/* -*- Mode: c; c-basic-offset: 2 -*-
 *
 * raptor.h - Redland Parser Toolkit for RDF (Raptor) interfaces and definition
 *
 * Copyright (C) 2000-2008, David Beckett http://www.dajobe.org/
 * Copyright (C) 2000-2005, University of Bristol, UK http://www.bristol.ac.uk/
 * 
 * This package is Free Software and part of Redland http://librdf.org/
 * 
 * It is licensed under the following three licenses as alternatives:
 *   1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
 *   2. GNU General Public License (GPL) V2 or any newer version
 *   3. Apache License, V2.0 or any newer version
 * 
 * You may not use this file except in compliance with at least one of
 * the above three licenses.
 * 
 * See LICENSE.html or LICENSE.txt at the top of this package for the
 * complete terms and further detail along with the license texts for
 * the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
 * 
 * 
 */



#ifndef RAPTOR_H
#define RAPTOR_H


#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>

/* Required for va_list in raptor_vsnprintf */
#include <stdarg.h>


/**
 * RAPTOR_API:
 *
 * Macro for wrapping API function call declarations.
 *
 */
#ifndef RAPTOR_API
#  ifdef WIN32
#    ifdef __GNUC__
#      undef _declspec
#      define _declspec(x) __declspec(x)
#    endif
#    ifdef RAPTOR_STATIC
#      define RAPTOR_API
#    else
#      ifdef RAPTOR_INTERNAL
#        define RAPTOR_API _declspec(dllexport)
#      else
#        define RAPTOR_API _declspec(dllimport)
#      endif
#    endif
#  else
#    define RAPTOR_API
#  endif
#endif

/* Use gcc 3.1+ feature to allow marking of deprecated API calls.
 * This gives a warning during compiling.
 */
#if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
#ifdef __APPLE_CC__
/* OSX gcc cpp-precomp is broken */
#define RAPTOR_DEPRECATED
#else
#define RAPTOR_DEPRECATED __attribute__((deprecated))
#endif
#else
#define RAPTOR_DEPRECATED
#endif

/**
 * RAPTOR_V2_EXPERIMENTAL:
 *
 * Enable EXPERIMENTAL and UNSUPPORTED API v2 structs and functions
 *
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 *
 *   The v2 structs and raptor*_v2() functions are NOT supported.
 *
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 */
#undef RAPTOR_V2_AVAILABLE
#ifdef RAPTOR_V2_EXPERIMENTAL
#define RAPTOR_V2_AVAILABLE 1
#endif

/* Allow to flag V1 functions as deprecated */
#ifndef RAPTOR_V1
#define RAPTOR_V1
#endif

/**
 * RAPTOR_PRINTF_FORMAT:
 * @string_index: ignore me
 * @first_to_check_index: ignore me
 *
 * Internal macro
 */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
#define RAPTOR_PRINTF_FORMAT(string_index, first_to_check_index) \
  __attribute__((__format__(__printf__, string_index, first_to_check_index)))
#else
#define RAPTOR_PRINTF_FORMAT(string_index, first_to_check_index)
#endif

/**
 * raptor_uri:
 *
 * Raptor URI Class.
 */
typedef void* raptor_uri;


/* Public statics */
RAPTOR_API
extern const char * const raptor_short_copyright_string;
RAPTOR_API
extern const char * const raptor_copyright_string;
RAPTOR_API
extern const char * const raptor_version_string;
RAPTOR_API
extern const unsigned int raptor_version_major;
RAPTOR_API
extern const unsigned int raptor_version_minor;
RAPTOR_API
extern const unsigned int raptor_version_release;
RAPTOR_API
extern const unsigned int raptor_version_decimal;
RAPTOR_API
extern const char * const raptor_license_string;
RAPTOR_API
extern const char * const raptor_home_url_string;

RAPTOR_API
extern const unsigned char * const raptor_xml_namespace_uri;
RAPTOR_API
extern const unsigned char * const raptor_rdf_namespace_uri;
RAPTOR_API
extern const unsigned char * const raptor_rdf_schema_namespace_uri;
RAPTOR_API
extern const unsigned char * const raptor_xmlschema_datatypes_namespace_uri;
RAPTOR_API
extern const unsigned char * const raptor_owl_namespace_uri;

/**
 * raptor_rdf_namespace_uri_len:
 *
 * Length of #raptor_rdf_namespace_uri string
 */
RAPTOR_API
extern const unsigned int raptor_rdf_namespace_uri_len;

RAPTOR_API
extern const unsigned char * const raptor_xml_literal_datatype_uri_string;

/**
 * raptor_xml_literal_datatype_uri_string_len:
 *
 * Length of #raptor_xml_literal_datatype_uri_string
 */
RAPTOR_API
extern const unsigned int raptor_xml_literal_datatype_uri_string_len;


/* Public structure */
#ifndef RAPTOR_WORLD_DECLARED
#define RAPTOR_WORLD_DECLARED 1
/**
 * raptor_world:
 *
 * Raptor world class.
 */
typedef struct raptor_world_s raptor_world;
#endif
/**
 * raptor_parser:
 *
 * Raptor Parser class
 */
typedef struct raptor_parser_s raptor_parser;
/**
 * raptor_serializer:
 *
 * Raptor Serializer class
 */
typedef struct raptor_serializer_s raptor_serializer;

/**
 * raptor_www:
 *
 * Raptor WWW class
 */
typedef struct raptor_www_s raptor_www;
/**
 * raptor_iostream:
 *
 * Raptor I/O Stream class
 */
typedef struct raptor_iostream_s raptor_iostream;
/**
 * raptor_xml_element:
 *
 * Raptor XML Element class
 */
typedef struct raptor_xml_element_s raptor_xml_element;
/**
 * raptor_xml_writer:
 *
 * Raptor XML Writer class
 */
typedef struct raptor_xml_writer_s raptor_xml_writer;
/**
 * raptor_qname:
 *
 * Raptor XML qname class
 */
typedef struct raptor_qname_s raptor_qname;
/**
 * raptor_namespace:
 *
 * Raptor XML Namespace class
 */
typedef struct raptor_namespace_s raptor_namespace;
/**
 * raptor_namespace_stack:
 *
 * Raptor XML Namespace Stack class
 */
typedef struct raptor_namespace_stack_s raptor_namespace_stack;

/**
 * raptor_ntriples_parser:
 *
 * @Deprecated: use #raptor_parser.
 *
 * old structure - use #raptor_parser instead.
*/
typedef raptor_parser raptor_ntriples_parser;

/**
 * raptor_sax2:
 *
 * Raptor SAX2 class
 */
typedef struct raptor_sax2_s raptor_sax2;


/**
 * raptor_identifier_type:
 * @RAPTOR_IDENTIFIER_TYPE_RESOURCE:    Resource URI (e.g. <literal>rdf:about</literal>)
 * @RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:   <literal>_:foo</literal> N-Triples, or generated
 * @RAPTOR_IDENTIFIER_TYPE_PREDICATE:   predicate URI.  WARNING: Will not be generated in in Raptor 1.4.9 or newer.  Instead a #RAPTOR_IDENTIFIER_TYPE_RESOURCE will be returned.
 * @RAPTOR_IDENTIFIER_TYPE_ORDINAL:     <literal>rdf:li</literal>, <literal>rdf:_</literal><emphasis>n</emphasis>.  No longer generated in any parser in Raptor 1.4.10+, instead a #RAPTOR_IDENTIFIER_TYPE_RESOURCE is returned.
 * @RAPTOR_IDENTIFIER_TYPE_LITERAL:     regular literal
 * @RAPTOR_IDENTIFIER_TYPE_XML_LITERAL: <literal>rdf:parseType="Literal"</literal>.  No longer generated by any parser in Raptor 1.4.8+, instead a #RAPTOR_IDENTIFIER_TYPE_LITERAL is returned with a datatype of <literal>rdf:XMLLiteral</literal>.
 * @RAPTOR_IDENTIFIER_TYPE_UNKNOWN:     Internal
 *
 * Type of identifier in a #raptor_statement
 *
 */
typedef enum {
  RAPTOR_IDENTIFIER_TYPE_UNKNOWN,
  RAPTOR_IDENTIFIER_TYPE_RESOURCE,
  RAPTOR_IDENTIFIER_TYPE_ANONYMOUS,
  RAPTOR_IDENTIFIER_TYPE_PREDICATE,
  RAPTOR_IDENTIFIER_TYPE_ORDINAL,
  RAPTOR_IDENTIFIER_TYPE_LITERAL,
  RAPTOR_IDENTIFIER_TYPE_XML_LITERAL
} raptor_identifier_type;


/**
 * raptor_uri_source:
 * @RAPTOR_URI_SOURCE_UNKNOWN: Internal
 * @RAPTOR_URI_SOURCE_NOT_URI: Internal
 * @RAPTOR_URI_SOURCE_ELEMENT: Internal
 * @RAPTOR_URI_SOURCE_ATTRIBUTE: Internal
 * @RAPTOR_URI_SOURCE_ID: Internal
 * @RAPTOR_URI_SOURCE_URI: Internal
 * @RAPTOR_URI_SOURCE_GENERATED: Internal
 * @RAPTOR_URI_SOURCE_BLANK_ID: Internal
 *
 * Internal: Where a URI or identifier was derived from
 *
 * Likely to be deprecated in future releases.
 */

typedef enum { RAPTOR_URI_SOURCE_UNKNOWN, RAPTOR_URI_SOURCE_NOT_URI, RAPTOR_URI_SOURCE_ELEMENT, RAPTOR_URI_SOURCE_ATTRIBUTE, RAPTOR_URI_SOURCE_ID, RAPTOR_URI_SOURCE_URI, RAPTOR_URI_SOURCE_GENERATED, RAPTOR_URI_SOURCE_BLANK_ID } raptor_uri_source;

/**
 * raptor_ntriples_term_type:
 * @RAPTOR_NTRIPLES_TERM_TYPE_URI_REF: Internal
 * @RAPTOR_NTRIPLES_TERM_TYPE_BLANK_NODE: Internal
 * @RAPTOR_NTRIPLES_TERM_TYPE_LITERAL: I
 *
 * N-Triples term types
 * 
 * Used for the deprecated function raptor_ntriples_term_as_string() only.
 *
 */
typedef enum { RAPTOR_NTRIPLES_TERM_TYPE_URI_REF, RAPTOR_NTRIPLES_TERM_TYPE_BLANK_NODE, RAPTOR_NTRIPLES_TERM_TYPE_LITERAL } raptor_ntriples_term_type;


/**
 * raptor_locator:
 * @uri: URI of location (or NULL)
 * @file: Filename of location (or NULL)
 * @line: Line number of location (or <0 for no line)
 * @column: Column number of location (or <0 for no column)
 * @byte: Byte number of location (or <0 for no byte)
 *
 * Location information for an error, warning or information message.
 */
typedef struct {
  raptor_uri *uri;
  const char *file;
  int line;
  int column;
  int byte;  
} raptor_locator;

/**
 * raptor_feature:
 * @RAPTOR_FEATURE_SCANNING: If true (default false), the RDF/XML
 *   parser will look for embedded rdf:RDF elements inside the XML
 *   content, and not require that the XML start with an rdf:RDF root
 *   element.
 * @RAPTOR_FEATURE_ASSUME_IS_RDF: If true (default false) then the
 *   RDF/XML parser will assume the content is RDF/XML, not require
 *   that rdf:RDF root element, and immediately interpret the content
 *   as RDF/XML.
 * @RAPTOR_FEATURE_ALLOW_NON_NS_ATTRIBUTES: If true (default true)
 *   then the RDF/XML parser will allow non-XML namespaced attributes
 *   to be accepted as well as rdf: namespaced ones.  For example,
 *   'about' and 'ID' will be interpreted as if they were rdf:about
 *   and rdf:ID respectively.
 * @RAPTOR_FEATURE_ALLOW_OTHER_PARSETYPES: If true (default true)
 *   then the RDF/XML parser will allow unknown parsetypes to be
 *   present and will pass them on to the user.  Unimplemented at
 *   present.
 * @RAPTOR_FEATURE_ALLOW_BAGID: If true (default true) then the
 *   RDF/XML parser will support the rdf:bagID attribute that was
 *   removed from the RDF/XML language when it was revised.  This
 *   support may be removed in future.
 * @RAPTOR_FEATURE_ALLOW_RDF_TYPE_RDF_LIST: If true (default false)
 *   then the RDF/XML parser will generate the idList rdf:type
 *   rdf:List triple in the handling of rdf:parseType="Collection".
 *   This triple was removed during the revising of RDF/XML after
 *   collections were initially added.
 * @RAPTOR_FEATURE_NORMALIZE_LANGUAGE: If true (default true) then
 *   XML language values such as from xml:lang will be normalized to
 *   lowercase.
 * @RAPTOR_FEATURE_NON_NFC_FATAL: If true (default false) then
 *  illegal Unicode Normal Form C in literals will give a fatal
 *  error, otherwise just a warning.
 * @RAPTOR_FEATURE_WARN_OTHER_PARSETYPES: If true (default true) then 
 *   the RDF/XML parser will warn about unknown rdf:parseType values.
 * @RAPTOR_FEATURE_CHECK_RDF_ID: If true (default true) then the
 *   RDF/XML will check rdf:ID attribute values for duplicates and
 *   cause an error if any are found.
 * @RAPTOR_FEATURE_RELATIVE_URIS: If true (default true) then
 *   relative URIs will be used wherever possible when serializing.
 * @RAPTOR_FEATURE_START_URI: Set the start URI for serlalizing to use.
 * @RAPTOR_FEATURE_WRITER_AUTO_INDENT: Automatically indent elements when
 *   seriailizing.
 * @RAPTOR_FEATURE_WRITER_AUTO_EMPTY: Automatically detect and
 *   abbreviate empty elements when serializing.
 * @RAPTOR_FEATURE_WRITER_INDENT_WIDTH: Integer number of spaces to use
 *   for each indent level when serializing with auto indent.
 * @RAPTOR_FEATURE_WRITER_XML_VERSION: Integer XML version XML 1.0 (10) or XML 1.1 (11)
 * @RAPTOR_FEATURE_WRITER_XML_DECLARATION: Write XML 1.0 or 1.1 declaration.
 * @RAPTOR_FEATURE_NO_NET: Deny network requests.
 * @RAPTOR_FEATURE_RESOURCE_BORDER: Border color of resource
 *   nodes for GraphViz DOT serializer.
 * @RAPTOR_FEATURE_LITERAL_BORDER: Border color of literal nodes
 *   for GraphViz DOT serializer.
 * @RAPTOR_FEATURE_BNODE_BORDER: Border color of blank nodes for
 *   GraphViz DOT serializer.
 * @RAPTOR_FEATURE_RESOURCE_FILL: Fill color of resource nodes
 *   for GraphViz DOT serializer.
 * @RAPTOR_FEATURE_LITERAL_FILL: Fill color of literal nodes for
 *   GraphViz DOT serializer.
 * @RAPTOR_FEATURE_BNODE_FILL: Fill color of blank nodes for
 *   GraphViz DOT serializer.
 * @RAPTOR_FEATURE_HTML_TAG_SOUP: Use a lax HTML parser if an XML parser
 *   fails when read HTML for GRDDL parser.
 * @RAPTOR_FEATURE_MICROFORMATS: Look for microformats for GRDDL parser.
 * @RAPTOR_FEATURE_HTML_LINK: Look for head &lt;link&gt; to type rdf/xml
 *   for GRDDL parser.
 * @RAPTOR_FEATURE_WWW_TIMEOUT: Set timeout for internal WWW URI requests
 *   for GRDDL parser.
 * @RAPTOR_FEATURE_WRITE_BASE_URI: Write @base directive for Turtle/N3.
 * @RAPTOR_FEATURE_WWW_HTTP_CACHE_CONTROL: HTTP Cache-Control: header
 * @RAPTOR_FEATURE_WWW_HTTP_USER_AGENT: HTTP User-Agent: header
 * @RAPTOR_FEATURE_JSON_CALLBACK: JSON serializer callback function.
 * @RAPTOR_FEATURE_JSON_EXTRA_DATA: JSON serializer extra top-level data
 * @RAPTOR_FEATURE_RSS_TRIPLES: Atom/RSS serializer writes extra RDF triples it finds (none, rdf-xml, atom-triples)
 * @RAPTOR_FEATURE_ATOM_ENTRY_URI: Atom entry URI.  If given, generate an Atom Entry Document with the item having the given URI, otherwise generate an Atom Feed Document with any items found.
 * @RAPTOR_FEATURE_PREFIX_ELEMENTS: Integer. If set, generate Atom/RSS1.0 documents with prefixed elements, otherwise unprefixed.
 * @RAPTOR_FEATURE_LAST: Internal
 *
 * Raptor parser, serializer or XML writer features.
 */
typedef enum {
  RAPTOR_FEATURE_SCANNING,
  RAPTOR_FEATURE_ASSUME_IS_RDF,
  RAPTOR_FEATURE_ALLOW_NON_NS_ATTRIBUTES,
  RAPTOR_FEATURE_ALLOW_OTHER_PARSETYPES,
  RAPTOR_FEATURE_ALLOW_BAGID,
  RAPTOR_FEATURE_ALLOW_RDF_TYPE_RDF_LIST,
  RAPTOR_FEATURE_NORMALIZE_LANGUAGE,
  RAPTOR_FEATURE_NON_NFC_FATAL,
  RAPTOR_FEATURE_WARN_OTHER_PARSETYPES,
  RAPTOR_FEATURE_CHECK_RDF_ID,
  RAPTOR_FEATURE_RELATIVE_URIS,
  RAPTOR_FEATURE_START_URI,
  RAPTOR_FEATURE_WRITER_AUTO_INDENT,
  RAPTOR_FEATURE_WRITER_AUTO_EMPTY,
  RAPTOR_FEATURE_WRITER_INDENT_WIDTH,
  RAPTOR_FEATURE_WRITER_XML_VERSION,
  RAPTOR_FEATURE_WRITER_XML_DECLARATION,
  RAPTOR_FEATURE_NO_NET,
  RAPTOR_FEATURE_RESOURCE_BORDER,
  RAPTOR_FEATURE_LITERAL_BORDER,
  RAPTOR_FEATURE_BNODE_BORDER,
  RAPTOR_FEATURE_RESOURCE_FILL,
  RAPTOR_FEATURE_LITERAL_FILL,
  RAPTOR_FEATURE_BNODE_FILL,
  RAPTOR_FEATURE_HTML_TAG_SOUP,
  RAPTOR_FEATURE_MICROFORMATS,
  RAPTOR_FEATURE_HTML_LINK,
  RAPTOR_FEATURE_WWW_TIMEOUT,
  RAPTOR_FEATURE_WRITE_BASE_URI,
  RAPTOR_FEATURE_WWW_HTTP_CACHE_CONTROL,
  RAPTOR_FEATURE_WWW_HTTP_USER_AGENT,
  RAPTOR_FEATURE_JSON_CALLBACK,
  RAPTOR_FEATURE_JSON_EXTRA_DATA,
  RAPTOR_FEATURE_RSS_TRIPLES,
  RAPTOR_FEATURE_ATOM_ENTRY_URI,
  RAPTOR_FEATURE_PREFIX_ELEMENTS,
  RAPTOR_FEATURE_LAST = RAPTOR_FEATURE_PREFIX_ELEMENTS
} raptor_feature;


/**
 * raptor_genid_type:
 * @RAPTOR_GENID_TYPE_BNODEID: Generated ID is for a blank node
 * @RAPTOR_GENID_TYPE_BAGID: Generated ID is for rdf:bagID
 *
 * Intended type for a generated identifier asked for by the handler
 * registered with raptor_set_generate_id_handler().
 */
typedef enum {
  RAPTOR_GENID_TYPE_BNODEID,
  RAPTOR_GENID_TYPE_BAGID
} raptor_genid_type;


/**
 * raptor_identifier:
 * @type: Type of identifier
 * @uri: URI of identifier for types %RAPTOR_IDENTIFIER_TYPE_RESOURCE and
 *   %RAPTOR_IDENTIFIER_TYPE_PREDICATE
 * @uri_source: where the identifier (URI or blank node) came from
 * @id: blank node identifier for type %RAPTOR_IDENTIFIER_TYPE_ANONYMOUS
 * @ordinal: integer ordinal for type %RAPTOR_IDENTIFIER_TYPE_ORDINAL
 * @is_malloced: internal
 * @literal: literal string for types %RAPTOR_IDENTIFIER_TYPE_LITERAL and
 *    %RAPTOR_IDENTIFIER_TYPE_XML_LITERAL
 * @literal_datatype: RDF literal datatype URI for types
 *   %RAPTOR_IDENTIFIER_TYPE_LITERAL and %RAPTOR_IDENTIFIER_TYPE_XML_LITERAL
 * @literal_language: RDF literal language for type
 *   %RAPTOR_IDENTIFIER_TYPE_LITERAL
 * @world: raptor_world object
 *
 * Raptor RDF term identifier.
*/
typedef struct {
  raptor_identifier_type type;
  raptor_uri *uri;
  raptor_uri_source uri_source;
  const unsigned char *id;
  int ordinal;
  int is_malloced;
  const unsigned char *literal;
  raptor_uri *literal_datatype;
  const unsigned char *literal_language;
  raptor_world *world;
} raptor_identifier;


/**
 * raptor_statement:
 * @subject: triple subject data
 * @subject_type: triple subject type
 * @predicate: triple predicate data
 * @predicate_type: triple predicate type
 * @object: triple object literal string
 * @object_type: triple object type
 * @object_literal_datatype: triple object literal datatype URI (or NULL)
 * @object_literal_language: triple object literal language string (or NULL)
 *
 * An RDF triple
 *
 * See #raptor_identifier for a description of how the fields may be used.
 * As returned by a parser statement_handler.
 *
 * See also #raptor_statement_v2.
 */
typedef struct {
  const void *subject;
  raptor_identifier_type subject_type;
  const void *predicate;
  raptor_identifier_type predicate_type;
  const void *object;
  raptor_identifier_type object_type;
  raptor_uri *object_literal_datatype;
  const unsigned char *object_literal_language;
} raptor_statement;


#ifdef RAPTOR_V2_AVAILABLE
/**
 * raptor_statement_v2:
 * @world: raptor_world object
 * @s: #raptor_statement
 *
 * An RDF triple wrapper for raptor v2 statement API.
 *
 * See #raptor_statement.
 */
typedef struct {
  raptor_world* world;
  raptor_statement *s;
} raptor_statement_v2;
#endif


/**
 * raptor_new_uri_func:
 * @context: URI context data
 * @uri_string: URI string
 *
 * Handler function for implementing raptor_new_uri().
 *
 * Return value: new URI object or NULL on failure
 */
typedef raptor_uri* (*raptor_new_uri_func) (void *context, const unsigned char *uri_string);

/**
 * raptor_new_uri_from_uri_local_name_func:
 * @context: URI context data
 * @uri: URI object
 * @local_name: local name string
 *
 * Handler function for implementing raptor_new_uri_from_uri_local_name().
 *
 * Return value: new URI object or NULL on failure
 */
typedef raptor_uri* (*raptor_new_uri_from_uri_local_name_func) (void *context, raptor_uri *uri, const unsigned char *local_name);

/**
 * raptor_new_uri_relative_to_base_func:
 * @context: URI context data
 * @base_uri: base URI object
 * @uri_string: relative URI string
 *
 * Handler function for implementing raptor_new_uri_relative_to_base().
 *
 * Return value: new URI object or NULL on failure
 */
typedef raptor_uri* (*raptor_new_uri_relative_to_base_func) (void *context, raptor_uri *base_uri, const unsigned char *uri_string);

/**
 * raptor_new_uri_for_rdf_concept_func:
 * @context: URI context data
 * @name: RDF term
 *
 * Handler function for implementing raptor_new_uri_for_rdf_concept().
 *
 * Return value: new URI object or NULL on failure
 */
typedef raptor_uri* (*raptor_new_uri_for_rdf_concept_func) (void *context, const char *name);

/**
 * raptor_free_uri_func:
 * @context: URI context data
 * @uri: URI object
 *
 * Handler function for implementing raptor_free_uri().
 */
typedef void (*raptor_free_uri_func) (void *context, raptor_uri *uri);

/**
 * raptor_uri_equals_func:
 * @context: URI context data
 * @uri1: URI object 1
 * @uri2: URI object 2
 *
 * Handler function for implementing raptor_uri_equals().
 *
 * Return value: non-0 if the URIs are equal
 */
typedef int (*raptor_uri_equals_func) (void *context, raptor_uri* uri1, raptor_uri* uri2);

/**
 * raptor_uri_compare_func:
 * @context: URI context data
 * @uri1: URI object 1
 * @uri2: URI object 2
 *
 * Handler function for implementing raptor_uri_equals().
 *
 * Return value: -1 if uri1 < uri2, 0 if equal, 1 if uri1 > uri2
 */
typedef int (*raptor_uri_compare_func) (void *context, raptor_uri* uri1, raptor_uri* uri2);

/**
 * raptor_uri_copy_func:
 * @context: URI context data
 * @uri: URI object
 *
 * Handler function for implementing raptor_uri_copy().
 *
 * Return value: new URI object or NULL on failure
 */
typedef raptor_uri* (*raptor_uri_copy_func) (void *context, raptor_uri *uri);

/**
 * raptor_uri_as_string_func:
 * @context: URI context data
 * @uri: URI object
 *
 * Handler function for implementing raptor_uri_as_string().
 *
 * Return value: shared string representation of the URI
 */
typedef unsigned char* (*raptor_uri_as_string_func)(void *context, raptor_uri *uri);

/**
 * raptor_uri_as_counted_string_func:
 * @context: URI context data
 * @uri: URI object
 * @len_p: length
 *
 * Handler function for implementing raptor_uri_as_counted_string().
 *
 * Return value: shared string representation of the URI
 */
typedef unsigned char* (*raptor_uri_as_counted_string_func)(void *context, raptor_uri *uri, size_t* len_p);


/**
 * raptor_uri_handler:
 * @new_uri: function for raptor_new_uri()
 * @new_uri_from_uri_local_name: function for raptor_new_uri_from_uri_local_name()
 * @new_uri_relative_to_base: function for raptor_new_uri_relative_to_base()
 * @new_uri_for_rdf_concept: function for raptor_new_uri_for_rdf_concept()
 * @free_uri: function for raptor_free_uri()
 * @uri_equals: function for raptor_uri_equals()
 * @uri_compare: function for raptor_uri_compare()
 * @uri_copy: function for raptor_uri_copy()
 * @uri_as_string: function for raptor_uri_as_string()
 * @uri_as_counted_string: function for raptor_uri_as_counted_string()
 * @initialised: API version - set to API version implemented: 1..2
 *
 * URI implementation handler structure.
 */
typedef struct {
  /* constructors - URI Interface V1 */
  raptor_new_uri_func                     new_uri;
  raptor_new_uri_from_uri_local_name_func new_uri_from_uri_local_name;
  raptor_new_uri_relative_to_base_func    new_uri_relative_to_base;
  raptor_new_uri_for_rdf_concept_func     new_uri_for_rdf_concept;
  /* destructor - URI Interface V1 */
  raptor_free_uri_func                    free_uri;
  /* methods - URI Interface V1 */
  raptor_uri_equals_func                  uri_equals;
  raptor_uri_copy_func                    uri_copy; /* well, copy constructor */
  raptor_uri_as_string_func               uri_as_string;
  raptor_uri_as_counted_string_func       uri_as_counted_string;
  int initialised;
  /* methods - URI Interface V2 */
  raptor_uri_compare_func                 uri_compare;
} raptor_uri_handler;


/**
 * raptor_simple_message_handler:
 * @user_data: user data
 * @message: message to report
 * @...: arguments for message
 *
 * Simple message handler function.
 *
 * Used by multiple functions including raptor_xml_escape_string(),
 * raptor_iostream_write_xml_escaped_string(), raptor_new_qname(),
 * raptor_qname_string_to_uri(), raptor_new_namespaces(),
 * raptor_namespaces_init(), raptor_iostream_write_xml_element(),
 * raptor_new_xml_writer().
 */
typedef void (*raptor_simple_message_handler)(void *user_data, const char *message, ...);

/**
 * raptor_message_handler:
 * @user_data: user data
 * @locator: location associated with message or NULL
 * @message: message to report
 *
 * Message with location handler function.
 *
 * Used during parsing and serializing for errors and warnings that
 * may include location information. Multiple handlers may be set for
 * parsers and serializers by raptor_set_fatal_error_handler(),
 * raptor_set_error_handler(), raptor_set_warning_handler(),
 * raptor_serializer_set_error_handler() and
 * raptor_serializer_set_warning_handler().
 *
 * Also used by raptor_www_set_error_handler() for location-based errors
 * in WWW retrieval.
 */
typedef void (*raptor_message_handler)(void *user_data, raptor_locator* locator, const char *message);


/**
 * raptor_message_handler_closure:
 * @user_data: user data for handler invocation
 * @handler: handler function
 *
 * The combination of a message handler and the user data to send to it.
 */
typedef struct {
  void *user_data;
  raptor_message_handler handler;
} raptor_message_handler_closure;


/**
 * raptor_statement_handler:
 * @user_data: user data
 * @statement: statement to report
 *
 * Statement (triple) reporting handler function.
 */
typedef void (*raptor_statement_handler)(void *user_data, const raptor_statement *statement);

/**
 * raptor_graph_handler:
 * @user_data: user data
 * @graph: graph to report, 0 for the default graph
 *
 * Named graph reporting handler function. Due to historic reasons the named graph
 * API is separated from the statement handler. A graph is reported after all its 
 * statements.
 */
typedef void (*raptor_graph_handler)(void *user_data, raptor_uri *graph);

/**
 * raptor_generate_id_handler:
 * @user_data: user data
 * @type: type of ID to create
 * @user_bnodeid: a user-specified ID or NULL if none available.
 *
 * Generate an identifier handler function.
 *
 * Return value: new ID to use
 */
typedef unsigned char* (*raptor_generate_id_handler)(void *user_data, raptor_genid_type type, unsigned char* user_bnodeid);

/**
 * raptor_namespace_handler:
 * @user_data: user data
 * @nspace: #raptor_namespace declared
 *
 * XML Namespace declaration reporting handler set by 
 * raptor_set_namespace_handler().
 */
typedef void (*raptor_namespace_handler)(void* user_data, raptor_namespace *nspace);

/**
 * raptor_www_write_bytes_handler:
 * @www: WWW object
 * @userdata: user data
 * @ptr: data pointer
 * @size: size of individual item
 * @nmemb: number of items
 *
 * Receiving bytes of data from WWW retrieval handler.
 *
 * Set by raptor_www_set_write_bytes_handler().
 */
typedef void (*raptor_www_write_bytes_handler)(raptor_www* www, void *userdata, const void *ptr, size_t size, size_t nmemb);

/**
 * raptor_www_content_type_handler:
 * @www: WWW object
 * @userdata: user data
 * @content_type: content type seen
 *
 * Receiving Content-Type: header from WWW retrieval handler.
 *
 * Set by raptor_www_set_content_type_handler().
 */
typedef void (*raptor_www_content_type_handler)(raptor_www* www, void *userdata, const char *content_type);

/**
 * raptor_www_final_uri_handler:
 * @www: WWW object
 * @userdata: user data
 * @final_uri: final URI seen
 *
 * Receiving the final resolved URI from a WWW retrieval
 *
 * Set by raptor_www_set_final_uri_handler().
 */
typedef void (*raptor_www_final_uri_handler)(raptor_www* www, void *userdata, raptor_uri *final_uri);

/**
 * raptor_uri_filter_func:
 * @user_data: user data
 * @uri: #raptor_uri URI to check
 *
 * Callback function for #raptor_www_set_uri_filter
 *
 * Return value: non-0 to filter the URI
 */
typedef int (*raptor_uri_filter_func)(void *user_data, raptor_uri* uri);


/**
 * raptor_libxml_flags:
 * @RAPTOR_LIBXML_FLAGS_GENERIC_ERROR_SAVE: if set - save/restore the libxml generic error handler when parsing (default unset)
 * @RAPTOR_LIBXML_FLAGS_STRUCTURED_ERROR_SAVE: if set - save/restore the libxml structured error handler when parsing (default unset)
 *
 * libxml library flags
 *
 * These are used by raptor_world_set_libxml_flags() and
 * raptor_set_libxml_flags() to control common libxml features.
 *
 * If any handler saving/restoring is enabled, any existing handler
 * and context is saved before parsing and restored afterwards.
 * Otherwise, no saving/restoring is performed.
 *
 */
typedef enum {
  RAPTOR_LIBXML_FLAGS_GENERIC_ERROR_SAVE    = 1,
  RAPTOR_LIBXML_FLAGS_STRUCTURED_ERROR_SAVE = 2
} raptor_libxml_flags;


/* Public functions */

RAPTOR_API
raptor_world* raptor_new_world(void);
RAPTOR_API
int raptor_world_open(raptor_world* world);
RAPTOR_API
void raptor_free_world(raptor_world* world);
RAPTOR_API
void raptor_world_set_libxslt_security_preferences(raptor_world *world, void *security_preferences);
RAPTOR_API
void raptor_world_set_libxml_flags(raptor_world *world,  int flags);

#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_init(void);
RAPTOR_API RAPTOR_V1
void raptor_finish(void);
RAPTOR_API RAPTOR_V1
void raptor_set_libxslt_security_preferences(void *security_preferences);
void raptor_set_libxml_flags(int flags);
#endif

/* Get parser names */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_parsers_enumerate(const unsigned int counter, const char **name, const char **label);
RAPTOR_API RAPTOR_V1
int raptor_syntaxes_enumerate(const unsigned int counter, const char **name, const char **label, const char **mime_type, const unsigned char **uri_string);
RAPTOR_API RAPTOR_V1
int raptor_syntax_name_check(const char *name);
RAPTOR_API RAPTOR_V1
const char* raptor_guess_parser_name(raptor_uri *uri, const char *mime_type, const unsigned char *buffer, size_t len, const unsigned char *identifier);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_parsers_enumerate_v2(raptor_world* world, const unsigned int counter, const char **name, const char **label);
RAPTOR_API
int raptor_syntaxes_enumerate_v2(raptor_world* world, const unsigned int counter, const char **name, const char **label, const char **mime_type, const unsigned char **uri_string);
RAPTOR_API
int raptor_syntax_name_check_v2(raptor_world* world, const char *name);
RAPTOR_API
const char* raptor_guess_parser_name_v2(raptor_world* world, raptor_uri *uri, const char *mime_type, const unsigned char *buffer, size_t len, const unsigned char *identifier);
#endif

/* Create */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_parser* raptor_new_parser(const char *name);
RAPTOR_API RAPTOR_V1
raptor_parser* raptor_new_parser_for_content(raptor_uri *uri, const char *mime_type, const unsigned char *buffer, size_t len, const unsigned char *identifier);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_parser* raptor_new_parser_v2(raptor_world* world, const char *name);
RAPTOR_API
raptor_parser* raptor_new_parser_for_content_v2(raptor_world* world, raptor_uri *uri, const char *mime_type, const unsigned char *buffer, size_t len, const unsigned char *identifier);
#endif


RAPTOR_API
int raptor_start_parse(raptor_parser *rdf_parser, raptor_uri *uri);

/* Destroy */
RAPTOR_API
void raptor_free_parser(raptor_parser* parser);

/* Handlers */
RAPTOR_API
void raptor_set_fatal_error_handler(raptor_parser* parser, void *user_data, raptor_message_handler handler);
RAPTOR_API
void raptor_set_error_handler(raptor_parser* parser, void *user_data, raptor_message_handler handler);
RAPTOR_API
void raptor_set_warning_handler(raptor_parser* parser, void *user_data, raptor_message_handler handler);
RAPTOR_API
void raptor_set_statement_handler(raptor_parser* parser, void *user_data, raptor_statement_handler handler);
RAPTOR_API
void raptor_set_graph_handler(raptor_parser* parser, void *user_data, raptor_graph_handler handler);
RAPTOR_API
void raptor_set_generate_id_handler(raptor_parser* parser, void *user_data, raptor_generate_id_handler handler);
RAPTOR_API
void raptor_set_namespace_handler(raptor_parser* parser, void *user_data, raptor_namespace_handler handler);
RAPTOR_API
void raptor_parser_set_uri_filter(raptor_parser* parser, raptor_uri_filter_func filter, void* user_data);

#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_print_statement(const raptor_statement * statement, FILE *stream);
RAPTOR_API RAPTOR_V1
void raptor_print_statement_as_ntriples(const raptor_statement * statement, FILE *stream);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
void raptor_print_statement_v2(const raptor_statement_v2 * statement, FILE *stream);
RAPTOR_API
void raptor_print_statement_as_ntriples_v2(const raptor_statement_v2 * statement, FILE *stream);
#endif
#if !defined(RAPTOR_DISABLE_DEPRECATED) && !defined(RAPTOR_DISABLE_V1)
RAPTOR_API RAPTOR_DEPRECATED
void raptor_print_statement_detailed(const raptor_statement * statement, int detailed, FILE *stream);
#endif
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
unsigned char* raptor_statement_part_as_counted_string(const void *term, raptor_identifier_type type, raptor_uri* literal_datatype, const unsigned char *literal_language, size_t* len_p);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_statement_part_as_string(const void *term, raptor_identifier_type type, raptor_uri* literal_datatype, const unsigned char *literal_language);  
RAPTOR_API RAPTOR_V1
int raptor_statement_compare(const raptor_statement *s1, const raptor_statement *s2);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
unsigned char* raptor_statement_part_as_counted_string_v2(raptor_world* world, const void *term, raptor_identifier_type type, raptor_uri* literal_datatype, const unsigned char *literal_language, size_t* len_p);
RAPTOR_API
unsigned char* raptor_statement_part_as_string_v2(raptor_world* world, const void *term, raptor_identifier_type type, raptor_uri* literal_datatype, const unsigned char *literal_language);  
RAPTOR_API
int raptor_statement_compare_v2(const raptor_statement_v2 *s1, const raptor_statement_v2 *s2);
#endif


RAPTOR_API
raptor_locator* raptor_get_locator(raptor_parser* rdf_parser);

RAPTOR_API
void raptor_set_default_generate_id_parameters(raptor_parser* rdf_parser, char *prefix, int base);

/* Parsing functions */
RAPTOR_API
int raptor_parse_chunk(raptor_parser* rdf_parser, const unsigned char *buffer, size_t len, int is_end);
RAPTOR_API
int raptor_parse_file_stream(raptor_parser* rdf_parser, FILE *stream, const char *filename, raptor_uri *base_uri);
RAPTOR_API
int raptor_parse_file(raptor_parser* rdf_parser, raptor_uri *uri, raptor_uri *base_uri);
RAPTOR_API
int raptor_parse_uri(raptor_parser* rdf_parser, raptor_uri *uri, raptor_uri *base_uri);
RAPTOR_API
int raptor_parse_uri_with_connection(raptor_parser* rdf_parser, raptor_uri *uri, raptor_uri *base_uri, void *connection);
RAPTOR_API
void raptor_parse_abort(raptor_parser* rdf_parser);

/* Utility functions */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_print_locator(FILE *stream, raptor_locator* locator);
RAPTOR_API RAPTOR_V1
int raptor_format_locator(char *buffer, size_t length, raptor_locator* locator);
RAPTOR_API RAPTOR_V1
const char * raptor_locator_uri(raptor_locator *locator);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
void raptor_print_locator_v2(raptor_world* world, FILE *stream, raptor_locator* locator);
RAPTOR_API
int raptor_format_locator_v2(raptor_world* world, char *buffer, size_t length, raptor_locator* locator);
#endif
RAPTOR_API
int raptor_locator_line(raptor_locator *locator);
RAPTOR_API
int raptor_locator_column(raptor_locator *locator);
RAPTOR_API
int raptor_locator_byte(raptor_locator *locator);
RAPTOR_API
const char * raptor_locator_file(raptor_locator *locator);
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
const char * raptor_locator_uri_v2(raptor_world* world, raptor_locator *locator);
#endif


RAPTOR_API
const char* raptor_get_name(raptor_parser *rdf_parser);
RAPTOR_API
const char* raptor_get_label(raptor_parser *rdf_parser);
RAPTOR_API
const char* raptor_get_mime_type(raptor_parser *rdf_parser);
RAPTOR_API
int raptor_get_need_base_uri(raptor_parser *rdf_parser);

#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_features_enumerate(const raptor_feature feature, const char **name, raptor_uri **uri, const char **label);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_features_enumerate_v2(raptor_world* world, const raptor_feature feature, const char **name, raptor_uri **uri, const char **label);
#endif
RAPTOR_API
int raptor_set_feature(raptor_parser *parser, raptor_feature feature, int value);
RAPTOR_API
int raptor_parser_set_feature_string(raptor_parser *parser, raptor_feature feature, const unsigned char *value);
RAPTOR_API
int raptor_get_feature(raptor_parser *parser, raptor_feature feature);
RAPTOR_API
const unsigned char* raptor_parser_get_feature_string(raptor_parser *parser, raptor_feature feature);
RAPTOR_API
unsigned int raptor_get_feature_count(void);
RAPTOR_API
void raptor_set_parser_strict(raptor_parser* rdf_parser, int is_strict);
RAPTOR_API
const char* raptor_parser_get_accept_header(raptor_parser* rdf_parser);

unsigned char* raptor_parser_generate_id(raptor_parser *rdf_parser, raptor_genid_type type);

RAPTOR_API
raptor_world* raptor_parser_get_world(raptor_parser* rdf_parser);

/* Get serializer names */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_serializers_enumerate(const unsigned int counter, const char **name, const char **label, const char **mime_type, const unsigned char **uri_string);
RAPTOR_API RAPTOR_V1
int raptor_serializer_syntax_name_check(const char *name);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_serializers_enumerate_v2(raptor_world* world, const unsigned int counter, const char **name, const char **label, const char **mime_type, const unsigned char **uri_string);
RAPTOR_API
int raptor_serializer_syntax_name_check_v2(raptor_world* world, const char *name);
#endif

/* Serializing */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_serializer* raptor_new_serializer(const char *name);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_serializer* raptor_new_serializer_v2(raptor_world* world, const char *name);
#endif
RAPTOR_API
void raptor_free_serializer(raptor_serializer* rdf_serializer);

RAPTOR_API
int raptor_serialize_start(raptor_serializer *rdf_serializer, raptor_uri *uri, raptor_iostream *iostream);
RAPTOR_API
int raptor_serialize_start_to_iostream(raptor_serializer *rdf_serializer, raptor_uri *uri, raptor_iostream *iostream);
RAPTOR_API
int raptor_serialize_start_to_filename(raptor_serializer *rdf_serializer, const char *filename);
RAPTOR_API
int raptor_serialize_start_to_string(raptor_serializer *rdf_serializer, raptor_uri *uri, void **string_p, size_t *length_p);
RAPTOR_API
int raptor_serialize_start_to_file_handle(raptor_serializer *rdf_serializer, raptor_uri *uri, FILE *fh);
RAPTOR_API
int raptor_serialize_set_namespace(raptor_serializer* rdf_serializer, raptor_uri *uri, const unsigned char *prefix);
RAPTOR_API
int raptor_serialize_set_namespace_from_namespace(raptor_serializer* rdf_serializer, raptor_namespace *nspace);
RAPTOR_API
int raptor_serialize_statement(raptor_serializer* rdf_serializer, const raptor_statement *statement);
RAPTOR_API
int raptor_serialize_end(raptor_serializer *rdf_serializer);
RAPTOR_API
raptor_iostream* raptor_serializer_get_iostream(raptor_serializer *serializer);
RAPTOR_API
void raptor_serializer_set_error_handler(raptor_serializer* serializer, void *user_data, raptor_message_handler handler);
RAPTOR_API
void raptor_serializer_set_warning_handler(raptor_serializer* serializer, void *user_data, raptor_message_handler handler);
RAPTOR_API
raptor_locator* raptor_serializer_get_locator(raptor_serializer *rdf_serializer);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_serializer_features_enumerate(const raptor_feature feature, const char **name,  raptor_uri **uri, const char **label);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_serializer_features_enumerate_v2(raptor_world* world, const raptor_feature feature, const char **name,  raptor_uri **uri, const char **label);
#endif
RAPTOR_API
int raptor_serializer_set_feature(raptor_serializer *serializer, raptor_feature feature, int value);
RAPTOR_API
int raptor_serializer_set_feature_string(raptor_serializer *serializer, raptor_feature feature, const unsigned char *value);
RAPTOR_API
int raptor_serializer_get_feature(raptor_serializer *serializer, raptor_feature feature);
RAPTOR_API
const unsigned char *raptor_serializer_get_feature_string(raptor_serializer *serializer, raptor_feature feature);

RAPTOR_API
raptor_world* raptor_serializer_get_world(raptor_serializer* rdf_serializer);

/* memory functions */
RAPTOR_API
void raptor_free_memory(void *ptr);
RAPTOR_API
void* raptor_alloc_memory(size_t size);
RAPTOR_API
void* raptor_calloc_memory(size_t nmemb, size_t size);

/* URI functions */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri(const unsigned char *uri_string);
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_from_uri_local_name(raptor_uri *uri, const unsigned char *local_name);
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_relative_to_base(raptor_uri *base_uri, const unsigned char *uri_string);
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_from_id(raptor_uri *base_uri, const unsigned char *id);
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_for_rdf_concept(const char *name);
RAPTOR_API RAPTOR_V1
void raptor_free_uri(raptor_uri *uri);
RAPTOR_API RAPTOR_V1
int raptor_uri_equals(raptor_uri* uri1, raptor_uri* uri2);
RAPTOR_API RAPTOR_V1
int raptor_uri_compare(raptor_uri* uri1, raptor_uri* uri2);
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_uri_copy(raptor_uri *uri);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_as_string(raptor_uri *uri);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_as_counted_string(raptor_uri *uri, size_t* len_p);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_uri* raptor_new_uri_v2(raptor_world* world, const unsigned char *uri_string);
RAPTOR_API
raptor_uri* raptor_new_uri_from_uri_local_name_v2(raptor_world* world, raptor_uri *uri, const unsigned char *local_name);
RAPTOR_API
raptor_uri* raptor_new_uri_relative_to_base_v2(raptor_world* world, raptor_uri *base_uri, const unsigned char *uri_string);
RAPTOR_API
raptor_uri* raptor_new_uri_from_id_v2(raptor_world* world, raptor_uri *base_uri, const unsigned char *id);
RAPTOR_API
raptor_uri* raptor_new_uri_for_rdf_concept_v2(raptor_world* world, const char *name);
RAPTOR_API
void raptor_free_uri_v2(raptor_world* world, raptor_uri *uri);
RAPTOR_API
int raptor_uri_equals_v2(raptor_world* world, raptor_uri* uri1, raptor_uri* uri2);
RAPTOR_API
int raptor_uri_compare_v2(raptor_world* world, raptor_uri* uri1, raptor_uri* uri2);
RAPTOR_API
raptor_uri* raptor_uri_copy_v2(raptor_world* world, raptor_uri *uri);
RAPTOR_API
unsigned char* raptor_uri_as_string_v2(raptor_world* world, raptor_uri *uri);
RAPTOR_API
unsigned char* raptor_uri_as_counted_string_v2(raptor_world* world, raptor_uri *uri, size_t* len_p);
#endif

/* Make an xml:base-compatible URI from an existing one */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_for_xmlbase(raptor_uri* old_uri);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_uri* raptor_new_uri_for_xmlbase_v2(raptor_world* world, raptor_uri* old_uri);
#endif
/* Make a URI suitable for retrieval (no fragment, has path) from an existing one */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_uri* raptor_new_uri_for_retrieval(raptor_uri* old_uri);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_uri* raptor_new_uri_for_retrieval_v2(raptor_world* world, raptor_uri* old_uri);
#endif

/* Identifier functions */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_identifier* raptor_new_identifier(raptor_identifier_type type, raptor_uri *uri, raptor_uri_source uri_source, const unsigned char *id, const unsigned char *literal, raptor_uri *literal_datatype, const unsigned char *literal_language);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_identifier* raptor_new_identifier_v2(raptor_world* world, raptor_identifier_type type, raptor_uri *uri, raptor_uri_source uri_source, const unsigned char *id, const unsigned char *literal, raptor_uri *literal_datatype, const unsigned char *literal_language);
#endif
RAPTOR_API
int raptor_copy_identifier(raptor_identifier *dest, raptor_identifier *src);
RAPTOR_API
void raptor_free_identifier(raptor_identifier *identifier);

/* Utility functions */
RAPTOR_API
int raptor_print_ntriples_string(FILE *stream, const unsigned char *string, const char delim);
#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
unsigned char* raptor_ntriples_string_as_utf8_string(raptor_parser* rdf_parser, const unsigned char *src, int len, size_t *dest_lenp);
#endif
#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
const char* raptor_ntriples_term_as_string(raptor_ntriples_term_type term);
#endif
RAPTOR_API
int raptor_iostream_write_string_ntriples(raptor_iostream *iostr, const unsigned char *string, size_t len, const char delim);
RAPTOR_API
int raptor_iostream_write_string_python(raptor_iostream *iostr, const unsigned char *string, size_t len, const char delim, int flags);
#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
void raptor_iostream_write_string_turtle(raptor_iostream *iostr, const unsigned char *string, size_t len);
#endif
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_iostream_write_statement_ntriples(raptor_iostream* iostr, const raptor_statement *statement);
RAPTOR_API
#endif
#ifdef RAPTOR_V2_AVAILABLE
void raptor_iostream_write_statement_ntriples_v2(raptor_world* world, raptor_iostream* iostr, const raptor_statement *statement);
#endif
RAPTOR_API
int raptor_xml_any_escape_string(const unsigned char *string, size_t len, unsigned char *buffer, size_t length, char quote, int xml_version, raptor_simple_message_handler error_handler, void *error_data);
RAPTOR_API
int raptor_iostream_write_xml_any_escaped_string(raptor_iostream* iostr, const unsigned char *string, size_t len, char quote, int xml_version, raptor_simple_message_handler error_handler, void *error_data);
RAPTOR_API
int raptor_xml_escape_string(const unsigned char *string, size_t len, unsigned char *buffer, size_t length, char quote, raptor_simple_message_handler error_handler, void *error_data);
RAPTOR_API
int raptor_iostream_write_xml_escaped_string(raptor_iostream* iostr, const unsigned char *string, size_t len, char quote, raptor_simple_message_handler error_handler, void *error_data);

RAPTOR_API
char* raptor_vsnprintf(const char *message, va_list arguments) RAPTOR_PRINTF_FORMAT(1, 0);

RAPTOR_API
int raptor_xml_name_check(const unsigned char *string, size_t length, int xml_version);

/* raptor_rfc2396.c */
RAPTOR_API
void raptor_uri_resolve_uri_reference(const unsigned char *base_uri, const unsigned char *reference_uri, unsigned char* buffer, size_t length);

/* raptor_uri.c */
RAPTOR_API
unsigned char *raptor_uri_filename_to_uri_string(const char *filename);
RAPTOR_API
char *raptor_uri_uri_string_to_filename(const unsigned char *uri_string);
RAPTOR_API
char *raptor_uri_uri_string_to_filename_fragment(const unsigned char *uri_string, unsigned char **fragment_p);
#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
int raptor_uri_is_file_uri(const unsigned char* uri_string);
#endif
RAPTOR_API
int raptor_uri_uri_string_is_file_uri(const unsigned char* uri_string);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_to_relative_counted_uri_string(raptor_uri *base_uri, raptor_uri *reference_uri, size_t *length_p);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_to_relative_uri_string(raptor_uri *base_uri,  raptor_uri *reference_uri);
RAPTOR_API RAPTOR_V1
void raptor_uri_print(const raptor_uri* uri, FILE *stream);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_to_counted_string(raptor_uri *uri, size_t *len_p);
RAPTOR_API RAPTOR_V1
unsigned char* raptor_uri_to_string(raptor_uri *uri);
RAPTOR_API RAPTOR_V1
void raptor_uri_set_handler(const raptor_uri_handler *handler, void *context);
RAPTOR_API RAPTOR_V1
void raptor_uri_get_handler(const raptor_uri_handler **handler, void **context);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
unsigned char* raptor_uri_to_relative_counted_uri_string_v2(raptor_world* world, raptor_uri *base_uri, raptor_uri *reference_uri, size_t *length_p);
RAPTOR_API
unsigned char* raptor_uri_to_relative_uri_string_v2(raptor_world* world, raptor_uri *base_uri,  raptor_uri *reference_uri);

RAPTOR_API
void raptor_uri_print_v2(raptor_world* world, const raptor_uri* uri, FILE *stream);
RAPTOR_API
unsigned char* raptor_uri_to_counted_string_v2(raptor_world* world, raptor_uri *uri, size_t *len_p);
RAPTOR_API
unsigned char* raptor_uri_to_string_v2(raptor_world* world, raptor_uri *uri);

RAPTOR_API
void raptor_uri_set_handler_v2(raptor_world* world, const raptor_uri_handler *handler, void *context);
RAPTOR_API
void raptor_uri_get_handler_v2(raptor_world* world, const raptor_uri_handler **handler, void **context);
#endif

/**
 * RAPTOR_RDF_MS_URI:
 *
 * RDF Namespace URI (rdf:).
 *
 * Copy with raptor_uri_copy() to use.
 */
#define RAPTOR_RDF_MS_URI raptor_rdf_namespace_uri

/**
 * RAPTOR_RDF_SCHEMA_URI:
 *
 * RDF Schema Namespace URI (rdfs:).
 *
 * Copy with raptor_uri_copy() to use.
 */
#define RAPTOR_RDF_SCHEMA_URI raptor_rdf_schema_namespace_uri

/**
 * RAPTOR_XMLSCHEMA_DATATYPES_URI:
 *
 * XML Schema Datatypes URI (xsd:).
 *
 * Copy with raptor_uri_copy() to use.
 */
#define RAPTOR_XMLSCHEMA_DATATYPES_URI raptor_xmlschema_datatypes_namespace_uri

/**
 * RAPTOR_OWL_URI:
 *
 * OWL Namespace URI (owl:).
 *
 * Copy with raptor_uri_copy() to use.
 */
#define RAPTOR_OWL_URI raptor_owl_namespace_uri


/* raptor_www */
#ifndef RAPOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_www_init(void);
RAPTOR_API RAPTOR_V1
void raptor_www_finish(void);
RAPTOR_API RAPTOR_V1
void raptor_www_no_www_library_init_finish(void);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_www_init_v2(raptor_world* world);
RAPTOR_API
void raptor_www_finish_v2(raptor_world* world);
RAPTOR_API
void raptor_www_no_www_library_init_finish_v2(raptor_world* world);
#endif


#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_www *raptor_www_new(void);
RAPTOR_API RAPTOR_V1
raptor_www *raptor_www_new_with_connection(void* connection);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_www *raptor_www_new_v2(raptor_world* world);
RAPTOR_API
raptor_www *raptor_www_new_with_connection_v2(raptor_world* world, void* connection);
#endif
RAPTOR_API
void raptor_www_free(raptor_www *www);
RAPTOR_API
void raptor_www_set_user_agent(raptor_www *www, const char *user_agent);
RAPTOR_API
void raptor_www_set_proxy(raptor_www *www, const char *proxy);
RAPTOR_API
void raptor_www_set_http_accept(raptor_www *www, const char *value);
RAPTOR_API
void raptor_www_set_write_bytes_handler(raptor_www *www, raptor_www_write_bytes_handler handler, void *user_data);
RAPTOR_API
void raptor_www_set_content_type_handler(raptor_www *www, raptor_www_content_type_handler handler, void *user_data);
RAPTOR_API
void raptor_www_set_final_uri_handler(raptor_www* www, raptor_www_final_uri_handler handler, void *user_data);
RAPTOR_API
void raptor_www_set_error_handler(raptor_www *www, raptor_message_handler error_handler, void *error_data);
RAPTOR_API
void raptor_www_set_uri_filter(raptor_www* www, raptor_uri_filter_func filter, void* user_data);
RAPTOR_API
void raptor_www_set_connection_timeout(raptor_www* www, int timeout);
RAPTOR_API
int raptor_www_set_http_cache_control(raptor_www* www, const char* cache_control);
RAPTOR_API
int raptor_www_fetch(raptor_www *www, raptor_uri *uri);
RAPTOR_API
int raptor_www_fetch_to_string(raptor_www *www, raptor_uri *uri, void **string_p, size_t *length_p, void *(*malloc_handler)(size_t size));
RAPTOR_API
void* raptor_www_get_connection(raptor_www *www);
RAPTOR_API
void raptor_www_abort(raptor_www *www, const char *reason);
RAPTOR_API
raptor_uri* raptor_www_get_final_uri(raptor_www* www);


/* raptor_qname - XML qnames */
RAPTOR_API
raptor_qname* raptor_new_qname(raptor_namespace_stack *nstack, const unsigned char *name, const unsigned char *value, raptor_simple_message_handler error_handler, void *error_data);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_qname* raptor_new_qname_from_namespace_local_name(raptor_namespace *ns, const unsigned char *local_name, const unsigned char *value);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_qname* raptor_new_qname_from_namespace_local_name_v2(raptor_world* world, raptor_namespace *ns, const unsigned char *local_name, const unsigned char *value);
#endif
RAPTOR_API
raptor_qname* raptor_qname_copy(raptor_qname *qname);
RAPTOR_API
void raptor_free_qname(raptor_qname* name);
RAPTOR_API
int raptor_qname_equal(raptor_qname *name1, raptor_qname *name2);
/* utility function */
RAPTOR_API
raptor_uri* raptor_qname_string_to_uri(raptor_namespace_stack *nstack,  const unsigned char *name, size_t name_len, raptor_simple_message_handler error_handler, void *error_data);
RAPTOR_API
int raptor_iostream_write_qname(raptor_iostream* iostr, raptor_qname *qname);
RAPTOR_API
unsigned char* raptor_qname_to_counted_name(raptor_qname *qname, size_t* length_p);
RAPTOR_API
const raptor_namespace* raptor_qname_get_namespace(raptor_qname* name);
RAPTOR_API
const unsigned char* raptor_qname_get_local_name(raptor_qname* name);
RAPTOR_API
const unsigned char* raptor_qname_get_value(raptor_qname* name);
RAPTOR_API
const unsigned char* raptor_qname_get_counted_value(raptor_qname* name, size_t* length_p);

/* raptor_namespace_stack - stack of XML namespaces */
RAPTOR_API
raptor_namespace* raptor_new_namespace_from_uri(raptor_namespace_stack *nstack, const unsigned char *prefix,  raptor_uri* ns_uri, int depth);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_namespace_stack* raptor_new_namespaces(const raptor_uri_handler *uri_handler, void *uri_context, raptor_simple_message_handler error_handler, void *error_data, int defaults);
RAPTOR_API RAPTOR_V1
int raptor_namespaces_init(raptor_namespace_stack *nstack, const raptor_uri_handler *uri_handler, void *uri_context, raptor_simple_message_handler error_handler, void *error_data, int defaults);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_namespace_stack* raptor_new_namespaces_v2(raptor_world* world, raptor_simple_message_handler error_handler, void *error_data, int defaults);
RAPTOR_API
int raptor_namespaces_init_v2(raptor_world* world, raptor_namespace_stack *nstack, raptor_simple_message_handler error_handler, void *error_data, int defaults);
#endif
RAPTOR_API
void raptor_namespaces_clear(raptor_namespace_stack *nstack);
RAPTOR_API
void raptor_free_namespaces(raptor_namespace_stack *nstack);
RAPTOR_API
void raptor_namespaces_start_namespace(raptor_namespace_stack *nstack, raptor_namespace *nspace);
RAPTOR_API
int raptor_namespaces_start_namespace_full(raptor_namespace_stack *nstack, const unsigned char *prefix, const unsigned char *ns_uri_string, int depth);
RAPTOR_API
void raptor_namespaces_end_for_depth(raptor_namespace_stack *nstack, int depth);
RAPTOR_API
raptor_namespace* raptor_namespaces_get_default_namespace(raptor_namespace_stack *nstack);
RAPTOR_API
raptor_namespace *raptor_namespaces_find_namespace(raptor_namespace_stack *nstack, const unsigned char *prefix, int prefix_length);
RAPTOR_API
raptor_namespace* raptor_namespaces_find_namespace_by_uri(raptor_namespace_stack *nstack, raptor_uri *ns_uri);
RAPTOR_API
int raptor_namespaces_namespace_in_scope(raptor_namespace_stack *nstack, const raptor_namespace *nspace);
RAPTOR_API
raptor_qname* raptor_namespaces_qname_from_uri(raptor_namespace_stack *nstack,  raptor_uri *uri, int xml_version);

/* raptor_namespace - XML namespace */
RAPTOR_API
raptor_namespace* raptor_new_namespace(raptor_namespace_stack *nstack, const unsigned char *prefix, const unsigned char *ns_uri_string, int depth);
RAPTOR_API
void raptor_free_namespace(raptor_namespace *ns);
RAPTOR_API
int raptor_namespace_copy(raptor_namespace_stack *nstack, raptor_namespace *ns, int new_depth);
RAPTOR_API
raptor_uri* raptor_namespace_get_uri(const raptor_namespace *ns);
RAPTOR_API
const unsigned char* raptor_namespace_get_prefix(const raptor_namespace *ns);
RAPTOR_API
const unsigned char* raptor_namespace_get_counted_prefix(const raptor_namespace *ns, size_t *length_p);
RAPTOR_API
unsigned char *raptor_namespaces_format(const raptor_namespace *ns, size_t *length_p);
RAPTOR_API
int raptor_iostream_write_namespace(raptor_iostream* iostr, raptor_namespace *ns);
RAPTOR_API
int raptor_new_namespace_parts_from_string(const unsigned char *string, unsigned char **prefix, unsigned char **uri_string);

/**
 * raptor_stringbuffer:
 *
 * Raptor string buffer class
 */
typedef struct raptor_stringbuffer_s raptor_stringbuffer;

/* Sequence class */
/**
 * raptor_sequence:
 *
 * Raptor sequence class
 */
typedef struct raptor_sequence_s raptor_sequence;

/**
 * raptor_sequence_free_handler:
 * @object: object to free
 *
 * Handler function for freeing a sequence item.
 *
 * Set by raptor_new_sequence().
*/
typedef void (raptor_sequence_free_handler(void* object));

#ifdef RAPTOR_V2_AVAILABLE
/**
 * raptor_sequence_free_handler_v2:
 * @context: context data for the free handler
 * @object: object to free
 *
 * Handler function for freeing a sequence item.
 *
 * Set by raptor_new_sequence_v2().
*/
typedef void (raptor_sequence_free_handler_v2(void* context, void* object));
#endif

/**
 * raptor_sequence_print_handler:
 * @object: object to print
 * @fh: FILE* to print to
 *
 * Handler function for printing a sequence item.
 *
 * Set by raptor_new_sequence() or raptor_sequence_set_print_handler().
 */
typedef void (raptor_sequence_print_handler(void *object, FILE *fh));

#ifdef RAPTOR_V2_AVAILABLE
/**
 * raptor_sequence_print_handler_v2:
 * @context: context data for the print handler
 * @object: object to print
 * @fh: FILE* to print to
 *
 * Handler function for printing a sequence item.
 *
 * Set by raptor_new_sequence_v2() or raptor_sequence_set_print_handler_v2().
 */
typedef void (raptor_sequence_print_handler_v2(void *context, void *object, FILE *fh));
#endif

/* Create */
RAPTOR_API
raptor_sequence* raptor_new_sequence(raptor_sequence_free_handler* free_handler, raptor_sequence_print_handler* print_handler);
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_sequence* raptor_new_sequence_v2(raptor_sequence_free_handler_v2* free_handler, raptor_sequence_print_handler_v2* print_handler, void* handler_context);
#endif
/* Destroy */
RAPTOR_API
void raptor_free_sequence(raptor_sequence* seq);
/* Methods */
RAPTOR_API
int raptor_sequence_size(raptor_sequence* seq);
RAPTOR_API
int raptor_sequence_set_at(raptor_sequence* seq, int idx, void *data);
RAPTOR_API
int raptor_sequence_push(raptor_sequence* seq, void *data);
RAPTOR_API
int raptor_sequence_shift(raptor_sequence* seq, void *data);
RAPTOR_API
void* raptor_sequence_get_at(raptor_sequence* seq, int idx);
RAPTOR_API
void* raptor_sequence_pop(raptor_sequence* seq);
RAPTOR_API
void* raptor_sequence_unshift(raptor_sequence* seq);
RAPTOR_API
void* raptor_sequence_delete_at(raptor_sequence* seq, int idx);

RAPTOR_API
int raptor_compare_strings(const void *a, const void *b);

RAPTOR_API
void raptor_sequence_sort(raptor_sequence* seq, int(*compare)(const void *, const void *));

/* helper for printing sequences of strings */ 
RAPTOR_API
void raptor_sequence_print_string(char *data, FILE *fh);
RAPTOR_API RAPTOR_DEPRECATED
void raptor_sequence_print_uri(char *data, FILE *fh);
RAPTOR_API
void raptor_sequence_set_print_handler(raptor_sequence *seq, raptor_sequence_print_handler *print_handler);
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
void raptor_sequence_set_print_handler_v2(raptor_sequence *seq, raptor_sequence_print_handler_v2 *print_handler);
#endif
RAPTOR_API
void raptor_sequence_print(raptor_sequence* seq, FILE* fh);
RAPTOR_API
int raptor_sequence_join(raptor_sequence* dest, raptor_sequence *src);


/* Unicode and UTF8 */

/**
 * raptor_unichar:
 *
 * raptor Unicode codepoint
 */
typedef unsigned long raptor_unichar;
RAPTOR_API
int raptor_unicode_char_to_utf8(raptor_unichar c, unsigned char *output);
RAPTOR_API
int raptor_utf8_to_unicode_char(raptor_unichar *output, const unsigned char *input, int length);
RAPTOR_API
int raptor_unicode_is_xml11_namestartchar(raptor_unichar c);
RAPTOR_API
int raptor_unicode_is_xml10_namestartchar(raptor_unichar c);
RAPTOR_API
int raptor_unicode_is_xml11_namechar(raptor_unichar c);
RAPTOR_API
int raptor_unicode_is_xml10_namechar(raptor_unichar c);
RAPTOR_API
int raptor_utf8_check(const unsigned char *string, size_t length);

/* raptor_stringbuffer */
RAPTOR_API
raptor_stringbuffer* raptor_new_stringbuffer(void);
RAPTOR_API
void raptor_free_stringbuffer(raptor_stringbuffer *stringbuffer);
RAPTOR_API
int raptor_stringbuffer_append_counted_string(raptor_stringbuffer* stringbuffer, const unsigned char *string, size_t length, int do_copy);
RAPTOR_API
int raptor_stringbuffer_append_string(raptor_stringbuffer* stringbuffer, const unsigned char *string, int do_copy);
RAPTOR_API
int raptor_stringbuffer_append_decimal(raptor_stringbuffer* stringbuffer, int integer);
RAPTOR_API
int raptor_stringbuffer_append_stringbuffer(raptor_stringbuffer* stringbuffer, raptor_stringbuffer* append);
RAPTOR_API
int raptor_stringbuffer_prepend_counted_string(raptor_stringbuffer* stringbuffer, const unsigned char *string, size_t length, int do_copy);
RAPTOR_API
int raptor_stringbuffer_prepend_string(raptor_stringbuffer* stringbuffer, const unsigned char *string, int do_copy);
RAPTOR_API
unsigned char * raptor_stringbuffer_as_string(raptor_stringbuffer* stringbuffer);
RAPTOR_API
size_t raptor_stringbuffer_length(raptor_stringbuffer* stringbuffer);
RAPTOR_API
int raptor_stringbuffer_copy_to_string(raptor_stringbuffer* stringbuffer, unsigned char *string, size_t length);

/**
 * raptor_iostream_init_func:
 * @context: stream context data
 *
 * Handler function for #raptor_iostream initialising.
 *
 * Return value: non-0 on failure.
 */
typedef int (*raptor_iostream_init_func) (void *context);

/**
 * raptor_iostream_finish_func:
 * @context: stream context data
 *
 * Handler function for #raptor_iostream terminating.
 *
 */
typedef void (*raptor_iostream_finish_func) (void *context);

/**
 * raptor_iostream_write_byte_func
 * @context: stream context data
 * @byte: byte to write
 *
 * Handler function for implementing raptor_iostream_write_byte().
 *
 * Return value: non-0 on failure.
 */
typedef int (*raptor_iostream_write_byte_func) (void *context, const int byte);

/**
 * raptor_iostream_write_bytes_func:
 * @context: stream context data
 * @ptr: pointer to bytes to write
 * @size: size of item
 * @nmemb: number of items
 *
 * Handler function for implementing raptor_iostream_write_bytes().
 *
 * Return value: non-0 on failure.
 */
typedef int (*raptor_iostream_write_bytes_func) (void *context, const void *ptr, size_t size, size_t nmemb);

/**
 * raptor_iostream_write_end_func:
 * @context: stream context data
 *
 * Handler function for implementing raptor_iostream_write_end().
 *
 */
typedef void (*raptor_iostream_write_end_func) (void *context);

/**
 * raptor_iostream_read_bytes_func:
 * @context: stream context data
 * @ptr: pointer to buffer to read into
 * @size: size of buffer
 * @nmemb: number of items
 *
 * Handler function for implementing raptor_iostream_read_bytes().
 *
 * Return value: number of items read, 0 or < @size on EOF, <0 on failure
 */
typedef int (*raptor_iostream_read_bytes_func) (void *context, void *ptr, size_t size, size_t nmemb);

/**
 * raptor_iostream_read_eof_func:
 * @context: stream context data
 *
 * Handler function for implementing raptor_iostream_read_eof().
 *
 * Return value: non-0 if EOF
 */
typedef int (*raptor_iostream_read_eof_func) (void *context);

#ifndef RAPTOR_DISABLE_DEPRECATED
/**
 * raptor_iostream_handler:
 * @init:  initialisation handler - optional, called at most once
 * @finish: finishing handler -  optional, called at most once
 * @write_byte: write byte handler - required (for writing)
 * @write_bytes: write bytes handler - required (for writing)
 * @write_end: write end handler - optional (for writing), called at most once
 *
 * I/O stream implementation handler structure.
 *
 * DEPRECATED: Use #raptor_iostream_handler2
 */
typedef struct {
  raptor_iostream_init_func         init;
  raptor_iostream_finish_func       finish;
  raptor_iostream_write_byte_func   write_byte;
  raptor_iostream_write_bytes_func  write_bytes;
  raptor_iostream_write_end_func    write_end;
} raptor_iostream_handler;
#endif

/**
 * raptor_iostream_handler2:
 * @version: interface version.  Presently 1 or 2.
 * @init:  initialisation handler - optional, called at most once (V1)
 * @finish: finishing handler -  optional, called at most once (V1)
 * @write_byte: write byte handler - required (for writing) (V1)
 * @write_bytes: write bytes handler - required (for writing) (V1)
 * @write_end: write end handler - optional (for writing), called at most once (V1)
 * @read_bytes: read bytes handler - required (for reading) (V2)
 * @read_eof: read EOF handler - required (for reading) (V2)
 *
 * I/O stream implementation handler structure.
 * 
 */
typedef struct {
  int version;

  /* V1 functions */
  raptor_iostream_init_func         init;
  raptor_iostream_finish_func       finish;
  raptor_iostream_write_byte_func   write_byte;
  raptor_iostream_write_bytes_func  write_bytes;
  raptor_iostream_write_end_func    write_end;

  /* V2 functions */
  raptor_iostream_read_bytes_func   read_bytes;
  raptor_iostream_read_eof_func     read_eof;
} raptor_iostream_handler2;


#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
raptor_iostream* raptor_new_iostream_from_handler(void *context, const raptor_iostream_handler *handler);
#endif
RAPTOR_API
raptor_iostream* raptor_new_iostream_from_handler2(void *user_data, const raptor_iostream_handler2* const handler2);
RAPTOR_API
raptor_iostream* raptor_new_iostream_to_sink(void);
RAPTOR_API
raptor_iostream* raptor_new_iostream_to_filename(const char *filename);
RAPTOR_API
raptor_iostream* raptor_new_iostream_to_file_handle(FILE *handle);
RAPTOR_API
raptor_iostream* raptor_new_iostream_to_string(void **string_p, size_t *length_p, void *(*malloc_handler)(size_t size));
RAPTOR_API
raptor_iostream* raptor_new_iostream_from_sink(void);
RAPTOR_API
raptor_iostream* raptor_new_iostream_from_filename(const char *filename);
RAPTOR_API
raptor_iostream* raptor_new_iostream_from_file_handle(FILE *handle);
RAPTOR_API
raptor_iostream* raptor_new_iostream_from_string(void *string, size_t length);
RAPTOR_API
void raptor_free_iostream(raptor_iostream *iostr);

RAPTOR_API
int raptor_iostream_write_bytes(raptor_iostream *iostr, const void *ptr, size_t size, size_t nmemb);
RAPTOR_API
int raptor_iostream_write_byte(raptor_iostream *iostr, const int byte);
RAPTOR_API
void raptor_iostream_write_end(raptor_iostream *iostr);
RAPTOR_API
int raptor_iostream_write_string(raptor_iostream *iostr, const void *string);
RAPTOR_API
int raptor_iostream_write_counted_string(raptor_iostream *iostr, const void *string, size_t len);
#ifndef RAPTOR_DISABLE_DEPRECATED
RAPTOR_API RAPTOR_DEPRECATED
size_t raptor_iostream_get_bytes_written_count(raptor_iostream *iostr);
#endif
RAPTOR_API
unsigned long raptor_iostream_tell(raptor_iostream *iostr);
RAPTOR_API
int raptor_iostream_write_decimal(raptor_iostream* iostr, int integer);
RAPTOR_API
int raptor_iostream_format_hexadecimal(raptor_iostream* iostr, unsigned int integer, int width);
RAPTOR_API
int raptor_iostream_write_stringbuffer(raptor_iostream* iostr, raptor_stringbuffer *sb);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_iostream_write_uri(raptor_iostream *iostr,  raptor_uri *uri);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_iostream_write_uri_v2(raptor_world* world, raptor_iostream *iostr,  raptor_uri *uri);
#endif
RAPTOR_API
int raptor_iostream_read_bytes(raptor_iostream* iostr, void *ptr, size_t size, size_t nmemb);
RAPTOR_API
int raptor_iostream_read_eof(raptor_iostream *iostr);

/* Parser and Serializer features */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_feature raptor_feature_from_uri(raptor_uri *uri);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_feature raptor_feature_from_uri_v2(raptor_world* world, raptor_uri *uri);
#endif
RAPTOR_API
int raptor_feature_value_type(const raptor_feature feature);

/* SAX2 element Class (raptor_xml_element) */
RAPTOR_API
raptor_xml_element* raptor_new_xml_element(raptor_qname* name, const unsigned char* xml_language, raptor_uri* xml_base);
RAPTOR_API
raptor_xml_element* raptor_new_xml_element_from_namespace_local_name(raptor_namespace *ns, const unsigned char *name, const unsigned char *xml_language, raptor_uri *xml_base);
RAPTOR_API
void raptor_free_xml_element(raptor_xml_element *element);
RAPTOR_API
raptor_qname* raptor_xml_element_get_name(raptor_xml_element *xml_element);
RAPTOR_API
void raptor_xml_element_set_attributes(raptor_xml_element* xml_element, raptor_qname **attributes, int count);
RAPTOR_API
raptor_qname** raptor_xml_element_get_attributes(raptor_xml_element* xml_element);
RAPTOR_API
int raptor_xml_element_get_attributes_count(raptor_xml_element* xml_element);
RAPTOR_API
int raptor_xml_element_declare_namespace(raptor_xml_element* xml_element, raptor_namespace *nspace);
RAPTOR_API
int raptor_iostream_write_xml_element(raptor_iostream *iostr, raptor_xml_element *element, raptor_namespace_stack *nstack, int is_empty, int is_end, raptor_simple_message_handler error_handler, void *error_data, int depth);
RAPTOR_API
int raptor_xml_element_is_empty(raptor_xml_element* xml_element);
RAPTOR_API
const unsigned char* raptor_xml_element_get_language(raptor_xml_element* xml_element);

/* XML Writer Class (raptor_xml_writer) */
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
raptor_xml_writer* raptor_new_xml_writer(raptor_namespace_stack *nstack, const raptor_uri_handler *uri_handler, void *uri_context, raptor_iostream* iostr, raptor_simple_message_handler error_handler, void *error_data, int canonicalize);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
raptor_xml_writer* raptor_new_xml_writer_v2(raptor_world* world, raptor_namespace_stack *nstack, raptor_iostream* iostr, raptor_simple_message_handler error_handler, void *error_data, int canonicalize);
#endif
RAPTOR_API
void raptor_free_xml_writer(raptor_xml_writer* xml_writer);
RAPTOR_API
void raptor_xml_writer_empty_element(raptor_xml_writer* xml_writer, raptor_xml_element *element);
RAPTOR_API
void raptor_xml_writer_start_element(raptor_xml_writer* xml_writer, raptor_xml_element *element);
RAPTOR_API
void raptor_xml_writer_end_element(raptor_xml_writer* xml_writer, raptor_xml_element *element);
RAPTOR_API
void raptor_xml_writer_newline(raptor_xml_writer* xml_writer);
RAPTOR_API
void raptor_xml_writer_cdata(raptor_xml_writer* xml_writer, const unsigned char *s);
RAPTOR_API
void raptor_xml_writer_cdata_counted(raptor_xml_writer* xml_writer, const unsigned char *s, unsigned int len);
RAPTOR_API
void raptor_xml_writer_raw(raptor_xml_writer* xml_writer, const unsigned char *s);
RAPTOR_API
void raptor_xml_writer_raw_counted(raptor_xml_writer* xml_writer, const unsigned char *s, unsigned int len);
RAPTOR_API
void raptor_xml_writer_comment(raptor_xml_writer* xml_writer, const unsigned char *s);
RAPTOR_API
void raptor_xml_writer_comment_counted(raptor_xml_writer* xml_writer, const unsigned char *s, unsigned int len);
RAPTOR_API
void raptor_xml_writer_flush(raptor_xml_writer* xml_writer);
#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
int raptor_xml_writer_features_enumerate(const raptor_feature feature, const char **name,  raptor_uri **uri, const char **label);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
int raptor_xml_writer_features_enumerate_v2(raptor_world* world, const raptor_feature feature, const char **name,  raptor_uri **uri, const char **label);
#endif
RAPTOR_API
int raptor_xml_writer_set_feature(raptor_xml_writer *xml_writer, raptor_feature feature, int value);
RAPTOR_API
int raptor_xml_writer_set_feature_string(raptor_xml_writer *xml_writer, raptor_feature feature, const unsigned char *value);
RAPTOR_API
int raptor_xml_writer_get_feature(raptor_xml_writer *xml_writer, raptor_feature feature);
RAPTOR_API
const unsigned char *raptor_xml_writer_get_feature_string(raptor_xml_writer *xml_writer, raptor_feature feature);
RAPTOR_API
int raptor_xml_writer_get_depth(raptor_xml_writer *xml_writer);

/**
 * raptor_sax2_start_element_handler:
 * @user_data: user data
 * @xml_element: XML element
 *
 * SAX2 start element handler
 */
typedef void (*raptor_sax2_start_element_handler)(void *user_data, raptor_xml_element *xml_element);

/**
 * raptor_sax2_end_element_handler:
 * @user_data: user data
 * @xml_element: XML element
 *
 * SAX2 end element handler
 */
typedef void (*raptor_sax2_end_element_handler)(void *user_data, raptor_xml_element* xml_element);

/**
 * raptor_sax2_characters_handler:
 * @user_data: user data
 * @xml_element: XML element
 * @s: string
 * @len: string len
 *
 * SAX2 characters handler
 */
typedef void (*raptor_sax2_characters_handler)(void *user_data, raptor_xml_element* xml_element, const unsigned char *s, int len);

/**
 * raptor_sax2_cdata_handler:
 * @user_data: user data
 * @xml_element: XML element
 * @s: string
 * @len: string len

 * SAX2 CDATA section handler
 */
typedef void (*raptor_sax2_cdata_handler)(void *user_data, raptor_xml_element* xml_element, const unsigned char *s, int len);

/**
 * raptor_sax2_comment_handler:
 * @user_data: user data
 * @xml_element: XML element
 * @s: string
 *
 * SAX2 XML comment handler
 */
typedef void (*raptor_sax2_comment_handler)(void *user_data, raptor_xml_element* xml_element, const unsigned char *s);

/**
 * raptor_sax2_unparsed_entity_decl_handler:
 * @user_data: user data
 * @entityName: entity name
 * @base: base URI
 * @systemId: system ID
 * @publicId: public ID
 * @notationName: notation name
 *
 * SAX2 unparsed entity (NDATA) handler
 */
typedef void (*raptor_sax2_unparsed_entity_decl_handler)(void *user_data, const unsigned char* entityName, const unsigned char* base, const unsigned char* systemId, const unsigned char* publicId, const unsigned char* notationName);

/**
 * raptor_sax2_external_entity_ref_handler:
 * @user_data: user data
 * @context: context
 * @base: base URI
 * @systemId: system ID
 * @publicId: public ID
 *
 * SAX2 external entity reference handler
 * 
 * Return value: 0 if processing should not continue because of a
 * fatal error in the handling of the external entity.
 */
typedef int (*raptor_sax2_external_entity_ref_handler)(void *user_data, const unsigned char* context, const unsigned char* base, const unsigned char* systemId, const unsigned char* publicId);


/**
 * raptor_log_level:
 * @RAPTOR_LOG_LEVEL_NONE: Internal
 * @RAPTOR_LOG_LEVEL_FATAL: Fatal error message
 * @RAPTOR_LOG_LEVEL_ERROR: Error message
 * @RAPTOR_LOG_LEVEL_WARNING: Warning message
 * @RAPTOR_LOG_LEVEL_LAST: Internal
 *
 * Log levels
 */
typedef enum {
  RAPTOR_LOG_LEVEL_NONE,
  RAPTOR_LOG_LEVEL_FATAL,
  RAPTOR_LOG_LEVEL_ERROR,
  RAPTOR_LOG_LEVEL_WARNING,
  /* RAPTOR V2 FIXME - this enum list cannot be extended before V2
   * API is released else binary compatibility will be broken in the
   * #raptor_error_handlers structure - it causes an array to grow.
   */
  RAPTOR_LOG_LEVEL_LAST=RAPTOR_LOG_LEVEL_WARNING
} raptor_log_level;


/**
 * raptor_error_handlers:
 * @magic: magic value - must use raptor_error_handlers_init() to set this
 * @locator: raptor locator of the error
 * @last_log_level: number of log levels; size of @handlers arrays
 * @handlers: user handlers per log level
 * @world: raptor_world object
 *
 * Error handlers structure
 */
typedef struct {
  unsigned int magic;

  raptor_locator* locator;

  /* size of handlers array */
  raptor_log_level last_log_level;

  raptor_message_handler_closure handlers[RAPTOR_LOG_LEVEL_LAST+1];

  /* Raptor V2 FIXME - this should NOT be at the end of the structure
   * since it prevents increasing the size of the @handlers array but
   * it it is here to preserve Raptor V1 ABI.
   */
  raptor_world *world;
} raptor_error_handlers;

#ifndef RAPTOR_DISABLE_V1
RAPTOR_API RAPTOR_V1
void raptor_error_handlers_init(raptor_error_handlers* error_handlers);
#endif
#ifdef RAPTOR_V2_AVAILABLE
RAPTOR_API
void raptor_error_handlers_init_v2(raptor_world* world, raptor_error_handlers* error_handlers);
#endif


/* SAX2 API */
RAPTOR_API
raptor_sax2* raptor_new_sax2(void *user_data, raptor_error_handlers* error_handlers);
RAPTOR_API
void raptor_free_sax2(raptor_sax2 *sax2);

RAPTOR_API
void raptor_sax2_set_start_element_handler(raptor_sax2* sax2, raptor_sax2_start_element_handler handler);
RAPTOR_API
void raptor_sax2_set_end_element_handler(raptor_sax2* sax2, raptor_sax2_end_element_handler handler);
RAPTOR_API
void raptor_sax2_set_characters_handler(raptor_sax2* sax2, raptor_sax2_characters_handler handler);
RAPTOR_API
void raptor_sax2_set_cdata_handler(raptor_sax2* sax2, raptor_sax2_cdata_handler handler);
RAPTOR_API
void raptor_sax2_set_comment_handler(raptor_sax2* sax2, raptor_sax2_comment_handler handler);
RAPTOR_API
void raptor_sax2_set_unparsed_entity_decl_handler(raptor_sax2* sax2, raptor_sax2_unparsed_entity_decl_handler handler);
RAPTOR_API
void raptor_sax2_set_external_entity_ref_handler(raptor_sax2* sax2, raptor_sax2_external_entity_ref_handler handler);
RAPTOR_API
void raptor_sax2_set_namespace_handler(raptor_sax2* sax2, raptor_namespace_handler handler);
RAPTOR_API
void raptor_sax2_parse_start(raptor_sax2 *sax2, raptor_uri *base_uri);
RAPTOR_API
int raptor_sax2_parse_chunk(raptor_sax2* sax2, const unsigned char *buffer, size_t len, int is_end);
RAPTOR_API
const unsigned char* raptor_sax2_inscope_xml_language(raptor_sax2* sax2);
RAPTOR_API
raptor_uri* raptor_sax2_inscope_base_uri(raptor_sax2* sax2);

#ifdef __cplusplus
}
#endif

#endif
