Tizen Native API  3.0
Iterator

Functions

Eldbus_Message_Itereldbus_message_iter_container_new (Eldbus_Message_Iter *iter, int type, const char *contained_signature)
 Create and append a typed iterator to another iterator.
Eina_Bool eldbus_message_iter_basic_append (Eldbus_Message_Iter *iter, int type,...)
 Append a basic type into an Eldbus_Iterator.
Eina_Bool eldbus_message_iter_arguments_append (Eldbus_Message_Iter *iter, const char *signature,...)
 Append an argument into an Eldbus_Message_Iter. For each complete type you need to provide the correspondent value. In case of complex types you need to provide an Eldbus_Message_Iter** to be allocated and then filled in.
Eina_Bool eldbus_message_iter_arguments_vappend (Eldbus_Message_Iter *iter, const char *signature, va_list ap)
 Set data to Eldbus_Message_Iter. For each complete in signature you need pass the value, in case of complex type a pointer to be allocated a Eldbus_Message_Iter that you need fill and close.
Eina_Bool eldbus_message_iter_fixed_array_append (Eldbus_Message_Iter *iter, int type, const void *array, unsigned int size)
Eina_Bool eldbus_message_iter_container_close (Eldbus_Message_Iter *iter, Eldbus_Message_Iter *sub)
 Closes a container-typed value appended to the message.
Eldbus_Message_Itereldbus_message_iter_get (const Eldbus_Message *msg)
 Get the main Eldbus_Message_Iter from the Eldbus_Message.
void eldbus_message_iter_basic_get (Eldbus_Message_Iter *iter, void *value)
 Get a basic type from Eldbus_Iterator.
char * eldbus_message_iter_signature_get (Eldbus_Message_Iter *iter)
 Returns the current signature of a message iterator.
Eina_Bool eldbus_message_iter_next (Eldbus_Message_Iter *iter)
 Moves the iterator to the next field, if any.
Eina_Bool eldbus_message_iter_get_and_next (Eldbus_Message_Iter *iter, char signature,...)
 Get a complete type from Eldbus_Message_Iter if is not at the end of iterator and move to next field. Useful to iterate over arrays.
Eina_Bool eldbus_message_iter_fixed_array_get (Eldbus_Message_Iter *iter, int signature, void *value, int *n_elements)
 Reads a block of fixed-length values from the message iterator.
Eina_Bool eldbus_message_iter_arguments_get (Eldbus_Message_Iter *iter, const char *signature,...)
 Get data from Eldbus_Message_Iter, for each complete type must have a pointer to store his value, in case of complex type a Eldbus_Message_Iter will be need.
Eina_Bool eldbus_message_iter_arguments_vget (Eldbus_Message_Iter *iter, const char *signature, va_list ap)
 Get data from Eldbus_Message_Iter, for each complete type must have a pointer to store his value, in case of complex type a Eldbus_Message_Iter will be need.
void eldbus_message_iter_del (Eldbus_Message_Iter *iter)
 Manually delete the iterator.

Function Documentation

Eina_Bool eldbus_message_iter_arguments_append ( Eldbus_Message_Iter iter,
const char *  signature,
  ... 
)

Append an argument into an Eldbus_Message_Iter. For each complete type you need to provide the correspondent value. In case of complex types you need to provide an Eldbus_Message_Iter** to be allocated and then filled in.

It's not possible to open two iterators at same iterator with this function. For example, to create a message with signature="aiai" you need to create the first container with eldbus_message_iter_container_new(), fill the array, close it with eldbus_message_iter_container_close() and then do the same for the second array.

Parameters:
iteriterator in which data will be appended
signaturesignature of the contained data
...values for each complete type
Returns:
EINA_TRUE on success, else EINA_FALSE
See also:
eldbus_message_iter_container_new()
eldbus_message_iter_container_close()
Note:
This function doesn't support variant, use eldbus_message_iter_container_new() instead to create the variant, fill with data and close it.
Since :
3.0
Examples:
complex-types-server.c, complex-types.c, and simple-signal-emit.c.
Eina_Bool eldbus_message_iter_arguments_get ( Eldbus_Message_Iter iter,
const char *  signature,
  ... 
)

Get data from Eldbus_Message_Iter, for each complete type must have a pointer to store his value, in case of complex type a Eldbus_Message_Iter will be need.

Parameters:
iteriterator
signatureof the complete data types on interator
...pointers of where data will be stored
Returns:
EINA_FALSE if signature different from signature in iterator
Since :
3.0
Examples:
banshee.c, complex-types-server.c, complex-types.c, and connman-list-services.c.
Eina_Bool eldbus_message_iter_arguments_vappend ( Eldbus_Message_Iter iter,
const char *  signature,
va_list  ap 
)

Set data to Eldbus_Message_Iter. For each complete in signature you need pass the value, in case of complex type a pointer to be allocated a Eldbus_Message_Iter that you need fill and close.

It's not possible open two iterators at same Iterator. Example: "aiai", to set this you need create and put the first array with eldbus_message_iter_container_new() fill array with data and close then you could open the second array with eldbus_message_iter_container_new().

Parameters:
iteriterator
signatureof data
apva_list with the values
Returns:
EINA_TRUE on success, else EINA_FALSE
Note:
This function don't support variant, use instead eldbus_message_iter_container_new() to create the variant fill data and close it.
Since :
3.0
Eina_Bool eldbus_message_iter_arguments_vget ( Eldbus_Message_Iter iter,
const char *  signature,
va_list  ap 
)

Get data from Eldbus_Message_Iter, for each complete type must have a pointer to store his value, in case of complex type a Eldbus_Message_Iter will be need.

Parameters:
iteriterator
signatureof the complete data types on interator
apva_list of the pointers of where data will be stored
Returns:
EINA_FALSE if signature different from signature in iterator
Since :
3.0

Append a basic type into an Eldbus_Iterator.

Since :
3.0
Examples:
complex-types-server.c, and complex-types.c.
void eldbus_message_iter_basic_get ( Eldbus_Message_Iter iter,
void *  value 
)

Get a basic type from Eldbus_Iterator.

Since :
3.0

Closes a container-typed value appended to the message.

Parameters:
iterparent of the sub-iterator
subthe iterator that will be closed
Returns:
EINA_FALSE if iterator was already close or if not enough memory
Since :
3.0
Examples:
complex-types-server.c, complex-types.c, and simple-signal-emit.c.
Eldbus_Message_Iter* eldbus_message_iter_container_new ( Eldbus_Message_Iter iter,
int  type,
const char *  contained_signature 
)

Create and append a typed iterator to another iterator.

After append data to returned iterator it must be closed calling eldbus_message_iter_container_close().

Container types are for example struct, variant, and array. For variants, the contained_signature should be the type of the single value inside the variant. For structs and dict entries, contained_signature should be NULL; it will be set to whatever types you write into the struct. For arrays, contained_signature should be the type of the array elements.

Parameters:
iterparent of the new iterator
typeof iterator (e.g struct, dict, variant or array)
contained_signaturesignature of what iterator will store
Returns:
the new iterator
Since :
3.0
Examples:
complex-types-server.c, complex-types.c, and simple-signal-emit.c.

Manually delete the iterator.

Iterators are usually bound to the life of Message they were created from, being deleted automatically once the message is deleted.

However when dealing with huge arrays or dicts it may become a major memory impact to leave the unused iterators alive. By calling this function one states the iterator is not used anymore and can be deleted.

Parameters:
iterthe iterator to be deleted.
Since :
3.0
Eina_Bool eldbus_message_iter_fixed_array_append ( Eldbus_Message_Iter iter,
int  type,
const void *  array,
unsigned int  size 
)

Append a array of basic type with fixed size to Eldbus_Message_Iter.

Parameters:
iteriterator
typebasic type that will be appended
arraydata to append
sizeof array
Returns:
EINA_TRUE on success, else EINA_FALSE
Since :
3.0
Examples:
complex-types-server.c.
Eina_Bool eldbus_message_iter_fixed_array_get ( Eldbus_Message_Iter iter,
int  signature,
void *  value,
int *  n_elements 
)

Reads a block of fixed-length values from the message iterator.

Fixed-length values are those basic types that are not string-like, such as integers, bool, double. The returned block will be from the current position in the array until the end of the array.

There is one exception here: although ELDBUS_TYPE_UNIX_FD is considered a 'fixed' type arrays of this type may not be read with this function.

The value argument should be the address of a location to store the returned array. So for int32 it should be a "const dbus_int32_t**" The returned value is by reference and should not be freed.

Because the array is not copied, this function runs in constant time and is fast; it's much preferred over walking the entire array with an iterator.

Parameters:
iterThe message iterator
signature
value
n_elements
Returns:
EINA_TRUE on success, else EINA_FALSE.
Since :
3.0

Get the main Eldbus_Message_Iter from the Eldbus_Message.

Since :
3.0
Examples:
complex-types-server.c, complex-types.c, and simple-signal-emit.c.
Eina_Bool eldbus_message_iter_get_and_next ( Eldbus_Message_Iter iter,
char  signature,
  ... 
)

Get a complete type from Eldbus_Message_Iter if is not at the end of iterator and move to next field. Useful to iterate over arrays.

Parameters:
iteriterator
signatureof the next completed type in Iterator
...pointer of where data will be stored
Returns:
if iterator was reach to end or if type different of the type that iterator points return EINA_FALSE
Since :
3.0
Examples:
banshee.c, complex-types-server.c, complex-types.c, and connman-list-services.c.

Moves the iterator to the next field, if any.

Parameters:
iteriterator
Returns:
if iterator was reach to end return EINA_FALSE
Since :
3.0

Returns the current signature of a message iterator.

Parameters:
iterThe iterator on which to query the signature.
Returns:
A string containing the message iterator signature.
Note:
The returned string must be freed.
Since :
3.0
Examples:
complex-types-server.c, complex-types.c, and connman-list-services.c.