Table Functions

Functions
NT_Entry	NT_GetEntry (NT_Inst inst, const struct WPI_String *name)
	Get Entry Handle.
void	NT_GetEntryName (NT_Entry entry, struct WPI_String *name)
	Gets the name of the specified entry.
enum NT_Type	NT_GetEntryType (NT_Entry entry)
	Gets the type for the specified key, or unassigned if non existent.
uint64_t	NT_GetEntryLastChange (NT_Entry entry)
	Gets the last time the entry was changed.
void	NT_GetEntryValue (NT_Entry entry, struct NT_Value *value)
	Get Entry Value.
void	NT_GetEntryValueType (NT_Entry entry, unsigned int types, struct NT_Value *value)
	Get Entry Value.
NT_Bool	NT_SetDefaultEntryValue (NT_Entry entry, const struct NT_Value *default_value)
	Set Default Entry Value.
NT_Bool	NT_SetEntryValue (NT_Entry entry, const struct NT_Value *value)
	Set Entry Value.
void	NT_SetEntryFlags (NT_Entry entry, unsigned int flags)
	Set Entry Flags.
unsigned int	NT_GetEntryFlags (NT_Entry entry)
	Get Entry Flags.
struct NT_Value *	NT_ReadQueueValue (NT_Handle subentry, size_t *count)
	Read Entry Queue.
struct NT_Value *	NT_ReadQueueValueType (NT_Handle subentry, unsigned int types, size_t *count)
	Read Entry Queue.

Detailed Description

Function Documentation

NT_GetEntry()

NT_Entry NT_GetEntry	(	NT_Inst	inst,
		const struct WPI_String *	name )

Get Entry Handle.

Parameters

inst	instance handle
name	entry name (UTF-8 string)

Returns

entry handle

NT_GetEntryFlags()

unsigned int NT_GetEntryFlags

(

NT_Entry

entry

)

Get Entry Flags.

Parameters

entry

entry handle

Returns

Flags value (bitmask of NT_EntryFlags)

NT_GetEntryLastChange()

uint64_t NT_GetEntryLastChange

(

NT_Entry

entry

)

Gets the last time the entry was changed.

Returns 0 if the handle is invalid.

Parameters

entry

entry handle

Returns

Entry last change time

NT_GetEntryName()

void NT_GetEntryName	(	NT_Entry	entry,
		struct WPI_String *	name )

Gets the name of the specified entry.

Returns an empty string if the handle is invalid.

Parameters

entry	entry handle
name	entry name (output parameter)

NT_GetEntryType()

enum NT_Type NT_GetEntryType

(

NT_Entry

entry

)

Gets the type for the specified key, or unassigned if non existent.

Parameters

entry

entry handle

Returns

Entry type

NT_GetEntryValue()

void NT_GetEntryValue	(	NT_Entry	entry,
		struct NT_Value *	value )

Get Entry Value.

Returns copy of current entry value. Note that one of the type options is "unassigned".

Parameters

entry	entry handle
value	storage for returned entry value

It is the caller's responsibility to free value once it's no longer needed (the utility function NT_DisposeValue() is useful for this purpose).

NT_GetEntryValueType()

void NT_GetEntryValueType	(	NT_Entry	entry,
		unsigned int	types,
		struct NT_Value *	value )

Get Entry Value.

Returns copy of current entry value. Note that one of the type options is "unassigned".

Parameters

entry	entry handle
types	bitmask of NT_Type values; 0 is treated specially as a "don't care"
value	storage for returned entry value

It is the caller's responsibility to free value once it's no longer needed (the utility function NT_DisposeValue() is useful for this purpose).

NT_ReadQueueValue()

struct NT_Value * NT_ReadQueueValue	(	NT_Handle	subentry,
		size_t *	count )

Read Entry Queue.

Returns new entry values since last call. The returned array must be freed using NT_DisposeValueArray().

Parameters

subentry	subscriber or entry handle
count	count of items in returned array (output)

Returns

entry value array; returns NULL and count=0 if no new values

NT_ReadQueueValueType()

struct NT_Value * NT_ReadQueueValueType	(	NT_Handle	subentry,
		unsigned int	types,
		size_t *	count )

Read Entry Queue.

Returns new entry values since last call. The returned array must be freed using NT_DisposeValueArray().

Parameters

subentry	subscriber or entry handle
types	bitmask of NT_Type values; 0 is treated specially as a "don't care"
count	count of items in returned array (output)

Returns

entry value array; returns NULL and count=0 if no new values

NT_SetDefaultEntryValue()

NT_Bool NT_SetDefaultEntryValue	(	NT_Entry	entry,
		const struct NT_Value *	default_value )

Set Default Entry Value.

Returns 0 if name exists. Otherwise, sets passed in value, and returns 1. Note that one of the type options is "unassigned".

Parameters

entry	entry handle
default_value	value to be set if name does not exist

Returns

0 on error (value not set), 1 on success

NT_SetEntryFlags()

void NT_SetEntryFlags	(	NT_Entry	entry,
		unsigned int	flags )

Set Entry Flags.

Parameters

entry	entry handle
flags	flags value (bitmask of NT_EntryFlags)

NT_SetEntryValue()

NT_Bool NT_SetEntryValue	(	NT_Entry	entry,
		const struct NT_Value *	value )

Set Entry Value.

Sets new entry value. If type of new value differs from the type of the currently stored entry, returns error and does not update value.

Parameters

entry	entry handle
value	new entry value

Returns

0 on error (type mismatch), 1 on success