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telepathy-glib Reference Manual | |
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Manipulating a{sv} mappingsManipulating a{sv} mappings — Functions to manipulate mappings from string to variant, as represented in dbus-glib by a GHashTable from string to GValue |
#include <telepathy-glib/dbus.h> #define tp_asv_size (asv) GHashTable* tp_asv_new (const gchar *first_key, ...); gboolean tp_asv_get_boolean (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_boolean (GHashTable *asv, const gchar *key, gboolean value); gpointer tp_asv_get_boxed (const GHashTable *asv, const gchar *key, GType type); void tp_asv_set_boxed (GHashTable *asv, const gchar *key, GType type, gconstpointer value); void tp_asv_take_boxed (GHashTable *asv, const gchar *key, GType type, gpointer value); void tp_asv_set_static_boxed (GHashTable *asv, const gchar *key, GType type, gconstpointer value); const GArray* tp_asv_get_bytes (const GHashTable *asv, const gchar *key); void tp_asv_set_bytes (GHashTable *asv, const gchar *key, guint length, gconstpointer bytes); void tp_asv_take_bytes (GHashTable *asv, const gchar *key, GArray *value); gdouble tp_asv_get_double (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_double (GHashTable *asv, const gchar *key, gdouble value); gint32 tp_asv_get_int32 (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_int32 (GHashTable *asv, const gchar *key, gint32 value); gint64 tp_asv_get_int64 (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_int64 (GHashTable *asv, const gchar *key, gint64 value); const gchar* tp_asv_get_object_path (const GHashTable *asv, const gchar *key); void tp_asv_set_object_path (GHashTable *asv, const gchar *key, const gchar *value); void tp_asv_take_object_path (GHashTable *asv, const gchar *key, gchar *value); void tp_asv_set_static_object_path (GHashTable *asv, const gchar *key, const gchar *value); const gchar* tp_asv_get_string (const GHashTable *asv, const gchar *key); void tp_asv_set_string (GHashTable *asv, const gchar *key, const gchar *value); void tp_asv_take_string (GHashTable *asv, const gchar *key, gchar *value); void tp_asv_set_static_string (GHashTable *asv, const gchar *key, const gchar *value); const gchar* const * tp_asv_get_strv (const GHashTable *asv, const gchar *key); void tp_asv_set_strv (GHashTable *asv, const gchar *key, gchar **value); guint32 tp_asv_get_uint32 (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_uint32 (GHashTable *asv, const gchar *key, guint32 value); guint64 tp_asv_get_uint64 (const GHashTable *asv, const gchar *key, gboolean *valid); void tp_asv_set_uint64 (GHashTable *asv, const gchar *key, guint64 value); const GValue* tp_asv_lookup (const GHashTable *asv, const gchar *key); void tp_asv_dump (GHashTable *asv);
Mappings from string to variant (D-Bus signature a{sv}) are commonly used to provide extensibility, but in dbus-glib they're somewhat awkward to deal with.
These functions provide convenient access to the values in such a mapping.
They also work around the fact that none of the GHashTable public API takes a const pointer to a GHashTable, even the read-only methods that logically ought to.
Parts of telepathy-glib return const pointers to GHashTable, to encourage the use of this API.
#define tp_asv_size(asv) _tp_asv_size_inline (asv)
Return the size of asv as if via g_hash_table_size().
The only difference is that this version takes a const GHashTable and casts it.
asv : |
a GHashTable |
Since 0.7.12
GHashTable* tp_asv_new (const gchar *first_key,
...);
Creates a new GHashTable for use with a{sv} maps, containing the values passed in as parameters.
The GHashTable is synonymous with:
GHashTable *asv = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) tp_g_value_slice_free);
Followed by manual insertion of each of the parameters.
Parameters are stored in slice-allocated GValues and should be set using tp_asv_set_*() and retrieved using tp_asv_get_*().
tp_g_value_slice_new() and tp_g_value_slice_dup() may also be used to insert
into the map if required.
g_hash_table_insert (parameters, "account",
tp_g_value_slice_new_string ("[email protected]"));
Example 1. Using tp_asv_new()
GHashTable *parameters = tp_asv_new ( "answer", G_TYPE_INT, 42, "question", G_TYPE_STRING, "We just don't know", NULL);
Allocated values will be automatically free'd when overwritten, removed or
the hash table destroyed with g_hash_table_destroy().
first_key : |
the name of the first key (or NULL) |
... : |
type and value for the first key, followed by a NULL-terminated list of (key, type, value) tuples |
| Returns : | a newly created GHashTable for storing a{sv} maps, free with
g_hash_table_destroy().
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Since 0.7.29
gboolean tp_asv_get_boolean (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present and boolean, return it,
and set *valid to TRUE if valid is not NULL.
Otherwise return FALSE, and set *valid to FALSE if valid is not NULL.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location to store TRUE if the key actually
exists and has a boolean value
|
| Returns : | a boolean value for key
|
Since 0.7.9
void tp_asv_set_boolean (GHashTable *asv,
const gchar *key,
gboolean value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_boolean(), tp_g_value_slice_new_boolean()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
gpointer tp_asv_get_boxed (const GHashTable *asv,
const gchar *key,
GType type);
If a value for key in asv is present and is of the desired type,
return it.
Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it, for instance with
g_boxed_copy(), if you need to keep it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
type : |
The type that the key's value should have, which must be derived
from G_TYPE_BOXED
|
| Returns : | the value of key, or NULL
|
Since 0.7.9
void tp_asv_set_boxed (GHashTable *asv,
const gchar *key,
GType type,
gconstpointer value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_boxed(), tp_g_value_slice_new_boxed()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
type : |
the type of the key's value, which must be derived from G_TYPE_BOXED
|
value : |
value |
Since 0.7.29
void tp_asv_take_boxed (GHashTable *asv,
const gchar *key,
GType type,
gpointer value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_boxed(), tp_g_value_slice_new_take_boxed()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
type : |
the type of the key's value, which must be derived from G_TYPE_BOXED
|
value : |
value |
Since 0.7.29
void tp_asv_set_static_boxed (GHashTable *asv,
const gchar *key,
GType type,
gconstpointer value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_boxed(),
tp_g_value_slice_new_static_boxed()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
type : |
the type of the key's value, which must be derived from G_TYPE_BOXED
|
value : |
value |
Since 0.7.29
const GArray* tp_asv_get_bytes (const GHashTable *asv,
const gchar *key);
If a value for key in asv is present and is an array of bytes
(its GType is DBUS_TYPE_G_UCHAR_ARRAY), return it.
Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it with
g_boxed_copy (DBUS_TYPE_G_UCHAR_ARRAY, ...) if you need to keep
it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
| Returns : | the string value of key, or NULL
|
Since 0.7.9
void tp_asv_set_bytes (GHashTable *asv,
const gchar *key,
guint length,
gconstpointer bytes);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_bytes(), tp_g_value_slice_new_bytes()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
length : |
the number of bytes to copy |
bytes : |
location of an array of bytes to be copied (this may be NULL
if and only if length is 0)
|
Since 0.7.29
void tp_asv_take_bytes (GHashTable *asv,
const gchar *key,
GArray *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_bytes(), tp_g_value_slice_new_take_bytes()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
a non-NULL GArray of guchar, ownership of which will be taken by
the GValue
|
Since 0.7.29
gdouble tp_asv_get_double (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present and has any numeric type used by
dbus-glib (guchar, gint, guint, gint64, guint64 or gdouble),
return it as a double, and if valid is not NULL, set *valid to TRUE.
Otherwise, return 0.0, and if valid is not NULL, set *valid to FALSE.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location in which to store TRUE on success or
FALSE on failure
|
| Returns : | the double precision floating-point value of key, or 0.0
|
Since 0.7.9
void tp_asv_set_double (GHashTable *asv,
const gchar *key,
gdouble value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_double(), tp_g_value_slice_new_double()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
gint32 tp_asv_get_int32 (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present, has an integer type used by
dbus-glib (guchar, gint, guint, gint64 or guint64) and fits in the
range of a gint32, return it, and if valid is not NULL, set *valid to
TRUE.
Otherwise, return 0, and if valid is not NULL, set *valid to FALSE.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location in which to store TRUE on success or
FALSE on failure
|
| Returns : | the 32-bit signed integer value of key, or 0
|
Since 0.7.9
void tp_asv_set_int32 (GHashTable *asv,
const gchar *key,
gint32 value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_int32(), tp_g_value_slice_new_int()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
gint64 tp_asv_get_int64 (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present, has an integer type used by
dbus-glib (guchar, gint, guint, gint64 or guint64) and fits in the
range of a gint64, return it, and if valid is not NULL, set *valid to
TRUE.
Otherwise, return 0, and if valid is not NULL, set *valid to FALSE.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location in which to store TRUE on success or
FALSE on failure
|
| Returns : | the 64-bit signed integer value of key, or 0
|
Since 0.7.9
void tp_asv_set_int64 (GHashTable *asv,
const gchar *key,
gint64 value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_int64(), tp_g_value_slice_new_int64()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
const gchar* tp_asv_get_object_path (const GHashTable *asv,
const gchar *key);
If a value for key in asv is present and is an object path, return it.
Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it with g_strdup() if you
need to keep it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
| Returns : | the object-path value of key, or NULL
|
Since 0.7.9
void tp_asv_set_object_path (GHashTable *asv,
const gchar *key,
const gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_object_path(),
tp_g_value_slice_new_object_path()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
void tp_asv_take_object_path (GHashTable *asv,
const gchar *key,
gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_object_path(),
tp_g_value_slice_new_take_object_path()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
void tp_asv_set_static_object_path (GHashTable *asv,
const gchar *key,
const gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_object_path(),
tp_g_value_slice_new_static_object_path()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
const gchar* tp_asv_get_string (const GHashTable *asv,
const gchar *key);
If a value for key in asv is present and is a string, return it.
Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it with g_strdup() if you
need to keep it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
| Returns : | the string value of key, or NULL
|
Since 0.7.9
void tp_asv_set_string (GHashTable *asv,
const gchar *key,
const gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_string(), tp_g_value_slice_new_string()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
void tp_asv_take_string (GHashTable *asv,
const gchar *key,
gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_string(),
tp_g_value_slice_new_take_string()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
void tp_asv_set_static_string (GHashTable *asv,
const gchar *key,
const gchar *value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_string(),
tp_g_value_slice_new_static_string()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
const gchar* const * tp_asv_get_strv (const GHashTable *asv,
const gchar *key);
If a value for key in asv is present and is an array of strings (strv),
return it.
Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it with g_strdupv() if you
need to keep it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
| Returns : | the NULL-terminated string-array value of key, or NULL
|
Since 0.7.9
void tp_asv_set_strv (GHashTable *asv,
const gchar *key,
gchar **value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_strv()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
a NULL-terminated string array
|
Since 0.7.29
guint32 tp_asv_get_uint32 (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present, has an integer type used by
dbus-glib (guchar, gint, guint, gint64 or guint64) and fits in the
range of a guint32, return it, and if valid is not NULL, set *valid to
TRUE.
Otherwise, return 0, and if valid is not NULL, set *valid to FALSE.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location in which to store TRUE on success or
FALSE on failure
|
| Returns : | the 32-bit unsigned integer value of key, or 0
|
Since 0.7.9
void tp_asv_set_uint32 (GHashTable *asv,
const gchar *key,
guint32 value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_uint32(), tp_g_value_slice_new_uint()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
guint64 tp_asv_get_uint64 (const GHashTable *asv,
const gchar *key,
gboolean *valid);
If a value for key in asv is present, has an integer type used by
dbus-glib (guchar, gint, guint, gint64 or guint64) and is non-negative,
return it, and if valid is not NULL, set *valid to TRUE.
Otherwise, return 0, and if valid is not NULL, set *valid to FALSE.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
valid : |
Either NULL, or a location in which to store TRUE on success or
FALSE on failure
|
| Returns : | the 64-bit unsigned integer value of key, or 0
|
Since 0.7.9
void tp_asv_set_uint64 (GHashTable *asv,
const gchar *key,
guint64 value);
Stores the value in the map.
The value is stored as a slice-allocated GValue.
See Also: tp_asv_new(), tp_asv_get_uint64(), tp_g_value_slice_new_uint64()
asv : |
a GHashTable created with tp_asv_new()
|
key : |
string key |
value : |
value |
Since 0.7.29
const GValue* tp_asv_lookup (const GHashTable *asv,
const gchar *key);
If a value for key in asv is present, return it. Otherwise return NULL.
The returned value is not copied, and is only valid as long as the value
for key in asv is not removed or altered. Copy it with (for instance)
g_value_copy() if you need to keep it for longer.
asv : |
A GHashTable where the keys are strings and the values are GValues |
key : |
The key to look up |
| Returns : | the value of key, or NULL
|
Since 0.7.9
void tp_asv_dump (GHashTable *asv);
Dumps the a{sv} map to the debugging console.
The purpose of this function is give the programmer the ability to easily inspect the contents of an a{sv} map for debugging purposes.
asv : |
a GHashTable created with tp_asv_new()
|