/*
Copyright 2011-2020 David Robillard <d@drobilla.net>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/// @file serd.h API for Serd, a lightweight RDF syntax library
#ifndef SERD_SERD_H
#define SERD_SERD_H
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#if defined(_WIN32) && !defined(SERD_STATIC) && defined(SERD_INTERNAL)
# define SERD_API __declspec(dllexport)
#elif defined(_WIN32) && !defined(SERD_STATIC)
# define SERD_API __declspec(dllimport)
#elif defined(__GNUC__)
# define SERD_API __attribute__((visibility("default")))
#else
# define SERD_API
#endif
#ifdef __GNUC__
# define SERD_PURE_FUNC __attribute__((pure))
# define SERD_CONST_FUNC __attribute__((const))
# define SERD_MALLOC_FUNC __attribute__((malloc))
#else
# define SERD_PURE_FUNC
# define SERD_CONST_FUNC
# define SERD_MALLOC_FUNC
#endif
#if defined(__clang__) && __clang_major__ >= 7
# define SERD_NONNULL _Nonnull
# define SERD_NULLABLE _Nullable
# define SERD_ALLOCATED _Null_unspecified
#else
# define SERD_NONNULL
# define SERD_NULLABLE
# define SERD_ALLOCATED
#endif
#define SERD_PURE_API \
SERD_API \
SERD_PURE_FUNC
#define SERD_CONST_API \
SERD_API \
SERD_CONST_FUNC
#define SERD_MALLOC_API \
SERD_API \
SERD_MALLOC_FUNC
#ifdef __cplusplus
extern "C" {
# if defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
# endif
#endif
/**
@defgroup serd Serd C API
This is the complete public C API of serd.
@{
*/
/// Global library state
typedef struct SerdWorldImpl SerdWorld;
/// Hashing node container for interning and simplified memory management
typedef struct SerdNodesImpl SerdNodes;
/// A subject, predicate, and object, with optional graph context
typedef struct SerdStatementImpl SerdStatement;
/// The origin of a statement in a document
typedef struct SerdCursorImpl SerdCursor;
/// Lexical environment for relative URIs or CURIEs (base URI and namespaces)
typedef struct SerdEnvImpl SerdEnv;
/// Streaming parser that reads a text stream and writes to a sink
typedef struct SerdReaderImpl SerdReader;
/// Streaming serialiser that writes a text stream as statements are pushed
typedef struct SerdWriterImpl SerdWriter;
/// An interface that receives a stream of RDF data
typedef struct SerdSinkImpl SerdSink;
/// Return status code
typedef enum {
SERD_SUCCESS, ///< No error
SERD_FAILURE, ///< Non-fatal failure
SERD_ERR_UNKNOWN, ///< Unknown error
SERD_ERR_BAD_SYNTAX, ///< Invalid syntax
SERD_ERR_BAD_ARG, ///< Invalid argument
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)
SERD_ERR_INTERNAL, ///< Unexpected internal error (should not happen)
SERD_ERR_OVERFLOW, ///< Stack overflow
SERD_ERR_NO_DATA, ///< Unexpected end of input
SERD_ERR_BAD_TEXT, ///< Invalid text encoding
SERD_ERR_BAD_WRITE, ///< Error writing to file/stream
SERD_ERR_BAD_CALL, ///< Invalid call
} SerdStatus;
/// RDF syntax type
typedef enum {
SERD_SYNTAX_EMPTY = 0, ///< Empty syntax (suppress input or output)
SERD_TURTLE = 1, ///< Terse triples http://www.w3.org/TR/turtle
SERD_NTRIPLES = 2, ///< Flat triples http://www.w3.org/TR/n-triples/
SERD_NQUADS = 3, ///< Flat quads http://www.w3.org/TR/n-quads/
SERD_TRIG = 4 ///< Terse quads http://www.w3.org/TR/trig/
} SerdSyntax;
/// Flags indicating inline abbreviation information for a statement
typedef enum {
SERD_EMPTY_S = 1u << 0u, ///< Empty blank node subject
SERD_ANON_S = 1u << 1u, ///< Start of anonymous subject
SERD_ANON_O = 1u << 2u, ///< Start of anonymous object
SERD_LIST_S = 1u << 3u, ///< Start of list subject
SERD_LIST_O = 1u << 4u, ///< Start of list object
SERD_TERSE_S = 1u << 5u, ///< Terse serialisation of new subject
SERD_TERSE_O = 1u << 6u ///< Terse serialisation of new object
} SerdStatementFlag;
/// Bitwise OR of SerdStatementFlag values
typedef uint32_t SerdStatementFlags;
/**
Type of a node.
An RDF node, in the abstract sense, can be either a resource, literal, or a
blank. This type is more precise, because syntactically there are two ways
to refer to a resource (by URI or CURIE). Serd also has support for
variable nodes to support some features, which are not RDF nodes.
There are also two ways to refer to a blank node in syntax (by ID or
anonymously), but this is handled by statement flags rather than distinct
node types.
*/
typedef enum {
/**
Literal value.
A literal optionally has either a language, or a datatype (not both).
*/
SERD_LITERAL = 1,
/**
URI (absolute or relative).
Value is an unquoted URI string, which is either a relative reference
with respect to the current base URI (e.g. "foo/bar"), or an absolute
URI (e.g. "http://example.org/foo").
@see [RFC3986](http://tools.ietf.org/html/rfc3986)
*/
SERD_URI = 2,
/**
CURIE, a shortened URI.
Value is an unquoted CURIE string relative to the current environment,
e.g. "rdf:type". @see [CURIE Syntax 1.0](http://www.w3.org/TR/curie)
*/
SERD_CURIE = 3,
/**
A blank node.
Value is a blank node ID without any syntactic prefix, like "id3", which
is meaningful only within this serialisation. @see [RDF 1.1
Turtle](http://www.w3.org/TR/turtle/#grammar-production-BLANK_NODE_LABEL)
*/
SERD_BLANK = 4,
/**
A variable node
Value is a variable name without any syntactic prefix, like "name",
which is meaningful only within this serialisation. @see [SPARQL 1.1
Query Language](https://www.w3.org/TR/sparql11-query/#rVar)
*/
SERD_VARIABLE = 5
} SerdNodeType;
/// Flags indicating certain string properties relevant to serialisation
typedef enum {
SERD_HAS_NEWLINE = 1u << 0u, ///< Contains line breaks ('\\n' or '\\r')
SERD_HAS_QUOTE = 1u << 1u, ///< Contains quotes ('"')
SERD_HAS_DATATYPE = 1u << 2u, ///< Literal node has datatype
SERD_HAS_LANGUAGE = 1u << 3u ///< Literal node has language
} SerdNodeFlag;
/// Bitwise OR of SerdNodeFlag values
typedef uint32_t SerdNodeFlags;
/// Index of a node in a statement
typedef enum {
SERD_SUBJECT = 0, ///< Subject
SERD_PREDICATE = 1, ///< Predicate ("key")
SERD_OBJECT = 2, ///< Object ("value")
SERD_GRAPH = 3 ///< Graph ("context")
} SerdField;
/// A syntactic RDF node
typedef struct SerdNodeImpl SerdNode;
/// An unterminated immutable slice of a string
typedef struct {
const char* SERD_NULLABLE buf; ///< Start of chunk
size_t len; ///< Length of chunk in bytes
} SerdStringView;
#ifdef __cplusplus
# define SERD_EMPTY_STRING(str) \
SerdStringView { "", 0 }
# define SERD_STATIC_STRING(str) \
SerdStringView { (str), sizeof(str) - 1 }
# define SERD_MEASURE_STRING(str) \
SerdStringView { (str), (str) ? strlen(str) : 0 }
# define SERD_STRING_VIEW(str, len) \
SerdStringView { (str), (len) }
#else
# define SERD_EMPTY_STRING(str) \
(SerdStringView) { "", 0 }
# define SERD_STATIC_STRING(str) \
(SerdStringView) { (str), sizeof(str) - 1 }
# define SERD_MEASURE_STRING(str) \
(SerdStringView) { (str), (str != NULL) ? strlen(str) : 0 }
# define SERD_STRING_VIEW(str, len) \
(SerdStringView) { (str), (len) }
#endif
/// A mutable buffer in memory
typedef struct {
void* SERD_NULLABLE buf; ///< Buffer
size_t len; ///< Size of buffer in bytes
} SerdBuffer;
/// An error description
typedef struct {
SerdStatus status; ///< Error code
const SerdCursor* SERD_NULLABLE cursor; ///< Origin of error
const char* SERD_NONNULL fmt; ///< Printf-style format string
va_list* SERD_NONNULL args; ///< Arguments for fmt
} SerdError;
/**
A parsed URI.
This URI representation is designed for fast streaming, it allows creating
relative URI references or resolving them into absolute URIs in-place
without any string allocation.
Each component refers to slices in other strings, so a URI view must outlive
any strings it was parsed from. The components are not necessarily
null-terminated.
The scheme, authority, path, query, and fragment simply point to the string
value of those components, not including any delimiters. The path_prefix is
a special component for storing relative or resolved paths. If it points to
a string (usually a base URI the URI was resolved against), then this string
is prepended to the path. Otherwise, the length is interpret as the number
of up-references ("../") that must be prepended to the path.
*/
typedef struct {
SerdStringView scheme; ///< Scheme
SerdStringView authority; ///< Authority
SerdStringView path_prefix; ///< Path prefix for relative/resolved paths
SerdStringView path; ///< Path suffix
SerdStringView query; ///< Query
SerdStringView fragment; ///< Fragment
} SerdURIView;
/// Reader options
typedef enum {
SERD_READ_LAX = 1u << 0u, ///< Tolerate invalid input where possible
SERD_READ_VARIABLES = 1u << 1u, ///< Support variable nodes
SERD_READ_EXACT_BLANKS = 1u << 2u, ///< Allow clashes with generated blanks
} SerdReaderFlag;
/// Bitwise OR of SerdReaderFlag values
typedef uint32_t SerdReaderFlags;
/**
Writer style options.
These flags allow more precise control of writer output style. Note that
some options are only supported for some syntaxes, for example, NTriples
does not support abbreviation and is always ASCII.
*/
typedef enum {
SERD_WRITE_ASCII = 1u << 0u, ///< Escape all non-ASCII characters
SERD_WRITE_UNQUALIFIED = 1u << 1u, ///< Do not shorten URIs into CURIEs
SERD_WRITE_UNRESOLVED = 1u << 2u, ///< Do not make URIs relative
SERD_WRITE_TERSE = 1u << 3u, ///< Write terser output without newlines
SERD_WRITE_LAX = 1u << 4u ///< Tolerate lossy output
} SerdWriterFlag;
/// Bitwise OR of SerdWriterFlag values
typedef uint32_t SerdWriterFlags;
/**
Free memory allocated by Serd
This function exists because some systems require memory allocated by a
library to be freed by code in the same library. It is otherwise equivalent
to the standard C free() function.
*/
SERD_API
void
serd_free(void* SERD_NULLABLE ptr);
/**
@defgroup serd_string String Utilities
@{
*/
/// Return a string describing a status code
SERD_CONST_API
const char* SERD_NONNULL
serd_strerror(SerdStatus status);
/**
Measure a UTF-8 string.
@return Length of `str` in bytes.
@param str A null-terminated UTF-8 string.
@param flags (Output) Set to the applicable flags.
*/
SERD_API
size_t
serd_strlen(const char* SERD_NONNULL str, SerdNodeFlags* SERD_NULLABLE flags);
/**
Decode a base64 string.
This function can be used to deserialise a blob node created with
serd_new_blob().
@param str Base64 string to decode.
@param len The length of `str`.
@param size Set to the size of the returned blob in bytes.
@return A newly allocated blob which must be freed with serd_free().
*/
SERD_API
void* SERD_ALLOCATED
serd_base64_decode(const char* SERD_NONNULL str,
size_t len,
size_t* SERD_NONNULL size);
/**
@}
@defgroup serd_byte_source Byte Source
@{
*/
/// A source for bytes that provides text input
typedef struct SerdByteSourceImpl SerdByteSource;
/**
Function to detect I/O stream errors.
Identical semantics to `ferror`.
@return Non-zero if `stream` has encountered an error.
*/
typedef int (*SerdStreamErrorFunc)(void* SERD_NONNULL stream);
/**
Source function for raw string input.
Identical semantics to `fread`, but may set errno for more informative error
reporting than supported by SerdStreamErrorFunc.
@param buf Output buffer.
@param size Size of a single element of data in bytes (always 1).
@param nmemb Number of elements to read.
@param stream Stream to read from (FILE* for fread).
@return Number of elements (bytes) read, which is short on error.
*/
typedef size_t (*SerdReadFunc)(void* SERD_NONNULL buf,
size_t size,
size_t nmemb,
void* SERD_NONNULL stream);
/**
Create a new byte source that reads from a string.
@param string Null-terminated UTF-8 string to read from.
@param name Optional name of stream for error messages (string or URI).
*/
SERD_API
SerdByteSource* SERD_ALLOCATED
serd_byte_source_new_string(const char* SERD_NONNULL string,
const SerdNode* SERD_NULLABLE name);
/**
Create a new byte source that reads from a file.
An arbitrary `FILE*` can be used via serd_byte_source_new_function() as
well, this is just a convenience function that opens the file properly,
sets flags for optimized I/O if possible, and automatically sets the name of
the source to the file path.
@param path Path of file to open and read from.
@param block_size Number of bytes to read per call.
*/
SERD_API
SerdByteSource* SERD_ALLOCATED
serd_byte_source_new_filename(const char* SERD_NONNULL path, size_t block_size);
/**
Create a new byte source that reads from a user-specified function
The `stream` will be passed to the `read_func`, which is compatible with
the standard C `fread` if `stream` is a `FILE*`. Note that the serd Reader
only ever reads individual bytes at a time, that is, the `size` parameter
will always be 1 (but `nmemb` may be higher).
@param read_func Function called with bytes to consume.
@param error_func Stream error function with `ferror` semantics.
@param stream Context parameter passed to `read_func` and `error_func`.
@param name Optional name of stream for error messages (string or URI).
@param block_size Number of bytes to read per call.
*/
SERD_API
SerdByteSource* SERD_ALLOCATED
serd_byte_source_new_function(SerdReadFunc SERD_NONNULL read_func,
SerdStreamErrorFunc SERD_NONNULL error_func,
void* SERD_NULLABLE stream,
const SerdNode* SERD_NULLABLE name,
size_t block_size);
/// Free `source`
SERD_API
void
serd_byte_source_free(SerdByteSource* SERD_NULLABLE source);
/**
@}
@defgroup serd_byte_sink Byte Sink
@{
*/
/// A sink for bytes that receives text output
typedef struct SerdByteSinkImpl SerdByteSink;
/**
Sink function for raw string output
Identical semantics to `fwrite`, but may set errno for more informative
error reporting than supported by SerdStreamErrorFunc.
@param buf Input buffer.
@param size Size of a single element of data in bytes (always 1).
@param nmemb Number of elements to read.
@param stream Stream to write to (FILE* for fread).
@return Number of elements (bytes) written, which is short on error.
*/
typedef size_t (*SerdWriteFunc)(const void* SERD_NONNULL buf,
size_t size,
size_t nmemb,
void* SERD_NONNULL stream);
/**
Create a new byte sink that writes to a buffer.
The `buffer` is owned by the caller, but will be expanded as necessary.
@param buffer Buffer to write output to.
*/
SERD_API
SerdByteSink* SERD_ALLOCATED
serd_byte_sink_new_buffer(SerdBuffer* SERD_NONNULL buffer);
/**
Create a new byte sink that writes to a file
An arbitrary `FILE*` can be used via serd_byte_sink_new_function() as well,
this is just a convenience function that opens the file properly and sets
flags for optimized I/O if possible.
@param path Path of file to open and write to.
@param block_size Number of bytes to write per call.
*/
SERD_API
SerdByteSink* SERD_ALLOCATED
serd_byte_sink_new_filename(const char* SERD_NONNULL path, size_t block_size);
/**
Create a new byte sink that writes to a user-specified function.
The `stream` will be passed to the `write_func`, which is compatible with
the standard C `fwrite` if `stream` is a `FILE*`.
@param write_func Function called with bytes to consume.
@param stream Context parameter passed to `sink`.
@param block_size Number of bytes to write per call.
*/
SERD_API
SerdByteSink* SERD_ALLOCATED
serd_byte_sink_new_function(SerdWriteFunc SERD_NONNULL write_func,
void* SERD_NULLABLE stream,
size_t block_size);
/// Flush any pending output in `sink` to the underlying write function
SERD_API
void
serd_byte_sink_flush(SerdByteSink* SERD_NONNULL sink);
/**
Close `sink`, including the underlying file if necessary.
If `sink` was created with serd_byte_sink_new_filename(), then the file is
closed. If there was an error, then SERD_ERR_UNKNOWN is returned and
`errno` is set.
*/
SERD_API
SerdStatus
serd_byte_sink_close(SerdByteSink* SERD_NONNULL sink);
/// Free `sink`, flushing and closing first if necessary
SERD_API
void
serd_byte_sink_free(SerdByteSink* SERD_NULLABLE sink);
/**
@}
@defgroup serd_syntax Syntax Utilities
@{
*/
/**
Get a syntax by name.
Case-insensitive, supports "Turtle", "NTriples", "NQuads", and "TriG".
`SERD_SYNTAX_EMPTY` is returned if the name is not recognized.
*/
SERD_PURE_API
SerdSyntax
serd_syntax_by_name(const char* SERD_NONNULL name);
/**
Guess a syntax from a filename.
This uses the file extension to guess the syntax of a file.
`SERD_SYNTAX_EMPTY` is returned if the extension is not recognized.
*/
SERD_PURE_API
SerdSyntax
serd_guess_syntax(const char* SERD_NONNULL filename);
/**
Return whether a syntax can represent multiple graphs.
@return True for SERD_NQUADS and SERD_TRIG, false otherwise.
*/
SERD_CONST_API
bool
serd_syntax_has_graphs(SerdSyntax syntax);
/**
@}
@defgroup serd_uri URI
@{
*/
static const SerdURIView SERD_URI_NULL =
{{NULL, 0}, {NULL, 0}, {NULL, 0}, {NULL, 0}, {NULL, 0}, {NULL, 0}};
/// Return true iff `string` starts with a valid URI scheme
SERD_PURE_API
bool
serd_uri_string_has_scheme(const char* SERD_NONNULL string);
/// Parse `string` and return a URI view that points into it
SERD_API
SerdURIView
serd_parse_uri(const char* SERD_NONNULL string);
/**
Get the unescaped path and hostname from a file URI.
The returned path and `*hostname` must be freed with serd_free().
@param uri A file URI.
@param hostname If non-NULL, set to the hostname, if present.
@return A filesystem path.
*/
SERD_API
char* SERD_NULLABLE
serd_parse_file_uri(const char* SERD_NONNULL uri,
char* SERD_NONNULL* SERD_NULLABLE hostname);
/**
Return reference `r` resolved against `base`.
This will make `r` an absolute URI if possible.
@see [RFC3986 5.2.2](http://tools.ietf.org/html/rfc3986#section-5.2.2)
@param r URI reference to make absolute, for example "child/path".
@param base Base URI, for example "http://example.org/base/".
@return An absolute URI, for example "http://example.org/base/child/path",
or `r` if it is not a URI reference that can be resolved against `base`.
*/
SERD_API
SerdURIView
serd_resolve_uri(SerdURIView r, SerdURIView base);
/**
Return `r` as a reference relative to `base` if possible.
@see [RFC3986 5.2.2](http://tools.ietf.org/html/rfc3986#section-5.2.2)
@param r URI to make relative, for example
"http://example.org/base/child/path".
@param base Base URI, for example "http://example.org/base".
@return A relative URI reference, for example "child/path", `r` if it can
not be made relative to `base`, or a null URI if `r` could be made relative
to base, but the path prefix is already being used (most likely because `r`
was previously a relative URI reference that was resolved against some
base).
*/
SERD_API
SerdURIView
serd_relative_uri(SerdURIView r, SerdURIView base);
/**
Return whether `r` can be written as a reference relative to `base`.
For example, with `base` "http://example.org/base/", this returns true if
`r` is also "http://example.org/base/", or something like
"http://example.org/base/child" ("child")
"http://example.org/base/child/grandchild#fragment"
("child/grandchild#fragment"),
"http://example.org/base/child/grandchild?query" ("child/grandchild?query"),
and so on.
@return True if `r` and `base` are equal or if `r` is a child of `base`.
*/
SERD_API
bool
serd_uri_is_within(SerdURIView r, SerdURIView base);
/**
Return the length of `uri` as a string.
This can be used to get the expected number of bytes that will be written by
serd_write_uri().
@return A string length in bytes, not including the null terminator.
*/
SERD_API
size_t
serd_uri_string_length(SerdURIView uri);
/**
Write `uri` as a string to `sink`.
This will call `sink` several times to emit the serialised URI.
@param uri URI to write as a string.
@param sink Sink to write string output to.
@param stream Opaque user argument to pass to `sink`.
@return The number of bytes written, which is less than
`serd_uri_string_length(uri)` on error.
*/
SERD_API
size_t
serd_write_uri(SerdURIView uri,
SerdWriteFunc SERD_NONNULL sink,
void* SERD_NONNULL stream);
/**
@}
@defgroup serd_node Node
@{
*/
/**
Create a node from a string representation in `syntax`.
The string should be a node as if written as an object in the given syntax,
without any extra quoting or punctuation, which is the format returned by
serd_node_to_syntax(). These two functions, when used with #SERD_TURTLE,
can be used to round-trip any node to a string and back.
@param str String representation of a node.
@param syntax Syntax to use. Should be either SERD_TURTLE or SERD_NTRIPLES
(the others are redundant). Note that namespaced (CURIE) nodes and relative
URIs can not be expressed in NTriples.
@return A newly allocated node that must be freed with serd_node_free().
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_node_from_syntax(const char* SERD_NONNULL str, SerdSyntax syntax);
/**
Return a string representation of `node` in `syntax`.
The returned string represents that node as if written as an object in the
given syntax, without any extra quoting or punctuation.
@param node Node to serialise.
@param syntax Syntax to use. Should be either SERD_TURTLE or SERD_NTRIPLES
(the others are redundant). Note that namespaced (CURIE) nodes and relative
URIs can not be expressed in NTriples.
@return A newly allocated string that must be freed with serd_free().
*/
SERD_API
char* SERD_ALLOCATED
serd_node_to_syntax(const SerdNode* SERD_NONNULL node, SerdSyntax syntax);
/**
Create a new "simple" node that is just a string.
This can be used to create blank, CURIE, or URI nodes from an already
measured string or slice of a buffer, which avoids a strlen compared to the
friendly constructors. This may not be used for literals since those must
be measured to set the SERD_HAS_NEWLINE and SERD_HAS_QUOTE flags.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_simple_node(SerdNodeType type, SerdStringView string);
/// Create a new plain literal string node from `str`
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_string(SerdStringView string);
/**
Create a new literal node from `str`.
A plain literal has no datatype, but may have a language tag. The `lang`
may be NULL, in which case this is equivalent to `serd_new_string()`.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_plain_literal(SerdStringView str, SerdStringView lang);
/**
Create a new typed literal node from `str`.
A typed literal has no language tag, but may have a datatype. The
`datatype` may be NULL, in which case this is equivalent to
`serd_new_string()`.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_typed_literal(SerdStringView str, SerdStringView datatype_uri);
/// Create a new blank node
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_blank(SerdStringView string);
/// Create a new CURIE node
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_curie(SerdStringView string);
/// Create a new URI from a string
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_uri(SerdStringView string);
/// Create a new URI from a URI view
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_parsed_uri(SerdURIView uri);
/**
Create a new file URI node from a file system path and optional hostname.
Backslashes in Windows paths will be converted, and other characters will be
percent encoded as necessary.
If `path` is relative, `hostname` is ignored.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_file_uri(SerdStringView path, SerdStringView hostname);
/// Create a new node by serialising `b` into an xsd:boolean string
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_boolean(bool b);
/**
Create a new file URI node for a file that exists on this system.
This is like serd_new_file_uri() except it resolves and canonicalizes the
path, so the returned node is always a complete file URI with a scheme and
absolute path that does not contain any dot references or links, or NULL if
this is impossible (for example, because the path does not exist).
This should be used wherever the URI for an existent file is required, for
example to set the base URI of a document.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_real_file_uri(const char* SERD_NULLABLE path,
const char* SERD_NULLABLE hostname);
/**
Create a new node by serialising `d` into an xsd:decimal string
The resulting node will always contain a `.', start with a digit, and end
with a digit (a leading and/or trailing `0` will be added if necessary). It
will never be in scientific notation.
@param d The value for the new node.
@param datatype Datatype of node, or NULL for xsd:decimal.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_decimal(double d, const SerdNode* SERD_NULLABLE datatype);
/**
Create a new node by serialising `d` into a normalised xsd:double string.
The returned node will always be in normalised scientific notation, like
"1.23E4", except for NaN and negative/positive infinity, which are "NaN",
"-INF", and "INF", respectively.
Uses the shortest possible representation that precisely describes `d`,
which has at most 17 significant digits (under 24 characters total).
@param d Double value to serialise.
@return A literal node with datatype xsd:double.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_double(double d);
/**
Create a new node by serialising `f` into a normalised xsd:float string.
Uses identical formatting to serd_new_double(), except with at most 9
significant digits (under 14 characters total).
@param f Float value of literal.
@return A literal node with datatype xsd:float.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_float(float f);
/**
Create a new node by writing `i` as an xsd:integer string.
@param i Integer value of literal.
@param datatype Datatype of node, or NULL for xsd:integer.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_integer(int64_t i, const SerdNode* SERD_NULLABLE datatype);
/**
Create a node by serialising `buf` into an xsd:base64Binary string
This function can be used to make a serialisable node out of arbitrary
binary data, which can be decoded using serd_base64_decode().
@param buf Raw binary input data.
@param size Size of `buf`.
@param datatype Datatype of node, or NULL for xsd:base64Binary.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_new_blob(const void* SERD_NONNULL buf,
size_t size,
const SerdNode* SERD_NULLABLE datatype);
/**
Return the value of `node` as a boolean.
This will work for booleans, and numbers of any datatype if they are 0 or
1.
@return The value of `node` as a `bool`, or `false` on error.
*/
SERD_API
bool
serd_get_boolean(const SerdNode* SERD_NONNULL node);
/**
Return the value of `node` as a double.
This will coerce numbers of any datatype to double, if the value fits.
@return The value of `node` as a `double`, or NaN on error.
*/
SERD_API
double
serd_get_double(const SerdNode* SERD_NONNULL node);
/**
Return the value of `node` as a float.
This will coerce numbers of any datatype to float, if the value fits.
@return The value of `node` as a `float`, or NaN on error.
*/
SERD_API
float
serd_get_float(const SerdNode* SERD_NONNULL node);
/**
Return the value of `node` as a long (signed 64-bit integer).
This will coerce numbers of any datatype to long, if the value fits.
@return The value of `node` as a `int64_t`, or 0 on error.
*/
SERD_API
int64_t
serd_get_integer(const SerdNode* SERD_NONNULL node);
/// Return a deep copy of `node`
SERD_API
SerdNode* SERD_ALLOCATED
serd_node_copy(const SerdNode* SERD_NULLABLE node);
/// Free any data owned by `node`
SERD_API
void
serd_node_free(SerdNode* SERD_NULLABLE node);
/// Return the type of a node (SERD_URI, SERD_BLANK, or SERD_LITERAL)
SERD_PURE_API
SerdNodeType
serd_node_type(const SerdNode* SERD_NONNULL node);
/// Return the string value of a node
SERD_CONST_API
const char* SERD_NONNULL
serd_node_string(const SerdNode* SERD_NONNULL node);
/// Return the length of the string value of a node in bytes
SERD_PURE_API
size_t
serd_node_length(const SerdNode* SERD_NULLABLE node);
/**
Return a view of the string in a node.
This is a convenience wrapper for serd_node_string() and serd_node_length()
that can be used to get both in a single call.
*/
SERD_PURE_API
SerdStringView
serd_node_string_view(const SerdNode* SERD_NONNULL node);
/**
Return a parsed view of the URI in a node.
It is best to check the node type before calling this function, though it is
safe to call on non-URI nodes. In that case, it will return a null view
with all fields zero.
Note that this parses the URI string contained in the node, so it is a good
idea to keep the value if you will be using it several times in the same
scope.
*/
SERD_API
SerdURIView
serd_node_uri_view(const SerdNode* SERD_NONNULL node);
/// Return the flags (string properties) of a node
SERD_PURE_API
SerdNodeFlags
serd_node_flags(const SerdNode* SERD_NONNULL node);
/// Return the datatype of a literal node, or NULL
SERD_PURE_API
const SerdNode* SERD_NULLABLE
serd_node_datatype(const SerdNode* SERD_NONNULL node);
/// Return the language tag of a literal node, or NULL
SERD_PURE_API
const SerdNode* SERD_NULLABLE
serd_node_language(const SerdNode* SERD_NONNULL node);
/// Return true iff `a` is equal to `b`
SERD_PURE_API
bool
serd_node_equals(const SerdNode* SERD_NULLABLE a,
const SerdNode* SERD_NULLABLE b);
/**
@}
@defgroup serd_event Event Handlers
@{
*/
/**
Callback function for errors.
@param handle Handle for user data.
@param error Error description.
*/
typedef SerdStatus (*SerdErrorFunc)(void* SERD_NULLABLE handle,
const SerdError* SERD_NONNULL error);
/// Type of a SerdEvent
typedef enum {
SERD_BASE = 1, ///< Base URI changed
SERD_PREFIX = 2, ///< New URI prefix
SERD_STATEMENT = 3, ///< Statement
SERD_END = 4 ///< End of anonymous node
} SerdEventType;
/**
Event for base URI changes
Emitted whenever the base URI of the serialisation changes.
*/
typedef struct {
SerdEventType type; ///< #SERD_BASE
const SerdNode* SERD_NONNULL uri; ///< Base URI
} SerdBaseEvent;
/**
Event for namespace definitions
Emitted whenever a prefix is defined in the serialisation.
*/
typedef struct {
SerdEventType type; ///< #SERD_PREFIX
const SerdNode* SERD_NONNULL name; ///< Prefix name
const SerdNode* SERD_NONNULL uri; ///< Namespace URI
} SerdPrefixEvent;
/**
Event for statements
Emitted for every RDF statement in the serialisation.
*/
typedef struct {
SerdEventType type; ///< #SERD_STATEMENT
SerdStatementFlags flags; ///< Flags for pretty-printing
const SerdStatement* SERD_NONNULL statement; ///< Statement
} SerdStatementEvent;
/**
Event for the end of anonymous node descriptions
This is emitted to indicate that the anonymous node with the given
`value` will no longer be referred to by any future statements
(i.e. the anonymous serialisation of the node is finished).
*/
typedef struct {
SerdEventType type; ///< #SERD_END
const SerdNode* SERD_NONNULL node; ///< Anonymous node that is finished
} SerdEndEvent;
/**
An event in a data stream
Streams of data are represented as a series of events. Events represent
everything that can occur in an RDF document, and are used to plumb together
different components. For example, when parsing a document, a reader emits
a stream of events which can be sent to a writer to serialise a document, or
to an inserter to build a model in memory.
*/
typedef union {
SerdEventType type; ///< Event type (always set)
SerdBaseEvent base; ///< Base URI changed
SerdPrefixEvent prefix; ///< New namespace prefix
SerdStatementEvent statement; ///< Statement
SerdEndEvent end; ///< End of anonymous node
} SerdEvent;
/// Function for handling events
typedef SerdStatus (*SerdEventFunc)(void* SERD_NULLABLE handle,
const SerdEvent* SERD_NONNULL event);
/**
@}
@defgroup serd_world World
@{
*/
/**
Create a new Serd World.
It is safe to use multiple worlds in one process, though no objects can be
shared between worlds.
*/
SERD_MALLOC_API
SerdWorld* SERD_ALLOCATED
serd_world_new(void);
/// Free `world`
SERD_API
void
serd_world_free(SerdWorld* SERD_NULLABLE world);
/**
Return the nodes cache in `world`.
The returned cache is owned by the world and contains various nodes used
frequently by the implementation. For convenience, it may be used to store
additional nodes which will be freed when the world is freed.
*/
SERD_PURE_API
SerdNodes* SERD_NONNULL
serd_world_nodes(SerdWorld* SERD_NONNULL world);
/**
Return a unique blank node.
The returned node is valid only until the next time serd_world_get_blank()
is called or the world is destroyed.
*/
SERD_API
const SerdNode* SERD_NONNULL
serd_world_get_blank(SerdWorld* SERD_NONNULL world);
/**
Set a function to be called when errors occur.
The `error_func` will be called with `handle` as its first argument. If
no error function is set, errors are printed to stderr.
*/
SERD_API
void
serd_world_set_error_func(SerdWorld* SERD_NONNULL world,
SerdErrorFunc SERD_NULLABLE error_func,
void* SERD_NULLABLE handle);
/**
@}
@defgroup serd_env Environment
@{
*/
/// Create a new environment
SERD_API
SerdEnv* SERD_ALLOCATED
serd_env_new(SerdStringView base_uri);
/// Copy an environment
SERD_API
SerdEnv* SERD_ALLOCATED
serd_env_copy(const SerdEnv* SERD_NULLABLE env);
/// Return true iff `a` is equal to `b`
SERD_PURE_API
bool
serd_env_equals(const SerdEnv* SERD_NULLABLE a, const SerdEnv* SERD_NULLABLE b);
/// Free `env`
SERD_API
void
serd_env_free(SerdEnv* SERD_NULLABLE env);
/// Get the current base URI
SERD_PURE_API
const SerdNode* SERD_NULLABLE
serd_env_base_uri(const SerdEnv* SERD_NULLABLE env);
/// Set the current base URI
SERD_API
SerdStatus
serd_env_set_base_uri(SerdEnv* SERD_NONNULL env, SerdStringView uri);
/**
Set a namespace prefix
A namespace prefix is used to expand CURIE nodes, for example, with the
prefix "xsd" set to "http://www.w3.org/2001/XMLSchema#", "xsd:decimal" will
expand to "http://www.w3.org/2001/XMLSchema#decimal".
*/
SERD_API
SerdStatus
serd_env_set_prefix(SerdEnv* SERD_NONNULL env,
SerdStringView name,
SerdStringView uri);
/**
Qualify `uri` into a CURIE if possible.
Returns null if `uri` can not be qualified (usually because no corresponding
prefix is defined).
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_env_qualify(const SerdEnv* SERD_NULLABLE env,
const SerdNode* SERD_NONNULL uri);
/**
Expand `node`, transforming CURIEs and URI references into absolute URIs.
If `node` is a relative URI reference, it is expanded to a full URI if
possible. If `node` is a literal, its datatype is expanded if necessary.
If `node` is a CURIE, it is expanded to a full URI if possible.
For simple nodes that do not require expansion, a copy is returned. Null is
returned if `node` is/contains a CURIE or relative URI that can not be
expanded.
*/
SERD_API
SerdNode* SERD_ALLOCATED
serd_env_expand(const SerdEnv* SERD_NULLABLE env,
const SerdNode* SERD_NULLABLE node);
/// Write all prefixes in `env` to `sink`
SERD_API
void
serd_env_write_prefixes(const SerdEnv* SERD_NONNULL env,
const SerdSink* SERD_NONNULL sink);
/**
@}
@defgroup serd_sink Sink
@{
*/
/// Function to free an opaque handle
typedef void (*SerdFreeFunc)(void* SERD_NULLABLE ptr);
/**
Create a new sink.
Initially, the sink has no set functions and will do nothing. Use the
serd_sink_set_*_func functions to set handlers for various events.
@param handle Opaque handle that will be passed to sink functions.
@param event_func Function that will be called for every event
@param free_handle Free function to call on handle in serd_sink_free().
*/
SERD_API
SerdSink* SERD_ALLOCATED
serd_sink_new(void* SERD_NULLABLE handle,
SerdEventFunc SERD_NULLABLE event_func,
SerdFreeFunc SERD_NULLABLE free_handle);
/// Free `sink`
SERD_API
void
serd_sink_free(SerdSink* SERD_NULLABLE sink);
/// Send an event to the sink
SERD_API
SerdStatus
serd_sink_write_event(const SerdSink* SERD_NONNULL sink,
const SerdEvent* SERD_NONNULL event);
/// Set the base URI
SERD_API
SerdStatus
serd_sink_write_base(const SerdSink* SERD_NONNULL sink,
const SerdNode* SERD_NONNULL uri);
/// Set a namespace prefix
SERD_API
SerdStatus
serd_sink_write_prefix(const SerdSink* SERD_NONNULL sink,
const SerdNode* SERD_NONNULL name,
const SerdNode* SERD_NONNULL uri);
/// Write a statement
SERD_API
SerdStatus
serd_sink_write_statement(const SerdSink* SERD_NONNULL sink,
SerdStatementFlags flags,
const SerdStatement* SERD_NONNULL statement);
/// Write a statement from individual nodes
SERD_API
SerdStatus
serd_sink_write(const SerdSink* SERD_NONNULL sink,
SerdStatementFlags flags,
const SerdNode* SERD_NONNULL subject,
const SerdNode* SERD_NONNULL predicate,
const SerdNode* SERD_NONNULL object,
const SerdNode* SERD_NULLABLE graph);
/// Mark the end of an anonymous node
SERD_API
SerdStatus
serd_sink_write_end(const SerdSink* SERD_NONNULL sink,
const SerdNode* SERD_NONNULL node);
/**
@}
@defgroup serd_reader Reader
@{
*/
/// Create a new RDF reader
SERD_API
SerdReader* SERD_ALLOCATED
serd_reader_new(SerdWorld* SERD_NONNULL world,
SerdSyntax syntax,
SerdReaderFlags flags,
const SerdSink* SERD_NONNULL sink,
size_t stack_size);
/**
Set a prefix to be added to all blank node identifiers
This is useful when multiple files are to be parsed into the same output (a
model or a file). Since Serd preserves blank node IDs, this could cause
conflicts where two non-equivalent blank nodes are merged, resulting in
corrupt data. By setting a unique blank node prefix for each parsed file,
this can be avoided, while preserving blank node names.
*/
SERD_API
void
serd_reader_add_blank_prefix(SerdReader* SERD_NONNULL reader,
const char* SERD_NULLABLE prefix);
/// Prepare to read from a byte source
SERD_API
SerdStatus
serd_reader_start(SerdReader* SERD_NONNULL reader,
SerdByteSource* SERD_NONNULL byte_source);
/**
Read a single "chunk" of data during an incremental read.
This function will read a single top level description, and return. This
may be a directive, statement, or several statements; essentially it reads
until a '.' is encountered. This is particularly useful for reading
directly from a pipe or socket.
*/
SERD_API
SerdStatus
serd_reader_read_chunk(SerdReader* SERD_NONNULL reader);
/**
Read a complete document from the source.
This function will continue pulling from the source until a complete
document has been read. Note that this may block when used with streams,
for incremental reading use serd_reader_read_chunk().
*/
SERD_API
SerdStatus
serd_reader_read_document(SerdReader* SERD_NONNULL reader);
/**
Finish reading from the source.
This should be called before starting to read from another source.
*/
SERD_API
SerdStatus
serd_reader_finish(SerdReader* SERD_NONNULL reader);
/**
Free `reader`.
The reader will be finished via `serd_reader_finish()` if necessary.
*/
SERD_API
void
serd_reader_free(SerdReader* SERD_NULLABLE reader);
/**
@}
@defgroup serd_writer Writer
@{
*/
/// Create a new RDF writer
SERD_API
SerdWriter* SERD_ALLOCATED
serd_writer_new(SerdWorld* SERD_NONNULL world,
SerdSyntax syntax,
SerdWriterFlags flags,
SerdEnv* SERD_NONNULL env,
SerdByteSink* SERD_NONNULL byte_sink);
/// Free `writer`
SERD_API
void
serd_writer_free(SerdWriter* SERD_NULLABLE writer);
/// Return a sink interface that emits statements via `writer`
SERD_CONST_API
const SerdSink* SERD_NONNULL
serd_writer_sink(SerdWriter* SERD_NONNULL writer);
/// Return the env used by `writer`
SERD_PURE_API
SerdEnv* SERD_NONNULL
serd_writer_env(SerdWriter* SERD_NONNULL writer);
/**
A convenience sink function for writing to a string.
This function can be used as a SerdSink to write to a SerdBuffer which is
resized as necessary with realloc(). The `stream` parameter must point to
an initialized SerdBuffer. When the write is finished, the string should be
retrieved with serd_buffer_sink_finish().
*/
SERD_API
size_t
serd_buffer_sink(const void* SERD_NONNULL buf,
size_t size,
size_t nmemb,
void* SERD_NONNULL stream);
/**
Finish a serialisation to a buffer with serd_buffer_sink().
The returned string is the result of the serialisation, which is null
terminated (by this function) and owned by the caller.
*/
SERD_API
char* SERD_NULLABLE
serd_buffer_sink_finish(SerdBuffer* SERD_NONNULL stream);
/**
Set a prefix to be removed from matching blank node identifiers
This is the counterpart to serd_reader_add_blank_prefix() which can be used
to "undo" added prefixes.
*/
SERD_API
void
serd_writer_chop_blank_prefix(SerdWriter* SERD_NONNULL writer,
const char* SERD_NULLABLE prefix);
/**
Set the current output base URI, and emit a directive if applicable.
Note this function can be safely casted to SerdBaseSink.
*/
SERD_API
SerdStatus
serd_writer_set_base_uri(SerdWriter* SERD_NONNULL writer,
const SerdNode* SERD_NULLABLE uri);
/**
Set the current root URI.
The root URI should be a prefix of the base URI. The path of the root URI
is the highest path any relative up-reference can refer to. For example,
with root <file:///foo/root> and base <file:///foo/root/base>,
<file:///foo/root> will be written as <../>, but <file:///foo> will be
written non-relatively as <file:///foo>. If the root is not explicitly set,
it defaults to the base URI, so no up-references will be created at all.
*/
SERD_API
SerdStatus
serd_writer_set_root_uri(SerdWriter* SERD_NONNULL writer,
const SerdNode* SERD_NULLABLE uri);
/**
Finish a write
This flushes any pending output, for example terminating punctuation, so
that the output is a complete document.
*/
SERD_API
SerdStatus
serd_writer_finish(SerdWriter* SERD_NONNULL writer);
/**
@}
@defgroup serd_nodes Nodes
@{
*/
/// Create a new node set
SERD_API
SerdNodes* SERD_ALLOCATED
serd_nodes_new(void);
/**
Free `nodes` and all nodes that are stored in it.
Note that this invalidates any pointers previously returned from
`serd_nodes_intern()` or `serd_nodes_manage()` calls on `nodes`.
*/
SERD_API
void
serd_nodes_free(SerdNodes* SERD_NULLABLE nodes);
/**
Intern `node`.
Multiple calls with equivalent nodes will return the same pointer.
@return A node that is different than, but equivalent to, `node`.
*/
SERD_API
const SerdNode* SERD_ALLOCATED
serd_nodes_intern(SerdNodes* SERD_NONNULL nodes,
const SerdNode* SERD_NULLABLE node);
/**
Manage `node`.
Like `serd_nodes_intern`, but takes ownership of `node`, freeing it and
returning a previously interned/managed equivalent node if necessary.
@return A node that is equivalent to `node`.
*/
SERD_API
const SerdNode* SERD_ALLOCATED
serd_nodes_manage(SerdNodes* SERD_NONNULL nodes, SerdNode* SERD_NULLABLE node);
/**
Dereference `node`.
Decrements the reference count of `node`, and frees the internally stored
equivalent node if this was the last reference. Does nothing if no node
equivalent to `node` is stored in `nodes`.
*/
SERD_API
void
serd_nodes_deref(SerdNodes* SERD_NONNULL nodes,
const SerdNode* SERD_NONNULL node);
/**
@}
@defgroup serd_statement Statement
@{
*/
/// Return the given node in `statement`
SERD_PURE_API
const SerdNode* SERD_NULLABLE
serd_statement_node(const SerdStatement* SERD_NONNULL statement,
SerdField field);
/// Return the subject in `statement`
SERD_PURE_API
const SerdNode* SERD_NONNULL
serd_statement_subject(const SerdStatement* SERD_NONNULL statement);
/// Return the predicate in `statement`
SERD_PURE_API
const SerdNode* SERD_NONNULL
serd_statement_predicate(const SerdStatement* SERD_NONNULL statement);
/// Return the object in `statement`
SERD_PURE_API
const SerdNode* SERD_NONNULL
serd_statement_object(const SerdStatement* SERD_NONNULL statement);
/// Return the graph in `statement`
SERD_PURE_API
const SerdNode* SERD_NULLABLE
serd_statement_graph(const SerdStatement* SERD_NONNULL statement);
/// Return the source location where `statement` originated, or NULL
SERD_PURE_API
const SerdCursor* SERD_NULLABLE
serd_statement_cursor(const SerdStatement* SERD_NONNULL statement);
/**
@}
@defgroup serd_cursor Cursor
@{
*/
/**
Create a new cursor
Note that, to minimise model overhead, the cursor does not own the name
node, so `name` must have a longer lifetime than the cursor for it to be
valid. That is, serd_cursor_name() will return exactly the pointer
`name`, not a copy. For cursors from models, this is the lifetime of the
model. For user-created cursors, the simplest way to handle this is to use
`SerdNodes`.
@param name The name of the document or stream (usually a file URI)
@param line The line number in the document (1-based)
@param col The column number in the document (1-based)
@return A new cursor that must be freed with serd_cursor_free()
*/
SERD_API
SerdCursor* SERD_ALLOCATED
serd_cursor_new(const SerdNode* SERD_NONNULL name, unsigned line, unsigned col);
/// Return a copy of `cursor`
SERD_API
SerdCursor* SERD_ALLOCATED
serd_cursor_copy(const SerdCursor* SERD_NULLABLE cursor);
/// Free `cursor`
SERD_API
void
serd_cursor_free(SerdCursor* SERD_NULLABLE cursor);
/// Return true iff `lhs` is equal to `rhs`
SERD_PURE_API
bool
serd_cursor_equals(const SerdCursor* SERD_NULLABLE lhs,
const SerdCursor* SERD_NULLABLE rhs);
/**
Return the document name.
This is typically a file URI, but may be a descriptive string node for
statements that originate from streams.
*/
SERD_PURE_API
const SerdNode* SERD_NONNULL
serd_cursor_name(const SerdCursor* SERD_NONNULL cursor);
/// Return the one-relative line number in the document
SERD_PURE_API
unsigned
serd_cursor_line(const SerdCursor* SERD_NONNULL cursor);
/// Return the zero-relative column number in the line
SERD_PURE_API
unsigned
serd_cursor_column(const SerdCursor* SERD_NONNULL cursor);
/**
@}
@}
*/
#ifdef __cplusplus
# if defined(__GNUC__)
# pragma GCC diagnostic pop
# endif
} /* extern "C" */
#endif
#endif /* SERD_SERD_H */