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 /*
                             __  __            _
                          ___\ \/ /_ __   __ _| |_
                         / _ \\  /| '_ \ / _` | __|
                        |  __//  \| |_) | (_| | |_
                         \___/_/\_\ .__/ \__,_|\__|
                                  |_| XML parser
 
    Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
    Copyright (c) 2000      Clark Cooper <coopercc@users.sourceforge.net>
    Copyright (c) 2000-2005 Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
    Copyright (c) 2001-2002 Greg Stein <gstein@users.sourceforge.net>
    Copyright (c) 2002-2016 Karl Waclawek <karl@waclawek.net>
    Copyright (c) 2016-2024 Sebastian Pipping <sebastian@pipping.org>
    Copyright (c) 2016      Cristian Rodríguez <crrodriguez@opensuse.org>
    Copyright (c) 2016      Thomas Beutlich <tc@tbeu.de>
    Copyright (c) 2017      Rhodri James <rhodri@wildebeest.org.uk>
    Copyright (c) 2022      Thijs Schreijer <thijs@thijsschreijer.nl>
    Copyright (c) 2023      Hanno Böck <hanno@gentoo.org>
    Copyright (c) 2023      Sony Corporation / Snild Dolkow <snild@sony.com>
    Copyright (c) 2024      Taichi Haradaguchi <20001722@ymail.ne.jp>
    Licensed under the MIT license:
 
    Permission is  hereby granted,  free of charge,  to any  person obtaining
    a  copy  of  this  software   and  associated  documentation  files  (the
    "Software"),  to  deal in  the  Software  without restriction,  including
    without  limitation the  rights  to use,  copy,  modify, merge,  publish,
    distribute, sublicense, and/or sell copies of the Software, and to permit
    persons  to whom  the Software  is  furnished to  do so,  subject to  the
    following conditions:
 
    The above copyright  notice and this permission notice  shall be included
    in all copies or substantial portions of the Software.
 
    THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
    EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
    NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
    DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
    OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
    USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
 #ifndef Expat_INCLUDED
 #define Expat_INCLUDED 1
 
 #include <stdlib.h>
 #include "expat_external.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 struct XML_ParserStruct;
 typedef struct XML_ParserStruct *XML_Parser;
 
 typedef unsigned char XML_Bool;
 #define XML_TRUE ((XML_Bool)1)
 #define XML_FALSE ((XML_Bool)0)
 
 /* The XML_Status enum gives the possible return values for several
    API functions.  The preprocessor #defines are included so this
    stanza can be added to code that still needs to support older
    versions of Expat 1.95.x:
 
    #ifndef XML_STATUS_OK
    #define XML_STATUS_OK    1
    #define XML_STATUS_ERROR 0
    #endif
 
    Otherwise, the #define hackery is quite ugly and would have been
    dropped.
 */
 enum XML_Status {
   XML_STATUS_ERROR = 0,
 #define XML_STATUS_ERROR XML_STATUS_ERROR
   XML_STATUS_OK = 1,
 #define XML_STATUS_OK XML_STATUS_OK
   XML_STATUS_SUSPENDED = 2
 #define XML_STATUS_SUSPENDED XML_STATUS_SUSPENDED
 };
 
 enum XML_Error {
   XML_ERROR_NONE,
   XML_ERROR_NO_MEMORY,
   XML_ERROR_SYNTAX,
   XML_ERROR_NO_ELEMENTS,
   XML_ERROR_INVALID_TOKEN,
   XML_ERROR_UNCLOSED_TOKEN,
   XML_ERROR_PARTIAL_CHAR,
   XML_ERROR_TAG_MISMATCH,
   XML_ERROR_DUPLICATE_ATTRIBUTE,
   XML_ERROR_JUNK_AFTER_DOC_ELEMENT,
   XML_ERROR_PARAM_ENTITY_REF,
   XML_ERROR_UNDEFINED_ENTITY,
   XML_ERROR_RECURSIVE_ENTITY_REF,
   XML_ERROR_ASYNC_ENTITY,
   XML_ERROR_BAD_CHAR_REF,
   XML_ERROR_BINARY_ENTITY_REF,
   XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF,
   XML_ERROR_MISPLACED_XML_PI,
   XML_ERROR_UNKNOWN_ENCODING,
   XML_ERROR_INCORRECT_ENCODING,
   XML_ERROR_UNCLOSED_CDATA_SECTION,
   XML_ERROR_EXTERNAL_ENTITY_HANDLING,
   XML_ERROR_NOT_STANDALONE,
   XML_ERROR_UNEXPECTED_STATE,
   XML_ERROR_ENTITY_DECLARED_IN_PE,
   XML_ERROR_FEATURE_REQUIRES_XML_DTD,
   XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING,
   /* Added in 1.95.7. */
   XML_ERROR_UNBOUND_PREFIX,
   /* Added in 1.95.8. */
   XML_ERROR_UNDECLARING_PREFIX,
   XML_ERROR_INCOMPLETE_PE,
   XML_ERROR_XML_DECL,
   XML_ERROR_TEXT_DECL,
   XML_ERROR_PUBLICID,
   XML_ERROR_SUSPENDED,
   XML_ERROR_NOT_SUSPENDED,
   XML_ERROR_ABORTED,
   XML_ERROR_FINISHED,
   XML_ERROR_SUSPEND_PE,
   /* Added in 2.0. */
   XML_ERROR_RESERVED_PREFIX_XML,
   XML_ERROR_RESERVED_PREFIX_XMLNS,
   XML_ERROR_RESERVED_NAMESPACE_URI,
   /* Added in 2.2.1. */
   XML_ERROR_INVALID_ARGUMENT,
   /* Added in 2.3.0. */
   XML_ERROR_NO_BUFFER,
   /* Added in 2.4.0. */
   XML_ERROR_AMPLIFICATION_LIMIT_BREACH,
   /* Added in 2.6.4. */
   XML_ERROR_NOT_STARTED,
 };
 
 enum XML_Content_Type {
   XML_CTYPE_EMPTY = 1,
   XML_CTYPE_ANY,
   XML_CTYPE_MIXED,
   XML_CTYPE_NAME,
   XML_CTYPE_CHOICE,
   XML_CTYPE_SEQ
 };
 
 enum XML_Content_Quant {
   XML_CQUANT_NONE,
   XML_CQUANT_OPT,
   XML_CQUANT_REP,
   XML_CQUANT_PLUS
 };
 
 /* If type == XML_CTYPE_EMPTY or XML_CTYPE_ANY, then quant will be
    XML_CQUANT_NONE, and the other fields will be zero or NULL.
    If type == XML_CTYPE_MIXED, then quant will be NONE or REP and
    numchildren will contain number of elements that may be mixed in
    and children point to an array of XML_Content cells that will be
    all of XML_CTYPE_NAME type with no quantification.
 
    If type == XML_CTYPE_NAME, then the name points to the name, and
    the numchildren field will be zero and children will be NULL. The
    quant fields indicates any quantifiers placed on the name.
 
    CHOICE and SEQ will have name NULL, the number of children in
    numchildren and children will point, recursively, to an array
    of XML_Content cells.
 
    The EMPTY, ANY, and MIXED types will only occur at top level.
 */
 
 typedef struct XML_cp XML_Content;
 
 struct XML_cp {
   enum XML_Content_Type type;
   enum XML_Content_Quant quant;
   XML_Char *name;
   unsigned int numchildren;
   XML_Content *children;
 };
 
 /* This is called for an element declaration. See above for
    description of the model argument. It's the user code's responsibility
    to free model when finished with it. See XML_FreeContentModel.
    There is no need to free the model from the handler, it can be kept
    around and freed at a later stage.
 */
 typedef void(XMLCALL *XML_ElementDeclHandler)(void *userData,
                                               const XML_Char *name,
                                               XML_Content *model);
 
 XMLPARSEAPI(void)
 XML_SetElementDeclHandler(XML_Parser parser, XML_ElementDeclHandler eldecl);
 
 /* The Attlist declaration handler is called for *each* attribute. So
    a single Attlist declaration with multiple attributes declared will
    generate multiple calls to this handler. The "default" parameter
    may be NULL in the case of the "#IMPLIED" or "#REQUIRED"
    keyword. The "isrequired" parameter will be true and the default
    value will be NULL in the case of "#REQUIRED". If "isrequired" is
    true and default is non-NULL, then this is a "#FIXED" default.
 */
 typedef void(XMLCALL *XML_AttlistDeclHandler)(
     void *userData, const XML_Char *elname, const XML_Char *attname,
     const XML_Char *att_type, const XML_Char *dflt, int isrequired);
 
 XMLPARSEAPI(void)
 XML_SetAttlistDeclHandler(XML_Parser parser, XML_AttlistDeclHandler attdecl);
 
 /* The XML declaration handler is called for *both* XML declarations
    and text declarations. The way to distinguish is that the version
    parameter will be NULL for text declarations. The encoding
    parameter may be NULL for XML declarations. The standalone
    parameter will be -1, 0, or 1 indicating respectively that there
    was no standalone parameter in the declaration, that it was given
    as no, or that it was given as yes.
 */
 typedef void(XMLCALL *XML_XmlDeclHandler)(void *userData,
                                           const XML_Char *version,
                                           const XML_Char *encoding,
                                           int standalone);
 
 XMLPARSEAPI(void)
 XML_SetXmlDeclHandler(XML_Parser parser, XML_XmlDeclHandler xmldecl);
 
 typedef struct {
   void *(*malloc_fcn)(size_t size);
   void *(*realloc_fcn)(void *ptr, size_t size);
   void (*free_fcn)(void *ptr);
 } XML_Memory_Handling_Suite;
 
 /* Constructs a new parser; encoding is the encoding specified by the
    external protocol or NULL if there is none specified.
 */
 XMLPARSEAPI(XML_Parser)
 XML_ParserCreate(const XML_Char *encoding);
 
 /* Constructs a new parser and namespace processor.  Element type
    names and attribute names that belong to a namespace will be
    expanded; unprefixed attribute names are never expanded; unprefixed
    element type names are expanded only if there is a default
    namespace. The expanded name is the concatenation of the namespace
    URI, the namespace separator character, and the local part of the
    name.  If the namespace separator is '\0' then the namespace URI
    and the local part will be concatenated without any separator.
    It is a programming error to use the separator '\0' with namespace
    triplets (see XML_SetReturnNSTriplet).
    If a namespace separator is chosen that can be part of a URI or
    part of an XML name, splitting an expanded name back into its
    1, 2 or 3 original parts on application level in the element handler
    may end up vulnerable, so these are advised against;  sane choices for
    a namespace separator are e.g. '\n' (line feed) and '|' (pipe).
 
    Note that Expat does not validate namespace URIs (beyond encoding)
    against RFC 3986 today (and is not required to do so with regard to
    the XML 1.0 namespaces specification) but it may start doing that
    in future releases.  Before that, an application using Expat must
    be ready to receive namespace URIs containing non-URI characters.
 */
 XMLPARSEAPI(XML_Parser)
 XML_ParserCreateNS(const XML_Char *encoding, XML_Char namespaceSeparator);
 
 /* Constructs a new parser using the memory management suite referred to
    by memsuite. If memsuite is NULL, then use the standard library memory
    suite. If namespaceSeparator is non-NULL it creates a parser with
    namespace processing as described above. The character pointed at
    will serve as the namespace separator.
 
    All further memory operations used for the created parser will come from
    the given suite.
 */
 XMLPARSEAPI(XML_Parser)
 XML_ParserCreate_MM(const XML_Char *encoding,
                     const XML_Memory_Handling_Suite *memsuite,
                     const XML_Char *namespaceSeparator);
 
 /* Prepare a parser object to be reused.  This is particularly
    valuable when memory allocation overhead is disproportionately high,
    such as when a large number of small documnents need to be parsed.
    All handlers are cleared from the parser, except for the
    unknownEncodingHandler. The parser's external state is re-initialized
    except for the values of ns and ns_triplets.
 
    Added in Expat 1.95.3.
 */
 XMLPARSEAPI(XML_Bool)
 XML_ParserReset(XML_Parser parser, const XML_Char *encoding);
 
 /* atts is array of name/value pairs, terminated by 0;
    names and values are 0 terminated.
 */
 typedef void(XMLCALL *XML_StartElementHandler)(void *userData,
                                                const XML_Char *name,
                                                const XML_Char **atts);
 
 typedef void(XMLCALL *XML_EndElementHandler)(void *userData,
                                              const XML_Char *name);
 
 /* s is not 0 terminated. */
 typedef void(XMLCALL *XML_CharacterDataHandler)(void *userData,
                                                 const XML_Char *s, int len);
 
 /* target and data are 0 terminated */
 typedef void(XMLCALL *XML_ProcessingInstructionHandler)(void *userData,
                                                         const XML_Char *target,
                                                         const XML_Char *data);
 
 /* data is 0 terminated */
 typedef void(XMLCALL *XML_CommentHandler)(void *userData, const XML_Char *data);
 
 typedef void(XMLCALL *XML_StartCdataSectionHandler)(void *userData);
 typedef void(XMLCALL *XML_EndCdataSectionHandler)(void *userData);
 
 /* This is called for any characters in the XML document for which
    there is no applicable handler.  This includes both characters that
    are part of markup which is of a kind that is not reported
    (comments, markup declarations), or characters that are part of a
    construct which could be reported but for which no handler has been
    supplied. The characters are passed exactly as they were in the XML
    document except that they will be encoded in UTF-8 or UTF-16.
    Line boundaries are not normalized. Note that a byte order mark
    character is not passed to the default handler. There are no
    guarantees about how characters are divided between calls to the
    default handler: for example, a comment might be split between
    multiple calls.
 */
 typedef void(XMLCALL *XML_DefaultHandler)(void *userData, const XML_Char *s,
                                           int len);
 
 /* This is called for the start of the DOCTYPE declaration, before
    any DTD or internal subset is parsed.
 */
 typedef void(XMLCALL *XML_StartDoctypeDeclHandler)(void *userData,
                                                    const XML_Char *doctypeName,
                                                    const XML_Char *sysid,
                                                    const XML_Char *pubid,
                                                    int has_internal_subset);
 
 /* This is called for the end of the DOCTYPE declaration when the
    closing > is encountered, but after processing any external
    subset.
 */
 typedef void(XMLCALL *XML_EndDoctypeDeclHandler)(void *userData);
 
 /* This is called for entity declarations. The is_parameter_entity
    argument will be non-zero if the entity is a parameter entity, zero
    otherwise.
 
    For internal entities (<!ENTITY foo "bar">), value will
    be non-NULL and systemId, publicID, and notationName will be NULL.
    The value string is NOT null-terminated; the length is provided in
    the value_length argument. Since it is legal to have zero-length
    values, do not use this argument to test for internal entities.
 
    For external entities, value will be NULL and systemId will be
    non-NULL. The publicId argument will be NULL unless a public
    identifier was provided. The notationName argument will have a
    non-NULL value only for unparsed entity declarations.
 
    Note that is_parameter_entity can't be changed to XML_Bool, since
    that would break binary compatibility.
 */
 typedef void(XMLCALL *XML_EntityDeclHandler)(
     void *userData, const XML_Char *entityName, int is_parameter_entity,
     const XML_Char *value, int value_length, const XML_Char *base,
     const XML_Char *systemId, const XML_Char *publicId,
     const XML_Char *notationName);
 
 XMLPARSEAPI(void)
 XML_SetEntityDeclHandler(XML_Parser parser, XML_EntityDeclHandler handler);
 
 /* OBSOLETE -- OBSOLETE -- OBSOLETE
    This handler has been superseded by the EntityDeclHandler above.
    It is provided here for backward compatibility.
 
    This is called for a declaration of an unparsed (NDATA) entity.
    The base argument is whatever was set by XML_SetBase. The
    entityName, systemId and notationName arguments will never be
    NULL. The other arguments may be.
 */
 typedef void(XMLCALL *XML_UnparsedEntityDeclHandler)(
     void *userData, const XML_Char *entityName, const XML_Char *base,
     const XML_Char *systemId, const XML_Char *publicId,
     const XML_Char *notationName);
 
 /* This is called for a declaration of notation.  The base argument is
    whatever was set by XML_SetBase. The notationName will never be
    NULL.  The other arguments can be.
 */
 typedef void(XMLCALL *XML_NotationDeclHandler)(void *userData,
                                                const XML_Char *notationName,
                                                const XML_Char *base,
                                                const XML_Char *systemId,
                                                const XML_Char *publicId);
 
 /* When namespace processing is enabled, these are called once for
    each namespace declaration. The call to the start and end element
    handlers occur between the calls to the start and end namespace
    declaration handlers. For an xmlns attribute, prefix will be
    NULL.  For an xmlns="" attribute, uri will be NULL.
 */
 typedef void(XMLCALL *XML_StartNamespaceDeclHandler)(void *userData,
                                                      const XML_Char *prefix,
                                                      const XML_Char *uri);
 
 typedef void(XMLCALL *XML_EndNamespaceDeclHandler)(void *userData,
                                                    const XML_Char *prefix);
 
 /* This is called if the document is not standalone, that is, it has an
    external subset or a reference to a parameter entity, but does not
    have standalone="yes". If this handler returns XML_STATUS_ERROR,
    then processing will not continue, and the parser will return a
    XML_ERROR_NOT_STANDALONE error.
    If parameter entity parsing is enabled, then in addition to the
    conditions above this handler will only be called if the referenced
    entity was actually read.
 */
 typedef int(XMLCALL *XML_NotStandaloneHandler)(void *userData);
 
 /* This is called for a reference to an external parsed general
    entity.  The referenced entity is not automatically parsed.  The
    application can parse it immediately or later using
    XML_ExternalEntityParserCreate.
 
    The parser argument is the parser parsing the entity containing the
    reference; it can be passed as the parser argument to
    XML_ExternalEntityParserCreate.  The systemId argument is the
    system identifier as specified in the entity declaration; it will
    not be NULL.
 
    The base argument is the system identifier that should be used as
    the base for resolving systemId if systemId was relative; this is
    set by XML_SetBase; it may be NULL.
 
    The publicId argument is the public identifier as specified in the
    entity declaration, or NULL if none was specified; the whitespace
    in the public identifier will have been normalized as required by
    the XML spec.
 
    The context argument specifies the parsing context in the format
    expected by the context argument to XML_ExternalEntityParserCreate;
    context is valid only until the handler returns, so if the
    referenced entity is to be parsed later, it must be copied.
    context is NULL only when the entity is a parameter entity.
 
    The handler should return XML_STATUS_ERROR if processing should not
    continue because of a fatal error in the handling of the external
    entity.  In this case the calling parser will return an
    XML_ERROR_EXTERNAL_ENTITY_HANDLING error.
 
    Note that unlike other handlers the first argument is the parser,
    not userData.
 */
 typedef int(XMLCALL *XML_ExternalEntityRefHandler)(XML_Parser parser,
                                                    const XML_Char *context,
                                                    const XML_Char *base,
                                                    const XML_Char *systemId,
                                                    const XML_Char *publicId);
 
 /* This is called in two situations:
    1) An entity reference is encountered for which no declaration
       has been read *and* this is not an error.
    2) An internal entity reference is read, but not expanded, because
       XML_SetDefaultHandler has been called.
    Note: skipped parameter entities in declarations and skipped general
          entities in attribute values cannot be reported, because
          the event would be out of sync with the reporting of the
          declarations or attribute values
 */
 typedef void(XMLCALL *XML_SkippedEntityHandler)(void *userData,
                                                 const XML_Char *entityName,
                                                 int is_parameter_entity);
 
 /* This structure is filled in by the XML_UnknownEncodingHandler to
    provide information to the parser about encodings that are unknown
    to the parser.
 
    The map[b] member gives information about byte sequences whose
    first byte is b.
 
    If map[b] is c where c is >= 0, then b by itself encodes the
    Unicode scalar value c.
 
    If map[b] is -1, then the byte sequence is malformed.
 
    If map[b] is -n, where n >= 2, then b is the first byte of an
    n-byte sequence that encodes a single Unicode scalar value.
 
    The data member will be passed as the first argument to the convert
    function.
 
    The convert function is used to convert multibyte sequences; s will
    point to a n-byte sequence where map[(unsigned char)*s] == -n.  The
    convert function must return the Unicode scalar value represented
    by this byte sequence or -1 if the byte sequence is malformed.
 
    The convert function may be NULL if the encoding is a single-byte
    encoding, that is if map[b] >= -1 for all bytes b.
 
    When the parser is finished with the encoding, then if release is
    not NULL, it will call release passing it the data member; once
    release has been called, the convert function will not be called
    again.
 
    Expat places certain restrictions on the encodings that are supported
    using this mechanism.
 
    1. Every ASCII character that can appear in a well-formed XML document,
       other than the characters
 
       $@\^`{}~
 
       must be represented by a single byte, and that byte must be the
       same byte that represents that character in ASCII.
 
    2. No character may require more than 4 bytes to encode.
 
    3. All characters encoded must have Unicode scalar values <=
       0xFFFF, (i.e., characters that would be encoded by surrogates in
       UTF-16 are  not allowed).  Note that this restriction doesn't
       apply to the built-in support for UTF-8 and UTF-16.
 
    4. No Unicode character may be encoded by more than one distinct
       sequence of bytes.
 */
 typedef struct {
   int map[256];
   void *data;
   int(XMLCALL *convert)(void *data, const char *s);
   void(XMLCALL *release)(void *data);
 } XML_Encoding;
 
 /* This is called for an encoding that is unknown to the parser.
 
    The encodingHandlerData argument is that which was passed as the
    second argument to XML_SetUnknownEncodingHandler.
 
    The name argument gives the name of the encoding as specified in
    the encoding declaration.
 
    If the callback can provide information about the encoding, it must
    fill in the XML_Encoding structure, and return XML_STATUS_OK.
    Otherwise it must return XML_STATUS_ERROR.
 
    If info does not describe a suitable encoding, then the parser will
    return an XML_ERROR_UNKNOWN_ENCODING error.
 */
 typedef int(XMLCALL *XML_UnknownEncodingHandler)(void *encodingHandlerData,
                                                  const XML_Char *name,
                                                  XML_Encoding *info);
 
 XMLPARSEAPI(void)
 XML_SetElementHandler(XML_Parser parser, XML_StartElementHandler start,
                       XML_EndElementHandler end);
 
 XMLPARSEAPI(void)
 XML_SetStartElementHandler(XML_Parser parser, XML_StartElementHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetEndElementHandler(XML_Parser parser, XML_EndElementHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetCharacterDataHandler(XML_Parser parser,
                             XML_CharacterDataHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetProcessingInstructionHandler(XML_Parser parser,
                                     XML_ProcessingInstructionHandler handler);
 XMLPARSEAPI(void)
 XML_SetCommentHandler(XML_Parser parser, XML_CommentHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetCdataSectionHandler(XML_Parser parser,
                            XML_StartCdataSectionHandler start,
                            XML_EndCdataSectionHandler end);
 
 XMLPARSEAPI(void)
 XML_SetStartCdataSectionHandler(XML_Parser parser,
                                 XML_StartCdataSectionHandler start);
 
 XMLPARSEAPI(void)
 XML_SetEndCdataSectionHandler(XML_Parser parser,
                               XML_EndCdataSectionHandler end);
 
 /* This sets the default handler and also inhibits expansion of
    internal entities. These entity references will be passed to the
    default handler, or to the skipped entity handler, if one is set.
 */
 XMLPARSEAPI(void)
 XML_SetDefaultHandler(XML_Parser parser, XML_DefaultHandler handler);
 
 /* This sets the default handler but does not inhibit expansion of
    internal entities.  The entity reference will not be passed to the
    default handler.
 */
 XMLPARSEAPI(void)
 XML_SetDefaultHandlerExpand(XML_Parser parser, XML_DefaultHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetDoctypeDeclHandler(XML_Parser parser, XML_StartDoctypeDeclHandler start,
                           XML_EndDoctypeDeclHandler end);
 
 XMLPARSEAPI(void)
 XML_SetStartDoctypeDeclHandler(XML_Parser parser,
                                XML_StartDoctypeDeclHandler start);
 
 XMLPARSEAPI(void)
 XML_SetEndDoctypeDeclHandler(XML_Parser parser, XML_EndDoctypeDeclHandler end);
 
 XMLPARSEAPI(void)
 XML_SetUnparsedEntityDeclHandler(XML_Parser parser,
                                  XML_UnparsedEntityDeclHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetNotationDeclHandler(XML_Parser parser, XML_NotationDeclHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetNamespaceDeclHandler(XML_Parser parser,
                             XML_StartNamespaceDeclHandler start,
                             XML_EndNamespaceDeclHandler end);
 
 XMLPARSEAPI(void)
 XML_SetStartNamespaceDeclHandler(XML_Parser parser,
                                  XML_StartNamespaceDeclHandler start);
 
 XMLPARSEAPI(void)
 XML_SetEndNamespaceDeclHandler(XML_Parser parser,
                                XML_EndNamespaceDeclHandler end);
 
 XMLPARSEAPI(void)
 XML_SetNotStandaloneHandler(XML_Parser parser,
                             XML_NotStandaloneHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetExternalEntityRefHandler(XML_Parser parser,
                                 XML_ExternalEntityRefHandler handler);
 
 /* If a non-NULL value for arg is specified here, then it will be
    passed as the first argument to the external entity ref handler
    instead of the parser object.
 */
 XMLPARSEAPI(void)
 XML_SetExternalEntityRefHandlerArg(XML_Parser parser, void *arg);
 
 XMLPARSEAPI(void)
 XML_SetSkippedEntityHandler(XML_Parser parser,
                             XML_SkippedEntityHandler handler);
 
 XMLPARSEAPI(void)
 XML_SetUnknownEncodingHandler(XML_Parser parser,
                               XML_UnknownEncodingHandler handler,
                               void *encodingHandlerData);
 
 /* This can be called within a handler for a start element, end
    element, processing instruction or character data.  It causes the
    corresponding markup to be passed to the default handler.
 */
 XMLPARSEAPI(void)
 XML_DefaultCurrent(XML_Parser parser);
 
 /* If do_nst is non-zero, and namespace processing is in effect, and
    a name has a prefix (i.e. an explicit namespace qualifier) then
    that name is returned as a triplet in a single string separated by
    the separator character specified when the parser was created: URI
    + sep + local_name + sep + prefix.
 
    If do_nst is zero, then namespace information is returned in the
    default manner (URI + sep + local_name) whether or not the name
    has a prefix.
 
    Note: Calling XML_SetReturnNSTriplet after XML_Parse or
      XML_ParseBuffer has no effect.
 */
 
 XMLPARSEAPI(void)
 XML_SetReturnNSTriplet(XML_Parser parser, int do_nst);
 
 /* This value is passed as the userData argument to callbacks. */
 XMLPARSEAPI(void)
 XML_SetUserData(XML_Parser parser, void *userData);
 
 /* Returns the last value set by XML_SetUserData or NULL. */
 #define XML_GetUserData(parser) (*(void **)(parser))
 
 /* This is equivalent to supplying an encoding argument to
    XML_ParserCreate. On success XML_SetEncoding returns non-zero,
    zero otherwise.
    Note: Calling XML_SetEncoding after XML_Parse or XML_ParseBuffer
      has no effect and returns XML_STATUS_ERROR.
 */
 XMLPARSEAPI(enum XML_Status)
 XML_SetEncoding(XML_Parser parser, const XML_Char *encoding);
 
 /* If this function is called, then the parser will be passed as the
    first argument to callbacks instead of userData.  The userData will
    still be accessible using XML_GetUserData.
 */
 XMLPARSEAPI(void)
 XML_UseParserAsHandlerArg(XML_Parser parser);
 
 /* If useDTD == XML_TRUE is passed to this function, then the parser
    will assume that there is an external subset, even if none is
    specified in the document. In such a case the parser will call the
    externalEntityRefHandler with a value of NULL for the systemId
    argument (the publicId and context arguments will be NULL as well).
    Note: For the purpose of checking WFC: Entity Declared, passing
      useDTD == XML_TRUE will make the parser behave as if the document
      had a DTD with an external subset.
    Note: If this function is called, then this must be done before
      the first call to XML_Parse or XML_ParseBuffer, since it will
      have no effect after that.  Returns
      XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING.
    Note: If the document does not have a DOCTYPE declaration at all,
      then startDoctypeDeclHandler and endDoctypeDeclHandler will not
      be called, despite an external subset being parsed.
    Note: If XML_DTD is not defined when Expat is compiled, returns
      XML_ERROR_FEATURE_REQUIRES_XML_DTD.
    Note: If parser == NULL, returns XML_ERROR_INVALID_ARGUMENT.
 */
 XMLPARSEAPI(enum XML_Error)
 XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD);
 
 /* Sets the base to be used for resolving relative URIs in system
    identifiers in declarations.  Resolving relative identifiers is
    left to the application: this value will be passed through as the
    base argument to the XML_ExternalEntityRefHandler,
    XML_NotationDeclHandler and XML_UnparsedEntityDeclHandler. The base
    argument will be copied.  Returns XML_STATUS_ERROR if out of memory,
    XML_STATUS_OK otherwise.
 */
 XMLPARSEAPI(enum XML_Status)
 XML_SetBase(XML_Parser parser, const XML_Char *base);
 
 XMLPARSEAPI(const XML_Char *)
 XML_GetBase(XML_Parser parser);
 
 /* Returns the number of the attribute/value pairs passed in last call
    to the XML_StartElementHandler that were specified in the start-tag
    rather than defaulted. Each attribute/value pair counts as 2; thus
    this corresponds to an index into the atts array passed to the
    XML_StartElementHandler.  Returns -1 if parser == NULL.
 */
 XMLPARSEAPI(int)
 XML_GetSpecifiedAttributeCount(XML_Parser parser);
 
 /* Returns the index of the ID attribute passed in the last call to
    XML_StartElementHandler, or -1 if there is no ID attribute or
    parser == NULL.  Each attribute/value pair counts as 2; thus this
    corresponds to an index into the atts array passed to the
    XML_StartElementHandler.
 */
 XMLPARSEAPI(int)
 XML_GetIdAttributeIndex(XML_Parser parser);
 
 #ifdef XML_ATTR_INFO
 /* Source file byte offsets for the start and end of attribute names and values.
    The value indices are exclusive of surrounding quotes; thus in a UTF-8 source
    file an attribute value of "blah" will yield:
    info->valueEnd - info->valueStart = 4 bytes.
 */
 typedef struct {
   XML_Index nameStart;  /* Offset to beginning of the attribute name. */
   XML_Index nameEnd;    /* Offset after the attribute name's last byte. */
   XML_Index valueStart; /* Offset to beginning of the attribute value. */
   XML_Index valueEnd;   /* Offset after the attribute value's last byte. */
 } XML_AttrInfo;
 
 /* Returns an array of XML_AttrInfo structures for the attribute/value pairs
    passed in last call to the XML_StartElementHandler that were specified
    in the start-tag rather than defaulted. Each attribute/value pair counts
    as 1; thus the number of entries in the array is
    XML_GetSpecifiedAttributeCount(parser) / 2.
 */
 XMLPARSEAPI(const XML_AttrInfo *)
 XML_GetAttributeInfo(XML_Parser parser);
 #endif
 
 /* Parses some input. Returns XML_STATUS_ERROR if a fatal error is
    detected.  The last call to XML_Parse must have isFinal true; len
    may be zero for this call (or any other).
 
    Though the return values for these functions has always been
    described as a Boolean value, the implementation, at least for the
    1.95.x series, has always returned exactly one of the XML_Status
    values.
 */
 XMLPARSEAPI(enum XML_Status)
 XML_Parse(XML_Parser parser, const char *s, int len, int isFinal);
 
 XMLPARSEAPI(void *)
 XML_GetBuffer(XML_Parser parser, int len);
 
 XMLPARSEAPI(enum XML_Status)
 XML_ParseBuffer(XML_Parser parser, int len, int isFinal);
 
 /* Stops parsing, causing XML_Parse() or XML_ParseBuffer() to return.
    Must be called from within a call-back handler, except when aborting
    (resumable = 0) an already suspended parser. Some call-backs may
    still follow because they would otherwise get lost. Examples:
    - endElementHandler() for empty elements when stopped in
      startElementHandler(),
    - endNameSpaceDeclHandler() when stopped in endElementHandler(),
    and possibly others.
 
    Can be called from most handlers, including DTD related call-backs,
    except when parsing an external parameter entity and resumable != 0.
    Returns XML_STATUS_OK when successful, XML_STATUS_ERROR otherwise.
    Possible error codes:
    - XML_ERROR_SUSPENDED: when suspending an already suspended parser.
    - XML_ERROR_FINISHED: when the parser has already finished.
    - XML_ERROR_SUSPEND_PE: when suspending while parsing an external PE.
 
    When resumable != 0 (true) then parsing is suspended, that is,
    XML_Parse() and XML_ParseBuffer() return XML_STATUS_SUSPENDED.
    Otherwise, parsing is aborted, that is, XML_Parse() and XML_ParseBuffer()
    return XML_STATUS_ERROR with error code XML_ERROR_ABORTED.
 
    *Note*:
    This will be applied to the current parser instance only, that is, if
    there is a parent parser then it will continue parsing when the
    externalEntityRefHandler() returns. It is up to the implementation of
    the externalEntityRefHandler() to call XML_StopParser() on the parent
    parser (recursively), if one wants to stop parsing altogether.
 
    When suspended, parsing can be resumed by calling XML_ResumeParser().
 */
 XMLPARSEAPI(enum XML_Status)
 XML_StopParser(XML_Parser parser, XML_Bool resumable);
 
 /* Resumes parsing after it has been suspended with XML_StopParser().
    Must not be called from within a handler call-back. Returns same
    status codes as XML_Parse() or XML_ParseBuffer().
    Additional error code XML_ERROR_NOT_SUSPENDED possible.
 
    *Note*:
    This must be called on the most deeply nested child parser instance
    first, and on its parent parser only after the child parser has finished,
    to be applied recursively until the document entity's parser is restarted.
    That is, the parent parser will not resume by itself and it is up to the
    application to call XML_ResumeParser() on it at the appropriate moment.
 */
 XMLPARSEAPI(enum XML_Status)
 XML_ResumeParser(XML_Parser parser);
 
 enum XML_Parsing { XML_INITIALIZED, XML_PARSING, XML_FINISHED, XML_SUSPENDED };
 
 typedef struct {
   enum XML_Parsing parsing;
   XML_Bool finalBuffer;
 } XML_ParsingStatus;
 
 /* Returns status of parser with respect to being initialized, parsing,
    finished, or suspended and processing the final buffer.
    XXX XML_Parse() and XML_ParseBuffer() should return XML_ParsingStatus,
    XXX with XML_FINISHED_OK or XML_FINISHED_ERROR replacing XML_FINISHED
 */
 XMLPARSEAPI(void)
 XML_GetParsingStatus(XML_Parser parser, XML_ParsingStatus *status);
 
 /* Creates an XML_Parser object that can parse an external general
    entity; context is a '\0'-terminated string specifying the parse
    context; encoding is a '\0'-terminated string giving the name of
    the externally specified encoding, or NULL if there is no
    externally specified encoding.  The context string consists of a
    sequence of tokens separated by formfeeds (\f); a token consisting
    of a name specifies that the general entity of the name is open; a
    token of the form prefix=uri specifies the namespace for a
    particular prefix; a token of the form =uri specifies the default
    namespace.  This can be called at any point after the first call to
    an ExternalEntityRefHandler so longer as the parser has not yet
    been freed.  The new parser is completely independent and may
    safely be used in a separate thread.  The handlers and userData are
    initialized from the parser argument.  Returns NULL if out of memory.
    Otherwise returns a new XML_Parser object.
 */
 XMLPARSEAPI(XML_Parser)
 XML_ExternalEntityParserCreate(XML_Parser parser, const XML_Char *context,
                                const XML_Char *encoding);
 
 enum XML_ParamEntityParsing {
   XML_PARAM_ENTITY_PARSING_NEVER,
   XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE,
   XML_PARAM_ENTITY_PARSING_ALWAYS
 };
 
 /* Controls parsing of parameter entities (including the external DTD
    subset). If parsing of parameter entities is enabled, then
    references to external parameter entities (including the external
    DTD subset) will be passed to the handler set with
    XML_SetExternalEntityRefHandler.  The context passed will be 0.
 
    Unlike external general entities, external parameter entities can
    only be parsed synchronously.  If the external parameter entity is
    to be parsed, it must be parsed during the call to the external
    entity ref handler: the complete sequence of
    XML_ExternalEntityParserCreate, XML_Parse/XML_ParseBuffer and
    XML_ParserFree calls must be made during this call.  After
    XML_ExternalEntityParserCreate has been called to create the parser
    for the external parameter entity (context must be 0 for this
    call), it is illegal to make any calls on the old parser until
    XML_ParserFree has been called on the newly created parser.
    If the library has been compiled without support for parameter
    entity parsing (ie without XML_DTD being defined), then
    XML_SetParamEntityParsing will return 0 if parsing of parameter
    entities is requested; otherwise it will return non-zero.
    Note: If XML_SetParamEntityParsing is called after XML_Parse or
       XML_ParseBuffer, then it has no effect and will always return 0.
    Note: If parser == NULL, the function will do nothing and return 0.
 */
 XMLPARSEAPI(int)
 XML_SetParamEntityParsing(XML_Parser parser,
                           enum XML_ParamEntityParsing parsing);
 
 /* Sets the hash salt to use for internal hash calculations.
    Helps in preventing DoS attacks based on predicting hash
    function behavior. This must be called before parsing is started.
    Returns 1 if successful, 0 when called after parsing has started.
    Note: If parser == NULL, the function will do nothing and return 0.
 */
 XMLPARSEAPI(int)
 XML_SetHashSalt(XML_Parser parser, unsigned long hash_salt);
 
 /* If XML_Parse or XML_ParseBuffer have returned XML_STATUS_ERROR, then
    XML_GetErrorCode returns information about the error.
 */
 XMLPARSEAPI(enum XML_Error)
 XML_GetErrorCode(XML_Parser parser);
 
 /* These functions return information about the current parse
    location.  They may be called from any callback called to report
    some parse event; in this case the location is the location of the
    first of the sequence of characters that generated the event.  When
    called from callbacks generated by declarations in the document
    prologue, the location identified isn't as neatly defined, but will
    be within the relevant markup.  When called outside of the callback
    functions, the position indicated will be just past the last parse
    event (regardless of whether there was an associated callback).
 
    They may also be called after returning from a call to XML_Parse
    or XML_ParseBuffer.  If the return value is XML_STATUS_ERROR then
    the location is the location of the character at which the error
    was detected; otherwise the location is the location of the last
    parse event, as described above.
 
    Note: XML_GetCurrentLineNumber and XML_GetCurrentColumnNumber
    return 0 to indicate an error.
    Note: XML_GetCurrentByteIndex returns -1 to indicate an error.
 */
 XMLPARSEAPI(XML_Size) XML_GetCurrentLineNumber(XML_Parser parser);
 XMLPARSEAPI(XML_Size) XML_GetCurrentColumnNumber(XML_Parser parser);
 XMLPARSEAPI(XML_Index) XML_GetCurrentByteIndex(XML_Parser parser);
 
 /* Return the number of bytes in the current event.
    Returns 0 if the event is in an internal entity.
 */
 XMLPARSEAPI(int)
 XML_GetCurrentByteCount(XML_Parser parser);
 
 /* If XML_CONTEXT_BYTES is >=1, returns the input buffer, sets
    the integer pointed to by offset to the offset within this buffer
    of the current parse position, and sets the integer pointed to by size
    to the size of this buffer (the number of input bytes). Otherwise
    returns a NULL pointer. Also returns a NULL pointer if a parse isn't
    active.
 
    NOTE: The character pointer returned should not be used outside
    the handler that makes the call.
 */
 XMLPARSEAPI(const char *)
 XML_GetInputContext(XML_Parser parser, int *offset, int *size);
 
 /* For backwards compatibility with previous versions. */
 #define XML_GetErrorLineNumber XML_GetCurrentLineNumber
 #define XML_GetErrorColumnNumber XML_GetCurrentColumnNumber
 #define XML_GetErrorByteIndex XML_GetCurrentByteIndex
 
 /* Frees the content model passed to the element declaration handler */
 XMLPARSEAPI(void)
 XML_FreeContentModel(XML_Parser parser, XML_Content *model);
 
 /* Exposing the memory handling functions used in Expat */
 XMLPARSEAPI(void *)
 XML_ATTR_MALLOC
 XML_ATTR_ALLOC_SIZE(2)
 XML_MemMalloc(XML_Parser parser, size_t size);
 
 XMLPARSEAPI(void *)
 XML_ATTR_ALLOC_SIZE(3)
 XML_MemRealloc(XML_Parser parser, void *ptr, size_t size);
 
 XMLPARSEAPI(void)
 XML_MemFree(XML_Parser parser, void *ptr);
 
 /* Frees memory used by the parser. */
 XMLPARSEAPI(void)
 XML_ParserFree(XML_Parser parser);
 
 /* Returns a string describing the error. */
 XMLPARSEAPI(const XML_LChar *)
 XML_ErrorString(enum XML_Error code);
 
 /* Return a string containing the version number of this expat */
 XMLPARSEAPI(const XML_LChar *)
 XML_ExpatVersion(void);
 
 typedef struct {
   int major;
   int minor;
   int micro;
 } XML_Expat_Version;
 
 /* Return an XML_Expat_Version structure containing numeric version
    number information for this version of expat.
 */
 XMLPARSEAPI(XML_Expat_Version)
 XML_ExpatVersionInfo(void);
 
 /* Added in Expat 1.95.5. */
 enum XML_FeatureEnum {
   XML_FEATURE_END = 0,
   XML_FEATURE_UNICODE,
   XML_FEATURE_UNICODE_WCHAR_T,
   XML_FEATURE_DTD,
   XML_FEATURE_CONTEXT_BYTES,
   XML_FEATURE_MIN_SIZE,
   XML_FEATURE_SIZEOF_XML_CHAR,
   XML_FEATURE_SIZEOF_XML_LCHAR,
   XML_FEATURE_NS,
   XML_FEATURE_LARGE_SIZE,
   XML_FEATURE_ATTR_INFO,
   /* Added in Expat 2.4.0. */
   XML_FEATURE_BILLION_LAUGHS_ATTACK_PROTECTION_MAXIMUM_AMPLIFICATION_DEFAULT,
   XML_FEATURE_BILLION_LAUGHS_ATTACK_PROTECTION_ACTIVATION_THRESHOLD_DEFAULT,
   /* Added in Expat 2.6.0. */
   XML_FEATURE_GE
   /* Additional features must be added to the end of this enum. */
 };
 
 typedef struct {
   enum XML_FeatureEnum feature;
   const XML_LChar *name;
   long int value;
 } XML_Feature;
 
 XMLPARSEAPI(const XML_Feature *)
 XML_GetFeatureList(void);
 
 #if defined(XML_DTD) || (defined(XML_GE) && XML_GE == 1)
 /* Added in Expat 2.4.0 for XML_DTD defined and
  * added in Expat 2.6.0 for XML_GE == 1. */
 XMLPARSEAPI(XML_Bool)
 XML_SetBillionLaughsAttackProtectionMaximumAmplification(
     XML_Parser parser, float maximumAmplificationFactor);
 
 /* Added in Expat 2.4.0 for XML_DTD defined and
  * added in Expat 2.6.0 for XML_GE == 1. */
 XMLPARSEAPI(XML_Bool)
 XML_SetBillionLaughsAttackProtectionActivationThreshold(
     XML_Parser parser, unsigned long long activationThresholdBytes);
 #endif
 
 /* Added in Expat 2.6.0. */
 XMLPARSEAPI(XML_Bool)
 XML_SetReparseDeferralEnabled(XML_Parser parser, XML_Bool enabled);
 
 /* Expat follows the semantic versioning convention.
    See https://semver.org
 */
 #define XML_MAJOR_VERSION 2
 #define XML_MINOR_VERSION 6
 #define XML_MICRO_VERSION 4
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* not Expat_INCLUDED */

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