diff options
Diffstat (limited to 'serd')
| -rw-r--r-- | serd/serd.h | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/serd/serd.h b/serd/serd.h index 711d668d..45b61a4a 100644 --- a/serd/serd.h +++ b/serd/serd.h @@ -73,6 +73,18 @@ typedef struct SerdCursorImpl SerdCursor; /// Lexical environment for relative URIs or CURIEs (base URI and namespaces) typedef struct SerdEnvImpl SerdEnv; +/// An indexed set of statements +typedef struct SerdModelImpl SerdModel; + +/// A statement sink that inserts into a model +typedef struct SerdInserterImpl SerdInserter; + +/// Model Iterator +typedef struct SerdIterImpl SerdIter; + +/// Model Range +typedef struct SerdRangeImpl SerdRange; + /// Streaming parser that reads a text stream and writes to a statement sink typedef struct SerdReaderImpl SerdReader; @@ -92,6 +104,7 @@ typedef enum { SERD_ERR_UNKNOWN, ///< Unknown error SERD_ERR_BAD_SYNTAX, ///< Invalid syntax SERD_ERR_BAD_ARG, ///< Invalid argument + SERD_ERR_BAD_ITER, ///< Use of invalidated iterator SERD_ERR_NOT_FOUND, ///< Not found SERD_ERR_ID_CLASH, ///< Encountered clashing blank node IDs SERD_ERR_BAD_CURIE, ///< Invalid CURIE (e.g. prefix does not exist) @@ -119,6 +132,14 @@ typedef enum { /// Bitwise OR of SerdStatementFlag values typedef uint32_t SerdStatementFlags; +/// Flags that control style for a model serialisation +typedef enum { + SERD_NO_INLINE_OBJECTS = 1 << 0 ///< Disable object inlining +} SerdSerialisationFlag; + +/// Bitwise OR of SerdStatementFlag values +typedef uint32_t SerdSerialisationFlags; + /** Type of a syntactic RDF node @@ -183,6 +204,21 @@ typedef enum { SERD_GRAPH = 3 ///< Graph ("context") } SerdField; +/// Indexing option +typedef enum { + SERD_INDEX_SPO = 1, ///< Subject, Predicate, Object + SERD_INDEX_SOP = 1 << 1, ///< Subject, Object, Predicate + SERD_INDEX_OPS = 1 << 2, ///< Object, Predicate, Subject + SERD_INDEX_OSP = 1 << 3, ///< Object, Subject, Predicate + SERD_INDEX_PSO = 1 << 4, ///< Predicate, Subject, Object + SERD_INDEX_POS = 1 << 5, ///< Predicate, Object, Subject + SERD_INDEX_GRAPHS = 1 << 6, ///< Support multiple graphs in model + SERD_STORE_CURSORS = 1 << 7 ///< Store original cursor of statements +} SerdModelFlag; + +/// Bitwise OR of SerdModelFlag values +typedef uint32_t SerdModelFlags; + /// A syntactic RDF node typedef struct SerdNodeImpl SerdNode; @@ -1329,10 +1365,266 @@ serd_nodes_deref(SerdNodes* nodes, const SerdNode* node); /** @} + @name Model + @{ +*/ + +/** + Create a new model + + @param world The world in which to make this model. + + @param flags Model options, including enabled indices, for example `SERD_SPO | + SERD_OPS`. Be sure to enable an index where the most significant node(s) + are not variables in your queries. For example, to make (? P O) queries, + enable either SERD_OPS or SERD_POS. +*/ +SERD_API +SerdModel* +serd_model_new(SerdWorld* world, SerdModelFlags flags); + +/// Return a deep copy of `model` +SERD_API +SerdModel* +serd_model_copy(const SerdModel* model); + +/// Return true iff `a` is equal to `b`, ignoring statement cursor metadata +SERD_API +bool +serd_model_equals(const SerdModel* a, const SerdModel* b); + +/// Close and free `model` +SERD_API +void +serd_model_free(SerdModel* model); + +/// Get the world associated with `model` +SERD_API +SerdWorld* +serd_model_get_world(SerdModel* model); + +/// Get the flags enabled on `model` +SERD_API +SerdModelFlags +serd_model_get_flags(const SerdModel* model); + +/// Return the number of statements stored in `model` +SERD_API +size_t +serd_model_size(const SerdModel* model); + +/// Return true iff there are no statements stored in `model` +SERD_API +bool +serd_model_empty(const SerdModel* model); + +/// Return an iterator to the start of `model` +SERD_API +SerdIter* +serd_model_begin(const SerdModel* model); + +/// Return an iterator to the end of `model` +SERD_API +const SerdIter* +serd_model_end(const SerdModel* model); + +/// Return a range of all statements in `model` +SERD_API +SerdRange* +serd_model_all(const SerdModel* model); + +/** + Search for statements by a quad pattern + + @return An iterator to the first match, or NULL if no matches found. +*/ +SERD_API +SerdIter* +serd_model_find(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/** + Search for statements by a quad pattern + + @return A range containins all matching statements. +*/ +SERD_API +SerdRange* +serd_model_range(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/** + Search for a single node that matches a pattern + + Exactly one of `s`, `p`, `o` must be NULL. + This function is mainly useful for predicates that only have one value. + @return The first matching node, or NULL if no matches are found. +*/ +SERD_API +const SerdNode* +serd_model_get(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/** + Search for a single statement that matches a pattern + + This function is mainly useful for predicates that only have one value. + + @return The first matching statement, or NULL if none are found. +*/ +SERD_API +const SerdStatement* +serd_model_get_statement(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/// Return true iff a statement exists +SERD_API +bool +serd_model_ask(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/// Return the number of matching statements +SERD_API +size_t +serd_model_count(const SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/** + Add a statement to a model from nodes + + This function fails if there are any active iterators on `model`. +*/ +SERD_API +SerdStatus +serd_model_add(SerdModel* model, + const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g); + +/** + Add a statement to a model + + This function fails if there are any active iterators on `model`. +*/ +SERD_API +SerdStatus +serd_model_insert(SerdModel* model, const SerdStatement* statement); + +/** + Add a range of statements to a model + + This function fails if there are any active iterators on `model`. +*/ +SERD_API +SerdStatus +serd_model_add_range(SerdModel* model, SerdRange* range); + +/** + Remove a quad from a model via an iterator + + Calling this function invalidates all iterators on `model` except `iter`. + + @param model The model which `iter` points to. + @param iter Iterator to the element to erase, which is incremented to the + next value on return. +*/ +SERD_API +SerdStatus +serd_model_erase(SerdModel* model, SerdIter* iter); + +/** + Remove a range from a model + + Calling this function invalidates all iterators on `model` except `iter`. + + @param model The model which `range` points to. + @param range Range to erase, which will be empty on return; +*/ +SERD_API +SerdStatus +serd_model_erase_range(SerdModel* model, SerdRange* range); + +/** + @} + @name Inserter + @{ +*/ + +/// Create an inserter for writing statements to a model +SERD_API +SerdInserter* +serd_inserter_new(SerdModel* model, + SerdEnv* env, + const SerdNode* default_graph); + +/// Free an inserter +SERD_API +void +serd_inserter_free(SerdInserter* inserter); + +/// Return a sink interface that adds statements via `inserter` +SERD_API +const SerdSink* +serd_inserter_get_sink(SerdInserter* inserter); + +/** + @} @name Statement @{ */ +/** + Create a new statement + + Note that, to minimise model overhead, statements do not own their nodes, so + they must have a longer lifetime than the statement for it to be valid. For + statements in models, this is the lifetime of the model. For user-created + statements, the simplest way to handle this is to use `SerdNodes`. + + @param s The subject + @param p The predicate ("key") + @param o The object ("value") + @param g The graph ("context") + @param cursor Optional cursor at the origin of this statement + @return A new statement that must be freed with serd_statement_free() +*/ +SERD_API +SerdStatement* +serd_statement_new(const SerdNode* s, + const SerdNode* p, + const SerdNode* o, + const SerdNode* g, + const SerdCursor* cursor); + +/// Return a copy of `statement` +SERD_API +SerdStatement* +serd_statement_copy(const SerdStatement* statement); + +/// Free `statement` +SERD_API +void +serd_statement_free(SerdStatement* statement); + /// Return the given node in `statement` SERD_API const SerdNode* @@ -1364,6 +1656,136 @@ const SerdCursor* serd_statement_get_cursor(const SerdStatement* statement); /** + Return true iff `a` is equal to `b`, ignoring statement cursor metadata + + Only returns true if nodes are equivalent, does not perform wildcard matching. +*/ +SERD_API +bool +serd_statement_equals(const SerdStatement* a, const SerdStatement* b); + +/** + Return true iff `statement` matches the given pattern + + The matching rules are the same used for querying: nodes match if they are + equivalent, and NULL acts as a wildcard that matches any node. +*/ +SERD_API +bool +serd_statement_matches(const SerdStatement* statement, + const SerdNode* subject, + const SerdNode* predicate, + const SerdNode* object, + const SerdNode* graph); + +/** + @} + @name Iterator + @{ +*/ + +/// Return a new copy of `iter` +SERD_API +SerdIter* +serd_iter_copy(const SerdIter* iter); + +/// Return the statement pointed to by `iter` +SERD_API +const SerdStatement* +serd_iter_get(const SerdIter* iter); + +/** + Increment `iter` to point to the next statement + + @return True iff `iter` has reached the end. +*/ +SERD_API +bool +serd_iter_next(SerdIter* iter); + +/// Return true iff `lhs` is equal to `rhs` +SERD_API +bool +serd_iter_equals(const SerdIter* lhs, const SerdIter* rhs); + +/// Free `iter` +SERD_API +void +serd_iter_free(SerdIter* iter); + +/** + @} + @name Range + @{ +*/ + +/// Return a new copy of `range` +SERD_API +SerdRange* +serd_range_copy(const SerdRange* range); + +/// Free `range` +SERD_API +void +serd_range_free(SerdRange* range); + +/// Return the first statement in `range`, or NULL if `range` is empty +SERD_API +const SerdStatement* +serd_range_front(const SerdRange* range); + +/// Return true iff `lhs` is equal to `rhs` +SERD_API +bool +serd_range_equals(const SerdRange* lhs, const SerdRange* rhs); + +/// Increment the start of `range` to point to the next statement +SERD_API +bool +serd_range_next(SerdRange* range); + +/// Return true iff there are no statements in `range` +SERD_API +bool +serd_range_empty(const SerdRange* range); + +/// Return an iterator to the start of `range` +SERD_API +const SerdIter* +serd_range_cbegin(const SerdRange* range); + +/// Return an iterator to the end of `range` +SERD_API +const SerdIter* +serd_range_cend(const SerdRange* range); + +/// Return an iterator to the start of `range` +SERD_API +SerdIter* +serd_range_begin(SerdRange* range); + +/// Return an iterator to the end of `range` +SERD_API +SerdIter* +serd_range_end(SerdRange* range); + +/** + Write `range` to `sink` + + The serialisation style can be controlled with `flags`. The default is to + write statements in an order suited for pretty-printing with Turtle or TriG + with as many objects written inline as possible. If + `SERD_NO_INLINE_OBJECTS` is given, a simple sorted stream is written + instead, which is significantly faster since no searching is required, but + can result in ugly output for Turtle or Trig. +*/ +SERD_API +SerdStatus +serd_range_serialise(const SerdRange* range, + const SerdSink* sink, + SerdSerialisationFlags flags); + +/** @} @name Cursor @{ |