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Editing: zend.h

/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) Zend Technologies Ltd. (http://www.zend.com)           |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt.                                |
   | If you did not receive a copy of the Zend license and are unable to  |
   | obtain it through the world-wide-web, please send a note to          |
   | license@zend.com so we can mail you a copy immediately.              |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   +----------------------------------------------------------------------+
*/

#ifndef ZEND_H
#define ZEND_H

#define ZEND_VERSION "4.5.4"

#define ZEND_ENGINE_3

#include "zend_types.h"
#include "zend_map_ptr.h"
#include "zend_errors.h"
#include "zend_alloc.h"
#include "zend_llist.h"
#include "zend_string.h"
#include "zend_hash.h"
#include "zend_ast.h"
#include "zend_gc.h"
#include "zend_variables.h"
#include "zend_iterators.h"
#include "zend_stream.h"
#include "zend_smart_str_public.h"
#include "zend_smart_string_public.h"
#include "zend_signal.h"
#include "zend_max_execution_timer.h"

#define zend_sprintf sprintf

#define HANDLE_BLOCK_INTERRUPTIONS()		ZEND_SIGNAL_BLOCK_INTERRUPTIONS()
#define HANDLE_UNBLOCK_INTERRUPTIONS()		ZEND_SIGNAL_UNBLOCK_INTERRUPTIONS()

#define INTERNAL_FUNCTION_PARAMETERS zend_execute_data *execute_data, zval *return_value
#define INTERNAL_FUNCTION_PARAM_PASSTHRU execute_data, return_value

#define USED_RET() \
	(!EX(prev_execute_data) || \
	 !ZEND_USER_CODE(EX(prev_execute_data)->func->common.type) || \
	 (EX(prev_execute_data)->opline->result_type != IS_UNUSED))

#ifdef ZEND_ENABLE_STATIC_TSRMLS_CACHE
#define ZEND_TSRMG TSRMG_STATIC
#define ZEND_TSRMG_FAST TSRMG_FAST_STATIC
#define ZEND_TSRMLS_CACHE_EXTERN() TSRMLS_CACHE_EXTERN()
#define ZEND_TSRMLS_CACHE_DEFINE() TSRMLS_CACHE_DEFINE()
#define ZEND_TSRMLS_CACHE_UPDATE() TSRMLS_CACHE_UPDATE()
#define ZEND_TSRMLS_CACHE TSRMLS_CACHE
#else
#define ZEND_TSRMG TSRMG
#define ZEND_TSRMG_FAST TSRMG_FAST
#define ZEND_TSRMLS_CACHE_EXTERN()
#define ZEND_TSRMLS_CACHE_DEFINE()
#define ZEND_TSRMLS_CACHE_UPDATE()
#define ZEND_TSRMLS_CACHE
#endif

#ifndef ZEND_COMPILE_DL_EXT
TSRMLS_MAIN_CACHE_EXTERN()
#else
ZEND_TSRMLS_CACHE_EXTERN()
#endif

struct _zend_serialize_data;
struct _zend_unserialize_data;

typedef struct _zend_serialize_data zend_serialize_data;
typedef struct _zend_unserialize_data zend_unserialize_data;

typedef struct _zend_class_name {
	zend_string *name;
	zend_string *lc_name;
} zend_class_name;

typedef struct _zend_trait_method_reference {
	zend_string *method_name;
	zend_string *class_name;
} zend_trait_method_reference;

typedef struct _zend_trait_precedence {
	zend_trait_method_reference trait_method;
	uint32_t num_excludes;
	zend_string *exclude_class_names[1];
} zend_trait_precedence;

typedef struct _zend_trait_alias {
	zend_trait_method_reference trait_method;

/**
	* name for method to be added
	*/
	zend_string *alias;

/**
	* modifiers to be set on trait method
	*/
	uint32_t modifiers;
} zend_trait_alias;

typedef struct _zend_class_mutable_data {
	zval      *default_properties_table;
	HashTable *constants_table;
	uint32_t   ce_flags;
	HashTable *backed_enum_table;
} zend_class_mutable_data;

typedef struct _zend_class_dependency {
	zend_string      *name;
	zend_class_entry *ce;
} zend_class_dependency;

typedef struct _zend_inheritance_cache_entry zend_inheritance_cache_entry;

typedef struct _zend_error_info {
	int type;
	uint32_t lineno;
	zend_string *filename;
	zend_string *message;
} zend_error_info;

struct _zend_inheritance_cache_entry {
	zend_inheritance_cache_entry *next;
	zend_class_entry             *ce;
	zend_class_entry             *parent;
	zend_class_dependency        *dependencies;
	uint32_t                      dependencies_count;
	uint32_t                      num_warnings;
	zend_error_info             **warnings;
	zend_class_entry             *traits_and_interfaces[1];
};

struct _zend_class_entry {
	char type;
	zend_string *name;
	/* class_entry or string depending on ZEND_ACC_LINKED */
	union {
		zend_class_entry *parent;
		zend_string *parent_name;
	};
	int refcount;
	uint32_t ce_flags;

int default_properties_count;
	int default_static_members_count;
	zval *default_properties_table;
	zval *default_static_members_table;
	ZEND_MAP_PTR_DEF(zval *, static_members_table);
	HashTable function_table;
	HashTable properties_info;
	HashTable constants_table;

ZEND_MAP_PTR_DEF(zend_class_mutable_data*, mutable_data);
	zend_inheritance_cache_entry *inheritance_cache;

struct _zend_property_info **properties_info_table;

zend_function *constructor;
	zend_function *destructor;
	zend_function *clone;
	zend_function *__get;
	zend_function *__set;
	zend_function *__unset;
	zend_function *__isset;
	zend_function *__call;
	zend_function *__callstatic;
	zend_function *__tostring;
	zend_function *__debugInfo;
	zend_function *__serialize;
	zend_function *__unserialize;

const zend_object_handlers *default_object_handlers;

/* allocated only if class implements Iterator or IteratorAggregate interface */
	zend_class_iterator_funcs *iterator_funcs_ptr;
	/* allocated only if class implements ArrayAccess interface */
	zend_class_arrayaccess_funcs *arrayaccess_funcs_ptr;

/* handlers */
	union {
		zend_object* (*create_object)(zend_class_entry *class_type);
		int (*interface_gets_implemented)(zend_class_entry *iface, zend_class_entry *class_type); /* a class implements this interface */
	};
	zend_object_iterator *(*get_iterator)(zend_class_entry *ce, zval *object, int by_ref);
	zend_function *(*get_static_method)(zend_class_entry *ce, zend_string* method);

/* serializer callbacks */
	int (*serialize)(zval *object, unsigned char **buffer, size_t *buf_len, zend_serialize_data *data);
	int (*unserialize)(zval *object, zend_class_entry *ce, const unsigned char *buf, size_t buf_len, zend_unserialize_data *data);

uint32_t num_interfaces;
	uint32_t num_traits;
	uint32_t num_hooked_props;
	uint32_t num_hooked_prop_variance_checks;

/* class_entry or string(s) depending on ZEND_ACC_LINKED */
	union {
		zend_class_entry **interfaces;
		zend_class_name *interface_names;
	};

zend_class_name *trait_names;
	zend_trait_alias **trait_aliases;
	zend_trait_precedence **trait_precedences;
	HashTable *attributes;

uint32_t enum_backing_type;
	HashTable *backed_enum_table;

zend_string *doc_comment;

union {
		struct {
			zend_string *filename;
			uint32_t line_start;
			uint32_t line_end;
		} user;
		struct {
			const struct _zend_function_entry *builtin_functions;
			struct _zend_module_entry *module;
		} internal;
	} info;
};

typedef union {
	zend_max_align_t align;
	uint64_t opaque[5];
} zend_random_bytes_insecure_state;

typedef struct _zend_utility_functions {
	void (*error_function)(int type, zend_string *error_filename, const uint32_t error_lineno, zend_string *message);
	size_t (*printf_function)(const char *format, ...) ZEND_ATTRIBUTE_PTR_FORMAT(printf, 1, 2);
	size_t (*write_function)(const char *str, size_t str_length);
	FILE *(*fopen_function)(zend_string *filename, zend_string **opened_path);
	void (*message_handler)(zend_long message, const void *data);
	zval *(*get_configuration_directive)(zend_string *name);
	void (*ticks_function)(int ticks);
	void (*on_timeout)(int seconds);
	zend_result (*stream_open_function)(zend_file_handle *handle);
	void (*printf_to_smart_string_function)(smart_string *buf, const char *format, va_list ap);
	void (*printf_to_smart_str_function)(smart_str *buf, const char *format, va_list ap);
	char *(*getenv_function)(const char *name, size_t name_len);
	zend_string *(*resolve_path_function)(zend_string *filename);
	zend_result (*random_bytes_function)(void *bytes, size_t size, char *errstr, size_t errstr_size);
	void (*random_bytes_insecure_function)(zend_random_bytes_insecure_state *state, void *bytes, size_t size);
} zend_utility_functions;

typedef struct _zend_utility_values {
	bool html_errors;
} zend_utility_values;

typedef size_t (*zend_write_func_t)(const char *str, size_t str_length);

#define zend_bailout()		_zend_bailout(__FILE__, __LINE__)

#define zend_try												\
	{															\
		JMP_BUF *__orig_bailout = EG(bailout);					\
		JMP_BUF __bailout;										\
																\
		EG(bailout) = &__bailout;								\
		if (SETJMP(__bailout)==0) {
#define zend_catch												\
		} else {												\
			EG(bailout) = __orig_bailout;
#define zend_end_try()											\
		}														\
		EG(bailout) = __orig_bailout;							\
	}
#define zend_first_try		EG(bailout)=NULL;	zend_try

BEGIN_EXTERN_C()
void zend_startup(zend_utility_functions *utility_functions);
void zend_shutdown(void);
void zend_register_standard_ini_entries(void);
zend_result zend_post_startup(void);
void zend_set_utility_values(zend_utility_values *utility_values);
void zend_unload_modules(void);

ZEND_API ZEND_COLD ZEND_NORETURN void _zend_bailout(const char *filename, uint32_t lineno);
ZEND_API size_t zend_get_page_size(void);

ZEND_API size_t zend_vspprintf(char **pbuf, size_t max_len, const char *format, va_list ap);
ZEND_API size_t zend_spprintf(char **message, size_t max_len, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 3, 4);
ZEND_API zend_string *zend_vstrpprintf(size_t max_len, const char *format, va_list ap);
ZEND_API zend_string *zend_strpprintf(size_t max_len, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);

/* Same as zend_spprintf and zend_strpprintf, without checking of format validity.
 * For use with custom printf specifiers such as %H. */
ZEND_API size_t zend_spprintf_unchecked(char **message, size_t max_len, const char *format, ...);
ZEND_API zend_string *zend_strpprintf_unchecked(size_t max_len, const char *format, ...);

ZEND_API const char *get_zend_version(void);
ZEND_API bool zend_make_printable_zval(zval *expr, zval *expr_copy);
ZEND_API size_t zend_print_zval(zval *expr, int indent);
ZEND_API void zend_print_zval_r(zval *expr, int indent);
ZEND_API zend_string *zend_print_zval_r_to_str(zval *expr, int indent);
ZEND_API void zend_print_flat_zval_r(zval *expr);
void zend_print_flat_zval_r_to_buf(smart_str *str, zval *expr);

static zend_always_inline size_t zend_print_variable(zval *var) {
	return zend_print_zval(var, 0);
}

ZEND_API ZEND_COLD void zend_output_debug_string(bool trigger_break, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);

ZEND_API void zend_activate(void);
ZEND_API void zend_deactivate(void);
ZEND_API void zend_call_destructors(void);
ZEND_API void zend_activate_modules(void);
ZEND_API void zend_deactivate_modules(void);
ZEND_API void zend_post_deactivate_modules(void);

ZEND_API void free_estring(char **str_p);

END_EXTERN_C()

/* output support */
#define ZEND_WRITE(str, str_len)		zend_write((str), (str_len))
#define ZEND_WRITE_EX(str, str_len)		write_func((str), (str_len))
#define ZEND_PUTS(str)					zend_write((str), strlen((str)))
#define ZEND_PUTS_EX(str)				write_func((str), strlen((str)))
#define ZEND_PUTC(c)					zend_write(&(c), 1)

BEGIN_EXTERN_C()
extern ZEND_API size_t (*zend_printf)(const char *format, ...) ZEND_ATTRIBUTE_PTR_FORMAT(printf, 1, 2);
extern ZEND_API zend_write_func_t zend_write;
extern ZEND_API FILE *(*zend_fopen)(zend_string *filename, zend_string **opened_path);
extern ZEND_API void (*zend_ticks_function)(int ticks);

/* Called by the VM in certain places like at the loop header, user function
 * entry, and after internal function calls, if EG(vm_interrupt) has been set.
 *
 * If this is used to switch the EG(current_execute_data), such as implementing
 * a coroutine scheduler, then it needs to check the top frame to see if it's
 * an internal function. If an internal function is on top, then the frame
 * shouldn't be switched away.
 *
 * Prior to PHP 8.0, this check was not necessary. In PHP 8.0,
 * zend_call_function started calling zend_interrupt_function, and in 8.4 the
 * DO_*CALL* opcodes started calling the zend_interrupt_function while the
 * internal frame is still on top.
 */
extern ZEND_API void (*zend_interrupt_function)(zend_execute_data *execute_data);

extern ZEND_API void (*zend_error_cb)(int type, zend_string *error_filename, const uint32_t error_lineno, zend_string *message);
extern ZEND_API void (*zend_on_timeout)(int seconds);
extern ZEND_API zend_result (*zend_stream_open_function)(zend_file_handle *handle);
extern void (*zend_printf_to_smart_string)(smart_string *buf, const char *format, va_list ap);
extern void (*zend_printf_to_smart_str)(smart_str *buf, const char *format, va_list ap);
extern ZEND_API char *(*zend_getenv)(const char *name, size_t name_len);
extern ZEND_API zend_string *(*zend_resolve_path)(zend_string *filename);
/* Generate 'size' random bytes into 'bytes' with the OS CSPRNG. */
extern ZEND_ATTRIBUTE_NONNULL ZEND_API zend_result (*zend_random_bytes)(
		void *bytes, size_t size, char *errstr, size_t errstr_size);
/* Generate 'size' random bytes into 'bytes' with a general purpose PRNG (not
 * crypto safe). 'state' must be zeroed before the first call and can be reused.
 */
extern ZEND_ATTRIBUTE_NONNULL ZEND_API void (*zend_random_bytes_insecure)(
		zend_random_bytes_insecure_state *state, void *bytes, size_t size);

/* These two callbacks are especially for opcache */
extern ZEND_API zend_result (*zend_post_startup_cb)(void);
extern ZEND_API void (*zend_post_shutdown_cb)(void);

extern ZEND_API void (*zend_accel_schedule_restart_hook)(int reason);

ZEND_API ZEND_COLD void zend_error(int type, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
ZEND_API ZEND_COLD ZEND_NORETURN void zend_error_noreturn(int type, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
ZEND_API ZEND_COLD ZEND_NORETURN void zend_error_noreturn_unchecked(int type, const char *format, ...);
/* For custom format specifiers like H */
ZEND_API ZEND_COLD void zend_error_unchecked(int type, const char *format, ...);
/* If filename is NULL the default filename is used. */
ZEND_API ZEND_COLD void zend_error_at(int type, zend_string *filename, uint32_t lineno, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 4, 5);
ZEND_API ZEND_COLD ZEND_NORETURN void zend_error_at_noreturn(int type, zend_string *filename, uint32_t lineno, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 4, 5);
ZEND_API ZEND_COLD void zend_error_zstr(int type, zend_string *message);
ZEND_API ZEND_COLD void zend_error_zstr_at(int type, zend_string *filename, uint32_t lineno, zend_string *message);

ZEND_API ZEND_COLD void zend_throw_error(zend_class_entry *exception_ce, const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 2, 3);
ZEND_API ZEND_COLD void zend_type_error(const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 1, 2);
ZEND_API ZEND_COLD void zend_argument_count_error(const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 1, 2);
ZEND_API ZEND_COLD void zend_value_error(const char *format, ...) ZEND_ATTRIBUTE_FORMAT(printf, 1, 2);
/* type should be one of the BP_VAR_* constants, only special messages happen for isset/empty and unset */
ZEND_API ZEND_COLD void zend_illegal_container_offset(const zend_string *container, const zval *offset, int type);

ZEND_COLD void zenderror(const char *error);

/* For internal C errors */
ZEND_API ZEND_COLD ZEND_NORETURN void zend_strerror_noreturn(int type, int errn, const char *message);

/* The following #define is used for code duality in PHP for Engine 1 & 2 */
#define ZEND_STANDARD_CLASS_DEF_PTR zend_standard_class_def
extern ZEND_API zend_class_entry *zend_standard_class_def;
extern ZEND_API zend_utility_values zend_uv;

/* If DTrace is available and enabled */
extern ZEND_API bool zend_dtrace_enabled;
END_EXTERN_C()

#define ZEND_UV(name) (zend_uv.name)

BEGIN_EXTERN_C()
ZEND_API void zend_message_dispatcher(zend_long message, const void *data);

ZEND_API zval *zend_get_configuration_directive(zend_string *name);
END_EXTERN_C()

/* Messages for applications of Zend */
#define ZMSG_FAILED_INCLUDE_FOPEN		1L
#define ZMSG_FAILED_REQUIRE_FOPEN		2L
#define ZMSG_FAILED_HIGHLIGHT_FOPEN		3L
#define ZMSG_MEMORY_LEAK_DETECTED		4L
#define ZMSG_MEMORY_LEAK_REPEATED		5L
#define ZMSG_LOG_SCRIPT_NAME			6L
#define ZMSG_MEMORY_LEAKS_GRAND_TOTAL	7L

typedef enum {
	EH_NORMAL = 0,
	EH_THROW
} zend_error_handling_t;

typedef struct {
	zend_error_handling_t  handling;
	zend_class_entry       *exception;
} zend_error_handling;

BEGIN_EXTERN_C()
ZEND_API void zend_save_error_handling(zend_error_handling *current);
ZEND_API void zend_replace_error_handling(zend_error_handling_t error_handling, zend_class_entry *exception_class, zend_error_handling *current);
ZEND_API void zend_restore_error_handling(zend_error_handling *saved);
ZEND_API void zend_begin_record_errors(void);
ZEND_API void zend_emit_recorded_errors(void);
ZEND_API void zend_emit_recorded_errors_ex(uint32_t num_errors, zend_error_info **errors);
ZEND_API void zend_free_recorded_errors(void);
END_EXTERN_C()

#define DEBUG_BACKTRACE_PROVIDE_OBJECT (1<<0)
#define DEBUG_BACKTRACE_IGNORE_ARGS    (1<<1)

#include "zend_object_handlers.h"
#include "zend_operators.h"

#endif /* ZEND_H */

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