#include <stdint.h>
#include <stddef.h>
+/* For bt_get() */
+#include <babeltrace/ref.h>
+
+/* For bt_bool */
+#include <babeltrace/types.h>
+
+/* For BT_FIELD_TYPE_ID_* */
+#include <babeltrace/ctf-ir/field-types.h>
+
#ifdef __cplusplus
extern "C" {
#endif
-struct bt_ctf_event_class;
-struct bt_ctf_event;
-struct bt_ctf_field;
-struct bt_ctf_field_type;
+struct bt_field_type;
+
+/**
+@defgroup ctfirfields CTF IR fields
+@ingroup ctfir
+@brief CTF IR fields.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>field</em></strong> is an object which holds a
+concrete value, and which is described by a @ft.
+
+In the CTF IR hierarchy, you can set the root fields of two objects:
+
+- \ref ctfirpacket
+ - Trace packet header field: bt_packet_set_header().
+ - Stream packet context field: bt_packet_set_context().
+- \ref ctfirevent
+ - Stream event header field: bt_event_set_header().
+ - Stream event context field: bt_event_set_stream_event_context().
+ - Event context field: bt_event_set_event_context().
+ - Event payload field: bt_event_set_payload_field().
+
+There are two categories of fields:
+
+- <strong>Basic fields</strong>:
+ - @intfield: contains an integral value.
+ - @floatfield: contains a floating point number value.
+ - @enumfield: contains an integer field which contains an integral
+ value.
+ - @stringfield: contains a string value.
+- <strong>Compound fields</strong>:
+ - @structfield: contains an ordered list of named fields
+ (possibly with different @fts).
+ - @arrayfield: contains an ordered list of fields which share
+ the same field type.
+ - @seqfield: contains an ordered list of fields which share
+ the same field type.
+ - @varfield: contains a single, current field.
+
+You can create a field object from a @ft object with
+bt_field_create(). The enumeration and compound fields create their
+contained fields with the following getters if such fields do not exist
+yet:
+
+- bt_field_enumeration_get_container()
+- bt_field_structure_get_field_by_name()
+- bt_field_array_get_field()
+- bt_field_sequence_get_field()
+- bt_field_variant_get_field()
+
+If you already have a field object, you can also assign it to a specific
+name within a @structfield with
+bt_field_structure_set_field_by_name().
+
+You can get a reference to the @ft which was used to create a field with
+bt_field_get_type(). You can get the
+\link #bt_field_type_id type ID\endlink of this field type directly with
+bt_field_get_type_id().
+
+You can get a deep copy of a field with bt_field_copy(). The field
+copy, and its contained field copies if it's the case, have the same
+field type as the originals.
+
+As with any Babeltrace object, CTF IR field objects have
+<a href="https://en.wikipedia.org/wiki/Reference_counting">reference
+counts</a>. See \ref refs to learn more about the reference counting
+management of Babeltrace objects.
+
+The functions which freeze CTF IR \link ctfirpacket packet\endlink and
+\link ctfirevent event\endlink objects also freeze their root field
+objects. You cannot modify a frozen field object: it is considered
+immutable, except for \link refs reference counting\endlink.
+
+@sa ctfirfieldtypes
+
+@file
+@brief CTF IR fields type and functions.
+@sa ctfirfields
+
+@addtogroup ctfirfields
+@{
+*/
+
+/**
+@struct bt_field
+@brief A CTF IR field.
+@sa ctfirfields
+*/
+struct bt_field;
+struct bt_event_class;
+struct bt_event;
+struct bt_field_type;
+struct bt_field_type_enumeration_mapping_iterator;
+
+/**
+@name Creation and parent field type access functions
+@{
+*/
+
+extern struct bt_field_type *bt_field_borrow_type(struct bt_field *field);
+
+/**
+@brief Returns the parent @ft of the @field \p field.
+
+This function returns a reference to the field type which was used to
+create the field object in the first place with bt_field_create().
+
+@param[in] field Field of which to get the parent field type.
+@returns Parent field type of \p event,
+ or \c NULL on error.
+
+@prenotnull{field}
+@postrefcountsame{field}
+@postsuccessrefcountretinc
+*/
+static inline
+struct bt_field_type *bt_field_get_type(struct bt_field *field)
+{
+ return bt_get(bt_field_borrow_type(field));
+}
-/*
- * bt_ctf_field_create: create an instance of a field.
- *
- * Allocate a new field of the type described by the bt_ctf_field_type
- * structure.The creation of a field sets its reference count to 1.
- *
- * @param type Field type to be instanciated.
- *
- * Returns an allocated field on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_create(
- struct bt_ctf_field_type *type);
+/** @} */
+
+/**
+@name Type information
+@{
+*/
+
+/**
+@brief Returns the type ID of the @ft of the @field \p field.
+
+@param[in] field Field of which to get the type ID of its
+ parent field type..
+@returns Type ID of the parent field type of \p field,
+ or #BT_FIELD_TYPE_ID_UNKNOWN on error.
+
+@prenotnull{field}
+@postrefcountsame{field}
+
+@sa #bt_field_type_id: CTF IR field type ID.
+@sa bt_field_is_integer(): Returns whether or not a given field is a
+ @intfield.
+@sa bt_field_is_floating_point(): Returns whether or not a given
+ field is a @floatfield.
+@sa bt_field_is_enumeration(): Returns whether or not a given field
+ is a @enumfield.
+@sa bt_field_is_string(): Returns whether or not a given field is a
+ @stringfield.
+@sa bt_field_is_structure(): Returns whether or not a given field is
+ a @structfield.
+@sa bt_field_is_array(): Returns whether or not a given field is a
+ @arrayfield.
+@sa bt_field_is_sequence(): Returns whether or not a given field is
+ a @seqfield.
+@sa bt_field_is_variant(): Returns whether or not a given field is a
+ @varfield.
+*/
+extern enum bt_field_type_id bt_field_get_type_id(struct bt_field *field);
+
+/**
+@brief Returns whether or not the @field \p field is a @intfield.
+
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is an integer field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
+
+@prenotnull{field}
+@postrefcountsame{field}
+
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_integer(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_INTEGER;
+}
-/*
- * bt_ctf_field_structure_get_field: get a structure's field.
- *
- * Get the structure's field corresponding to the provided field name.
- * bt_put() must be called on the returned value.
- *
- * @param structure Structure field instance.
- * @param name Name of the field in the provided structure.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_structure_get_field(
- struct bt_ctf_field *structure, const char *name);
+/**
+@brief Returns whether or not the @field \p field is a @floatfield.
-/*
- * bt_ctf_field_structure_get_field_by_index: get a structure's field by index.
- *
- * Get the structure's field corresponding to the provided field name.
- * bt_put() must be called on the returned value.
- * The indexes are the same as those provided for bt_ctf_field_type_structure.
- *
- * @param structure Structure field instance.
- * @param index Index of the field in the provided structure.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_structure_get_field_by_index(
- struct bt_ctf_field *structure, int index);
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is a floating point number fiel
+ #BT_FALSE or 0 otherwise (including if \p field is
+ \c NULL).
-/*
- * bt_ctf_field_array_get_field: get an array's field at position "index".
- *
- * Return the array's field at position "index". bt_put() must be
- * called on the returned value.
- *
- * @param array Array field instance.
- * @param index Position of the array's desired element.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_array_get_field(
- struct bt_ctf_field *array, uint64_t index);
+@prenotnull{field}
+@postrefcountsame{field}
-/*
- * bt_ctf_field_sequence_get_length: get a sequence's length.
- *
- * Get the sequence's length field.
- *
- * @param sequence Sequence field instance.
- *
- * Returns a field instance on success, NULL if a length was never set.
- */
-extern struct bt_ctf_field *bt_ctf_field_sequence_get_length(
- struct bt_ctf_field *sequence);
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_floating_point(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_FLOAT;
+}
-/*
- * bt_ctf_field_sequence_set_length: set a sequence's length.
- *
- * Set the sequence's length field.
- *
- * @param sequence Sequence field instance.
- * @param length_field Unsigned integer field instance indicating the
- * sequence's length.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_sequence_set_length(struct bt_ctf_field *sequence,
- struct bt_ctf_field *length_field);
+/**
+@brief Returns whether or not the @field \p field is a @enumfield.
-/*
- * bt_ctf_field_sequence_get_field: get a sequence's field at position "index".
- *
- * Return the sequence's field at position "index". The sequence's length must
- * have been set prior to calling this function using
- * bt_ctf_field_sequence_set_length().
- * bt_put() must be called on the returned value.
- *
- * @param array Sequence field instance.
- * @param index Position of the sequence's desired element.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_sequence_get_field(
- struct bt_ctf_field *sequence, uint64_t index);
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is an enumeration field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
-/*
- * bt_ctf_field_variant_get_field: get a variant's selected field.
- *
- * Return the variant's selected field. The "tag" field is the selector enum
- * field. bt_put() must be called on the returned value.
- *
- * @param variant Variant field instance.
- * @param tag Selector enumeration field.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_variant_get_field(
- struct bt_ctf_field *variant, struct bt_ctf_field *tag);
+@prenotnull{field}
+@postrefcountsame{field}
-/*
- * bt_ctf_field_variant_get_current_field: get the current selected field of a
- * variant.
- *
- * Return the variant's current selected field. This function, unlike
- * bt_ctf_field_variant_get_field(), does not create any field; it
- * returns NULL if there's no current selected field yet.
- *
- * @param variant Variant field instance.
- *
- * Returns a field instance on success, NULL on error or when there's no
- * current selected field.
- */
-extern struct bt_ctf_field *bt_ctf_field_variant_get_current_field(
- struct bt_ctf_field *variant);
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_enumeration(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_ENUM;
+}
-/*
- * bt_ctf_field_variant_get_tag: get the tag field of a variant.
- *
- * Return the variant's associated tag field. This function, unlike
- * bt_ctf_field_variant_get_field(), does not create any field; it
- * returns NULL if there's no current selected field yet (and, thus, no
- * associated tag).
- *
- * @param variant Variant field instance.
- *
- * Returns a field instance (enumeration) on success, NULL on error or when
- * there is no currently selected field.
- */
-extern struct bt_ctf_field *bt_ctf_field_variant_get_tag(
- struct bt_ctf_field *variant);
+/**
+@brief Returns whether or not the @field \p field is a @stringfield.
-/*
- * bt_ctf_field_enumeration_get_container: get an enumeration field's container.
- *
- * Return the enumeration's underlying container field (an integer).
- * bt_put() must be called on the returned value.
- *
- * @param enumeration Enumeration field instance.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_enumeration_get_container(
- struct bt_ctf_field *enumeration);
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is a string field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
-/*
- * bt_ctf_field_enumeration_get_mapping_name: get an enumeration field's mapping
- * name.
- *
- * Return the enumeration's underlying container field (an integer).
- * bt_put() must be called on the returned value.
- *
- * @param enumeration Enumeration field instance.
- *
- * Returns a field instance on success, NULL on error.
- */
-extern const char *bt_ctf_field_enumeration_get_mapping_name(
- struct bt_ctf_field *enumeration);
+@prenotnull{field}
+@postrefcountsame{field}
-/*
- * bt_ctf_field_signed_integer_get_value: get a signed integer field's value
- *
- * Get a signed integer field's value.
- *
- * @param integer Signed integer field instance.
- * @param value Pointer to a signed integer where the value will be stored.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_signed_integer_get_value(struct bt_ctf_field *integer,
- int64_t *value);
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_string(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_STRING;
+}
-/*
- * bt_ctf_field_signed_integer_set_value: set a signed integer field's value
- *
- * Set a signed integer field's value. The value is checked to make sure it
- * can be stored in the underlying field.
- *
- * @param integer Signed integer field instance.
- * @param value Signed integer field value.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_signed_integer_set_value(struct bt_ctf_field *integer,
- int64_t value);
+/**
+@brief Returns whether or not the @field \p field is a @structfield.
-/*
- * bt_ctf_field_unsigned_integer_get_value: get unsigned integer field's value
- *
- * Get an unsigned integer field's value.
- *
- * @param integer Unsigned integer field instance.
- * @param value Pointer to an unsigned integer where the value will be stored.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_unsigned_integer_get_value(struct bt_ctf_field *integer,
- uint64_t *value);
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is a structure field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
-/*
- * bt_ctf_field_unsigned_integer_set_value: set unsigned integer field's value
- *
- * Set an unsigned integer field's value. The value is checked to make sure it
- * can be stored in the underlying field.
- *
- * @param integer Unsigned integer field instance.
- * @param value Unsigned integer field value.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_unsigned_integer_set_value(struct bt_ctf_field *integer,
- uint64_t value);
+@prenotnull{field}
+@postrefcountsame{field}
-/*
- * bt_ctf_field_floating_point_get_value: get a floating point field's value
- *
- * Get a floating point field's value.
- *
- * @param floating_point Floating point field instance.
- * @param value Pointer to a double where the value will be stored.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_floating_point_get_value(
- struct bt_ctf_field *floating_point, double *value);
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_structure(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_STRUCT;
+}
-/*
- * bt_ctf_field_floating_point_set_value: set a floating point field's value
- *
- * Set a floating point field's value. The underlying type may not support the
- * double's full precision.
- *
- * @param floating_point Floating point field instance.
- * @param value Floating point field value.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_floating_point_set_value(
- struct bt_ctf_field *floating_point,
- double value);
+/**
+@brief Returns whether or not the @field \p field is a @arrayfield.
-/*
- * bt_ctf_field_string_get_value: get a string field's value
- *
- * Get a string field's value.
- *
- * @param string_field String field instance.
- *
- * Returns the string's value, NULL if unset.
- */
-extern const char *bt_ctf_field_string_get_value(
- struct bt_ctf_field *string_field);
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is an array field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
-/*
- * bt_ctf_field_string_set_value: set a string field's value
- *
- * Set a string field's value.
- *
- * @param string_field String field instance.
- * @param value String field value (will be copied).
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_string_set_value(struct bt_ctf_field *string_field,
+@prenotnull{field}
+@postrefcountsame{field}
+
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_array(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_ARRAY;
+}
+
+/**
+@brief Returns whether or not the @field \p field is a @seqfield.
+
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is a sequence field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
+
+@prenotnull{field}
+@postrefcountsame{field}
+
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_sequence(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_SEQUENCE;
+}
+
+/**
+@brief Returns whether or not the @field \p field is a @varfield.
+
+@param[in] field Field to check (can be \c NULL).
+@returns #BT_TRUE if \p field is a variant field, or
+ #BT_FALSE otherwise (including if \p field is
+ \c NULL).
+
+@prenotnull{field}
+@postrefcountsame{field}
+
+@sa bt_field_get_type_id(): Returns the type ID of a given
+ field's type.
+*/
+static inline
+bt_bool bt_field_is_variant(struct bt_field *field)
+{
+ return bt_field_get_type_id(field) == BT_FIELD_TYPE_ID_VARIANT;
+}
+
+/** @} */
+
+/**
+@name Misc. functions
+@{
+*/
+
+/** @} */
+
+/** @} */
+
+/**
+@defgroup ctfirintfield CTF IR integer field
+@ingroup ctfirfields
+@brief CTF IR integer field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>integer field</em></strong> is a @field which
+holds a signed or unsigned integral value, and which is described by
+a @intft.
+
+An integer field object is considered \em unsigned if
+bt_field_type_integer_get_signed() on its parent field type returns
+0. Otherwise it is considered \em signed. You \em must use
+bt_field_integer_unsigned_get_value() and
+bt_field_integer_unsigned_set_value() with an unsigned integer
+field, and bt_field_integer_signed_get_value() and
+bt_field_integer_signed_set_value() with a signed integer field.
+
+After you create an integer field with bt_field_create(), you
+\em must set an integral value with
+bt_field_integer_unsigned_set_value() or
+bt_field_integer_signed_set_value() before you can get the
+field's value with bt_field_integer_unsigned_get_value() or
+bt_field_integer_signed_get_value().
+
+@sa ctfirintfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirintfield
+@{
+*/
+
+/**
+@brief Returns the signed integral value of the @intfield
+ \p integer_field.
+
+@param[in] integer_field Integer field of which to get the
+ signed integral value.
+@param[out] value Returned signed integral value of
+ \p integer_field.
+@returns 0 on success, or a negative value on
+ error, including if \p integer_field
+ has no integral value yet.
+
+@prenotnull{integer_field}
+@prenotnull{value}
+@preisintfield{integer_field}
+@pre bt_field_type_integer_get_signed() returns 1 for the parent
+ @ft of \p integer_field.
+@pre \p integer_field contains a signed integral value previously
+ set with bt_field_integer_signed_set_value().
+@postrefcountsame{integer_field}
+
+@sa bt_field_integer_signed_set_value(): Sets the signed integral
+ value of a given integer field.
+*/
+extern int bt_field_integer_signed_get_value(
+ struct bt_field *integer_field, int64_t *value);
+
+/**
+@brief Sets the signed integral value of the @intfield
+ \p integer_field to \p value.
+
+@param[in] integer_field Integer field of which to set
+ the signed integral value.
+@param[in] value New signed integral value of
+ \p integer_field.
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{integer_field}
+@preisintfield{integer_field}
+@prehot{integer_field}
+@pre bt_field_type_integer_get_signed() returns 1 for the parent
+ @ft of \p integer_field.
+@postrefcountsame{integer_field}
+
+@sa bt_field_integer_signed_get_value(): Returns the signed integral
+ value of a given integer field.
+*/
+extern int bt_field_integer_signed_set_value(
+ struct bt_field *integer_field, int64_t value);
+
+/**
+@brief Returns the unsigned integral value of the @intfield
+ \p integer_field.
+
+@param[in] integer_field Integer field of which to get the
+ unsigned integral value.
+@param[out] value Returned unsigned integral value of
+ \p integer_field.
+@returns 0 on success, or a negative value on
+ error, including if \p integer_field
+ has no integral value yet.
+
+@prenotnull{integer_field}
+@prenotnull{value}
+@preisintfield{integer_field}
+@pre bt_field_type_integer_get_signed() returns 0 for the parent
+ @ft of \p integer_field.
+@pre \p integer_field contains an unsigned integral value previously
+ set with bt_field_integer_unsigned_set_value().
+@postrefcountsame{integer_field}
+
+@sa bt_field_integer_unsigned_set_value(): Sets the unsigned
+ integral value of a given integer field.
+*/
+extern int bt_field_integer_unsigned_get_value(
+ struct bt_field *integer_field, uint64_t *value);
+
+/**
+@brief Sets the unsigned integral value of the @intfield
+ \p integer_field to \p value.
+
+@param[in] integer_field Integer field of which to set
+ the unsigned integral value.
+@param[in] value New unsigned integral value of
+ \p integer_field.
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{integer_field}
+@preisintfield{integer_field}
+@prehot{integer_field}
+@pre bt_field_type_integer_get_signed() returns 0 for the parent
+ @ft of \p integer_field.
+@postrefcountsame{integer_field}
+
+@sa bt_field_integer_unsigned_get_value(): Returns the unsigned
+ integral value of a given integer field.
+*/
+extern int bt_field_integer_unsigned_set_value(
+ struct bt_field *integer_field, uint64_t value);
+
+/** @} */
+
+/**
+@defgroup ctfirfloatfield CTF IR floating point number field
+@ingroup ctfirfields
+@brief CTF IR floating point number field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>floating point number field</em></strong> is a
+@field which holds a floating point number value, and which is
+described by a @floatft.
+
+After you create a floating point number field with bt_field_create(), you
+\em must set a floating point number value with
+bt_field_floating_point_set_value() before you can get the
+field's value with bt_field_floating_point_get_value().
+
+@sa ctfirfloatfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirfloatfield
+@{
+*/
+
+/**
+@brief Returns the floating point number value of the @floatfield
+ \p float_field.
+
+@param[in] float_field Floating point number field of which to get the
+ floating point number value.
+@param[out] value Returned floating point number value of
+ \p float_field.
+@returns 0 on success, or a negative value on error,
+ including if \p float_field has no floating
+ point number value yet.
+
+@prenotnull{float_field}
+@prenotnull{value}
+@preisfloatfield{float_field}
+@pre \p float_field contains a floating point number value previously
+ set with bt_field_floating_point_set_value().
+@postrefcountsame{float_field}
+
+@sa bt_field_floating_point_set_value(): Sets the floating point
+ number value of a given floating point number field.
+*/
+extern int bt_field_floating_point_get_value(
+ struct bt_field *float_field, double *value);
+
+/**
+@brief Sets the floating point number value of the @floatfield
+ \p float_field to \p value.
+
+@param[in] float_field Floating point number field of which to set
+ the floating point number value.
+@param[in] value New floating point number value of
+ \p float_field.
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{float_field}
+@preisfloatfield{float_field}
+@prehot{float_field}
+@postrefcountsame{float_field}
+
+@sa bt_field_floating_point_get_value(): Returns the floating point
+ number value of a given floating point number field.
+*/
+extern int bt_field_floating_point_set_value(
+ struct bt_field *float_field, double value);
+
+/** @} */
+
+/**
+@brief Returns a @enumftiter on all the mappings of the field type of
+ \p enum_field which contain the current integral value of the
+ @enumfield \p enum_field in their range.
+
+This function is the equivalent of using
+bt_field_type_enumeration_find_mappings_by_unsigned_value() or
+bt_field_type_enumeration_find_mappings_by_signed_value() with the
+current integral value of \p enum_field.
+
+@param[in] enum_field Enumeration field of which to get the mappings
+ containing the current integral value of \p
+ enum_field in their range.
+@returns @enumftiter on the set of mappings of the field
+ type of \p enum_field which contain the current
+ integral value of \p enum_field in their range,
+ or \c NULL if no mappings were found or on
+ error.
+
+@prenotnull{enum_field}
+@preisenumfield{enum_field}
+@pre The wrapped integer field of \p enum_field contains an integral
+ value.
+@postrefcountsame{enum_field}
+@postsuccessrefcountret1
+@post <strong>On success</strong>, the returned @enumftiter can iterate
+ on at least one mapping.
+*/
+extern struct bt_field_type_enumeration_mapping_iterator *
+bt_field_enumeration_get_mappings(struct bt_field *enum_field);
+
+/** @} */
+
+/**
+@defgroup ctfirstringfield CTF IR string field
+@ingroup ctfirfields
+@brief CTF IR string field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>string field</em></strong> is a @field which holds
+a string value, and which is described by a @stringft.
+
+Use bt_field_string_set_value() to set the current string value
+of a string field object. You can also use bt_field_string_append()
+and bt_field_string_append_len() to append a string to the current
+value of a string field.
+
+After you create a string field with bt_field_create(), you
+\em must set a string value with
+bt_field_string_set_value(), bt_field_string_append(), or
+bt_field_string_append_len() before you can get the
+field's value with bt_field_string_get_value().
+
+@sa ctfirstringfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirstringfield
+@{
+*/
+
+/**
+@brief Returns the string value of the @stringfield \p string_field.
+
+On success, \p string_field remains the sole owner of the returned
+value.
+
+@param[in] string_field String field field of which to get the
+ string value.
+@returns String value, or \c NULL on error.
+
+@prenotnull{string_field}
+@prenotnull{value}
+@preisstringfield{string_field}
+@pre \p string_field contains a string value previously
+ set with bt_field_string_set_value(),
+ bt_field_string_append(), or
+ bt_field_string_append_len().
+@postrefcountsame{string_field}
+
+@sa bt_field_string_set_value(): Sets the string value of a given
+ string field.
+*/
+extern const char *bt_field_string_get_value(struct bt_field *string_field);
+
+/**
+@brief Sets the string value of the @stringfield \p string_field to
+ \p value.
+
+@param[in] string_field String field of which to set
+ the string value.
+@param[in] value New string value of \p string_field (copied
+ on success).
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{string_field}
+@prenotnull{value}
+@preisstringfield{string_field}
+@prehot{string_field}
+@postrefcountsame{string_field}
+
+@sa bt_field_string_get_value(): Returns the string value of a
+ given string field.
+*/
+extern int bt_field_string_set_value(struct bt_field *string_field,
const char *value);
-/*
- * bt_ctf_field_string_append: append a string to a string field's
- * current value.
- *
- * Append a string to the current value of a string field. If the string
- * field was never set using bt_ctf_field_string_set_value(), it is
- * first set to an empty string, and then the concatenation happens.
- *
- * @param string_field String field instance.
- * @param value String to append to the current string field's value.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_string_append(struct bt_ctf_field *string_field,
+/**
+@brief Appends the string \p value to the current string value of
+ the @stringfield \p string_field.
+
+This function is the equivalent of:
+
+@code
+bt_field_string_append_len(string_field, value, strlen(value));
+@endcode
+
+@param[in] string_field String field of which to append \p value to
+ its current value.
+@param[in] value String to append to the current string value
+ of \p string_field (copied on success).
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{string_field}
+@prenotnull{value}
+@preisstringfield{string_field}
+@prehot{string_field}
+@postrefcountsame{string_field}
+
+@sa bt_field_string_set_value(): Sets the string value of a given
+ string field.
+*/
+extern int bt_field_string_append(struct bt_field *string_field,
const char *value);
-/*
- * bt_ctf_field_string_append_len: append a string of a given length to
- * a string field's current value.
- *
- * Append a string of a given length to the current value of a string
- * field. If the string field was never set using
- * bt_ctf_field_string_set_value(), it is first set to an empty string,
- * and then the concatenation happens.
- *
- * If a null byte is encountered before the given length, only the
- * substring before the first null byte is appended.
- *
- * @param string_field String field instance.
- * @param value String to append to the current string field's value.
- * @param length Length of string value to append.
- *
- * Returns 0 on success, a negative value on error.
- */
-extern int bt_ctf_field_string_append_len(
- struct bt_ctf_field *string_field, const char *value,
+/**
+@brief Appends the first \p length characters of \p value to the
+ current string value of the @stringfield \p string_field.
+
+If \p string_field has no current string value, this function first
+sets an empty string as the string value of \p string_field and then
+appends the first \p length characters of \p value.
+
+@param[in] string_field String field of which to append the first
+ \p length characters of \p value to
+ its current value.
+@param[in] value String containing the characters to append to
+ the current string value of \p string_field
+ (copied on success).
+@param[in] length Number of characters of \p value to append to
+ the current string value of \p string_field.
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{string_field}
+@prenotnull{value}
+@preisstringfield{string_field}
+@prehot{string_field}
+@postrefcountsame{string_field}
+
+@sa bt_field_string_set_value(): Sets the string value of a given
+ string field.
+*/
+extern int bt_field_string_append_len(
+ struct bt_field *string_field, const char *value,
unsigned int length);
-/*
- * bt_ctf_field_get_type: get a field's type
- *
- * @param field Field intance.
- *
- * Returns a field type instance on success, NULL on error.
- */
-extern struct bt_ctf_field_type *bt_ctf_field_get_type(
- struct bt_ctf_field *field);
+extern int bt_field_string_clear(struct bt_field *string_field);
-/*
- * bt_ctf_field_get_type_id: get a field's ctf_type_id.
- *
- * This is a helper function which avoids a call to
- * bt_ctf_field_get_type(), followed by a call to
- * bt_ctf_field_type_get_type_id(), followed by a call to
- * bt_ctf_put().
- *
- * @param field Field instance.
- *
- * Returns the field's ctf_type_id, CTF_TYPE_UNKNOWN on error.
- */
-extern enum bt_ctf_type_id bt_ctf_field_get_type_id(struct bt_ctf_field *field);
+/** @} */
-/*
- * bt_ctf_field_is_integer: returns whether or not a given field
- * is an integer type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is an integer type, 0 otherwise.
- */
-extern int bt_ctf_field_is_integer(struct bt_ctf_field *field);
+/**
+@defgroup ctfirstructfield CTF IR structure field
+@ingroup ctfirfields
+@brief CTF IR structure field.
-/*
- * bt_ctf_field_is_floating_point: returns whether or not a given field
- * is a floating point number type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is a floating point number type, 0 otherwise.
- */
-extern int bt_ctf_field_is_floating_point(struct bt_ctf_field *field);
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
-/*
- * bt_ctf_field_is_enumeration: returns whether or not a given field
- * is an enumeration type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is an enumeration type, 0 otherwise.
- */
-extern int bt_ctf_field_is_enumeration(struct bt_ctf_field *field);
+A CTF IR <strong><em>structure field</em></strong> is a @field which
+contains an ordered list of zero or more named @fields which can be
+different @fts, and which is described by a @structft.
-/*
- * bt_ctf_field_is_string: returns whether or not a given field
- * is a string type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is a string type, 0 otherwise.
- */
-extern int bt_ctf_field_is_string(struct bt_ctf_field *field);
+To set the value of a specific field of a structure field, you need to
+first get the field with bt_field_structure_get_field_by_name() or
+bt_field_structure_get_field_by_index(). If you already have a
+field object, you can assign it to a specific name within a structure
+field with bt_field_structure_set_field_by_name().
-/*
- * bt_ctf_field_is_structure: returns whether or not a given field
- * is a structure type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is a structure type, 0 otherwise.
- */
-extern int bt_ctf_field_is_structure(struct bt_ctf_field *field);
+@sa ctfirstructfieldtype
+@sa ctfirfields
-/*
- * bt_ctf_field_is_array: returns whether or not a given field
- * is an array type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is an array type, 0 otherwise.
- */
-extern int bt_ctf_field_is_array(struct bt_ctf_field *field);
+@addtogroup ctfirstructfield
+@{
+*/
-/*
- * bt_ctf_field_is_sequence: returns whether or not a given field
- * is a sequence type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is a sequence type, 0 otherwise.
- */
-extern int bt_ctf_field_is_sequence(struct bt_ctf_field *field);
+extern struct bt_field *bt_field_structure_borrow_field_by_name(
+ struct bt_field *struct_field, const char *name);
-/*
- * bt_ctf_field_is_variant: returns whether or not a given field
- * is a variant type.
- *
- * @param field Field instance.
- *
- * Returns 1 if the field instance is a variant type, 0 otherwise.
- */
-extern int bt_ctf_field_is_variant(struct bt_ctf_field *field);
+extern struct bt_field *bt_field_structure_borrow_field_by_index(
+ struct bt_field *struct_field, uint64_t index);
-/*
- * bt_ctf_field_copy: get a field's deep copy.
- *
- * Get a field's deep copy. The created field copy shares the source's
- * associated field types.
- *
- * On success, the returned copy has its reference count set to 1.
- *
- * @param field Field instance.
- *
- * Returns the field copy on success, NULL on error.
- */
-extern struct bt_ctf_field *bt_ctf_field_copy(struct bt_ctf_field *field);
+/** @} */
+
+/**
+@defgroup ctfirarrayfield CTF IR array field
+@ingroup ctfirfields
+@brief CTF IR array field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>array field</em></strong> is a @field which
+contains an ordered list of zero or more @fields sharing the same @ft,
+and which is described by a @arrayft.
+
+To set the value of a specific field of an array field, you need to
+first get the field with bt_field_array_get_field().
+
+@sa ctfirarrayfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirarrayfield
+@{
+*/
+
+extern struct bt_field *bt_field_array_borrow_field(
+ struct bt_field *array_field, uint64_t index);
+
+/** @} */
+
+/**
+@defgroup ctfirseqfield CTF IR sequence field
+@ingroup ctfirfields
+@brief CTF IR sequence field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>sequence field</em></strong> is a @field which
+contains an ordered list of zero or more @fields sharing the same @ft,
+and which is described by a @seqft.
+
+Before you can get a specific field of a sequence field with
+bt_field_sequence_get_field(), you need to set its current length
+@intfield with bt_field_sequence_set_length(). The integral value of
+the length field of a sequence field indicates the number of fields
+it contains.
+
+@sa ctfirseqfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirseqfield
+@{
+*/
+
+extern struct bt_field *bt_field_sequence_borrow_field(
+ struct bt_field *sequence_field, uint64_t index);
+
+extern int64_t bt_field_sequence_get_length(struct bt_field *sequence_field);
+
+/**
+@brief Sets the length @intfield of the @seqfield \p sequence_field
+ to \p length_field.
+
+The current integral value of \p length_field indicates the number of
+fields contained in \p sequence_field.
+
+@param[in] sequence_field Sequence field of which to set the
+ length field.
+@param[in] length_field Length field of \p sequence_field.
+@returns 0 on success, or a negative value on error.
+
+@prenotnull{sequence_field}
+@prenotnull{length_field}
+@preisseqfield{sequence_field}
+@preisintfield{length_field}
+@prehot{sequence_field}
+@postrefcountsame{sequence_field}
+@postsuccessrefcountinc{length_field}
+
+@sa bt_field_sequence_get_length(): Returns the length field of a
+ given sequence field.
+*/
+extern int bt_field_sequence_set_length(struct bt_field *sequence_field,
+ uint64_t length);
+
+/** @} */
+
+/**
+@defgroup ctfirvarfield CTF IR variant field
+@ingroup ctfirfields
+@brief CTF IR variant field.
+
+@code
+#include <babeltrace/ctf-ir/fields.h>
+@endcode
+
+A CTF IR <strong><em>variant field</em></strong> is a @field which
+contains a current @field amongst one or more choices, and which is
+described by a @varft.
+
+Use bt_field_variant_get_field() to get the @field selected by
+a specific tag @enumfield. Once you call this function, you can call
+bt_field_variant_get_current_field() afterwards to get this last
+field again.
+
+@sa ctfirvarfieldtype
+@sa ctfirfields
+
+@addtogroup ctfirvarfield
+@{
+*/
+
+extern int bt_field_variant_set_tag_signed(struct bt_field *variant_field,
+ int64_t tag);
+
+extern int bt_field_variant_set_tag_unsigned(struct bt_field *variant_field,
+ uint64_t tag);
+
+extern int bt_field_variant_get_tag_signed(struct bt_field *variant_field,
+ int64_t *tag);
+
+extern int bt_field_variant_get_tag_unsigned(struct bt_field *variant_field,
+ uint64_t *tag);
+
+extern struct bt_field *bt_field_variant_borrow_current_field(
+ struct bt_field *variant_field);
+
+/** @} */
#ifdef __cplusplus
}
projects / babeltrace.git / blobdiff