMLREADER
ZEND_GET_MODULE(xmlreader)
#endif
/* {{{ xmlreader_free_resources */
static void xmlreader_free_resources(xmlreader_object *intern) {
if (intern->input) {
xmlFreeParserInputBuffer(intern->input);
intern->input = NULL;
}
if (intern->ptr) {
xmlFreeTextReader(intern->ptr);
intern->ptr = NULL;
}
#ifdef LIBXML_SCHEMAS_ENABLED
if (intern->schema) {
xmlRelaxNGFree((xmlRelaxNGPtr) intern->schema);
intern->schema = NULL;
}
#endif
}
/* }}} */
/* {{{ xmlreader_objects_free_storage */
void xmlreader_objects_free_storage(zend_object *object)
{
xmlreader_object *intern = php_xmlreader_fetch_object(object);
zend_object_std_dtor(&intern->std);
xmlreader_free_resources(intern);
}
/* }}} */
/* {{{ xmlreader_objects_new */
zend_object *xmlreader_objects_new(zend_class_entry *class_type)
{
xmlreader_object *intern;
intern = zend_object_alloc(sizeof(xmlreader_object), class_type);
zend_object_std_init(&intern->std, class_type);
object_properties_init(&intern->std, class_type);
return &intern->std;
}
/* }}} */
/* {{{ php_xmlreader_string_arg */
static void php_xmlreader_string_arg(INTERNAL_FUNCTION_PARAMETERS, xmlreader_read_one_char_t internal_function) {
zval *id;
size_t name_len = 0;
char *retchar = NULL;
xmlreader_object *intern;
char *name;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &name, &name_len) == FAILURE) {
RETURN_THROWS();
}
if (!name_len) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retchar = (char *)internal_function(intern->ptr, (const unsigned char *)name);
}
if (retchar) {
RETVAL_STRING(retchar);
xmlFree(retchar);
return;
} else {
RETVAL_NULL();
}
}
/* }}} */
/* {{{ php_xmlreader_no_arg */
static void php_xmlreader_no_arg(INTERNAL_FUNCTION_PARAMETERS, xmlreader_read_int_t internal_function) {
zval *id;
int retval;
xmlreader_object *intern;
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retval = internal_function(intern->ptr);
if (retval == 1) {
RETURN_TRUE;
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ php_xmlreader_no_arg_string */
static void php_xmlreader_no_arg_string(INTERNAL_FUNCTION_PARAMETERS, xmlreader_read_char_t internal_function) {
zval *id;
char *retchar = NULL;
xmlreader_object *intern;
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retchar = (char *)internal_function(intern->ptr);
}
if (retchar) {
RETVAL_STRING(retchar);
xmlFree(retchar);
return;
} else {
RETVAL_EMPTY_STRING();
}
}
/* }}} */
/* {{{ php_xmlreader_set_relaxng_schema */
static void php_xmlreader_set_relaxng_schema(INTERNAL_FUNCTION_PARAMETERS, int type) {
#ifdef LIBXML_SCHEMAS_ENABLED
zval *id;
size_t source_len = 0;
int retval = -1;
xmlreader_object *intern;
xmlRelaxNGPtr schema = NULL;
char *source;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "p!", &source, &source_len) == FAILURE) {
RETURN_THROWS();
}
if (source != NULL && !source_len) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
if (source) {
schema = _xmlreader_get_relaxNG(source, source_len, type, NULL, NULL);
if (schema) {
retval = xmlTextReaderRelaxNGSetSchema(intern->ptr, schema);
}
} else {
/* unset the associated relaxNG context and schema if one exists */
retval = xmlTextReaderRelaxNGSetSchema(intern->ptr, NULL);
}
if (retval == 0) {
if (intern->schema) {
xmlRelaxNGFree((xmlRelaxNGPtr) intern->schema);
}
intern->schema = schema;
RETURN_TRUE;
} else {
php_error_docref(NULL, E_WARNING, "Schema contains errors");
RETURN_FALSE;
}
} else {
zend_throw_error(NULL, "Schema must be set prior to reading");
RETURN_THROWS();
}
#else
php_error_docref(NULL, E_WARNING, "No schema support built into libxml");
RETURN_FALSE;
#endif
}
/* }}} */
/* {{{ Closes xmlreader - current frees resources until xmlTextReaderClose is fixed in libxml */
PHP_METHOD(XMLReader, close)
{
zval *id;
xmlreader_object *intern;
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
/* libxml is segfaulting in versions up to 2.6.8 using xmlTextReaderClose so for
now we will free the whole reader when close is called as it would get rebuilt on
a new load anyways */
xmlreader_free_resources(intern);
RETURN_TRUE;
}
/* }}} */
/* {{{ Get value of an attribute from current element */
PHP_METHOD(XMLReader, getAttribute)
{
php_xmlreader_string_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderGetAttribute);
}
/* }}} */
/* {{{ Get value of an attribute at index from current element */
PHP_METHOD(XMLReader, getAttributeNo)
{
zval *id;
zend_long attr_pos;
char *retchar = NULL;
xmlreader_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &attr_pos) == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retchar = (char *)xmlTextReaderGetAttributeNo(intern->ptr, attr_pos);
}
if (retchar) {
RETVAL_STRING(retchar);
xmlFree(retchar);
}
}
/* }}} */
/* {{{ Get value of a attribute via name and namespace from current element */
PHP_METHOD(XMLReader, getAttributeNs)
{
zval *id;
size_t name_len = 0, ns_uri_len = 0;
xmlreader_object *intern;
char *name, *ns_uri, *retchar = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss", &name, &name_len, &ns_uri, &ns_uri_len) == FAILURE) {
RETURN_THROWS();
}
if (name_len == 0) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
if (ns_uri_len == 0) {
zend_argument_cannot_be_empty_error(2);
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retchar = (char *)xmlTextReaderGetAttributeNs(intern->ptr, (xmlChar *)name, (xmlChar *)ns_uri);
}
if (retchar) {
RETVAL_STRING(retchar);
xmlFree(retchar);
}
}
/* }}} */
/* {{{ Indicates whether given property (one of the parser option constants) is set or not on parser */
PHP_METHOD(XMLReader, getParserProperty)
{
zval *id;
zend_long property;
xmlreader_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &property) == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (!intern || !intern->ptr) {
zend_throw_error(NULL, "Cannot access parser properties before loading data");
RETURN_THROWS();
}
int retval = xmlTextReaderGetParserProp(intern->ptr,property);
if (retval == -1) {
zend_argument_value_error(1, "must be a valid parser property");
RETURN_THROWS();
}
RETURN_BOOL(retval);
}
/* }}} */
/* {{{ Returns boolean indicating if parsed document is valid or not.
Must set XMLREADER_LOADDTD or XMLREADER_VALIDATE parser option prior to the first call to read
or this method will always return FALSE */
PHP_METHOD(XMLReader, isValid)
{
php_xmlreader_no_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderIsValid);
}
/* }}} */
/* {{{ Return namespaceURI for associated prefix on current node */
PHP_METHOD(XMLReader, lookupNamespace)
{
php_xmlreader_string_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderLookupNamespace);
}
/* }}} */
/* {{{ Positions reader at specified attribute - Returns TRUE on success and FALSE on failure */
PHP_METHOD(XMLReader, moveToAttribute)
{
zval *id;
size_t name_len = 0;
int retval;
xmlreader_object *intern;
char *name;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &name, &name_len) == FAILURE) {
RETURN_THROWS();
}
if (name_len == 0) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retval = xmlTextReaderMoveToAttribute(intern->ptr, (xmlChar *)name);
if (retval == 1) {
RETURN_TRUE;
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ Positions reader at attribute at specified index.
Returns TRUE on success and FALSE on failure */
PHP_METHOD(XMLReader, moveToAttributeNo)
{
zval *id;
zend_long attr_pos;
int retval;
xmlreader_object *intern;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &attr_pos) == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retval = xmlTextReaderMoveToAttributeNo(intern->ptr, attr_pos);
if (retval == 1) {
RETURN_TRUE;
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ Positions reader at attribute spcified by name and namespaceURI.
Returns TRUE on success and FALSE on failure */
PHP_METHOD(XMLReader, moveToAttributeNs)
{
zval *id;
size_t name_len=0, ns_uri_len=0;
int retval;
xmlreader_object *intern;
char *name, *ns_uri;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss", &name, &name_len, &ns_uri, &ns_uri_len) == FAILURE) {
RETURN_THROWS();
}
if (name_len == 0) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
if (ns_uri_len == 0) {
zend_argument_cannot_be_empty_error(2);
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retval = xmlTextReaderMoveToAttributeNs(intern->ptr, (xmlChar *)name, (xmlChar *)ns_uri);
if (retval == 1) {
RETURN_TRUE;
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ Moves the position of the current instance to the node that contains the current Attribute node. */
PHP_METHOD(XMLReader, moveToElement)
{
php_xmlreader_no_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderMoveToElement);
}
/* }}} */
/* {{{ Moves the position of the current instance to the first attribute associated with the current node. */
PHP_METHOD(XMLReader, moveToFirstAttribute)
{
php_xmlreader_no_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderMoveToFirstAttribute);
}
/* }}} */
/* {{{ Moves the position of the current instance to the next attribute associated with the current node. */
PHP_METHOD(XMLReader, moveToNextAttribute)
{
php_xmlreader_no_arg(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderMoveToNextAttribute);
}
/* }}} */
/* {{{ Moves the position of the current instance to the next node in the stream. */
PHP_METHOD(XMLReader, read)
{
zval *id;
int retval;
xmlreader_object *intern;
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (!intern->ptr) {
zend_throw_error(NULL, "Data must be loaded before reading");
RETURN_THROWS();
}
retval = xmlTextReaderRead(intern->ptr);
if (retval == -1) {
RETURN_FALSE;
} else {
RETURN_BOOL(retval);
}
}
/* }}} */
/* {{{ Moves the position of the current instance to the next node in the stream. */
PHP_METHOD(XMLReader, next)
{
zval *id;
int retval;
size_t name_len=0;
xmlreader_object *intern;
char *name = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s!", &name, &name_len) == FAILURE) {
RETURN_THROWS();
}
id = ZEND_THIS;
intern = Z_XMLREADER_P(id);
if (intern->ptr) {
retval = xmlTextReaderNext(intern->ptr);
while (name != NULL && retval == 1) {
if (xmlStrEqual(xmlTextReaderConstLocalName(intern->ptr), (xmlChar *)name)) {
RETURN_TRUE;
}
retval = xmlTextReaderNext(intern->ptr);
}
if (retval == -1) {
RETURN_FALSE;
} else {
RETURN_BOOL(retval);
}
}
zend_throw_error(NULL, "Data must be loaded before reading");
}
/* }}} */
static bool xmlreader_valid_encoding(const char *encoding)
{
if (!encoding) {
return true;
}
/* Normally we could use xmlTextReaderConstEncoding() afterwards but libxml2 < 2.12.0 has a bug of course
* where it returns NULL for some valid encodings instead. */
xmlCharEncodingHandlerPtr handler = xmlFindCharEncodingHandler(encoding);
if (!handler) {
return false;
}
xmlCharEncCloseFunc(handler);
return true;
}
/* {{{ Sets the URI that the XMLReader will parse. */
static void xml_reader_from_uri(INTERNAL_FUNCTION_PARAMETERS, zend_class_entry *instance_ce, bool use_exceptions)
{
zval *id;
size_t source_len = 0, encoding_len = 0;
zend_long options = 0;
xmlreader_object *intern = NULL;
char *source, *valid_file = NULL;
char *encoding = NULL;
char resolved_path[MAXPATHLEN + 1];
xmlTextReaderPtr reader = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "p|p!l", &source, &source_len, &encoding, &encoding_len, &options) == FAILURE) {
RETURN_THROWS();
}
id = getThis();
if (id != NULL) {
ZEND_ASSERT(instanceof_function(Z_OBJCE_P(id), xmlreader_class_entry));
intern = Z_XMLREADER_P(id);
xmlreader_free_resources(intern);
}
if (!source_len) {
zend_argument_cannot_be_empty_error(1);
RETURN_THROWS();
}
if (!xmlreader_valid_encoding(encoding)) {
zend_argument_value_error(2, "must be a valid character encoding");
RETURN_THROWS();
}
valid_file = _xmlreader_get_valid_file_path(source, resolved_path, MAXPATHLEN );
if (valid_file) {
PHP_LIBXML_SANITIZE_GLOBALS(reader_for_file);
reader = xmlReaderForFile(valid_file, encoding, options);
PHP_LIBXML_RESTORE_GLOBALS(reader_for_file);
}
if (reader == NULL) {
if (use_exceptions) {
zend_throw_error(NULL, "Unable to open source data");
RETURN_THROWS();
} else {
php_error_docref(NULL, E_WARNING, "Unable to open source data");
RETURN_FALSE;
}
}
if (id == NULL) {
if (UNEXPECTED(object_init_with_constructor(return_value, instance_ce, 0, NULL, NULL) != SUCCESS)) {
xmlFreeTextReader(reader);
RETURN_THROWS();
}
intern = Z_XMLREADER_P(return_value);
intern->ptr = reader;
return;
}
intern->ptr = reader;
RETURN_TRUE;
}
PHP_METHOD(XMLReader, open)
{
xml_reader_from_uri(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlreader_class_entry, false);
}
PHP_METHOD(XMLReader, fromUri)
{
xml_reader_from_uri(INTERNAL_FUNCTION_PARAM_PASSTHRU, Z_CE_P(ZEND_THIS), true);
}
/* }}} */
static int xml_reader_stream_read(void *context, char *buffer, int len)
{
zend_resource *resource = context;
if (EXPECTED(resource->ptr)) {
php_stream *stream = resource->ptr;
return php_stream_read(stream, buffer, len);
}
return -1;
}
static int xml_reader_stream_close(void *context)
{
zend_resource *resource = context;
/* Don't close it as others may still use it! We don't own the resource!
* Just delete our reference (and clean up if we're the last one). */
zend_list_delete(resource);
return 0;
}
PHP_METHOD(XMLReader, fromStream)
{
zval *stream_zv;
php_stream *stream;
char *document_uri = NULL;
char *encoding_name = NULL;
size_t document_uri_len, encoding_name_len;
zend_long flags = 0;
ZEND_PARSE_PARAMETERS_START(1, 4)
Z_PARAM_RESOURCE(stream_zv);
Z_PARAM_OPTIONAL
Z_PARAM_PATH_OR_NULL(encoding_name, encoding_name_len)
Z_PARAM_LONG(flags)
Z_PARAM_PATH_OR_NULL(document_uri, document_uri_len)
ZEND_PARSE_PARAMETERS_END();
php_stream_from_res(stream, Z_RES_P(stream_zv));
if (!xmlreader_valid_encoding(encoding_name)) {
zend_argument_value_error(2, "must be a valid character encoding");
RETURN_THROWS();
}
PHP_LIBXML_SANITIZE_GLOBALS(reader_for_stream);
xmlTextReaderPtr reader = xmlReaderForIO(
xml_reader_stream_read,
xml_reader_stream_close,
stream->res,
document_uri,
encoding_name,
flags
);
PHP_LIBXML_RESTORE_GLOBALS(reader_for_stream);
if (UNEXPECTED(reader == NULL)) {
zend_throw_error(NULL, "Could not construct libxml reader");
RETURN_THROWS();
}
/* When the reader is closed (even in error paths) the reference is destroyed. */
Z_ADDREF_P(stream_zv);
if (object_init_with_constructor(return_value, Z_CE_P(ZEND_THIS), 0, NULL, NULL) == SUCCESS) {
xmlreader_object *intern = Z_XMLREADER_P(return_value);
intern->ptr = reader;
} else {
xmlFreeTextReader(reader);
}
}
/* Not Yet Implemented in libxml - functions exist just not coded
PHP_METHOD(XMLReader, resetState)
{
}
*/
/* {{{ Reads the contents of the current node, including child nodes and markup. */
PHP_METHOD(XMLReader, readInnerXml)
{
php_xmlreader_no_arg_string(INTERNAL_FUNCTION_PARAM_PASSTHRU, xmlTextReaderReadInnerXml);
}
/* }}} */