216 lines
8.2 KiB
C
216 lines
8.2 KiB
C
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/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Shane Caraveo <shane@php.net> |
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| Wez Furlong <wez@thebrainroom.com> |
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+----------------------------------------------------------------------+
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*/
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#ifndef PHP_LIBXML_H
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#define PHP_LIBXML_H
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#ifdef HAVE_LIBXML
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extern zend_module_entry libxml_module_entry;
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#define libxml_module_ptr &libxml_module_entry
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#include "php_version.h"
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#define PHP_LIBXML_VERSION PHP_VERSION
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#ifdef PHP_WIN32
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# define PHP_LIBXML_API __declspec(dllexport)
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#elif defined(__GNUC__) && __GNUC__ >= 4
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# define PHP_LIBXML_API __attribute__ ((visibility("default")))
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#else
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# define PHP_LIBXML_API
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#endif
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#include "zend_smart_str.h"
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#include <libxml/tree.h>
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#include <libxml/parser.h>
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#define LIBXML_SAVE_NOEMPTYTAG 1<<2
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ZEND_BEGIN_MODULE_GLOBALS(libxml)
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zval stream_context;
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smart_str error_buffer;
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zend_llist *error_list;
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zend_fcall_info_cache entity_loader_callback;
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bool entity_loader_disabled;
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ZEND_END_MODULE_GLOBALS(libxml)
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typedef struct _libxml_doc_props {
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HashTable *classmap;
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bool formatoutput;
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bool validateonparse;
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bool resolveexternals;
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bool preservewhitespace;
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bool substituteentities;
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bool stricterror;
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bool recover;
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} libxml_doc_props;
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typedef struct {
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size_t modification_nr;
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} php_libxml_cache_tag;
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typedef struct _php_libxml_ref_obj {
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void *ptr;
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int refcount;
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libxml_doc_props *doc_props;
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php_libxml_cache_tag cache_tag;
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} php_libxml_ref_obj;
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typedef struct _php_libxml_node_ptr {
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xmlNodePtr node;
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int refcount;
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void *_private;
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} php_libxml_node_ptr;
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typedef struct _php_libxml_node_object {
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php_libxml_node_ptr *node;
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php_libxml_ref_obj *document;
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HashTable *properties;
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zend_object std;
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} php_libxml_node_object;
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static inline php_libxml_node_object *php_libxml_node_fetch_object(zend_object *obj) {
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return (php_libxml_node_object *)((char*)(obj) - obj->handlers->offset);
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}
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static zend_always_inline void php_libxml_invalidate_node_list_cache(php_libxml_ref_obj *doc_ptr)
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{
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if (!doc_ptr) {
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return;
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}
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#if SIZEOF_SIZE_T == 8
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/* If one operation happens every nanosecond, then it would still require 584 years to overflow
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* the counter. So we'll just assume this never happens. */
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doc_ptr->cache_tag.modification_nr++;
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#else
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size_t new_modification_nr = doc_ptr->cache_tag.modification_nr + 1;
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if (EXPECTED(new_modification_nr > 0)) { /* unsigned overflow; checking after addition results in one less instruction */
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doc_ptr->cache_tag.modification_nr = new_modification_nr;
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}
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#endif
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}
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static zend_always_inline void php_libxml_invalidate_node_list_cache_from_doc(xmlDocPtr docp)
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{
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if (docp && docp->_private) { /* docp is NULL for detached nodes */
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php_libxml_node_ptr *node_private = (php_libxml_node_ptr *) docp->_private;
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php_libxml_node_object *object_private = (php_libxml_node_object *) node_private->_private;
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if (object_private) {
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php_libxml_invalidate_node_list_cache(object_private->document);
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}
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}
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}
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#define Z_LIBXML_NODE_P(zv) php_libxml_node_fetch_object(Z_OBJ_P((zv)))
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typedef void * (*php_libxml_export_node) (zval *object);
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PHP_LIBXML_API int php_libxml_increment_node_ptr(php_libxml_node_object *object, xmlNodePtr node, void *private_data);
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PHP_LIBXML_API int php_libxml_decrement_node_ptr(php_libxml_node_object *object);
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PHP_LIBXML_API int php_libxml_increment_doc_ref(php_libxml_node_object *object, xmlDocPtr docp);
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PHP_LIBXML_API int php_libxml_decrement_doc_ref(php_libxml_node_object *object);
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PHP_LIBXML_API xmlNodePtr php_libxml_import_node(zval *object);
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PHP_LIBXML_API zval *php_libxml_register_export(zend_class_entry *ce, php_libxml_export_node export_function);
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/* When an explicit freeing of node and children is required */
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PHP_LIBXML_API void php_libxml_node_free_list(xmlNodePtr node);
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PHP_LIBXML_API void php_libxml_node_free_resource(xmlNodePtr node);
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/* When object dtor is called as node may still be referenced */
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PHP_LIBXML_API void php_libxml_node_decrement_resource(php_libxml_node_object *object);
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PHP_LIBXML_API void php_libxml_error_handler(void *ctx, const char *msg, ...);
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PHP_LIBXML_API void php_libxml_ctx_warning(void *ctx, const char *msg, ...);
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PHP_LIBXML_API void php_libxml_ctx_error(void *ctx, const char *msg, ...);
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PHP_LIBXML_API int php_libxml_xmlCheckUTF8(const unsigned char *s);
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PHP_LIBXML_API void php_libxml_switch_context(zval *context, zval *oldcontext);
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PHP_LIBXML_API void php_libxml_issue_error(int level, const char *msg);
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PHP_LIBXML_API bool php_libxml_disable_entity_loader(bool disable);
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PHP_LIBXML_API void php_libxml_set_old_ns(xmlDocPtr doc, xmlNsPtr ns);
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/* Init/shutdown functions*/
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PHP_LIBXML_API void php_libxml_initialize(void);
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PHP_LIBXML_API void php_libxml_shutdown(void);
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#define LIBXML(v) ZEND_MODULE_GLOBALS_ACCESSOR(libxml, v)
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#if defined(ZTS) && defined(COMPILE_DL_LIBXML)
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ZEND_TSRMLS_CACHE_EXTERN()
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#endif
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#if defined(__clang__)
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_START \
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_Pragma("clang diagnostic push") \
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_Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_END \
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_Pragma("clang diagnostic pop")
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#elif defined(__GNUC__)
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_START \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_END \
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_Pragma("GCC diagnostic pop")
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#else
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_START
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# define PHP_LIBXML_IGNORE_DEPRECATIONS_END
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#endif
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/* Other extension may override the global state options, these global options
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* are copied initially to ctxt->options. Set the options to a known good value.
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* See libxml2 globals.c and parserInternals.c.
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* The unique_name argument allows multiple sanitizes and restores within the
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* same function, even nested is necessary. */
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#define PHP_LIBXML_SANITIZE_GLOBALS(unique_name) \
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PHP_LIBXML_IGNORE_DEPRECATIONS_START \
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int xml_old_loadsubset_##unique_name = xmlLoadExtDtdDefaultValue; \
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xmlLoadExtDtdDefaultValue = 0; \
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int xml_old_validate_##unique_name = xmlDoValidityCheckingDefaultValue; \
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xmlDoValidityCheckingDefaultValue = 0; \
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int xml_old_pedantic_##unique_name = xmlPedanticParserDefault(0); \
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int xml_old_substitute_##unique_name = xmlSubstituteEntitiesDefault(0); \
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int xml_old_linenrs_##unique_name = xmlLineNumbersDefault(0); \
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int xml_old_blanks_##unique_name = xmlKeepBlanksDefault(1); \
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PHP_LIBXML_IGNORE_DEPRECATIONS_END
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#define PHP_LIBXML_RESTORE_GLOBALS(unique_name) \
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PHP_LIBXML_IGNORE_DEPRECATIONS_START \
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xmlLoadExtDtdDefaultValue = xml_old_loadsubset_##unique_name; \
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xmlDoValidityCheckingDefaultValue = xml_old_validate_##unique_name; \
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(void) xmlPedanticParserDefault(xml_old_pedantic_##unique_name); \
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(void) xmlSubstituteEntitiesDefault(xml_old_substitute_##unique_name); \
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(void) xmlLineNumbersDefault(xml_old_linenrs_##unique_name); \
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(void) xmlKeepBlanksDefault(xml_old_blanks_##unique_name); \
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PHP_LIBXML_IGNORE_DEPRECATIONS_END
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/* Alternative for above, working directly on the context and not setting globals.
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* Generally faster because no locking is involved, and this has the advantage that it sets the options to a known good value. */
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static zend_always_inline void php_libxml_sanitize_parse_ctxt_options(xmlParserCtxtPtr ctxt)
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{
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ctxt->loadsubset = 0;
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ctxt->validate = 0;
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ctxt->pedantic = 0;
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ctxt->replaceEntities = 0;
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ctxt->linenumbers = 0;
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ctxt->keepBlanks = 1;
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ctxt->options = 0;
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}
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#else /* HAVE_LIBXML */
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#define libxml_module_ptr NULL
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#endif
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#define phpext_libxml_ptr libxml_module_ptr
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#endif /* PHP_LIBXML_H */
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