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文件: /opt/alt/php85/usr/include/php/ext/libxml/php_libxml.h
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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. | +----------------------------------------------------------------------+ | Authors: Shane Caraveo <shane@php.net> | | Wez Furlong <wez@thebrainroom.com> | +----------------------------------------------------------------------+ */ #ifndef PHP_LIBXML_H #define PHP_LIBXML_H #ifdef HAVE_LIBXML extern zend_module_entry libxml_module_entry; #define libxml_module_ptr &libxml_module_entry #include "php_version.h" #define PHP_LIBXML_VERSION PHP_VERSION #ifdef PHP_WIN32 # define PHP_LIBXML_API __declspec(dllexport) #elif defined(__GNUC__) && __GNUC__ >= 4 # define PHP_LIBXML_API __attribute__ ((visibility("default"))) #else # define PHP_LIBXML_API #endif #include "zend_smart_str.h" #include <libxml/tree.h> #include <libxml/parser.h> #define LIBXML_SAVE_NOEMPTYTAG 1<<2 #define LIBXML_NS_TAG_HOOK 1 ZEND_BEGIN_MODULE_GLOBALS(libxml) zval stream_context; smart_str error_buffer; zend_llist *error_list; zend_fcall_info_cache entity_loader_callback; bool entity_loader_disabled; ZEND_END_MODULE_GLOBALS(libxml) typedef struct _libxml_doc_props { HashTable *classmap; bool formatoutput; bool validateonparse; bool resolveexternals; bool preservewhitespace; bool substituteentities; bool stricterror; bool recover; } libxml_doc_props; /* Modification tracking: when the object changes, we increment its counter. * When this counter no longer matches the counter at the time of caching, * we know that the object has changed and we have to update the cache. */ typedef struct { size_t modification_nr; } php_libxml_cache_tag; typedef struct php_libxml_private_data_header { void (*dtor)(struct php_libxml_private_data_header *); void (*ns_hook)(struct php_libxml_private_data_header *, xmlNodePtr); /* extra fields */ } php_libxml_private_data_header; /** * It's possible to set custom handlers for certain actions depending on the type of document. * For example, there exist multiple ways to serialize an XML document, * therefore this structure allows setting up a custom handler. */ typedef struct php_libxml_document_handlers { zend_string *(*dump_node_to_str)(xmlDocPtr doc, xmlNodePtr node, bool format, const char *encoding); zend_string *(*dump_doc_to_str)(xmlDocPtr doc, int options, const char *encoding); zend_long (*dump_node_to_file)(const char *filename, xmlDocPtr doc, xmlNodePtr node, bool format, const char *encoding); zend_long (*dump_doc_to_file)(const char *filename, xmlDocPtr doc, bool format, const char *encoding); } php_libxml_document_handlers; /** * Multiple representations are possible of the same underlying node data. * This is the case for example when a SimpleXML node is imported into DOM. * It must not be possible to obtain both a legacy and a modern representation * of the same node, as they have different assumptions. The class_type field * allows us to pin the representation to one of the two. If it is unset, no * representation has been forced upon the node yet, and thus no assumptions * have yet been made. This is the case for example when a SimpleXML node is * created by SimpleXML itself and never leaves SimpleXML. */ typedef enum _php_libxml_class_type { PHP_LIBXML_CLASS_UNSET = 0, PHP_LIBXML_CLASS_LEGACY = 1, PHP_LIBXML_CLASS_MODERN = 2, } php_libxml_class_type; typedef enum php_libxml_quirks_mode { PHP_LIBXML_NO_QUIRKS = 0, PHP_LIBXML_QUIRKS, PHP_LIBXML_LIMITED_QUIRKS, } php_libxml_quirks_mode; typedef struct _php_libxml_ref_obj { void *ptr; libxml_doc_props *doc_props; php_libxml_cache_tag cache_tag; php_libxml_private_data_header *private_data; const php_libxml_document_handlers *handlers; unsigned int refcount; php_libxml_class_type class_type : 8; php_libxml_quirks_mode quirks_mode : 8; } php_libxml_ref_obj; typedef struct _php_libxml_node_ptr { xmlNodePtr node; unsigned int refcount; void *_private; } php_libxml_node_ptr; typedef struct _php_libxml_node_object { php_libxml_node_ptr *node; php_libxml_ref_obj *document; zend_object std; } php_libxml_node_object; static inline php_libxml_node_object *php_libxml_node_fetch_object(zend_object *obj) { return (php_libxml_node_object *)((char*)(obj) - obj->handlers->offset); } static zend_always_inline void php_libxml_invalidate_cache_tag(php_libxml_cache_tag *cache_tag) { #if SIZEOF_SIZE_T == 8 /* If one operation happens every nanosecond, then it would still require 584 years to overflow * the counter. So we'll just assume this never happens. */ cache_tag->modification_nr++; #else size_t new_modification_nr = cache_tag->modification_nr + 1; if (EXPECTED(new_modification_nr > 0)) { /* unsigned overflow; checking after addition results in one less instruction */ cache_tag->modification_nr = new_modification_nr; } #endif } static zend_always_inline bool php_libxml_is_cache_tag_stale(const php_libxml_cache_tag *object_tag, const php_libxml_cache_tag *cache_tag) { ZEND_ASSERT(object_tag != NULL); ZEND_ASSERT(cache_tag != NULL); /* See overflow comment in php_libxml_invalidate_node_list_cache(). */ #if SIZEOF_SIZE_T == 8 return cache_tag->modification_nr != object_tag->modification_nr; #else return cache_tag->modification_nr != object_tag->modification_nr || UNEXPECTED(object_tag->modification_nr == SIZE_MAX); #endif } static zend_always_inline void php_libxml_invalidate_node_list_cache(php_libxml_ref_obj *doc_ptr) { if (doc_ptr) { php_libxml_invalidate_cache_tag(&doc_ptr->cache_tag); } } static zend_always_inline void php_libxml_invalidate_node_list_cache_from_doc(xmlDocPtr docp) { if (docp && docp->_private) { /* docp is NULL for detached nodes */ php_libxml_node_ptr *node_private = (php_libxml_node_ptr *) docp->_private; php_libxml_node_object *object_private = (php_libxml_node_object *) node_private->_private; if (object_private) { php_libxml_invalidate_node_list_cache(object_private->document); } } } #define Z_LIBXML_NODE_P(zv) php_libxml_node_fetch_object(Z_OBJ_P((zv))) typedef void * (*php_libxml_export_node) (zval *object); typedef enum { PHP_LIBXML_ERROR = 0, PHP_LIBXML_CTX_ERROR = 1, PHP_LIBXML_CTX_WARNING = 2, } php_libxml_error_level; PHP_LIBXML_API unsigned int php_libxml_increment_node_ptr(php_libxml_node_object *object, xmlNodePtr node, void *private_data); PHP_LIBXML_API unsigned int php_libxml_decrement_node_ptr(php_libxml_node_object *object); PHP_LIBXML_API unsigned int php_libxml_decrement_node_ptr_ref(php_libxml_node_ptr *ptr); PHP_LIBXML_API unsigned int php_libxml_increment_doc_ref(php_libxml_node_object *object, xmlDocPtr docp); PHP_LIBXML_API unsigned int php_libxml_decrement_doc_ref_directly(php_libxml_ref_obj *document); PHP_LIBXML_API unsigned int php_libxml_decrement_doc_ref(php_libxml_node_object *object); PHP_LIBXML_API xmlNodePtr php_libxml_import_node(zval *object); PHP_LIBXML_API zval *php_libxml_register_export(const zend_class_entry *ce, php_libxml_export_node export_function); /* When an explicit freeing of node and children is required */ PHP_LIBXML_API void php_libxml_node_free_list(xmlNodePtr node); PHP_LIBXML_API void php_libxml_node_free_resource(xmlNodePtr node); /* When object dtor is called as node may still be referenced */ PHP_LIBXML_API void php_libxml_node_decrement_resource(php_libxml_node_object *object); PHP_LIBXML_API void php_libxml_error_handler(void *ctx, const char *msg, ...); PHP_LIBXML_API void php_libxml_ctx_warning(void *ctx, const char *msg, ...); PHP_LIBXML_API void php_libxml_pretend_ctx_error_ex(const char *file, int line, int column, const char *msg,...); PHP_LIBXML_API void php_libxml_ctx_error(void *ctx, const char *msg, ...); PHP_LIBXML_API void php_libxml_error_handler_va(php_libxml_error_level error_type, void *ctx, const char *msg, va_list args); PHP_LIBXML_API void php_libxml_switch_context(const zval *context, zval *oldcontext); PHP_LIBXML_API void php_libxml_issue_error(int level, const char *msg); PHP_LIBXML_API bool php_libxml_disable_entity_loader(bool disable); PHP_LIBXML_API void php_libxml_set_old_ns(xmlDocPtr doc, xmlNsPtr ns); PHP_LIBXML_API php_stream_context *php_libxml_get_stream_context(void); PHP_LIBXML_API bool php_libxml_uses_internal_errors(void); PHP_LIBXML_API xmlChar *php_libxml_attr_value(const xmlAttr *attr, bool *free); PHP_LIBXML_API zend_string *php_libxml_sniff_charset_from_string(const char *start, const char *end); PHP_LIBXML_API zend_string *php_libxml_sniff_charset_from_stream(const php_stream *s); /* Init/shutdown functions*/ PHP_LIBXML_API void php_libxml_initialize(void); PHP_LIBXML_API void php_libxml_shutdown(void); #define LIBXML(v) ZEND_MODULE_GLOBALS_ACCESSOR(libxml, v) #if defined(ZTS) && defined(COMPILE_DL_LIBXML) ZEND_TSRMLS_CACHE_EXTERN() #endif /* Other extension may override the global state options, these global options * are copied initially to ctxt->options. Set the options to a known good value. * See libxml2 globals.c and parserInternals.c. * The unique_name argument allows multiple sanitizes and restores within the * same function, even nested is necessary. */ # define PHP_LIBXML_SANITIZE_GLOBALS(unique_name) \ ZEND_DIAGNOSTIC_IGNORED_START("-Wdeprecated-declarations") \ int xml_old_loadsubset_##unique_name = xmlLoadExtDtdDefaultValue; \ xmlLoadExtDtdDefaultValue = 0; \ int xml_old_validate_##unique_name = xmlDoValidityCheckingDefaultValue; \ xmlDoValidityCheckingDefaultValue = 0; \ int xml_old_pedantic_##unique_name = xmlPedanticParserDefault(0); \ int xml_old_substitute_##unique_name = xmlSubstituteEntitiesDefault(0); \ int xml_old_linenrs_##unique_name = xmlLineNumbersDefault(0); \ int xml_old_blanks_##unique_name = xmlKeepBlanksDefault(1); \ ZEND_DIAGNOSTIC_IGNORED_END # define PHP_LIBXML_RESTORE_GLOBALS(unique_name) \ ZEND_DIAGNOSTIC_IGNORED_START("-Wdeprecated-declarations") \ xmlLoadExtDtdDefaultValue = xml_old_loadsubset_##unique_name; \ xmlDoValidityCheckingDefaultValue = xml_old_validate_##unique_name; \ (void) xmlPedanticParserDefault(xml_old_pedantic_##unique_name); \ (void) xmlSubstituteEntitiesDefault(xml_old_substitute_##unique_name); \ (void) xmlLineNumbersDefault(xml_old_linenrs_##unique_name); \ (void) xmlKeepBlanksDefault(xml_old_blanks_##unique_name); \ ZEND_DIAGNOSTIC_IGNORED_END /* Alternative for above, working directly on the context and not setting globals. * Generally faster because no locking is involved, and this has the advantage that it sets the options to a known good value. */ static zend_always_inline void php_libxml_sanitize_parse_ctxt_options(xmlParserCtxtPtr ctxt) { ZEND_DIAGNOSTIC_IGNORED_START("-Wdeprecated-declarations") \ ctxt->loadsubset = 0; ctxt->validate = 0; ctxt->pedantic = 0; ctxt->replaceEntities = 0; ctxt->linenumbers = 0; ctxt->keepBlanks = 1; ctxt->options = 0; ZEND_DIAGNOSTIC_IGNORED_END } #endif #define phpext_libxml_ptr libxml_module_ptr #endif /* PHP_LIBXML_H */
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