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Geant4/externals/expat/include/expat.h

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  1 /*
  2                             __  __            _
  3                          ___\ \/ /_ __   __ _| |_
  4                         / _ \\  /| '_ \ / _` | __|
  5                        |  __//  \| |_) | (_| | |_
  6                         \___/_/\_\ .__/ \__,_|\__|
  7                                  |_| XML parser
  8 
  9    Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
 10    Copyright (c) 2000      Clark Cooper <coopercc@users.sourceforge.net>
 11    Copyright (c) 2000-2005 Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
 12    Copyright (c) 2001-2002 Greg Stein <gstein@users.sourceforge.net>
 13    Copyright (c) 2002-2016 Karl Waclawek <karl@waclawek.net>
 14    Copyright (c) 2016-2022 Sebastian Pipping <sebastian@pipping.org>
 15    Copyright (c) 2016      Cristian Rodríguez <crrodriguez@opensuse.org>
 16    Copyright (c) 2016      Thomas Beutlich <tc@tbeu.de>
 17    Copyright (c) 2017      Rhodri James <rhodri@wildebeest.org.uk>
 18    Copyright (c) 2022      Thijs Schreijer <thijs@thijsschreijer.nl>
 19    Licensed under the MIT license:
 20 
 21    Permission is  hereby granted,  free of charge,  to any  person obtaining
 22    a  copy  of  this  software   and  associated  documentation  files  (the
 23    "Software"),  to  deal in  the  Software  without restriction,  including
 24    without  limitation the  rights  to use,  copy,  modify, merge,  publish,
 25    distribute, sublicense, and/or sell copies of the Software, and to permit
 26    persons  to whom  the Software  is  furnished to  do so,  subject to  the
 27    following conditions:
 28 
 29    The above copyright  notice and this permission notice  shall be included
 30    in all copies or substantial portions of the Software.
 31 
 32    THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
 33    EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
 34    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 35    NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 36    DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
 37    OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 38    USE OR OTHER DEALINGS IN THE SOFTWARE.
 39 */
 40 
 41 #ifndef Expat_INCLUDED
 42 #define Expat_INCLUDED 1
 43 
 44 #include <stdlib.h>
 45 #include "expat_external.h"
 46 
 47 #ifdef __cplusplus
 48 extern "C" {
 49 #endif
 50 
 51 struct XML_ParserStruct;
 52 typedef struct XML_ParserStruct *XML_Parser;
 53 
 54 typedef unsigned char XML_Bool;
 55 #define XML_TRUE ((XML_Bool)1)
 56 #define XML_FALSE ((XML_Bool)0)
 57 
 58 /* The XML_Status enum gives the possible return values for several
 59    API functions.  The preprocessor #defines are included so this
 60    stanza can be added to code that still needs to support older
 61    versions of Expat 1.95.x:
 62 
 63    #ifndef XML_STATUS_OK
 64    #define XML_STATUS_OK    1
 65    #define XML_STATUS_ERROR 0
 66    #endif
 67 
 68    Otherwise, the #define hackery is quite ugly and would have been
 69    dropped.
 70 */
 71 enum XML_Status {
 72   XML_STATUS_ERROR = 0,
 73 #define XML_STATUS_ERROR XML_STATUS_ERROR
 74   XML_STATUS_OK = 1,
 75 #define XML_STATUS_OK XML_STATUS_OK
 76   XML_STATUS_SUSPENDED = 2
 77 #define XML_STATUS_SUSPENDED XML_STATUS_SUSPENDED
 78 };
 79 
 80 enum XML_Error {
 81   XML_ERROR_NONE,
 82   XML_ERROR_NO_MEMORY,
 83   XML_ERROR_SYNTAX,
 84   XML_ERROR_NO_ELEMENTS,
 85   XML_ERROR_INVALID_TOKEN,
 86   XML_ERROR_UNCLOSED_TOKEN,
 87   XML_ERROR_PARTIAL_CHAR,
 88   XML_ERROR_TAG_MISMATCH,
 89   XML_ERROR_DUPLICATE_ATTRIBUTE,
 90   XML_ERROR_JUNK_AFTER_DOC_ELEMENT,
 91   XML_ERROR_PARAM_ENTITY_REF,
 92   XML_ERROR_UNDEFINED_ENTITY,
 93   XML_ERROR_RECURSIVE_ENTITY_REF,
 94   XML_ERROR_ASYNC_ENTITY,
 95   XML_ERROR_BAD_CHAR_REF,
 96   XML_ERROR_BINARY_ENTITY_REF,
 97   XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF,
 98   XML_ERROR_MISPLACED_XML_PI,
 99   XML_ERROR_UNKNOWN_ENCODING,
100   XML_ERROR_INCORRECT_ENCODING,
101   XML_ERROR_UNCLOSED_CDATA_SECTION,
102   XML_ERROR_EXTERNAL_ENTITY_HANDLING,
103   XML_ERROR_NOT_STANDALONE,
104   XML_ERROR_UNEXPECTED_STATE,
105   XML_ERROR_ENTITY_DECLARED_IN_PE,
106   XML_ERROR_FEATURE_REQUIRES_XML_DTD,
107   XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING,
108   /* Added in 1.95.7. */
109   XML_ERROR_UNBOUND_PREFIX,
110   /* Added in 1.95.8. */
111   XML_ERROR_UNDECLARING_PREFIX,
112   XML_ERROR_INCOMPLETE_PE,
113   XML_ERROR_XML_DECL,
114   XML_ERROR_TEXT_DECL,
115   XML_ERROR_PUBLICID,
116   XML_ERROR_SUSPENDED,
117   XML_ERROR_NOT_SUSPENDED,
118   XML_ERROR_ABORTED,
119   XML_ERROR_FINISHED,
120   XML_ERROR_SUSPEND_PE,
121   /* Added in 2.0. */
122   XML_ERROR_RESERVED_PREFIX_XML,
123   XML_ERROR_RESERVED_PREFIX_XMLNS,
124   XML_ERROR_RESERVED_NAMESPACE_URI,
125   /* Added in 2.2.1. */
126   XML_ERROR_INVALID_ARGUMENT,
127   /* Added in 2.3.0. */
128   XML_ERROR_NO_BUFFER,
129   /* Added in 2.4.0. */
130   XML_ERROR_AMPLIFICATION_LIMIT_BREACH
131 };
132 
133 enum XML_Content_Type {
134   XML_CTYPE_EMPTY = 1,
135   XML_CTYPE_ANY,
136   XML_CTYPE_MIXED,
137   XML_CTYPE_NAME,
138   XML_CTYPE_CHOICE,
139   XML_CTYPE_SEQ
140 };
141 
142 enum XML_Content_Quant {
143   XML_CQUANT_NONE,
144   XML_CQUANT_OPT,
145   XML_CQUANT_REP,
146   XML_CQUANT_PLUS
147 };
148 
149 /* If type == XML_CTYPE_EMPTY or XML_CTYPE_ANY, then quant will be
150    XML_CQUANT_NONE, and the other fields will be zero or NULL.
151    If type == XML_CTYPE_MIXED, then quant will be NONE or REP and
152    numchildren will contain number of elements that may be mixed in
153    and children point to an array of XML_Content cells that will be
154    all of XML_CTYPE_NAME type with no quantification.
155 
156    If type == XML_CTYPE_NAME, then the name points to the name, and
157    the numchildren field will be zero and children will be NULL. The
158    quant fields indicates any quantifiers placed on the name.
159 
160    CHOICE and SEQ will have name NULL, the number of children in
161    numchildren and children will point, recursively, to an array
162    of XML_Content cells.
163 
164    The EMPTY, ANY, and MIXED types will only occur at top level.
165 */
166 
167 typedef struct XML_cp XML_Content;
168 
169 struct XML_cp {
170   enum XML_Content_Type type;
171   enum XML_Content_Quant quant;
172   XML_Char *name;
173   unsigned int numchildren;
174   XML_Content *children;
175 };
176 
177 /* This is called for an element declaration. See above for
178    description of the model argument. It's the user code's responsibility
179    to free model when finished with it. See XML_FreeContentModel.
180    There is no need to free the model from the handler, it can be kept
181    around and freed at a later stage.
182 */
183 typedef void(XMLCALL *XML_ElementDeclHandler)(void *userData,
184                                               const XML_Char *name,
185                                               XML_Content *model);
186 
187 XMLPARSEAPI(void)
188 XML_SetElementDeclHandler(XML_Parser parser, XML_ElementDeclHandler eldecl);
189 
190 /* The Attlist declaration handler is called for *each* attribute. So
191    a single Attlist declaration with multiple attributes declared will
192    generate multiple calls to this handler. The "default" parameter
193    may be NULL in the case of the "#IMPLIED" or "#REQUIRED"
194    keyword. The "isrequired" parameter will be true and the default
195    value will be NULL in the case of "#REQUIRED". If "isrequired" is
196    true and default is non-NULL, then this is a "#FIXED" default.
197 */
198 typedef void(XMLCALL *XML_AttlistDeclHandler)(
199     void *userData, const XML_Char *elname, const XML_Char *attname,
200     const XML_Char *att_type, const XML_Char *dflt, int isrequired);
201 
202 XMLPARSEAPI(void)
203 XML_SetAttlistDeclHandler(XML_Parser parser, XML_AttlistDeclHandler attdecl);
204 
205 /* The XML declaration handler is called for *both* XML declarations
206    and text declarations. The way to distinguish is that the version
207    parameter will be NULL for text declarations. The encoding
208    parameter may be NULL for XML declarations. The standalone
209    parameter will be -1, 0, or 1 indicating respectively that there
210    was no standalone parameter in the declaration, that it was given
211    as no, or that it was given as yes.
212 */
213 typedef void(XMLCALL *XML_XmlDeclHandler)(void *userData,
214                                           const XML_Char *version,
215                                           const XML_Char *encoding,
216                                           int standalone);
217 
218 XMLPARSEAPI(void)
219 XML_SetXmlDeclHandler(XML_Parser parser, XML_XmlDeclHandler xmldecl);
220 
221 typedef struct {
222   void *(*malloc_fcn)(size_t size);
223   void *(*realloc_fcn)(void *ptr, size_t size);
224   void (*free_fcn)(void *ptr);
225 } XML_Memory_Handling_Suite;
226 
227 /* Constructs a new parser; encoding is the encoding specified by the
228    external protocol or NULL if there is none specified.
229 */
230 XMLPARSEAPI(XML_Parser)
231 XML_ParserCreate(const XML_Char *encoding);
232 
233 /* Constructs a new parser and namespace processor.  Element type
234    names and attribute names that belong to a namespace will be
235    expanded; unprefixed attribute names are never expanded; unprefixed
236    element type names are expanded only if there is a default
237    namespace. The expanded name is the concatenation of the namespace
238    URI, the namespace separator character, and the local part of the
239    name.  If the namespace separator is '\0' then the namespace URI
240    and the local part will be concatenated without any separator.
241    It is a programming error to use the separator '\0' with namespace
242    triplets (see XML_SetReturnNSTriplet).
243    If a namespace separator is chosen that can be part of a URI or
244    part of an XML name, splitting an expanded name back into its
245    1, 2 or 3 original parts on application level in the element handler
246    may end up vulnerable, so these are advised against;  sane choices for
247    a namespace separator are e.g. '\n' (line feed) and '|' (pipe).
248 
249    Note that Expat does not validate namespace URIs (beyond encoding)
250    against RFC 3986 today (and is not required to do so with regard to
251    the XML 1.0 namespaces specification) but it may start doing that
252    in future releases.  Before that, an application using Expat must
253    be ready to receive namespace URIs containing non-URI characters.
254 */
255 XMLPARSEAPI(XML_Parser)
256 XML_ParserCreateNS(const XML_Char *encoding, XML_Char namespaceSeparator);
257 
258 /* Constructs a new parser using the memory management suite referred to
259    by memsuite. If memsuite is NULL, then use the standard library memory
260    suite. If namespaceSeparator is non-NULL it creates a parser with
261    namespace processing as described above. The character pointed at
262    will serve as the namespace separator.
263 
264    All further memory operations used for the created parser will come from
265    the given suite.
266 */
267 XMLPARSEAPI(XML_Parser)
268 XML_ParserCreate_MM(const XML_Char *encoding,
269                     const XML_Memory_Handling_Suite *memsuite,
270                     const XML_Char *namespaceSeparator);
271 
272 /* Prepare a parser object to be re-used.  This is particularly
273    valuable when memory allocation overhead is disproportionately high,
274    such as when a large number of small documnents need to be parsed.
275    All handlers are cleared from the parser, except for the
276    unknownEncodingHandler. The parser's external state is re-initialized
277    except for the values of ns and ns_triplets.
278 
279    Added in Expat 1.95.3.
280 */
281 XMLPARSEAPI(XML_Bool)
282 XML_ParserReset(XML_Parser parser, const XML_Char *encoding);
283 
284 /* atts is array of name/value pairs, terminated by 0;
285    names and values are 0 terminated.
286 */
287 typedef void(XMLCALL *XML_StartElementHandler)(void *userData,
288                                                const XML_Char *name,
289                                                const XML_Char **atts);
290 
291 typedef void(XMLCALL *XML_EndElementHandler)(void *userData,
292                                              const XML_Char *name);
293 
294 /* s is not 0 terminated. */
295 typedef void(XMLCALL *XML_CharacterDataHandler)(void *userData,
296                                                 const XML_Char *s, int len);
297 
298 /* target and data are 0 terminated */
299 typedef void(XMLCALL *XML_ProcessingInstructionHandler)(void *userData,
300                                                         const XML_Char *target,
301                                                         const XML_Char *data);
302 
303 /* data is 0 terminated */
304 typedef void(XMLCALL *XML_CommentHandler)(void *userData, const XML_Char *data);
305 
306 typedef void(XMLCALL *XML_StartCdataSectionHandler)(void *userData);
307 typedef void(XMLCALL *XML_EndCdataSectionHandler)(void *userData);
308 
309 /* This is called for any characters in the XML document for which
310    there is no applicable handler.  This includes both characters that
311    are part of markup which is of a kind that is not reported
312    (comments, markup declarations), or characters that are part of a
313    construct which could be reported but for which no handler has been
314    supplied. The characters are passed exactly as they were in the XML
315    document except that they will be encoded in UTF-8 or UTF-16.
316    Line boundaries are not normalized. Note that a byte order mark
317    character is not passed to the default handler. There are no
318    guarantees about how characters are divided between calls to the
319    default handler: for example, a comment might be split between
320    multiple calls.
321 */
322 typedef void(XMLCALL *XML_DefaultHandler)(void *userData, const XML_Char *s,
323                                           int len);
324 
325 /* This is called for the start of the DOCTYPE declaration, before
326    any DTD or internal subset is parsed.
327 */
328 typedef void(XMLCALL *XML_StartDoctypeDeclHandler)(void *userData,
329                                                    const XML_Char *doctypeName,
330                                                    const XML_Char *sysid,
331                                                    const XML_Char *pubid,
332                                                    int has_internal_subset);
333 
334 /* This is called for the end of the DOCTYPE declaration when the
335    closing > is encountered, but after processing any external
336    subset.
337 */
338 typedef void(XMLCALL *XML_EndDoctypeDeclHandler)(void *userData);
339 
340 /* This is called for entity declarations. The is_parameter_entity
341    argument will be non-zero if the entity is a parameter entity, zero
342    otherwise.
343 
344    For internal entities (<!ENTITY foo "bar">), value will
345    be non-NULL and systemId, publicID, and notationName will be NULL.
346    The value string is NOT null-terminated; the length is provided in
347    the value_length argument. Since it is legal to have zero-length
348    values, do not use this argument to test for internal entities.
349 
350    For external entities, value will be NULL and systemId will be
351    non-NULL. The publicId argument will be NULL unless a public
352    identifier was provided. The notationName argument will have a
353    non-NULL value only for unparsed entity declarations.
354 
355    Note that is_parameter_entity can't be changed to XML_Bool, since
356    that would break binary compatibility.
357 */
358 typedef void(XMLCALL *XML_EntityDeclHandler)(
359     void *userData, const XML_Char *entityName, int is_parameter_entity,
360     const XML_Char *value, int value_length, const XML_Char *base,
361     const XML_Char *systemId, const XML_Char *publicId,
362     const XML_Char *notationName);
363 
364 XMLPARSEAPI(void)
365 XML_SetEntityDeclHandler(XML_Parser parser, XML_EntityDeclHandler handler);
366 
367 /* OBSOLETE -- OBSOLETE -- OBSOLETE
368    This handler has been superseded by the EntityDeclHandler above.
369    It is provided here for backward compatibility.
370 
371    This is called for a declaration of an unparsed (NDATA) entity.
372    The base argument is whatever was set by XML_SetBase. The
373    entityName, systemId and notationName arguments will never be
374    NULL. The other arguments may be.
375 */
376 typedef void(XMLCALL *XML_UnparsedEntityDeclHandler)(
377     void *userData, const XML_Char *entityName, const XML_Char *base,
378     const XML_Char *systemId, const XML_Char *publicId,
379     const XML_Char *notationName);
380 
381 /* This is called for a declaration of notation.  The base argument is
382    whatever was set by XML_SetBase. The notationName will never be
383    NULL.  The other arguments can be.
384 */
385 typedef void(XMLCALL *XML_NotationDeclHandler)(void *userData,
386                                                const XML_Char *notationName,
387                                                const XML_Char *base,
388                                                const XML_Char *systemId,
389                                                const XML_Char *publicId);
390 
391 /* When namespace processing is enabled, these are called once for
392    each namespace declaration. The call to the start and end element
393    handlers occur between the calls to the start and end namespace
394    declaration handlers. For an xmlns attribute, prefix will be
395    NULL.  For an xmlns="" attribute, uri will be NULL.
396 */
397 typedef void(XMLCALL *XML_StartNamespaceDeclHandler)(void *userData,
398                                                      const XML_Char *prefix,
399                                                      const XML_Char *uri);
400 
401 typedef void(XMLCALL *XML_EndNamespaceDeclHandler)(void *userData,
402                                                    const XML_Char *prefix);
403 
404 /* This is called if the document is not standalone, that is, it has an
405    external subset or a reference to a parameter entity, but does not
406    have standalone="yes". If this handler returns XML_STATUS_ERROR,
407    then processing will not continue, and the parser will return a
408    XML_ERROR_NOT_STANDALONE error.
409    If parameter entity parsing is enabled, then in addition to the
410    conditions above this handler will only be called if the referenced
411    entity was actually read.
412 */
413 typedef int(XMLCALL *XML_NotStandaloneHandler)(void *userData);
414 
415 /* This is called for a reference to an external parsed general
416    entity.  The referenced entity is not automatically parsed.  The
417    application can parse it immediately or later using
418    XML_ExternalEntityParserCreate.
419 
420    The parser argument is the parser parsing the entity containing the
421    reference; it can be passed as the parser argument to
422    XML_ExternalEntityParserCreate.  The systemId argument is the
423    system identifier as specified in the entity declaration; it will
424    not be NULL.
425 
426    The base argument is the system identifier that should be used as
427    the base for resolving systemId if systemId was relative; this is
428    set by XML_SetBase; it may be NULL.
429 
430    The publicId argument is the public identifier as specified in the
431    entity declaration, or NULL if none was specified; the whitespace
432    in the public identifier will have been normalized as required by
433    the XML spec.
434 
435    The context argument specifies the parsing context in the format
436    expected by the context argument to XML_ExternalEntityParserCreate;
437    context is valid only until the handler returns, so if the
438    referenced entity is to be parsed later, it must be copied.
439    context is NULL only when the entity is a parameter entity.
440 
441    The handler should return XML_STATUS_ERROR if processing should not
442    continue because of a fatal error in the handling of the external
443    entity.  In this case the calling parser will return an
444    XML_ERROR_EXTERNAL_ENTITY_HANDLING error.
445 
446    Note that unlike other handlers the first argument is the parser,
447    not userData.
448 */
449 typedef int(XMLCALL *XML_ExternalEntityRefHandler)(XML_Parser parser,
450                                                    const XML_Char *context,
451                                                    const XML_Char *base,
452                                                    const XML_Char *systemId,
453                                                    const XML_Char *publicId);
454 
455 /* This is called in two situations:
456    1) An entity reference is encountered for which no declaration
457       has been read *and* this is not an error.
458    2) An internal entity reference is read, but not expanded, because
459       XML_SetDefaultHandler has been called.
460    Note: skipped parameter entities in declarations and skipped general
461          entities in attribute values cannot be reported, because
462          the event would be out of sync with the reporting of the
463          declarations or attribute values
464 */
465 typedef void(XMLCALL *XML_SkippedEntityHandler)(void *userData,
466                                                 const XML_Char *entityName,
467                                                 int is_parameter_entity);
468 
469 /* This structure is filled in by the XML_UnknownEncodingHandler to
470    provide information to the parser about encodings that are unknown
471    to the parser.
472 
473    The map[b] member gives information about byte sequences whose
474    first byte is b.
475 
476    If map[b] is c where c is >= 0, then b by itself encodes the
477    Unicode scalar value c.
478 
479    If map[b] is -1, then the byte sequence is malformed.
480 
481    If map[b] is -n, where n >= 2, then b is the first byte of an
482    n-byte sequence that encodes a single Unicode scalar value.
483 
484    The data member will be passed as the first argument to the convert
485    function.
486 
487    The convert function is used to convert multibyte sequences; s will
488    point to a n-byte sequence where map[(unsigned char)*s] == -n.  The
489    convert function must return the Unicode scalar value represented
490    by this byte sequence or -1 if the byte sequence is malformed.
491 
492    The convert function may be NULL if the encoding is a single-byte
493    encoding, that is if map[b] >= -1 for all bytes b.
494 
495    When the parser is finished with the encoding, then if release is
496    not NULL, it will call release passing it the data member; once
497    release has been called, the convert function will not be called
498    again.
499 
500    Expat places certain restrictions on the encodings that are supported
501    using this mechanism.
502 
503    1. Every ASCII character that can appear in a well-formed XML document,
504       other than the characters
505 
506       $@\^`{}~
507 
508       must be represented by a single byte, and that byte must be the
509       same byte that represents that character in ASCII.
510 
511    2. No character may require more than 4 bytes to encode.
512 
513    3. All characters encoded must have Unicode scalar values <=
514       0xFFFF, (i.e., characters that would be encoded by surrogates in
515       UTF-16 are  not allowed).  Note that this restriction doesn't
516       apply to the built-in support for UTF-8 and UTF-16.
517 
518    4. No Unicode character may be encoded by more than one distinct
519       sequence of bytes.
520 */
521 typedef struct {
522   int map[256];
523   void *data;
524   int(XMLCALL *convert)(void *data, const char *s);
525   void(XMLCALL *release)(void *data);
526 } XML_Encoding;
527 
528 /* This is called for an encoding that is unknown to the parser.
529 
530    The encodingHandlerData argument is that which was passed as the
531    second argument to XML_SetUnknownEncodingHandler.
532 
533    The name argument gives the name of the encoding as specified in
534    the encoding declaration.
535 
536    If the callback can provide information about the encoding, it must
537    fill in the XML_Encoding structure, and return XML_STATUS_OK.
538    Otherwise it must return XML_STATUS_ERROR.
539 
540    If info does not describe a suitable encoding, then the parser will
541    return an XML_ERROR_UNKNOWN_ENCODING error.
542 */
543 typedef int(XMLCALL *XML_UnknownEncodingHandler)(void *encodingHandlerData,
544                                                  const XML_Char *name,
545                                                  XML_Encoding *info);
546 
547 XMLPARSEAPI(void)
548 XML_SetElementHandler(XML_Parser parser, XML_StartElementHandler start,
549                       XML_EndElementHandler end);
550 
551 XMLPARSEAPI(void)
552 XML_SetStartElementHandler(XML_Parser parser, XML_StartElementHandler handler);
553 
554 XMLPARSEAPI(void)
555 XML_SetEndElementHandler(XML_Parser parser, XML_EndElementHandler handler);
556 
557 XMLPARSEAPI(void)
558 XML_SetCharacterDataHandler(XML_Parser parser,
559                             XML_CharacterDataHandler handler);
560 
561 XMLPARSEAPI(void)
562 XML_SetProcessingInstructionHandler(XML_Parser parser,
563                                     XML_ProcessingInstructionHandler handler);
564 XMLPARSEAPI(void)
565 XML_SetCommentHandler(XML_Parser parser, XML_CommentHandler handler);
566 
567 XMLPARSEAPI(void)
568 XML_SetCdataSectionHandler(XML_Parser parser,
569                            XML_StartCdataSectionHandler start,
570                            XML_EndCdataSectionHandler end);
571 
572 XMLPARSEAPI(void)
573 XML_SetStartCdataSectionHandler(XML_Parser parser,
574                                 XML_StartCdataSectionHandler start);
575 
576 XMLPARSEAPI(void)
577 XML_SetEndCdataSectionHandler(XML_Parser parser,
578                               XML_EndCdataSectionHandler end);
579 
580 /* This sets the default handler and also inhibits expansion of
581    internal entities. These entity references will be passed to the
582    default handler, or to the skipped entity handler, if one is set.
583 */
584 XMLPARSEAPI(void)
585 XML_SetDefaultHandler(XML_Parser parser, XML_DefaultHandler handler);
586 
587 /* This sets the default handler but does not inhibit expansion of
588    internal entities.  The entity reference will not be passed to the
589    default handler.
590 */
591 XMLPARSEAPI(void)
592 XML_SetDefaultHandlerExpand(XML_Parser parser, XML_DefaultHandler handler);
593 
594 XMLPARSEAPI(void)
595 XML_SetDoctypeDeclHandler(XML_Parser parser, XML_StartDoctypeDeclHandler start,
596                           XML_EndDoctypeDeclHandler end);
597 
598 XMLPARSEAPI(void)
599 XML_SetStartDoctypeDeclHandler(XML_Parser parser,
600                                XML_StartDoctypeDeclHandler start);
601 
602 XMLPARSEAPI(void)
603 XML_SetEndDoctypeDeclHandler(XML_Parser parser, XML_EndDoctypeDeclHandler end);
604 
605 XMLPARSEAPI(void)
606 XML_SetUnparsedEntityDeclHandler(XML_Parser parser,
607                                  XML_UnparsedEntityDeclHandler handler);
608 
609 XMLPARSEAPI(void)
610 XML_SetNotationDeclHandler(XML_Parser parser, XML_NotationDeclHandler handler);
611 
612 XMLPARSEAPI(void)
613 XML_SetNamespaceDeclHandler(XML_Parser parser,
614                             XML_StartNamespaceDeclHandler start,
615                             XML_EndNamespaceDeclHandler end);
616 
617 XMLPARSEAPI(void)
618 XML_SetStartNamespaceDeclHandler(XML_Parser parser,
619                                  XML_StartNamespaceDeclHandler start);
620 
621 XMLPARSEAPI(void)
622 XML_SetEndNamespaceDeclHandler(XML_Parser parser,
623                                XML_EndNamespaceDeclHandler end);
624 
625 XMLPARSEAPI(void)
626 XML_SetNotStandaloneHandler(XML_Parser parser,
627                             XML_NotStandaloneHandler handler);
628 
629 XMLPARSEAPI(void)
630 XML_SetExternalEntityRefHandler(XML_Parser parser,
631                                 XML_ExternalEntityRefHandler handler);
632 
633 /* If a non-NULL value for arg is specified here, then it will be
634    passed as the first argument to the external entity ref handler
635    instead of the parser object.
636 */
637 XMLPARSEAPI(void)
638 XML_SetExternalEntityRefHandlerArg(XML_Parser parser, void *arg);
639 
640 XMLPARSEAPI(void)
641 XML_SetSkippedEntityHandler(XML_Parser parser,
642                             XML_SkippedEntityHandler handler);
643 
644 XMLPARSEAPI(void)
645 XML_SetUnknownEncodingHandler(XML_Parser parser,
646                               XML_UnknownEncodingHandler handler,
647                               void *encodingHandlerData);
648 
649 /* This can be called within a handler for a start element, end
650    element, processing instruction or character data.  It causes the
651    corresponding markup to be passed to the default handler.
652 */
653 XMLPARSEAPI(void)
654 XML_DefaultCurrent(XML_Parser parser);
655 
656 /* If do_nst is non-zero, and namespace processing is in effect, and
657    a name has a prefix (i.e. an explicit namespace qualifier) then
658    that name is returned as a triplet in a single string separated by
659    the separator character specified when the parser was created: URI
660    + sep + local_name + sep + prefix.
661 
662    If do_nst is zero, then namespace information is returned in the
663    default manner (URI + sep + local_name) whether or not the name
664    has a prefix.
665 
666    Note: Calling XML_SetReturnNSTriplet after XML_Parse or
667      XML_ParseBuffer has no effect.
668 */
669 
670 XMLPARSEAPI(void)
671 XML_SetReturnNSTriplet(XML_Parser parser, int do_nst);
672 
673 /* This value is passed as the userData argument to callbacks. */
674 XMLPARSEAPI(void)
675 XML_SetUserData(XML_Parser parser, void *userData);
676 
677 /* Returns the last value set by XML_SetUserData or NULL. */
678 #define XML_GetUserData(parser) (*(void **)(parser))
679 
680 /* This is equivalent to supplying an encoding argument to
681    XML_ParserCreate. On success XML_SetEncoding returns non-zero,
682    zero otherwise.
683    Note: Calling XML_SetEncoding after XML_Parse or XML_ParseBuffer
684      has no effect and returns XML_STATUS_ERROR.
685 */
686 XMLPARSEAPI(enum XML_Status)
687 XML_SetEncoding(XML_Parser parser, const XML_Char *encoding);
688 
689 /* If this function is called, then the parser will be passed as the
690    first argument to callbacks instead of userData.  The userData will
691    still be accessible using XML_GetUserData.
692 */
693 XMLPARSEAPI(void)
694 XML_UseParserAsHandlerArg(XML_Parser parser);
695 
696 /* If useDTD == XML_TRUE is passed to this function, then the parser
697    will assume that there is an external subset, even if none is
698    specified in the document. In such a case the parser will call the
699    externalEntityRefHandler with a value of NULL for the systemId
700    argument (the publicId and context arguments will be NULL as well).
701    Note: For the purpose of checking WFC: Entity Declared, passing
702      useDTD == XML_TRUE will make the parser behave as if the document
703      had a DTD with an external subset.
704    Note: If this function is called, then this must be done before
705      the first call to XML_Parse or XML_ParseBuffer, since it will
706      have no effect after that.  Returns
707      XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING.
708    Note: If the document does not have a DOCTYPE declaration at all,
709      then startDoctypeDeclHandler and endDoctypeDeclHandler will not
710      be called, despite an external subset being parsed.
711    Note: If XML_DTD is not defined when Expat is compiled, returns
712      XML_ERROR_FEATURE_REQUIRES_XML_DTD.
713    Note: If parser == NULL, returns XML_ERROR_INVALID_ARGUMENT.
714 */
715 XMLPARSEAPI(enum XML_Error)
716 XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD);
717 
718 /* Sets the base to be used for resolving relative URIs in system
719    identifiers in declarations.  Resolving relative identifiers is
720    left to the application: this value will be passed through as the
721    base argument to the XML_ExternalEntityRefHandler,
722    XML_NotationDeclHandler and XML_UnparsedEntityDeclHandler. The base
723    argument will be copied.  Returns XML_STATUS_ERROR if out of memory,
724    XML_STATUS_OK otherwise.
725 */
726 XMLPARSEAPI(enum XML_Status)
727 XML_SetBase(XML_Parser parser, const XML_Char *base);
728 
729 XMLPARSEAPI(const XML_Char *)
730 XML_GetBase(XML_Parser parser);
731 
732 /* Returns the number of the attribute/value pairs passed in last call
733    to the XML_StartElementHandler that were specified in the start-tag
734    rather than defaulted. Each attribute/value pair counts as 2; thus
735    this corresponds to an index into the atts array passed to the
736    XML_StartElementHandler.  Returns -1 if parser == NULL.
737 */
738 XMLPARSEAPI(int)
739 XML_GetSpecifiedAttributeCount(XML_Parser parser);
740 
741 /* Returns the index of the ID attribute passed in the last call to
742    XML_StartElementHandler, or -1 if there is no ID attribute or
743    parser == NULL.  Each attribute/value pair counts as 2; thus this
744    corresponds to an index into the atts array passed to the
745    XML_StartElementHandler.
746 */
747 XMLPARSEAPI(int)
748 XML_GetIdAttributeIndex(XML_Parser parser);
749 
750 #ifdef XML_ATTR_INFO
751 /* Source file byte offsets for the start and end of attribute names and values.
752    The value indices are exclusive of surrounding quotes; thus in a UTF-8 source
753    file an attribute value of "blah" will yield:
754    info->valueEnd - info->valueStart = 4 bytes.
755 */
756 typedef struct {
757   XML_Index nameStart;  /* Offset to beginning of the attribute name. */
758   XML_Index nameEnd;    /* Offset after the attribute name's last byte. */
759   XML_Index valueStart; /* Offset to beginning of the attribute value. */
760   XML_Index valueEnd;   /* Offset after the attribute value's last byte. */
761 } XML_AttrInfo;
762 
763 /* Returns an array of XML_AttrInfo structures for the attribute/value pairs
764    passed in last call to the XML_StartElementHandler that were specified
765    in the start-tag rather than defaulted. Each attribute/value pair counts
766    as 1; thus the number of entries in the array is
767    XML_GetSpecifiedAttributeCount(parser) / 2.
768 */
769 XMLPARSEAPI(const XML_AttrInfo *)
770 XML_GetAttributeInfo(XML_Parser parser);
771 #endif
772 
773 /* Parses some input. Returns XML_STATUS_ERROR if a fatal error is
774    detected.  The last call to XML_Parse must have isFinal true; len
775    may be zero for this call (or any other).
776 
777    Though the return values for these functions has always been
778    described as a Boolean value, the implementation, at least for the
779    1.95.x series, has always returned exactly one of the XML_Status
780    values.
781 */
782 XMLPARSEAPI(enum XML_Status)
783 XML_Parse(XML_Parser parser, const char *s, int len, int isFinal);
784 
785 XMLPARSEAPI(void *)
786 XML_GetBuffer(XML_Parser parser, int len);
787 
788 XMLPARSEAPI(enum XML_Status)
789 XML_ParseBuffer(XML_Parser parser, int len, int isFinal);
790 
791 /* Stops parsing, causing XML_Parse() or XML_ParseBuffer() to return.
792    Must be called from within a call-back handler, except when aborting
793    (resumable = 0) an already suspended parser. Some call-backs may
794    still follow because they would otherwise get lost. Examples:
795    - endElementHandler() for empty elements when stopped in
796      startElementHandler(),
797    - endNameSpaceDeclHandler() when stopped in endElementHandler(),
798    and possibly others.
799 
800    Can be called from most handlers, including DTD related call-backs,
801    except when parsing an external parameter entity and resumable != 0.
802    Returns XML_STATUS_OK when successful, XML_STATUS_ERROR otherwise.
803    Possible error codes:
804    - XML_ERROR_SUSPENDED: when suspending an already suspended parser.
805    - XML_ERROR_FINISHED: when the parser has already finished.
806    - XML_ERROR_SUSPEND_PE: when suspending while parsing an external PE.
807 
808    When resumable != 0 (true) then parsing is suspended, that is,
809    XML_Parse() and XML_ParseBuffer() return XML_STATUS_SUSPENDED.
810    Otherwise, parsing is aborted, that is, XML_Parse() and XML_ParseBuffer()
811    return XML_STATUS_ERROR with error code XML_ERROR_ABORTED.
812 
813    *Note*:
814    This will be applied to the current parser instance only, that is, if
815    there is a parent parser then it will continue parsing when the
816    externalEntityRefHandler() returns. It is up to the implementation of
817    the externalEntityRefHandler() to call XML_StopParser() on the parent
818    parser (recursively), if one wants to stop parsing altogether.
819 
820    When suspended, parsing can be resumed by calling XML_ResumeParser().
821 */
822 XMLPARSEAPI(enum XML_Status)
823 XML_StopParser(XML_Parser parser, XML_Bool resumable);
824 
825 /* Resumes parsing after it has been suspended with XML_StopParser().
826    Must not be called from within a handler call-back. Returns same
827    status codes as XML_Parse() or XML_ParseBuffer().
828    Additional error code XML_ERROR_NOT_SUSPENDED possible.
829 
830    *Note*:
831    This must be called on the most deeply nested child parser instance
832    first, and on its parent parser only after the child parser has finished,
833    to be applied recursively until the document entity's parser is restarted.
834    That is, the parent parser will not resume by itself and it is up to the
835    application to call XML_ResumeParser() on it at the appropriate moment.
836 */
837 XMLPARSEAPI(enum XML_Status)
838 XML_ResumeParser(XML_Parser parser);
839 
840 enum XML_Parsing { XML_INITIALIZED, XML_PARSING, XML_FINISHED, XML_SUSPENDED };
841 
842 typedef struct {
843   enum XML_Parsing parsing;
844   XML_Bool finalBuffer;
845 } XML_ParsingStatus;
846 
847 /* Returns status of parser with respect to being initialized, parsing,
848    finished, or suspended and processing the final buffer.
849    XXX XML_Parse() and XML_ParseBuffer() should return XML_ParsingStatus,
850    XXX with XML_FINISHED_OK or XML_FINISHED_ERROR replacing XML_FINISHED
851 */
852 XMLPARSEAPI(void)
853 XML_GetParsingStatus(XML_Parser parser, XML_ParsingStatus *status);
854 
855 /* Creates an XML_Parser object that can parse an external general
856    entity; context is a '\0'-terminated string specifying the parse
857    context; encoding is a '\0'-terminated string giving the name of
858    the externally specified encoding, or NULL if there is no
859    externally specified encoding.  The context string consists of a
860    sequence of tokens separated by formfeeds (\f); a token consisting
861    of a name specifies that the general entity of the name is open; a
862    token of the form prefix=uri specifies the namespace for a
863    particular prefix; a token of the form =uri specifies the default
864    namespace.  This can be called at any point after the first call to
865    an ExternalEntityRefHandler so longer as the parser has not yet
866    been freed.  The new parser is completely independent and may
867    safely be used in a separate thread.  The handlers and userData are
868    initialized from the parser argument.  Returns NULL if out of memory.
869    Otherwise returns a new XML_Parser object.
870 */
871 XMLPARSEAPI(XML_Parser)
872 XML_ExternalEntityParserCreate(XML_Parser parser, const XML_Char *context,
873                                const XML_Char *encoding);
874 
875 enum XML_ParamEntityParsing {
876   XML_PARAM_ENTITY_PARSING_NEVER,
877   XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE,
878   XML_PARAM_ENTITY_PARSING_ALWAYS
879 };
880 
881 /* Controls parsing of parameter entities (including the external DTD
882    subset). If parsing of parameter entities is enabled, then
883    references to external parameter entities (including the external
884    DTD subset) will be passed to the handler set with
885    XML_SetExternalEntityRefHandler.  The context passed will be 0.
886 
887    Unlike external general entities, external parameter entities can
888    only be parsed synchronously.  If the external parameter entity is
889    to be parsed, it must be parsed during the call to the external
890    entity ref handler: the complete sequence of
891    XML_ExternalEntityParserCreate, XML_Parse/XML_ParseBuffer and
892    XML_ParserFree calls must be made during this call.  After
893    XML_ExternalEntityParserCreate has been called to create the parser
894    for the external parameter entity (context must be 0 for this
895    call), it is illegal to make any calls on the old parser until
896    XML_ParserFree has been called on the newly created parser.
897    If the library has been compiled without support for parameter
898    entity parsing (ie without XML_DTD being defined), then
899    XML_SetParamEntityParsing will return 0 if parsing of parameter
900    entities is requested; otherwise it will return non-zero.
901    Note: If XML_SetParamEntityParsing is called after XML_Parse or
902       XML_ParseBuffer, then it has no effect and will always return 0.
903    Note: If parser == NULL, the function will do nothing and return 0.
904 */
905 XMLPARSEAPI(int)
906 XML_SetParamEntityParsing(XML_Parser parser,
907                           enum XML_ParamEntityParsing parsing);
908 
909 /* Sets the hash salt to use for internal hash calculations.
910    Helps in preventing DoS attacks based on predicting hash
911    function behavior. This must be called before parsing is started.
912    Returns 1 if successful, 0 when called after parsing has started.
913    Note: If parser == NULL, the function will do nothing and return 0.
914 */
915 XMLPARSEAPI(int)
916 XML_SetHashSalt(XML_Parser parser, unsigned long hash_salt);
917 
918 /* If XML_Parse or XML_ParseBuffer have returned XML_STATUS_ERROR, then
919    XML_GetErrorCode returns information about the error.
920 */
921 XMLPARSEAPI(enum XML_Error)
922 XML_GetErrorCode(XML_Parser parser);
923 
924 /* These functions return information about the current parse
925    location.  They may be called from any callback called to report
926    some parse event; in this case the location is the location of the
927    first of the sequence of characters that generated the event.  When
928    called from callbacks generated by declarations in the document
929    prologue, the location identified isn't as neatly defined, but will
930    be within the relevant markup.  When called outside of the callback
931    functions, the position indicated will be just past the last parse
932    event (regardless of whether there was an associated callback).
933 
934    They may also be called after returning from a call to XML_Parse
935    or XML_ParseBuffer.  If the return value is XML_STATUS_ERROR then
936    the location is the location of the character at which the error
937    was detected; otherwise the location is the location of the last
938    parse event, as described above.
939 
940    Note: XML_GetCurrentLineNumber and XML_GetCurrentColumnNumber
941    return 0 to indicate an error.
942    Note: XML_GetCurrentByteIndex returns -1 to indicate an error.
943 */
944 XMLPARSEAPI(XML_Size) XML_GetCurrentLineNumber(XML_Parser parser);
945 XMLPARSEAPI(XML_Size) XML_GetCurrentColumnNumber(XML_Parser parser);
946 XMLPARSEAPI(XML_Index) XML_GetCurrentByteIndex(XML_Parser parser);
947 
948 /* Return the number of bytes in the current event.
949    Returns 0 if the event is in an internal entity.
950 */
951 XMLPARSEAPI(int)
952 XML_GetCurrentByteCount(XML_Parser parser);
953 
954 /* If XML_CONTEXT_BYTES is defined, returns the input buffer, sets
955    the integer pointed to by offset to the offset within this buffer
956    of the current parse position, and sets the integer pointed to by size
957    to the size of this buffer (the number of input bytes). Otherwise
958    returns a NULL pointer. Also returns a NULL pointer if a parse isn't
959    active.
960 
961    NOTE: The character pointer returned should not be used outside
962    the handler that makes the call.
963 */
964 XMLPARSEAPI(const char *)
965 XML_GetInputContext(XML_Parser parser, int *offset, int *size);
966 
967 /* For backwards compatibility with previous versions. */
968 #define XML_GetErrorLineNumber XML_GetCurrentLineNumber
969 #define XML_GetErrorColumnNumber XML_GetCurrentColumnNumber
970 #define XML_GetErrorByteIndex XML_GetCurrentByteIndex
971 
972 /* Frees the content model passed to the element declaration handler */
973 XMLPARSEAPI(void)
974 XML_FreeContentModel(XML_Parser parser, XML_Content *model);
975 
976 /* Exposing the memory handling functions used in Expat */
977 XMLPARSEAPI(void *)
978 XML_ATTR_MALLOC
979 XML_ATTR_ALLOC_SIZE(2)
980 XML_MemMalloc(XML_Parser parser, size_t size);
981 
982 XMLPARSEAPI(void *)
983 XML_ATTR_ALLOC_SIZE(3)
984 XML_MemRealloc(XML_Parser parser, void *ptr, size_t size);
985 
986 XMLPARSEAPI(void)
987 XML_MemFree(XML_Parser parser, void *ptr);
988 
989 /* Frees memory used by the parser. */
990 XMLPARSEAPI(void)
991 XML_ParserFree(XML_Parser parser);
992 
993 /* Returns a string describing the error. */
994 XMLPARSEAPI(const XML_LChar *)
995 XML_ErrorString(enum XML_Error code);
996 
997 /* Return a string containing the version number of this expat */
998 XMLPARSEAPI(const XML_LChar *)
999 XML_ExpatVersion(void);
1000 
1001 typedef struct {
1002   int major;
1003   int minor;
1004   int micro;
1005 } XML_Expat_Version;
1006 
1007 /* Return an XML_Expat_Version structure containing numeric version
1008    number information for this version of expat.
1009 */
1010 XMLPARSEAPI(XML_Expat_Version)
1011 XML_ExpatVersionInfo(void);
1012 
1013 /* Added in Expat 1.95.5. */
1014 enum XML_FeatureEnum {
1015   XML_FEATURE_END = 0,
1016   XML_FEATURE_UNICODE,
1017   XML_FEATURE_UNICODE_WCHAR_T,
1018   XML_FEATURE_DTD,
1019   XML_FEATURE_CONTEXT_BYTES,
1020   XML_FEATURE_MIN_SIZE,
1021   XML_FEATURE_SIZEOF_XML_CHAR,
1022   XML_FEATURE_SIZEOF_XML_LCHAR,
1023   XML_FEATURE_NS,
1024   XML_FEATURE_LARGE_SIZE,
1025   XML_FEATURE_ATTR_INFO,
1026   /* Added in Expat 2.4.0. */
1027   XML_FEATURE_BILLION_LAUGHS_ATTACK_PROTECTION_MAXIMUM_AMPLIFICATION_DEFAULT,
1028   XML_FEATURE_BILLION_LAUGHS_ATTACK_PROTECTION_ACTIVATION_THRESHOLD_DEFAULT
1029   /* Additional features must be added to the end of this enum. */
1030 };
1031 
1032 typedef struct {
1033   enum XML_FeatureEnum feature;
1034   const XML_LChar *name;
1035   long int value;
1036 } XML_Feature;
1037 
1038 XMLPARSEAPI(const XML_Feature *)
1039 XML_GetFeatureList(void);
1040 
1041 #ifdef XML_DTD
1042 /* Added in Expat 2.4.0. */
1043 XMLPARSEAPI(XML_Bool)
1044 XML_SetBillionLaughsAttackProtectionMaximumAmplification(
1045     XML_Parser parser, float maximumAmplificationFactor);
1046 
1047 /* Added in Expat 2.4.0. */
1048 XMLPARSEAPI(XML_Bool)
1049 XML_SetBillionLaughsAttackProtectionActivationThreshold(
1050     XML_Parser parser, unsigned long long activationThresholdBytes);
1051 #endif
1052 
1053 /* Expat follows the semantic versioning convention.
1054    See http://semver.org.
1055 */
1056 #define XML_MAJOR_VERSION 2
1057 #define XML_MINOR_VERSION 4
1058 #define XML_MICRO_VERSION 9
1059 
1060 #ifdef __cplusplus
1061 }
1062 #endif
1063 
1064 #endif /* not Expat_INCLUDED */
1065