xml.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.               |
   +----------------------------------------------------------------------+
   | Authors: Stig Sæther Bakken <ssb@php.net>                            |
   |          Thies C. Arntzen <thies@thieso.net>                         |
   |          Sterling Hughes <sterling@php.net>                          |
   +----------------------------------------------------------------------+
 */
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#include "php.h"
 
#include "zend_variables.h"
#include "zend_attributes.h"
#include "ext/standard/info.h"
#include "ext/standard/html.h" /* For php_next_utf8_char() */
 
#ifdef HAVE_XML
 
#include "php_xml.h"
#ifdef LIBXML_EXPAT_COMPAT
#include "ext/libxml/php_libxml.h"
#endif
 
#include "xml_arginfo.h"
 
/* Short-term TODO list:
 * - Implement XML_ExternalEntityParserCreate()
 * - XML_SetCommentHandler
 * - XML_SetCdataSectionHandler
 * - XML_SetParamEntityParsing
 */
 
/* Long-term TODO list:
 * - Fix the expat library so you can install your own memory manager
 *   functions
 */
 
/* Known bugs:
 * - Weird things happen with <![CDATA[]]> sections.
 */
 
ZEND_BEGIN_MODULE_GLOBALS(xml)
    XML_Char *default_encoding;
ZEND_END_MODULE_GLOBALS(xml)
 
ZEND_DECLARE_MODULE_GLOBALS(xml)
 
#define XML(v) ZEND_MODULE_GLOBALS_ACCESSOR(xml, v)
 
typedef struct {
    XML_Parser parser;
    XML_Char *target_encoding;
 
    /* Reference to the object itself, for convenience.
     * It is not owned, do not release it. */
    zval index;
 
    zend_object *object;
    zend_fcall_info_cache startElementHandler;
    zend_fcall_info_cache endElementHandler;
    zend_fcall_info_cache characterDataHandler;
    zend_fcall_info_cache processingInstructionHandler;
    zend_fcall_info_cache defaultHandler;
    zend_fcall_info_cache unparsedEntityDeclHandler;
    zend_fcall_info_cache notationDeclHandler;
    zend_fcall_info_cache externalEntityRefHandler;
    zend_fcall_info_cache startNamespaceDeclHandler;
    zend_fcall_info_cache endNamespaceDeclHandler;
    zval data;
    zval info;
 
    int level;
    int toffset;
    int curtag;
    zend_long ctag_index;
    char **ltags;
    bool lastwasopen;
    bool skipwhite;
    bool isparsing;
    bool parsehuge;
    bool case_folding;
 
    XML_Char *baseURI;
 
    zend_object std;
} xml_parser;
 
 
typedef struct {
    XML_Char *name;
    char (*decoding_function)(unsigned short);
    unsigned short (*encoding_function)(unsigned char);
} xml_encoding;
 
/* {{{ dynamically loadable module stuff */
#ifdef COMPILE_DL_XML
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(xml)
#endif /* COMPILE_DL_XML */
/* }}} */
 
#define XML_MAXLEVEL 255 /* XXX this should be dynamic */
 
#define SKIP_TAGSTART(str) ((str) + (parser->toffset > strlen(str) ? strlen(str) : parser->toffset))
 
static zend_class_entry *xml_parser_ce;
static zend_object_handlers xml_parser_object_handlers;
 
/* {{{ function prototypes */
PHP_MINIT_FUNCTION(xml);
PHP_MINFO_FUNCTION(xml);
static PHP_GINIT_FUNCTION(xml);
 
static zend_object *xml_parser_create_object(zend_class_entry *class_type);
static void xml_parser_free_obj(zend_object *object);
static HashTable *xml_parser_get_gc(zend_object *object, zval **table, int *n);
static zend_function *xml_parser_get_constructor(zend_object *object);
 
static zend_string *xml_utf8_decode(const XML_Char *, size_t, const XML_Char *);
inline static unsigned short xml_encode_iso_8859_1(unsigned char);
inline static char xml_decode_iso_8859_1(unsigned short);
inline static unsigned short xml_encode_us_ascii(unsigned char);
inline static char xml_decode_us_ascii(unsigned short);
static void xml_xmlchar_zval(const XML_Char *, int, const XML_Char *, zval *);
static int xml_xmlcharlen(const XML_Char *);
static void xml_add_to_info(xml_parser *parser, const char *name);
inline static zend_string *xml_decode_tag(xml_parser *parser, const XML_Char *tag);
 
void xml_startElementHandler(void *, const XML_Char *, const XML_Char **);
void xml_endElementHandler(void *, const XML_Char *);
void xml_characterDataHandler(void *, const XML_Char *, int);
void xml_processingInstructionHandler(void *, const XML_Char *, const XML_Char *);
void xml_defaultHandler(void *, const XML_Char *, int);
void xml_unparsedEntityDeclHandler(void *, const XML_Char *, const XML_Char *, const XML_Char *, const XML_Char *, const XML_Char *);
void xml_notationDeclHandler(void *, const XML_Char *, const XML_Char *, const XML_Char *, const XML_Char *);
int  xml_externalEntityRefHandler(XML_Parser, const XML_Char *, const XML_Char *, const XML_Char *, const XML_Char *);
 
void xml_startNamespaceDeclHandler(void *, const XML_Char *, const XML_Char *);
void xml_endNamespaceDeclHandler(void *, const XML_Char *);
/* }}} */
 
#ifdef LIBXML_EXPAT_COMPAT
static const zend_module_dep xml_deps[] = {
    ZEND_MOD_REQUIRED("libxml")
    ZEND_MOD_END
};
#endif
 
zend_module_entry xml_module_entry = {
#ifdef LIBXML_EXPAT_COMPAT
    STANDARD_MODULE_HEADER_EX, NULL,
    xml_deps,
#else
    STANDARD_MODULE_HEADER,
#endif
    "xml",                /* extension name */
    ext_functions,        /* extension function list */
    PHP_MINIT(xml),       /* extension-wide startup function */
    NULL,                 /* extension-wide shutdown function */
    NULL,                 /* per-request startup function */
    NULL,                 /* per-request shutdown function */
    PHP_MINFO(xml),       /* information function */
    PHP_XML_VERSION,
    PHP_MODULE_GLOBALS(xml), /* globals descriptor */
    PHP_GINIT(xml),          /* globals ctor */
    NULL,                    /* globals dtor */
    NULL,                    /* post deactivate */
    STANDARD_MODULE_PROPERTIES_EX
};
 
/* All the encoding functions are set to NULL right now, since all
 * the encoding is currently done internally by expat/xmltok.
 */
static const xml_encoding xml_encodings[] = {
    { (XML_Char *)"ISO-8859-1", xml_decode_iso_8859_1, xml_encode_iso_8859_1 },
    { (XML_Char *)"US-ASCII",   xml_decode_us_ascii,   xml_encode_us_ascii   },
    { (XML_Char *)"UTF-8",      NULL,                  NULL                  },
    { (XML_Char *)NULL,         NULL,                  NULL                  }
};
 
static XML_Memory_Handling_Suite php_xml_mem_hdlrs;
 
/* }}} */
 
/* {{{ startup, shutdown and info functions */
static PHP_GINIT_FUNCTION(xml)
{
#if defined(COMPILE_DL_XML) && defined(ZTS)
    ZEND_TSRMLS_CACHE_UPDATE();
#endif
    xml_globals->default_encoding = (XML_Char*)"UTF-8";
}
 
static void *php_xml_malloc_wrapper(size_t sz)
{
    return emalloc(sz);
}
 
static void *php_xml_realloc_wrapper(void *ptr, size_t sz)
{
    return erealloc(ptr, sz);
}
 
static void php_xml_free_wrapper(void *ptr)
{
    if (ptr != NULL) {
        efree(ptr);
    }
}
 
PHP_MINIT_FUNCTION(xml)
{
    xml_parser_ce = register_class_XMLParser();
    xml_parser_ce->create_object = xml_parser_create_object;
    xml_parser_ce->default_object_handlers = &xml_parser_object_handlers;
 
    memcpy(&xml_parser_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
    xml_parser_object_handlers.offset = XtOffsetOf(xml_parser, std);
    xml_parser_object_handlers.free_obj = xml_parser_free_obj;
    xml_parser_object_handlers.get_gc = xml_parser_get_gc;
    xml_parser_object_handlers.get_constructor = xml_parser_get_constructor;
    xml_parser_object_handlers.clone_obj = NULL;
    xml_parser_object_handlers.compare = zend_objects_not_comparable;
 
    register_xml_symbols(module_number);
 
    /* this object should not be pre-initialised at compile time,
       as the order of members may vary */
 
    php_xml_mem_hdlrs.malloc_fcn = php_xml_malloc_wrapper;
    php_xml_mem_hdlrs.realloc_fcn = php_xml_realloc_wrapper;
    php_xml_mem_hdlrs.free_fcn = php_xml_free_wrapper;
 
    return SUCCESS;
}
 
PHP_MINFO_FUNCTION(xml)
{
    php_info_print_table_start();
    php_info_print_table_row(2, "XML Support", "active");
    php_info_print_table_row(2, "XML Namespace Support", "active");
#if defined(LIBXML_DOTTED_VERSION) && defined(LIBXML_EXPAT_COMPAT)
    php_info_print_table_row(2, "libxml2 Version", LIBXML_DOTTED_VERSION);
#else
    php_info_print_table_row(2, "EXPAT Version", XML_ExpatVersion());
#endif
    php_info_print_table_end();
}
/* }}} */
 
/* {{{ extension-internal functions */
 
static int xml_parse_helper(xml_parser *parser, const char *data, size_t data_len, bool is_final)
{
    ZEND_ASSERT(!parser->isparsing);
 
    /* libxml2 specific options */
#ifdef LIBXML_EXPAT_COMPAT
    /* TODO: In libxml2 2.14.0 change this to the new options API so we don't rely on deprecated APIs. */
    ZEND_DIAGNOSTIC_IGNORED_START("-Wdeprecated-declarations")
    /* See xmlInitSAXParserCtxt() and xmlCtxtUseOptions() */
    if (parser->parsehuge) {
        parser->parser->parser->options |= XML_PARSE_HUGE;
        xmlDictSetLimit(parser->parser->parser->dict, 0);
    } else {
        parser->parser->parser->options &= ~XML_PARSE_HUGE;
        xmlDictSetLimit(parser->parser->parser->dict, XML_MAX_DICTIONARY_LIMIT);
    }
    ZEND_DIAGNOSTIC_IGNORED_END
#endif
 
    parser->isparsing = 1;
    int ret = XML_Parse(parser->parser, (const XML_Char *) data, data_len, is_final);
    parser->isparsing = 0;
    return ret;
}
 
static void xml_xmlchar_zval(const XML_Char *s, int len, const XML_Char *encoding, zval *ret)
{
    if (s == NULL) {
        ZVAL_FALSE(ret);
        return;
    }
    if (len == 0) {
        len = xml_xmlcharlen(s);
    }
    ZVAL_STR(ret, xml_utf8_decode(s, len, encoding));
}
/* }}} */
 
static inline xml_parser *xml_parser_from_obj(zend_object *obj) {
    return (xml_parser *)((char *)(obj) - XtOffsetOf(xml_parser, std));
}
 
#define Z_XMLPARSER_P(zv) xml_parser_from_obj(Z_OBJ_P(zv))
 
static zend_object *xml_parser_create_object(zend_class_entry *class_type) {
    xml_parser *intern = zend_object_alloc(sizeof(xml_parser), class_type);
    memset(intern, 0, sizeof(xml_parser) - sizeof(zend_object));
 
    zend_object_std_init(&intern->std, class_type);
    object_properties_init(&intern->std, class_type);
 
    return &intern->std;
}
 
static void xml_parser_free_ltags(xml_parser *parser)
{
    if (parser->ltags) {
        int inx;
        for (inx = 0; ((inx < parser->level) && (inx < XML_MAXLEVEL)); inx++)
            efree(parser->ltags[ inx ]);
        efree(parser->ltags);
    }
}
 
static void xml_parser_free_obj(zend_object *object)
{
    xml_parser *parser = xml_parser_from_obj(object);
 
    zval_ptr_dtor(&parser->info);
    zval_ptr_dtor(&parser->data);
    if (parser->parser) {
        XML_ParserFree(parser->parser);
    }
    xml_parser_free_ltags(parser);
    if (ZEND_FCC_INITIALIZED(parser->startElementHandler)) {
        zend_fcc_dtor(&parser->startElementHandler);
        parser->startElementHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->endElementHandler)) {
        zend_fcc_dtor(&parser->endElementHandler);
        parser->endElementHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->characterDataHandler)) {
        zend_fcc_dtor(&parser->characterDataHandler);
        parser->characterDataHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->processingInstructionHandler)) {
        zend_fcc_dtor(&parser->processingInstructionHandler);
        parser->processingInstructionHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->defaultHandler)) {
        zend_fcc_dtor(&parser->defaultHandler);
        parser->defaultHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->unparsedEntityDeclHandler)) {
        zend_fcc_dtor(&parser->unparsedEntityDeclHandler);
        parser->unparsedEntityDeclHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->notationDeclHandler)) {
        zend_fcc_dtor(&parser->notationDeclHandler);
        parser->notationDeclHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->externalEntityRefHandler)) {
        zend_fcc_dtor(&parser->externalEntityRefHandler);
        parser->externalEntityRefHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->startNamespaceDeclHandler)) {
        zend_fcc_dtor(&parser->startNamespaceDeclHandler);
        parser->startNamespaceDeclHandler.function_handler = NULL;
    }
    if (ZEND_FCC_INITIALIZED(parser->endNamespaceDeclHandler)) {
        zend_fcc_dtor(&parser->endNamespaceDeclHandler);
        parser->endNamespaceDeclHandler.function_handler = NULL;
    }
    if (parser->baseURI) {
        efree(parser->baseURI);
    }
    if (parser->object) {
        OBJ_RELEASE(parser->object);
    }
 
    zend_object_std_dtor(&parser->std);
}
 
static HashTable *xml_parser_get_gc(zend_object *object, zval **table, int *n)
{
    xml_parser *parser = xml_parser_from_obj(object);
 
    zend_get_gc_buffer *gc_buffer = zend_get_gc_buffer_create();
    if (parser->object) {
        zend_get_gc_buffer_add_obj(gc_buffer, parser->object);
    }
    if (ZEND_FCC_INITIALIZED(parser->startElementHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->startElementHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->endElementHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->endElementHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->characterDataHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->characterDataHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->processingInstructionHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->processingInstructionHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->defaultHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->defaultHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->unparsedEntityDeclHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->unparsedEntityDeclHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->notationDeclHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->notationDeclHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->externalEntityRefHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->externalEntityRefHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->startNamespaceDeclHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->startNamespaceDeclHandler);
    }
    if (ZEND_FCC_INITIALIZED(parser->endNamespaceDeclHandler)) {
        zend_get_gc_buffer_add_fcc(gc_buffer, &parser->endNamespaceDeclHandler);
    }
    zend_get_gc_buffer_add_zval(gc_buffer, &parser->data);
    zend_get_gc_buffer_add_zval(gc_buffer, &parser->info);
 
    zend_get_gc_buffer_use(gc_buffer, table, n);
 
    return zend_std_get_properties(object);
}
 
static zend_function *xml_parser_get_constructor(zend_object *object) {
    zend_throw_error(NULL, "Cannot directly construct XMLParser, use xml_parser_create() or xml_parser_create_ns() instead");
    return NULL;
}
 
/* This is always called to simplify the mess to deal with BC breaks, but only set a new handler if it is initialized */
static void xml_set_handler(zend_fcall_info_cache *const parser_handler, const zend_fcall_info_cache *const fn)
{
    /* If we have already a handler, release it */
    if (ZEND_FCC_INITIALIZED(*parser_handler)) {
        zend_fcc_dtor(parser_handler);
        parser_handler->function_handler = NULL;
    }
 
    if (ZEND_FCC_INITIALIZED(*fn)) {
        zend_fcc_dup(parser_handler, fn);
    }
}
 
/* {{{ xml_encode_iso_8859_1() */
inline static unsigned short xml_encode_iso_8859_1(unsigned char c)
{
    return (unsigned short)c;
}
/* }}} */
 
/* {{{ xml_decode_iso_8859_1() */
inline static char xml_decode_iso_8859_1(unsigned short c)
{
    return (char)(c > 0xff ? '?' : c);
}
/* }}} */
 
/* {{{ xml_encode_us_ascii() */
inline static unsigned short xml_encode_us_ascii(unsigned char c)
{
    return (unsigned short)c;
}
/* }}} */
 
/* {{{ xml_decode_us_ascii() */
inline static char xml_decode_us_ascii(unsigned short c)
{
    return (char)(c > 0x7f ? '?' : c);
}
/* }}} */
 
/* {{{ xml_get_encoding() */
static const xml_encoding *xml_get_encoding(const XML_Char *name)
{
    const xml_encoding *enc = &xml_encodings[0];
 
    while (enc && enc->name) {
        if (strcasecmp((char *)name, (char *)enc->name) == 0) {
            return enc;
        }
        enc++;
    }
    return NULL;
}
/* }}} */
 
/* {{{ xml_utf8_decode() */
static zend_string *xml_utf8_decode(const XML_Char *s, size_t len, const XML_Char *encoding)
{
    size_t pos = 0;
    unsigned int c;
    char (*decoder)(unsigned short) = NULL;
    const xml_encoding *enc = xml_get_encoding(encoding);
    zend_string *str;
 
    if (enc) {
        decoder = enc->decoding_function;
    }
 
    if (decoder == NULL) {
        /* If the target encoding was unknown, or no decoder function
         * was specified, return the UTF-8-encoded data as-is.
         */
        str = zend_string_init((char *)s, len, 0);
        return str;
    }
 
    str = zend_string_alloc(len, 0);
    ZSTR_LEN(str) = 0;
    while (pos < len) {
        zend_result status = FAILURE;
        c = php_next_utf8_char((const unsigned char*)s, len, &pos, &status);
 
        if (status == FAILURE || c > 0xFFU) {
            c = '?';
        }
 
        ZSTR_VAL(str)[ZSTR_LEN(str)++] = decoder(c);
    }
    ZSTR_VAL(str)[ZSTR_LEN(str)] = '\0';
    if (ZSTR_LEN(str) < len) {
        str = zend_string_truncate(str, ZSTR_LEN(str), 0);
    }
 
    return str;
}
/* }}} */
 
/* {{{ xml_xmlcharlen() */
static int xml_xmlcharlen(const XML_Char *s)
{
    int len = 0;
 
    while (*s) {
        len++;
        s++;
    }
    return len;
}
/* }}} */
 
/* {{{ xml_add_to_info() */
static void xml_add_to_info(xml_parser *parser, const char *name)
{
    zval *element;
 
    if (Z_ISUNDEF(parser->info) || UNEXPECTED(Z_TYPE_P(Z_REFVAL(parser->info)) != IS_ARRAY)) {
        return;
    }
 
    SEPARATE_ARRAY(Z_REFVAL(parser->info));
    zend_array *arr = Z_ARRVAL_P(Z_REFVAL(parser->info));
 
    size_t name_len = strlen(name);
    if ((element = zend_hash_str_find(arr, name, name_len)) == NULL) {
        zval values;
        array_init(&values);
        element = zend_hash_str_update(arr, name, name_len, &values);
    }
 
    add_next_index_long(element, parser->curtag);
 
    parser->curtag++;
}
/* }}} */
 
/* {{{ xml_decode_tag() */
static zend_string *xml_decode_tag(xml_parser *parser, const XML_Char *tag)
{
    zend_string *str;
 
    str = xml_utf8_decode(tag, xml_xmlcharlen(tag), parser->target_encoding);
 
    if (parser->case_folding) {
        zend_str_toupper(ZSTR_VAL(str), ZSTR_LEN(str));
    }
 
    return str;
}
/* }}} */
 
static zval *xml_get_separated_data(xml_parser *parser)
{
    if (EXPECTED(Z_TYPE_P(Z_REFVAL(parser->data)) == IS_ARRAY)) {
        SEPARATE_ARRAY(Z_REFVAL(parser->data));
        return Z_REFVAL(parser->data);
    }
    return NULL;
}
 
static zval *xml_get_ctag(xml_parser *parser)
{
    zval *data = xml_get_separated_data(parser);
    if (EXPECTED(data)) {
        zval *zv = zend_hash_index_find_deref(Z_ARRVAL_P(data), parser->ctag_index);
        if (EXPECTED(zv && Z_TYPE_P(zv) == IS_ARRAY)) {
            SEPARATE_ARRAY(zv);
            return zv;
        }
    }
    return NULL;
}
 
/* {{{ xml_startElementHandler() */
void xml_startElementHandler(void *userData, const XML_Char *name, const XML_Char **attributes)
{
    xml_parser *parser = (xml_parser *)userData;
    const char **attrs = (const char **) attributes;
    zend_string *att, *tag_name, *val;
 
    if (!parser) {
        return;
    }
 
    parser->level++;
 
    tag_name = xml_decode_tag(parser, name);
 
    if (ZEND_FCC_INITIALIZED(parser->startElementHandler)) {
        zval args[3];
        ZVAL_COPY(&args[0], &parser->index);
        ZVAL_STRING(&args[1], SKIP_TAGSTART(ZSTR_VAL(tag_name)));
        array_init(&args[2]);
 
        while (attributes && *attributes) {
            zval tmp;
 
            att = xml_decode_tag(parser, attributes[0]);
            val = xml_utf8_decode(attributes[1], strlen((char *)attributes[1]), parser->target_encoding);
 
            ZVAL_STR(&tmp, val);
            zend_symtable_update(Z_ARRVAL(args[2]), att, &tmp);
 
            attributes += 2;
 
            zend_string_release_ex(att, 0);
        }
 
        zend_call_known_fcc(&parser->startElementHandler, /* retval */ NULL, /* param_count */ 3, args, /* named_params */ NULL);
        zval_ptr_dtor(&args[0]);
        zval_ptr_dtor(&args[1]);
        zval_ptr_dtor(&args[2]);
    }
 
    if (!Z_ISUNDEF(parser->data) && !EG(exception)) {
        if (parser->level <= XML_MAXLEVEL)  {
            zval tag, atr;
            int atcnt = 0;
 
            array_init(&tag);
            array_init(&atr);
 
            char *skipped_tag_name = SKIP_TAGSTART(ZSTR_VAL(tag_name));
 
            xml_add_to_info(parser, skipped_tag_name);
 
            add_assoc_string(&tag, "tag", skipped_tag_name);
            add_assoc_string(&tag, "type", "open");
            add_assoc_long(&tag, "level", parser->level);
 
            parser->ltags[parser->level-1] = estrdup(ZSTR_VAL(tag_name));
            parser->lastwasopen = 1;
 
            attributes = (const XML_Char **) attrs;
 
            while (attributes && *attributes) {
                zval tmp;
 
                att = xml_decode_tag(parser, attributes[0]);
                val = xml_utf8_decode(attributes[1], strlen((char *)attributes[1]), parser->target_encoding);
 
                ZVAL_STR(&tmp, val);
                zend_symtable_update(Z_ARRVAL(atr), att, &tmp);
 
                atcnt++;
                attributes += 2;
 
                zend_string_release_ex(att, 0);
            }
 
            if (atcnt) {
                zend_hash_str_add(Z_ARRVAL(tag), "attributes", sizeof("attributes") - 1, &atr);
            } else {
                zval_ptr_dtor(&atr);
            }
 
            zval *data = xml_get_separated_data(parser);
            if (EXPECTED(data)) {
                /* Note: due to array resizes or user interference,
                 * we have to store an index instead of a zval into the array's memory. */
                zend_array *arr = Z_ARRVAL_P(data);
                if (EXPECTED(zend_hash_next_index_insert(arr, &tag))) {
                    parser->ctag_index = arr->nNextFreeElement - 1;
                } else {
                    zval_ptr_dtor(&tag);
                }
            } else {
                zval_ptr_dtor(&tag);
            }
        } else if (parser->level == (XML_MAXLEVEL + 1)) {
                        php_error_docref(NULL, E_WARNING, "Maximum depth exceeded - Results truncated");
        }
    }
 
    zend_string_release_ex(tag_name, 0);
}
/* }}} */
 
/* {{{ xml_endElementHandler() */
void xml_endElementHandler(void *userData, const XML_Char *name)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser) {
        return;
    }
 
    zend_string *tag_name = xml_decode_tag(parser, name);
 
    if (ZEND_FCC_INITIALIZED(parser->endElementHandler)) {
        zval args[2];
        ZVAL_COPY(&args[0], &parser->index);
        ZVAL_STRING(&args[1], SKIP_TAGSTART(ZSTR_VAL(tag_name)));
 
        zend_call_known_fcc(&parser->endElementHandler, /* retval */ NULL, /* param_count */ 2, args, /* named_params */ NULL);
        zval_ptr_dtor(&args[0]);
        zval_ptr_dtor(&args[1]);
    }
 
    if (!Z_ISUNDEF(parser->data) && !EG(exception)) {
        zval tag;
 
        if (parser->lastwasopen) {
            zval *zv = xml_get_ctag(parser);
            if (EXPECTED(zv)) {
                add_assoc_string(zv, "type", "complete");
            }
        } else {
            char *skipped_tag_name = SKIP_TAGSTART(ZSTR_VAL(tag_name));
 
            xml_add_to_info(parser, skipped_tag_name);
 
            zval *data = xml_get_separated_data(parser);
            if (EXPECTED(data)) {
                array_init(&tag);
                add_assoc_string(&tag, "tag", skipped_tag_name);
                add_assoc_string(&tag, "type", "close");
                add_assoc_long(&tag, "level", parser->level);
                zend_hash_next_index_insert(Z_ARRVAL_P(data), &tag);
            }
        }
 
        parser->lastwasopen = 0;
    }
 
    zend_string_release_ex(tag_name, 0);
 
    if ((parser->ltags) && (parser->level <= XML_MAXLEVEL)) {
        efree(parser->ltags[parser->level-1]);
    }
 
    parser->level--;
}
/* }}} */
 
/* {{{ xml_characterDataHandler() */
void xml_characterDataHandler(void *userData, const XML_Char *s, int len)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser) {
        return;
    }
 
    if (ZEND_FCC_INITIALIZED(parser->characterDataHandler)) {
        zval args[2];
        ZVAL_COPY(&args[0], &parser->index);
        xml_xmlchar_zval(s, len, parser->target_encoding, &args[1]);
 
        zend_call_known_fcc(&parser->characterDataHandler, /* retval */ NULL, /* param_count */ 2, args, /* named_params */ NULL);
        zval_ptr_dtor(&args[0]);
        zval_ptr_dtor(&args[1]);
    }
 
    if (Z_ISUNDEF(parser->data) || EG(exception)) {
        return;
    }
 
    bool doprint = 0;
    zend_string *decoded_value;
    decoded_value = xml_utf8_decode(s, len, parser->target_encoding);
    if (parser->skipwhite) {
        for (size_t i = 0; i < ZSTR_LEN(decoded_value); i++) {
            switch (ZSTR_VAL(decoded_value)[i]) {
                case ' ':
                case '\t':
                case '\n':
                    continue;
                default:
                    doprint = 1;
                    break;
            }
            if (doprint) {
                break;
            }
        }
    }
    if (parser->lastwasopen) {
        zval *ctag = xml_get_ctag(parser);
        if (UNEXPECTED(!ctag)) {
            zend_string_release_ex(decoded_value, false);
            return;
        }
 
        zval *myval;
        /* check if the current tag already has a value - if yes append to that! */
        if ((myval = zend_hash_find(Z_ARRVAL_P(ctag), ZSTR_KNOWN(ZEND_STR_VALUE))) && Z_TYPE_P(myval) == IS_STRING) {
            size_t newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
            Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
            strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
                    ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
            zend_string_release_ex(decoded_value, 0);
        } else {
            if (doprint || (! parser->skipwhite)) {
                add_assoc_str(ctag, "value", decoded_value);
            } else {
                zend_string_release_ex(decoded_value, 0);
            }
        }
    } else {
        zval tag;
        zval *curtag, *mytype, *myval;
 
        zval *data = xml_get_separated_data(parser);
        if (UNEXPECTED(!data)) {
            zend_string_release_ex(decoded_value, false);
            return;
        }
 
        ZEND_HASH_REVERSE_FOREACH_VAL(Z_ARRVAL_P(data), curtag) {
            if (EXPECTED(Z_TYPE_P(curtag) == IS_ARRAY) && (mytype = zend_hash_str_find(Z_ARRVAL_P(curtag),"type", sizeof("type") - 1))) {
                if (EXPECTED(Z_TYPE_P(mytype) == IS_STRING) && zend_string_equals_literal(Z_STR_P(mytype), "cdata")) {
                    SEPARATE_ARRAY(curtag);
                    if ((myval = zend_hash_find(Z_ARRVAL_P(curtag), ZSTR_KNOWN(ZEND_STR_VALUE)))) {
                        size_t newlen = Z_STRLEN_P(myval) + ZSTR_LEN(decoded_value);
                        Z_STR_P(myval) = zend_string_extend(Z_STR_P(myval), newlen, 0);
                        strncpy(Z_STRVAL_P(myval) + Z_STRLEN_P(myval) - ZSTR_LEN(decoded_value),
                                ZSTR_VAL(decoded_value), ZSTR_LEN(decoded_value) + 1);
                        zend_string_release_ex(decoded_value, 0);
                        return;
                    }
                }
            }
            break;
        } ZEND_HASH_FOREACH_END();
        if (parser->level <= XML_MAXLEVEL && parser->level > 0 && (doprint || (! parser->skipwhite))) {
            array_init(&tag);
            xml_add_to_info(parser,SKIP_TAGSTART(parser->ltags[parser->level-1]));
            add_assoc_string(&tag, "tag", SKIP_TAGSTART(parser->ltags[parser->level-1]));
            add_assoc_str(&tag, "value", decoded_value);
            add_assoc_string(&tag, "type", "cdata");
            add_assoc_long(&tag, "level", parser->level);
            zend_hash_next_index_insert(Z_ARRVAL_P(data), &tag);
        } else if (parser->level == (XML_MAXLEVEL + 1)) {
                                php_error_docref(NULL, E_WARNING, "Maximum depth exceeded - Results truncated");
        } else {
            zend_string_release_ex(decoded_value, 0);
        }
    }
}
/* }}} */
 
/* {{{ xml_processingInstructionHandler() */
void xml_processingInstructionHandler(void *userData, const XML_Char *target, const XML_Char *data)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->processingInstructionHandler)) {
        return;
    }
 
    zval args[3];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(target, 0, parser->target_encoding, &args[1]);
    xml_xmlchar_zval(data, 0, parser->target_encoding, &args[2]);
 
    zend_call_known_fcc(&parser->processingInstructionHandler, /* retval */ NULL, /* param_count */ 3, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
    zval_ptr_dtor(&args[2]);
}
/* }}} */
 
/* {{{ xml_defaultHandler() */
void xml_defaultHandler(void *userData, const XML_Char *s, int len)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->defaultHandler)) {
        return;
    }
 
    zval args[2];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(s, len, parser->target_encoding, &args[1]);
 
    zend_call_known_fcc(&parser->defaultHandler, /* retval */ NULL, /* param_count */ 2, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
}
/* }}} */
 
/* {{{ xml_unparsedEntityDeclHandler() */
void xml_unparsedEntityDeclHandler(void *userData,
    const XML_Char *entityName, const XML_Char *base, const XML_Char *systemId,
    const XML_Char *publicId, const XML_Char *notationName)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->unparsedEntityDeclHandler)) {
        return;
    }
 
    zval args[6];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(entityName, 0, parser->target_encoding, &args[1]);
    xml_xmlchar_zval(base, 0, parser->target_encoding, &args[2]);
    xml_xmlchar_zval(systemId, 0, parser->target_encoding, &args[3]);
    xml_xmlchar_zval(publicId, 0, parser->target_encoding, &args[4]);
    xml_xmlchar_zval(notationName, 0, parser->target_encoding, &args[5]);
 
    zend_call_known_fcc(&parser->unparsedEntityDeclHandler, /* retval */ NULL, /* param_count */ 6, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
    zval_ptr_dtor(&args[2]);
    zval_ptr_dtor(&args[3]);
    zval_ptr_dtor(&args[4]);
    zval_ptr_dtor(&args[5]);
}
/* }}} */
 
/* {{{ xml_notationDeclHandler() */
void xml_notationDeclHandler(void *userData, const XML_Char *notationName,
    const XML_Char *base, const XML_Char *systemId, const XML_Char *publicId)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->notationDeclHandler)) {
        return;
    }
 
    zval args[5];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(notationName, 0, parser->target_encoding, &args[1]);
    xml_xmlchar_zval(base, 0, parser->target_encoding, &args[2]);
    xml_xmlchar_zval(systemId, 0, parser->target_encoding, &args[3]);
    xml_xmlchar_zval(publicId, 0, parser->target_encoding, &args[4]);
 
    zend_call_known_fcc(&parser->notationDeclHandler, /* retval */ NULL, /* param_count */ 5, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
    zval_ptr_dtor(&args[2]);
    zval_ptr_dtor(&args[3]);
    zval_ptr_dtor(&args[4]);
}
/* }}} */
 
/* {{{ xml_externalEntityRefHandler() */
int xml_externalEntityRefHandler(XML_Parser userData, const XML_Char *openEntityNames,
    const XML_Char *base, const XML_Char *systemId, const XML_Char *publicId)
{
    xml_parser *parser = XML_GetUserData(userData);
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->externalEntityRefHandler)) {
        return 0;
    }
 
    int ret = 0; /* abort if no handler is set (should be configurable?) */
    zval args[5];
    zval retval;
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(openEntityNames, 0, parser->target_encoding, &args[1]);
    xml_xmlchar_zval(base, 0, parser->target_encoding, &args[2]);
    xml_xmlchar_zval(systemId, 0, parser->target_encoding, &args[3]);
    xml_xmlchar_zval(publicId, 0, parser->target_encoding, &args[4]);
 
    zend_call_known_fcc(&parser->externalEntityRefHandler, /* retval */ &retval, /* param_count */ 5, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
    zval_ptr_dtor(&args[2]);
    zval_ptr_dtor(&args[3]);
    zval_ptr_dtor(&args[4]);
 
    /* TODO Better handling from callable return value */
    if (!Z_ISUNDEF(retval)) {
        convert_to_long(&retval);
        ret = Z_LVAL(retval);
    } else {
        ret = 0;
    }
    return ret;
}
/* }}} */
 
/* {{{ xml_startNamespaceDeclHandler() */
void xml_startNamespaceDeclHandler(void *userData,const XML_Char *prefix, const XML_Char *uri)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->startNamespaceDeclHandler)) {
        return;
    }
 
    zval args[3];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(prefix, 0, parser->target_encoding, &args[1]);
    xml_xmlchar_zval(uri, 0, parser->target_encoding, &args[2]);
 
    zend_call_known_fcc(&parser->startNamespaceDeclHandler, /* retval */ NULL, /* param_count */ 3, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
    zval_ptr_dtor(&args[2]);
}
/* }}} */
 
/* {{{ xml_endNamespaceDeclHandler() */
void xml_endNamespaceDeclHandler(void *userData, const XML_Char *prefix)
{
    xml_parser *parser = (xml_parser *)userData;
 
    if (!parser || !ZEND_FCC_INITIALIZED(parser->endNamespaceDeclHandler)) {
        return;
    }
 
    zval args[2];
 
    ZVAL_COPY(&args[0], &parser->index);
    xml_xmlchar_zval(prefix, 0, parser->target_encoding, &args[1]);
 
    zend_call_known_fcc(&parser->endNamespaceDeclHandler, /* retval */ NULL, /* param_count */ 2, args, /* named_params */ NULL);
    zval_ptr_dtor(&args[0]);
    zval_ptr_dtor(&args[1]);
}
/* }}} */
 
/************************* EXTENSION FUNCTIONS *************************/
 
static void php_xml_parser_create_impl(INTERNAL_FUNCTION_PARAMETERS, int ns_support) /* {{{ */
{
    xml_parser *parser;
    int auto_detect = 0;
 
    zend_string *encoding_param = NULL;
 
    char *ns_param = NULL;
    size_t ns_param_len = 0;
 
    XML_Char *encoding;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), (ns_support ? "|S!s": "|S!"), &encoding_param, &ns_param, &ns_param_len) == FAILURE) {
        RETURN_THROWS();
    }
 
    if (encoding_param != NULL) {
        /* The supported encoding types are hardcoded here because
         * we are limited to the encodings supported by expat/xmltok.
         */
        if (ZSTR_LEN(encoding_param) == 0) {
            encoding = XML(default_encoding);
            auto_detect = 1;
        } else if (zend_string_equals_literal_ci(encoding_param, "ISO-8859-1")) {
            encoding = (XML_Char*)"ISO-8859-1";
        } else if (zend_string_equals_literal_ci(encoding_param, "UTF-8")) {
            encoding = (XML_Char*)"UTF-8";
        } else if (zend_string_equals_literal_ci(encoding_param, "US-ASCII")) {
            encoding = (XML_Char*)"US-ASCII";
        } else {
            zend_argument_value_error(1, "is not a supported source encoding");
            RETURN_THROWS();
        }
    } else {
        encoding = XML(default_encoding);
    }
 
    if (ns_support && ns_param == NULL){
        ns_param = ":";
    }
 
    object_init_ex(return_value, xml_parser_ce);
    parser = Z_XMLPARSER_P(return_value);
    parser->parser = XML_ParserCreate_MM((auto_detect ? NULL : encoding),
                                         &php_xml_mem_hdlrs, (XML_Char*)ns_param);
 
    parser->target_encoding = encoding;
    parser->case_folding = 1;
    parser->isparsing = 0;
    parser->parsehuge = false; /* It's the default for BC & DoS protection */
 
    XML_SetUserData(parser->parser, parser);
    ZVAL_COPY_VALUE(&parser->index, return_value);
}
/* }}} */
 
/* {{{ Create an XML parser */
PHP_FUNCTION(xml_parser_create)
{
    php_xml_parser_create_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */
 
/* {{{ Create an XML parser */
PHP_FUNCTION(xml_parser_create_ns)
{
    php_xml_parser_create_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */
 
static bool php_xml_check_string_method_arg(
    unsigned int arg_num,
    zend_object *object,
    zend_string *method_name,
    zend_fcall_info_cache *const parser_handler_fcc
) {
    if (ZSTR_LEN(method_name) == 0) {
        ZEND_ASSERT(arg_num != 0);
        /* Unset handler */
        return true;
    }
 
    if (!object) {
        ZEND_ASSERT(arg_num != 0);
        zend_argument_value_error(arg_num, "an object must be set via xml_set_object() to be able to lookup method");
        return false;
    }
 
    zend_class_entry *ce = object->ce;
    zend_function *method_ptr = zend_hash_find_ptr_lc(&ce->function_table, method_name);
    if (!method_ptr) {
        if (arg_num) {
            zend_argument_value_error(arg_num, "method %s::%s() does not exist", ZSTR_VAL(ce->name), ZSTR_VAL(method_name));
        }
        return false;
    }
 
    parser_handler_fcc->function_handler = method_ptr;
    /* We set the calling scope to NULL to be able to differentiate a "method" set from a proper callable */
    parser_handler_fcc->calling_scope = NULL;
    parser_handler_fcc->called_scope = ce;
    parser_handler_fcc->object = object;
 
    return true;
}
 
#define PHP_XML_CHECK_NEW_THIS_METHODS(parser_to_check, new_this_obj, fcc_field, handler_set_method) \
    if ( \
        ZEND_FCC_INITIALIZED(parser_to_check->fcc_field) \
        && parser_to_check->fcc_field.object == parser_to_check->object \
        && parser_to_check->fcc_field.calling_scope == NULL \
    ) { \
        zend_string *method_name = zend_string_copy(parser_to_check->fcc_field.function_handler->common.function_name); \
        zend_fcc_dtor(&parser_to_check->fcc_field); \
        bool status = php_xml_check_string_method_arg(0, new_this_obj, method_name, &parser_to_check->fcc_field); \
        if (status == false) { \
            zend_argument_value_error(2, "cannot safely swap to object of class %s as method \"%s\" does not exist, which was set via " handler_set_method, \
            ZSTR_VAL(new_this_obj->ce->name), ZSTR_VAL(method_name)); \
            zend_string_release(method_name); \
            RETURN_THROWS(); \
        } \
        zend_string_release(method_name); \
        zend_fcc_addref(&parser_to_check->fcc_field); \
    }
 
 
/* {{{ Set up object which should be used for callbacks */
PHP_FUNCTION(xml_set_object)
{
    xml_parser *parser;
    zval *pind, *mythis;
    zend_object *new_this;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "Oo", &pind, xml_parser_ce, &mythis) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    new_this = Z_OBJ_P(mythis);
 
    if (parser->object) {
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, startElementHandler, "xml_set_element_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, endElementHandler, "xml_set_element_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, characterDataHandler, "xml_set_character_data_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, processingInstructionHandler, "xml_set_processing_instruction_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, defaultHandler, "xml_set_default_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, unparsedEntityDeclHandler, "xml_set_unparsed_entity_decl_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, notationDeclHandler, "xml_set_notation_decl_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, externalEntityRefHandler, "xml_set_external_entity_ref_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, startNamespaceDeclHandler, "xml_set_start_namespace_decl_handler()");
        PHP_XML_CHECK_NEW_THIS_METHODS(parser, new_this, endNamespaceDeclHandler, "xml_set_end_namespace_decl_handler()");
 
        OBJ_RELEASE(parser->object);
    }
 
    parser->object = new_this;
    GC_ADDREF(parser->object);
 
    RETURN_TRUE;
}
/* }}} */
 
/* {{{ Set up start and end element handlers */
PHP_FUNCTION(xml_set_element_handler)
{
    xml_parser *parser;
    zval *pind;
    zend_fcall_info start_fci = {0};
    zend_fcall_info_cache start_fcc = {0};
    zend_fcall_info end_fci = {0};
    zend_fcall_info_cache end_fcc = {0};
    zend_string *start_method_name = NULL;
    zend_string *end_method_name = NULL;
 
    if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OF!F!", &pind, xml_parser_ce, &start_fci, &start_fcc, &end_fci, &end_fcc) == SUCCESS) {
        parser = Z_XMLPARSER_P(pind);
        goto set_handlers;
    }
    zend_release_fcall_info_cache(&start_fcc);
    zend_release_fcall_info_cache(&end_fcc);
 
    if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OF!S", &pind, xml_parser_ce, &start_fci, &start_fcc, &end_method_name) == SUCCESS) {
        parser = Z_XMLPARSER_P(pind);
 
        php_error_docref(NULL, E_DEPRECATED, "Passing non-callable strings is deprecated since 8.4");
        if (UNEXPECTED(EG(exception))) {
            zend_release_fcall_info_cache(&start_fcc);
            zend_release_fcall_info_cache(&end_fcc);
            RETURN_THROWS();
        }
 
        bool status = php_xml_check_string_method_arg(3, parser->object, end_method_name, &end_fcc);
        if (status == false) {
            zend_release_fcall_info_cache(&start_fcc);
            zend_release_fcall_info_cache(&end_fcc);
            RETURN_THROWS();
        }
    } else if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OSF!", &pind, xml_parser_ce, &start_method_name, &end_fci, &end_fcc) == SUCCESS) {
        parser = Z_XMLPARSER_P(pind);
 
        php_error_docref(NULL, E_DEPRECATED, "Passing non-callable strings is deprecated since 8.4");
        if (UNEXPECTED(EG(exception))) {
            zend_release_fcall_info_cache(&start_fcc);
            zend_release_fcall_info_cache(&end_fcc);
            RETURN_THROWS();
        }
 
        bool status = php_xml_check_string_method_arg(2, parser->object, start_method_name, &start_fcc);
        if (status == false) {
            zend_release_fcall_info_cache(&start_fcc);
            zend_release_fcall_info_cache(&end_fcc);
            RETURN_THROWS();
        }
    } else if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OSS", &pind, xml_parser_ce, &start_method_name, &end_method_name) == SUCCESS) {
        zend_release_fcall_info_cache(&start_fcc);
        zend_release_fcall_info_cache(&end_fcc);
 
        php_error_docref(NULL, E_DEPRECATED, "Passing non-callable strings is deprecated since 8.4");
        if (UNEXPECTED(EG(exception))) {
            RETURN_THROWS();
        }
 
        parser = Z_XMLPARSER_P(pind);
 
        bool status = php_xml_check_string_method_arg(2, parser->object, start_method_name, &start_fcc);
        if (status == false) {
            RETURN_THROWS();
        }
        status = php_xml_check_string_method_arg(3, parser->object, end_method_name, &end_fcc);
        if (status == false) {
            RETURN_THROWS();
        }
    } else {
        zval *dummy_start;
        zval *dummy_end;
 
        zend_release_fcall_info_cache(&start_fcc);
        zend_release_fcall_info_cache(&end_fcc);
        if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ozz", &pind, xml_parser_ce, &dummy_start, &dummy_end) == FAILURE) {
            RETURN_THROWS();
        } else {
            switch (Z_TYPE_P(dummy_start)) {
                case IS_NULL:
                case IS_STRING:
                    break;
                default:
                    zend_argument_type_error(2, "must be of type callable|string|null");
                    RETURN_THROWS();
            }
            zend_argument_type_error(3, "must be of type callable|string|null");
            RETURN_THROWS();
        }
    }
 
    set_handlers:
    xml_set_handler(&parser->startElementHandler, &start_fcc);
    xml_set_handler(&parser->endElementHandler, &end_fcc);
    XML_SetElementHandler(parser->parser, xml_startElementHandler, xml_endElementHandler);
 
    RETURN_TRUE;
}
/* }}} */
 
static void php_xml_set_handler_parse_callable(
    INTERNAL_FUNCTION_PARAMETERS,
    xml_parser **const parser,
    zend_fcall_info_cache *const parser_handler_fcc
) {
    zval *pind;
    zend_fcall_info handler_fci = {0};
    zend_fcall_info_cache handler_fcc = {0};
    zend_string *method_name = NULL;
 
    if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OF!", &pind, xml_parser_ce, &handler_fci, &handler_fcc) == SUCCESS) {
        *parser = Z_XMLPARSER_P(pind);
        if (!ZEND_FCI_INITIALIZED(handler_fci)) {
            /* Free handler, so just return and an uninitialized FCC communicates this */
            return;
        }
        memcpy(parser_handler_fcc, &handler_fcc, sizeof(zend_fcall_info_cache));
    } else if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS(), "OS", &pind, xml_parser_ce, &method_name) == SUCCESS) {
        *parser = Z_XMLPARSER_P(pind);
        php_error_docref(NULL, E_DEPRECATED, "Passing non-callable strings is deprecated since 8.4");
        if (UNEXPECTED(EG(exception))) {
            RETURN_THROWS();
        }
        bool status = php_xml_check_string_method_arg(2, (*parser)->object, method_name, parser_handler_fcc);
        if (status == false) {
            RETURN_THROWS();
        }
    } else {
        zval *dummy;
        if (zend_parse_parameters(ZEND_NUM_ARGS(), "Oz", &pind, xml_parser_ce, &dummy) == FAILURE) {
            RETURN_THROWS();
        }
        zend_argument_type_error(2, "must be of type callable|string|null");
        RETURN_THROWS();
    }
}
 
#define XML_SET_HANDLER_PHP_FUNCTION(function_name, parser_handler_name, parse_function, c_function) \
    PHP_FUNCTION(function_name) \
    { \
        xml_parser *parser = NULL; \
        zend_fcall_info_cache handler_fcc = {0}; \
        php_xml_set_handler_parse_callable(INTERNAL_FUNCTION_PARAM_PASSTHRU, &parser, &handler_fcc); \
        if (EG(exception)) { return; } \
        ZEND_ASSERT(parser); \
        xml_set_handler(&parser->parser_handler_name, &handler_fcc); \
        parse_function(parser->parser, c_function); \
        RETURN_TRUE; \
    }
 
XML_SET_HANDLER_PHP_FUNCTION(xml_set_character_data_handler, characterDataHandler, XML_SetCharacterDataHandler, xml_characterDataHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_processing_instruction_handler, processingInstructionHandler, XML_SetProcessingInstructionHandler, xml_processingInstructionHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_default_handler, defaultHandler, XML_SetDefaultHandler, xml_defaultHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_unparsed_entity_decl_handler, unparsedEntityDeclHandler, XML_SetUnparsedEntityDeclHandler, xml_unparsedEntityDeclHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_notation_decl_handler, notationDeclHandler, XML_SetNotationDeclHandler, xml_notationDeclHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_external_entity_ref_handler, externalEntityRefHandler, XML_SetExternalEntityRefHandler, xml_externalEntityRefHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_start_namespace_decl_handler, startNamespaceDeclHandler, XML_SetStartNamespaceDeclHandler, xml_startNamespaceDeclHandler);
XML_SET_HANDLER_PHP_FUNCTION(xml_set_end_namespace_decl_handler, endNamespaceDeclHandler, XML_SetEndNamespaceDeclHandler, xml_endNamespaceDeclHandler);
 
/* {{{ Start parsing an XML document */
PHP_FUNCTION(xml_parse)
{
    xml_parser *parser;
    zval *pind;
    char *data;
    size_t data_len;
    bool isFinal = 0;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "Os|b", &pind, xml_parser_ce, &data, &data_len, &isFinal) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    if (parser->isparsing) {
        zend_throw_error(NULL, "Parser must not be called recursively");
        RETURN_THROWS();
    }
    RETURN_LONG(xml_parse_helper(parser, data, data_len, isFinal));
}
 
/* }}} */
 
/* {{{ Parsing a XML document */
PHP_FUNCTION(xml_parse_into_struct)
{
    xml_parser *parser;
    zval *pind, *xdata, *info = NULL;
    char *data;
    size_t data_len;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "Osz|z", &pind, xml_parser_ce, &data, &data_len, &xdata, &info) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
 
    if (parser->isparsing) {
        php_error_docref(NULL, E_WARNING, "Parser must not be called recursively");
        RETURN_FALSE;
    }
 
    if (info) {
        if (!zend_try_array_init(info)) {
            RETURN_THROWS();
        }
    }
 
    if (!zend_try_array_init(xdata)) {
        RETURN_THROWS();
    }
 
    zval_ptr_dtor(&parser->data);
    ZVAL_COPY(&parser->data, xdata);
 
    if (info) {
        zval_ptr_dtor(&parser->info);
        ZVAL_COPY(&parser->info, info);
    }
 
    parser->level = 0;
    xml_parser_free_ltags(parser);
    parser->ltags = safe_emalloc(XML_MAXLEVEL, sizeof(char *), 0);
    memset(parser->ltags, 0, XML_MAXLEVEL * sizeof(char *));
 
    XML_SetElementHandler(parser->parser, xml_startElementHandler, xml_endElementHandler);
    XML_SetCharacterDataHandler(parser->parser, xml_characterDataHandler);
 
    RETURN_LONG(xml_parse_helper(parser, data, data_len, true));
}
/* }}} */
 
/* {{{ Get XML parser error code */
PHP_FUNCTION(xml_get_error_code)
{
    xml_parser *parser;
    zval *pind;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &pind, xml_parser_ce) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    RETURN_LONG((zend_long)XML_GetErrorCode(parser->parser));
}
/* }}} */
 
/* {{{ Get XML parser error string */
PHP_FUNCTION(xml_error_string)
{
    zend_long code;
    char *str;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &code) == FAILURE) {
        RETURN_THROWS();
    }
 
    str = (char *)XML_ErrorString((int)code);
    if (str) {
        RETVAL_STRING(str);
    }
}
/* }}} */
 
/* {{{ Get current line number for an XML parser */
PHP_FUNCTION(xml_get_current_line_number)
{
    xml_parser *parser;
    zval *pind;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &pind, xml_parser_ce) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    RETVAL_LONG(XML_GetCurrentLineNumber(parser->parser));
}
/* }}} */
 
/* {{{ Get current column number for an XML parser */
PHP_FUNCTION(xml_get_current_column_number)
{
    xml_parser *parser;
    zval *pind;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &pind, xml_parser_ce) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    RETVAL_LONG(XML_GetCurrentColumnNumber(parser->parser));
}
/* }}} */
 
/* {{{ Get current byte index for an XML parser */
PHP_FUNCTION(xml_get_current_byte_index)
{
    xml_parser *parser;
    zval *pind;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &pind, xml_parser_ce) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    RETVAL_LONG(XML_GetCurrentByteIndex(parser->parser));
}
/* }}} */
 
/* {{{ Free an XML parser */
PHP_FUNCTION(xml_parser_free)
{
    zval *pind;
    xml_parser *parser;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "O", &pind, xml_parser_ce) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    if (parser->isparsing == 1) {
        php_error_docref(NULL, E_WARNING, "Parser cannot be freed while it is parsing");
        RETURN_FALSE;
    }
 
    RETURN_TRUE;
}
/* }}} */
 
/* {{{ Set options in an XML parser */
PHP_FUNCTION(xml_parser_set_option)
{
    xml_parser *parser;
    zval *pind;
    zend_long opt;
    zval *value;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "Olz", &pind, xml_parser_ce, &opt, &value) == FAILURE) {
        RETURN_THROWS();
    }
 
    if (Z_TYPE_P(value) != IS_FALSE && Z_TYPE_P(value) != IS_TRUE &&
        Z_TYPE_P(value) != IS_LONG && Z_TYPE_P(value) != IS_STRING) {
        php_error_docref(NULL, E_WARNING,
            "Argument #3 ($value) must be of type string|int|bool, %s given", zend_zval_type_name(value));
    }
 
    parser = Z_XMLPARSER_P(pind);
    switch (opt) {
        /* Boolean option */
        case PHP_XML_OPTION_CASE_FOLDING:
            parser->case_folding = zend_is_true(value);
            break;
        /* Boolean option */
        case PHP_XML_OPTION_SKIP_WHITE:
            parser->skipwhite = zend_is_true(value);
            break;
        /* Boolean option */
        case PHP_XML_OPTION_PARSE_HUGE:
            /* Prevent wreaking havock to the parser internals during parsing */
            if (UNEXPECTED(parser->isparsing)) {
                zend_throw_error(NULL, "Cannot change option XML_OPTION_PARSE_HUGE while parsing");
                RETURN_THROWS();
            }
            parser->parsehuge = zend_is_true(value);
            break;
        /* Integer option */
        case PHP_XML_OPTION_SKIP_TAGSTART: {
            /* The tag start offset is stored in an int */
            /* TODO Improve handling of values? */
            zend_long value_long = zval_get_long(value);
            if (value_long < 0 || value_long > INT_MAX) {
                /* TODO Promote to ValueError in PHP 9.0 */
                php_error_docref(NULL, E_WARNING, "Argument #3 ($value) must be between 0 and %d"
                                                  " for option XML_OPTION_SKIP_TAGSTART", INT_MAX);
                RETURN_FALSE;
            }
            parser->toffset = (int) value_long;
            break;
        }
        /* String option */
        case PHP_XML_OPTION_TARGET_ENCODING: {
            const xml_encoding *enc;
            if (!try_convert_to_string(value)) {
                RETURN_THROWS();
            }
 
            enc = xml_get_encoding((XML_Char*)Z_STRVAL_P(value));
            if (enc == NULL) {
                zend_argument_value_error(3, "is not a supported target encoding");
                RETURN_THROWS();
            }
 
            parser->target_encoding = enc->name;
            break;
        }
        default:
            zend_argument_value_error(2, "must be a XML_OPTION_* constant");
            RETURN_THROWS();
            break;
    }
 
    RETURN_TRUE;
}
/* }}} */
 
/* {{{ Get options from an XML parser */
PHP_FUNCTION(xml_parser_get_option)
{
    xml_parser *parser;
    zval *pind;
    zend_long opt;
 
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "Ol", &pind, xml_parser_ce, &opt) == FAILURE) {
        RETURN_THROWS();
    }
 
    parser = Z_XMLPARSER_P(pind);
    switch (opt) {
        case PHP_XML_OPTION_CASE_FOLDING:
            RETURN_BOOL(parser->case_folding);
            break;
        case PHP_XML_OPTION_SKIP_TAGSTART:
            RETURN_LONG(parser->toffset);
            break;
        case PHP_XML_OPTION_SKIP_WHITE:
            RETURN_BOOL(parser->skipwhite);
            break;
        case PHP_XML_OPTION_PARSE_HUGE:
            RETURN_BOOL(parser->parsehuge);
            break;
        case PHP_XML_OPTION_TARGET_ENCODING:
            RETURN_STRING((char *)parser->target_encoding);
            break;
        default:
            zend_argument_value_error(2, "must be a XML_OPTION_* constant");
            RETURN_THROWS();
    }
}
/* }}} */
 
#endif