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      1 /* Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
      2    See the file COPYING for copying permission.
      3 */
      4 
      5 #ifndef Expat_INCLUDED
      6 #define Expat_INCLUDED 1
      7 
      8 #ifdef __VMS
      9 /*      0        1         2         3      0        1         2         3
     10         1234567890123456789012345678901     1234567890123456789012345678901 */
     11 #define XML_SetProcessingInstructionHandler XML_SetProcessingInstrHandler
     12 #define XML_SetUnparsedEntityDeclHandler    XML_SetUnparsedEntDeclHandler
     13 #define XML_SetStartNamespaceDeclHandler    XML_SetStartNamespcDeclHandler
     14 #define XML_SetExternalEntityRefHandlerArg  XML_SetExternalEntRefHandlerArg
     15 #endif
     16 
     17 #include <stdlib.h>
     18 #include "expat_external.h"
     19 
     20 #ifdef __cplusplus
     21 extern "C" {
     22 #endif
     23 
     24 struct XML_ParserStruct;
     25 typedef struct XML_ParserStruct *XML_Parser;
     26 
     27 /* Should this be defined using stdbool.h when C99 is available? */
     28 typedef unsigned char XML_Bool;
     29 #define XML_TRUE   ((XML_Bool) 1)
     30 #define XML_FALSE  ((XML_Bool) 0)
     31 
     32 /* The XML_Status enum gives the possible return values for several
     33    API functions.  The preprocessor #defines are included so this
     34    stanza can be added to code that still needs to support older
     35    versions of Expat 1.95.x:
     36 
     37    #ifndef XML_STATUS_OK
     38    #define XML_STATUS_OK    1
     39    #define XML_STATUS_ERROR 0
     40    #endif
     41 
     42    Otherwise, the #define hackery is quite ugly and would have been
     43    dropped.
     44 */
     45 enum XML_Status {
     46   XML_STATUS_ERROR = 0,
     47 #define XML_STATUS_ERROR XML_STATUS_ERROR
     48   XML_STATUS_OK = 1,
     49 #define XML_STATUS_OK XML_STATUS_OK
     50   XML_STATUS_SUSPENDED = 2
     51 #define XML_STATUS_SUSPENDED XML_STATUS_SUSPENDED
     52 };
     53 
     54 enum XML_Error {
     55   XML_ERROR_NONE,
     56   XML_ERROR_NO_MEMORY,
     57   XML_ERROR_SYNTAX,
     58   XML_ERROR_NO_ELEMENTS,
     59   XML_ERROR_INVALID_TOKEN,
     60   XML_ERROR_UNCLOSED_TOKEN,
     61   XML_ERROR_PARTIAL_CHAR,
     62   XML_ERROR_TAG_MISMATCH,
     63   XML_ERROR_DUPLICATE_ATTRIBUTE,
     64   XML_ERROR_JUNK_AFTER_DOC_ELEMENT,
     65   XML_ERROR_PARAM_ENTITY_REF,
     66   XML_ERROR_UNDEFINED_ENTITY,
     67   XML_ERROR_RECURSIVE_ENTITY_REF,
     68   XML_ERROR_ASYNC_ENTITY,
     69   XML_ERROR_BAD_CHAR_REF,
     70   XML_ERROR_BINARY_ENTITY_REF,
     71   XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF,
     72   XML_ERROR_MISPLACED_XML_PI,
     73   XML_ERROR_UNKNOWN_ENCODING,
     74   XML_ERROR_INCORRECT_ENCODING,
     75   XML_ERROR_UNCLOSED_CDATA_SECTION,
     76   XML_ERROR_EXTERNAL_ENTITY_HANDLING,
     77   XML_ERROR_NOT_STANDALONE,
     78   XML_ERROR_UNEXPECTED_STATE,
     79   XML_ERROR_ENTITY_DECLARED_IN_PE,
     80   XML_ERROR_FEATURE_REQUIRES_XML_DTD,
     81   XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING,
     82   /* Added in 1.95.7. */
     83   XML_ERROR_UNBOUND_PREFIX,
     84   /* Added in 1.95.8. */
     85   XML_ERROR_UNDECLARING_PREFIX,
     86   XML_ERROR_INCOMPLETE_PE,
     87   XML_ERROR_XML_DECL,
     88   XML_ERROR_TEXT_DECL,
     89   XML_ERROR_PUBLICID,
     90   XML_ERROR_SUSPENDED,
     91   XML_ERROR_NOT_SUSPENDED,
     92   XML_ERROR_ABORTED,
     93   XML_ERROR_FINISHED,
     94   XML_ERROR_SUSPEND_PE,
     95   /* Added in 2.0. */
     96   XML_ERROR_RESERVED_PREFIX_XML,
     97   XML_ERROR_RESERVED_PREFIX_XMLNS,
     98   XML_ERROR_RESERVED_NAMESPACE_URI
     99 };
    100 
    101 enum XML_Content_Type {
    102   XML_CTYPE_EMPTY = 1,
    103   XML_CTYPE_ANY,
    104   XML_CTYPE_MIXED,
    105   XML_CTYPE_NAME,
    106   XML_CTYPE_CHOICE,
    107   XML_CTYPE_SEQ
    108 };
    109 
    110 enum XML_Content_Quant {
    111   XML_CQUANT_NONE,
    112   XML_CQUANT_OPT,
    113   XML_CQUANT_REP,
    114   XML_CQUANT_PLUS
    115 };
    116 
    117 /* If type == XML_CTYPE_EMPTY or XML_CTYPE_ANY, then quant will be
    118    XML_CQUANT_NONE, and the other fields will be zero or NULL.
    119    If type == XML_CTYPE_MIXED, then quant will be NONE or REP and
    120    numchildren will contain number of elements that may be mixed in
    121    and children point to an array of XML_Content cells that will be
    122    all of XML_CTYPE_NAME type with no quantification.
    123 
    124    If type == XML_CTYPE_NAME, then the name points to the name, and
    125    the numchildren field will be zero and children will be NULL. The
    126    quant fields indicates any quantifiers placed on the name.
    127 
    128    CHOICE and SEQ will have name NULL, the number of children in
    129    numchildren and children will point, recursively, to an array
    130    of XML_Content cells.
    131 
    132    The EMPTY, ANY, and MIXED types will only occur at top level.
    133 */
    134 
    135 typedef struct XML_cp XML_Content;
    136 
    137 struct XML_cp {
    138   enum XML_Content_Type         type;
    139   enum XML_Content_Quant        quant;
    140   XML_Char *                    name;
    141   unsigned int                  numchildren;
    142   XML_Content *                 children;
    143 };
    144 
    145 
    146 /* This is called for an element declaration. See above for
    147    description of the model argument. It's the caller's responsibility
    148    to free model when finished with it.
    149 */
    150 typedef void (XMLCALL *XML_ElementDeclHandler) (void *userData,
    151                                                 const XML_Char *name,
    152                                                 XML_Content *model);
    153 
    154 XMLPARSEAPI(void)
    155 XML_SetElementDeclHandler(XML_Parser parser,
    156                           XML_ElementDeclHandler eldecl);
    157 
    158 /* The Attlist declaration handler is called for *each* attribute. So
    159    a single Attlist declaration with multiple attributes declared will
    160    generate multiple calls to this handler. The "default" parameter
    161    may be NULL in the case of the "#IMPLIED" or "#REQUIRED"
    162    keyword. The "isrequired" parameter will be true and the default
    163    value will be NULL in the case of "#REQUIRED". If "isrequired" is
    164    true and default is non-NULL, then this is a "#FIXED" default.
    165 */
    166 typedef void (XMLCALL *XML_AttlistDeclHandler) (
    167                                     void            *userData,
    168                                     const XML_Char  *elname,
    169                                     const XML_Char  *attname,
    170                                     const XML_Char  *att_type,
    171                                     const XML_Char  *dflt,
    172                                     int              isrequired);
    173 
    174 XMLPARSEAPI(void)
    175 XML_SetAttlistDeclHandler(XML_Parser parser,
    176                           XML_AttlistDeclHandler attdecl);
    177 
    178 /* The XML declaration handler is called for *both* XML declarations
    179    and text declarations. The way to distinguish is that the version
    180    parameter will be NULL for text declarations. The encoding
    181    parameter may be NULL for XML declarations. The standalone
    182    parameter will be -1, 0, or 1 indicating respectively that there
    183    was no standalone parameter in the declaration, that it was given
    184    as no, or that it was given as yes.
    185 */
    186 typedef void (XMLCALL *XML_XmlDeclHandler) (void           *userData,
    187                                             const XML_Char *version,
    188                                             const XML_Char *encoding,
    189                                             int             standalone);
    190 
    191 XMLPARSEAPI(void)
    192 XML_SetXmlDeclHandler(XML_Parser parser,
    193                       XML_XmlDeclHandler xmldecl);
    194 
    195 
    196 typedef struct {
    197   void *(*malloc_fcn)(size_t size);
    198   void *(*realloc_fcn)(void *ptr, size_t size);
    199   void (*free_fcn)(void *ptr);
    200 } XML_Memory_Handling_Suite;
    201 
    202 /* Constructs a new parser; encoding is the encoding specified by the
    203    external protocol or NULL if there is none specified.
    204 */
    205 XMLPARSEAPI(XML_Parser)
    206 XML_ParserCreate(const XML_Char *encoding);
    207 
    208 /* Constructs a new parser and namespace processor.  Element type
    209    names and attribute names that belong to a namespace will be
    210    expanded; unprefixed attribute names are never expanded; unprefixed
    211    element type names are expanded only if there is a default
    212    namespace. The expanded name is the concatenation of the namespace
    213    URI, the namespace separator character, and the local part of the
    214    name.  If the namespace separator is '\0' then the namespace URI
    215    and the local part will be concatenated without any separator.
    216    It is a programming error to use the separator '\0' with namespace
    217    triplets (see XML_SetReturnNSTriplet).
    218 */
    219 XMLPARSEAPI(XML_Parser)
    220 XML_ParserCreateNS(const XML_Char *encoding, XML_Char namespaceSeparator);
    221 
    222 
    223 /* Constructs a new parser using the memory management suite referred to
    224    by memsuite. If memsuite is NULL, then use the standard library memory
    225    suite. If namespaceSeparator is non-NULL it creates a parser with
    226    namespace processing as described above. The character pointed at
    227    will serve as the namespace separator.
    228 
    229    All further memory operations used for the created parser will come from
    230    the given suite.
    231 */
    232 XMLPARSEAPI(XML_Parser)
    233 XML_ParserCreate_MM(const XML_Char *encoding,
    234                     const XML_Memory_Handling_Suite *memsuite,
    235                     const XML_Char *namespaceSeparator);
    236 
    237 /* Prepare a parser object to be re-used.  This is particularly
    238    valuable when memory allocation overhead is disproportionatly high,
    239    such as when a large number of small documnents need to be parsed.
    240    All handlers are cleared from the parser, except for the
    241    unknownEncodingHandler. The parser's external state is re-initialized
    242    except for the values of ns and ns_triplets.
    243 
    244    Added in Expat 1.95.3.
    245 */
    246 XMLPARSEAPI(XML_Bool)
    247 XML_ParserReset(XML_Parser parser, const XML_Char *encoding);
    248 
    249 /* atts is array of name/value pairs, terminated by 0;
    250    names and values are 0 terminated.
    251 */
    252 typedef void (XMLCALL *XML_StartElementHandler) (void *userData,
    253                                                  const XML_Char *name,
    254                                                  const XML_Char **atts);
    255 
    256 typedef void (XMLCALL *XML_EndElementHandler) (void *userData,
    257                                                const XML_Char *name);
    258 
    259 
    260 /* s is not 0 terminated. */
    261 typedef void (XMLCALL *XML_CharacterDataHandler) (void *userData,
    262                                                   const XML_Char *s,
    263                                                   int len);
    264 
    265 /* target and data are 0 terminated */
    266 typedef void (XMLCALL *XML_ProcessingInstructionHandler) (
    267                                                 void *userData,
    268                                                 const XML_Char *target,
    269                                                 const XML_Char *data);
    270 
    271 /* data is 0 terminated */
    272 typedef void (XMLCALL *XML_CommentHandler) (void *userData,
    273                                             const XML_Char *data);
    274 
    275 typedef void (XMLCALL *XML_StartCdataSectionHandler) (void *userData);
    276 typedef void (XMLCALL *XML_EndCdataSectionHandler) (void *userData);
    277 
    278 /* This is called for any characters in the XML document for which
    279    there is no applicable handler.  This includes both characters that
    280    are part of markup which is of a kind that is not reported
    281    (comments, markup declarations), or characters that are part of a
    282    construct which could be reported but for which no handler has been
    283    supplied. The characters are passed exactly as they were in the XML
    284    document except that they will be encoded in UTF-8 or UTF-16.
    285    Line boundaries are not normalized. Note that a byte order mark
    286    character is not passed to the default handler. There are no
    287    guarantees about how characters are divided between calls to the
    288    default handler: for example, a comment might be split between
    289    multiple calls.
    290 */
    291 typedef void (XMLCALL *XML_DefaultHandler) (void *userData,
    292                                             const XML_Char *s,
    293                                             int len);
    294 
    295 /* This is called for the start of the DOCTYPE declaration, before
    296    any DTD or internal subset is parsed.
    297 */
    298 typedef void (XMLCALL *XML_StartDoctypeDeclHandler) (
    299                                             void *userData,
    300                                             const XML_Char *doctypeName,
    301                                             const XML_Char *sysid,
    302                                             const XML_Char *pubid,
    303                                             int has_internal_subset);
    304 
    305 /* This is called for the start of the DOCTYPE declaration when the
    306    closing > is encountered, but after processing any external
    307    subset.
    308 */
    309 typedef void (XMLCALL *XML_EndDoctypeDeclHandler)(void *userData);
    310 
    311 /* This is called for entity declarations. The is_parameter_entity
    312    argument will be non-zero if the entity is a parameter entity, zero
    313    otherwise.
    314 
    315    For internal entities (<!ENTITY foo "bar">), value will
    316    be non-NULL and systemId, publicID, and notationName will be NULL.
    317    The value string is NOT nul-terminated; the length is provided in
    318    the value_length argument. Since it is legal to have zero-length
    319    values, do not use this argument to test for internal entities.
    320 
    321    For external entities, value will be NULL and systemId will be
    322    non-NULL. The publicId argument will be NULL unless a public
    323    identifier was provided. The notationName argument will have a
    324    non-NULL value only for unparsed entity declarations.
    325 
    326    Note that is_parameter_entity can't be changed to XML_Bool, since
    327    that would break binary compatibility.
    328 */
    329 typedef void (XMLCALL *XML_EntityDeclHandler) (
    330                               void *userData,
    331                               const XML_Char *entityName,
    332                               int is_parameter_entity,
    333                               const XML_Char *value,
    334                               int value_length,
    335                               const XML_Char *base,
    336                               const XML_Char *systemId,
    337                               const XML_Char *publicId,
    338                               const XML_Char *notationName);
    339 
    340 XMLPARSEAPI(void)
    341 XML_SetEntityDeclHandler(XML_Parser parser,
    342                          XML_EntityDeclHandler handler);
    343 
    344 /* OBSOLETE -- OBSOLETE -- OBSOLETE
    345    This handler has been superceded by the EntityDeclHandler above.
    346    It is provided here for backward compatibility.
    347 
    348    This is called for a declaration of an unparsed (NDATA) entity.
    349    The base argument is whatever was set by XML_SetBase. The
    350    entityName, systemId and notationName arguments will never be
    351    NULL. The other arguments may be.
    352 */
    353 typedef void (XMLCALL *XML_UnparsedEntityDeclHandler) (
    354                                     void *userData,
    355                                     const XML_Char *entityName,
    356                                     const XML_Char *base,
    357                                     const XML_Char *systemId,
    358                                     const XML_Char *publicId,
    359                                     const XML_Char *notationName);
    360 
    361 /* This is called for a declaration of notation.  The base argument is
    362    whatever was set by XML_SetBase. The notationName will never be
    363    NULL.  The other arguments can be.
    364 */
    365 typedef void (XMLCALL *XML_NotationDeclHandler) (
    366                                     void *userData,
    367                                     const XML_Char *notationName,
    368                                     const XML_Char *base,
    369                                     const XML_Char *systemId,
    370                                     const XML_Char *publicId);
    371 
    372 /* When namespace processing is enabled, these are called once for
    373    each namespace declaration. The call to the start and end element
    374    handlers occur between the calls to the start and end namespace
    375    declaration handlers. For an xmlns attribute, prefix will be
    376    NULL.  For an xmlns="" attribute, uri will be NULL.
    377 */
    378 typedef void (XMLCALL *XML_StartNamespaceDeclHandler) (
    379                                     void *userData,
    380                                     const XML_Char *prefix,
    381                                     const XML_Char *uri);
    382 
    383 typedef void (XMLCALL *XML_EndNamespaceDeclHandler) (
    384                                     void *userData,
    385                                     const XML_Char *prefix);
    386 
    387 /* This is called if the document is not standalone, that is, it has an
    388    external subset or a reference to a parameter entity, but does not
    389    have standalone="yes". If this handler returns XML_STATUS_ERROR,
    390    then processing will not continue, and the parser will return a
    391    XML_ERROR_NOT_STANDALONE error.
    392    If parameter entity parsing is enabled, then in addition to the
    393    conditions above this handler will only be called if the referenced
    394    entity was actually read.
    395 */
    396 typedef int (XMLCALL *XML_NotStandaloneHandler) (void *userData);
    397 
    398 /* This is called for a reference to an external parsed general
    399    entity.  The referenced entity is not automatically parsed.  The
    400    application can parse it immediately or later using
    401    XML_ExternalEntityParserCreate.
    402 
    403    The parser argument is the parser parsing the entity containing the
    404    reference; it can be passed as the parser argument to
    405    XML_ExternalEntityParserCreate.  The systemId argument is the
    406    system identifier as specified in the entity declaration; it will
    407    not be NULL.
    408 
    409    The base argument is the system identifier that should be used as
    410    the base for resolving systemId if systemId was relative; this is
    411    set by XML_SetBase; it may be NULL.
    412 
    413    The publicId argument is the public identifier as specified in the
    414    entity declaration, or NULL if none was specified; the whitespace
    415    in the public identifier will have been normalized as required by
    416    the XML spec.
    417 
    418    The context argument specifies the parsing context in the format
    419    expected by the context argument to XML_ExternalEntityParserCreate;
    420    context is valid only until the handler returns, so if the
    421    referenced entity is to be parsed later, it must be copied.
    422    context is NULL only when the entity is a parameter entity.
    423 
    424    The handler should return XML_STATUS_ERROR if processing should not
    425    continue because of a fatal error in the handling of the external
    426    entity.  In this case the calling parser will return an
    427    XML_ERROR_EXTERNAL_ENTITY_HANDLING error.
    428 
    429    Note that unlike other handlers the first argument is the parser,
    430    not userData.
    431 */
    432 typedef int (XMLCALL *XML_ExternalEntityRefHandler) (
    433                                     XML_Parser parser,
    434                                     const XML_Char *context,
    435                                     const XML_Char *base,
    436                                     const XML_Char *systemId,
    437                                     const XML_Char *publicId);
    438 
    439 /* This is called in two situations:
    440    1) An entity reference is encountered for which no declaration
    441       has been read *and* this is not an error.
    442    2) An internal entity reference is read, but not expanded, because
    443       XML_SetDefaultHandler has been called.
    444    Note: skipped parameter entities in declarations and skipped general
    445          entities in attribute values cannot be reported, because
    446          the event would be out of sync with the reporting of the
    447          declarations or attribute values
    448 */
    449 typedef void (XMLCALL *XML_SkippedEntityHandler) (
    450                                     void *userData,
    451                                     const XML_Char *entityName,
    452                                     int is_parameter_entity);
    453 
    454 /* This structure is filled in by the XML_UnknownEncodingHandler to
    455    provide information to the parser about encodings that are unknown
    456    to the parser.
    457 
    458    The map[b] member gives information about byte sequences whose
    459    first byte is b.
    460 
    461    If map[b] is c where c is >= 0, then b by itself encodes the
    462    Unicode scalar value c.
    463 
    464    If map[b] is -1, then the byte sequence is malformed.
    465 
    466    If map[b] is -n, where n >= 2, then b is the first byte of an
    467    n-byte sequence that encodes a single Unicode scalar value.
    468 
    469    The data member will be passed as the first argument to the convert
    470    function.
    471 
    472    The convert function is used to convert multibyte sequences; s will
    473    point to a n-byte sequence where map[(unsigned char)*s] == -n.  The
    474    convert function must return the Unicode scalar value represented
    475    by this byte sequence or -1 if the byte sequence is malformed.
    476 
    477    The convert function may be NULL if the encoding is a single-byte
    478    encoding, that is if map[b] >= -1 for all bytes b.
    479 
    480    When the parser is finished with the encoding, then if release is
    481    not NULL, it will call release passing it the data member; once
    482    release has been called, the convert function will not be called
    483    again.
    484 
    485    Expat places certain restrictions on the encodings that are supported
    486    using this mechanism.
    487 
    488    1. Every ASCII character that can appear in a well-formed XML document,
    489       other than the characters
    490 
    491       $@\^`{}~
    492 
    493       must be represented by a single byte, and that byte must be the
    494       same byte that represents that character in ASCII.
    495 
    496    2. No character may require more than 4 bytes to encode.
    497 
    498    3. All characters encoded must have Unicode scalar values <=
    499       0xFFFF, (i.e., characters that would be encoded by surrogates in
    500       UTF-16 are  not allowed).  Note that this restriction doesn't
    501       apply to the built-in support for UTF-8 and UTF-16.
    502 
    503    4. No Unicode character may be encoded by more than one distinct
    504       sequence of bytes.
    505 */
    506 typedef struct {
    507   int map[256];
    508   void *data;
    509   int (XMLCALL *convert)(void *data, const char *s);
    510   void (XMLCALL *release)(void *data);
    511 } XML_Encoding;
    512 
    513 /* This is called for an encoding that is unknown to the parser.
    514 
    515    The encodingHandlerData argument is that which was passed as the
    516    second argument to XML_SetUnknownEncodingHandler.
    517 
    518    The name argument gives the name of the encoding as specified in
    519    the encoding declaration.
    520 
    521    If the callback can provide information about the encoding, it must
    522    fill in the XML_Encoding structure, and return XML_STATUS_OK.
    523    Otherwise it must return XML_STATUS_ERROR.
    524 
    525    If info does not describe a suitable encoding, then the parser will
    526    return an XML_UNKNOWN_ENCODING error.
    527 */
    528 typedef int (XMLCALL *XML_UnknownEncodingHandler) (
    529                                     void *encodingHandlerData,
    530                                     const XML_Char *name,
    531                                     XML_Encoding *info);
    532 
    533 XMLPARSEAPI(void)
    534 XML_SetElementHandler(XML_Parser parser,
    535                       XML_StartElementHandler start,
    536                       XML_EndElementHandler end);
    537 
    538 XMLPARSEAPI(void)
    539 XML_SetStartElementHandler(XML_Parser parser,
    540                            XML_StartElementHandler handler);
    541 
    542 XMLPARSEAPI(void)
    543 XML_SetEndElementHandler(XML_Parser parser,
    544                          XML_EndElementHandler handler);
    545 
    546 XMLPARSEAPI(void)
    547 XML_SetCharacterDataHandler(XML_Parser parser,
    548                             XML_CharacterDataHandler handler);
    549 
    550 XMLPARSEAPI(void)
    551 XML_SetProcessingInstructionHandler(XML_Parser parser,
    552                                     XML_ProcessingInstructionHandler handler);
    553 XMLPARSEAPI(void)
    554 XML_SetCommentHandler(XML_Parser parser,
    555                       XML_CommentHandler handler);
    556 
    557 XMLPARSEAPI(void)
    558 XML_SetCdataSectionHandler(XML_Parser parser,
    559                            XML_StartCdataSectionHandler start,
    560                            XML_EndCdataSectionHandler end);
    561 
    562 XMLPARSEAPI(void)
    563 XML_SetStartCdataSectionHandler(XML_Parser parser,
    564                                 XML_StartCdataSectionHandler start);
    565 
    566 XMLPARSEAPI(void)
    567 XML_SetEndCdataSectionHandler(XML_Parser parser,
    568                               XML_EndCdataSectionHandler end);
    569 
    570 /* This sets the default handler and also inhibits expansion of
    571    internal entities. These entity references will be passed to the
    572    default handler, or to the skipped entity handler, if one is set.
    573 */
    574 XMLPARSEAPI(void)
    575 XML_SetDefaultHandler(XML_Parser parser,
    576                       XML_DefaultHandler handler);
    577 
    578 /* This sets the default handler but does not inhibit expansion of
    579    internal entities.  The entity reference will not be passed to the
    580    default handler.
    581 */
    582 XMLPARSEAPI(void)
    583 XML_SetDefaultHandlerExpand(XML_Parser parser,
    584                             XML_DefaultHandler handler);
    585 
    586 XMLPARSEAPI(void)
    587 XML_SetDoctypeDeclHandler(XML_Parser parser,
    588                           XML_StartDoctypeDeclHandler start,
    589                           XML_EndDoctypeDeclHandler end);
    590 
    591 XMLPARSEAPI(void)
    592 XML_SetStartDoctypeDeclHandler(XML_Parser parser,
    593                                XML_StartDoctypeDeclHandler start);
    594 
    595 XMLPARSEAPI(void)
    596 XML_SetEndDoctypeDeclHandler(XML_Parser parser,
    597                              XML_EndDoctypeDeclHandler end);
    598 
    599 XMLPARSEAPI(void)
    600 XML_SetUnparsedEntityDeclHandler(XML_Parser parser,
    601                                  XML_UnparsedEntityDeclHandler handler);
    602 
    603 XMLPARSEAPI(void)
    604 XML_SetNotationDeclHandler(XML_Parser parser,
    605                            XML_NotationDeclHandler handler);
    606 
    607 XMLPARSEAPI(void)
    608 XML_SetNamespaceDeclHandler(XML_Parser parser,
    609                             XML_StartNamespaceDeclHandler start,
    610                             XML_EndNamespaceDeclHandler end);
    611 
    612 XMLPARSEAPI(void)
    613 XML_SetStartNamespaceDeclHandler(XML_Parser parser,
    614                                  XML_StartNamespaceDeclHandler start);
    615 
    616 XMLPARSEAPI(void)
    617 XML_SetEndNamespaceDeclHandler(XML_Parser parser,
    618                                XML_EndNamespaceDeclHandler end);
    619 
    620 XMLPARSEAPI(void)
    621 XML_SetNotStandaloneHandler(XML_Parser parser,
    622                             XML_NotStandaloneHandler handler);
    623 
    624 XMLPARSEAPI(void)
    625 XML_SetExternalEntityRefHandler(XML_Parser parser,
    626                                 XML_ExternalEntityRefHandler handler);
    627 
    628 /* If a non-NULL value for arg is specified here, then it will be
    629    passed as the first argument to the external entity ref handler
    630    instead of the parser object.
    631 */
    632 XMLPARSEAPI(void)
    633 XML_SetExternalEntityRefHandlerArg(XML_Parser parser,
    634                                    void *arg);
    635 
    636 XMLPARSEAPI(void)
    637 XML_SetSkippedEntityHandler(XML_Parser parser,
    638                             XML_SkippedEntityHandler handler);
    639 
    640 XMLPARSEAPI(void)
    641 XML_SetUnknownEncodingHandler(XML_Parser parser,
    642                               XML_UnknownEncodingHandler handler,
    643                               void *encodingHandlerData);
    644 
    645 /* This can be called within a handler for a start element, end
    646    element, processing instruction or character data.  It causes the
    647    corresponding markup to be passed to the default handler.
    648 */
    649 XMLPARSEAPI(void)
    650 XML_DefaultCurrent(XML_Parser parser);
    651 
    652 /* If do_nst is non-zero, and namespace processing is in effect, and
    653    a name has a prefix (i.e. an explicit namespace qualifier) then
    654    that name is returned as a triplet in a single string separated by
    655    the separator character specified when the parser was created: URI
    656    + sep + local_name + sep + prefix.
    657 
    658    If do_nst is zero, then namespace information is returned in the
    659    default manner (URI + sep + local_name) whether or not the name
    660    has a prefix.
    661 
    662    Note: Calling XML_SetReturnNSTriplet after XML_Parse or
    663      XML_ParseBuffer has no effect.
    664 */
    665 
    666 XMLPARSEAPI(void)
    667 XML_SetReturnNSTriplet(XML_Parser parser, int do_nst);
    668 
    669 /* This value is passed as the userData argument to callbacks. */
    670 XMLPARSEAPI(void)
    671 XML_SetUserData(XML_Parser parser, void *userData);
    672 
    673 /* Returns the last value set by XML_SetUserData or NULL. */
    674 #define XML_GetUserData(parser) (*(void **)(parser))
    675 
    676 /* This is equivalent to supplying an encoding argument to
    677    XML_ParserCreate. On success XML_SetEncoding returns non-zero,
    678    zero otherwise.
    679    Note: Calling XML_SetEncoding after XML_Parse or XML_ParseBuffer
    680      has no effect and returns XML_STATUS_ERROR.
    681 */
    682 XMLPARSEAPI(enum XML_Status)
    683 XML_SetEncoding(XML_Parser parser, const XML_Char *encoding);
    684 
    685 /* If this function is called, then the parser will be passed as the
    686    first argument to callbacks instead of userData.  The userData will
    687    still be accessible using XML_GetUserData.
    688 */
    689 XMLPARSEAPI(void)
    690 XML_UseParserAsHandlerArg(XML_Parser parser);
    691 
    692 /* If useDTD == XML_TRUE is passed to this function, then the parser
    693    will assume that there is an external subset, even if none is
    694    specified in the document. In such a case the parser will call the
    695    externalEntityRefHandler with a value of NULL for the systemId
    696    argument (the publicId and context arguments will be NULL as well).
    697    Note: For the purpose of checking WFC: Entity Declared, passing
    698      useDTD == XML_TRUE will make the parser behave as if the document
    699      had a DTD with an external subset.
    700    Note: If this function is called, then this must be done before
    701      the first call to XML_Parse or XML_ParseBuffer, since it will
    702      have no effect after that.  Returns
    703      XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING.
    704    Note: If the document does not have a DOCTYPE declaration at all,
    705      then startDoctypeDeclHandler and endDoctypeDeclHandler will not
    706      be called, despite an external subset being parsed.
    707    Note: If XML_DTD is not defined when Expat is compiled, returns
    708      XML_ERROR_FEATURE_REQUIRES_XML_DTD.
    709 */
    710 XMLPARSEAPI(enum XML_Error)
    711 XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD);
    712 
    713 
    714 /* Sets the base to be used for resolving relative URIs in system
    715    identifiers in declarations.  Resolving relative identifiers is
    716    left to the application: this value will be passed through as the
    717    base argument to the XML_ExternalEntityRefHandler,
    718    XML_NotationDeclHandler and XML_UnparsedEntityDeclHandler. The base
    719    argument will be copied.  Returns XML_STATUS_ERROR if out of memory,
    720    XML_STATUS_OK otherwise.
    721 */
    722 XMLPARSEAPI(enum XML_Status)
    723 XML_SetBase(XML_Parser parser, const XML_Char *base);
    724 
    725 XMLPARSEAPI(const XML_Char *)
    726 XML_GetBase(XML_Parser parser);
    727 
    728 /* Returns the number of the attribute/value pairs passed in last call
    729    to the XML_StartElementHandler that were specified in the start-tag
    730    rather than defaulted. Each attribute/value pair counts as 2; thus
    731    this correspondds to an index into the atts array passed to the
    732    XML_StartElementHandler.
    733 */
    734 XMLPARSEAPI(int)
    735 XML_GetSpecifiedAttributeCount(XML_Parser parser);
    736 
    737 /* Returns the index of the ID attribute passed in the last call to
    738    XML_StartElementHandler, or -1 if there is no ID attribute.  Each
    739    attribute/value pair counts as 2; thus this correspondds to an
    740    index into the atts array passed to the XML_StartElementHandler.
    741 */
    742 XMLPARSEAPI(int)
    743 XML_GetIdAttributeIndex(XML_Parser parser);
    744 
    745 #ifdef XML_ATTR_INFO
    746 /* Source file byte offsets for the start and end of attribute names and values.
    747    The value indices are exclusive of surrounding quotes; thus in a UTF-8 source
    748    file an attribute value of "blah" will yield:
    749    info->valueEnd - info->valueStart = 4 bytes.
    750 */
    751 typedef struct {
    752   XML_Index  nameStart;  /* Offset to beginning of the attribute name. */
    753   XML_Index  nameEnd;    /* Offset after the attribute name's last byte. */
    754   XML_Index  valueStart; /* Offset to beginning of the attribute value. */
    755   XML_Index  valueEnd;   /* Offset after the attribute value's last byte. */
    756 } XML_AttrInfo;
    757 
    758 /* Returns an array of XML_AttrInfo structures for the attribute/value pairs
    759    passed in last call to the XML_StartElementHandler that were specified
    760    in the start-tag rather than defaulted. Each attribute/value pair counts
    761    as 1; thus the number of entries in the array is
    762    XML_GetSpecifiedAttributeCount(parser) / 2.
    763 */
    764 XMLPARSEAPI(const XML_AttrInfo *)
    765 XML_GetAttributeInfo(XML_Parser parser);
    766 #endif
    767 
    768 /* Parses some input. Returns XML_STATUS_ERROR if a fatal error is
    769    detected.  The last call to XML_Parse must have isFinal true; len
    770    may be zero for this call (or any other).
    771 
    772    Though the return values for these functions has always been
    773    described as a Boolean value, the implementation, at least for the
    774    1.95.x series, has always returned exactly one of the XML_Status
    775    values.
    776 */
    777 XMLPARSEAPI(enum XML_Status)
    778 XML_Parse(XML_Parser parser, const char *s, int len, int isFinal);
    779 
    780 XMLPARSEAPI(void *)
    781 XML_GetBuffer(XML_Parser parser, int len);
    782 
    783 XMLPARSEAPI(enum XML_Status)
    784 XML_ParseBuffer(XML_Parser parser, int len, int isFinal);
    785 
    786 /* Stops parsing, causing XML_Parse() or XML_ParseBuffer() to return.
    787    Must be called from within a call-back handler, except when aborting
    788    (resumable = 0) an already suspended parser. Some call-backs may
    789    still follow because they would otherwise get lost. Examples:
    790    - endElementHandler() for empty elements when stopped in
    791      startElementHandler(),
    792    - endNameSpaceDeclHandler() when stopped in endElementHandler(),
    793    and possibly others.
    794 
    795    Can be called from most handlers, including DTD related call-backs,
    796    except when parsing an external parameter entity and resumable != 0.
    797    Returns XML_STATUS_OK when successful, XML_STATUS_ERROR otherwise.
    798    Possible error codes:
    799    - XML_ERROR_SUSPENDED: when suspending an already suspended parser.
    800    - XML_ERROR_FINISHED: when the parser has already finished.
    801    - XML_ERROR_SUSPEND_PE: when suspending while parsing an external PE.
    802 
    803    When resumable != 0 (true) then parsing is suspended, that is,
    804    XML_Parse() and XML_ParseBuffer() return XML_STATUS_SUSPENDED.
    805    Otherwise, parsing is aborted, that is, XML_Parse() and XML_ParseBuffer()
    806    return XML_STATUS_ERROR with error code XML_ERROR_ABORTED.
    807 
    808    *Note*:
    809    This will be applied to the current parser instance only, that is, if
    810    there is a parent parser then it will continue parsing when the
    811    externalEntityRefHandler() returns. It is up to the implementation of
    812    the externalEntityRefHandler() to call XML_StopParser() on the parent
    813    parser (recursively), if one wants to stop parsing altogether.
    814 
    815    When suspended, parsing can be resumed by calling XML_ResumeParser().
    816 */
    817 XMLPARSEAPI(enum XML_Status)
    818 XML_StopParser(XML_Parser parser, XML_Bool resumable);
    819 
    820 /* Resumes parsing after it has been suspended with XML_StopParser().
    821    Must not be called from within a handler call-back. Returns same
    822    status codes as XML_Parse() or XML_ParseBuffer().
    823    Additional error code XML_ERROR_NOT_SUSPENDED possible.
    824 
    825    *Note*:
    826    This must be called on the most deeply nested child parser instance
    827    first, and on its parent parser only after the child parser has finished,
    828    to be applied recursively until the document entity's parser is restarted.
    829    That is, the parent parser will not resume by itself and it is up to the
    830    application to call XML_ResumeParser() on it at the appropriate moment.
    831 */
    832 XMLPARSEAPI(enum XML_Status)
    833 XML_ResumeParser(XML_Parser parser);
    834 
    835 enum XML_Parsing {
    836   XML_INITIALIZED,
    837   XML_PARSING,
    838   XML_FINISHED,
    839   XML_SUSPENDED
    840 };
    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,
    873                                const XML_Char *context,
    874                                const XML_Char *encoding);
    875 
    876 enum XML_ParamEntityParsing {
    877   XML_PARAM_ENTITY_PARSING_NEVER,
    878   XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE,
    879   XML_PARAM_ENTITY_PARSING_ALWAYS
    880 };
    881 
    882 /* Controls parsing of parameter entities (including the external DTD
    883    subset). If parsing of parameter entities is enabled, then
    884    references to external parameter entities (including the external
    885    DTD subset) will be passed to the handler set with
    886    XML_SetExternalEntityRefHandler.  The context passed will be 0.
    887 
    888    Unlike external general entities, external parameter entities can
    889    only be parsed synchronously.  If the external parameter entity is
    890    to be parsed, it must be parsed during the call to the external
    891    entity ref handler: the complete sequence of
    892    XML_ExternalEntityParserCreate, XML_Parse/XML_ParseBuffer and
    893    XML_ParserFree calls must be made during this call.  After
    894    XML_ExternalEntityParserCreate has been called to create the parser
    895    for the external parameter entity (context must be 0 for this
    896    call), it is illegal to make any calls on the old parser until
    897    XML_ParserFree has been called on the newly created parser.
    898    If the library has been compiled without support for parameter
    899    entity parsing (ie without XML_DTD being defined), then
    900    XML_SetParamEntityParsing will return 0 if parsing of parameter
    901    entities is requested; otherwise it will return non-zero.
    902    Note: If XML_SetParamEntityParsing is called after XML_Parse or
    903       XML_ParseBuffer, then it has no effect and will always 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 */
    914 XMLPARSEAPI(int)
    915 XML_SetHashSalt(XML_Parser parser,
    916                 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 XMLPARSEAPI(XML_Size) XML_GetCurrentLineNumber(XML_Parser parser);
    941 XMLPARSEAPI(XML_Size) XML_GetCurrentColumnNumber(XML_Parser parser);
    942 XMLPARSEAPI(XML_Index) XML_GetCurrentByteIndex(XML_Parser parser);
    943 
    944 /* Return the number of bytes in the current event.
    945    Returns 0 if the event is in an internal entity.
    946 */
    947 XMLPARSEAPI(int)
    948 XML_GetCurrentByteCount(XML_Parser parser);
    949 
    950 /* If XML_CONTEXT_BYTES is defined, returns the input buffer, sets
    951    the integer pointed to by offset to the offset within this buffer
    952    of the current parse position, and sets the integer pointed to by size
    953    to the size of this buffer (the number of input bytes). Otherwise
    954    returns a NULL pointer. Also returns a NULL pointer if a parse isn't
    955    active.
    956 
    957    NOTE: The character pointer returned should not be used outside
    958    the handler that makes the call.
    959 */
    960 XMLPARSEAPI(const char *)
    961 XML_GetInputContext(XML_Parser parser,
    962                     int *offset,
    963                     int *size);
    964 
    965 /* For backwards compatibility with previous versions. */
    966 #define XML_GetErrorLineNumber   XML_GetCurrentLineNumber
    967 #define XML_GetErrorColumnNumber XML_GetCurrentColumnNumber
    968 #define XML_GetErrorByteIndex    XML_GetCurrentByteIndex
    969 
    970 /* Frees the content model passed to the element declaration handler */
    971 XMLPARSEAPI(void)
    972 XML_FreeContentModel(XML_Parser parser, XML_Content *model);
    973 
    974 /* Exposing the memory handling functions used in Expat */
    975 XMLPARSEAPI(void *)
    976 XML_MemMalloc(XML_Parser parser, size_t size);
    977 
    978 XMLPARSEAPI(void *)
    979 XML_MemRealloc(XML_Parser parser, void *ptr, size_t size);
    980 
    981 XMLPARSEAPI(void)
    982 XML_MemFree(XML_Parser parser, void *ptr);
    983 
    984 /* Frees memory used by the parser. */
    985 XMLPARSEAPI(void)
    986 XML_ParserFree(XML_Parser parser);
    987 
    988 /* Returns a string describing the error. */
    989 XMLPARSEAPI(const XML_LChar *)
    990 XML_ErrorString(enum XML_Error code);
    991 
    992 /* Return a string containing the version number of this expat */
    993 XMLPARSEAPI(const XML_LChar *)
    994 XML_ExpatVersion(void);
    995 
    996 typedef struct {
    997   int major;
    998   int minor;
    999   int micro;
   1000 } XML_Expat_Version;
   1001 
   1002 /* Return an XML_Expat_Version structure containing numeric version
   1003    number information for this version of expat.
   1004 */
   1005 XMLPARSEAPI(XML_Expat_Version)
   1006 XML_ExpatVersionInfo(void);
   1007 
   1008 /* Added in Expat 1.95.5. */
   1009 enum XML_FeatureEnum {
   1010   XML_FEATURE_END = 0,
   1011   XML_FEATURE_UNICODE,
   1012   XML_FEATURE_UNICODE_WCHAR_T,
   1013   XML_FEATURE_DTD,
   1014   XML_FEATURE_CONTEXT_BYTES,
   1015   XML_FEATURE_MIN_SIZE,
   1016   XML_FEATURE_SIZEOF_XML_CHAR,
   1017   XML_FEATURE_SIZEOF_XML_LCHAR,
   1018   XML_FEATURE_NS,
   1019   XML_FEATURE_LARGE_SIZE,
   1020   XML_FEATURE_ATTR_INFO
   1021   /* Additional features must be added to the end of this enum. */
   1022 };
   1023 
   1024 typedef struct {
   1025   enum XML_FeatureEnum  feature;
   1026   const XML_LChar       *name;
   1027   long int              value;
   1028 } XML_Feature;
   1029 
   1030 XMLPARSEAPI(const XML_Feature *)
   1031 XML_GetFeatureList(void);
   1032 
   1033 
   1034 /* Expat follows the GNU/Linux convention of odd number minor version for
   1035    beta/development releases and even number minor version for stable
   1036    releases. Micro is bumped with each release, and set to 0 with each
   1037    change to major or minor version.
   1038 */
   1039 #define XML_MAJOR_VERSION 2
   1040 #define XML_MINOR_VERSION 1
   1041 #define XML_MICRO_VERSION 1
   1042 
   1043 #ifdef __cplusplus
   1044 }
   1045 #endif
   1046 
   1047 #endif /* not Expat_INCLUDED */
   1048